linux-kernel - [V2 PATCH 3/8] KVM: selftests: Add arch specific post vm load setup

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Date:   Thu, 15 Sep 2022 00:04:43 +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: [V2 PATCH 3/8] KVM: selftests: Add arch specific post vm load setup

Add arch specific API kvm_selftest_post_vm_elf_load to possibly communicate
information to VM that is already known to selftest VMM logic.

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/aarch64/processor.c | 4 ++++
 tools/testing/selftests/kvm/lib/elf.c               | 2 ++
 tools/testing/selftests/kvm/lib/riscv/processor.c   | 4 ++++
 tools/testing/selftests/kvm/lib/s390x/processor.c   | 4 ++++
 tools/testing/selftests/kvm/lib/x86_64/processor.c  | 4 ++++
 6 files changed, 22 insertions(+)

diff --git a/tools/testing/selftests/kvm/include/kvm_util_base.h b/tools/testing/selftests/kvm/include/kvm_util_base.h
index 98edbbda9f97..73cfee3ebd76 100644
--- a/tools/testing/selftests/kvm/include/kvm_util_base.h
+++ b/tools/testing/selftests/kvm/include/kvm_util_base.h
@@ -839,4 +839,8 @@ 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 loading the vm elf.
+ */
+void kvm_arch_post_vm_elf_load(struct kvm_vm *vm);
 #endif /* SELFTEST_KVM_UTIL_BASE_H */
diff --git a/tools/testing/selftests/kvm/lib/aarch64/processor.c b/tools/testing/selftests/kvm/lib/aarch64/processor.c
index 2281d6c5d02f..12627c560f66 100644
--- a/tools/testing/selftests/kvm/lib/aarch64/processor.c
+++ b/tools/testing/selftests/kvm/lib/aarch64/processor.c
@@ -528,3 +528,7 @@ void kvm_selftest_arch_init(void)
 {
 	guest_modes_append_default();
 }
+
+void kvm_arch_post_vm_elf_load(struct kvm_vm *vm)
+{
+}
diff --git a/tools/testing/selftests/kvm/lib/elf.c b/tools/testing/selftests/kvm/lib/elf.c
index 9f54c098d9d0..b8963a7146ce 100644
--- a/tools/testing/selftests/kvm/lib/elf.c
+++ b/tools/testing/selftests/kvm/lib/elf.c
@@ -189,4 +189,6 @@ void kvm_vm_elf_load(struct kvm_vm *vm, const char *filename)
 				phdr.p_filesz);
 		}
 	}
+
+	kvm_arch_post_vm_elf_load(vm);
 }
diff --git a/tools/testing/selftests/kvm/lib/riscv/processor.c b/tools/testing/selftests/kvm/lib/riscv/processor.c
index 26660dd2ba78..4491c0d4be45 100644
--- a/tools/testing/selftests/kvm/lib/riscv/processor.c
+++ b/tools/testing/selftests/kvm/lib/riscv/processor.c
@@ -366,3 +366,7 @@ void assert_on_unhandled_exception(struct kvm_vcpu *vcpu)
 void kvm_selftest_arch_init(void)
 {
 }
+
+void kvm_arch_post_vm_elf_load(struct kvm_vm *vm)
+{
+}
diff --git a/tools/testing/selftests/kvm/lib/s390x/processor.c b/tools/testing/selftests/kvm/lib/s390x/processor.c
index 8654ec74009a..332501b3693f 100644
--- a/tools/testing/selftests/kvm/lib/s390x/processor.c
+++ b/tools/testing/selftests/kvm/lib/s390x/processor.c
@@ -222,3 +222,7 @@ void assert_on_unhandled_exception(struct kvm_vcpu *vcpu)
 void kvm_selftest_arch_init(void)
 {
 }
+
+void kvm_arch_post_vm_elf_load(struct kvm_vm *vm)
+{
+}
diff --git a/tools/testing/selftests/kvm/lib/x86_64/processor.c b/tools/testing/selftests/kvm/lib/x86_64/processor.c
index 20bf125f9363..25ae972f5c71 100644
--- a/tools/testing/selftests/kvm/lib/x86_64/processor.c
+++ b/tools/testing/selftests/kvm/lib/x86_64/processor.c
@@ -1315,3 +1315,7 @@ bool vm_is_unrestricted_guest(struct kvm_vm *vm)
 void kvm_selftest_arch_init(void)
 {
 }
+
+void kvm_arch_post_vm_elf_load(struct kvm_vm *vm)
+{
+}
-- 
2.37.2.789.g6183377224-goog