diff options
| author | Sean Christopherson <seanjc@google.com> | 2022-06-14 20:06:49 +0000 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2022-07-13 18:14:17 -0700 |
| commit | 1940af0b8179ae2c2bd287fbd3edaab59df5fb55 (patch) | |
| tree | 1211a08f96cd5575da297add75702b474cd1857b /tools/testing/selftests/kvm/lib/x86_64/processor.c | |
| parent | 7af7161d87383f84caec1e8aaf6366c31ce845ec (diff) | |
| download | linux-1940af0b8179ae2c2bd287fbd3edaab59df5fb55.tar.bz2 | |
KVM: selftests: Add and use helper to set vCPU's CPUID maxphyaddr
Add a helper to set a vCPU's guest.MAXPHYADDR, and use it in the test
that verifies the emulator returns an error on an unknown instruction
when KVM emulates in response to an EPT violation with a GPA that is
legal in hardware but illegal with respect to the guest's MAXPHYADDR.
Add a helper even though there's only a single user at this time. Before
its removal, mmu_role_test also stuffed guest.MAXPHYADDR, and the helper
provides a small amount of clarity.
More importantly, this eliminates a set_cpuid() user and an instance of
modifying kvm_get_supported_cpuid()'s static "cpuid".
Signed-off-by: Sean Christopherson <seanjc@google.com>
Link: https://lore.kernel.org/r/20220614200707.3315957-25-seanjc@google.com
Diffstat (limited to 'tools/testing/selftests/kvm/lib/x86_64/processor.c')
| -rw-r--r-- | tools/testing/selftests/kvm/lib/x86_64/processor.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/tools/testing/selftests/kvm/lib/x86_64/processor.c b/tools/testing/selftests/kvm/lib/x86_64/processor.c index 080480c397a4..27bf5dad6ec5 100644 --- a/tools/testing/selftests/kvm/lib/x86_64/processor.c +++ b/tools/testing/selftests/kvm/lib/x86_64/processor.c @@ -762,6 +762,14 @@ void vcpu_init_cpuid(struct kvm_vcpu *vcpu, struct kvm_cpuid2 *cpuid) vcpu_set_cpuid(vcpu); } +void vcpu_set_cpuid_maxphyaddr(struct kvm_vcpu *vcpu, uint8_t maxphyaddr) +{ + struct kvm_cpuid_entry2 *entry = vcpu_get_cpuid_entry(vcpu, 0x80000008); + + entry->eax = (entry->eax & ~0xff) | maxphyaddr; + vcpu_set_cpuid(vcpu); +} + void vcpu_set_or_clear_cpuid_feature(struct kvm_vcpu *vcpu, struct kvm_x86_cpu_feature feature, bool set) |