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Change movaps to movups in AES-NI code

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Currently, the ICP contains accelerated assembly code to be
used specifically on CPUs with AES-NI enabled. This code
makes heavy use of the movaps instruction which assumes that
it will be provided aes keys that are 16 byte aligned. This
assumption seems to hold on Illumos, but on Linux some kernel
options such as 'slub_debug=P' will violate it. This patch
changes all instances of this instruction to movups which is
the same except that it can handle unaligned memory.

This patch also adds a few flags which were accidentally never
given to the assembly compiler, resulting in objtool warnings.

Reviewed by: Gvozden Neskovic <neskovic@gmail.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Nathaniel R. Lewis <linux.robotdude@gmail.com>
Signed-off-by: Tom Caputi <tcaputi@datto.com>
Closes #7065 
Closes #7108
This commit is contained in:
Tom Caputi 2018-01-31 18:17:56 -05:00 committed by Brian Behlendorf
parent f90a30ad1b
commit a73c94934f
3 changed files with 49 additions and 48 deletions
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1
module/icp/Makefile.in
View File

@ -26,6 +26,7 @@ endif
obj-$(CONFIG_ZFS) := $(MODULE).o
asflags-y := -I$(src)/include
asflags-y += $(ZFS_MODULE_CFLAGS) $(ZFS_MODULE_CPPFLAGS)
ccflags-y := -I$(src)/include
ccflags-y += $(ZFS_MODULE_CFLAGS) $(ZFS_MODULE_CPPFLAGS)

