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authorLinus Torvalds <torvalds@linux-foundation.org>2017-02-27 23:03:04 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2017-02-27 23:03:04 -0800
commit3f5595e3d0180305cfef9a9c7c6265d7ade85dea (patch)
treeaaeca311f61794ff26be9bcdc3491e0c44ff0d67
parentMerge branch 'for-4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq (diff)
parents390: TASK_SIZE for kernel threads (diff)
downloadlinux-dev-3f5595e3d0180305cfef9a9c7c6265d7ade85dea.tar.xz
linux-dev-3f5595e3d0180305cfef9a9c7c6265d7ade85dea.zip
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull more s390 updates from Martin Schwidefsky: "Next to the usual bug fixes (including the TASK_SIZE fix), there is one larger crypto item. It allows to use protected keys with the in-kernel crypto API The protected key support has two parts, the pkey user space API to convert key formats and the paes crypto module that uses a protected key instead of a standard AES key" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: s390: TASK_SIZE for kernel threads s390/crypt: Add protected key AES module s390/dasd: fix spelling mistake: "supportet" -> "supported" s390/pkey: Introduce pkey kernel module s390/zcrypt: export additional symbols s390/zcrypt: Rework CONFIG_ZCRYPT Kconfig text. s390/zcrypt: Cleanup leftover module code. s390/nmi: purge tlbs after control register validation s390/nmi: fix order of register validation s390/crypto: Add PCKMO inline function s390/zcrypt: Enable request count reset for cards and queues. s390/mm: use _SEGMENT_ENTRY_EMPTY in the code s390/chsc: Add exception handler for CHSC instruction s390: opt into HAVE_COPY_THREAD_TLS s390: restore address space when returning to user space s390: rename CIF_ASCE to CIF_ASCE_PRIMARY
-rw-r--r--arch/s390/Kconfig1
-rw-r--r--arch/s390/configs/default_defconfig1
-rw-r--r--arch/s390/configs/performance_defconfig1
-rw-r--r--arch/s390/crypto/Makefile2
-rw-r--r--arch/s390/crypto/paes_s390.c619
-rw-r--r--arch/s390/defconfig1
-rw-r--r--arch/s390/include/asm/cpacf.h46
-rw-r--r--arch/s390/include/asm/mmu_context.h4
-rw-r--r--arch/s390/include/asm/pgtable.h14
-rw-r--r--arch/s390/include/asm/pkey.h90
-rw-r--r--arch/s390/include/asm/processor.h19
-rw-r--r--arch/s390/include/asm/uaccess.h23
-rw-r--r--arch/s390/include/uapi/asm/Kbuild1
-rw-r--r--arch/s390/include/uapi/asm/pkey.h112
-rw-r--r--arch/s390/kernel/entry.S33
-rw-r--r--arch/s390/kernel/entry.h1
-rw-r--r--arch/s390/kernel/nmi.c25
-rw-r--r--arch/s390/kernel/process.c18
-rw-r--r--arch/s390/mm/gmap.c6
-rw-r--r--arch/s390/mm/hugetlbpage.c2
-rw-r--r--drivers/crypto/Kconfig32
-rw-r--r--drivers/s390/block/dasd_eckd.c2
-rw-r--r--drivers/s390/cio/ioasm.c8
-rw-r--r--drivers/s390/crypto/Makefile4
-rw-r--r--drivers/s390/crypto/ap_bus.c10
-rw-r--r--drivers/s390/crypto/ap_card.c24
-rw-r--r--drivers/s390/crypto/ap_queue.c21
-rw-r--r--drivers/s390/crypto/pkey_api.c1148
-rw-r--r--drivers/s390/crypto/zcrypt_api.c5
-rw-r--r--drivers/s390/crypto/zcrypt_api.h2
30 files changed, 2182 insertions, 93 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index d5c1073a2584..a2dcef0aacc7 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -134,6 +134,7 @@ config S390
select HAVE_EBPF_JIT if PACK_STACK && HAVE_MARCH_Z196_FEATURES
select HAVE_CMPXCHG_DOUBLE
select HAVE_CMPXCHG_LOCAL
+ select HAVE_COPY_THREAD_TLS
select HAVE_DEBUG_KMEMLEAK
select HAVE_DMA_API_DEBUG
select HAVE_DMA_CONTIGUOUS
diff --git a/arch/s390/configs/default_defconfig b/arch/s390/configs/default_defconfig
index e00975361fec..143b1e00b818 100644
--- a/arch/s390/configs/default_defconfig
+++ b/arch/s390/configs/default_defconfig
@@ -678,6 +678,7 @@ CONFIG_CRYPTO_USER_API_SKCIPHER=m
CONFIG_CRYPTO_USER_API_RNG=m
CONFIG_CRYPTO_USER_API_AEAD=m
CONFIG_ZCRYPT=m
+CONFIG_PKEY=m
CONFIG_CRYPTO_SHA1_S390=m
CONFIG_CRYPTO_SHA256_S390=m
CONFIG_CRYPTO_SHA512_S390=m
diff --git a/arch/s390/configs/performance_defconfig b/arch/s390/configs/performance_defconfig
index 2cf87343b590..2358bf33c5ef 100644
--- a/arch/s390/configs/performance_defconfig
+++ b/arch/s390/configs/performance_defconfig
@@ -628,6 +628,7 @@ CONFIG_CRYPTO_USER_API_SKCIPHER=m
CONFIG_CRYPTO_USER_API_RNG=m
CONFIG_CRYPTO_USER_API_AEAD=m
CONFIG_ZCRYPT=m
+CONFIG_PKEY=m
CONFIG_CRYPTO_SHA1_S390=m
CONFIG_CRYPTO_SHA256_S390=m
CONFIG_CRYPTO_SHA512_S390=m
diff --git a/arch/s390/crypto/Makefile b/arch/s390/crypto/Makefile
index d1033de4c4ee..402c530c6da5 100644
--- a/arch/s390/crypto/Makefile
+++ b/arch/s390/crypto/Makefile
@@ -6,7 +6,7 @@ obj-$(CONFIG_CRYPTO_SHA1_S390) += sha1_s390.o sha_common.o
obj-$(CONFIG_CRYPTO_SHA256_S390) += sha256_s390.o sha_common.o
obj-$(CONFIG_CRYPTO_SHA512_S390) += sha512_s390.o sha_common.o
obj-$(CONFIG_CRYPTO_DES_S390) += des_s390.o
-obj-$(CONFIG_CRYPTO_AES_S390) += aes_s390.o
+obj-$(CONFIG_CRYPTO_AES_S390) += aes_s390.o paes_s390.o
obj-$(CONFIG_S390_PRNG) += prng.o
obj-$(CONFIG_CRYPTO_GHASH_S390) += ghash_s390.o
obj-$(CONFIG_CRYPTO_CRC32_S390) += crc32-vx_s390.o
diff --git a/arch/s390/crypto/paes_s390.c b/arch/s390/crypto/paes_s390.c
new file mode 100644
index 000000000000..d69ea495c4d7
--- /dev/null
+++ b/arch/s390/crypto/paes_s390.c
@@ -0,0 +1,619 @@
+/*
+ * Cryptographic API.
+ *
+ * s390 implementation of the AES Cipher Algorithm with protected keys.
+ *
+ * s390 Version:
+ * Copyright IBM Corp. 2017
+ * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
+ * Harald Freudenberger <freude@de.ibm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License (version 2 only)
+ * as published by the Free Software Foundation.
+ *
+ */
+
+#define KMSG_COMPONENT "paes_s390"
+#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+
+#include <crypto/aes.h>
+#include <crypto/algapi.h>
+#include <linux/bug.h>
+#include <linux/err.h>
+#include <linux/module.h>
+#include <linux/cpufeature.h>
+#include <linux/init.h>
+#include <linux/spinlock.h>
+#include <crypto/xts.h>
+#include <asm/cpacf.h>
+#include <asm/pkey.h>
+
+static u8 *ctrblk;
+static DEFINE_SPINLOCK(ctrblk_lock);
+
+static cpacf_mask_t km_functions, kmc_functions, kmctr_functions;
+
+struct s390_paes_ctx {
+ struct pkey_seckey sk;
+ struct pkey_protkey pk;
+ unsigned long fc;
+};
+
+struct s390_pxts_ctx {
+ struct pkey_seckey sk[2];
+ struct pkey_protkey pk[2];
+ unsigned long fc;
+};
+
+static inline int __paes_convert_key(struct pkey_seckey *sk,
+ struct pkey_protkey *pk)
+{
+ int i, ret;
+
+ /* try three times in case of failure */
+ for (i = 0; i < 3; i++) {
+ ret = pkey_skey2pkey(sk, pk);
+ if (ret == 0)
+ break;
+ }
+
+ return ret;
+}
+
+static int __paes_set_key(struct s390_paes_ctx *ctx)
+{
+ unsigned long fc;
+
+ if (__paes_convert_key(&ctx->sk, &ctx->pk))
+ return -EINVAL;
+
+ /* Pick the correct function code based on the protected key type */
+ fc = (ctx->pk.type == PKEY_KEYTYPE_AES_128) ? CPACF_KM_PAES_128 :
+ (ctx->pk.type == PKEY_KEYTYPE_AES_192) ? CPACF_KM_PAES_192 :
+ (ctx->pk.type == PKEY_KEYTYPE_AES_256) ? CPACF_KM_PAES_256 : 0;
+
+ /* Check if the function code is available */
+ ctx->fc = (fc && cpacf_test_func(&km_functions, fc)) ? fc : 0;
+
+ return ctx->fc ? 0 : -EINVAL;
+}
+
+static int ecb_paes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
+ unsigned int key_len)
+{
+ struct s390_paes_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ if (key_len != SECKEYBLOBSIZE)
+ return -EINVAL;
+
+ memcpy(ctx->sk.seckey, in_key, SECKEYBLOBSIZE);
+ if (__paes_set_key(ctx)) {
+ tfm->crt_flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static int ecb_paes_crypt(struct blkcipher_desc *desc,
+ unsigned long modifier,
+ struct blkcipher_walk *walk)
+{
+ struct s390_paes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
+ unsigned int nbytes, n, k;
+ int ret;
+
+ ret = blkcipher_walk_virt(desc, walk);
+ while ((nbytes = walk->nbytes) >= AES_BLOCK_SIZE) {
+ /* only use complete blocks */
+ n = nbytes & ~(AES_BLOCK_SIZE - 1);
+ k = cpacf_km(ctx->fc | modifier, ctx->pk.protkey,
+ walk->dst.virt.addr, walk->src.virt.addr, n);
+ if (k)
+ ret = blkcipher_walk_done(desc, walk, nbytes - k);
+ if (k < n) {
+ if (__paes_set_key(ctx) != 0)
+ return blkcipher_walk_done(desc, walk, -EIO);
+ }
+ }
+ return ret;
+}
+
+static int ecb_paes_encrypt(struct blkcipher_desc *desc,
+ struct scatterlist *dst, struct scatterlist *src,
+ unsigned int nbytes)
+{
+ struct blkcipher_walk walk;
+
+ blkcipher_walk_init(&walk, dst, src, nbytes);
+ return ecb_paes_crypt(desc, CPACF_ENCRYPT, &walk);
+}
+
+static int ecb_paes_decrypt(struct blkcipher_desc *desc,
+ struct scatterlist *dst, struct scatterlist *src,
+ unsigned int nbytes)
+{
+ struct blkcipher_walk walk;
+
+ blkcipher_walk_init(&walk, dst, src, nbytes);
+ return ecb_paes_crypt(desc, CPACF_DECRYPT, &walk);
+}
+
+static struct crypto_alg ecb_paes_alg = {
+ .cra_name = "ecb(paes)",
+ .cra_driver_name = "ecb-paes-s390",
+ .cra_priority = 400, /* combo: aes + ecb */
+ .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
+ .cra_blocksize = AES_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct s390_paes_ctx),
+ .cra_type = &crypto_blkcipher_type,
+ .cra_module = THIS_MODULE,
+ .cra_list = LIST_HEAD_INIT(ecb_paes_alg.cra_list),
+ .cra_u = {
+ .blkcipher = {
+ .min_keysize = SECKEYBLOBSIZE,
+ .max_keysize = SECKEYBLOBSIZE,
+ .setkey = ecb_paes_set_key,
+ .encrypt = ecb_paes_encrypt,
+ .decrypt = ecb_paes_decrypt,
+ }
+ }
+};
+
+static int __cbc_paes_set_key(struct s390_paes_ctx *ctx)
+{
+ unsigned long fc;
+
+ if (__paes_convert_key(&ctx->sk, &ctx->pk))
+ return -EINVAL;
+
+ /* Pick the correct function code based on the protected key type */
+ fc = (ctx->pk.type == PKEY_KEYTYPE_AES_128) ? CPACF_KMC_PAES_128 :
+ (ctx->pk.type == PKEY_KEYTYPE_AES_192) ? CPACF_KMC_PAES_192 :
+ (ctx->pk.type == PKEY_KEYTYPE_AES_256) ? CPACF_KMC_PAES_256 : 0;
+
+ /* Check if the function code is available */
+ ctx->fc = (fc && cpacf_test_func(&kmc_functions, fc)) ? fc : 0;
+
+ return ctx->fc ? 0 : -EINVAL;
+}
+
+static int cbc_paes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
+ unsigned int key_len)
+{
+ struct s390_paes_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ memcpy(ctx->sk.seckey, in_key, SECKEYBLOBSIZE);
+ if (__cbc_paes_set_key(ctx)) {
+ tfm->crt_flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static int cbc_paes_crypt(struct blkcipher_desc *desc, unsigned long modifier,
+ struct blkcipher_walk *walk)
+{
+ struct s390_paes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
+ unsigned int nbytes, n, k;
+ int ret;
+ struct {
+ u8 iv[AES_BLOCK_SIZE];
+ u8 key[MAXPROTKEYSIZE];
+ } param;
+
+ ret = blkcipher_walk_virt(desc, walk);
+ memcpy(param.iv, walk->iv, AES_BLOCK_SIZE);
+ memcpy(param.key, ctx->pk.protkey, MAXPROTKEYSIZE);
+ while ((nbytes = walk->nbytes) >= AES_BLOCK_SIZE) {
+ /* only use complete blocks */
+ n = nbytes & ~(AES_BLOCK_SIZE - 1);
+ k = cpacf_kmc(ctx->fc | modifier, &param,
+ walk->dst.virt.addr, walk->src.virt.addr, n);
+ if (k)
+ ret = blkcipher_walk_done(desc, walk, nbytes - k);
+ if (n < k) {
+ if (__cbc_paes_set_key(ctx) != 0)
+ return blkcipher_walk_done(desc, walk, -EIO);
+ memcpy(param.key, ctx->pk.protkey, MAXPROTKEYSIZE);
+ }
+ }
+ memcpy(walk->iv, param.iv, AES_BLOCK_SIZE);
+ return ret;
+}
+
+static int cbc_paes_encrypt(struct blkcipher_desc *desc,
+ struct scatterlist *dst, struct scatterlist *src,
+ unsigned int nbytes)
+{
+ struct blkcipher_walk walk;
+
+ blkcipher_walk_init(&walk, dst, src, nbytes);
+ return cbc_paes_crypt(desc, 0, &walk);
+}
+
+static int cbc_paes_decrypt(struct blkcipher_desc *desc,
+ struct scatterlist *dst, struct scatterlist *src,
+ unsigned int nbytes)
+{
+ struct blkcipher_walk walk;
+
+ blkcipher_walk_init(&walk, dst, src, nbytes);
+ return cbc_paes_crypt(desc, CPACF_DECRYPT, &walk);
+}
+
+static struct crypto_alg cbc_paes_alg = {
+ .cra_name = "cbc(paes)",
+ .cra_driver_name = "cbc-paes-s390",
+ .cra_priority = 400, /* combo: aes + cbc */
+ .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
+ .cra_blocksize = AES_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct s390_paes_ctx),
+ .cra_type = &crypto_blkcipher_type,
+ .cra_module = THIS_MODULE,
+ .cra_list = LIST_HEAD_INIT(cbc_paes_alg.cra_list),
+ .cra_u = {
+ .blkcipher = {
+ .min_keysize = SECKEYBLOBSIZE,
+ .max_keysize = SECKEYBLOBSIZE,
+ .ivsize = AES_BLOCK_SIZE,
+ .setkey = cbc_paes_set_key,
+ .encrypt = cbc_paes_encrypt,
+ .decrypt = cbc_paes_decrypt,
+ }
+ }
+};
+
+static int __xts_paes_set_key(struct s390_pxts_ctx *ctx)
+{
+ unsigned long fc;
+
+ if (__paes_convert_key(&ctx->sk[0], &ctx->pk[0]) ||
+ __paes_convert_key(&ctx->sk[1], &ctx->pk[1]))
+ return -EINVAL;
+
+ if (ctx->pk[0].type != ctx->pk[1].type)
+ return -EINVAL;
+
+ /* Pick the correct function code based on the protected key type */
+ fc = (ctx->pk[0].type == PKEY_KEYTYPE_AES_128) ? CPACF_KM_PXTS_128 :
+ (ctx->pk[0].type == PKEY_KEYTYPE_AES_256) ?
