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/* SPDX-License-Identifier: GPL-2.0
*
* Copyright (C) 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/random.h>
#include <asm/cpufeature.h>
#include <asm/processor.h>
#include <asm/fpu/api.h>
#include <asm/simd.h>
static unsigned long stamp = 0;
module_param(stamp, ulong, 0);
int dummy;
enum { POLY1305_MAC_SIZE = 16, POLY1305_KEY_SIZE = 32 };
#include "test_vectors.h"
#define declare_it(name) \
bool poly1305_ ## name(u8 tag[POLY1305_MAC_SIZE], const u8 * msg, const u32 len, const u8 key[POLY1305_KEY_SIZE]); \
static __always_inline int name(size_t len) \
{ \
return poly1305_ ## name(dummy_out, input_data, len, input_key); \
}
#define do_it(name) do { \
for (i = 0; i < WARMUP; ++i) \
ret |= name(sizeof(input_data)); \
for (j = 0, s = STARTING_SIZE; j <= DOUBLING_STEPS; ++j, s *= 2) { \
start_ ## name[j] = get_cycles(); \
for (i = 0; i < TRIALS; ++i) \
ret |= name(s); \
end_ ## name[j] = get_cycles(); \
} \
} while (0)
#define test_it(name, before, after) do { \
memset(out, __LINE__, POLY1305_MAC_SIZE); \
before; \
ret = poly1305_ ## name(out, poly1305_test_vectors[i].input.data, poly1305_test_vectors[i].input.size, poly1305_test_vectors[i].key.data); \
after; \
if (memcmp(out, poly1305_test_vectors[i].expected.data, POLY1305_MAC_SIZE)) { \
pr_err(#name " self-test %zu: FAIL\n", i + 1); \
return false; \
} \
} while (0)
#define report_it(name) do { \
char dec[20]; \
size_t l; \
pr_err("%lu: %11s:", stamp, #name); \
for (j = 0, s = STARTING_SIZE; j <= DOUBLING_STEPS; ++j, s *= 2) { \
memset(dec, 0, sizeof(dec)); \
l = scnprintf(dec, sizeof(dec) - 2, "%llu", 100ULL * (end_ ## name[j] - start_ ## name[j]) / TRIALS / s); \
dec[l] = dec[l - 1]; \
dec[l - 1] = dec[l - 2]; \
dec[l - 2] = '.'; \
printk(KERN_CONT " %6s", dec); \
} \
printk(KERN_CONT "\n"); \
} while (0)
enum { WARMUP = 50000, TRIALS = 100000, IDLE = 1 * 1000, STARTING_SIZE = 128, DOUBLING_STEPS = 5 };
u8 dummy_out[POLY1305_MAC_SIZE];
u8 input_key[POLY1305_KEY_SIZE];
u8 input_data[STARTING_SIZE * (1ULL << DOUBLING_STEPS)];
declare_it(hacl64)
declare_it(ref)
declare_it(ossl_c)
declare_it(ossl_amd64)
declare_it(ossl_avx)
declare_it(ossl_avx2)
declare_it(ossl_avx512)
static bool verify(void)
{
int ret;
size_t i = 0;
u8 out[POLY1305_MAC_SIZE];
for (i = 0; i < ARRAY_SIZE(poly1305_test_vectors); ++i) {
test_it(hacl64, {}, {});
test_it(ref, {}, {});
test_it(ossl_c, {}, {});
test_it(ossl_amd64, {}, {});
if (boot_cpu_has(X86_FEATURE_AVX) && cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, NULL))
test_it(ossl_avx, kernel_fpu_begin(), kernel_fpu_end());
if (boot_cpu_has(X86_FEATURE_AVX) && boot_cpu_has(X86_FEATURE_AVX2) && cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, NULL))
test_it(ossl_avx2, kernel_fpu_begin(), kernel_fpu_end());
if (boot_cpu_has(X86_FEATURE_AVX) && boot_cpu_has(X86_FEATURE_AVX2) && boot_cpu_has(X86_FEATURE_AVX512F) && cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM | XFEATURE_MASK_AVX512, NULL))
test_it(ossl_avx512, kernel_fpu_begin(), kernel_fpu_end());
}
return true;
}
static int __init mod_init(void)
{
size_t s;
int ret = 0, i, j;
cycles_t start_hacl64[DOUBLING_STEPS + 1], end_hacl64[DOUBLING_STEPS + 1];
cycles_t start_ref[DOUBLING_STEPS + 1], end_ref[DOUBLING_STEPS + 1];
cycles_t start_ossl_c[DOUBLING_STEPS + 1], end_ossl_c[DOUBLING_STEPS + 1];
cycles_t start_ossl_amd64[DOUBLING_STEPS + 1], end_ossl_amd64[DOUBLING_STEPS + 1];
cycles_t start_ossl_avx[DOUBLING_STEPS + 1], end_ossl_avx[DOUBLING_STEPS + 1];
cycles_t start_ossl_avx2[DOUBLING_STEPS + 1], end_ossl_avx2[DOUBLING_STEPS + 1];
cycles_t start_ossl_avx512[DOUBLING_STEPS + 1], end_ossl_avx512[DOUBLING_STEPS + 1];
unsigned long flags;
DEFINE_SPINLOCK(lock);
if (!verify())
return -EBFONT;
for (i = 0; i < sizeof(input_data); ++i)
input_data[i] = i;
for (i = 0; i < sizeof(input_key); ++i)
input_key[i] = i;
msleep(IDLE);
kernel_fpu_begin();
spin_lock_irqsave(&lock, flags);
do_it(hacl64);
do_it(ref);
do_it(ossl_c);
do_it(ossl_amd64);
if (boot_cpu_has(X86_FEATURE_AVX) && cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, NULL))
do_it(ossl_avx);
if (boot_cpu_has(X86_FEATURE_AVX) && boot_cpu_has(X86_FEATURE_AVX2) && cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, NULL))
do_it(ossl_avx2);
if (boot_cpu_has(X86_FEATURE_AVX) && boot_cpu_has(X86_FEATURE_AVX2) && boot_cpu_has(X86_FEATURE_AVX512F) && cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM | XFEATURE_MASK_AVX512, NULL))
do_it(ossl_avx512);
spin_unlock_irqrestore(&lock, flags);
kernel_fpu_end();
pr_err("%lu: ", stamp);
for (j = 0, s = STARTING_SIZE; j <= DOUBLING_STEPS; ++j, s *= 2) \
printk(KERN_CONT " \x1b[4m%6zu\x1b[24m", s);
report_it(hacl64);
report_it(ref);
report_it(ossl_c);
report_it(ossl_amd64);
if (boot_cpu_has(X86_FEATURE_AVX) && cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, NULL))
report_it(ossl_avx);
if (boot_cpu_has(X86_FEATURE_AVX) && boot_cpu_has(X86_FEATURE_AVX2) && cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, NULL))
report_it(ossl_avx2);
if (boot_cpu_has(X86_FEATURE_AVX) && boot_cpu_has(X86_FEATURE_AVX2) && boot_cpu_has(X86_FEATURE_AVX512F) && cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM | XFEATURE_MASK_AVX512, NULL))
report_it(ossl_avx512);
/* Don't let compiler be too clever. */
dummy = ret;
/* We should never actually agree to insert the module. Choosing
* -0x1000 here is an amazing hack. It causes the kernel to not
* actually load the module, while the standard userspace tools
* don't return an error, because it's too big. */
return -0x1000;
}
module_init(mod_init);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("kBench9000 Cycle Counter");
MODULE_AUTHOR("Jason A. Donenfeld <Jason@zx2c4.com>");
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