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-rw-r--r--tools/testing/selftests/kvm/x86_64/fix_hypercall_test.c22
1 files changed, 8 insertions, 14 deletions
diff --git a/tools/testing/selftests/kvm/x86_64/fix_hypercall_test.c b/tools/testing/selftests/kvm/x86_64/fix_hypercall_test.c
index e0004bd26536..6864eb0d5d14 100644
--- a/tools/testing/selftests/kvm/x86_64/fix_hypercall_test.c
+++ b/tools/testing/selftests/kvm/x86_64/fix_hypercall_test.c
@@ -30,14 +30,11 @@ static uint64_t svm_do_sched_yield(uint8_t apic_id)
{
uint64_t ret;
- asm volatile("mov %1, %%rax\n\t"
- "mov %2, %%rbx\n\t"
- "svm_hypercall_insn:\n\t"
+ asm volatile("svm_hypercall_insn:\n\t"
"vmmcall\n\t"
- "mov %%rax, %0\n\t"
- : "=r"(ret)
- : "r"((uint64_t)KVM_HC_SCHED_YIELD), "r"((uint64_t)apic_id)
- : "rax", "rbx", "memory");
+ : "=a"(ret)
+ : "a"((uint64_t)KVM_HC_SCHED_YIELD), "b"((uint64_t)apic_id)
+ : "memory");
return ret;
}
@@ -47,14 +44,11 @@ static uint64_t vmx_do_sched_yield(uint8_t apic_id)
{
uint64_t ret;
- asm volatile("mov %1, %%rax\n\t"
- "mov %2, %%rbx\n\t"
- "vmx_hypercall_insn:\n\t"
+ asm volatile("vmx_hypercall_insn:\n\t"
"vmcall\n\t"
- "mov %%rax, %0\n\t"
- : "=r"(ret)
- : "r"((uint64_t)KVM_HC_SCHED_YIELD), "r"((uint64_t)apic_id)
- : "rax", "rbx", "memory");
+ : "=a"(ret)
+ : "a"((uint64_t)KVM_HC_SCHED_YIELD), "b"((uint64_t)apic_id)
+ : "memory");
return ret;
}