+ CPACF_KM_PXTS_256 : 0;
+
+ /* Check if the function code is available */
+ ctx->fc = (fc && cpacf_test_func(&km_functions, fc)) ? fc : 0;
+
+ return ctx->fc ? 0 : -EINVAL;
+}
+
+static int xts_paes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
+ unsigned int key_len)
+{
+ struct s390_pxts_ctx *ctx = crypto_tfm_ctx(tfm);
+ u8 ckey[2 * AES_MAX_KEY_SIZE];
+ unsigned int ckey_len;
+
+ memcpy(ctx->sk[0].seckey, in_key, SECKEYBLOBSIZE);
+ memcpy(ctx->sk[1].seckey, in_key + SECKEYBLOBSIZE, SECKEYBLOBSIZE);
+ if (__xts_paes_set_key(ctx)) {
+ tfm->crt_flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
+ return -EINVAL;
+ }
+
+ /*
+ * xts_check_key verifies the key length is not odd and makes
+ * sure that the two keys are not the same. This can be done
+ * on the two protected keys as well
+ */
+ ckey_len = (ctx->pk[0].type == PKEY_KEYTYPE_AES_128) ?
+ AES_KEYSIZE_128 : AES_KEYSIZE_256;
+ memcpy(ckey, ctx->pk[0].protkey, ckey_len);
+ memcpy(ckey + ckey_len, ctx->pk[1].protkey, ckey_len);
+ return xts_check_key(tfm, ckey, 2*ckey_len);
+}
+
+static int xts_paes_crypt(struct blkcipher_desc *desc, unsigned long modifier,
+ struct blkcipher_walk *walk)
+{
+ struct s390_pxts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
+ unsigned int keylen, offset, nbytes, n, k;
+ int ret;
+ struct {
+ u8 key[MAXPROTKEYSIZE]; /* key + verification pattern */
+ u8 tweak[16];
+ u8 block[16];
+ u8 bit[16];
+ u8 xts[16];
+ } pcc_param;
+ struct {
+ u8 key[MAXPROTKEYSIZE]; /* key + verification pattern */
+ u8 init[16];
+ } xts_param;
+
+ ret = blkcipher_walk_virt(desc, walk);
+ keylen = (ctx->pk[0].type == PKEY_KEYTYPE_AES_128) ? 48 : 64;
+ offset = (ctx->pk[0].type == PKEY_KEYTYPE_AES_128) ? 16 : 0;
+retry:
+ memset(&pcc_param, 0, sizeof(pcc_param));
+ memcpy(pcc_param.tweak, walk->iv, sizeof(pcc_param.tweak));
+ memcpy(pcc_param.key + offset, ctx->pk[1].protkey, keylen);
+ cpacf_pcc(ctx->fc, pcc_param.key + offset);
+
+ memcpy(xts_param.key + offset, ctx->pk[0].protkey, keylen);
+ memcpy(xts_param.init, pcc_param.xts, 16);
+
+ while ((nbytes = walk->nbytes) >= AES_BLOCK_SIZE) {
+ /* only use complete blocks */
+ n = nbytes & ~(AES_BLOCK_SIZE - 1);
+ k = cpacf_km(ctx->fc | modifier, xts_param.key + offset,
+ walk->dst.virt.addr, walk->src.virt.addr, n);
+ if (k)
+ ret = blkcipher_walk_done(desc, walk, nbytes - k);
+ if (k < n) {
+ if (__xts_paes_set_key(ctx) != 0)
+ return blkcipher_walk_done(desc, walk, -EIO);
+ goto retry;
+ }
+ }
+ return ret;
+}
+
+static int xts_paes_encrypt(struct blkcipher_desc *desc,
+ struct scatterlist *dst, struct scatterlist *src,
+ unsigned int nbytes)
+{
+ struct blkcipher_walk walk;
+
+ blkcipher_walk_init(&walk, dst, src, nbytes);
+ return xts_paes_crypt(desc, 0, &walk);
+}
+
+static int xts_paes_decrypt(struct blkcipher_desc *desc,
+ struct scatterlist *dst, struct scatterlist *src,
+ unsigned int nbytes)
+{
+ struct blkcipher_walk walk;
+
+ blkcipher_walk_init(&walk, dst, src, nbytes);
+ return xts_paes_crypt(desc, CPACF_DECRYPT, &walk);
+}
+
+static struct crypto_alg xts_paes_alg = {
+ .cra_name = "xts(paes)",
+ .cra_driver_name = "xts-paes-s390",
+ .cra_priority = 400, /* combo: aes + xts */
+ .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
+ .cra_blocksize = AES_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct s390_pxts_ctx),
+ .cra_type = &crypto_blkcipher_type,
+ .cra_module = THIS_MODULE,
+ .cra_list = LIST_HEAD_INIT(xts_paes_alg.cra_list),
+ .cra_u = {
+ .blkcipher = {
+ .min_keysize = 2 * SECKEYBLOBSIZE,
+ .max_keysize = 2 * SECKEYBLOBSIZE,
+ .ivsize = AES_BLOCK_SIZE,
+ .setkey = xts_paes_set_key,
+ .encrypt = xts_paes_encrypt,
+ .decrypt = xts_paes_decrypt,
+ }
+ }
+};
+
+static int __ctr_paes_set_key(struct s390_paes_ctx *ctx)
+{
+ unsigned long fc;
+
+ if (__paes_convert_key(&ctx->sk, &ctx->pk))
+ return -EINVAL;
+
+ /* Pick the correct function code based on the protected key type */
+ fc = (ctx->pk.type == PKEY_KEYTYPE_AES_128) ? CPACF_KMCTR_PAES_128 :
+ (ctx->pk.type == PKEY_KEYTYPE_AES_192) ? CPACF_KMCTR_PAES_192 :
+ (ctx->pk.type == PKEY_KEYTYPE_AES_256) ?
+ CPACF_KMCTR_PAES_256 : 0;
+
+ /* Check if the function code is available */
+ ctx->fc = (fc && cpacf_test_func(&kmctr_functions, fc)) ? fc : 0;
+
+ return ctx->fc ? 0 : -EINVAL;
+}
+
+static int ctr_paes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
+ unsigned int key_len)
+{
+ struct s390_paes_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ memcpy(ctx->sk.seckey, in_key, key_len);
+ if (__ctr_paes_set_key(ctx)) {
+ tfm->crt_flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static unsigned int __ctrblk_init(u8 *ctrptr, u8 *iv, unsigned int nbytes)
+{
+ unsigned int i, n;
+
+ /* only use complete blocks, max. PAGE_SIZE */
+ memcpy(ctrptr, iv, AES_BLOCK_SIZE);
+ n = (nbytes > PAGE_SIZE) ? PAGE_SIZE : nbytes & ~(AES_BLOCK_SIZE - 1);
+ for (i = (n / AES_BLOCK_SIZE) - 1; i > 0; i--) {
+ memcpy(ctrptr + AES_BLOCK_SIZE, ctrptr, AES_BLOCK_SIZE);
+ crypto_inc(ctrptr + AES_BLOCK_SIZE, AES_BLOCK_SIZE);
+ ctrptr += AES_BLOCK_SIZE;
+ }
+ return n;
+}
+
+static int ctr_paes_crypt(struct blkcipher_desc *desc, unsigned long modifier,
+ struct blkcipher_walk *walk)
+{
+ struct s390_paes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
+ u8 buf[AES_BLOCK_SIZE], *ctrptr;
+ unsigned int nbytes, n, k;
+ int ret, locked;
+
+ locked = spin_trylock(&ctrblk_lock);
+
+ ret = blkcipher_walk_virt_block(desc, walk, AES_BLOCK_SIZE);
+ while ((nbytes = walk->nbytes) >= AES_BLOCK_SIZE) {
+ n = AES_BLOCK_SIZE;
+ if (nbytes >= 2*AES_BLOCK_SIZE && locked)
+ n = __ctrblk_init(ctrblk, walk->iv, nbytes);
+ ctrptr = (n > AES_BLOCK_SIZE) ? ctrblk : walk->iv;
+ k = cpacf_kmctr(ctx->fc | modifier, ctx->pk.protkey,
+ walk->dst.virt.addr, walk->src.virt.addr,
+ n, ctrptr);
+ if (k) {
+ if (ctrptr == ctrblk)
+ memcpy(walk->iv, ctrptr + k - AES_BLOCK_SIZE,
+ AES_BLOCK_SIZE);
+ crypto_inc(walk->iv, AES_BLOCK_SIZE);
+ ret = blkcipher_walk_done(desc, walk, nbytes - n);
+ }
+ if (k < n) {
+ if (__ctr_paes_set_key(ctx) != 0)
+ return blkcipher_walk_done(desc, walk, -EIO);
+ }
+ }
+ if (locked)
+ spin_unlock(&ctrblk_lock);
+ /*
+ * final block may be < AES_BLOCK_SIZE, copy only nbytes
+ */
+ if (nbytes) {
+ while (1) {
+ if (cpacf_kmctr(ctx->fc | modifier,
+ ctx->pk.protkey, buf,
+ walk->src.virt.addr, AES_BLOCK_SIZE,
+ walk->iv) == AES_BLOCK_SIZE)
+ break;
+ if (__ctr_paes_set_key(ctx) != 0)
+ return blkcipher_walk_done(desc, walk, -EIO);
+ }
+ memcpy(walk->dst.virt.addr, buf, nbytes);
+ crypto_inc(walk->iv, AES_BLOCK_SIZE);
+ ret = blkcipher_walk_done(desc, walk, 0);
+ }
+
+ return ret;
+}
+
+static int ctr_paes_encrypt(struct blkcipher_desc *desc,
+ struct scatterlist *dst, struct scatterlist *src,
+ unsigned int nbytes)
+{
+ struct blkcipher_walk walk;
+
+ blkcipher_walk_init(&walk, dst, src, nbytes);
+ return ctr_paes_crypt(desc, 0, &walk);
+}
+
+static int ctr_paes_decrypt(struct blkcipher_desc *desc,
+ struct scatterlist *dst, struct scatterlist *src,
+ unsigned int nbytes)
+{
+ struct blkcipher_walk walk;
+
+ blkcipher_walk_init(&walk, dst, src, nbytes);
+ return ctr_paes_crypt(desc, CPACF_DECRYPT, &walk);
+}
+
+static struct crypto_alg ctr_paes_alg = {
+ .cra_name = "ctr(paes)",
+ .cra_driver_name = "ctr-paes-s390",
+ .cra_priority = 400, /* combo: aes + ctr */
+ .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
+ .cra_blocksize = 1,
+ .cra_ctxsize = sizeof(struct s390_paes_ctx),
+ .cra_type = &crypto_blkcipher_type,
+ .cra_module = THIS_MODULE,
+ .cra_list = LIST_HEAD_INIT(ctr_paes_alg.cra_list),
+ .cra_u = {
+ .blkcipher = {
+ .min_keysize = SECKEYBLOBSIZE,
+ .max_keysize = SECKEYBLOBSIZE,
+ .ivsize = AES_BLOCK_SIZE,
+ .setkey = ctr_paes_set_key,
+ .encrypt = ctr_paes_encrypt,
+ .decrypt = ctr_paes_decrypt,
+ }
+ }
+};
+
+static inline void __crypto_unregister_alg(struct crypto_alg *alg)
+{
+ if (!list_empty(&alg->cra_list))
+ crypto_unregister_alg(alg);
+}
+
+static void paes_s390_fini(void)
+{
+ if (ctrblk)
+ free_page((unsigned long) ctrblk);
+ __crypto_unregister_alg(&ctr_paes_alg);
+ __crypto_unregister_alg(&xts_paes_alg);
+ __crypto_unregister_alg(&cbc_paes_alg);
+ __crypto_unregister_alg(&ecb_paes_alg);
+}
+
+static int __init paes_s390_init(void)
+{
+ int ret;
+
+ /* Query available functions for KM, KMC and KMCTR */
+ cpacf_query(CPACF_KM, &km_functions);
+ cpacf_query(CPACF_KMC, &kmc_functions);
+ cpacf_query(CPACF_KMCTR, &kmctr_functions);
+
+ if (cpacf_test_func(&km_functions, CPACF_KM_PAES_128) ||
+ cpacf_test_func(&km_functions, CPACF_KM_PAES_192) ||
+ cpacf_test_func(&km_functions, CPACF_KM_PAES_256)) {
+ ret = crypto_register_alg(&ecb_paes_alg);
+ if (ret)
+ goto out_err;
+ }
+
+ if (cpacf_test_func(&kmc_functions, CPACF_KMC_PAES_128) ||
+ cpacf_test_func(&kmc_functions, CPACF_KMC_PAES_192) ||
+ cpacf_test_func(&kmc_functions, CPACF_KMC_PAES_256)) {
+ ret = crypto_register_alg(&cbc_paes_alg);
+ if (ret)
+ goto out_err;
+ }
