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authorLinus Torvalds <torvalds@linux-foundation.org>2017-07-05 12:22:23 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2017-07-05 12:22:23 -0700
commit8ad06e56dcbc1984ef0ff8f6e3c19982c5809f73 (patch)
tree74bc746a4f18eeddfc085b76c776ddcf2c798cfa /arch/x86
parent59005b0c59a164101b0273e4bda212c809dc2246 (diff)
parent035f901eac4d2d0fd40f3055026355d55d46949f (diff)
Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto updates from Herbert Xu: "Algorithms: - add private key generation to ecdh Drivers: - add generic gcm(aes) to aesni-intel - add SafeXcel EIP197 crypto engine driver - add ecb(aes), cfb(aes) and ecb(des3_ede) to cavium - add support for CNN55XX adapters in cavium - add ctr mode to chcr - add support for gcm(aes) to omap" * 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (140 commits) crypto: testmgr - Reenable sha1/aes in FIPS mode crypto: ccp - Release locks before returning crypto: cavium/nitrox - dma_mapping_error() returns bool crypto: doc - fix typo in docs Documentation/bindings: Document the SafeXel cryptographic engine driver crypto: caam - fix gfp allocation flags (part II) crypto: caam - fix gfp allocation flags (part I) crypto: drbg - Fixes panic in wait_for_completion call crypto: caam - make of_device_ids const. crypto: vmx - remove unnecessary check crypto: n2 - make of_device_ids const crypto: inside-secure - use the base_end pointer in ring rollback crypto: inside-secure - increase the batch size crypto: inside-secure - only dequeue when needed crypto: inside-secure - get the backlog before dequeueing the request crypto: inside-secure - stop requeueing failed requests crypto: inside-secure - use one queue per hw ring crypto: inside-secure - update the context and request later crypto: inside-secure - align the cipher and hash send functions crypto: inside-secure - optimize DSE bufferability control ...
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/crypto/aes-x86_64-asm_64.S47
-rw-r--r--arch/x86/crypto/aesni-intel_asm.S231
-rw-r--r--arch/x86/crypto/aesni-intel_avx-x86_64.S283
-rw-r--r--arch/x86/crypto/aesni-intel_glue.c208
-rw-r--r--arch/x86/crypto/glue_helper.c3
-rw-r--r--arch/x86/crypto/sha512-mb/sha512_mb.c7
6 files changed, 565 insertions, 214 deletions
diff --git a/arch/x86/crypto/aes-x86_64-asm_64.S b/arch/x86/crypto/aes-x86_64-asm_64.S
index 910565547163..8739cf7795de 100644
--- a/arch/x86/crypto/aes-x86_64-asm_64.S
+++ b/arch/x86/crypto/aes-x86_64-asm_64.S
@@ -42,17 +42,15 @@
#define R5E %esi
#define R6 %rdi
#define R6E %edi
-#define R7 %rbp
-#define R7E %ebp
+#define R7 %r9 /* don't use %rbp; it breaks stack traces */
+#define R7E %r9d
#define R8 %r8
-#define R9 %r9
#define R10 %r10
#define R11 %r11
-#define prologue(FUNC,KEY,B128,B192,r1,r2,r3,r4,r5,r6,r7,r8,r9,r10,r11) \
+#define prologue(FUNC,KEY,B128,B192,r1,r2,r5,r6,r7,r8,r9,r10,r11) \
ENTRY(FUNC); \
movq r1,r2; \
- movq r3,r4; \
leaq KEY+48(r8),r9; \
movq r10,r11; \
movl (r7),r5 ## E; \
@@ -70,9 +68,8 @@
je B192; \
leaq 32(r9),r9;
-#define epilogue(FUNC,r1,r2,r3,r4,r5,r6,r7,r8,r9) \
+#define epilogue(FUNC,r1,r2,r5,r6,r7,r8,r9) \
movq r1,r2; \
- movq r3,r4; \
movl r5 ## E,(r9); \
movl r6 ## E,4(r9); \
movl r7 ## E,8(r9); \
@@ -88,12 +85,12 @@
movl TAB(,r6,4),r6 ## E; \
roll $16,r2 ## E; \
shrl $16,r4 ## E; \
- movzbl r4 ## H,r7 ## E; \
- movzbl r4 ## L,r4 ## E; \
+ movzbl r4 ## L,r7 ## E; \
+ movzbl r4 ## H,r4 ## E; \
xorl OFFSET(r8),ra ## E; \
xorl OFFSET+4(r8),rb ## E; \
- xorl TAB+3072(,r7,4),r5 ## E;\
- xorl TAB+2048(,r4,4),r6 ## E;\
+ xorl TAB+3072(,r4,4),r5 ## E;\
+ xorl TAB+2048(,r7,4),r6 ## E;\
movzbl r1 ## L,r7 ## E; \
movzbl r1 ## H,r4 ## E; \
movl TAB+1024(,r4,4),r4 ## E;\
@@ -101,19 +98,19 @@
roll $16,r1 ## E; \
shrl $16,r3 ## E; \
xorl TAB(,r7,4),r5 ## E; \
- movzbl r3 ## H,r7 ## E; \
- movzbl r3 ## L,r3 ## E; \
- xorl TAB+3072(,r7,4),r4 ## E;\
- xorl TAB+2048(,r3,4),r5 ## E;\
