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btrfs-progs: fix detection of accelerated implementation. 

The build fails with crypto backends other than builtin, the
initializers cannot be reached as they're ifdef-ed out.  Move
hash_init_accel under the right condition and delete the
algorithm-specific initializers as they're used only by the hash test
and that can simply call hash_init_accel to set the implementation.

All the -m flags need to be detected at configure time and the flag used
for ifdef (HAVE_CFLAG_m*), not the actual feature defined by compiler as
the dispatcher function is not built with the -m flags.

The uname check for x86_64 must be dropped so on i386/i586 we can still
build accelerated version.

Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2023-03-01 01:32:26 +01:00
parent 6439e92cba
commit 4fc291a465
8 changed files with 57 additions and 36 deletions
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8
Makefile
View File

@ -130,14 +130,18 @@ LIBBTRFSUTIL_LDFLAGS = $(SUBST_LDFLAGS) \
# Default implementation
CRYPTO_OBJECTS =
ifeq ($(shell uname -m),x86_64)
ifeq ($(HAVE_CFLAG_msse2),1)
crypto_blake2b_sse2_cflags = -msse2
endif
ifeq ($(HAVE_CFLAG_msse41),1)
crypto_blake2b_sse41_cflags = -msse4.1
endif
ifeq ($(HAVE_CFLAG_mavx2),1)
crypto_blake2b_avx2_cflags = -mavx2
endif
ifeq ($(HAVE_CFLAG_msha),1)
crypto_sha256_x86_cflags = -msse4.1 -msha
endif
endif
LIBS = $(LIBS_BASE) $(LIBS_CRYPTO)
LIBBTRFS_LIBS = $(LIBS_BASE) $(LIBS_CRYPTO)

3
Makefile.inc.in
View File

@ -24,6 +24,9 @@ PYTHON_CFLAGS = @PYTHON_CFLAGS@
CRYPTOPROVIDER_BUILTIN = @CRYPTOPROVIDER_BUILTIN@
CRYPTO_CFLAGS = @GCRYPT_CFLAGS@ @SODIUM_CFLAGS@ @KCAPI_CFLAGS@
HAVE_CFLAG_msse2 = @HAVE_CFLAG_msse2@
HAVE_CFLAG_msse41 = @HAVE_CFLAG_msse41@
HAVE_CFLAG_mavx2 = @HAVE_CFLAG_mavx2@
HAVE_CFLAG_msha = @HAVE_CFLAG_msha@
SUBST_CFLAGS = @CFLAGS@

12
configure.ac
View File

@ -43,6 +43,18 @@ AC_C_CONST
AC_C_VOLATILE
AC_C_BIGENDIAN
AX_CHECK_COMPILE_FLAG([-msse2], [HAVE_CFLAG_msse2=1], [HAVE_CFLAG_msse2=0])
AC_SUBST([HAVE_CFLAG_msse2])
AC_DEFINE_UNQUOTED([HAVE_CFLAG_msse2], [$HAVE_CFLAG_msse2], [Compiler supports -msse2])
AX_CHECK_COMPILE_FLAG([-msse4.1], [HAVE_CFLAG_msse41=1], [HAVE_CFLAG_msse41=0])
AC_SUBST([HAVE_CFLAG_msse41])
AC_DEFINE_UNQUOTED([HAVE_CFLAG_msse41], [$HAVE_CFLAG_msse41], [Compiler supports -msse4.1])
AX_CHECK_COMPILE_FLAG([-mavx2], [HAVE_CFLAG_mavx2=1], [HAVE_CFLAG_mavx2=0])
AC_SUBST([HAVE_CFLAG_mavx2])
AC_DEFINE_UNQUOTED([HAVE_CFLAG_mavx2], [$HAVE_CFLAG_mavx2], [Compiler supports -mavx2])
AX_CHECK_COMPILE_FLAG([-msha], [HAVE_CFLAG_msha=1], [HAVE_CFLAG_msha=0])
AC_SUBST([HAVE_CFLAG_msha])
AC_DEFINE_UNQUOTED([HAVE_CFLAG_msha], [$HAVE_CFLAG_msha], [Compiler supports -msha])

6
crypto/blake2b-ref.c
View File

@ -229,15 +229,15 @@ static void (*blake2b_compress)( blake2b_state *S, const uint8_t block[BLAKE2B_B
void blake2_init_accel(void)
{
if (0);
#if HAVE_AVX2
#if HAVE_CFLAG_mavx2 == 1
else if (cpu_has_feature(CPU_FLAG_AVX2))
blake2b_compress = blake2b_compress_avx2;
#endif
#if HAVE_SSE41
#if HAVE_CFLAG_msse41 == 1
else if (cpu_has_feature(CPU_FLAG_SSE41))
blake2b_compress = blake2b_compress_sse41;
#endif
#if HAVE_SSE2
#if HAVE_CFLAG_msse2 == 1
else if (cpu_has_feature(CPU_FLAG_SSE2))
blake2b_compress = blake2b_compress_sse2;
#endif