+
+ if (cpacf_test_func(&km_functions, CPACF_KM_PXTS_128) ||
+ cpacf_test_func(&km_functions, CPACF_KM_PXTS_256)) {
+ ret = crypto_register_alg(&xts_paes_alg);
+ if (ret)
+ goto out_err;
+ }
+
+ if (cpacf_test_func(&kmctr_functions, CPACF_KMCTR_PAES_128) ||
+ cpacf_test_func(&kmctr_functions, CPACF_KMCTR_PAES_192) ||
+ cpacf_test_func(&kmctr_functions, CPACF_KMCTR_PAES_256)) {
+ ret = crypto_register_alg(&ctr_paes_alg);
+ if (ret)
+ goto out_err;
+ ctrblk = (u8 *) __get_free_page(GFP_KERNEL);
+ if (!ctrblk) {
+ ret = -ENOMEM;
+ goto out_err;
+ }
+ }
+
+ return 0;
+out_err:
+ paes_s390_fini();
+ return ret;
+}
+
+module_init(paes_s390_init);
+module_exit(paes_s390_fini);
+
+MODULE_ALIAS_CRYPTO("aes-all");
+
+MODULE_DESCRIPTION("Rijndael (AES) Cipher Algorithm with protected keys");
+MODULE_LICENSE("GPL");
diff --git a/arch/s390/defconfig b/arch/s390/defconfig
index d00e368fb5e6..68bfd09f1b02 100644
--- a/arch/s390/defconfig
+++ b/arch/s390/defconfig
@@ -229,6 +229,7 @@ CONFIG_CRYPTO_USER_API_HASH=m
CONFIG_CRYPTO_USER_API_SKCIPHER=m
CONFIG_CRYPTO_USER_API_RNG=m
CONFIG_ZCRYPT=m
+CONFIG_PKEY=m
CONFIG_CRYPTO_SHA1_S390=m
CONFIG_CRYPTO_SHA256_S390=m
CONFIG_CRYPTO_SHA512_S390=m
diff --git a/arch/s390/include/asm/cpacf.h b/arch/s390/include/asm/cpacf.h
index 2c680db7e5c1..e2dfbf280d12 100644
--- a/arch/s390/include/asm/cpacf.h
+++ b/arch/s390/include/asm/cpacf.h
@@ -28,8 +28,9 @@
#define CPACF_PPNO 0xb93c /* MSA5 */
/*
- * Decryption modifier bit
+ * En/decryption modifier bits
*/
+#define CPACF_ENCRYPT 0x00
#define CPACF_DECRYPT 0x80
/*
@@ -42,8 +43,13 @@
#define CPACF_KM_AES_128 0x12
#define CPACF_KM_AES_192 0x13
#define CPACF_KM_AES_256 0x14
+#define CPACF_KM_PAES_128 0x1a
+#define CPACF_KM_PAES_192 0x1b
+#define CPACF_KM_PAES_256 0x1c
#define CPACF_KM_XTS_128 0x32
#define CPACF_KM_XTS_256 0x34
+#define CPACF_KM_PXTS_128 0x3a
+#define CPACF_KM_PXTS_256 0x3c
/*
* Function codes for the KMC (CIPHER MESSAGE WITH CHAINING)
@@ -56,6 +62,9 @@
#define CPACF_KMC_AES_128 0x12
#define CPACF_KMC_AES_192 0x13
#define CPACF_KMC_AES_256 0x14
+#define CPACF_KMC_PAES_128 0x1a
+#define CPACF_KMC_PAES_192 0x1b
+#define CPACF_KMC_PAES_256 0x1c
#define CPACF_KMC_PRNG 0x43
/*
@@ -69,6 +78,9 @@
#define CPACF_KMCTR_AES_128 0x12
#define CPACF_KMCTR_AES_192 0x13
#define CPACF_KMCTR_AES_256 0x14
+#define CPACF_KMCTR_PAES_128 0x1a
+#define CPACF_KMCTR_PAES_192 0x1b
+#define CPACF_KMCTR_PAES_256 0x1c
/*
* Function codes for the KIMD (COMPUTE INTERMEDIATE MESSAGE DIGEST)
@@ -99,6 +111,18 @@
#define CPACF_KMAC_TDEA_192 0x03
/*
+ * Function codes for the PCKMO (PERFORM CRYPTOGRAPHIC KEY MANAGEMENT)
+ * instruction
+ */
+#define CPACF_PCKMO_QUERY 0x00
+#define CPACF_PCKMO_ENC_DES_KEY 0x01
+#define CPACF_PCKMO_ENC_TDES_128_KEY 0x02
+#define CPACF_PCKMO_ENC_TDES_192_KEY 0x03
+#define CPACF_PCKMO_ENC_AES_128_KEY 0x12
+#define CPACF_PCKMO_ENC_AES_192_KEY 0x13
+#define CPACF_PCKMO_ENC_AES_256_KEY 0x14
+
+/*
* Function codes for the PPNO (PERFORM PSEUDORANDOM NUMBER OPERATION)
* instruction
*/
@@ -397,4 +421,24 @@ static inline void cpacf_pcc(unsigned long func, void *param)
: "cc", "memory");
}
+/**
+ * cpacf_pckmo() - executes the PCKMO (PERFORM CRYPTOGRAPHIC KEY
+ * MANAGEMENT) instruction
+ * @func: the function code passed to PCKMO; see CPACF_PCKMO_xxx defines
+ * @param: address of parameter block; see POP for details on each func
+ *
+ * Returns 0.
+ */
+static inline void cpacf_pckmo(long func, void *param)
+{
+ register unsigned long r0 asm("0") = (unsigned long) func;
+ register unsigned long r1 asm("1") = (unsigned long) param;
+
+ asm volatile(
+ " .insn rre,%[opc] << 16,0,0\n" /* PCKMO opcode */
+ :
+ : [fc] "d" (r0), [pba] "a" (r1), [opc] "i" (CPACF_PCKMO)
+ : "cc", "memory");
+}
+
#endif /* _ASM_S390_CPACF_H */
diff --git a/arch/s390/include/asm/mmu_context.h b/arch/s390/include/asm/mmu_context.h
index 67f7a991c929..9b828c073176 100644
--- a/arch/s390/include/asm/mmu_context.h
+++ b/arch/s390/include/asm/mmu_context.h
@@ -63,7 +63,7 @@ static inline void set_user_asce(struct mm_struct *mm)
S390_lowcore.user_asce = mm->context.asce;
if (current->thread.mm_segment.ar4)
__ctl_load(S390_lowcore.user_asce, 7, 7);
- set_cpu_flag(CIF_ASCE);
+ set_cpu_flag(CIF_ASCE_PRIMARY);
}
static inline void clear_user_asce(void)
@@ -81,7 +81,7 @@ static inline void load_kernel_asce(void)
__ctl_store(asce, 1, 1);
if (asce != S390_lowcore.kernel_asce)
__ctl_load(S390_lowcore.kernel_asce, 1, 1);
- set_cpu_flag(CIF_ASCE);
+ set_cpu_flag(CIF_ASCE_PRIMARY);
}
static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index 52511866fb14..7ed1972b1920 100644
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -640,12 +640,12 @@ static inline int pud_bad(pud_t pud)
static inline int pmd_present(pmd_t pmd)
{
- return pmd_val(pmd) != _SEGMENT_ENTRY_INVALID;
+ return pmd_val(pmd) != _SEGMENT_ENTRY_EMPTY;
}
static inline int pmd_none(pmd_t pmd)
{
- return pmd_val(pmd) == _SEGMENT_ENTRY_INVALID;
+ return pmd_val(pmd) == _SEGMENT_ENTRY_EMPTY;
}
static inline unsigned long pmd_pfn(pmd_t pmd)
@@ -803,7 +803,7 @@ static inline void pud_clear(pud_t *pud)
static inline void pmd_clear(pmd_t *pmdp)
{
- pmd_val(*pmdp) = _SEGMENT_ENTRY_INVALID;
+ pmd_val(*pmdp) = _SEGMENT_ENTRY_EMPTY;
}
static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
@@ -1357,7 +1357,7 @@ static inline pmd_t pmd_mkhuge(pmd_t pmd)
static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm,
unsigned long addr, pmd_t *pmdp)
{
- return pmdp_xchg_direct(mm, addr, pmdp, __pmd(_SEGMENT_ENTRY_INVALID));
+ return pmdp_xchg_direct(mm, addr, pmdp, __pmd(_SEGMENT_ENTRY_EMPTY));
}
#define __HAVE_ARCH_PMDP_HUGE_GET_AND_CLEAR_FULL
@@ -1367,10 +1367,10 @@ static inline pmd_t pmdp_huge_get_and_clear_full(struct mm_struct *mm,
{
if (full) {
pmd_t pmd = *pmdp;
- *pmdp = __pmd(_SEGMENT_ENTRY_INVALID);
+ *pmdp = __pmd(_SEGMENT_ENTRY_EMPTY);
return pmd;
}
- return pmdp_xchg_lazy(mm, addr, pmdp, __pmd(_SEGMENT_ENTRY_INVALID));
+ return pmdp_xchg_lazy(mm, addr, pmdp, __pmd(_SEGMENT_ENTRY_EMPTY));
}
#define __HAVE_ARCH_PMDP_HUGE_CLEAR_FLUSH
@@ -1384,7 +1384,7 @@ static inline pmd_t pmdp_huge_clear_flush(struct vm_area_struct *vma,
static inline void pmdp_invalidate(struct vm_area_struct *vma,
unsigned long addr, pmd_t *pmdp)
{
- pmdp_xchg_direct(vma->vm_mm, addr, pmdp, __pmd(_SEGMENT_ENTRY_INVALID));
+ pmdp_xchg_direct(vma->vm_mm, addr, pmdp, __pmd(_SEGMENT_ENTRY_EMPTY));
}
#define __HAVE_ARCH_PMDP_SET_WRPROTECT
diff --git a/arch/s390/include/asm/pkey.h b/arch/s390/include/asm/pkey.h
new file mode 100644
index 000000000000..b48aef4188f6
--- /dev/null
+++ b/arch/s390/include/asm/pkey.h
@@ -0,0 +1,90 @@
+/*
+ * Kernelspace interface to the pkey device driver
+ *
+ * Copyright IBM Corp. 2016
+ *
+ * Author: Harald Freudenberger <freude@de.ibm.com>
+ *
+ */
+
+#ifndef _KAPI_PKEY_H
+#define _KAPI_PKEY_H
+
+#include <linux/ioctl.h>
+#include <linux/types.h>
+#include <uapi/asm/pkey.h>
+
+/*
+ * Generate (AES) random secure key.
+ * @param cardnr may be -1 (use default card)
+ * @param domain may be -1 (use default domain)
+ * @param keytype one of the PKEY_KEYTYPE values
+ * @param seckey pointer to buffer receiving the secure key
+ * @return 0 on success, negative errno value on failure
+ */
+int pkey_genseckey(__u16 cardnr, __u16 domain,
+ __u32 keytype, struct pkey_seckey *seckey);
+
+/*
+ * Generate (AES) secure key with given key value.
+ * @param cardnr may be -1 (use default card)
+ * @param domain may be -1 (use default domain)
+ * @param keytype one of the PKEY_KEYTYPE values
+ * @param clrkey pointer to buffer with clear key data
+ * @param seckey pointer to buffer receiving the secure key
+ * @return 0 on success, negative errno value on failure
+ */
+int pkey_clr2seckey(__u16 cardnr, __u16 domain, __u32 keytype,
+ const struct pkey_clrkey *clrkey,
+ struct pkey_seckey *seckey);
+
+/*
+ * Derive (AES) proteced key from the (AES) secure key blob.
+ * @param cardnr may be -1 (use default card)
+ * @param domain may be -1 (use default domain)
+ * @param seckey pointer to buffer with the input secure key
+ * @param protkey pointer to buffer receiving the protected key and
+ * additional info (type, length)
+ * @return 0 on success, negative errno value on failure
+ */
+int pkey_sec2protkey(__u16 cardnr, __u16 domain,
+ const struct pkey_seckey *seckey,
+ struct pkey_protkey *protkey);
+
+/*
+ * Derive (AES) protected key from a given clear key value.
+ * @param keytype one of the PKEY_KEYTYPE values
+ * @param clrkey pointer to buffer with clear key data
+ * @param protkey pointer to buffer receiving the protected key and
+ * additional info (type, length)
+ * @return 0 on success, negative errno value on failure
+ */
+int pkey_clr2protkey(__u32 keytype,
+ const struct pkey_clrkey *clrkey,
+ struct pkey_protkey *protkey);
+
+/*
+ * Search for a matching crypto card based on the Master Key
+ * Verification Pattern provided inside a secure key.
