linux-kernel - [PATCH v9 30/40] KVM: selftests: Export _vm_get_page_table

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Message-Id: <20220803134643.399471-1-vkuznets@redhat.com>
Date:   Wed,  3 Aug 2022 15:46:43 +0200
From:   Vitaly Kuznetsov <vkuznets@...hat.com>
To:     kvm@...r.kernel.org, Paolo Bonzini <pbonzini@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>
Cc:     Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Michael Kelley <mikelley@...rosoft.com>,
        Siddharth Chandrasekaran <sidcha@...zon.de>,
        Yuan Yao <yuan.yao@...ux.intel.com>,
        Maxim Levitsky <mlevitsk@...hat.com>,
        linux-hyperv@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v9 30/40] KVM: selftests: Export _vm_get_page_table_entry()

Make it possible for tests to mangle guest's page table entries in
addition to just getting them (available with vm_get_page_table_entry()).

Signed-off-by: Vitaly Kuznetsov <vkuznets@...hat.com>
---
 tools/testing/selftests/kvm/include/x86_64/processor.h | 2 ++
 tools/testing/selftests/kvm/lib/x86_64/processor.c     | 5 ++---
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/tools/testing/selftests/kvm/include/x86_64/processor.h b/tools/testing/selftests/kvm/include/x86_64/processor.h
index 73add423aa11..7b7ebaea3b4d 100644
--- a/tools/testing/selftests/kvm/include/x86_64/processor.h
+++ b/tools/testing/selftests/kvm/include/x86_64/processor.h
@@ -827,6 +827,8 @@ static inline uint8_t wrmsr_safe(uint32_t msr, uint64_t val)
 	return kvm_asm_safe("wrmsr", "a"(val & -1u), "d"(val >> 32), "c"(msr));
 }
 
+uint64_t *_vm_get_page_table_entry(struct kvm_vm *vm, struct kvm_vcpu *vcpu,
+				   uint64_t vaddr);
 uint64_t vm_get_page_table_entry(struct kvm_vm *vm, struct kvm_vcpu *vcpu,
 				 uint64_t vaddr);
 void vm_set_page_table_entry(struct kvm_vm *vm, struct kvm_vcpu *vcpu,
diff --git a/tools/testing/selftests/kvm/lib/x86_64/processor.c b/tools/testing/selftests/kvm/lib/x86_64/processor.c
index f35626df1dea..6ca1f14fac7a 100644
--- a/tools/testing/selftests/kvm/lib/x86_64/processor.c
+++ b/tools/testing/selftests/kvm/lib/x86_64/processor.c
@@ -214,9 +214,8 @@ void virt_arch_pg_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr)
 	__virt_pg_map(vm, vaddr, paddr, PG_LEVEL_4K);
 }
 
-static uint64_t *_vm_get_page_table_entry(struct kvm_vm *vm,
-					  struct kvm_vcpu *vcpu,
-					  uint64_t vaddr)
+uint64_t *_vm_get_page_table_entry(struct kvm_vm *vm, struct kvm_vcpu *vcpu,
+				   uint64_t vaddr)
 {
 	uint16_t index[4];
 	uint64_t *pml4e, *pdpe, *pde;
-- 
2.35.3