- movzbl r1 ## H,r7 ## E; \
- movzbl r1 ## L,r3 ## E; \
+ movzbl r3 ## L,r7 ## E; \
+ movzbl r3 ## H,r3 ## E; \
+ xorl TAB+3072(,r3,4),r4 ## E;\
+ xorl TAB+2048(,r7,4),r5 ## E;\
+ movzbl r1 ## L,r7 ## E; \
+ movzbl r1 ## H,r3 ## E; \
shrl $16,r1 ## E; \
- xorl TAB+3072(,r7,4),r6 ## E;\
- movl TAB+2048(,r3,4),r3 ## E;\
- movzbl r1 ## H,r7 ## E; \
- movzbl r1 ## L,r1 ## E; \
- xorl TAB+1024(,r7,4),r6 ## E;\
- xorl TAB(,r1,4),r3 ## E; \
+ xorl TAB+3072(,r3,4),r6 ## E;\
+ movl TAB+2048(,r7,4),r3 ## E;\
+ movzbl r1 ## L,r7 ## E; \
+ movzbl r1 ## H,r1 ## E; \
+ xorl TAB+1024(,r1,4),r6 ## E;\
+ xorl TAB(,r7,4),r3 ## E; \
movzbl r2 ## H,r1 ## E; \
movzbl r2 ## L,r7 ## E; \
shrl $16,r2 ## E; \
@@ -131,9 +128,9 @@
movl r4 ## E,r2 ## E;
#define entry(FUNC,KEY,B128,B192) \
- prologue(FUNC,KEY,B128,B192,R2,R8,R7,R9,R1,R3,R4,R6,R10,R5,R11)
+ prologue(FUNC,KEY,B128,B192,R2,R8,R1,R3,R4,R6,R10,R5,R11)
-#define return(FUNC) epilogue(FUNC,R8,R2,R9,R7,R5,R6,R3,R4,R11)
+#define return(FUNC) epilogue(FUNC,R8,R2,R5,R6,R3,R4,R11)
#define encrypt_round(TAB,OFFSET) \
round(TAB,OFFSET,R1,R2,R3,R4,R5,R6,R7,R10,R5,R6,R3,R4) \
diff --git a/arch/x86/crypto/aesni-intel_asm.S b/arch/x86/crypto/aesni-intel_asm.S
index 3c465184ff8a..16627fec80b2 100644
--- a/arch/x86/crypto/aesni-intel_asm.S
+++ b/arch/x86/crypto/aesni-intel_asm.S
@@ -89,6 +89,29 @@ SHIFT_MASK: .octa 0x0f0e0d0c0b0a09080706050403020100
ALL_F: .octa 0xffffffffffffffffffffffffffffffff
.octa 0x00000000000000000000000000000000
+.section .rodata
+.align 16
+.type aad_shift_arr, @object
+.size aad_shift_arr, 272
+aad_shift_arr:
+ .octa 0xffffffffffffffffffffffffffffffff
+ .octa 0xffffffffffffffffffffffffffffff0C
+ .octa 0xffffffffffffffffffffffffffff0D0C
+ .octa 0xffffffffffffffffffffffffff0E0D0C
+ .octa 0xffffffffffffffffffffffff0F0E0D0C
+ .octa 0xffffffffffffffffffffff0C0B0A0908
+ .octa 0xffffffffffffffffffff0D0C0B0A0908
+ .octa 0xffffffffffffffffff0E0D0C0B0A0908
+ .octa 0xffffffffffffffff0F0E0D0C0B0A0908
+ .octa 0xffffffffffffff0C0B0A090807060504
+ .octa 0xffffffffffff0D0C0B0A090807060504
+ .octa 0xffffffffff0E0D0C0B0A090807060504
+ .octa 0xffffffff0F0E0D0C0B0A090807060504
+ .octa 0xffffff0C0B0A09080706050403020100
+ .octa 0xffff0D0C0B0A09080706050403020100
+ .octa 0xff0E0D0C0B0A09080706050403020100
+ .octa 0x0F0E0D0C0B0A09080706050403020100
+
.text
@@ -252,32 +275,66 @@ XMM2 XMM3 XMM4 XMMDst TMP6 TMP7 i i_seq operation
mov arg8, %r12 # %r12 = aadLen
mov %r12, %r11
pxor %xmm\i, %xmm\i
+ pxor \XMM2, \XMM2
-_get_AAD_loop\num_initial_blocks\operation:
- movd (%r10), \TMP1
- pslldq $12, \TMP1
- psrldq $4, %xmm\i
+ cmp $16, %r11
+ jl _get_AAD_rest8\num_initial_blocks\operation
+_get_AAD_blocks\num_initial_blocks\operation:
+ movdqu (%r10), %xmm\i
+ PSHUFB_XMM %xmm14, %xmm\i # byte-reflect the AAD data
+ pxor %xmm\i, \XMM2
+ GHASH_MUL \XMM2, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
+ add $16, %r10
+ sub $16, %r12
+ sub $16, %r11
+ cmp $16, %r11
+ jge _get_AAD_blocks\num_initial_blocks\operation
+
+ movdqu \XMM2, %xmm\i
+ cmp $0, %r11
+ je _get_AAD_done\num_initial_blocks\operation
+
+ pxor %xmm\i,%xmm\i
+
+ /* read the last <16B of AAD. since we have at least 4B of
+ data right after the AAD (the ICV, and maybe some CT), we can
+ read 4B/8B blocks safely, and then get rid of the extra stuff */
+_get_AAD_rest8\num_initial_blocks\operation:
+ cmp $4, %r11
+ jle _get_AAD_rest4\num_initial_blocks\operation
+ movq (%r10), \TMP1
+ add $8, %r10
+ sub $8, %r11
+ pslldq $8, \TMP1
+ psrldq $8, %xmm\i
pxor \TMP1, %xmm\i
+ jmp _get_AAD_rest8\num_initial_blocks\operation
+_get_AAD_rest4\num_initial_blocks\operation:
+ cmp $0, %r11
+ jle _get_AAD_rest0\num_initial_blocks\operation
+ mov (%r10), %eax
+ movq %rax, \TMP1
add $4, %r10
- sub $4, %r12
- jne _get_AAD_loop\num_initial_blocks\operation
-
- cmp $16, %r11
- je _get_AAD_loop2_done\num_initial_blocks\operation
-
- mov $16, %r12
-_get_AAD_loop2\num_initial_blocks\operation:
+ sub $4, %r10