+ * @param seckey pointer to buffer with the input secure key
+ * @param cardnr pointer to cardnr, receives the card number on success
+ * @param domain pointer to domain, receives the domain number on success
+ * @param verify if set, always verify by fetching verification pattern
+ * from card
+ * @return 0 on success, negative errno value on failure. If no card could be
+ * found, -ENODEV is returned.
+ */
+int pkey_findcard(const struct pkey_seckey *seckey,
+ __u16 *cardnr, __u16 *domain, int verify);
+
+/*
+ * Find card and transform secure key to protected key.
+ * @param seckey pointer to buffer with the input secure key
+ * @param protkey pointer to buffer receiving the protected key and
+ * additional info (type, length)
+ * @return 0 on success, negative errno value on failure
+ */
+int pkey_skey2pkey(const struct pkey_seckey *seckey,
+ struct pkey_protkey *protkey);
+
+#endif /* _KAPI_PKEY_H */
diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h
index dacba341e475..e4988710aa86 100644
--- a/arch/s390/include/asm/processor.h
+++ b/arch/s390/include/asm/processor.h
@@ -14,14 +14,16 @@
#include <linux/const.h>
#define CIF_MCCK_PENDING 0 /* machine check handling is pending */
-#define CIF_ASCE 1 /* user asce needs fixup / uaccess */
-#define CIF_NOHZ_DELAY 2 /* delay HZ disable for a tick */
-#define CIF_FPU 3 /* restore FPU registers */
-#define CIF_IGNORE_IRQ 4 /* ignore interrupt (for udelay) */
-#define CIF_ENABLED_WAIT 5 /* in enabled wait state */
+#define CIF_ASCE_PRIMARY 1 /* primary asce needs fixup / uaccess */
+#define CIF_ASCE_SECONDARY 2 /* secondary asce needs fixup / uaccess */
+#define CIF_NOHZ_DELAY 3 /* delay HZ disable for a tick */
+#define CIF_FPU 4 /* restore FPU registers */
+#define CIF_IGNORE_IRQ 5 /* ignore interrupt (for udelay) */
+#define CIF_ENABLED_WAIT 6 /* in enabled wait state */
#define _CIF_MCCK_PENDING _BITUL(CIF_MCCK_PENDING)
-#define _CIF_ASCE _BITUL(CIF_ASCE)
+#define _CIF_ASCE_PRIMARY _BITUL(CIF_ASCE_PRIMARY)
+#define _CIF_ASCE_SECONDARY _BITUL(CIF_ASCE_SECONDARY)
#define _CIF_NOHZ_DELAY _BITUL(CIF_NOHZ_DELAY)
#define _CIF_FPU _BITUL(CIF_FPU)
#define _CIF_IGNORE_IRQ _BITUL(CIF_IGNORE_IRQ)
@@ -89,7 +91,8 @@ extern void execve_tail(void);
* User space process size: 2GB for 31 bit, 4TB or 8PT for 64 bit.
*/
-#define TASK_SIZE_OF(tsk) ((tsk)->mm->context.asce_limit)
+#define TASK_SIZE_OF(tsk) ((tsk)->mm ? \
+ (tsk)->mm->context.asce_limit : TASK_MAX_SIZE)
#define TASK_UNMAPPED_BASE (test_thread_flag(TIF_31BIT) ? \
(1UL << 30) : (1UL << 41))
#define TASK_SIZE TASK_SIZE_OF(current)
@@ -200,10 +203,12 @@ struct stack_frame {
struct task_struct;
struct mm_struct;
struct seq_file;
+struct pt_regs;
typedef int (*dump_trace_func_t)(void *data, unsigned long address, int reliable);
void dump_trace(dump_trace_func_t func, void *data,
struct task_struct *task, unsigned long sp);
+void show_registers(struct pt_regs *regs);
void show_cacheinfo(struct seq_file *m);
diff --git a/arch/s390/include/asm/uaccess.h b/arch/s390/include/asm/uaccess.h
index b2988fc60f65..136932ff4250 100644
--- a/arch/s390/include/asm/uaccess.h
+++ b/arch/s390/include/asm/uaccess.h
@@ -14,6 +14,7 @@
*/
#include <linux/sched.h>
#include <linux/errno.h>
+#include <asm/processor.h>
#include <asm/ctl_reg.h>
#define VERIFY_READ 0
@@ -36,18 +37,20 @@
#define get_ds() (KERNEL_DS)
#define get_fs() (current->thread.mm_segment)
-
-#define set_fs(x) \
-do { \
- unsigned long __pto; \
- current->thread.mm_segment = (x); \
- __pto = current->thread.mm_segment.ar4 ? \
- S390_lowcore.user_asce : S390_lowcore.kernel_asce; \
- __ctl_load(__pto, 7, 7); \
-} while (0)
-
#define segment_eq(a,b) ((a).ar4 == (b).ar4)
+static inline void set_fs(mm_segment_t fs)
+{
+ current->thread.mm_segment = fs;
+ if (segment_eq(fs, KERNEL_DS)) {
+ set_cpu_flag(CIF_ASCE_SECONDARY);
+ __ctl_load(S390_lowcore.kernel_asce, 7, 7);
+ } else {
+ clear_cpu_flag(CIF_ASCE_SECONDARY);
+ __ctl_load(S390_lowcore.user_asce, 7, 7);
+ }
+}
+
static inline int __range_ok(unsigned long addr, unsigned long size)
{
return 1;
diff --git a/arch/s390/include/uapi/asm/Kbuild b/arch/s390/include/uapi/asm/Kbuild
index bf736e764cb4..6848ba5c1454 100644
--- a/arch/s390/include/uapi/asm/Kbuild
+++ b/arch/s390/include/uapi/asm/Kbuild
@@ -24,6 +24,7 @@ header-y += mman.h
header-y += monwriter.h
header-y += msgbuf.h
header-y += param.h
+header-y += pkey.h
header-y += poll.h
header-y += posix_types.h
header-y += ptrace.h
diff --git a/arch/s390/include/uapi/asm/pkey.h b/arch/s390/include/uapi/asm/pkey.h
new file mode 100644
index 000000000000..ed7f19c27ce5
--- /dev/null
+++ b/arch/s390/include/uapi/asm/pkey.h
@@ -0,0 +1,112 @@
+/*
+ * Userspace interface to the pkey device driver
+ *
+ * Copyright IBM Corp. 2017
+ *
+ * Author: Harald Freudenberger <freude@de.ibm.com>
+ *
+ */
+
+#ifndef _UAPI_PKEY_H
+#define _UAPI_PKEY_H
+
+#include <linux/ioctl.h>
+#include <linux/types.h>
+
+/*
+ * Ioctl calls supported by the pkey device driver
+ */
+
+#define PKEY_IOCTL_MAGIC 'p'
+
+#define SECKEYBLOBSIZE 64 /* secure key blob size is always 64 bytes */
+#define MAXPROTKEYSIZE 64 /* a protected key blob may be up to 64 bytes */
+#define MAXCLRKEYSIZE 32 /* a clear key value may be up to 32 bytes */
+
+/* defines for the type field within the pkey_protkey struct */
+#define PKEY_KEYTYPE_AES_128 1
+#define PKEY_KEYTYPE_AES_192 2
+#define PKEY_KEYTYPE_AES_256 3
+
+/* Struct to hold a secure key blob */
+struct pkey_seckey {
+ __u8 seckey[SECKEYBLOBSIZE]; /* the secure key blob */
+};
+
+/* Struct to hold protected key and length info */
+struct pkey_protkey {
+ __u32 type; /* key type, one of the PKEY_KEYTYPE values */
+ __u32 len; /* bytes actually stored in protkey[] */
+ __u8 protkey[MAXPROTKEYSIZE]; /* the protected key blob */
+};
+
+/* Struct to hold a clear key value */
+struct pkey_clrkey {
+ __u8 clrkey[MAXCLRKEYSIZE]; /* 16, 24, or 32 byte clear key value */
+};
+
+/*
+ * Generate secure key
+ */
+struct pkey_genseck {
+ __u16 cardnr; /* in: card to use or FFFF for any */
+ __u16 domain; /* in: domain or FFFF for any */
+ __u32 keytype; /* in: key type to generate */
+ struct pkey_seckey seckey; /* out: the secure key blob */
+};
+#define PKEY_GENSECK _IOWR(PKEY_IOCTL_MAGIC, 0x01, struct pkey_genseck)
+
+/*
+ * Construct secure key from clear key value
+ */
+struct pkey_clr2seck {
+ __u16 cardnr; /* in: card to use or FFFF for any */
+ __u16 domain; /* in: domain or FFFF for any */
+ __u32 keytype; /* in: key type to generate */
+ struct pkey_clrkey clrkey; /* in: the clear key value */
+ struct pkey_seckey seckey; /* out: the secure key blob */
+};
+#define PKEY_CLR2SECK _IOWR(PKEY_IOCTL_MAGIC, 0x02, struct pkey_clr2seck)
+
+/*
+ * Fabricate protected key from a secure key
+ */
+struct pkey_sec2protk {
+ __u16 cardnr; /* in: card to use or FFFF for any */
+ __u16 domain; /* in: domain or FFFF for any */
+ struct pkey_seckey seckey; /* in: the secure key blob */
+ struct pkey_protkey protkey; /* out: the protected key */
+};
+#define PKEY_SEC2PROTK _IOWR(PKEY_IOCTL_MAGIC, 0x03, struct pkey_sec2protk)
+
+/*
+ * Fabricate protected key from an clear key value
+ */
+struct pkey_clr2protk {
+ __u32 keytype; /* in: key type to generate */
+ struct pkey_clrkey clrkey; /* in: the clear key value */
+ struct pkey_protkey protkey; /* out: the protected key */
+};
+#define PKEY_CLR2PROTK _IOWR(PKEY_IOCTL_MAGIC, 0x04, struct pkey_clr2protk)
+
+/*
+ * Search for matching crypto card based on the Master Key
+ * Verification Pattern provided inside a secure key.
+ */
+struct pkey_findcard {
+ struct pkey_seckey seckey; /* in: the secure key blob */
+ __u16 cardnr; /* out: card number */
+ __u16 domain; /* out: domain number */
+};
+#define PKEY_FINDCARD _IOWR(PKEY_IOCTL_MAGIC, 0x05, struct pkey_findcard)
+
+/*
+ * Combined together: findcard + sec2prot
+ */
+struct pkey_skey2pkey {
+ struct pkey_seckey seckey; /* in: the secure key blob */
+ struct pkey_protkey protkey; /* out: the protected key */
+};
+#define PKEY_SKEY2PKEY _IOWR(PKEY_IOCTL_MAGIC, 0x06, struct pkey_skey2pkey)
+
+#endif /* _UAPI_PKEY_H */
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S
index db469fa11462..dff2152350a7 100644
--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@ -50,7 +50,8 @@ _TIF_WORK = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \
_TIF_UPROBE)
_TIF_TRACE = (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | _TIF_SECCOMP | \
_TIF_SYSCALL_TRACEPOINT)
-_CIF_WORK = (_CIF_MCCK_PENDING | _CIF_ASCE | _CIF_FPU)
+_CIF_WORK = (_CIF_MCCK_PENDING | _CIF_ASCE_PRIMARY | \
+ _CIF_ASCE_SECONDARY | _CIF_FPU)
_PIF_WORK = (_PIF_PER_TRAP)
#define BASED(name) name-cleanup_critical(%r13)
@@ -339,8 +340,8 @@ ENTRY(system_call)
jo .Lsysc_notify_resume
TSTMSK __LC_CPU_FLAGS,_CIF_FPU
jo .Lsysc_vxrs
- TSTMSK __LC_CPU_FLAGS,_CIF_ASCE
- jo .Lsysc_uaccess
+ TSTMSK __LC_CPU_FLAGS,(_CIF_ASCE_PRIMARY|_CIF_ASCE_SECONDARY)
+ jnz .Lsysc_asce
j .Lsysc_return # beware of critical section cleanup
#
@@ -358,12 +359,15 @@ ENTRY(system_call)
jg s390_handle_mcck # TIF bit will be cleared by handler
#
-# _CIF_ASCE is set, load user space asce
+# _CIF_ASCE_PRIMARY and/or CIF_ASCE_SECONDARY set, load user space asce
#
-.Lsysc_uaccess:
- ni __LC_CPU_FLAGS+7,255-_CIF_ASCE
+.Lsysc_asce:
+ ni __LC_CPU_FLAGS+7,255-_CIF_ASCE_PRIMARY
lctlg %c1,%c1,__LC_USER_ASCE # load primary asce
- j .Lsysc_return
+ TSTMSK __LC_CPU_FLAGS,_CIF_ASCE_SECONDARY
+ jz .Lsysc_return
+ larl %r14,.Lsysc_return
+ jg set_fs_fixup
#
# CIF_FPU is set, restore floating-point controls and floating-point registers.
@@ -661,8 +665,8 @@ ENTRY(io_int_handler)
jo .Lio_notify_resume
TSTMSK __LC_CPU_FLAGS,_CIF_FPU
jo .Lio_vxrs
- TSTMSK __LC_CPU_FLAGS,_CIF_ASCE
- jo .Lio_uaccess
+ TSTMSK __LC_CPU_FLAGS,(_CIF_ASCE_PRIMARY|_CIF_ASCE_SECONDARY)
+ jnz .Lio_asce
j .Lio_return # beware of critical section cleanup
#
@@ -675,12 +679,15 @@ ENTRY(io_int_handler)
j .Lio_return
#
-# _CIF_ASCE is set, load user space asce
+# _CIF_ASCE_PRIMARY and/or CIF_ASCE_SECONDARY set, load user space asce
#
-.Lio_uaccess:
- ni __LC_CPU_FLAGS+7,255-_CIF_ASCE
+.Lio_asce:
+ ni __LC_CPU_FLAGS+7,255-_CIF_ASCE_PRIMARY
lctlg %c1,%c1,__LC_USER_ASCE # load primary asce
- j .Lio_return
+ TSTMSK __LC_CPU_FLAGS,_CIF_ASCE_SECONDARY
+ jz .Lio_return
+ larl %r14,.Lio_return
+ jg set_fs_fixup
#
# CIF_FPU is set, restore floating-point controls and floating-point registers.
diff --git a/arch/s390/kernel/entry.h b/arch/s390/kernel/entry.h
index e79f030dd276..33f901865326 100644
--- a/arch/s390/kernel/entry.h
+++ b/arch/s390/kernel/entry.h
@@ -80,5 +80,6 @@ long sys_s390_pci_mmio_read(unsigned long, void __user *, size_t);
DECLARE_PER_CPU(u64, mt_cycles[8]);
void verify_facilities(void);
+void set_fs_fixup(void);
#endif /* _ENTRY_H */
diff --git a/arch/s390/kernel/nmi.c b/arch/s390/kernel/nmi.c
index 56e14d073167..80c093e0c6f1 100644
--- a/arch/s390/kernel/nmi.c
+++ b/arch/s390/kernel/nmi.c
@@ -116,6 +116,19 @@ static int notrace s390_validate_registers(union mci mci, int umode)
s390_handle_damage();
kill_task = 1;
}
+ /* Validate control registers */
+ if (!mci.cr) {
+ /*
+ * Control registers have unknown contents.
