linux-kernel - [PATCH v2 120/144] KVM: selftests: Convert tprot away from VCPU

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Date:   Fri,  3 Jun 2022 00:43:07 +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 120/144] KVM: selftests: Convert tprot away from VCPU_ID

Convert tprot to use vm_create_with_vcpus() and pass around a
'struct kvm_vcpu' object instead of passing around vCPU IDs.  Note, this is
a "functional" change in the sense that the test now creates a vCPU with
vcpu_id==0 instead of vcpu_id==1.  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>
---
 tools/testing/selftests/kvm/s390x/tprot.c | 25 +++++++++++------------
 1 file changed, 12 insertions(+), 13 deletions(-)

diff --git a/tools/testing/selftests/kvm/s390x/tprot.c b/tools/testing/selftests/kvm/s390x/tprot.c
index c097b9db495e..4caa77388033 100644
--- a/tools/testing/selftests/kvm/s390x/tprot.c
+++ b/tools/testing/selftests/kvm/s390x/tprot.c
@@ -14,8 +14,6 @@
 #define CR0_FETCH_PROTECTION_OVERRIDE	(1UL << (63 - 38))
 #define CR0_STORAGE_PROTECTION_OVERRIDE	(1UL << (63 - 39))
 
-#define VCPU_ID 1
-
 static __aligned(PAGE_SIZE) uint8_t pages[2][PAGE_SIZE];
 static uint8_t *const page_store_prot = pages[0];
 static uint8_t *const page_fetch_prot = pages[1];
@@ -182,14 +180,14 @@ static void guest_code(void)
 	GUEST_SYNC(perform_next_stage(&i, mapped_0));
 }
 
-#define HOST_SYNC(vmp, stage)							\
+#define HOST_SYNC(vcpup, stage)							\
 ({										\
-	struct kvm_vm *__vm = (vmp);						\
+	struct kvm_vcpu *__vcpu = (vcpup);					\
 	struct ucall uc;							\
 	int __stage = (stage);							\
 										\
-	vcpu_run(__vm, VCPU_ID);						\
-	get_ucall(__vm, VCPU_ID, &uc);						\
+	vcpu_run(__vcpu->vm, __vcpu->id);					\
+	get_ucall(__vcpu->vm, __vcpu->id, &uc);					\
 	if (uc.cmd == UCALL_ABORT) {						\
 		TEST_FAIL("line %lu: %s, hints: %lu, %lu", uc.args[1],		\
 			  (const char *)uc.args[0], uc.args[2], uc.args[3]);	\
@@ -200,28 +198,29 @@ static void guest_code(void)
 
 int main(int argc, char *argv[])
 {
+	struct kvm_vcpu *vcpu;
 	struct kvm_vm *vm;
 	struct kvm_run *run;
 	vm_vaddr_t guest_0_page;
 
-	vm = vm_create_default(VCPU_ID, 0, guest_code);
-	run = vcpu_state(vm, VCPU_ID);
+	vm = vm_create_with_one_vcpu(&vcpu, guest_code);
+	run = vcpu->run;
 
-	HOST_SYNC(vm, STAGE_INIT_SIMPLE);
+	HOST_SYNC(vcpu, STAGE_INIT_SIMPLE);
 	mprotect(addr_gva2hva(vm, (vm_vaddr_t)pages), PAGE_SIZE * 2, PROT_READ);
-	HOST_SYNC(vm, TEST_SIMPLE);
+	HOST_SYNC(vcpu, TEST_SIMPLE);
 
 	guest_0_page = vm_vaddr_alloc(vm, PAGE_SIZE, 0);
 	if (guest_0_page != 0)
 		print_skip("Did not allocate page at 0 for fetch protection override tests");
-	HOST_SYNC(vm, STAGE_INIT_FETCH_PROT_OVERRIDE);
+	HOST_SYNC(vcpu, STAGE_INIT_FETCH_PROT_OVERRIDE);
 	if (guest_0_page == 0)
 		mprotect(addr_gva2hva(vm, (vm_vaddr_t)0), PAGE_SIZE, PROT_READ);
 	run->s.regs.crs[0] |= CR0_FETCH_PROTECTION_OVERRIDE;
 	run->kvm_dirty_regs = KVM_SYNC_CRS;
-	HOST_SYNC(vm, TEST_FETCH_PROT_OVERRIDE);
+	HOST_SYNC(vcpu, TEST_FETCH_PROT_OVERRIDE);
 
 	run->s.regs.crs[0] |= CR0_STORAGE_PROTECTION_OVERRIDE;
 	run->kvm_dirty_regs = KVM_SYNC_CRS;
-	HOST_SYNC(vm, TEST_STORAGE_PROT_OVERRIDE);
+	HOST_SYNC(vcpu, TEST_STORAGE_PROT_OVERRIDE);
 }
-- 
2.36.1.255.ge46751e96f-goog