+ pslldq $12, \TMP1
psrldq $4, %xmm\i
- sub $4, %r12
- cmp %r11, %r12
- jne _get_AAD_loop2\num_initial_blocks\operation
-
-_get_AAD_loop2_done\num_initial_blocks\operation:
+ pxor \TMP1, %xmm\i
+_get_AAD_rest0\num_initial_blocks\operation:
+ /* finalize: shift out the extra bytes we read, and align
+ left. since pslldq can only shift by an immediate, we use
+ vpshufb and an array of shuffle masks */
+ movq %r12, %r11
+ salq $4, %r11
+ movdqu aad_shift_arr(%r11), \TMP1
+ PSHUFB_XMM \TMP1, %xmm\i
+_get_AAD_rest_final\num_initial_blocks\operation:
PSHUFB_XMM %xmm14, %xmm\i # byte-reflect the AAD data
+ pxor \XMM2, %xmm\i
+ GHASH_MUL %xmm\i, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
+_get_AAD_done\num_initial_blocks\operation:
xor %r11, %r11 # initialise the data pointer offset as zero
-
- # start AES for num_initial_blocks blocks
+ # start AES for num_initial_blocks blocks
mov %arg5, %rax # %rax = *Y0
movdqu (%rax), \XMM0 # XMM0 = Y0
@@ -322,7 +379,7 @@ aes_loop_initial_dec\num_initial_blocks:
# prepare plaintext/ciphertext for GHASH computation
.endr
.endif
- GHASH_MUL %xmm\i, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
+
# apply GHASH on num_initial_blocks blocks
.if \i == 5
@@ -477,28 +534,66 @@ XMM2 XMM3 XMM4 XMMDst TMP6 TMP7 i i_seq operation
mov arg8, %r12 # %r12 = aadLen
mov %r12, %r11
pxor %xmm\i, %xmm\i
-_get_AAD_loop\num_initial_blocks\operation:
- movd (%r10), \TMP1
- pslldq $12, \TMP1
- psrldq $4, %xmm\i
+ pxor \XMM2, \XMM2
+
+ cmp $16, %r11
+ jl _get_AAD_rest8\num_initial_blocks\operation
+_get_AAD_blocks\num_initial_blocks\operation:
+ movdqu (%r10), %xmm\i
+ PSHUFB_XMM %xmm14, %xmm\i # byte-reflect the AAD data
+ pxor %xmm\i, \XMM2
+ GHASH_MUL \XMM2, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
+ add $16, %r10
+ sub $16, %r12
+ sub $16, %r11
+ cmp $16, %r11
+ jge _get_AAD_blocks\num_initial_blocks\operation
+
+ movdqu \XMM2, %xmm\i
+ cmp $0, %r11
+ je _get_AAD_done\num_initial_blocks\operation
+
+ pxor %xmm\i,%xmm\i
+
+ /* read the last <16B of AAD. since we have at least 4B of
+ data right after the AAD (the ICV, and maybe some PT), we can
+ read 4B/8B blocks safely, and then get rid of the extra stuff */
+_get_AAD_rest8\num_initial_blocks\operation:
+ cmp $4, %r11
+ jle _get_AAD_rest4\num_initial_blocks\operation
+ movq (%r10), \TMP1
+ add $8, %r10
+ sub $8, %r11
+ pslldq $8, \TMP1
+ psrldq $8, %xmm\i
pxor \TMP1, %xmm\i
+ jmp _get_AAD_rest8\num_initial_blocks\operation
+_get_AAD_rest4\num_initial_blocks\operation:
+ cmp $0, %r11
+ jle _get_AAD_rest0\num_initial_blocks\operation
+ mov (%r10), %eax
+ movq %rax, \TMP1
add $4, %r10
- sub $4, %r12
- jne _get_AAD_loop\num_initial_blocks\operation
- cmp $16, %r11
- je _get_AAD_loop2_done\num_initial_blocks\operation
- mov $16, %r12
-_get_AAD_loop2\num_initial_blocks\operation:
+ sub $4, %r10
+ pslldq $12, \TMP1
psrldq $4, %xmm\i
- sub $4, %r12
- cmp %r11, %r12
- jne _get_AAD_loop2\num_initial_blocks\operation
-_get_AAD_loop2_done\num_initial_blocks\operation:
+ pxor \TMP1, %xmm\i
+_get_AAD_rest0\num_initial_blocks\operation:
+ /* finalize: shift out the extra bytes we read, and align
+ left. since pslldq can only shift by an immediate, we use
+ vpshufb and an array of shuffle masks */
+ movq %r12, %r11
+ salq $4, %r11
+ movdqu aad_shift_arr(%r11), \TMP1
+ PSHUFB_XMM \TMP1, %xmm\i
+_get_AAD_rest_final\num_initial_blocks\operation:
PSHUFB_XMM %xmm14, %xmm\i # byte-reflect the AAD data
+ pxor \XMM2, %xmm\i
+ GHASH_MUL %xmm\i, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
+_get_AAD_done\num_initial_blocks\operation:
xor %r11, %r11 # initialise the data pointer offset as zero
-
- # start AES for num_initial_blocks blocks
+ # start AES for num_initial_blocks blocks
mov %arg5, %rax # %rax = *Y0
movdqu (%rax), \XMM0 # XMM0 = Y0
@@ -543,7 +638,7 @@ aes_loop_initial_enc\num_initial_blocks:
# prepare plaintext/ciphertext for GHASH computation
.endr
.endif
