From: Paul Durrant pdurrant@amazon.com
If the relevant capability (KVM_XEN_HVM_CONFIG_SHARED_INFO_HVA) is present then re-map vcpu_info using the HVA part way through the tests to make sure then there is no functional change.
Signed-off-by: Paul Durrant pdurrant@amazon.com Reviewed-by: David Woodhouse dwmw@amazon.co.uk --- Cc: Sean Christopherson seanjc@google.com Cc: Paolo Bonzini pbonzini@redhat.com Cc: David Woodhouse dwmw2@infradead.org
v5: - New in this version. --- .../selftests/kvm/x86_64/xen_shinfo_test.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+)
diff --git a/tools/testing/selftests/kvm/x86_64/xen_shinfo_test.c b/tools/testing/selftests/kvm/x86_64/xen_shinfo_test.c index a61500ff0822..d2ea0435f4f7 100644 --- a/tools/testing/selftests/kvm/x86_64/xen_shinfo_test.c +++ b/tools/testing/selftests/kvm/x86_64/xen_shinfo_test.c @@ -62,6 +62,7 @@ enum { TEST_POLL_TIMEOUT, TEST_POLL_MASKED, TEST_POLL_WAKE, + SET_VCPU_INFO, TEST_TIMER_PAST, TEST_LOCKING_SEND_RACE, TEST_LOCKING_POLL_RACE, @@ -321,6 +322,10 @@ static void guest_code(void)
GUEST_SYNC(TEST_POLL_WAKE);
+ /* Set the vcpu_info to point at exactly the place it already is to + * make sure the attribute is functional. */ + GUEST_SYNC(SET_VCPU_INFO); + /* A timer wake an *unmasked* port which should wake us with an * actual interrupt, while we're polling on a different port. */ ports[0]++; @@ -888,6 +893,16 @@ int main(int argc, char *argv[]) alarm(1); break;
+ case SET_VCPU_INFO: + if (has_shinfo_hva) { + struct kvm_xen_vcpu_attr vih = { + .type = KVM_XEN_VCPU_ATTR_TYPE_VCPU_INFO_HVA, + .u.hva = (unsigned long)vinfo + }; + vcpu_ioctl(vcpu, KVM_XEN_VCPU_SET_ATTR, &vih); + } + break; + case TEST_TIMER_PAST: TEST_ASSERT(!evtchn_irq_expected, "Expected event channel IRQ but it didn't happen");