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Message-Id: <20220614200707.3315957-2-seanjc@google.com>
Date: Tue, 14 Jun 2022 20:06:26 +0000
From: Sean Christopherson <seanjc@...gle.com>
To: Paolo Bonzini <pbonzini@...hat.com>
Cc: kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
Sean Christopherson <seanjc@...gle.com>,
Jim Mattson <jmattson@...gle.com>
Subject: [PATCH v2 01/42] KVM: selftests: Set KVM's supported CPUID as vCPU's
CPUID during recreate
On x86-64, set KVM's supported CPUID as the vCPU's CPUID when recreating
a VM+vCPU to deduplicate code for state save/restore tests, and to
provide symmetry of sorts with respect to vm_create_with_one_vcpu(). The
extra KVM_SET_CPUID2 call is wasteful for Hyper-V, but ultimately is
nothing more than an expensive nop, and overriding the vCPU's CPUID with
the Hyper-V CPUID information is the only known scenario where a state
save/restore test wouldn't need/want the default CPUID.
Opportunistically use __weak for the default vm_compute_max_gfn(), it's
provided by tools' compiler.h.
Signed-off-by: Sean Christopherson <seanjc@...gle.com>
---
tools/testing/selftests/kvm/include/kvm_util_base.h | 9 +++++++++
tools/testing/selftests/kvm/lib/kvm_util.c | 10 ++++++++--
tools/testing/selftests/kvm/lib/x86_64/processor.c | 9 +++++++++
tools/testing/selftests/kvm/x86_64/amx_test.c | 1 -
tools/testing/selftests/kvm/x86_64/smm_test.c | 1 -
tools/testing/selftests/kvm/x86_64/state_test.c | 1 -
.../selftests/kvm/x86_64/vmx_preemption_timer_test.c | 2 --
7 files changed, 26 insertions(+), 7 deletions(-)
diff --git a/tools/testing/selftests/kvm/include/kvm_util_base.h b/tools/testing/selftests/kvm/include/kvm_util_base.h
index cdaea2383543..1b9e8719c624 100644
--- a/tools/testing/selftests/kvm/include/kvm_util_base.h
+++ b/tools/testing/selftests/kvm/include/kvm_util_base.h
@@ -681,6 +681,15 @@ static inline struct kvm_vcpu *vm_vcpu_add(struct kvm_vm *vm, uint32_t vcpu_id,
return vm_arch_vcpu_add(vm, vcpu_id, guest_code);
}
+/* Re-create a vCPU after restarting a VM, e.g. for state save/restore tests. */
+struct kvm_vcpu *vm_arch_vcpu_recreate(struct kvm_vm *vm, uint32_t vcpu_id);
+
+static inline struct kvm_vcpu *vm_vcpu_recreate(struct kvm_vm *vm,
+ uint32_t vcpu_id)
+{
+ return vm_arch_vcpu_recreate(vm, vcpu_id);
+}
+
void virt_arch_pgd_alloc(struct kvm_vm *vm);
static inline void virt_pgd_alloc(struct kvm_vm *vm)
diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
index 39f2f5f1338f..38c6083c9ce1 100644
--- a/tools/testing/selftests/kvm/lib/kvm_util.c
+++ b/tools/testing/selftests/kvm/lib/kvm_util.c
@@ -392,11 +392,17 @@ void kvm_vm_restart(struct kvm_vm *vmp)
}
}
+__weak struct kvm_vcpu *vm_arch_vcpu_recreate(struct kvm_vm *vm,
+ uint32_t vcpu_id)
+{
+ return __vm_vcpu_add(vm, vcpu_id);
+}
+
struct kvm_vcpu *vm_recreate_with_one_vcpu(struct kvm_vm *vm)
{
kvm_vm_restart(vm);
- return __vm_vcpu_add(vm, 0);
+ return vm_vcpu_recreate(vm, 0);
}
/*
@@ -1813,7 +1819,7 @@ void *addr_gva2hva(struct kvm_vm *vm, vm_vaddr_t gva)
