linux-kernel - [PATCH 03/22] KVM: selftests: Only muck with SREGS on x86 in mmu_stress

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Message-ID: <20240809194335.1726916-4-seanjc@google.com>
Date: Fri,  9 Aug 2024 12:43:15 -0700
From: Sean Christopherson <seanjc@...gle.com>
To: Sean Christopherson <seanjc@...gle.com>, Paolo Bonzini <pbonzini@...hat.com>
Cc: kvm@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Oliver Upton <oliver.upton@...ux.dev>, Marc Zyngier <maz@...nel.org>, Peter Xu <peterx@...hat.com>, 
	James Houghton <jthoughton@...gle.com>
Subject: [PATCH 03/22] KVM: selftests: Only muck with SREGS on x86 in mmu_stress_test

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.

Signed-off-by: Sean Christopherson <seanjc@...gle.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);
-- 
2.46.0.76.ge559c4bf1a-goog