diff options
Diffstat (limited to 'tools/testing/selftests/kvm/arm64/mmio_abort.c')
| -rw-r--r-- | tools/testing/selftests/kvm/arm64/mmio_abort.c | 159 |
1 files changed, 0 insertions, 159 deletions
diff --git a/tools/testing/selftests/kvm/arm64/mmio_abort.c b/tools/testing/selftests/kvm/arm64/mmio_abort.c deleted file mode 100644 index 8b7a80a51b1c..000000000000 --- a/tools/testing/selftests/kvm/arm64/mmio_abort.c +++ /dev/null @@ -1,159 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * mmio_abort - Tests for userspace MMIO abort injection - * - * Copyright (c) 2024 Google LLC - */ -#include "processor.h" -#include "test_util.h" - -#define MMIO_ADDR 0x8000000ULL - -static u64 expected_abort_pc; - -static void expect_sea_handler(struct ex_regs *regs) -{ - u64 esr = read_sysreg(esr_el1); - - GUEST_ASSERT_EQ(regs->pc, expected_abort_pc); - GUEST_ASSERT_EQ(ESR_ELx_EC(esr), ESR_ELx_EC_DABT_CUR); - GUEST_ASSERT_EQ(esr & ESR_ELx_FSC_TYPE, ESR_ELx_FSC_EXTABT); - - GUEST_DONE(); -} - -static void unexpected_dabt_handler(struct ex_regs *regs) -{ - GUEST_FAIL("Unexpected data abort at PC: %lx\n", regs->pc); -} - -static struct kvm_vm *vm_create_with_dabt_handler(struct kvm_vcpu **vcpu, void *guest_code, - handler_fn dabt_handler) -{ - struct kvm_vm *vm = vm_create_with_one_vcpu(vcpu, guest_code); - - vm_init_descriptor_tables(vm); - vcpu_init_descriptor_tables(*vcpu); - vm_install_sync_handler(vm, VECTOR_SYNC_CURRENT, ESR_ELx_EC_DABT_CUR, dabt_handler); - - virt_map(vm, MMIO_ADDR, MMIO_ADDR, 1); - - return vm; -} - -static void vcpu_inject_extabt(struct kvm_vcpu *vcpu) -{ - struct kvm_vcpu_events events = {}; - - events.exception.ext_dabt_pending = true; - vcpu_events_set(vcpu, &events); -} - -static void vcpu_run_expect_done(struct kvm_vcpu *vcpu) -{ - struct ucall uc; - - vcpu_run(vcpu); - switch (get_ucall(vcpu, &uc)) { - case UCALL_ABORT: - REPORT_GUEST_ASSERT(uc); - break; - case UCALL_DONE: - break; - default: - TEST_FAIL("Unexpected ucall: %lu", uc.cmd); - } -} - -extern char test_mmio_abort_insn; - -static void test_mmio_abort_guest(void) -{ - WRITE_ONCE(expected_abort_pc, (u64)&test_mmio_abort_insn); - - asm volatile("test_mmio_abort_insn:\n\t" - "ldr x0, [%0]\n\t" - : : "r" (MMIO_ADDR) : "x0", "memory"); - - GUEST_FAIL("MMIO instruction should not retire"); -} - -/* - * Test that KVM doesn't complete MMIO emulation when userspace has made an - * external abort pending for the instruction. - */ -static void test_mmio_abort(void) -{ - struct kvm_vcpu *vcpu; - struct kvm_vm *vm = vm_create_with_dabt_handler(&vcpu, test_mmio_abort_guest, - expect_sea_handler); - struct kvm_run *run = vcpu->run; - - vcpu_run(vcpu); - TEST_ASSERT_KVM_EXIT_REASON(vcpu, KVM_EXIT_MMIO); - TEST_ASSERT_EQ(run->mmio.phys_addr, MMIO_ADDR); - TEST_ASSERT_EQ(run->mmio.len, sizeof(unsigned long)); - TEST_ASSERT(!run->mmio.is_write, "Expected MMIO read"); - - vcpu_inject_extabt(vcpu); - vcpu_run_expect_done(vcpu); - kvm_vm_free(vm); -} - -extern char test_mmio_nisv_insn; - -static void test_mmio_nisv_guest(void) -{ - WRITE_ONCE(expected_abort_pc, (u64)&test_mmio_nisv_insn); - - asm volatile("test_mmio_nisv_insn:\n\t" - "ldr x0, [%0], #8\n\t" - : : "r" (MMIO_ADDR) : "x0", "memory"); - - GUEST_FAIL("MMIO instruction should not retire"); -} - -/* - * Test that the KVM_RUN ioctl fails for ESR_EL2.ISV=0 MMIO aborts if userspace - * hasn't enabled KVM_CAP_ARM_NISV_TO_USER. - */ -static void test_mmio_nisv(void) -{ - struct kvm_vcpu *vcpu; - struct kvm_vm *vm = vm_create_with_dabt_handler(&vcpu, test_mmio_nisv_guest, - unexpected_dabt_handler); - - TEST_ASSERT(_vcpu_run(vcpu), "Expected nonzero return code from KVM_RUN"); - TEST_ASSERT_EQ(errno, ENOSYS); - - kvm_vm_free(vm); -} - -/* - * Test that ESR_EL2.ISV=0 MMIO aborts reach userspace and that an injected SEA - * reaches the guest. - */ -static void test_mmio_nisv_abort(void) -{ - struct kvm_vcpu *vcpu; - struct kvm_vm *vm = vm_create_with_dabt_handler(&vcpu, test_mmio_nisv_guest, - expect_sea_handler); - struct kvm_run *run = vcpu->run; - - vm_enable_cap(vm, KVM_CAP_ARM_NISV_TO_USER, 1); - - vcpu_run(vcpu); - TEST_ASSERT_KVM_EXIT_REASON(vcpu, KVM_EXIT_ARM_NISV); - TEST_ASSERT_EQ(run->arm_nisv.fault_ipa, MMIO_ADDR); - - vcpu_inject_extabt(vcpu); - vcpu_run_expect_done(vcpu); - kvm_vm_free(vm); -} - -int main(void) -{ - test_mmio_abort(); - test_mmio_nisv(); - test_mmio_nisv_abort(); -} |