diff options
| author | Sean Christopherson <seanjc@google.com> | 2022-07-12 00:57:52 +0200 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2022-07-13 00:31:14 +0200 |
| commit | b624ae35418ce9424f639f8ffa2568e7674c262b (patch) | |
| tree | 0d38fe9639f174c24617c27033099bfc06180623 /tools/testing/selftests | |
| parent | KVM: selftests: Test MONITOR and MWAIT, not just MONITOR for quirk (diff) | |
| download | linux-b624ae35418ce9424f639f8ffa2568e7674c262b.tar.xz linux-b624ae35418ce9424f639f8ffa2568e7674c262b.zip | |
KVM: selftests: Provide valid inputs for MONITOR/MWAIT regs
Provide valid inputs for RAX, RCX, and RDX when testing whether or not
KVM injects a #UD on MONITOR/MWAIT. SVM has a virtualization hole and
checks for _all_ faults before checking for intercepts, e.g. MONITOR with
an unsupported RCX will #GP before KVM gets a chance to intercept and
emulate.
Fixes: 2325d4dd7321 ("KVM: selftests: Add MONITOR/MWAIT quirk test")
Signed-off-by: Sean Christopherson <seanjc@google.com>
Link: https://lore.kernel.org/r/20220711225753.1073989-3-seanjc@google.com
Diffstat (limited to 'tools/testing/selftests')
| -rw-r--r-- | tools/testing/selftests/kvm/x86_64/monitor_mwait_test.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/tools/testing/selftests/kvm/x86_64/monitor_mwait_test.c b/tools/testing/selftests/kvm/x86_64/monitor_mwait_test.c index f5c09cb528ae..6a4ebcdfa374 100644 --- a/tools/testing/selftests/kvm/x86_64/monitor_mwait_test.c +++ b/tools/testing/selftests/kvm/x86_64/monitor_mwait_test.c @@ -28,13 +28,17 @@ static void guest_monitor_wait(int testcase) GUEST_SYNC(testcase); - vector = kvm_asm_safe("monitor"); + /* + * Arbitrarily MONITOR this function, SVM performs fault checks before + * intercept checks, so the inputs for MONITOR and MWAIT must be valid. + */ + vector = kvm_asm_safe("monitor", "a"(guest_monitor_wait), "c"(0), "d"(0)); if (fault_wanted) GUEST_ASSERT_2(vector == UD_VECTOR, testcase, vector); else GUEST_ASSERT_2(!vector, testcase, vector); - vector = kvm_asm_safe("mwait"); + vector = kvm_asm_safe("mwait", "a"(guest_monitor_wait), "c"(0), "d"(0)); if (fault_wanted) GUEST_ASSERT_2(vector == UD_VECTOR, testcase, vector); else |