return addr_gpa2hva(vm, addr_gva2gpa(vm, gva));
}
-unsigned long __attribute__((weak)) vm_compute_max_gfn(struct kvm_vm *vm)
+unsigned long __weak vm_compute_max_gfn(struct kvm_vm *vm)
{
return ((1ULL << vm->pa_bits) >> vm->page_shift) - 1;
}
diff --git a/tools/testing/selftests/kvm/lib/x86_64/processor.c b/tools/testing/selftests/kvm/lib/x86_64/processor.c
index 4a7de11d6f37..c46a22f8a9af 100644
--- a/tools/testing/selftests/kvm/lib/x86_64/processor.c
+++ b/tools/testing/selftests/kvm/lib/x86_64/processor.c
@@ -663,6 +663,15 @@ struct kvm_vcpu *vm_arch_vcpu_add(struct kvm_vm *vm, uint32_t vcpu_id,
return vcpu;
}
+struct kvm_vcpu *vm_arch_vcpu_recreate(struct kvm_vm *vm, uint32_t vcpu_id)
+{
+ struct kvm_vcpu *vcpu = __vm_vcpu_add(vm, vcpu_id);
+
+ vcpu_set_cpuid(vcpu, kvm_get_supported_cpuid());
+
+ return vcpu;
+}
+
/*
* Allocate an instance of struct kvm_cpuid2
*
diff --git a/tools/testing/selftests/kvm/x86_64/amx_test.c b/tools/testing/selftests/kvm/x86_64/amx_test.c
index dab4ca16a2df..95f59653dbce 100644
--- a/tools/testing/selftests/kvm/x86_64/amx_test.c
+++ b/tools/testing/selftests/kvm/x86_64/amx_test.c
@@ -425,7 +425,6 @@ int main(int argc, char *argv[])
/* Restore state in a new VM. */
vcpu = vm_recreate_with_one_vcpu(vm);
- vcpu_set_cpuid(vcpu, kvm_get_supported_cpuid());
vcpu_load_state(vcpu, state);
run = vcpu->run;
kvm_x86_state_cleanup(state);
diff --git a/tools/testing/selftests/kvm/x86_64/smm_test.c b/tools/testing/selftests/kvm/x86_64/smm_test.c
index 3cd1da388b52..e89139ce68dd 100644
--- a/tools/testing/selftests/kvm/x86_64/smm_test.c
+++ b/tools/testing/selftests/kvm/x86_64/smm_test.c
@@ -205,7 +205,6 @@ int main(int argc, char *argv[])
kvm_vm_release(vm);
vcpu = vm_recreate_with_one_vcpu(vm);
- vcpu_set_cpuid(vcpu, kvm_get_supported_cpuid());
vcpu_load_state(vcpu, state);
run = vcpu->run;
kvm_x86_state_cleanup(state);
diff --git a/tools/testing/selftests/kvm/x86_64/state_test.c b/tools/testing/selftests/kvm/x86_64/state_test.c
index 0bcd78cf7c79..ea878c963065 100644
--- a/tools/testing/selftests/kvm/x86_64/state_test.c
+++ b/tools/testing/selftests/kvm/x86_64/state_test.c
@@ -214,7 +214,6 @@ int main(int argc, char *argv[])
/* Restore state in a new VM. */
vcpu = vm_recreate_with_one_vcpu(vm);
- vcpu_set_cpuid(vcpu, kvm_get_supported_cpuid());
vcpu_load_state(vcpu, state);
run = vcpu->run;
kvm_x86_state_cleanup(state);
diff --git a/tools/testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c b/tools/testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c
index 99e57b0cc2c9..771b54b227d5 100644
--- a/tools/testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c
+++ b/tools/testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c
@@ -237,8 +237,6 @@ int main(int argc, char *argv[])
/* Restore state in a new VM. */
vcpu = vm_recreate_with_one_vcpu(vm);
-
- vcpu_set_cpuid(vcpu, kvm_get_supported_cpuid());
vcpu_load_state(vcpu, state);
run = vcpu->run;
kvm_x86_state_cleanup(state);
--
2.36.1.476.g0c4daa206d-goog
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