diff options
Diffstat (limited to 'tools/testing/selftests/kvm/lib/aarch64')
| -rw-r--r-- | tools/testing/selftests/kvm/lib/aarch64/processor.c | 83 | ||||
| -rw-r--r-- | tools/testing/selftests/kvm/lib/aarch64/ucall.c | 102 |
2 files changed, 68 insertions, 117 deletions
diff --git a/tools/testing/selftests/kvm/lib/aarch64/processor.c b/tools/testing/selftests/kvm/lib/aarch64/processor.c index 6f5551368944..5972a23b2765 100644 --- a/tools/testing/selftests/kvm/lib/aarch64/processor.c +++ b/tools/testing/selftests/kvm/lib/aarch64/processor.c @@ -11,6 +11,7 @@ #include "guest_modes.h" #include "kvm_util.h" #include "processor.h" +#include <linux/bitfield.h> #define DEFAULT_ARM64_GUEST_STACK_VADDR_MIN 0xac0000 @@ -76,13 +77,15 @@ static uint64_t __maybe_unused ptrs_per_pte(struct kvm_vm *vm) void virt_arch_pgd_alloc(struct kvm_vm *vm) { - if (!vm->pgd_created) { - vm_paddr_t paddr = vm_phy_pages_alloc(vm, - page_align(vm, ptrs_per_pgd(vm) * 8) / vm->page_size, - KVM_GUEST_PAGE_TABLE_MIN_PADDR, 0); - vm->pgd = paddr; - vm->pgd_created = true; - } + size_t nr_pages = page_align(vm, ptrs_per_pgd(vm) * 8) / vm->page_size; + + if (vm->pgd_created) + return; + + vm->pgd = vm_phy_pages_alloc(vm, nr_pages, + KVM_GUEST_PAGE_TABLE_MIN_PADDR, + vm->memslots[MEM_REGION_PT]); + vm->pgd_created = true; } static void _virt_pg_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr, @@ -133,12 +136,12 @@ static void _virt_pg_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr, void virt_arch_pg_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr) { - uint64_t attr_idx = 4; /* NORMAL (See DEFAULT_MAIR_EL1) */ + uint64_t attr_idx = MT_NORMAL; _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 +172,18 @@ 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) @@ -318,13 +328,16 @@ void vcpu_arch_dump(FILE *stream, struct kvm_vcpu *vcpu, uint8_t indent) struct kvm_vcpu *aarch64_vcpu_add(struct kvm_vm *vm, uint32_t vcpu_id, struct kvm_vcpu_init *init, void *guest_code) { - size_t stack_size = vm->page_size == 4096 ? - DEFAULT_STACK_PGS * vm->page_size : - vm->page_size; - uint64_t stack_vaddr = vm_vaddr_alloc(vm, stack_size, - DEFAULT_ARM64_GUEST_STACK_VADDR_MIN); + size_t stack_size; + uint64_t stack_vaddr; struct kvm_vcpu *vcpu = __vm_vcpu_add(vm, vcpu_id); + stack_size = vm->page_size == 4096 ? DEFAULT_STACK_PGS * vm->page_size : + vm->page_size; + stack_vaddr = __vm_vaddr_alloc(vm, stack_size, + DEFAULT_ARM64_GUEST_STACK_VADDR_MIN, + MEM_REGION_DATA); + aarch64_vcpu_setup(vcpu, init); vcpu_set_reg(vcpu, ARM64_CORE_REG(sp_el1), stack_vaddr + stack_size); @@ -428,8 +441,8 @@ unexpected_exception: void vm_init_descriptor_tables(struct kvm_vm *vm) { - vm->handlers = vm_vaddr_alloc(vm, sizeof(struct handlers), - vm->page_size); + vm->handlers = __vm_vaddr_alloc(vm, sizeof(struct handlers), + vm->page_size, MEM_REGION_DATA); *(vm_vaddr_t *)addr_gva2hva(vm, (vm_vaddr_t)(&exception_handlers)) = vm->handlers; } @@ -486,24 +499,15 @@ void aarch64_get_supported_page_sizes(uint32_t ipa, err = ioctl(vcpu_fd, KVM_GET_ONE_REG, ®); TEST_ASSERT(err == 0, KVM_IOCTL_ERROR(KVM_GET_ONE_REG, vcpu_fd)); - *ps4k = ((val >> 28) & 0xf) != 0xf; - *ps64k = ((val >> 24) & 0xf) == 0; - *ps16k = ((val >> 20) & 0xf) != 0; + *ps4k = FIELD_GET(ARM64_FEATURE_MASK(ID_AA64MMFR0_TGRAN4), val) != 0xf; + *ps64k = FIELD_GET(ARM64_FEATURE_MASK(ID_AA64MMFR0_TGRAN64), val) == 0; + *ps16k = FIELD_GET(ARM64_FEATURE_MASK(ID_AA64MMFR0_TGRAN16), val) != 0; close(vcpu_fd); close(vm_fd); close(kvm_fd); } -/* - * arm64 doesn't have a true default mode, so start by computing the - * available IPA space and page sizes early. - */ -void __attribute__((constructor)) init_guest_modes(void) -{ - guest_modes_append_default(); -} - void smccc_hvc(uint32_t function_id, uint64_t arg0, uint64_t arg1, uint64_t arg2, uint64_t arg3, uint64_t arg4, uint64_t arg5, uint64_t arg6, struct arm_smccc_res *res) @@ -528,3 +532,22 @@ void smccc_hvc(uint32_t function_id, uint64_t arg0, uint64_t arg1, [arg4] "r"(arg4), [arg5] "r"(arg5), [arg6] "r"(arg6) : "x0", "x1", "x2", "x3", "x4", "x5", "x6", "x7"); } + +void kvm_selftest_arch_init(void) +{ + /* + * arm64 doesn't have a true default mode, so