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Date: Mon, 13 Dec 2021 09:19:40 -0500
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc: Vitaly Kuznetsov <vkuznets@...hat.com>,
Paolo Bonzini <pbonzini@...hat.com>,
Sasha Levin <sashal@...nel.org>, shuah@...nel.org,
seanjc@...gle.com, ricarkol@...gle.com, maz@...nel.org,
kvm@...r.kernel.org, linux-kselftest@...r.kernel.org
Subject: [PATCH MANUALSEL 5.15 7/9] KVM: selftests: Avoid KVM_SET_CPUID2 after KVM_RUN in hyperv_features test
From: Vitaly Kuznetsov <vkuznets@...hat.com>
[ Upstream commit 6c1186430a808f97e2052bd5d9eff12c5d5defb0 ]
hyperv_features's sole purpose is to test access to various Hyper-V MSRs
and hypercalls with different CPUID data. As KVM_SET_CPUID2 after KVM_RUN
is deprecated and soon-to-be forbidden, avoid it by re-creating test VM
for each sub-test.
Signed-off-by: Vitaly Kuznetsov <vkuznets@...hat.com>
Message-Id: <20211122175818.608220-2-vkuznets@...hat.com>
Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
.../selftests/kvm/x86_64/hyperv_features.c | 140 +++++++++---------
1 file changed, 71 insertions(+), 69 deletions(-)
diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_features.c b/tools/testing/selftests/kvm/x86_64/hyperv_features.c
index 91d88aaa98992..672915ce73d8f 100644
--- a/tools/testing/selftests/kvm/x86_64/hyperv_features.c
+++ b/tools/testing/selftests/kvm/x86_64/hyperv_features.c
@@ -165,10 +165,10 @@ static void hv_set_cpuid(struct kvm_vm *vm, struct kvm_cpuid2 *cpuid,
vcpu_set_cpuid(vm, VCPU_ID, cpuid);
}
-static void guest_test_msrs_access(struct kvm_vm *vm, struct msr_data *msr,
- struct kvm_cpuid2 *best)
+static void guest_test_msrs_access(void)
{
struct kvm_run *run;
+ struct kvm_vm *vm;
struct ucall uc;
int stage = 0, r;
struct kvm_cpuid_entry2 feat = {
@@ -180,11 +180,34 @@ static void guest_test_msrs_access(struct kvm_vm *vm, struct msr_data *msr,
struct kvm_cpuid_entry2 dbg = {
.function = HYPERV_CPUID_SYNDBG_PLATFORM_CAPABILITIES
};
- struct kvm_enable_cap cap = {0};
-
- run = vcpu_state(vm, VCPU_ID);
+ struct kvm_cpuid2 *best;
+ vm_vaddr_t msr_gva;
+ struct kvm_enable_cap cap = {
+ .cap = KVM_CAP_HYPERV_ENFORCE_CPUID,
+ .args = {1}
+ };
+ struct msr_data *msr;
while (true) {
+ vm = vm_create_default(VCPU_ID, 0, guest_msr);
+
+ msr_gva = vm_vaddr_alloc_page(vm);
+ memset(addr_gva2hva(vm, msr_gva), 0x0, getpagesize());
+ msr = addr_gva2hva(vm, msr_gva);
+
+ vcpu_args_set(vm, VCPU_ID, 1, msr_gva);
+ vcpu_enable_cap(vm, VCPU_ID, &cap);
+
+ vcpu_set_hv_cpuid(vm, VCPU_ID);
+
+ best = kvm_get_supported_hv_cpuid();
+
+ vm_init_descriptor_tables(vm);
+ vcpu_init_descriptor_tables(vm, VCPU_ID);
+ vm_install_exception_handler(vm, GP_VECTOR, guest_gp_handler);
+
+ run = vcpu_state(vm, VCPU_ID);
+
switch (stage) {
case 0:
/*
@@ -315,6 +338,7 @@ static void guest_test_msrs_access(struct kvm_vm *vm, struct msr_data *msr,
* capability enabled and guest visible CPUID bit unset.
