Commit 228f324d authored by Ricardo Koller's avatar Ricardo Koller Committed by Marc Zyngier
Browse files

KVM: selftests: aarch64: Add virt_get_pte_hva() library function 



Add a library function to get the PTE (a host virtual address) of a
given GVA.  This will be used in a future commit by a test to clear and
check the access flag of a particular page.

Reviewed-by: default avatarOliver Upton <oliver.upton@linux.dev>
Reviewed-by: default avatarAndrew Jones <andrew.jones@linux.dev>
Signed-off-by: default avatarRicardo Koller <ricarkol@google.com>
Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20221017195834.2295901-3-ricarkol@google.com
parent a93871d0

tools/testing/selftests/kvm/include/aarch64/processor.h

+2 −0
Original line number Diff line number Diff line
@@ -109,6 +109,8 @@ void vm_install_exception_handler(struct kvm_vm *vm, 
void vm_install_sync_handler(struct kvm_vm *vm,

		int vector, int ec, handler_fn handler);



uint64_t *virt_get_pte_hva(struct kvm_vm *vm, vm_vaddr_t gva);



static inline void cpu_relax(void)

{

	asm volatile("yield" ::: "memory");

tools/testing/selftests/kvm/lib/aarch64/processor.c

+10 −3
Original line number Diff line number Diff line
@@ -138,7 +138,7 @@ void virt_arch_pg_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr) 
	_virt_pg_map(vm, vaddr, paddr, attr_idx);

}



vm_paddr_t addr_arch_gva2gpa(struct kvm_vm *vm, vm_vaddr_t gva)

uint64_t *virt_get_pte_hva(struct kvm_vm *vm, vm_vaddr_t gva)

{

	uint64_t *ptep;
@@ -169,11 +169,18 @@ vm_paddr_t addr_arch_gva2gpa(struct kvm_vm *vm, vm_vaddr_t gva) 
		TEST_FAIL("Page table levels must be 2, 3, or 4");

	}



	return pte_addr(vm, *ptep) + (gva & (vm->page_size - 1));

	return ptep;



unmapped_gva:

	TEST_FAIL("No mapping for vm virtual address, gva: 0x%lx", gva);

	exit(1);

	exit(EXIT_FAILURE);

}



vm_paddr_t addr_arch_gva2gpa(struct kvm_vm *vm, vm_vaddr_t gva)

{

	uint64_t *ptep = virt_get_pte_hva(vm, gva);



	return pte_addr(vm, *ptep) + (gva & (vm->page_size - 1));

}



static void pte_dump(FILE *stream, struct kvm_vm *vm, uint8_t indent, uint64_t page, int level)