start by computing the + * available IPA space and page sizes early. + */ + guest_modes_append_default(); +} + +void vm_vaddr_populate_bitmap(struct kvm_vm *vm) +{ + /* + * arm64 selftests use only TTBR0_EL1, meaning that the valid VA space + * is [0, 2^(64 - TCR_EL1.T0SZ)). + */ + sparsebit_set_num(vm->vpages_valid, 0, + (1ULL << vm->va_bits) >> vm->page_shift); +} diff --git a/tools/testing/selftests/kvm/lib/aarch64/ucall.c b/tools/testing/selftests/kvm/lib/aarch64/ucall.c index ed237b744690..562c16dfbb00 100644 --- a/tools/testing/selftests/kvm/lib/aarch64/ucall.c +++ b/tools/testing/selftests/kvm/lib/aarch64/ucall.c @@ -6,108 +6,36 @@ */ #include "kvm_util.h" +/* + * ucall_exit_mmio_addr holds per-VM values (global data is duplicated by each + * VM), it must not be accessed from host code. + */ static vm_vaddr_t *ucall_exit_mmio_addr; -static bool ucall_mmio_init(struct kvm_vm *vm, vm_paddr_t gpa) -{ - if (kvm_userspace_memory_region_find(vm, gpa, gpa + 1)) - return false; - - virt_pg_map(vm, gpa, gpa); - - ucall_exit_mmio_addr = (vm_vaddr_t *)gpa; - sync_global_to_guest(vm, ucall_exit_mmio_addr); - - return true; -} - -void ucall_init(struct kvm_vm *vm, void *arg) +void ucall_arch_init(struct kvm_vm *vm, vm_paddr_t mmio_gpa) { - vm_paddr_t gpa, start, end, step, offset; - unsigned int bits; - bool ret; + virt_pg_map(vm, mmio_gpa, mmio_gpa); - if (arg) { - gpa = (vm_paddr_t)arg; - ret = ucall_mmio_init(vm, gpa); - TEST_ASSERT(ret, "Can't set ucall mmio address to %lx", gpa); - return; - } + vm->ucall_mmio_addr = mmio_gpa; - /* - * Find an address within the allowed physical and virtual address - * spaces, that does _not_ have a KVM memory region associated with - * it. Identity mapping an address like this allows the guest to - * access it, but as KVM doesn't know what to do with it, it - * will assume it's something userspace handles and exit with - * KVM_EXIT_MMIO. Well, at least that's how it works for AArch64. - * Here we start with a guess that the addresses around 5/8th - * of the allowed space are unmapped and then work both down and - * up from there in 1/16th allowed space sized steps. - * - * Note, we need to use VA-bits - 1 when calculating the allowed - * virtual address space for an identity mapping because the upper - * half of the virtual address space is the two's complement of the - * lower and won't match physical addresses. - */ - bits = vm->va_bits - 1; - bits = min(vm->pa_bits, bits); - end = 1ul << bits; - start = end * 5 / 8; - step = end / 16; - for (offset = 0; offset < end - start; offset += step) { - if (ucall_mmio_init(vm, start - offset)) - return; - if (ucall_mmio_init(vm, start + offset)) - return; - } - TEST_FAIL("Can't find a ucall mmio address"); + write_guest_global(vm, ucall_exit_mmio_addr, (vm_vaddr_t *)mmio_gpa); } -void ucall_uninit(struct kvm_vm *vm) +void ucall_arch_do_ucall(vm_vaddr_t uc) { - ucall_exit_mmio_addr = 0; - sync_global_to_guest(vm, ucall_exit_mmio_addr); + WRITE_ONCE(*ucall_exit_mmio_addr, uc); } -void ucall(uint64_t cmd, int nargs, ...) -{ - struct ucall uc = {}; - va_list va; - int i; - - WRITE_ONCE(uc.cmd, cmd); - nargs = min(nargs, UCALL_MAX_ARGS); - - va_start(va, nargs); - for (i = 0; i < nargs; ++i) - WRITE_ONCE(uc.args[i], va_arg(va, uint64_t)); - va_end(va); - - WRITE_ONCE(*ucall_exit_mmio_addr, (vm_vaddr_t)&uc); -} - -uint64_t get_ucall(struct kvm_vcpu *vcpu, struct ucall *uc) +void *ucall_arch_get_ucall(struct kvm_vcpu *vcpu) { struct kvm_run *run = vcpu->run; - struct ucall ucall = {}; - - if (uc) - memset(uc, 0, sizeof(*uc)); if (run->exit_reason == KVM_EXIT_MMIO && - run->mmio.phys_addr == (uint64_t)ucall_exit_mmio_addr) { - vm_vaddr_t gva; - - TEST_ASSERT(run->mmio.is_write && run->mmio.len == 8, + run->mmio.phys_addr == vcpu->vm->ucall_mmio_addr) { + TEST_ASSERT(run->mmio.is_write && run->mmio.len == sizeof(uint64_t), "Unexpected ucall exit mmio address access"); - memcpy(&gva, run->mmio.data, sizeof(gva)); - memcpy(&ucall, addr_gva2hva(vcpu->vm, gva), sizeof(ucall)); - - vcpu_run_complete_io(vcpu); - if (uc) - memcpy(uc, &ucall, sizeof(ucall)); + return (void *)(*((uint64_t *)run->mmio.data)); } - return ucall.cmd; + return NULL; } |