- GHASH_MUL %xmm\i, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
+
# apply GHASH on num_initial_blocks blocks
.if \i == 5
@@ -1454,18 +1549,35 @@ _return_T_decrypt:
mov arg10, %r11 # %r11 = auth_tag_len
cmp $16, %r11
je _T_16_decrypt
- cmp $12, %r11
- je _T_12_decrypt
+ cmp $8, %r11
+ jl _T_4_decrypt
_T_8_decrypt:
MOVQ_R64_XMM %xmm0, %rax
mov %rax, (%r10)
- jmp _return_T_done_decrypt
-_T_12_decrypt:
- MOVQ_R64_XMM %xmm0, %rax
- mov %rax, (%r10)
+ add $8, %r10
+ sub $8, %r11
psrldq $8, %xmm0
+ cmp $0, %r11
+ je _return_T_done_decrypt
+_T_4_decrypt:
+ movd %xmm0, %eax
+ mov %eax, (%r10)
+ add $4, %r10
+ sub $4, %r11
+ psrldq $4, %xmm0
+ cmp $0, %r11
+ je _return_T_done_decrypt
+_T_123_decrypt:
movd %xmm0, %eax
- mov %eax, 8(%r10)
+ cmp $2, %r11
+ jl _T_1_decrypt
+ mov %ax, (%r10)
+ cmp $2, %r11
+ je _return_T_done_decrypt
+ add $2, %r10
+ sar $16, %eax
+_T_1_decrypt:
+ mov %al, (%r10)
jmp _return_T_done_decrypt
_T_16_decrypt:
movdqu %xmm0, (%r10)
@@ -1718,18 +1830,35 @@ _return_T_encrypt:
mov arg10, %r11 # %r11 = auth_tag_len
cmp $16, %r11
je _T_16_encrypt
- cmp $12, %r11
- je _T_12_encrypt
+ cmp $8, %r11
+ jl _T_4_encrypt
_T_8_encrypt:
MOVQ_R64_XMM %xmm0, %rax
mov %rax, (%r10)
- jmp _return_T_done_encrypt
-_T_12_encrypt:
- MOVQ_R64_XMM %xmm0, %rax
- mov %rax, (%r10)
+ add $8, %r10
+ sub $8, %r11
psrldq $8, %xmm0
+ cmp $0, %r11
+ je _return_T_done_encrypt
+_T_4_encrypt:
+ movd %xmm0, %eax
+ mov %eax, (%r10)
+ add $4, %r10
+ sub $4, %r11
+ psrldq $4, %xmm0
+ cmp $0, %r11
+ je _return_T_done_encrypt
+_T_123_encrypt:
movd %xmm0, %eax
- mov %eax, 8(%r10)
+ cmp $2, %r11
+ jl _T_1_encrypt
+ mov %ax, (%r10)
+ cmp $2, %r11
+ je _return_T_done_encrypt
+ add $2, %r10
+ sar $16, %eax
+_T_1_encrypt:
+ mov %al, (%r10)
jmp _return_T_done_encrypt
_T_16_encrypt:
movdqu %xmm0, (%r10)
diff --git a/arch/x86/crypto/aesni-intel_avx-x86_64.S b/arch/x86/crypto/aesni-intel_avx-x86_64.S
index d664382c6e56..faecb1518bf8 100644
--- a/arch/x86/crypto/aesni-intel_avx-x86_64.S
+++ b/arch/x86/crypto/aesni-intel_avx-x86_64.S
@@ -155,6 +155,30 @@ SHIFT_MASK: .octa 0x0f0e0d0c0b0a09080706050403020100
ALL_F: .octa 0xffffffffffffffffffffffffffffffff
.octa 0x00000000000000000000000000000000
+.section .rodata
+.align 16
+.type aad_shift_arr, @object
+.size aad_shift_arr, 272
+aad_shift_arr:
+ .octa 0xffffffffffffffffffffffffffffffff
+ .octa 0xffffffffffffffffffffffffffffff0C
+ .octa 0xffffffffffffffffffffffffffff0D0C
+ .octa 0xffffffffffffffffffffffffff0E0D0C
+ .octa 0xffffffffffffffffffffffff0F0E0D0C
+ .octa 0xffffffffffffffffffffff0C0B0A0908
+ .octa 0xffffffffffffffffffff0D0C0B0A0908
+ .octa 0xffffffffffffffffff0E0D0C0B0A0908
+ .octa 0xffffffffffffffff0F0E0D0C0B0A0908
+ .octa 0xffffffffffffff0C0B0A090807060504
+ .octa 0xffffffffffff0D0C0B0A090807060504
+ .octa 0xffffffffff0E0D0C0B0A090807060504
+ .octa 0xffffffff0F0E0D0C0B0A090807060504
+ .octa 0xffffff0C0B0A09080706050403020100
+ .octa 0xffff0D0C0B0A09080706050403020100
+ .octa 0xff0E0D0C0B0A09080706050403020100
+ .octa 0x0F0E0D0C0B0A09080706050403020100
+
+
.text
@@ -372,41 +396,72 @@ VARIABLE_OFFSET = 16*8
.macro INITIAL_BLOCKS_AVX num_initial_blocks T1 T2 T3 T4 T5 CTR XMM1 XMM2 XMM3 XMM4 XMM5 XMM6 XMM7 XMM8 T6 T_key ENC_DEC
i = (8-\num_initial_blocks)
+ j = 0
setreg
- mov arg6, %r10 # r10 = AAD
- mov arg7, %r12 # r12 = aadLen
-
-
- mov %r12, %r11
-
- vpxor reg_i, reg_i, reg_i
-_get_AAD_loop\@:
- vmovd (%r10), \T1
- vpslldq $12, \T1, \T1
- vpsrldq $4, reg_i, reg_i
- vpxor \T1, reg_i, reg_i
-
- add $4, %r10
- sub $4, %r12
- jg _get_AAD_loop\@
-
-
- cmp $16, %r11
- je _get_AAD_loop2_done\@
- mov $16, %r12
-
-_get_AAD_loop2\@:
- vpsrldq $4, reg_i, reg_i
- sub $4, %r12
- cmp %r11, %r12
- jg _get_AAD_loop2\@
-
-_get_AAD_loop2_done\@:
-
- #byte-reflect the AAD data
- vpshufb SHUF_MASK(%rip), reg_i, reg_i
-
+ mov arg6, %r10 # r10 = AAD
+ mov arg7, %r12 # r12 = aadLen
+
+
+ mov %r12, %r11
+
+ vpxor reg_j, reg_j, reg_j
+ vpxor reg_i, reg_i, reg_i
