diff options
| author |   Sean Christopherson <seanjc@google.com> | 2021-04-06 15:49:51 -0700 |
|---|---|---|
| committer |   Paolo Bonzini <pbonzini@redhat.com> | 2021-04-21 12:20:07 -0400 |
| commit | a402e35177797d736dd3dc2d8537c1c9ac90d54a (patch) | |
| tree | 93362057bf4bae64a5c9c5dcda84993c7eacefa6 /drivers/crypto | |
| parent | crypto: ccp: Use the stack and common buffer for status commands (diff) | |
| download | linux-dev-a402e35177797d736dd3dc2d8537c1c9ac90d54a.tar.xz linux-dev-a402e35177797d736dd3dc2d8537c1c9ac90d54a.zip | |
crypto: ccp: Use the stack and common buffer for INIT command
Drop the dedicated init_cmd_buf and instead use a local variable. Now
that the low level helper uses an internal buffer for all commands,
using the stack for the upper layers is safe even when running with
CONFIG_VMAP_STACK=y.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210406224952.4177376-8-seanjc@google.com>
Reviewed-by: Brijesh Singh <brijesh.singh@amd.com>
Acked-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'drivers/crypto')
| -rw-r--r-- | drivers/crypto/ccp/sev-dev.c | 10 | ||||
| -rw-r--r-- | drivers/crypto/ccp/sev-dev.h | 1 |
2 files changed, 6 insertions, 5 deletions
diff --git a/drivers/crypto/ccp/sev-dev.c b/drivers/crypto/ccp/sev-dev.c index 2184c4a67d35..6ee703176049 100644 --- a/drivers/crypto/ccp/sev-dev.c +++ b/drivers/crypto/ccp/sev-dev.c @@ -234,6 +234,7 @@ static int sev_do_cmd(int cmd, void *data, int *psp_ret) static int __sev_platform_init_locked(int *error) { struct psp_device *psp = psp_master; + struct sev_data_init data; struct sev_device *sev; int rc = 0; @@ -245,6 +246,7 @@ static int __sev_platform_init_locked(int *error) if (sev->state == SEV_STATE_INIT) return 0; + memset(&data, 0, sizeof(data)); if (sev_es_tmr) { u64 tmr_pa; @@ -254,12 +256,12 @@ static int __sev_platform_init_locked(int *error) */ tmr_pa = __pa(sev_es_tmr); - sev->init_cmd_buf.flags |= SEV_INIT_FLAGS_SEV_ES; - sev->init_cmd_buf.tmr_address = tmr_pa; - sev->init_cmd_buf.tmr_len = SEV_ES_TMR_SIZE; + data.flags |= SEV_INIT_FLAGS_SEV_ES; + data.tmr_address = tmr_pa; + data.tmr_len = SEV_ES_TMR_SIZE; } - rc = __sev_do_cmd_locked(SEV_CMD_INIT, &sev->init_cmd_buf, error); + rc = __sev_do_cmd_locked(SEV_CMD_INIT, &data, error); if (rc) return rc; diff --git a/drivers/crypto/ccp/sev-dev.h b/drivers/crypto/ccp/sev-dev.h index 0fd21433f627..666c21eb81ab 100644 --- a/drivers/crypto/ccp/sev-dev.h +++ b/drivers/crypto/ccp/sev-dev.h @@ -46,7 +46,6 @@ struct sev_device { unsigned int int_rcvd; wait_queue_head_t int_queue; struct sev_misc_dev *misc; - struct sev_data_init init_cmd_buf; u8 api_major; u8 api_minor; |