+ * Can't recover and therefore stopping machine.
+ */
+ s390_handle_damage();
+ } else {
+ asm volatile(
+ " lctlg 0,15,0(%0)\n"
+ " ptlb\n"
+ : : "a" (&S390_lowcore.cregs_save_area) : "memory");
+ }
if (!mci.fp) {
/*
* Floating point registers can't be restored. If the
@@ -208,18 +221,6 @@ static int notrace s390_validate_registers(union mci mci, int umode)
*/
kill_task = 1;
}
- /* Validate control registers */
- if (!mci.cr) {
- /*
- * Control registers have unknown contents.
- * Can't recover and therefore stopping machine.
- */
- s390_handle_damage();
- } else {
- asm volatile(
- " lctlg 0,15,0(%0)"
- : : "a" (&S390_lowcore.cregs_save_area) : "memory");
- }
/*
* We don't even try to validate the TOD register, since we simply
* can't write something sensible into that register.
diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c
index c5b86b4a1a8b..54281660582c 100644
--- a/arch/s390/kernel/process.c
+++ b/arch/s390/kernel/process.c
@@ -100,8 +100,8 @@ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
return 0;
}
-int copy_thread(unsigned long clone_flags, unsigned long new_stackp,
- unsigned long arg, struct task_struct *p)
+int copy_thread_tls(unsigned long clone_flags, unsigned long new_stackp,
+ unsigned long arg, struct task_struct *p, unsigned long tls)
{
struct fake_frame
{
@@ -156,7 +156,6 @@ int copy_thread(unsigned long clone_flags, unsigned long new_stackp,
/* Set a new TLS ? */
if (clone_flags & CLONE_SETTLS) {
- unsigned long tls = frame->childregs.gprs[6];
if (is_compat_task()) {
p->thread.acrs[0] = (unsigned int)tls;
} else {
@@ -234,3 +233,16 @@ unsigned long arch_randomize_brk(struct mm_struct *mm)
ret = PAGE_ALIGN(mm->brk + brk_rnd());
return (ret > mm->brk) ? ret : mm->brk;
}
+
+void set_fs_fixup(void)
+{
+ struct pt_regs *regs = current_pt_regs();
+ static bool warned;
+
+ set_fs(USER_DS);
+ if (warned)
+ return;
+ WARN(1, "Unbalanced set_fs - int code: 0x%x\n", regs->int_code);
+ show_registers(regs);
+ warned = true;
+}
diff --git a/arch/s390/mm/gmap.c b/arch/s390/mm/gmap.c
index 59ac93714fa4..a07b1ec1391d 100644
--- a/arch/s390/mm/gmap.c
+++ b/arch/s390/mm/gmap.c
@@ -359,8 +359,8 @@ static int __gmap_unlink_by_vmaddr(struct gmap *gmap, unsigned long vmaddr)
spin_lock(&gmap->guest_table_lock);
entry = radix_tree_delete(&gmap->host_to_guest, vmaddr >> PMD_SHIFT);
if (entry) {
- flush = (*entry != _SEGMENT_ENTRY_INVALID);
- *entry = _SEGMENT_ENTRY_INVALID;
+ flush = (*entry != _SEGMENT_ENTRY_EMPTY);
+ *entry = _SEGMENT_ENTRY_EMPTY;
}
spin_unlock(&gmap->guest_table_lock);
return flush;
@@ -589,7 +589,7 @@ int __gmap_link(struct gmap *gmap, unsigned long gaddr, unsigned long vmaddr)
return rc;
ptl = pmd_lock(mm, pmd);
spin_lock(&gmap->guest_table_lock);
- if (*table == _SEGMENT_ENTRY_INVALID) {
+ if (*table == _SEGMENT_ENTRY_EMPTY) {
rc = radix_tree_insert(&gmap->host_to_guest,
vmaddr >> PMD_SHIFT, table);
if (!rc)
diff --git a/arch/s390/mm/hugetlbpage.c b/arch/s390/mm/hugetlbpage.c
index a03816227719..9b4050caa4e9 100644
--- a/arch/s390/mm/hugetlbpage.c
+++ b/arch/s390/mm/hugetlbpage.c
@@ -62,7 +62,7 @@ static inline unsigned long __pte_to_rste(pte_t pte)
rste |= move_set_bit(pte_val(pte), _PAGE_NOEXEC,
_SEGMENT_ENTRY_NOEXEC);
} else
- rste = _SEGMENT_ENTRY_INVALID;
+ rste = _SEGMENT_ENTRY_EMPTY;
return rste;
}
diff --git a/drivers/crypto/Kconfig b/drivers/crypto/Kconfig
index 2cac445b02fd..0b49dbc423e2 100644
--- a/drivers/crypto/Kconfig
+++ b/drivers/crypto/Kconfig
@@ -62,19 +62,32 @@ config CRYPTO_DEV_GEODE
will be called geode-aes.
config ZCRYPT
- tristate "Support for PCI-attached cryptographic adapters"
+ tristate "Support for s390 cryptographic adapters"
depends on S390
select HW_RANDOM
help
- Select this option if you want to use a PCI-attached cryptographic
- adapter like:
- + PCI Cryptographic Accelerator (PCICA)
- + PCI Cryptographic Coprocessor (PCICC)
+ Select this option if you want to enable support for
+ s390 cryptographic adapters like:
+ PCI-X Cryptographic Coprocessor (PCIXCC)
- + Crypto Express2 Coprocessor (CEX2C)
- + Crypto Express2 Accelerator (CEX2A)
- + Crypto Express3 Coprocessor (CEX3C)
- + Crypto Express3 Accelerator (CEX3A)
+ + Crypto Express 2,3,4 or 5 Coprocessor (CEXxC)
+ + Crypto Express 2,3,4 or 5 Accelerator (CEXxA)
+ + Crypto Express 4 or 5 EP11 Coprocessor (CEXxP)
+
+config PKEY
+ tristate "Kernel API for protected key handling"
+ depends on S390
+ depends on ZCRYPT
+ help
+ With this option enabled the pkey kernel module provides an API
+ for creation and handling of protected keys. Other parts of the
+ kernel or userspace applications may use these functions.
+
+ Select this option if you want to enable the kernel and userspace
+ API for proteced key handling.
+
+ Please note that creation of protected keys from secure keys
+ requires to have at least one CEX card in coprocessor mode
+ available at runtime.
config CRYPTO_SHA1_S390
tristate "SHA1 digest algorithm"
@@ -124,6 +137,7 @@ config CRYPTO_AES_S390
depends on S390
select CRYPTO_ALGAPI
select CRYPTO_BLKCIPHER
+ select PKEY
help
This is the s390 hardware accelerated implementation of the
AES cipher algorithms (FIPS-197).
diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c
index 0f1713727d4c..0b38217f8147 100644
--- a/drivers/s390/block/dasd_eckd.c
+++ b/drivers/s390/block/dasd_eckd.c
@@ -4864,7 +4864,7 @@ static void dasd_eckd_dump_sense_tcw(struct dasd_device *device,
break;
case 3: /* tsa_intrg */
len += sprintf(page + len, PRINTK_HEADER
- " tsb->tsa.intrg.: not supportet yet\n");
+ " tsb->tsa.intrg.: not supported yet\n");
break;
}
diff --git a/drivers/s390/cio/ioasm.c b/drivers/s390/cio/ioasm.c
index 8225da619014..4182f60124da 100644
--- a/drivers/s390/cio/ioasm.c
+++ b/drivers/s390/cio/ioasm.c
@@ -165,13 +165,15 @@ int tpi(struct tpi_info *addr)
int chsc(void *chsc_area)
{
typedef struct { char _[4096]; } addr_type;
- int cc;
+ int cc = -EIO;
asm volatile(
" .insn rre,0xb25f0000,%2,0\n"
- " ipm %0\n"
+ "0: ipm %0\n"
" srl %0,28\n"
- : "=d" (cc), "=m" (*(addr_type *) chsc_area)
+ "1:\n"
+ EX_TABLE(0b, 1b)
+ : "+d" (cc), "=m" (*(addr_type *) chsc_area)
: "d" (chsc_area), "m" (*(addr_type *) chsc_area)
: "cc");
trace_s390_cio_chsc(chsc_area, cc);
diff --git a/drivers/s390/crypto/Makefile b/drivers/s390/crypto/Makefile
index 0a7fb83f35e5..be36f1010d75 100644
--- a/drivers/s390/crypto/Makefile
+++ b/drivers/s390/crypto/Makefile
@@ -10,3 +10,7 @@ zcrypt-objs += zcrypt_msgtype6.o zcrypt_msgtype50.o
obj-$(CONFIG_ZCRYPT) += zcrypt.o
# adapter drivers depend on ap.o and zcrypt.o
obj-$(CONFIG_ZCRYPT) += zcrypt_pcixcc.o zcrypt_cex2a.o zcrypt_cex4.o
+
+# pkey kernel module
+pkey-objs := pkey_api.o
+obj-$(CONFIG_PKEY) += pkey.o
diff --git a/drivers/s390/crypto/ap_bus.c b/drivers/s390/crypto/ap_bus.c
index 56db76c05775..9be4596d8a08 100644
--- a/drivers/s390/crypto/ap_bus.c
+++ b/drivers/s390/crypto/ap_bus.c
@@ -1107,16 +1107,6 @@ static void ap_config_timeout(unsigned long ptr)
queue_work(system_long_wq, &ap_scan_work);
}
-static void ap_reset_domain(void)
-{
- int i;
-
- if (ap_domain_index == -1 || !ap_test_config_domain(ap_domain_index))
- return;
- for (i = 0; i < AP_DEVICES; i++)
- ap_rapq(AP_MKQID(i, ap_domain_index));
-}
-
static void ap_reset_all(void)
{
int i, j;
diff --git a/drivers/s390/crypto/ap_card.c b/drivers/s390/crypto/ap_card.c
index 1cd9128593e4..cfa161ccc74e 100644
--- a/drivers/s390/crypto/ap_card.c
+++ b/drivers/s390/crypto/ap_card.c
@@ -58,9 +58,9 @@ static ssize_t ap_functions_show(struct device *dev,
static DEVICE_ATTR(ap_functions, 0444, ap_functions_show, NULL);
-static ssize_t ap_request_count_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
+static ssize_t ap_req_count_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
{
struct ap_card *ac = to_ap_card(dev);
unsigned int req_cnt;
@@ -72,7 +72,23 @@ static ssize_t ap_request_count_show(struct device *dev,
return snprintf(buf, PAGE_SIZE, "%d\n", req_cnt);
}
-static DEVICE_ATTR(request_count, 0444, ap_request_count_show, NULL);
+static ssize_t ap_req_count_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct ap_card *ac = to_ap_card(dev);
+ struct ap_queue *aq;
+
+ spin_lock_bh(&ap_list_lock);
+ for_each_ap_queue(aq, ac)
+ aq->total_request_count = 0;
+ spin_unlock_bh(&ap_list_lock);
+ atomic_set(&ac->total_request_count, 0);
+
+ return count;
+}
+
+static DEVICE_ATTR(request_count, 0644, ap_req_count_show, ap_req_count_store);
static ssize_t ap_requestq_count_show(struct device *dev,
struct device_attribute *attr, char *buf)
diff --git a/drivers/s390/crypto/ap_queue.c b/drivers/s390/crypto/ap_queue.c
index 7be67fa9f224..480c58a63769 100644
--- a/drivers/s390/crypto/ap_queue.c
+++ b/drivers/s390/crypto/ap_queue.c
@@ -459,9 +459,9 @@ EXPORT_SYMBOL(ap_queue_resume);
/*
* AP queue related attributes.
*/
-static ssize_t ap_request_count_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
+static ssize_t ap_req_count_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
{
struct ap_queue *aq = to_ap_queue(dev);
unsigned int req_cnt;
@@ -472,7 +472,20 @@ static ssize_t ap_request_count_show(struct device *dev,
return snprintf(buf, PAGE_SIZE, "%d\n", req_cnt);
}
-static DEVICE_ATTR(request_count, 0444, ap_request_count_show, NULL);
+static ssize_t ap_req_count_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct ap_queue *aq = to_ap_queue(dev);
+
+ spin_lock_bh(&aq->lock);
+ aq->total_request_count = 0;
+ spin_unlock_bh(&aq->lock);
+
+ return count;
+}
+
+static DEVICE_ATTR(request_count, 0644, ap_req_count_show, ap_req_count_store);
static ssize_t ap_requestq_count_show(struct device *dev,
struct device_attribute *attr, char *buf)
diff --git a/drivers/s390/crypto/pkey_api.c b/drivers/s390/crypto/pkey_api.c
new file mode 100644
index 000000000000..40f1136f5568
--- /dev/null
+++ b/drivers/s390/crypto/pkey_api.c
@@ -0,0 +1,1148 @@
+/*
+ * pkey device driver
+ *
+ * Copyright IBM Corp. 2017
+ * Author(s): Harald Freudenberger
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License (version 2 only)
+ * as published by the Free Software Foundation.
