linux-kernel - [PATCH v2 09/20] x86/entry/64: Remove the RESTORE_...

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Message-Id: <c32672f6e47c561893316d48e06c7656b1039a36.1509609304.git.luto@kernel.org>
Date:   Thu,  2 Nov 2017 00:59:06 -0700
From:   Andy Lutomirski <luto@...nel.org>
To:     X86 ML <x86@...nel.org>
Cc:     Borislav Petkov <bpetkov@...e.de>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Brian Gerst <brgerst@...il.com>,
        Dave Hansen <dave.hansen@...el.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Andy Lutomirski <luto@...nel.org>
Subject: [PATCH v2 09/20] x86/entry/64: Remove the RESTORE_..._REGS infrastructure

All users of RESTORE_EXTRA_REGS, RESTORE_C_REGS and such, and
REMOVE_PT_GPREGS_FROM_STACK are gone.  Delete the macros.

Signed-off-by: Andy Lutomirski <luto@...nel.org>
---
 arch/x86/entry/calling.h | 52 ------------------------------------------------
 1 file changed, 52 deletions(-)

diff --git a/arch/x86/entry/calling.h b/arch/x86/entry/calling.h
index 0b9dd8123701..1895a685d3dd 100644
--- a/arch/x86/entry/calling.h
+++ b/arch/x86/entry/calling.h
@@ -141,16 +141,6 @@ For 32-bit we have the following conventions - kernel is built with
 	UNWIND_HINT_REGS offset=\offset
 	.endm
 
-	.macro RESTORE_EXTRA_REGS offset=0
-	movq 0*8+\offset(%rsp), %r15
-	movq 1*8+\offset(%rsp), %r14
-	movq 2*8+\offset(%rsp), %r13
-	movq 3*8+\offset(%rsp), %r12
-	movq 4*8+\offset(%rsp), %rbp
-	movq 5*8+\offset(%rsp), %rbx
-	UNWIND_HINT_REGS offset=\offset extra=0
-	.endm
-
 	.macro POP_EXTRA_REGS
 	popq %r15
 	popq %r14
@@ -172,48 +162,6 @@ For 32-bit we have the following conventions - kernel is built with
 	popq %rdi
 	.endm
 
-	.macro RESTORE_C_REGS_HELPER rstor_rax=1, rstor_rcx=1, rstor_r11=1, rstor_r8910=1, rstor_rdx=1
-	.if \rstor_r11
-	movq 6*8(%rsp), %r11
-	.endif
-	.if \rstor_r8910
-	movq 7*8(%rsp), %r10
-	movq 8*8(%rsp), %r9
-	movq 9*8(%rsp), %r8
-	.endif
-	.if \rstor_rax
-	movq 10*8(%rsp), %rax
-	.endif
-	.if \rstor_rcx
-	movq 11*8(%rsp), %rcx
-	.endif
-	.if \rstor_rdx
-	movq 12*8(%rsp), %rdx
-	.endif
-	movq 13*8(%rsp), %rsi
-	movq 14*8(%rsp), %rdi
-	UNWIND_HINT_IRET_REGS offset=16*8
-	.endm
-	.macro RESTORE_C_REGS
-	RESTORE_C_REGS_HELPER 1,1,1,1,1
-	.endm
-	.macro RESTORE_C_REGS_EXCEPT_RAX
-	RESTORE_C_REGS_HELPER 0,1,1,1,1
-	.endm
-	.macro RESTORE_C_REGS_EXCEPT_RCX
-	RESTORE_C_REGS_HELPER 1,0,1,1,1
-	.endm
-	.macro RESTORE_C_REGS_EXCEPT_R11
-	RESTORE_C_REGS_HELPER 1,1,0,1,1
-	.endm
-	.macro RESTORE_C_REGS_EXCEPT_RCX_R11
-	RESTORE_C_REGS_HELPER 1,0,0,1,1
-	.endm
-
-	.macro REMOVE_PT_GPREGS_FROM_STACK addskip=0
-	subq $-(15*8+\addskip), %rsp
-	.endm
-
 	.macro icebp
 	.byte 0xf1
 	.endm
-- 
2.13.6