diff options
Diffstat (limited to 'drivers/crypto/padlock-sha.c')
| -rw-r--r-- | drivers/crypto/padlock-sha.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/crypto/padlock-sha.c b/drivers/crypto/padlock-sha.c index 40d5680fa013..a7fbadebf623 100644 --- a/drivers/crypto/padlock-sha.c +++ b/drivers/crypto/padlock-sha.c @@ -22,6 +22,7 @@ #include <linux/interrupt.h> #include <linux/kernel.h> #include <linux/scatterlist.h> +#include <asm/i387.h> #include "padlock.h" #define SHA1_DEFAULT_FALLBACK "sha1-generic" @@ -102,6 +103,7 @@ static void padlock_do_sha1(const char *in, char *out, int count) * PadLock microcode needs it that big. */ char buf[128+16]; char *result = NEAREST_ALIGNED(buf); + int ts_state; ((uint32_t *)result)[0] = SHA1_H0; ((uint32_t *)result)[1] = SHA1_H1; @@ -109,9 +111,12 @@ static void padlock_do_sha1(const char *in, char *out, int count) ((uint32_t *)result)[3] = SHA1_H3; ((uint32_t *)result)[4] = SHA1_H4; + /* prevent taking the spurious DNA fault with padlock. */ + ts_state = irq_ts_save(); asm volatile (".byte 0xf3,0x0f,0xa6,0xc8" /* rep xsha1 */ : "+S"(in), "+D"(result) : "c"(count), "a"(0)); + irq_ts_restore(ts_state); padlock_output_block((uint32_t *)result, (uint32_t *)out, 5); } @@ -123,6 +128,7 @@ static void padlock_do_sha256(const char *in, char *out, int count) * PadLock microcode needs it that big. */ char buf[128+16]; char *result = NEAREST_ALIGNED(buf); + int ts_state; ((uint32_t *)result)[0] = SHA256_H0; ((uint32_t *)result)[1] = SHA256_H1; @@ -133,9 +139,12 @@ static void padlock_do_sha256(const char *in, char *out, int count) ((uint32_t *)result)[6] = SHA256_H6; ((uint32_t *)result)[7] = SHA256_H7; + /* prevent taking the spurious DNA fault with padlock. */ + ts_state = irq_ts_save(); asm volatile (".byte 0xf3,0x0f,0xa6,0xd0" /* rep xsha256 */ : "+S"(in), "+D"(result) : "c"(count), "a"(0)); + irq_ts_restore(ts_state); padlock_output_block((uint32_t *)result, (uint32_t *)out, 8); } |