On 4/1/24 08:20, Manali Shukla wrote:
By default, HLT instruction executed by guest is intercepted by hypervisor. However, KVM_CAP_X86_DISABLE_EXITS capability can be used to not intercept HLT by setting KVM_X86_DISABLE_EXITS_HLT.
Add a test case to test KVM_X86_DISABLE_EXITS_HLT functionality.
Suggested-by: Sean Christopherson seanjc@google.com Signed-off-by: Manali Shukla manali.shukla@amd.com
tools/testing/selftests/kvm/Makefile | 1 + .../kvm/x86_64/halt_disable_exit_test.c | 119 ++++++++++++++++++ 2 files changed, 120 insertions(+) create mode 100644 tools/testing/selftests/kvm/x86_64/halt_disable_exit_test.c
diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile index c75251d5c97c..9f72abb95d2e 100644 --- a/tools/testing/selftests/kvm/Makefile +++ b/tools/testing/selftests/kvm/Makefile @@ -89,6 +89,7 @@ TEST_GEN_PROGS_x86_64 += x86_64/set_sregs_test TEST_GEN_PROGS_x86_64 += x86_64/smaller_maxphyaddr_emulation_test TEST_GEN_PROGS_x86_64 += x86_64/smm_test TEST_GEN_PROGS_x86_64 += x86_64/state_test +TEST_GEN_PROGS_x86_64 += x86_64/halt_disable_exit_test TEST_GEN_PROGS_x86_64 += x86_64/vmx_preemption_timer_test TEST_GEN_PROGS_x86_64 += x86_64/svm_vmcall_test TEST_GEN_PROGS_x86_64 += x86_64/svm_int_ctl_test diff --git a/tools/testing/selftests/kvm/x86_64/halt_disable_exit_test.c b/tools/testing/selftests/kvm/x86_64/halt_disable_exit_test.c new file mode 100644 index 000000000000..4cc6a09906a2 --- /dev/null +++ b/tools/testing/selftests/kvm/x86_64/halt_disable_exit_test.c @@ -0,0 +1,119 @@ +// SPDX-License-Identifier: GPL-2.0-only +/*
- KVM disable halt exit test
- Copyright (C) 2024 Advanced Micro Devices, Inc.
- */
+#include <pthread.h> +#include <signal.h> +#include "kvm_util.h" +#include "processor.h" +#include "test_util.h"
+#define SIG_IPI SIGUSR1 +static pthread_t task_thread, vcpu_thread;
+static void guest_code(uint64_t *is_hlt_exec) +{
- while (!READ_ONCE(*is_hlt_exec))
;- safe_halt();
May I confirm if this selftest works on nested L1 VM as a hypervisor?
Thank you very much!
Dongli Zhang