Patchwork [02/14] x86/crypto: aesni: Macro-ify func save/restore

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Submitter Dave Watson
Date Feb. 12, 2018, 7:48 p.m.
Message ID <20180212194815.GA60401@davejwatson-mba.local>
Download mbox | patch
Permalink /patch/10214295/
State Superseded
Delegated to: Herbert Xu
Headers show

Comments

Dave Watson - Feb. 12, 2018, 7:48 p.m.
Macro-ify function save and restore.  These will be used in new functions
added for scatter/gather update operations.

Signed-off-by: Dave Watson <davejwatson@fb.com>
---
 arch/x86/crypto/aesni-intel_asm.S | 53 ++++++++++++++++++---------------------
 1 file changed, 24 insertions(+), 29 deletions(-)

Patch

diff --git a/arch/x86/crypto/aesni-intel_asm.S b/arch/x86/crypto/aesni-intel_asm.S
index 48911fe..39b42b1 100644
--- a/arch/x86/crypto/aesni-intel_asm.S
+++ b/arch/x86/crypto/aesni-intel_asm.S
@@ -170,6 +170,26 @@  ALL_F:      .octa 0xffffffffffffffffffffffffffffffff
 #define TKEYP	T1
 #endif
 
+.macro FUNC_SAVE
+	push	%r12
+	push	%r13
+	push	%r14
+	mov	%rsp, %r14
+#
+# states of %xmm registers %xmm6:%xmm15 not saved
+# all %xmm registers are clobbered
+#
+	sub	$VARIABLE_OFFSET, %rsp
+	and	$~63, %rsp
+.endm
+
+
+.macro FUNC_RESTORE
+	mov	%r14, %rsp
+	pop	%r14
+	pop	%r13
+	pop	%r12
+.endm
 
 #ifdef __x86_64__
 /* GHASH_MUL MACRO to implement: Data*HashKey mod (128,127,126,121,0)
@@ -1130,16 +1150,7 @@  _esb_loop_\@:
 *
 *****************************************************************************/
 ENTRY(aesni_gcm_dec)
-	push	%r12
-	push	%r13
-	push	%r14
-	mov	%rsp, %r14
-/*
-* states of %xmm registers %xmm6:%xmm15 not saved
-* all %xmm registers are clobbered
-*/
-	sub	$VARIABLE_OFFSET, %rsp
-	and	$~63, %rsp                        # align rsp to 64 bytes
+	FUNC_SAVE
 	mov	%arg6, %r12
 	movdqu	(%r12), %xmm13			  # %xmm13 = HashKey
         movdqa  SHUF_MASK(%rip), %xmm2
@@ -1309,10 +1320,7 @@  _T_1_decrypt:
 _T_16_decrypt:
 	movdqu	%xmm0, (%r10)
 _return_T_done_decrypt:
-	mov	%r14, %rsp
-	pop	%r14
-	pop	%r13
-	pop	%r12
+	FUNC_RESTORE
 	ret
 ENDPROC(aesni_gcm_dec)
 
@@ -1393,22 +1401,12 @@  ENDPROC(aesni_gcm_dec)
 * poly = x^128 + x^127 + x^126 + x^121 + 1
 ***************************************************************************/
 ENTRY(aesni_gcm_enc)
-	push	%r12
-	push	%r13
-	push	%r14
-	mov	%rsp, %r14
-#
-# states of %xmm registers %xmm6:%xmm15 not saved
-# all %xmm registers are clobbered
-#
-	sub	$VARIABLE_OFFSET, %rsp
-	and	$~63, %rsp
+	FUNC_SAVE
 	mov	%arg6, %r12
 	movdqu	(%r12), %xmm13
         movdqa  SHUF_MASK(%rip), %xmm2
 	PSHUFB_XMM %xmm2, %xmm13
 
-
 # precompute HashKey<<1 mod poly from the HashKey (required for GHASH)
 
 	movdqa	%xmm13, %xmm2
@@ -1576,10 +1574,7 @@  _T_1_encrypt:
 _T_16_encrypt:
 	movdqu	%xmm0, (%r10)
 _return_T_done_encrypt:
-	mov	%r14, %rsp
-	pop	%r14
-	pop	%r13
-	pop	%r12
+	FUNC_RESTORE
 	ret
 ENDPROC(aesni_gcm_enc)