+ *
+ */
+
+#define KMSG_COMPONENT "pkey"
+#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/miscdevice.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/kallsyms.h>
+#include <linux/debugfs.h>
+#include <asm/zcrypt.h>
+#include <asm/cpacf.h>
+#include <asm/pkey.h>
+
+#include "zcrypt_api.h"
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("IBM Corporation");
+MODULE_DESCRIPTION("s390 protected key interface");
+
+/* Size of parameter block used for all cca requests/replies */
+#define PARMBSIZE 512
+
+/* Size of vardata block used for some of the cca requests/replies */
+#define VARDATASIZE 4096
+
+/*
+ * debug feature data and functions
+ */
+
+static debug_info_t *debug_info;
+
+#define DEBUG_DBG(...) debug_sprintf_event(debug_info, 6, ##__VA_ARGS__)
+#define DEBUG_INFO(...) debug_sprintf_event(debug_info, 5, ##__VA_ARGS__)
+#define DEBUG_WARN(...) debug_sprintf_event(debug_info, 4, ##__VA_ARGS__)
+#define DEBUG_ERR(...) debug_sprintf_event(debug_info, 3, ##__VA_ARGS__)
+
+static void __init pkey_debug_init(void)
+{
+ debug_info = debug_register("pkey", 1, 1, 4 * sizeof(long));
+ debug_register_view(debug_info, &debug_sprintf_view);
+ debug_set_level(debug_info, 3);
+}
+
+static void __exit pkey_debug_exit(void)
+{
+ debug_unregister(debug_info);
+}
+
+/* inside view of a secure key token (only type 0x01 version 0x04) */
+struct secaeskeytoken {
+ u8 type; /* 0x01 for internal key token */
+ u8 res0[3];
+ u8 version; /* should be 0x04 */
+ u8 res1[1];
+ u8 flag; /* key flags */
+ u8 res2[1];
+ u64 mkvp; /* master key verification pattern */
+ u8 key[32]; /* key value (encrypted) */
+ u8 cv[8]; /* control vector */
+ u16 bitsize; /* key bit size */
+ u16 keysize; /* key byte size */
+ u8 tvv[4]; /* token validation value */
+} __packed;
+
+/*
+ * Simple check if the token is a valid CCA secure AES key
+ * token. If keybitsize is given, the bitsize of the key is
+ * also checked. Returns 0 on success or errno value on failure.
+ */
+static int check_secaeskeytoken(u8 *token, int keybitsize)
+{
+ struct secaeskeytoken *t = (struct secaeskeytoken *) token;
+
+ if (t->type != 0x01) {
+ DEBUG_ERR(
+ "check_secaeskeytoken secure token check failed, type mismatch 0x%02x != 0x01\n",
+ (int) t->type);
+ return -EINVAL;
+ }
+ if (t->version != 0x04) {
+ DEBUG_ERR(
+ "check_secaeskeytoken secure token check failed, version mismatch 0x%02x != 0x04\n",
+ (int) t->version);
+ return -EINVAL;
+ }
+ if (keybitsize > 0 && t->bitsize != keybitsize) {
+ DEBUG_ERR(
+ "check_secaeskeytoken secure token check failed, bitsize mismatch %d != %d\n",
+ (int) t->bitsize, keybitsize);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/*
+ * Allocate consecutive memory for request CPRB, request param
+ * block, reply CPRB and reply param block and fill in values
+ * for the common fields. Returns 0 on success or errno value
+ * on failure.
+ */
+static int alloc_and_prep_cprbmem(size_t paramblen,
+ u8 **pcprbmem,
+ struct CPRBX **preqCPRB,
+ struct CPRBX **prepCPRB)
+{
+ u8 *cprbmem;
+ size_t cprbplusparamblen = sizeof(struct CPRBX) + paramblen;
+ struct CPRBX *preqcblk, *prepcblk;
+
+ /*
+ * allocate consecutive memory for request CPRB, request param
+ * block, reply CPRB and reply param block
+ */
+ cprbmem = kmalloc(2 * cprbplusparamblen, GFP_KERNEL);
+ if (!cprbmem)
+ return -ENOMEM;
+ memset(cprbmem, 0, 2 * cprbplusparamblen);
+
+ preqcblk = (struct CPRBX *) cprbmem;
+ prepcblk = (struct CPRBX *) (cprbmem + cprbplusparamblen);
+
+ /* fill request cprb struct */
+ preqcblk->cprb_len = sizeof(struct CPRBX);
+ preqcblk->cprb_ver_id = 0x02;
+ memcpy(preqcblk->func_id, "T2", 2);
+ preqcblk->rpl_msgbl = cprbplusparamblen;
+ if (paramblen) {
+ preqcblk->req_parmb =
+ ((u8 *) preqcblk) + sizeof(struct CPRBX);
+ preqcblk->rpl_parmb =
+ ((u8 *) prepcblk) + sizeof(struct CPRBX);
+ }
+
+ *pcprbmem = cprbmem;
+ *preqCPRB = preqcblk;
+ *prepCPRB = prepcblk;
+
+ return 0;
+}
+
+/*
+ * Free the cprb memory allocated with the function above.
+ * If the scrub value is not zero, the memory is filled
+ * with zeros before freeing (useful if there was some
+ * clear key material in there).
+ */
+static void free_cprbmem(void *mem, size_t paramblen, int scrub)
+{
+ if (scrub)
+ memzero_explicit(mem, 2 * (sizeof(struct CPRBX) + paramblen));
+ kfree(mem);
+}
+
+/*
+ * Helper function to prepare the xcrb struct
+ */
+static inline void prep_xcrb(struct ica_xcRB *pxcrb,
+ u16 cardnr,
+ struct CPRBX *preqcblk,
+ struct CPRBX *prepcblk)
+{
+ memset(pxcrb, 0, sizeof(*pxcrb));
+ pxcrb->agent_ID = 0x4341; /* 'CA' */
+ pxcrb->user_defined = (cardnr == 0xFFFF ? AUTOSELECT : cardnr);
+ pxcrb->request_control_blk_length =
+ preqcblk->cprb_len + preqcblk->req_parml;
+ pxcrb->request_control_blk_addr = (void *) preqcblk;
+ pxcrb->reply_control_blk_length = preqcblk->rpl_msgbl;
+ pxcrb->reply_control_blk_addr = (void *) prepcblk;
+}
+
+/*
+ * Helper function which calls zcrypt_send_cprb with
+ * memory management segment adjusted to kernel space
+ * so that the copy_from_user called within this
+ * function do in fact copy from kernel space.
+ */
+static inline int _zcrypt_send_cprb(struct ica_xcRB *xcrb)
+{
+ int rc;
+ mm_segment_t old_fs = get_fs();
+
+ set_fs(KERNEL_DS);
+ rc = zcrypt_send_cprb(xcrb);
+ set_fs(old_fs);
+
+ return rc;
+}
+
+/*
+ * Generate (random) AES secure key.
+ */
+int pkey_genseckey(u16 cardnr, u16 domain,
+ u32 keytype, struct pkey_seckey *seckey)
+{
+ int i, rc, keysize;
+ int seckeysize;
+ u8 *mem;
+ struct CPRBX *preqcblk, *prepcblk;
+ struct ica_xcRB xcrb;
+ struct kgreqparm {
+ u8 subfunc_code[2];
+ u16 rule_array_len;
+ struct lv1 {
+ u16 len;
+ char key_form[8];
+ char key_length[8];
+ char key_type1[8];
+ char key_type2[8];
+ } lv1;
+ struct lv2 {
+ u16 len;
+ struct keyid {
+ u16 len;
+ u16 attr;
+ u8 data[SECKEYBLOBSIZE];
+ } keyid[6];
+ } lv2;
+ } *preqparm;
+ struct kgrepparm {
+ u8 subfunc_code[2];
+ u16 rule_array_len;
+ struct lv3 {
+ u16 len;
+ u16 keyblocklen;
+ struct {
+ u16 toklen;
+ u16 tokattr;
+ u8 tok[0];
+ /* ... some more data ... */
+ } keyblock;
+ } lv3;
+ } *prepparm;
+
+ /* get already prepared memory for 2 cprbs with param block each */
+ rc = alloc_and_prep_cprbmem(PARMBSIZE, &mem, &preqcblk, &prepcblk);
+ if (rc)
+ return rc;
+
+ /* fill request cprb struct */
+ preqcblk->domain = domain;
+
+ /* fill request cprb param block with KG request */
+ preqparm = (struct kgreqparm *) preqcblk->req_parmb;
+ memcpy(preqparm->subfunc_code, "KG", 2);
+ preqparm->rule_array_len = sizeof(preqparm->rule_array_len);
+ preqparm->lv1.len = sizeof(struct lv1);
+ memcpy(preqparm->lv1.key_form, "OP ", 8);
+ switch (keytype) {
+ case PKEY_KEYTYPE_AES_128:
+ keysize = 16;
+ memcpy(preqparm->lv1.key_length, "KEYLN16 ", 8);
+ break;
+ case PKEY_KEYTYPE_AES_192:
+ keysize = 24;
+ memcpy(preqparm->lv1.key_length, "KEYLN24 ", 8);
+ break;
+ case PKEY_KEYTYPE_AES_256:
+ keysize = 32;
+ memcpy(preqparm->lv1.key_length, "KEYLN32 ", 8);
+ break;
+ default:
+ DEBUG_ERR(
+ "pkey_genseckey unknown/unsupported keytype %d\n",
+ keytype);
+ rc = -EINVAL;
+ goto out;
+ }
+ memcpy(preqparm->lv1.key_type1, "AESDATA ", 8);
+ preqparm->lv2.len = sizeof(struct lv2);
+ for (i = 0; i < 6; i++) {
+ preqparm->lv2.keyid[i].len = sizeof(struct keyid);
+ preqparm->lv2.keyid[i].attr = (i == 2 ? 0x30 : 0x10);
+ }
+ preqcblk->req_parml = sizeof(struct kgreqparm);
+
+ /* fill xcrb struct */
+ prep_xcrb(&xcrb, cardnr, preqcblk, prepcblk);
+
+ /* forward xcrb with request CPRB and reply CPRB to zcrypt dd */
+ rc = _zcrypt_send_cprb(&xcrb);
+ if (rc) {
+ DEBUG_ERR(
+ "pkey_genseckey zcrypt_send_cprb (cardnr=%d domain=%d) failed with errno %d\n",
+ (int) cardnr, (int) domain, rc);
+ goto out;
+ }
+
+ /* check response returncode and reasoncode */
+ if (prepcblk->ccp_rtcode != 0) {
+ DEBUG_ERR(
+ "pkey_genseckey secure key generate failure, card response %d/%d\n",
+ (int) prepcblk->ccp_rtcode,
+ (int) prepcblk->ccp_rscode);
+ rc = -EIO;
+ goto out;
+ }
+
+ /* process response cprb param block */
+ prepcblk->rpl_parmb = ((u8 *) prepcblk) + sizeof(struct CPRBX);
+ prepparm = (struct kgrepparm *) prepcblk->rpl_parmb;
+
+ /* check length of the returned secure key token */
+ seckeysize = prepparm->lv3.keyblock.toklen
+ - sizeof(prepparm->lv3.keyblock.toklen)
+ - sizeof(prepparm->lv3.keyblock.tokattr);
+ if (seckeysize != SECKEYBLOBSIZE) {
+ DEBUG_ERR(
+ "pkey_genseckey secure token size mismatch %d != %d bytes\n",
+ seckeysize, SECKEYBLOBSIZE);
+ rc = -EIO;
+ goto out;
+ }
+
+ /* check secure key token */
+ rc = check_secaeskeytoken(prepparm->lv3.keyblock.tok, 8*keysize);
+ if (rc) {
+ rc = -EIO;
+ goto out;
+ }
+
+ /* copy the generated secure key token */
+ memcpy(seckey->seckey, prepparm->lv3.keyblock.tok, SECKEYBLOBSIZE);
+
+out:
+ free_cprbmem(mem, PARMBSIZE, 0);
+ return rc;
+}
+EXPORT_SYMBOL(pkey_genseckey);
+
+/*
+ * Generate an AES secure key with given key value.
+ */
+int pkey_clr2seckey(u16 cardnr, u16 domain, u32 keytype,
+ const struct pkey_clrkey *clrkey,
+ struct pkey_seckey *seckey)
+{
+ int rc, keysize, seckeysize;
+ u8 *mem;
+ struct CPRBX *preqcblk, *prepcblk;
+ struct ica_xcRB xcrb;
+ struct cmreqparm {
+ u8 subfunc_code[2];
+ u16 rule_array_len;
+ char rule_array[8];
+ struct lv1 {
+ u16 len;
+ u8 clrkey[0];
+ } lv1;
+ struct lv2 {
+ u16 len;
+ struct keyid {
+ u16 len;
+ u16 attr;
+ u8 data[SECKEYBLOBSIZE];
+ } keyid;
+ } lv2;
+ } *preqparm;
+ struct lv2 *plv2;
+ struct cmrepparm {
+ u8 subfunc_code[2];
+ u16 rule_array_len;
+ struct lv3 {
+ u16 len;
+ u16 keyblocklen;
+ struct {
+ u16 toklen;
+ u16 tokattr;
+ u8 tok[0];
+ /* ... some more data ... */
+ } keyblock;
+ } lv3;
+ } *prepparm;
+
+ /* get already prepared memory for 2 cprbs with param block each */
+ rc = alloc_and_prep_cprbmem(PARMBSIZE, &mem, &preqcblk, &prepcblk);
+ if (rc)
+ return rc;
+
+ /* fill request cprb struct */
+ preqcblk->domain = domain;
+
+ /* fill request cprb param block with CM request */
+ preqparm = (struct cmreqparm *) preqcblk->req_parmb;
+ memcpy(preqparm->subfunc_code, "CM", 2);
+ memcpy(preqparm->rule_array, "AES ", 8);
+ preqparm->rule_array_len =
+ sizeof(preqparm->rule_array_len) + sizeof(preqparm->rule_array);
+ switch (keytype) {
+ case PKEY_KEYTYPE_AES_128:
+ keysize = 16;
+ break;
+ case PKEY_KEYTYPE_AES_192:
+ keysize = 24;
+ break;
+ case PKEY_KEYTYPE_AES_256:
+ keysize = 32;
+ break;
+ default:
+ DEBUG_ERR(
+ "pkey_clr2seckey unknown/unsupported keytype %d\n",
+ keytype);
+ rc = -EINVAL;
+ goto out;
+ }
+ preqparm->lv1.len = sizeof(struct lv1) + keysize;
+ memcpy(preqparm->lv1.clrkey, clrkey->clrkey, keysize);
+ plv2 = (struct lv2 *) (((u8 *) &preqparm->lv2) + keysize);
+ plv2->len = sizeof(struct lv2);
+ plv2->keyid.len = sizeof(struct keyid);
+ plv2->keyid.attr = 0x30;
+ preqcblk->req_parml = sizeof(struct cmreqparm) + keysize;
+
+ /* fill xcrb struct */
+ prep_xcrb(&xcrb, cardnr, preqcblk, prepcblk);
+
+ /* forward xcrb with request CPRB and reply CPRB to zcrypt dd */
+ rc = _zcrypt_send_cprb(&xcrb);
+ if (rc) {
+ DEBUG_ERR(
+ "pkey_clr2seckey zcrypt_send_cprb (cardnr=%d domain=%d) failed with errno %d\n",
+ (int) cardnr, (int) domain, rc);
+ goto out;
+ }
+
+ /* check response returncode and reasoncode */
+ if (prepcblk->ccp_rtcode != 0) {
+ DEBUG_ERR(
+ "pkey_clr2seckey clear key import failure, card response %d/%d\n",
+ (int) prepcblk->ccp_rtcode,
+ (int) prepcblk->ccp_rscode);
+ rc = -EIO;
+ goto out;
+ }
+
+ /* process response cprb param block */
+ prepcblk->rpl_parmb = ((u8 *) prepcblk) + sizeof(struct CPRBX);
+ prepparm = (struct cmrepparm *) prepcblk->rpl_parmb;
+
+ /* check length of the returned secure key token */
+ seckeysize = prepparm->lv3.keyblock.toklen
+ - sizeof(prepparm->lv3.keyblock.toklen)
+ - sizeof(prepparm->lv3.keyblock.tokattr);
+ if (seckeysize != SECKEYBLOBSIZE) {
+ DEBUG_ERR(
+ "pkey_clr2seckey secure token size mismatch %d != %d bytes\n",
+ seckeysize, SECKEYBLOBSIZE);
+ rc = -EIO;
+ goto out;
+ }
+
+ /* check secure key token */
+ rc = check_secaeskeytoken(prepparm->lv3.keyblock.tok, 8*keysize);
+ if (rc) {
+ rc = -EIO;
+ goto out;
+ }
+
+ /* copy the generated secure key token */
+ memcpy(seckey->seckey, prepparm->lv3.keyblock.tok, SECKEYBLOBSIZE);
+
+out:
+ free_cprbmem(mem, PARMBSIZE, 1);
+ return rc;
+}
+EXPORT_SYMBOL(pkey_clr2seckey);
+
+/*
+ * Derive a proteced key from the secure key blob.
