On Thu, Sep 15, 2022 at 12:04:45AM +0000, Vishal Annapurve wrote:
> svm_vmcall_test is superseded by fix_hypercall_test.
Please provide a more detailed description of why svm_vmcall_test is
being dropped. e.g. What do you mean by "superseded" specifically?
I ask because this will be helpful context for future readers of this
commit. I also ask because it's not clear to me that fix_hypercall_test
is a 1:1 replacement of svm_vmcall_test. e.g. svm_vmcall_test sets up an
L2 while fix_hypercall_test just executes in L1.
>
> Suggested-by: Sean Christopherson <seanjc@xxxxxxxxxx>
> Signed-off-by: Vishal Annapurve <vannapurve@xxxxxxxxxx>
> ---
> tools/testing/selftests/kvm/.gitignore | 1 -
> .../selftests/kvm/x86_64/svm_vmcall_test.c | 74 -------------------
> 2 files changed, 75 deletions(-)
> delete mode 100644 tools/testing/selftests/kvm/x86_64/svm_vmcall_test.c
>
> diff --git a/tools/testing/selftests/kvm/.gitignore b/tools/testing/selftests/kvm/.gitignore
> index d625a3f83780..22e9a5b5488c 100644
> --- a/tools/testing/selftests/kvm/.gitignore
> +++ b/tools/testing/selftests/kvm/.gitignore
> @@ -36,7 +36,6 @@
> /x86_64/sev_migrate_tests
> /x86_64/smm_test
> /x86_64/state_test
> -/x86_64/svm_vmcall_test
> /x86_64/svm_int_ctl_test
> /x86_64/svm_nested_soft_inject_test
> /x86_64/sync_regs_test
> diff --git a/tools/testing/selftests/kvm/x86_64/svm_vmcall_test.c b/tools/testing/selftests/kvm/x86_64/svm_vmcall_test.c
> deleted file mode 100644
> index c3ac45df7483..000000000000
> --- a/tools/testing/selftests/kvm/x86_64/svm_vmcall_test.c
> +++ /dev/null
> @@ -1,74 +0,0 @@
> -// SPDX-License-Identifier: GPL-2.0-only
> -/*
> - * svm_vmcall_test
> - *
> - * Copyright (C) 2020, Red Hat, Inc.
> - *
> - * Nested SVM testing: VMCALL
> - */
> -
> -#include "test_util.h"
> -#include "kvm_util.h"
> -#include "processor.h"
> -#include "svm_util.h"
> -
> -static void l2_guest_code(struct svm_test_data *svm)
> -{
> - __asm__ __volatile__("vmcall");
> -}
> -
> -static void l1_guest_code(struct svm_test_data *svm)
> -{
> - #define L2_GUEST_STACK_SIZE 64
> - unsigned long l2_guest_stack[L2_GUEST_STACK_SIZE];
> - struct vmcb *vmcb = svm->vmcb;
> -
> - /* Prepare for L2 execution. */
> - generic_svm_setup(svm, l2_guest_code,
> - &l2_guest_stack[L2_GUEST_STACK_SIZE]);
> -
> - run_guest(vmcb, svm->vmcb_gpa);
> -
> - GUEST_ASSERT(vmcb->control.exit_code == SVM_EXIT_VMMCALL);
> - GUEST_DONE();
> -}
> -
> -int main(int argc, char *argv[])
> -{
> - struct kvm_vcpu *vcpu;
> - vm_vaddr_t svm_gva;
> - struct kvm_vm *vm;
> -
> - TEST_REQUIRE(kvm_cpu_has(X86_FEATURE_SVM));
> -
> - vm = vm_create_with_one_vcpu(&vcpu, l1_guest_code);
> -
> - vcpu_alloc_svm(vm, &svm_gva);
> - vcpu_args_set(vcpu, 1, svm_gva);
> -
> - for (;;) {
> - volatile struct kvm_run *run = vcpu->run;
> - struct ucall uc;
> -
> - vcpu_run(vcpu);
> - TEST_ASSERT(run->exit_reason == KVM_EXIT_IO,
> - "Got exit_reason other than KVM_EXIT_IO: %u (%s)\n",
> - run->exit_reason,
> - exit_reason_str(run->exit_reason));
> -
> - switch (get_ucall(vcpu, &uc)) {
> - case UCALL_ABORT:
> - REPORT_GUEST_ASSERT(uc);
> - /* NOT REACHED */
> - case UCALL_SYNC:
> - break;
> - case UCALL_DONE:
> - goto done;
> - default:
> - TEST_FAIL("Unknown ucall 0x%lx.", uc.cmd);
> - }
> - }
> -done:
> - kvm_vm_free(vm);
> - return 0;
> -}
> --
> 2.37.2.789.g6183377224-goog
>
