Module Name: src
Committed By: maxv
Date: Tue Aug 11 15:48:42 UTC 2020
Modified Files:
src/sys/dev/nvmm/x86: nvmm_x86_svmfunc.S nvmm_x86_vmxfunc.S
Log Message:
Micro-optimize: use pushq instead of pushw. To avoid LCP stalls and
unaligned stack accesses.
To generate a diff of this commit:
cvs rdiff -u -r1.4 -r1.5 src/sys/dev/nvmm/x86/nvmm_x86_svmfunc.S \
src/sys/dev/nvmm/x86/nvmm_x86_vmxfunc.S
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/dev/nvmm/x86/nvmm_x86_svmfunc.S
diff -u src/sys/dev/nvmm/x86/nvmm_x86_svmfunc.S:1.4 src/sys/dev/nvmm/x86/nvmm_x86_svmfunc.S:1.5
--- src/sys/dev/nvmm/x86/nvmm_x86_svmfunc.S:1.4 Sun Jul 19 06:36:37 2020
+++ src/sys/dev/nvmm/x86/nvmm_x86_svmfunc.S Tue Aug 11 15:48:42 2020
@@ -1,4 +1,4 @@
-/* $NetBSD: nvmm_x86_svmfunc.S,v 1.4 2020/07/19 06:36:37 maxv Exp $ */
+/* $NetBSD: nvmm_x86_svmfunc.S,v 1.5 2020/08/11 15:48:42 maxv Exp $ */
/*
* Copyright (c) 2018-2020 The NetBSD Foundation, Inc.
@@ -75,10 +75,10 @@
#define HOST_SAVE_TR \
strw %ax ;\
- pushw %ax
+ pushq %rax
#define HOST_RESTORE_TR \
- popw %ax ;\
+ popq %rax ;\
movzwq %ax,%rdx ;\
movq CPUVAR(GDT),%rax ;\
andq $~0x0200,4(%rax,%rdx, 1) ;\
@@ -86,10 +86,10 @@
#define HOST_SAVE_LDT \
sldtw %ax ;\
- pushw %ax
+ pushq %rax
#define HOST_RESTORE_LDT \
- popw %ax ;\
+ popq %rax ;\
lldtw %ax
/*
Index: src/sys/dev/nvmm/x86/nvmm_x86_vmxfunc.S
diff -u src/sys/dev/nvmm/x86/nvmm_x86_vmxfunc.S:1.4 src/sys/dev/nvmm/x86/nvmm_x86_vmxfunc.S:1.5
--- src/sys/dev/nvmm/x86/nvmm_x86_vmxfunc.S:1.4 Sun Jul 19 06:36:37 2020
+++ src/sys/dev/nvmm/x86/nvmm_x86_vmxfunc.S Tue Aug 11 15:48:42 2020
@@ -1,4 +1,4 @@
-/* $NetBSD: nvmm_x86_vmxfunc.S,v 1.4 2020/07/19 06:36:37 maxv Exp $ */
+/* $NetBSD: nvmm_x86_vmxfunc.S,v 1.5 2020/08/11 15:48:42 maxv Exp $ */
/*
* Copyright (c) 2018-2020 The NetBSD Foundation, Inc.
@@ -100,10 +100,10 @@ END(_vmx_vmxoff)
#define HOST_SAVE_LDT \
sldtw %ax ;\
- pushw %ax
+ pushq %rax
#define HOST_RESTORE_LDT \
- popw %ax ;\
+ popq %rax ;\
lldtw %ax
/*
