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KVM/x86: Use SVM assembly instruction mnemonics instead of .byte streams

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Recently the minimum required version of binutils was changed to 2.20,
which supports all SVM instruction mnemonics. The patch removes
all .byte #defines and uses real instruction mnemonics instead.

Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Uros Bizjak 2018-11-26 17:00:08 +01:00 committed by Paolo Bonzini
parent 71883a62fc
commit ac5ffda244
2 changed files with 6 additions and 13 deletions
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7
arch/x86/include/asm/svm.h
View File

@ -290,11 +290,4 @@ struct __attribute__ ((__packed__)) vmcb {
#define SVM_CR0_SELECTIVE_MASK (X86_CR0_TS | X86_CR0_MP)
#define SVM_VMLOAD ".byte 0x0f, 0x01, 0xda"
#define SVM_VMRUN ".byte 0x0f, 0x01, 0xd8"
#define SVM_VMSAVE ".byte 0x0f, 0x01, 0xdb"
#define SVM_CLGI ".byte 0x0f, 0x01, 0xdd"
#define SVM_STGI ".byte 0x0f, 0x01, 0xdc"
#define SVM_INVLPGA ".byte 0x0f, 0x01, 0xdf"
#endif

12
arch/x86/kvm/svm.c
View File

@ -706,17 +706,17 @@ static u32 svm_msrpm_offset(u32 msr)
static inline void clgi(void)
{
asm volatile (__ex(SVM_CLGI));
asm volatile (__ex("clgi"));
}
static inline void stgi(void)
{
asm volatile (__ex(SVM_STGI));
asm volatile (__ex("stgi"));
}
static inline void invlpga(unsigned long addr, u32 asid)
{
asm volatile (__ex(SVM_INVLPGA) : : "a"(addr), "c"(asid));
asm volatile (__ex("invlpga %1, %0") : : "c"(asid), "a"(addr));
}
static int get_npt_level(struct kvm_vcpu *vcpu)
@ -5652,9 +5652,9 @@ static void svm_vcpu_run(struct kvm_vcpu *vcpu)
/* Enter guest mode */
"push %%" _ASM_AX " \n\t"
"mov %c[vmcb](%[svm]), %%" _ASM_AX " \n\t"
__ex(SVM_VMLOAD) "\n\t"
__ex(SVM_VMRUN) "\n\t"
__ex(SVM_VMSAVE) "\n\t"
__ex("vmload %%" _ASM_AX) "\n\t"
__ex("vmrun %%" _ASM_AX) "\n\t"
__ex("vmsave %%" _ASM_AX) "\n\t"
"pop %%" _ASM_AX " \n\t"
/* Save guest registers, load host registers */