Signed-off-by: Ackerley Tng ackerleytng@google.com --- .../selftests/kvm/include/kvm_util_base.h | 24 ++++++++++++++ tools/testing/selftests/kvm/lib/kvm_util.c | 32 +++++++++++++++++++ .../selftests/kvm/lib/x86_64/processor.c | 15 +++++++-- 3 files changed, 69 insertions(+), 2 deletions(-)
diff --git a/tools/testing/selftests/kvm/include/kvm_util_base.h b/tools/testing/selftests/kvm/include/kvm_util_base.h index cdc204cfeb4c2..30453e2de8396 100644 --- a/tools/testing/selftests/kvm/include/kvm_util_base.h +++ b/tools/testing/selftests/kvm/include/kvm_util_base.h @@ -412,6 +412,8 @@ vm_vaddr_t vm_vaddr_alloc_page(struct kvm_vm *vm);
void virt_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr, unsigned int npages); +void virt_map_shared(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr, + unsigned int npages); void *addr_gpa2hva(struct kvm_vm *vm, vm_paddr_t gpa); void *addr_gva2hva(struct kvm_vm *vm, vm_vaddr_t gva); vm_paddr_t addr_hva2gpa(struct kvm_vm *vm, void *hva); @@ -843,6 +845,28 @@ static inline void virt_pg_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr virt_arch_pg_map(vm, vaddr, paddr); }
+/* + * VM Virtual Page Map as Shared + * + * Input Args: + * vm - Virtual Machine + * vaddr - VM Virtual Address + * paddr - VM Physical Address + * memslot - Memory region slot for new virtual translation tables + * + * Output Args: None + * + * Return: None + * + * Within @vm, creates a virtual translation for the page starting + * at @vaddr to the page starting at @paddr. + */ +void virt_arch_pg_map_shared(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr); + +static inline void virt_pg_map_shared(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr) +{ + virt_arch_pg_map_shared(vm, vaddr, paddr); +}
/* * Address Guest Virtual to Guest Physical diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c index 14246f0fd2e78..6673be2f49c31 100644 --- a/tools/testing/selftests/kvm/lib/kvm_util.c +++ b/tools/testing/selftests/kvm/lib/kvm_util.c @@ -1384,6 +1384,38 @@ void virt_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr, } }
+/* + * Map a range of VM virtual address to the VM's physical address as shared + * + * Input Args: + * vm - Virtual Machine + * vaddr - Virtuall address to map + * paddr - VM Physical Address + * npages - The number of pages to map + * + * Output Args: None + * + * Return: None + * + * Within the VM given by @vm, creates a virtual translation for + * @npages starting at @vaddr to the page range starting at @paddr. + */ +void virt_map_shared(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr, + unsigned int npages) +{ + size_t page_size = vm->page_size; + size_t size = npages * page_size; + + TEST_ASSERT(vaddr + size > vaddr, "Vaddr overflow"); + TEST_ASSERT(paddr + size > paddr, "Paddr overflow"); + + while (npages--) { + virt_pg_map_shared(vm, vaddr, paddr); + vaddr += page_size; + paddr += page_size; + } +} + /* * Address VM Physical to Host Virtual * diff --git a/tools/testing/selftests/kvm/lib/x86_64/processor.c b/tools/testing/selftests/kvm/lib/x86_64/processor.c index 1ea1019d48c13..b4c18f7335dab 100644 --- a/tools/testing/selftests/kvm/lib/x86_64/processor.c +++ b/tools/testing/selftests/kvm/lib/x86_64/processor.c @@ -176,7 +176,8 @@ static uint64_t *virt_create_upper_pte(struct kvm_vm *vm, return pte; }
-void __virt_pg_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr, int level) +static void ___virt_pg_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr, + int level, bool protected) { const uint64_t pg_size = PG_LEVEL_SIZE(level); uint64_t *pml4e, *pdpe, *pde; @@ -223,17 +224,27 @@ void __virt_pg_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr, int level) "PTE already present for 4k page at vaddr: 0x%lx\n", vaddr); *pte = PTE_PRESENT_MASK | PTE_WRITABLE_MASK | (paddr & PHYSICAL_PAGE_MASK);
- if (vm_is_gpa_protected(vm, paddr)) + if (protected) *pte |= vm->arch.c_bit; else *pte |= vm->arch.s_bit; }
+void __virt_pg_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr, int level) +{ + ___virt_pg_map(vm, vaddr, paddr, level, vm_is_gpa_protected(vm, paddr)); +} + void virt_arch_pg_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr) { __virt_pg_map(vm, vaddr, paddr, PG_LEVEL_4K); }
+void virt_arch_pg_map_shared(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr) +{ + ___virt_pg_map(vm, vaddr, paddr, PG_LEVEL_4K, false); +} + void virt_map_level(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr, uint64_t nr_bytes, int level) {