+ cmp $16, %r11
+ jl _get_AAD_rest8\@
+_get_AAD_blocks\@:
+ vmovdqu (%r10), reg_i
+ vpshufb SHUF_MASK(%rip), reg_i, reg_i
+ vpxor reg_i, reg_j, reg_j
+ GHASH_MUL_AVX reg_j, \T2, \T1, \T3, \T4, \T5, \T6
+ add $16, %r10
+ sub $16, %r12
+ sub $16, %r11
+ cmp $16, %r11
+ jge _get_AAD_blocks\@
+ vmovdqu reg_j, reg_i
+ cmp $0, %r11
+ je _get_AAD_done\@
+
+ vpxor reg_i, reg_i, reg_i
+
+ /* read the last <16B of AAD. since we have at least 4B of
+ data right after the AAD (the ICV, and maybe some CT), we can
+ read 4B/8B blocks safely, and then get rid of the extra stuff */
+_get_AAD_rest8\@:
+ cmp $4, %r11
+ jle _get_AAD_rest4\@
+ movq (%r10), \T1
+ add $8, %r10
+ sub $8, %r11
+ vpslldq $8, \T1, \T1
+ vpsrldq $8, reg_i, reg_i
+ vpxor \T1, reg_i, reg_i
+ jmp _get_AAD_rest8\@
+_get_AAD_rest4\@:
+ cmp $0, %r11
+ jle _get_AAD_rest0\@
+ mov (%r10), %eax
+ movq %rax, \T1
+ add $4, %r10
+ sub $4, %r11
+ vpslldq $12, \T1, \T1
+ vpsrldq $4, reg_i, reg_i
+ vpxor \T1, reg_i, reg_i
+_get_AAD_rest0\@:
+ /* finalize: shift out the extra bytes we read, and align
+ left. since pslldq can only shift by an immediate, we use
+ vpshufb and an array of shuffle masks */
+ movq %r12, %r11
+ salq $4, %r11
+ movdqu aad_shift_arr(%r11), \T1
+ vpshufb \T1, reg_i, reg_i
+_get_AAD_rest_final\@:
+ vpshufb SHUF_MASK(%rip), reg_i, reg_i
+ vpxor reg_j, reg_i, reg_i
+ GHASH_MUL_AVX reg_i, \T2, \T1, \T3, \T4, \T5, \T6
+
+_get_AAD_done\@:
# initialize the data pointer offset as zero
xor %r11, %r11
@@ -480,7 +535,6 @@ _get_AAD_loop2_done\@:
i = (8-\num_initial_blocks)
j = (9-\num_initial_blocks)
setreg
- GHASH_MUL_AVX reg_i, \T2, \T1, \T3, \T4, \T5, \T6
.rep \num_initial_blocks
vpxor reg_i, reg_j, reg_j
@@ -1427,19 +1481,36 @@ _return_T\@:
cmp $16, %r11
je _T_16\@
- cmp $12, %r11
- je _T_12\@
+ cmp $8, %r11
+ jl _T_4\@
_T_8\@:
vmovq %xmm9, %rax
mov %rax, (%r10)
- jmp _return_T_done\@
-_T_12\@:
- vmovq %xmm9, %rax
- mov %rax, (%r10)
+ add $8, %r10
+ sub $8, %r11
vpsrldq $8, %xmm9, %xmm9
+ cmp $0, %r11
+ je _return_T_done\@
+_T_4\@:
vmovd %xmm9, %eax
- mov %eax, 8(%r10)
+ mov %eax, (%r10)
+ add $4, %r10
+ sub $4, %r11
+ vpsrldq $4, %xmm9, %xmm9
+ cmp $0, %r11
+ je _return_T_done\@
+_T_123\@:
+ vmovd %xmm9, %eax
+ cmp $2, %r11
+ jl _T_1\@
+ mov %ax, (%r10)
+ cmp $2, %r11
+ je _return_T_done\@
+ add $2, %r10
+ sar $16, %eax
+_T_1\@:
+ mov %al, (%r10)
jmp _return_T_done\@
_T_16\@:
@@ -1631,41 +1702,73 @@ ENDPROC(aesni_gcm_dec_avx_gen2)
.macro INITIAL_BLOCKS_AVX2 num_initial_blocks T1 T2 T3 T4 T5 CTR XMM1 XMM2 XMM3 XMM4 XMM5 XMM6 XMM7 XMM8 T6 T_key ENC_DEC VER
i = (8-\num_initial_blocks)
+ j = 0
setreg
- mov arg6, %r10 # r10 = AAD
- mov arg7, %r12 # r12 = aadLen
-
-
- mov %r12, %r11
-
- vpxor reg_i, reg_i, reg_i
-_get_AAD_loop\@:
- vmovd (%r10), \T1
- vpslldq $12, \T1, \T1
- vpsrldq $4, reg_i, reg_i
- vpxor \T1, reg_i, reg_i
-
- add $4, %r10
- sub $4, %r12
- jg _get_AAD_loop\@
-
-
- cmp $16, %r11
- je _get_AAD_loop2_done\@
- mov $16, %r12
-
-_get_AAD_loop2\@:
- vpsrldq $4, reg_i, reg_i
- sub $4, %r12
- cmp %r11, %r12
- jg _get_AAD_loop2\@
-
-_get_AAD_loop2_done\@:
-
- #byte-reflect the AAD data
- vpshufb SHUF_MASK(%rip), reg_i, reg_i
-
+ mov arg6, %r10 # r10 = AAD
+ mov arg7, %r12 # r12 = aadLen
+
+
+ mov %r12, %r11
+
+ vpxor reg_j, reg_j, reg_j
+ vpxor reg_i, reg_i, reg_i
+
+ cmp $16, %r11
+ jl _get_AAD_rest8\@
+_get_AAD_blocks\@:
+ vmovdqu (%r10), reg_i
+ vpshufb SHUF_MASK(%rip), reg_i, reg_i
+ vpxor reg_i, reg_j, reg_j
+ GHASH_MUL_AVX2 reg_j, \T2, \T1, \T3, \T4, \T5, \T6
+ add $16, %r10
+ sub $16, %r12
+ sub $16, %r11
+ cmp $16, %r11
+ jge _get_AAD_blocks\@
+ vmovdqu reg_j, reg_i
+ cmp $0, %r11
+ je _get_AAD_done\@
+
+ vpxor reg_i, reg_i, reg_i
+
+ /* read the last <16B of AAD. since we have at least 4B of
+ data right after the AAD (the ICV, and maybe some CT), we can
+ read 4B/8B blocks safely, and then get rid of the extra stuff */
+_get_AAD_rest8\@:
+ cmp $4, %r11
+ jle _get_AAD_rest4\@
+ movq (%r10), \T1