94
module/icp/asm-x86_64/aes/aes_intel.S
View File

@ -207,7 +207,7 @@ _key_expansion_256a_local:
shufps $0b10001100, %xmm0, %xmm4
pxor %xmm4, %xmm0
pxor %xmm1, %xmm0
movaps %xmm0, (%rcx)
movups %xmm0, (%rcx)
add $0x10, %rcx
ret
nop
@ -224,18 +224,18 @@ _key_expansion_192a_local:
pxor %xmm4, %xmm0
pxor %xmm1, %xmm0
movaps %xmm2, %xmm5
movaps %xmm2, %xmm6
movups %xmm2, %xmm5
movups %xmm2, %xmm6
pslldq $4, %xmm5
pshufd $0b11111111, %xmm0, %xmm3
pxor %xmm3, %xmm2
pxor %xmm5, %xmm2
movaps %xmm0, %xmm1
movups %xmm0, %xmm1
shufps $0b01000100, %xmm0, %xmm6
movaps %xmm6, (%rcx)
movups %xmm6, (%rcx)
shufps $0b01001110, %xmm2, %xmm1
movaps %xmm1, 0x10(%rcx)
movups %xmm1, 0x10(%rcx)
add $0x20, %rcx
ret
SET_SIZE(_key_expansion_192a)
@ -250,13 +250,13 @@ _key_expansion_192b_local:
pxor %xmm4, %xmm0
pxor %xmm1, %xmm0
movaps %xmm2, %xmm5
movups %xmm2, %xmm5
pslldq $4, %xmm5
pshufd $0b11111111, %xmm0, %xmm3
pxor %xmm3, %xmm2
pxor %xmm5, %xmm2
movaps %xmm0, (%rcx)
movups %xmm0, (%rcx)
add $0x10, %rcx
ret
SET_SIZE(_key_expansion_192b)
@ -270,7 +270,7 @@ _key_expansion_256b_local:
shufps $0b10001100, %xmm2, %xmm4
pxor %xmm4, %xmm2
pxor %xmm1, %xmm2
movaps %xmm2, (%rcx)
movups %xmm2, (%rcx)
add $0x10, %rcx
ret
SET_SIZE(_key_expansion_256b)
@ -327,7 +327,7 @@ rijndael_key_setup_enc_intel_local:
jz .Lenc_key_invalid_param
movups (%USERCIPHERKEY), %xmm0 // user key (first 16 bytes)
movaps %xmm0, (%AESKEY)
movups %xmm0, (%AESKEY)
lea 0x10(%AESKEY), %rcx // key addr
pxor %xmm4, %xmm4 // xmm4 is assumed 0 in _key_expansion_x
@ -341,7 +341,7 @@ rijndael_key_setup_enc_intel_local:
#endif /* OPENSSL_INTERFACE */
movups 0x10(%USERCIPHERKEY), %xmm2 // other user key (2nd 16 bytes)
movaps %xmm2, (%rcx)
movups %xmm2, (%rcx)
add $0x10, %rcx
aeskeygenassist $0x1, %xmm2, %xmm1 // expand the key
@ -525,10 +525,10 @@ FRAME_BEGIN
.align 4
.Ldec_key_reorder_loop:
movaps (%AESKEY), %xmm0
movaps (%ROUNDS64), %xmm1
movaps %xmm0, (%ROUNDS64)
movaps %xmm1, (%AESKEY)
movups (%AESKEY), %xmm0
movups (%ROUNDS64), %xmm1
movups %xmm0, (%ROUNDS64)
movups %xmm1, (%AESKEY)
lea 0x10(%AESKEY), %AESKEY
lea -0x10(%ROUNDS64), %ROUNDS64
cmp %AESKEY, %ROUNDS64
@ -536,11 +536,11 @@ FRAME_BEGIN
.align 4
.Ldec_key_inv_loop:
movaps (%rcx), %xmm0
movups (%rcx), %xmm0
// Convert an encryption round key to a form usable for decryption
// with the "AES Inverse Mix Columns" instruction
aesimc %xmm0, %xmm1
movaps %xmm1, (%rcx)
movups %xmm1, (%rcx)
lea 0x10(%rcx), %rcx
cmp %ENDAESKEY, %rcx
jnz .Ldec_key_inv_loop
@ -602,7 +602,7 @@ FRAME_BEGIN
ENTRY_NP(aes_encrypt_intel)
movups (%INP), %STATE // input
movaps (%KEYP), %KEY // key
movups (%KEYP), %KEY // key
#ifdef OPENSSL_INTERFACE
mov 240(%KEYP), %NROUNDS32 // round count
#else /* OpenSolaris Interface */
@ -618,41 +618,41 @@ ENTRY_NP(aes_encrypt_intel)
// AES 256
lea 0x20(%KEYP), %KEYP
movaps -0x60(%KEYP), %KEY
movups -0x60(%KEYP), %KEY
aesenc %KEY, %STATE
movaps -0x50(%KEYP), %KEY
movups -0x50(%KEYP), %KEY
aesenc %KEY, %STATE
.align 4
.Lenc192:
// AES 192 and 256
movaps -0x40(%KEYP), %KEY
movups -0x40(%KEYP), %KEY
aesenc %KEY, %STATE
movaps -0x30(%KEYP), %KEY
movups -0x30(%KEYP), %KEY
aesenc %KEY, %STATE
.align 4
.Lenc128:
// AES 128, 192, and 256
movaps -0x20(%KEYP), %KEY
movups -0x20(%KEYP), %KEY
aesenc %KEY, %STATE
movaps -0x10(%KEYP), %KEY
movups -0x10(%KEYP), %KEY
aesenc %KEY, %STATE
movaps (%KEYP), %KEY
movups (%KEYP), %KEY
aesenc %KEY, %STATE
movaps 0x10(%KEYP), %KEY
movups 0x10(%KEYP), %KEY
aesenc %KEY, %STATE
movaps 0x20(%KEYP), %KEY
movups 0x20(%KEYP), %KEY
aesenc %KEY, %STATE
movaps 0x30(%KEYP), %KEY
movups 0x30(%KEYP), %KEY
aesenc %KEY, %STATE
movaps 0x40(%KEYP), %KEY
movups 0x40(%KEYP), %KEY
aesenc %KEY, %STATE
movaps 0x50(%KEYP), %KEY
movups 0x50(%KEYP), %KEY
aesenc %KEY, %STATE
movaps 0x60(%KEYP), %KEY
movups 0x60(%KEYP), %KEY
aesenc %KEY, %STATE
movaps 0x70(%KEYP), %KEY
movups 0x70(%KEYP), %KEY
aesenclast %KEY, %STATE // last round
movups %STATE, (%OUTP) // output
@ -685,7 +685,7 @@ ENTRY_NP(aes_encrypt_intel)
ENTRY_NP(aes_decrypt_intel)
movups (%INP), %STATE // input
movaps (%KEYP), %KEY // key
movups (%KEYP), %KEY // key
#ifdef OPENSSL_INTERFACE
mov 240(%KEYP), %NROUNDS32 // round count
#else /* OpenSolaris Interface */
@ -701,41 +701,41 @@ ENTRY_NP(aes_decrypt_intel)
// AES 256
lea 0x20(%KEYP), %KEYP
movaps -0x60(%KEYP), %KEY
movups -0x60(%KEYP), %KEY
aesdec %KEY, %STATE
movaps -0x50(%KEYP), %KEY
movups -0x50(%KEYP), %KEY
aesdec %KEY, %STATE
.align 4
.Ldec192:
// AES 192 and 256
movaps -0x40(%KEYP), %KEY
movups -0x40(%KEYP), %KEY
aesdec %KEY, %STATE
movaps -0x30(%KEYP), %KEY
movups -0x30(%KEYP), %KEY
aesdec %KEY, %STATE
.align 4
.Ldec128:
// AES 128, 192, and 256
movaps -0x20(%KEYP), %KEY
movups -0x20(%KEYP), %KEY
aesdec %KEY, %STATE
movaps -0x10(%KEYP), %KEY
movups -0x10(%KEYP), %KEY
aesdec %KEY, %STATE
movaps (%KEYP), %KEY
movups (%KEYP), %KEY
aesdec %KEY, %STATE
movaps 0x10(%KEYP), %KEY
movups 0x10(%KEYP), %KEY
aesdec %KEY, %STATE
movaps 0x20(%KEYP), %KEY
movups 0x20(%KEYP), %KEY
aesdec %KEY, %STATE
movaps 0x30(%KEYP), %KEY
movups 0x30(%KEYP), %KEY
aesdec %KEY, %STATE
movaps 0x40(%KEYP), %KEY
movups 0x40(%KEYP), %KEY
aesdec %KEY, %STATE
movaps 0x50(%KEYP), %KEY
movups 0x50(%KEYP), %KEY
aesdec %KEY, %STATE
movaps 0x60(%KEYP), %KEY
movups 0x60(%KEYP), %KEY
aesdec %KEY, %STATE
movaps 0x70(%KEYP), %KEY
movups 0x70(%KEYP), %KEY
aesdeclast %KEY, %STATE // last round
movups %STATE, (%OUTP) // output

2
module/icp/asm-x86_64/modes/gcm_intel.S
View File

@ -150,7 +150,7 @@ ENTRY_NP(gcm_mul_pclmulqdq)
// Byte swap 16-byte input
//
lea .Lbyte_swap16_mask(%rip), %rax
movaps (%rax), %xmm10
movups (%rax), %xmm10
pshufb %xmm10, %xmm0
pshufb %xmm10, %xmm1