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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: Oliver Upton <oliver.upton@linux.dev>
Reviewed-by: Andrew Jones <andrew.jones@linux.dev>
Signed-off-by: Ricardo Koller <ricarkol@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20221017195834.2295901-3-ricarkol@google.com
This commit is contained in:
Ricardo Koller 2022-10-17 19:58:22 +00:00 committed by Marc Zyngier
parent a93871d0ea
commit 228f324dc7
2 changed files with 12 additions and 3 deletions
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2
tools/testing/selftests/kvm/include/aarch64/processor.h
View File

@ -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");

13
tools/testing/selftests/kvm/lib/aarch64/processor.c
View File

@ -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)