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Remove manual instruction encodings for VMLOAD, VMRUN, and VMSAVE.

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This is	a relic	from when these	instructions weren't supported by the toolchain.
No functional change.

Submitted by:	adam_fenn.io
Reviewed by:	grehan
Approved by:	grehan (bhyve)
MFC after:	3 days
Differential Revision:	https://reviews.freebsd.org/D27130
This commit is contained in:
Peter Grehan 2020-11-26 05:58:55 +00:00
parent 01f3f35447
commit ddfc488c36
1 changed files with 3 additions and 7 deletions
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10
sys/amd64/vmm/amd/svm_support.S
View file

@ -39,10 +39,6 @@
#define VENTER push %rbp ; mov %rsp,%rbp
#define VLEAVE pop %rbp
#define VMLOAD .byte 0x0f, 0x01, 0xda
#define VMRUN .byte 0x0f, 0x01, 0xd8
#define VMSAVE .byte 0x0f, 0x01, 0xdb
/*
* svm_launch(uint64_t vmcb, struct svm_regctx *gctx, struct pcpu *pcpu)
* %rdi: physical address of VMCB
@ -91,9 +87,9 @@ ENTRY(svm_launch)
movq SCTX_RDI(%rsi), %rdi
movq SCTX_RSI(%rsi), %rsi /* %rsi must be restored last */
VMLOAD
VMRUN
VMSAVE
vmload %rax
vmrun %rax
vmsave %rax
pop %rax /* pop guest context pointer from the stack */