linux-kernel - [PATCH v2 062/144] KVM: selftests: Convert svm_vmcall_test away from VCPU

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Message-Id: <20220603004331.1523888-63-seanjc@google.com>
Date:   Fri,  3 Jun 2022 00:42:09 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     kvm@...r.kernel.org, Vitaly Kuznetsov <vkuznets@...hat.com>,
        Andrew Jones <drjones@...hat.com>,
        David Matlack <dmatlack@...gle.com>,
        Ben Gardon <bgardon@...gle.com>,
        Oliver Upton <oupton@...gle.com>, linux-kernel@...r.kernel.org
Subject: [PATCH v2 062/144] KVM: selftests: Convert svm_vmcall_test away from VCPU_ID

Convert svm_vmcall_test to use vm_create_with_one_vcpu() and pass around
a 'struct kvm_vcpu' object instead of using a global VCPU_ID.  Note, this
is a "functional" change in the sense that the test now creates a vCPU
with vcpu_id==0 instead of vcpu_id==5.  The non-zero VCPU_ID was 100%
arbitrary and added little to no validation coverage.  If testing
non-zero vCPU IDs is desirable for generic tests, that can be done in the
future by tweaking the VM creation helpers.

Signed-off-by: Sean Christopherson <seanjc@...gle.com>
---
 .../selftests/kvm/x86_64/svm_vmcall_test.c       | 16 +++++++---------
 1 file changed, 7 insertions(+), 9 deletions(-)

diff --git a/tools/testing/selftests/kvm/x86_64/svm_vmcall_test.c b/tools/testing/selftests/kvm/x86_64/svm_vmcall_test.c
index be2ca157485b..15e389a7cd31 100644
--- a/tools/testing/selftests/kvm/x86_64/svm_vmcall_test.c
+++ b/tools/testing/selftests/kvm/x86_64/svm_vmcall_test.c
@@ -12,10 +12,6 @@
 #include "processor.h"
 #include "svm_util.h"
 
-#define VCPU_ID		5
-
-static struct kvm_vm *vm;
-
 static void l2_guest_code(struct svm_test_data *svm)
 {
 	__asm__ __volatile__("vmcall");
@@ -39,26 +35,28 @@ static void l1_guest_code(struct svm_test_data *svm)
 
 int main(int argc, char *argv[])
 {
+	struct kvm_vcpu *vcpu;
 	vm_vaddr_t svm_gva;
+	struct kvm_vm *vm;
 
 	nested_svm_check_supported();
 
-	vm = vm_create_default(VCPU_ID, 0, (void *) l1_guest_code);
+	vm = vm_create_with_one_vcpu(&vcpu, l1_guest_code);
 
 	vcpu_alloc_svm(vm, &svm_gva);
-	vcpu_args_set(vm, VCPU_ID, 1, svm_gva);
+	vcpu_args_set(vm, vcpu->id, 1, svm_gva);
 
 	for (;;) {
-		volatile struct kvm_run *run = vcpu_state(vm, VCPU_ID);
+		volatile struct kvm_run *run = vcpu->run;
 		struct ucall uc;
 
-		vcpu_run(vm, VCPU_ID);
+		vcpu_run(vm, vcpu->id);
 		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(vm, VCPU_ID, &uc)) {
+		switch (get_ucall(vm, vcpu->id, &uc)) {
 		case UCALL_ABORT:
 			TEST_FAIL("%s", (const char *)uc.args[0]);
 			/* NOT REACHED */
-- 
2.36.1.255.ge46751e96f-goog