+ */
+int pkey_sec2protkey(u16 cardnr, u16 domain,
+ const struct pkey_seckey *seckey,
+ struct pkey_protkey *protkey)
+{
+ int rc;
+ u8 *mem;
+ struct CPRBX *preqcblk, *prepcblk;
+ struct ica_xcRB xcrb;
+ struct uskreqparm {
+ u8 subfunc_code[2];
+ u16 rule_array_len;
+ struct lv1 {
+ u16 len;
+ u16 attr_len;
+ u16 attr_flags;
+ } lv1;
+ struct lv2 {
+ u16 len;
+ u16 attr_len;
+ u16 attr_flags;
+ u8 token[0]; /* cca secure key token */
+ } lv2 __packed;
+ } *preqparm;
+ struct uskrepparm {
+ u8 subfunc_code[2];
+ u16 rule_array_len;
+ struct lv3 {
+ u16 len;
+ u16 attr_len;
+ u16 attr_flags;
+ struct cpacfkeyblock {
+ u8 version; /* version of this struct */
+ u8 flags[2];
+ u8 algo;
+ u8 form;
+ u8 pad1[3];
+ u16 keylen;
+ u8 key[64]; /* the key (keylen bytes) */
+ u16 keyattrlen;
+ u8 keyattr[32];
+ u8 pad2[1];
+ u8 vptype;
+ u8 vp[32]; /* verification pattern */
+ } keyblock;
+ } lv3 __packed;
+ } *prepparm;
+
+ /* get already prepared memory for 2 cprbs with param block each */
+ rc = alloc_and_prep_cprbmem(PARMBSIZE, &mem, &preqcblk, &prepcblk);
+ if (rc)
+ return rc;
+
+ /* fill request cprb struct */
+ preqcblk->domain = domain;
+
+ /* fill request cprb param block with USK request */
+ preqparm = (struct uskreqparm *) preqcblk->req_parmb;
+ memcpy(preqparm->subfunc_code, "US", 2);
+ preqparm->rule_array_len = sizeof(preqparm->rule_array_len);
+ preqparm->lv1.len = sizeof(struct lv1);
+ preqparm->lv1.attr_len = sizeof(struct lv1) - sizeof(preqparm->lv1.len);
+ preqparm->lv1.attr_flags = 0x0001;
+ preqparm->lv2.len = sizeof(struct lv2) + SECKEYBLOBSIZE;
+ preqparm->lv2.attr_len = sizeof(struct lv2)
+ - sizeof(preqparm->lv2.len) + SECKEYBLOBSIZE;
+ preqparm->lv2.attr_flags = 0x0000;
+ memcpy(preqparm->lv2.token, seckey->seckey, SECKEYBLOBSIZE);
+ preqcblk->req_parml = sizeof(struct uskreqparm) + SECKEYBLOBSIZE;
+
+ /* fill xcrb struct */
+ prep_xcrb(&xcrb, cardnr, preqcblk, prepcblk);
+
+ /* forward xcrb with request CPRB and reply CPRB to zcrypt dd */
+ rc = _zcrypt_send_cprb(&xcrb);
+ if (rc) {
+ DEBUG_ERR(
+ "pkey_sec2protkey zcrypt_send_cprb (cardnr=%d domain=%d) failed with errno %d\n",
+ (int) cardnr, (int) domain, rc);
+ goto out;
+ }
+
+ /* check response returncode and reasoncode */
+ if (prepcblk->ccp_rtcode != 0) {
+ DEBUG_ERR(
+ "pkey_sec2protkey unwrap secure key failure, card response %d/%d\n",
+ (int) prepcblk->ccp_rtcode,
+ (int) prepcblk->ccp_rscode);
+ rc = -EIO;
+ goto out;
+ }
+
+ /* process response cprb param block */
+ prepcblk->rpl_parmb = ((u8 *) prepcblk) + sizeof(struct CPRBX);
+ prepparm = (struct uskrepparm *) prepcblk->rpl_parmb;
+
+ /* check the returned keyblock */
+ if (prepparm->lv3.keyblock.version != 0x01) {
+ DEBUG_ERR(
+ "pkey_sec2protkey reply param keyblock version mismatch 0x%02x != 0x01\n",
+ (int) prepparm->lv3.keyblock.version);
+ rc = -EIO;
+ goto out;
+ }
+
+ /* copy the tanslated protected key */
+ switch (prepparm->lv3.keyblock.keylen) {
+ case 16+32:
+ protkey->type = PKEY_KEYTYPE_AES_128;
+ break;
+ case 24+32:
+ protkey->type = PKEY_KEYTYPE_AES_192;
+ break;
+ case 32+32:
+ protkey->type = PKEY_KEYTYPE_AES_256;
+ break;
+ default:
+ DEBUG_ERR("pkey_sec2protkey unknown/unsupported keytype %d\n",
+ prepparm->lv3.keyblock.keylen);
+ rc = -EIO;
+ goto out;
+ }
+ protkey->len = prepparm->lv3.keyblock.keylen;
+ memcpy(protkey->protkey, prepparm->lv3.keyblock.key, protkey->len);
+
+out:
+ free_cprbmem(mem, PARMBSIZE, 0);
+ return rc;
+}
+EXPORT_SYMBOL(pkey_sec2protkey);
+
+/*
+ * Create a protected key from a clear key value.
+ */
+int pkey_clr2protkey(u32 keytype,
+ const struct pkey_clrkey *clrkey,
+ struct pkey_protkey *protkey)
+{
+ long fc;
+ int keysize;
+ u8 paramblock[64];
+
+ switch (keytype) {
+ case PKEY_KEYTYPE_AES_128:
+ keysize = 16;
+ fc = CPACF_PCKMO_ENC_AES_128_KEY;
+ break;
+ case PKEY_KEYTYPE_AES_192:
+ keysize = 24;
+ fc = CPACF_PCKMO_ENC_AES_192_KEY;
+ break;
+ case PKEY_KEYTYPE_AES_256:
+ keysize = 32;
+ fc = CPACF_PCKMO_ENC_AES_256_KEY;
+ break;
+ default:
+ DEBUG_ERR("pkey_clr2protkey unknown/unsupported keytype %d\n",
+ keytype);
+ return -EINVAL;
+ }
+
+ /* prepare param block */
+ memset(paramblock, 0, sizeof(paramblock));
+ memcpy(paramblock, clrkey->clrkey, keysize);
+
+ /* call the pckmo instruction */
+ cpacf_pckmo(fc, paramblock);
+
+ /* copy created protected key */
+ protkey->type = keytype;
+ protkey->len = keysize + 32;
+ memcpy(protkey->protkey, paramblock, keysize + 32);
+
+ return 0;
+}
+EXPORT_SYMBOL(pkey_clr2protkey);
+
+/*
+ * query cryptographic facility from adapter
+ */
+static int query_crypto_facility(u16 cardnr, u16 domain,
+ const char *keyword,
+ u8 *rarray, size_t *rarraylen,
+ u8 *varray, size_t *varraylen)
+{
+ int rc;
+ u16 len;
+ u8 *mem, *ptr;
+ struct CPRBX *preqcblk, *prepcblk;
+ struct ica_xcRB xcrb;
+ struct fqreqparm {
+ u8 subfunc_code[2];
+ u16 rule_array_len;
+ char rule_array[8];
+ struct lv1 {
+ u16 len;
+ u8 data[VARDATASIZE];
+ } lv1;
+ u16 dummylen;
+ } *preqparm;
+ size_t parmbsize = sizeof(struct fqreqparm);
+ struct fqrepparm {
+ u8 subfunc_code[2];
+ u8 lvdata[0];
+ } *prepparm;
+
+ /* get already prepared memory for 2 cprbs with param block each */
+ rc = alloc_and_prep_cprbmem(parmbsize, &mem, &preqcblk, &prepcblk);
+ if (rc)
+ return rc;
+
+ /* fill request cprb struct */
+ preqcblk->domain = domain;
+
+ /* fill request cprb param block with FQ request */
+ preqparm = (struct fqreqparm *) preqcblk->req_parmb;
+ memcpy(preqparm->subfunc_code, "FQ", 2);
+ strncpy(preqparm->rule_array, keyword, sizeof(preqparm->rule_array));
+ preqparm->rule_array_len =
+ sizeof(preqparm->rule_array_len) + sizeof(preqparm->rule_array);
+ preqparm->lv1.len = sizeof(preqparm->lv1);
+ preqparm->dummylen = sizeof(preqparm->dummylen);
+ preqcblk->req_parml = parmbsize;
+
+ /* fill xcrb struct */
+ prep_xcrb(&xcrb, cardnr, preqcblk, prepcblk);
+
+ /* forward xcrb with request CPRB and reply CPRB to zcrypt dd */
+ rc = _zcrypt_send_cprb(&xcrb);
+ if (rc) {
+ DEBUG_ERR(
+ "query_crypto_facility zcrypt_send_cprb (cardnr=%d domain=%d) failed with errno %d\n",
+ (int) cardnr, (int) domain, rc);
+ goto out;
+ }
+
+ /* check response returncode and reasoncode */
+ if (prepcblk->ccp_rtcode != 0) {
+ DEBUG_ERR(
+ "query_crypto_facility unwrap secure key failure, card response %d/%d\n",
+ (int) prepcblk->ccp_rtcode,
+ (int) prepcblk->ccp_rscode);
+ rc = -EIO;
+ goto out;
+ }
+
+ /* process response cprb param block */
+ prepcblk->rpl_parmb = ((u8 *) prepcblk) + sizeof(struct CPRBX);
+ prepparm = (struct fqrepparm *) prepcblk->rpl_parmb;
+ ptr = prepparm->lvdata;
+
+ /* check and possibly copy reply rule array */
+ len = *((u16 *) ptr);
+ if (len > sizeof(u16)) {
+ ptr += sizeof(u16);
+ len -= sizeof(u16);
+ if (rarray && rarraylen && *rarraylen > 0) {
+ *rarraylen = (len > *rarraylen ? *rarraylen : len);
+ memcpy(rarray, ptr, *rarraylen);
+ }
+ ptr += len;
+ }
+ /* check and possible copy reply var array */
+ len = *((u16 *) ptr);
+ if (len > sizeof(u16)) {
+ ptr += sizeof(u16);
+ len -= sizeof(u16);
+ if (varray && varraylen && *varraylen > 0) {
+ *varraylen = (len > *varraylen ? *varraylen : len);
+ memcpy(varray, ptr, *varraylen);
+ }
+ ptr += len;
+ }
+
+out:
+ free_cprbmem(mem, parmbsize, 0);
+ return rc;
+}
+
+/*
+ * Fetch just the mkvp value via query_crypto_facility from adapter.
