linux-kernel - [PATCH RESEND 2/5] KVM: x86: selftests: Alter the instruction of hypercall on Hygon

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Message-ID: <20260209041305.64906-3-zhiquan_li@163.com>
Date: Mon,  9 Feb 2026 12:13:02 +0800
From: Zhiquan Li <zhiquan_li@....com>
To: seanjc@...gle.com,
	pbonzini@...hat.com,
	shuah@...nel.org
Cc: kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	zhiquan_li@....com
Subject: [PATCH RESEND 2/5] KVM: x86: selftests: Alter the instruction of hypercall on Hygon

Hygon architecture uses VMMCALL as guest hypercall instruction.  Now,
the test like "fix hypercall" uses VMCALL and then results in test
failure.

Utilize the Hygon-specific flag to identify if the test is running on
Hygon CPU and alter the instruction of hypercall if needed.

Signed-off-by: Zhiquan Li <zhiquan_li@....com>
---
 tools/testing/selftests/kvm/lib/x86/processor.c      | 3 ++-
 tools/testing/selftests/kvm/x86/fix_hypercall_test.c | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/kvm/lib/x86/processor.c b/tools/testing/selftests/kvm/lib/x86/processor.c
index bbd3336f22eb..64f9ecd2387d 100644
--- a/tools/testing/selftests/kvm/lib/x86/processor.c
+++ b/tools/testing/selftests/kvm/lib/x86/processor.c
@@ -1229,7 +1229,8 @@ const struct kvm_cpuid_entry2 *get_cpuid_entry(const struct kvm_cpuid2 *cpuid,
 		     "1: vmmcall\n\t"					\
 		     "2:"						\
 		     : "=a"(r)						\
-		     : [use_vmmcall] "r" (host_cpu_is_amd), inputs);	\
+		     : [use_vmmcall] "r"				\
+		     (host_cpu_is_amd || host_cpu_is_hygon), inputs);	\
 									\
 	r;								\
 })
diff --git a/tools/testing/selftests/kvm/x86/fix_hypercall_test.c b/tools/testing/selftests/kvm/x86/fix_hypercall_test.c
index 762628f7d4ba..0377ab5b1238 100644
--- a/tools/testing/selftests/kvm/x86/fix_hypercall_test.c
+++ b/tools/testing/selftests/kvm/x86/fix_hypercall_test.c
@@ -52,7 +52,7 @@ static void guest_main(void)
 	if (host_cpu_is_intel) {
 		native_hypercall_insn = vmx_vmcall;
 		other_hypercall_insn  = svm_vmmcall;
-	} else if (host_cpu_is_amd) {
+	} else if (host_cpu_is_amd || host_cpu_is_hygon) {
 		native_hypercall_insn = svm_vmmcall;
 		other_hypercall_insn  = vmx_vmcall;
 	} else {
-- 
2.43.0