+ add $8, %r10
+ sub $8, %r11
+ vpslldq $8, \T1, \T1
+ vpsrldq $8, reg_i, reg_i
+ vpxor \T1, reg_i, reg_i
+ jmp _get_AAD_rest8\@
+_get_AAD_rest4\@:
+ cmp $0, %r11
+ jle _get_AAD_rest0\@
+ mov (%r10), %eax
+ movq %rax, \T1
+ add $4, %r10
+ sub $4, %r11
+ vpslldq $12, \T1, \T1
+ vpsrldq $4, reg_i, reg_i
+ vpxor \T1, reg_i, reg_i
+_get_AAD_rest0\@:
+ /* finalize: shift out the extra bytes we read, and align
+ left. since pslldq can only shift by an immediate, we use
+ vpshufb and an array of shuffle masks */
+ movq %r12, %r11
+ salq $4, %r11
+ movdqu aad_shift_arr(%r11), \T1
+ vpshufb \T1, reg_i, reg_i
+_get_AAD_rest_final\@:
+ vpshufb SHUF_MASK(%rip), reg_i, reg_i
+ vpxor reg_j, reg_i, reg_i
+ GHASH_MUL_AVX2 reg_i, \T2, \T1, \T3, \T4, \T5, \T6
+
+_get_AAD_done\@:
# initialize the data pointer offset as zero
xor %r11, %r11
@@ -1740,7 +1843,6 @@ _get_AAD_loop2_done\@:
i = (8-\num_initial_blocks)
j = (9-\num_initial_blocks)
setreg
- GHASH_MUL_AVX2 reg_i, \T2, \T1, \T3, \T4, \T5, \T6
.rep \num_initial_blocks
vpxor reg_i, reg_j, reg_j
@@ -2702,19 +2804,36 @@ _return_T\@:
cmp $16, %r11
je _T_16\@
- cmp $12, %r11
- je _T_12\@
+ cmp $8, %r11
+ jl _T_4\@
_T_8\@:
vmovq %xmm9, %rax
mov %rax, (%r10)
- jmp _return_T_done\@
-_T_12\@:
- vmovq %xmm9, %rax
- mov %rax, (%r10)
+ add $8, %r10
+ sub $8, %r11
vpsrldq $8, %xmm9, %xmm9
+ cmp $0, %r11
+ je _return_T_done\@
+_T_4\@:
vmovd %xmm9, %eax
- mov %eax, 8(%r10)
+ mov %eax, (%r10)
+ add $4, %r10
+ sub $4, %r11
+ vpsrldq $4, %xmm9, %xmm9
+ cmp $0, %r11
+ je _return_T_done\@
+_T_123\@:
+ vmovd %xmm9, %eax
+ cmp $2, %r11
+ jl _T_1\@
+ mov %ax, (%r10)
+ cmp $2, %r11
+ je _return_T_done\@
+ add $2, %r10
+ sar $16, %eax
+_T_1\@:
+ mov %al, (%r10)
jmp _return_T_done\@
_T_16\@:
diff --git a/arch/x86/crypto/aesni-intel_glue.c b/arch/x86/crypto/aesni-intel_glue.c
index 93de8ea51548..4a55cdcdc008 100644
--- a/arch/x86/crypto/aesni-intel_glue.c
+++ b/arch/x86/crypto/aesni-intel_glue.c
@@ -61,6 +61,11 @@ struct aesni_rfc4106_gcm_ctx {
u8 nonce[4];
};
+struct generic_gcmaes_ctx {
+ u8 hash_subkey[16] AESNI_ALIGN_ATTR;
+ struct crypto_aes_ctx aes_key_expanded AESNI_ALIGN_ATTR;
+};
+
struct aesni_xts_ctx {
u8 raw_tweak_ctx[sizeof(struct crypto_aes_ctx)] AESNI_ALIGN_ATTR;
u8 raw_crypt_ctx[sizeof(struct crypto_aes_ctx)] AESNI_ALIGN_ATTR;
@@ -102,13 +107,11 @@ asmlinkage void aesni_xts_crypt8(struct crypto_aes_ctx *ctx, u8 *out,
* u8 *out, Ciphertext output. Encrypt in-place is allowed.
* const u8 *in, Plaintext input
* unsigned long plaintext_len, Length of data in bytes for encryption.
- * u8 *iv, Pre-counter block j0: 4 byte salt (from Security Association)
- * concatenated with 8 byte Initialisation Vector (from IPSec ESP
- * Payload) concatenated with 0x00000001. 16-byte aligned pointer.
+ * u8 *iv, Pre-counter block j0: 12 byte IV concatenated with 0x00000001.
+ * 16-byte aligned pointer.
* u8 *hash_subkey, the Hash sub key input. Data starts on a 16-byte boundary.
* const u8 *aad, Additional Authentication Data (AAD)
- * unsigned long aad_len, Length of AAD in bytes. With RFC4106 this
- * is going to be 8 or 12 bytes
+ * unsigned long aad_len, Length of AAD in bytes.
* u8 *auth_tag, Authenticated Tag output.
* unsigned long auth_tag_len), Authenticated Tag Length in bytes.
* Valid values are 16 (most likely), 12 or 8.
@@ -123,9 +126,8 @@ asmlinkage void aesni_gcm_enc(void *ctx, u8 *out,
* u8 *out, Plaintext output. Decrypt in-place is allowed.
* const u8 *in, Ciphertext input
* unsigned long ciphertext_len, Length of data in bytes for decryption.
- * u8 *iv, Pre-counter block j0: 4 byte salt (from Security Association)
- * concatenated with 8 byte Initialisation Vector (from IPSec ESP
- * Payload) concatenated with 0x00000001. 16-byte aligned pointer.
+ * u8 *iv, Pre-counter block j0: 12 byte IV concatenated with 0x00000001.
+ * 16-byte aligned pointer.
* u8 *hash_subkey, the Hash sub key input. Data starts on a 16-byte boundary.
