linux-kernel - [V3 PATCH 3/4] KVM: selftests: Add arch specific post vm creation hook

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Message-ID: <20221013121319.994170-4-vannapurve@google.com>
Date:   Thu, 13 Oct 2022 12:13:18 +0000
From:   Vishal Annapurve <vannapurve@...gle.com>
To:     x86@...nel.org, kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-kselftest@...r.kernel.org
Cc:     pbonzini@...hat.com, shuah@...nel.org, bgardon@...gle.com,
        seanjc@...gle.com, oupton@...gle.com, peterx@...hat.com,
        vkuznets@...hat.com, dmatlack@...gle.com,
        Vishal Annapurve <vannapurve@...gle.com>
Subject: [V3 PATCH 3/4] KVM: selftests: Add arch specific post vm creation hook

Add arch specific API kvm_arch_vm_post_create to perform any required setup
after VM creation.

This API will be used in followup commit to convey cpu vendor type to the
guest vm.

Suggested-by: Sean Christopherson <seanjc@...gle.com>
Signed-off-by: Vishal Annapurve <vannapurve@...gle.com>
---
 tools/testing/selftests/kvm/include/kvm_util_base.h | 4 ++++
 tools/testing/selftests/kvm/lib/kvm_util.c          | 9 ++++++---
 tools/testing/selftests/kvm/lib/x86_64/processor.c  | 6 ++++++
 3 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/tools/testing/selftests/kvm/include/kvm_util_base.h b/tools/testing/selftests/kvm/include/kvm_util_base.h
index eec0e4898efe..1e7d3eae8c91 100644
--- a/tools/testing/selftests/kvm/include/kvm_util_base.h
+++ b/tools/testing/selftests/kvm/include/kvm_util_base.h
@@ -843,4 +843,8 @@ static inline int __vm_disable_nx_huge_pages(struct kvm_vm *vm)
  */
 void kvm_selftest_arch_init(void);
 
+/*
+ * API to execute architecture specific setup after creating the VM.
+ */
+void kvm_arch_vm_post_create(struct kvm_vm *vm);
 #endif /* SELFTEST_KVM_UTIL_BASE_H */
diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
index deb4c731b9fa..3ed72980c996 100644
--- a/tools/testing/selftests/kvm/lib/kvm_util.c
+++ b/tools/testing/selftests/kvm/lib/kvm_util.c
@@ -340,9 +340,8 @@ struct kvm_vm *__vm_create(enum vm_guest_mode mode, uint32_t nr_runnable_vcpus,
 
 	kvm_vm_elf_load(vm, program_invocation_name);
 
-#ifdef __x86_64__
-	vm_create_irqchip(vm);
-#endif
+	kvm_arch_vm_post_create(vm);
+
 	return vm;
 }
 
@@ -2022,6 +2021,10 @@ void __vm_get_stat(struct kvm_vm *vm, const char *stat_name, uint64_t *data,
 	}
 }
 
+__weak void kvm_arch_vm_post_create(struct kvm_vm *vm)
+{
+}
+
 __weak void kvm_selftest_arch_init(void)
 {
 }
diff --git a/tools/testing/selftests/kvm/lib/x86_64/processor.c b/tools/testing/selftests/kvm/lib/x86_64/processor.c
index 39c4409ef56a..fa65e8142c16 100644
--- a/tools/testing/selftests/kvm/lib/x86_64/processor.c
+++ b/tools/testing/selftests/kvm/lib/x86_64/processor.c
@@ -1327,3 +1327,9 @@ bool vm_is_unrestricted_guest(struct kvm_vm *vm)
 
 	return get_kvm_intel_param_bool("unrestricted_guest");
 }
+
+
+void kvm_arch_vm_post_create(struct kvm_vm *vm)
+{
+	vm_create_irqchip(vm);
+}
-- 
2.38.0.rc1.362.ged0d419d3c-goog