19
crypto/hash-speedtest.c
View File

@ -183,27 +183,26 @@ int main(int argc, char **argv) {
u64 cycles;
u64 time;
unsigned long cpu_flag;
void (*init_accel)(void);
} contestants[] = {
{ .name = "NULL-NOP", .digest = hash_null_nop, .digest_size = 32 },
{ .name = "NULL-MEMCPY", .digest = hash_null_memcpy, .digest_size = 32 },
{ .name = "CRC32C-ref", .digest = hash_crc32c, .digest_size = 4,
.cpu_flag = CPU_FLAG_NONE, .init_accel = hash_init_crc32c },
.cpu_flag = CPU_FLAG_NONE },
{ .name = "CRC32C-NI", .digest = hash_crc32c, .digest_size = 4,
.cpu_flag = CPU_FLAG_SSE42, .init_accel = hash_init_crc32c },
.cpu_flag = CPU_FLAG_SSE42 },
{ .name = "XXHASH", .digest = hash_xxhash, .digest_size = 8 },
{ .name = "SHA256-ref", .digest = hash_sha256, .digest_size = 32,
.cpu_flag = CPU_FLAG_NONE, .init_accel = hash_init_sha256 },
.cpu_flag = CPU_FLAG_NONE },
{ .name = "SHA256-NI", .digest = hash_sha256, .digest_size = 32,
.cpu_flag = CPU_FLAG_SHA, .init_accel = hash_init_sha256 },
.cpu_flag = CPU_FLAG_SHA },
{ .name = "BLAKE2-ref", .digest = hash_blake2b, .digest_size = 32,
.cpu_flag = CPU_FLAG_NONE, .init_accel = hash_init_blake2 },
.cpu_flag = CPU_FLAG_NONE },
{ .name = "BLAKE2-SSE2", .digest = hash_blake2b, .digest_size = 32,
.cpu_flag = CPU_FLAG_SSE2, .init_accel = hash_init_blake2 },
.cpu_flag = CPU_FLAG_SSE2 },
{ .name = "BLAKE2-SSE41", .digest = hash_blake2b, .digest_size = 32,
.cpu_flag = CPU_FLAG_SSE41, .init_accel = hash_init_blake2 },
.cpu_flag = CPU_FLAG_SSE41 },
{ .name = "BLAKE2-AVX2", .digest = hash_blake2b, .digest_size = 32,
.cpu_flag = CPU_FLAG_AVX2, .init_accel = hash_init_blake2 },
.cpu_flag = CPU_FLAG_AVX2 },
};
int units = UNITS_CYCLES;
@ -278,7 +277,7 @@ int main(int argc, char **argv) {
if (c->cpu_flag) {
cpu_set_level(c->cpu_flag);
c->init_accel();
hash_init_accel();
}
tstart = get_time();
start = get_cycles(units);

39
crypto/hash.c
View File

@ -20,28 +20,11 @@
#include "crypto/sha.h"
#include "crypto/blake2.h"
void hash_init_accel(void)
{
crc32c_init_accel();
blake2_init_accel();
sha256_init_accel();
}
void hash_init_crc32c(void)
{
crc32c_init_accel();
}
void hash_init_blake2(void)
{
blake2_init_accel();
}
void hash_init_sha256(void)
{
sha256_init_accel();
}
/*
* Default builtin implementations
*/
@ -70,6 +53,13 @@ int hash_xxhash(const u8 *buf, size_t length, u8 *out)
*/
#if CRYPTOPROVIDER_BUILTIN == 1
void hash_init_accel(void)
{
crc32c_init_accel();
blake2_init_accel();
sha256_init_accel();
}
int hash_sha256(const u8 *buf, size_t len, u8 *out)
{
SHA256Context context;
@ -98,6 +88,11 @@ int hash_blake2b(const u8 *buf, size_t len, u8 *out)
#include <gcrypt.h>
void hash_init_accel(void)
{
crc32c_init_accel();
}
int hash_sha256(const u8 *buf, size_t len, u8 *out)
{
gcry_md_hash_buffer(GCRY_MD_SHA256, out, buf, len);
@ -117,6 +112,11 @@ int hash_blake2b(const u8 *buf, size_t len, u8 *out)
#include <sodium/crypto_hash_sha256.h>
#include <sodium/crypto_generichash_blake2b.h>
void hash_init_accel(void)
{
crc32c_init_accel();
}
int hash_sha256(const u8 *buf, size_t len, u8 *out)
{
return crypto_hash_sha256(out, buf, len);
@ -134,6 +134,11 @@ int hash_blake2b(const u8 *buf, size_t len, u8 *out)
#include <kcapi.h>
void hash_init_accel(void)
{
crc32c_init_accel();
}
int hash_sha256(const u8 *buf, size_t len, u8 *out)
{
static struct kcapi_handle *handle = NULL;

2
crypto/hash.h
View File

@ -28,7 +28,5 @@ int hash_blake2b(const u8 *buf, size_t length, u8 *out);
void hash_init_accel(void);
void hash_init_crc32c(void);
void hash_init_blake2(void);
void hash_init_sha256(void);
#endif

4
crypto/sha224-256.c
View File

@ -97,7 +97,7 @@ static uint32_t SHA256_H0[SHA256HashSize/4] = {
static void (*sha256_process_message_block)(SHA256Context *context) = SHA224_256ProcessMessageBlock;
#ifdef __SHA__
#if HAVE_CFLAG_msha == 1
void sha256_process_x86(uint32_t state[8], const uint8_t data[], uint32_t length);
static void sha256_process_x86_dispatch(SHA256Context *context)
@ -110,7 +110,7 @@ static void sha256_process_x86_dispatch(SHA256Context *context)
void sha256_init_accel(void)
{
#ifdef __SHA__
#if HAVE_CFLAG_msha == 1
if (cpu_has_feature(CPU_FLAG_SHA))
sha256_process_message_block = sha256_process_x86_dispatch;
else