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| author | Sean Christopherson <seanjc@google.com> | 2023-02-04 03:41:48 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2023-03-14 15:20:07 +0100 |
| commit | 4009e0bb7b83d967a14e108d271f003b378f9af9 (patch) | |
| tree | 792accf18a8ceb1ed21005e3c005609ceaf6153f /tools | |
| parent | KVM: SVM: WARN if GATag generation drops VM or vCPU ID information (diff) | |
| download | linux-4009e0bb7b83d967a14e108d271f003b378f9af9.tar.xz linux-4009e0bb7b83d967a14e108d271f003b378f9af9.zip | |
KVM: selftests: Move the guts of kvm_hypercall() to a separate macro
Extract the guts of kvm_hypercall() to a macro so that Xen hypercalls,
which have a different register ABI, can reuse the VMCALL vs. VMMCALL
logic.
No functional change intended.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20230204024151.1373296-2-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/testing/selftests/kvm/lib/x86_64/processor.c | 29 |
1 files changed, 17 insertions, 12 deletions
diff --git a/tools/testing/selftests/kvm/lib/x86_64/processor.c b/tools/testing/selftests/kvm/lib/x86_64/processor.c index ae1e573d94ce..ff901cb47ffc 100644 --- a/tools/testing/selftests/kvm/lib/x86_64/processor.c +++ b/tools/testing/selftests/kvm/lib/x86_64/processor.c @@ -1139,21 +1139,26 @@ const struct kvm_cpuid_entry2 *get_cpuid_entry(const struct kvm_cpuid2 *cpuid, return NULL; } +#define X86_HYPERCALL(inputs...) \ +({ \ + uint64_t r; \ + \ + asm volatile("test %[use_vmmcall], %[use_vmmcall]\n\t" \ + "jnz 1f\n\t" \ + "vmcall\n\t" \ + "jmp 2f\n\t" \ + "1: vmmcall\n\t" \ + "2:" \ + : "=a"(r) \ + : [use_vmmcall] "r" (host_cpu_is_amd), inputs); \ + \ + r; \ +}) + uint64_t kvm_hypercall(uint64_t nr, uint64_t a0, uint64_t a1, uint64_t a2, uint64_t a3) { - uint64_t r; - - asm volatile("test %[use_vmmcall], %[use_vmmcall]\n\t" - "jnz 1f\n\t" - "vmcall\n\t" - "jmp 2f\n\t" - "1: vmmcall\n\t" - "2:" - : "=a"(r) - : "a"(nr), "b"(a0), "c"(a1), "d"(a2), "S"(a3), - [use_vmmcall] "r" (host_cpu_is_amd)); - return r; + return X86_HYPERCALL("a"(nr), "b"(a0), "c"(a1), "d"(a2), "S"(a3)); } const struct kvm_cpuid2 *kvm_get_supported_hv_cpuid(void) |