[PATCH v4 06/16] KVM: selftests: Only muck with SREGS on x86 in mmu_stress_test

Sean Christopherson
2024-11-28T01:02:56Z

Try to get/set SREGS in mmu_stress_test only when running on x86, as the
ioctls are supported only by x86 and PPC, and the latter doesn't yet
support KVM selftests.

Reviewed-by: James Houghton <jthoughton@google.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
---
tools/testing/selftests/kvm/mmu_stress_test.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/tools/testing/selftests/kvm/mmu_stress_test.c b/tools/testing/selftests/kvm/mmu_stress_test.c
index 0b9678858b6d..847da23ec1b1 100644
--- a/tools/testing/selftests/kvm/mmu_stress_test.c
+++ b/tools/testing/selftests/kvm/mmu_stress_test.c
@@ -59,10 +59,10 @@ static void run_vcpu(struct kvm_vcpu *vcpu)

static void *vcpu_worker(void *data)
{
+ struct kvm_sregs __maybe_unused sregs;
struct vcpu_info *info = data;
struct kvm_vcpu *vcpu = info->vcpu;
struct kvm_vm *vm = vcpu->vm;
- struct kvm_sregs sregs;

vcpu_args_set(vcpu, 3, info->start_gpa, info->end_gpa, vm->page_size);

@@ -70,12 +70,12 @@ static void *vcpu_worker(void *data)

run_vcpu(vcpu);
rendezvous_with_boss();
+#ifdef __x86_64__
vcpu_sregs_get(vcpu, &sregs);
-#ifdef __x86_64__
/* Toggle CR0.WP to trigger a MMU context reset. */
sregs.cr0 ^= X86_CR0_WP;
-#endif
vcpu_sregs_set(vcpu, &sregs);
+#endif
rendezvous_with_boss();

run_vcpu(vcpu);