* const u8 *aad, Additional Authentication Data (AAD)
* unsigned long aad_len, Length of AAD in bytes. With RFC4106 this is going
@@ -275,6 +277,16 @@ aesni_rfc4106_gcm_ctx *aesni_rfc4106_gcm_ctx_get(struct crypto_aead *tfm)
align = 1;
return PTR_ALIGN(crypto_aead_ctx(tfm), align);
}
+
+static inline struct
+generic_gcmaes_ctx *generic_gcmaes_ctx_get(struct crypto_aead *tfm)
+{
+ unsigned long align = AESNI_ALIGN;
+
+ if (align <= crypto_tfm_ctx_alignment())
+ align = 1;
+ return PTR_ALIGN(crypto_aead_ctx(tfm), align);
+}
#endif
static inline struct crypto_aes_ctx *aes_ctx(void *raw_ctx)
@@ -712,32 +724,34 @@ static int rfc4106_set_authsize(struct crypto_aead *parent,
return crypto_aead_setauthsize(&cryptd_tfm->base, authsize);
}
-static int helper_rfc4106_encrypt(struct aead_request *req)
+static int generic_gcmaes_set_authsize(struct crypto_aead *tfm,
+ unsigned int authsize)
+{
+ switch (authsize) {
+ case 4:
+ case 8:
+ case 12:
+ case 13:
+ case 14:
+ case 15:
+ case 16:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int gcmaes_encrypt(struct aead_request *req, unsigned int assoclen,
+ u8 *hash_subkey, u8 *iv, void *aes_ctx)
{
u8 one_entry_in_sg = 0;
u8 *src, *dst, *assoc;
- __be32 counter = cpu_to_be32(1);
struct crypto_aead *tfm = crypto_aead_reqtfm(req);
- struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(tfm);
- void *aes_ctx = &(ctx->aes_key_expanded);
unsigned long auth_tag_len = crypto_aead_authsize(tfm);
- u8 iv[16] __attribute__ ((__aligned__(AESNI_ALIGN)));
struct scatter_walk src_sg_walk;
struct scatter_walk dst_sg_walk = {};
- unsigned int i;
-
- /* Assuming we are supporting rfc4106 64-bit extended */
- /* sequence numbers We need to have the AAD length equal */
- /* to 16 or 20 bytes */
- if (unlikely(req->assoclen != 16 && req->assoclen != 20))
- return -EINVAL;
-
- /* IV below built */
- for (i = 0; i < 4; i++)
- *(iv+i) = ctx->nonce[i];
- for (i = 0; i < 8; i++)
- *(iv+4+i) = req->iv[i];
- *((__be32 *)(iv+12)) = counter;
if (sg_is_last(req->src) &&
(!PageHighMem(sg_page(req->src)) ||
@@ -768,7 +782,7 @@ static int helper_rfc4106_encrypt(struct aead_request *req)
kernel_fpu_begin();
aesni_gcm_enc_tfm(aes_ctx, dst, src, req->cryptlen, iv,
- ctx->hash_subkey, assoc, req->assoclen - 8,
+ hash_subkey, assoc, assoclen,
dst + req->cryptlen, auth_tag_len);
kernel_fpu_end();
@@ -791,37 +805,20 @@ static int helper_rfc4106_encrypt(struct aead_request *req)
return 0;
}
-static int helper_rfc4106_decrypt(struct aead_request *req)
+static int gcmaes_decrypt(struct aead_request *req, unsigned int assoclen,
+ u8 *hash_subkey, u8 *iv, void *aes_ctx)
{
u8 one_entry_in_sg = 0;
u8 *src, *dst, *assoc;
unsigned long tempCipherLen = 0;
- __be32 counter = cpu_to_be32(1);
- int retval = 0;
struct crypto_aead *tfm = crypto_aead_reqtfm(req);
- struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(tfm);
- void *aes_ctx = &(ctx->aes_key_expanded);
unsigned long auth_tag_len = crypto_aead_authsize(tfm);
- u8 iv[16] __attribute__ ((__aligned__(AESNI_ALIGN)));
u8 authTag[16];
struct scatter_walk src_sg_walk;
struct scatter_walk dst_sg_walk = {};
- unsigned int i;
-
- if (unlikely(req->assoclen != 16 && req->assoclen != 20))
- return -EINVAL;
-
- /* Assuming we are supporting rfc4106 64-bit extended */
- /* sequence numbers We need to have the AAD length */
- /* equal to 16 or 20 bytes */
+ int retval = 0;
tempCipherLen = (unsigned long)(req->cryptlen - auth_tag_len);
- /* IV below built */
- for (i = 0; i < 4; i++)
- *(iv+i) = ctx->nonce[i];
- for (i = 0; i < 8; i++)
- *(iv+4+i) = req->iv[i];
- *((__be32 *)(iv+12)) = counter;
if (sg_is_last(req->src) &&
(!PageHighMem(sg_page(req->src)) ||
@@ -838,7 +835,6 @@ static int helper_rfc4106_decrypt(struct aead_request *req)
scatterwalk_start(&dst_sg_walk, req->dst);
dst = scatterwalk_map(&dst_sg_walk) + req->assoclen;
}
-
} else {
/* Allocate memory for src, dst, assoc */
assoc = kmalloc(req->cryptlen + req->assoclen, GFP_ATOMIC);
@@ -850,9 +846,10 @@ static int helper_rfc4106_decrypt(struct aead_request *req)
dst = src;
}
+
kernel_fpu_begin();
aesni_gcm_dec_tfm(aes_ctx, dst, src, tempCipherLen, iv,
- ctx->hash_subkey, assoc, req->assoclen - 8,
+ hash_subkey, assoc, assoclen,
authTag, auth_tag_len);
kernel_fpu_end();
@@ -875,6 +872,60 @@ static int helper_rfc4106_decrypt(struct aead_request *req)
kfree(assoc);
}
return retval;
+
+}
+
+static int helper_rfc4106_encrypt(struct aead_request *req)
+{
+ struct crypto_aead *tfm = crypto_aead_reqtfm(req);
+ struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(tfm);
+ void *aes_ctx = &(ctx->aes_key_expanded);
+ u8 iv[16] __attribute__ ((__aligned__(AESNI_ALIGN)));
+ unsigned int i;
+ __be32 counter = cpu_to_be32(1);
+