*/
cap.cap = KVM_CAP_HYPERV_SYNIC2;
+ cap.args[0] = 0;
vcpu_enable_cap(vm, VCPU_ID, &cap);
break;
case 22:
@@ -461,9 +485,9 @@ static void guest_test_msrs_access(struct kvm_vm *vm, struct msr_data *msr,
switch (get_ucall(vm, VCPU_ID, &uc)) {
case UCALL_SYNC:
- TEST_ASSERT(uc.args[1] == stage,
- "Unexpected stage: %ld (%d expected)\n",
- uc.args[1], stage);
+ TEST_ASSERT(uc.args[1] == 0,
+ "Unexpected stage: %ld (0 expected)\n",
+ uc.args[1]);
break;
case UCALL_ABORT:
TEST_FAIL("%s at %s:%ld", (const char *)uc.args[0],
@@ -474,13 +498,14 @@ static void guest_test_msrs_access(struct kvm_vm *vm, struct msr_data *msr,
}
stage++;
+ kvm_vm_free(vm);
}
}
-static void guest_test_hcalls_access(struct kvm_vm *vm, struct hcall_data *hcall,
- void *input, void *output, struct kvm_cpuid2 *best)
+static void guest_test_hcalls_access(void)
{
struct kvm_run *run;
+ struct kvm_vm *vm;
struct ucall uc;
int stage = 0, r;
struct kvm_cpuid_entry2 feat = {
@@ -493,10 +518,38 @@ static void guest_test_hcalls_access(struct kvm_vm *vm, struct hcall_data *hcall
struct kvm_cpuid_entry2 dbg = {
.function = HYPERV_CPUID_SYNDBG_PLATFORM_CAPABILITIES
};
-
- run = vcpu_state(vm, VCPU_ID);
+ struct kvm_enable_cap cap = {
+ .cap = KVM_CAP_HYPERV_ENFORCE_CPUID,
+ .args = {1}
+ };
+ vm_vaddr_t hcall_page, hcall_params;
+ struct hcall_data *hcall;
+ struct kvm_cpuid2 *best;
while (true) {
+ vm = vm_create_default(VCPU_ID, 0, guest_hcall);
+
+ vm_init_descriptor_tables(vm);
+ vcpu_init_descriptor_tables(vm, VCPU_ID);
+ vm_install_exception_handler(vm, UD_VECTOR, guest_ud_handler);
+
+ /* Hypercall input/output */
+ hcall_page = vm_vaddr_alloc_pages(vm, 2);
+ hcall = addr_gva2hva(vm, hcall_page);
+ memset(addr_gva2hva(vm, hcall_page), 0x0, 2 * getpagesize());
+
+ hcall_params = vm_vaddr_alloc_page(vm);
+ memset(addr_gva2hva(vm, hcall_params), 0x0, getpagesize());
+
+ vcpu_args_set(vm, VCPU_ID, 2, addr_gva2gpa(vm, hcall_page), hcall_params);
+ vcpu_enable_cap(vm, VCPU_ID, &cap);
+
+ vcpu_set_hv_cpuid(vm, VCPU_ID);
+
+ best = kvm_get_supported_hv_cpuid();
+
+ run = vcpu_state(vm, VCPU_ID);
+
switch (stage) {
case 0:
hcall->control = 0xdeadbeef;
@@ -606,9 +659,9 @@ static void guest_test_hcalls_access(struct kvm_vm *vm, struct hcall_data *hcall
switch (get_ucall(vm, VCPU_ID, &uc)) {
case UCALL_SYNC:
- TEST_ASSERT(uc.args[1] == stage,
- "Unexpected stage: %ld (%d expected)\n",
- uc.args[1], stage);
+ TEST_ASSERT(uc.args[1] == 0,
+ "Unexpected stage: %ld (0 expected)\n",
+ uc.args[1]);
break;
case UCALL_ABORT:
TEST_FAIL("%s at %s:%ld", (const char *)uc.args[0],
@@ -619,66 +672,15 @@ static void guest_test_hcalls_access(struct kvm_vm *vm, struct hcall_data *hcall
}
stage++;
+ kvm_vm_free(vm);
}
}
int main(void)
{
- struct kvm_cpuid2 *best;
- struct kvm_vm *vm;
- vm_vaddr_t msr_gva, hcall_page, hcall_params;
- struct kvm_enable_cap cap = {
- .cap = KVM_CAP_HYPERV_ENFORCE_CPUID,
- .args = {1}
- };
-
- /* Test MSRs */
- vm = vm_create_default(VCPU_ID, 0, guest_msr);
-
- msr_gva = vm_vaddr_alloc_page(vm);
- memset(addr_gva2hva(vm, msr_gva), 0x0, getpagesize());
- vcpu_args_set(vm, VCPU_ID, 1, msr_gva);
- vcpu_enable_cap(vm, VCPU_ID, &cap);
-
- vcpu_set_hv_cpuid(vm, VCPU_ID);
-
- best = kvm_get_supported_hv_cpuid();
-
- vm_init_descriptor_tables(vm);
- vcpu_init_descriptor_tables(vm, VCPU_ID);
- vm_install_exception_handler(vm, GP_VECTOR, guest_gp_handler);
-
pr_info("Testing access to Hyper-V specific MSRs\n");
- guest_test_msrs_access(vm, addr_gva2hva(vm, msr_gva),
- best);
- kvm_vm_free(vm);
-
- /* Test hypercalls */
- vm = vm_create_default(VCPU_ID, 0, guest_hcall);
-
- vm_init_descriptor_tables(vm);
- vcpu_init_descriptor_tables(vm, VCPU_ID);
- vm_install_exception_handler(vm, UD_VECTOR, guest_ud_handler);
-
- /* Hypercall input/output */
- hcall_page = vm_vaddr_alloc_pages(vm, 2);
- memset(addr_gva2hva(vm, hcall_page), 0x0, 2 * getpagesize());
-
- hcall_params = vm_vaddr_alloc_page(vm);
- memset(addr_gva2hva(vm, hcall_params), 0x0, getpagesize());
-
- vcpu_args_set(vm, VCPU_ID, 2, addr_gva2gpa(vm, hcall_page), hcall_params);
- vcpu_enable_cap(vm, VCPU_ID, &cap);
-
- vcpu_set_hv_cpuid(vm, VCPU_ID);
-
- best = kvm_get_supported_hv_cpuid();
+ guest_test_msrs_access();
pr_info("Testing access to Hyper-V hypercalls\n");
- guest_test_hcalls_access(vm, addr_gva2hva(vm, hcall_params),
- addr_gva2hva(vm, hcall_page),
- addr_gva2hva(vm, hcall_page) + getpagesize(),
- best);
-
- kvm_vm_free(vm);
+ guest_test_hcalls_access();
}
--
2.33.0
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