+ */
+static int fetch_mkvp(u16 cardnr, u16 domain, u64 *mkvp)
+{
+ int rc, found = 0;
+ size_t rlen, vlen;
+ u8 *rarray, *varray, *pg;
+
+ pg = (u8 *) __get_free_page(GFP_KERNEL);
+ if (!pg)
+ return -ENOMEM;
+ rarray = pg;
+ varray = pg + PAGE_SIZE/2;
+ rlen = vlen = PAGE_SIZE/2;
+
+ rc = query_crypto_facility(cardnr, domain, "STATICSA",
+ rarray, &rlen, varray, &vlen);
+ if (rc == 0 && rlen > 8*8 && vlen > 184+8) {
+ if (rarray[64] == '2') {
+ /* current master key state is valid */
+ *mkvp = *((u64 *)(varray + 184));
+ found = 1;
+ }
+ }
+
+ free_page((unsigned long) pg);
+
+ return found ? 0 : -ENOENT;
+}
+
+/* struct to hold cached mkvp info for each card/domain */
+struct mkvp_info {
+ struct list_head list;
+ u16 cardnr;
+ u16 domain;
+ u64 mkvp;
+};
+
+/* a list with mkvp_info entries */
+static LIST_HEAD(mkvp_list);
+static DEFINE_SPINLOCK(mkvp_list_lock);
+
+static int mkvp_cache_fetch(u16 cardnr, u16 domain, u64 *mkvp)
+{
+ int rc = -ENOENT;
+ struct mkvp_info *ptr;
+
+ spin_lock_bh(&mkvp_list_lock);
+ list_for_each_entry(ptr, &mkvp_list, list) {
+ if (ptr->cardnr == cardnr &&
+ ptr->domain == domain) {
+ *mkvp = ptr->mkvp;
+ rc = 0;
+ break;
+ }
+ }
+ spin_unlock_bh(&mkvp_list_lock);
+
+ return rc;
+}
+
+static void mkvp_cache_update(u16 cardnr, u16 domain, u64 mkvp)
+{
+ int found = 0;
+ struct mkvp_info *ptr;
+
+ spin_lock_bh(&mkvp_list_lock);
+ list_for_each_entry(ptr, &mkvp_list, list) {
+ if (ptr->cardnr == cardnr &&
+ ptr->domain == domain) {
+ ptr->mkvp = mkvp;
+ found = 1;
+ break;
+ }
+ }
+ if (!found) {
+ ptr = kmalloc(sizeof(*ptr), GFP_ATOMIC);
+ if (!ptr) {
+ spin_unlock_bh(&mkvp_list_lock);
+ return;
+ }
+ ptr->cardnr = cardnr;
+ ptr->domain = domain;
+ ptr->mkvp = mkvp;
+ list_add(&ptr->list, &mkvp_list);
+ }
+ spin_unlock_bh(&mkvp_list_lock);
+}
+
+static void mkvp_cache_scrub(u16 cardnr, u16 domain)
+{
+ struct mkvp_info *ptr;
+
+ spin_lock_bh(&mkvp_list_lock);
+ list_for_each_entry(ptr, &mkvp_list, list) {
+ if (ptr->cardnr == cardnr &&
+ ptr->domain == domain) {
+ list_del(&ptr->list);
+ kfree(ptr);
+ break;
+ }
+ }
+ spin_unlock_bh(&mkvp_list_lock);
+}
+
+static void __exit mkvp_cache_free(void)
+{
+ struct mkvp_info *ptr, *pnext;
+
+ spin_lock_bh(&mkvp_list_lock);
+ list_for_each_entry_safe(ptr, pnext, &mkvp_list, list) {
+ list_del(&ptr->list);
+ kfree(ptr);
+ }
+ spin_unlock_bh(&mkvp_list_lock);
+}
+
+/*
+ * Search for a matching crypto card based on the Master Key
+ * Verification Pattern provided inside a secure key.
+ */
+int pkey_findcard(const struct pkey_seckey *seckey,
+ u16 *pcardnr, u16 *pdomain, int verify)
+{
+ struct secaeskeytoken *t = (struct secaeskeytoken *) seckey;
+ struct zcrypt_device_matrix *device_matrix;
+ u16 card, dom;
+ u64 mkvp;
+ int i, rc;
+
+ /* mkvp must not be zero */
+ if (t->mkvp == 0)
+ return -EINVAL;
+
+ /* fetch status of all crypto cards */
+ device_matrix = kmalloc(sizeof(struct zcrypt_device_matrix),
+ GFP_KERNEL);
+ if (!device_matrix)
+ return -ENOMEM;
+ zcrypt_device_status_mask(device_matrix);
+
+ /* walk through all crypto cards */
+ for (i = 0; i < MAX_ZDEV_ENTRIES; i++) {
+ card = AP_QID_CARD(device_matrix->device[i].qid);
+ dom = AP_QID_QUEUE(device_matrix->device[i].qid);
+ if (device_matrix->device[i].online &&
+ device_matrix->device[i].functions & 0x04) {
+ /* an enabled CCA Coprocessor card */
+ /* try cached mkvp */
+ if (mkvp_cache_fetch(card, dom, &mkvp) == 0 &&
+ t->mkvp == mkvp) {
+ if (!verify)
+ break;
+ /* verify: fetch mkvp from adapter */
+ if (fetch_mkvp(card, dom, &mkvp) == 0) {
+ mkvp_cache_update(card, dom, mkvp);
+ if (t->mkvp == mkvp)
+ break;
+ }
+ }
+ } else {
+ /* Card is offline and/or not a CCA card. */
+ /* del mkvp entry from cache if it exists */
+ mkvp_cache_scrub(card, dom);
+ }
+ }
+ if (i >= MAX_ZDEV_ENTRIES) {
+ /* nothing found, so this time without cache */
+ for (i = 0; i < MAX_ZDEV_ENTRIES; i++) {
+ if (!(device_matrix->device[i].online &&
+ device_matrix->device[i].functions & 0x04))
+ continue;
+ card = AP_QID_CARD(device_matrix->device[i].qid);
+ dom = AP_QID_QUEUE(device_matrix->device[i].qid);
+ /* fresh fetch mkvp from adapter */
+ if (fetch_mkvp(card, dom, &mkvp) == 0) {
+ mkvp_cache_update(card, dom, mkvp);
+ if (t->mkvp == mkvp)
+ break;
+ }
+ }
+ }
+ if (i < MAX_ZDEV_ENTRIES) {
+ if (pcardnr)
+ *pcardnr = card;
+ if (pdomain)
+ *pdomain = dom;
+ rc = 0;
+ } else
+ rc = -ENODEV;
+
+ kfree(device_matrix);
+ return rc;
+}
+EXPORT_SYMBOL(pkey_findcard);
+
+/*
+ * Find card and transform secure key into protected key.
+ */
+int pkey_skey2pkey(const struct pkey_seckey *seckey,
+ struct pkey_protkey *protkey)
+{
+ u16 cardnr, domain;
+ int rc, verify;
+
+ /*
+ * The pkey_sec2protkey call may fail when a card has been
+ * addressed where the master key was changed after last fetch
+ * of the mkvp into the cache. So first try without verify then
+ * with verify enabled (thus refreshing the mkvp for each card).
+ */
+ for (verify = 0; verify < 2; verify++) {
+ rc = pkey_findcard(seckey, &cardnr, &domain, verify);
+ if (rc)
+ continue;
+ rc = pkey_sec2protkey(cardnr, domain, seckey, protkey);
+ if (rc == 0)
+ break;
+ }
+
+ if (rc)
+ DEBUG_DBG("pkey_skey2pkey failed rc=%d\n", rc);
+
+ return rc;
+}
+EXPORT_SYMBOL(pkey_skey2pkey);
+
+/*
+ * File io functions
+ */
+
+static long pkey_unlocked_ioctl(struct file *filp, unsigned int cmd,
+ unsigned long arg)
+{
+ int rc;
+
+ switch (cmd) {
+ case PKEY_GENSECK: {
+ struct pkey_genseck __user *ugs = (void __user *) arg;
+ struct pkey_genseck kgs;
+
+ if (copy_from_user(&kgs, ugs, sizeof(kgs)))
+ return -EFAULT;
+ rc = pkey_genseckey(kgs.cardnr, kgs.domain,
+ kgs.keytype, &kgs.seckey);
+ DEBUG_DBG("pkey_ioctl pkey_genseckey()=%d\n", rc);
+ if (rc)
+ break;
+ if (copy_to_user(ugs, &kgs, sizeof(kgs)))
+ return -EFAULT;
+ break;
+ }
+ case PKEY_CLR2SECK: {
+ struct pkey_clr2seck __user *ucs = (void __user *) arg;
+ struct pkey_clr2seck kcs;
+
+ if (copy_from_user(&kcs, ucs, sizeof(kcs)))
+ return -EFAULT;
+ rc = pkey_clr2seckey(kcs.cardnr, kcs.domain, kcs.keytype,
+ &kcs.clrkey, &kcs.seckey);
+ DEBUG_DBG("pkey_ioctl pkey_clr2seckey()=%d\n", rc);
+ if (rc)
+ break;
+ if (copy_to_user(ucs, &kcs, sizeof(kcs)))
+ return -EFAULT;
+ memzero_explicit(&kcs, sizeof(kcs));
+ break;
+ }
+ case PKEY_SEC2PROTK: {
+ struct pkey_sec2protk __user *usp = (void __user *) arg;
+ struct pkey_sec2protk ksp;
+
+ if (copy_from_user(&ksp, usp, sizeof(ksp)))
+ return -EFAULT;
+ rc = pkey_sec2protkey(ksp.cardnr, ksp.domain,
+ &ksp.seckey, &ksp.protkey);
+ DEBUG_DBG("pkey_ioctl pkey_sec2protkey()=%d\n", rc);
+ if (rc)
+ break;
+ if (copy_to_user(usp, &ksp, sizeof(ksp)))
+ return -EFAULT;
+ break;
+ }
+ case PKEY_CLR2PROTK: {
+ struct pkey_clr2protk __user *ucp = (void __user *) arg;
+ struct pkey_clr2protk kcp;
+
+ if (copy_from_user(&kcp, ucp, sizeof(kcp)))
+ return -EFAULT;
+ rc = pkey_clr2protkey(kcp.keytype,
+ &kcp.clrkey, &kcp.protkey);
+ DEBUG_DBG("pkey_ioctl pkey_clr2protkey()=%d\n", rc);
+ if (rc)
+ break;
+ if (copy_to_user(ucp, &kcp, sizeof(kcp)))
+ return -EFAULT;
+ memzero_explicit(&kcp, sizeof(kcp));
+ break;
+ }
+ case PKEY_FINDCARD: {
+ struct pkey_findcard __user *ufc = (void __user *) arg;
+ struct pkey_findcard kfc;
+
+ if (copy_from_user(&kfc, ufc, sizeof(kfc)))
+ return -EFAULT;
+ rc = pkey_findcard(&kfc.seckey,
+ &kfc.cardnr, &kfc.domain, 1);
+ DEBUG_DBG("pkey_ioctl pkey_findcard()=%d\n", rc);
+ if (rc)
+ break;
+ if (copy_to_user(ufc, &kfc, sizeof(kfc)))
+ return -EFAULT;
+ break;
+ }
+ case PKEY_SKEY2PKEY: {
+ struct pkey_skey2pkey __user *usp = (void __user *) arg;
+ struct pkey_skey2pkey ksp;
+
+ if (copy_from_user(&ksp, usp, sizeof(ksp)))
+ return -EFAULT;
+ rc = pkey_skey2pkey(&ksp.seckey, &ksp.protkey);
+ DEBUG_DBG("pkey_ioctl pkey_skey2pkey()=%d\n", rc);
+ if (rc)
+ break;
+ if (copy_to_user(usp, &ksp, sizeof(ksp)))
+ return -EFAULT;
+ break;
+ }
+ default:
+ /* unknown/unsupported ioctl cmd */
+ return -ENOTTY;
+ }
+
+ return rc;
+}
+
+/*
+ * Sysfs and file io operations
+ */
+static const struct file_operations pkey_fops = {
+ .owner = THIS_MODULE,
+ .open = nonseekable_open,
+ .llseek = no_llseek,
+ .unlocked_ioctl = pkey_unlocked_ioctl,
+};
+
+static struct miscdevice pkey_dev = {
+ .name = "pkey",
+ .minor = MISC_DYNAMIC_MINOR,
+ .mode = 0666,
+ .fops = &pkey_fops,
+};
+
+/*
+ * Module init
+ */
+int __init pkey_init(void)
+{
+ cpacf_mask_t pckmo_functions;
+
+ /* check for pckmo instructions available */
+ if (!cpacf_query(CPACF_PCKMO, &pckmo_functions))
+ return -EOPNOTSUPP;
+ if (!cpacf_test_func(&pckmo_functions, CPACF_PCKMO_ENC_AES_128_KEY) ||
+ !cpacf_test_func(&pckmo_functions, CPACF_PCKMO_ENC_AES_192_KEY) ||
+ !cpacf_test_func(&pckmo_functions, CPACF_PCKMO_ENC_AES_256_KEY))
+ return -EOPNOTSUPP;
+
+ pkey_debug_init();
+
+ return misc_register(&pkey_dev);
+}
+
+/*
+ * Module exit
+ */
+static void __exit pkey_exit(void)
+{
+ misc_deregister(&pkey_dev);
+ mkvp_cache_free();
+ pkey_debug_exit();
+}
+
+module_init(pkey_init);
+module_exit(pkey_exit);
diff --git a/drivers/s390/crypto/zcrypt_api.c b/drivers/s390/crypto/zcrypt_api.c
index 144a17941e6f..93015f85d4a6 100644
--- a/drivers/s390/crypto/zcrypt_api.c
+++ b/drivers/s390/crypto/zcrypt_api.c
@@ -374,7 +374,7 @@ out:
return rc;
}
-static long zcrypt_send_cprb(struct ica_xcRB *xcRB)
+long zcrypt_send_cprb(struct ica_xcRB *xcRB)
{
struct zcrypt_card *zc, *pref_zc;
struct zcrypt_queue *zq, *pref_zq;
@@ -444,6 +444,7 @@ out:
AP_QID_CARD(qid), AP_QID_QUEUE(qid));
return rc;
}
+EXPORT_SYMBOL(zcrypt_send_cprb);
static bool is_desired_ep11_card(unsigned int dev_id,
unsigned short target_num,
@@ -619,7 +620,7 @@ out:
return rc;
}
-static void zcrypt_device_status_mask(struct zcrypt_device_matrix *matrix)
+void zcrypt_device_status_mask(struct zcrypt_device_matrix *matrix)
{
struct zcrypt_card *zc;
struct zcrypt_queue *zq;
diff --git a/drivers/s390/crypto/zcrypt_api.h b/drivers/s390/crypto/zcrypt_api.h
index 274a59051534..6c94efd23eac 100644
--- a/drivers/s390/crypto/zcrypt_api.h
+++ b/drivers/s390/crypto/zcrypt_api.h
@@ -190,5 +190,7 @@ void zcrypt_msgtype_unregister(struct zcrypt_ops *);
struct zcrypt_ops *zcrypt_msgtype(unsigned char *, int);
int zcrypt_api_init(void);
void zcrypt_api_exit(void);
+long zcrypt_send_cprb(struct ica_xcRB *xcRB);
+void zcrypt_device_status_mask(struct zcrypt_device_matrix *devstatus);
#endif /* _ZCRYPT_API_H_ */