+ /* Assuming we are supporting rfc4106 64-bit extended */
+ /* sequence numbers We need to have the AAD length equal */
+ /* to 16 or 20 bytes */
+ if (unlikely(req->assoclen != 16 && req->assoclen != 20))
+ return -EINVAL;
+
+ /* IV below built */
+ for (i = 0; i < 4; i++)
+ *(iv+i) = ctx->nonce[i];
+ for (i = 0; i < 8; i++)
+ *(iv+4+i) = req->iv[i];
+ *((__be32 *)(iv+12)) = counter;
+
+ return gcmaes_encrypt(req, req->assoclen - 8, ctx->hash_subkey, iv,
+ aes_ctx);
+}
+
+static int helper_rfc4106_decrypt(struct aead_request *req)
+{
+ __be32 counter = cpu_to_be32(1);
+ struct crypto_aead *tfm = crypto_aead_reqtfm(req);
+ struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(tfm);
+ void *aes_ctx = &(ctx->aes_key_expanded);
+ u8 iv[16] __attribute__ ((__aligned__(AESNI_ALIGN)));
+ unsigned int i;
+
+ if (unlikely(req->assoclen != 16 && req->assoclen != 20))
+ return -EINVAL;
+
+ /* Assuming we are supporting rfc4106 64-bit extended */
+ /* sequence numbers We need to have the AAD length */
+ /* equal to 16 or 20 bytes */
+
+ /* IV below built */
+ for (i = 0; i < 4; i++)
+ *(iv+i) = ctx->nonce[i];
+ for (i = 0; i < 8; i++)
+ *(iv+4+i) = req->iv[i];
+ *((__be32 *)(iv+12)) = counter;
+
+ return gcmaes_decrypt(req, req->assoclen - 8, ctx->hash_subkey, iv,
+ aes_ctx);
}
static int rfc4106_encrypt(struct aead_request *req)
@@ -1035,6 +1086,46 @@ struct {
};
#ifdef CONFIG_X86_64
+static int generic_gcmaes_set_key(struct crypto_aead *aead, const u8 *key,
+ unsigned int key_len)
+{
+ struct generic_gcmaes_ctx *ctx = generic_gcmaes_ctx_get(aead);
+
+ return aes_set_key_common(crypto_aead_tfm(aead),
+ &ctx->aes_key_expanded, key, key_len) ?:
+ rfc4106_set_hash_subkey(ctx->hash_subkey, key, key_len);
+}
+
+static int generic_gcmaes_encrypt(struct aead_request *req)
+{
+ struct crypto_aead *tfm = crypto_aead_reqtfm(req);
+ struct generic_gcmaes_ctx *ctx = generic_gcmaes_ctx_get(tfm);
+ void *aes_ctx = &(ctx->aes_key_expanded);
+ u8 iv[16] __attribute__ ((__aligned__(AESNI_ALIGN)));
+ __be32 counter = cpu_to_be32(1);
+
+ memcpy(iv, req->iv, 12);
+ *((__be32 *)(iv+12)) = counter;
+
+ return gcmaes_encrypt(req, req->assoclen, ctx->hash_subkey, iv,
+ aes_ctx);
+}
+
+static int generic_gcmaes_decrypt(struct aead_request *req)
+{
+ __be32 counter = cpu_to_be32(1);
+ struct crypto_aead *tfm = crypto_aead_reqtfm(req);
+ struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(tfm);
+ void *aes_ctx = &(ctx->aes_key_expanded);
+ u8 iv[16] __attribute__ ((__aligned__(AESNI_ALIGN)));
+
+ memcpy(iv, req->iv, 12);
+ *((__be32 *)(iv+12)) = counter;
+
+ return gcmaes_decrypt(req, req->assoclen, ctx->hash_subkey, iv,
+ aes_ctx);
+}
+
static struct aead_alg aesni_aead_algs[] = { {
.setkey = common_rfc4106_set_key,
.setauthsize = common_rfc4106_set_authsize,
@@ -1069,6 +1160,23 @@ static struct aead_alg aesni_aead_algs[] = { {
.cra_ctxsize = sizeof(struct cryptd_aead *),
.cra_module = THIS_MODULE,
},
+}, {
+ .setkey = generic_gcmaes_set_key,
+ .setauthsize = generic_gcmaes_set_authsize,
+ .encrypt = generic_gcmaes_encrypt,
+ .decrypt = generic_gcmaes_decrypt,
+ .ivsize = 12,
+ .maxauthsize = 16,
+ .base = {
+ .cra_name = "gcm(aes)",
+ .cra_driver_name = "generic-gcm-aesni",
+ .cra_priority = 400,
+ .cra_flags = CRYPTO_ALG_ASYNC,
+ .cra_blocksize = 1,
+ .cra_ctxsize = sizeof(struct generic_gcmaes_ctx),
+ .cra_alignmask = AESNI_ALIGN - 1,
+ .cra_module = THIS_MODULE,
+ },
} };
#else
static struct aead_alg aesni_aead_algs[0];
diff --git a/arch/x86/crypto/glue_helper.c b/arch/x86/crypto/glue_helper.c
index 24ac9fad832d..d61e57960fe0 100644
--- a/arch/x86/crypto/glue_helper.c
+++ b/arch/x86/crypto/glue_helper.c
@@ -176,9 +176,6 @@ __glue_cbc_decrypt_128bit(const struct common_glue_ctx *gctx,
src -= 1;
dst -= 1;
} while (nbytes >= func_bytes);
-
- if (nbytes < bsize)
- goto done;
}
}
diff --git a/arch/x86/crypto/sha512-mb/sha512_mb.c b/arch/x86/crypto/sha512-mb/sha512_mb.c
index 2dd3674b5a1e..458409b7568d 100644
--- a/arch/x86/crypto/sha512-mb/sha512_mb.c
+++ b/arch/x86/crypto/sha512-mb/sha512_mb.c
@@ -269,19 +269,19 @@ static struct sha512_hash_ctx
* LAST
*/
ctx->error = HASH_CTX_ERROR_INVALID_FLAGS;
- return ctx;
+ goto unlock;
}
if (ctx->status & HASH_CTX_STS_PROCESSING) {
/* Cannot submit to a currently processing job. */
ctx->error = HASH_CTX_ERROR_ALREADY_PROCESSING;
- return ctx;
+ goto unlock;
}
if ((ctx->status & HASH_CTX_STS_COMPLETE) && !(flags & HASH_FIRST)) {
/* Cannot update a finished job. */
ctx->error = HASH_CTX_ERROR_ALREADY_COMPLETED;
- return ctx;
+ goto unlock;
}
@@ -363,6 +363,7 @@ static struct sha512_hash_ctx
}
ctx = sha512_ctx_mgr_resubmit(mgr, ctx);
+unlock:
spin_unlock_irqrestore(&cstate->work_lock, irqflags);
return ctx;
}