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Diffstat (limited to 'tools/testing/selftests/kvm/x86_64/debug_regs.c')
-rw-r--r--tools/testing/selftests/kvm/x86_64/debug_regs.c202
1 files changed, 0 insertions, 202 deletions
diff --git a/tools/testing/selftests/kvm/x86_64/debug_regs.c b/tools/testing/selftests/kvm/x86_64/debug_regs.c
deleted file mode 100644
index 8162c58a1234..000000000000
--- a/tools/testing/selftests/kvm/x86_64/debug_regs.c
+++ /dev/null
@@ -1,202 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * KVM guest debug register tests
- *
- * Copyright (C) 2020, Red Hat, Inc.
- */
-#include <stdio.h>
-#include <string.h>
-#include "kvm_util.h"
-#include "processor.h"
-
-#define VCPU_ID 0
-
-#define DR6_BD (1 << 13)
-#define DR7_GD (1 << 13)
-
-/* For testing data access debug BP */
-uint32_t guest_value;
-
-extern unsigned char sw_bp, hw_bp, write_data, ss_start, bd_start;
-
-static void guest_code(void)
-{
- /*
- * Software BP tests.
- *
- * NOTE: sw_bp need to be before the cmd here, because int3 is an
- * exception rather than a normal trap for KVM_SET_GUEST_DEBUG (we
- * capture it using the vcpu exception bitmap).
- */
- asm volatile("sw_bp: int3");
-
- /* Hardware instruction BP test */
- asm volatile("hw_bp: nop");
-
- /* Hardware data BP test */
- asm volatile("mov $1234,%%rax;\n\t"
- "mov %%rax,%0;\n\t write_data:"
- : "=m" (guest_value) : : "rax");
-
- /* Single step test, covers 2 basic instructions and 2 emulated */
- asm volatile("ss_start: "
- "xor %%rax,%%rax\n\t"
- "cpuid\n\t"
- "movl $0x1a0,%%ecx\n\t"
- "rdmsr\n\t"
- : : : "rax", "ecx");
-
- /* DR6.BD test */
- asm volatile("bd_start: mov %%dr0, %%rax" : : : "rax");
- GUEST_DONE();
-}
-
-#define CLEAR_DEBUG() memset(&debug, 0, sizeof(debug))
-#define APPLY_DEBUG() vcpu_set_guest_debug(vm, VCPU_ID, &debug)
-#define CAST_TO_RIP(v) ((unsigned long long)&(v))
-#define SET_RIP(v) do { \
- vcpu_regs_get(vm, VCPU_ID, &regs); \
- regs.rip = (v); \
- vcpu_regs_set(vm, VCPU_ID, &regs); \
- } while (0)
-#define MOVE_RIP(v) SET_RIP(regs.rip + (v));
-
-int main(void)
-{
- struct kvm_guest_debug debug;
- unsigned long long target_dr6, target_rip;
- struct kvm_regs regs;
- struct kvm_run *run;
- struct kvm_vm *vm;
- struct ucall uc;
- uint64_t cmd;
- int i;
- /* Instruction lengths starting at ss_start */
- int ss_size[4] = {
- 3, /* xor */
- 2, /* cpuid */
- 5, /* mov */
- 2, /* rdmsr */
- };
-
- if (!kvm_check_cap(KVM_CAP_SET_GUEST_DEBUG)) {
- print_skip("KVM_CAP_SET_GUEST_DEBUG not supported");
- return 0;
- }
-
- vm = vm_create_default(VCPU_ID, 0, guest_code);
- vcpu_set_cpuid(vm, VCPU_ID, kvm_get_supported_cpuid());
- run = vcpu_state(vm, VCPU_ID);
-
- /* Test software BPs - int3 */
- CLEAR_DEBUG();
- debug.control = KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP;
- APPLY_DEBUG();
- vcpu_run(vm, VCPU_ID);
- TEST_ASSERT(run->exit_reason == KVM_EXIT_DEBUG &&
- run->debug.arch.exception == BP_VECTOR &&
- run->debug.arch.pc == CAST_TO_RIP(sw_bp),
- "INT3: exit %d exception %d rip 0x%llx (should be 0x%llx)",
- run->exit_reason, run->debug.arch.exception,
- run->debug.arch.pc, CAST_TO_RIP(sw_bp));
- MOVE_RIP(1);
-
- /* Test instruction HW BP over DR[0-3] */
- for (i = 0; i < 4; i++) {
- CLEAR_DEBUG();
- debug.control = KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_HW_BP;
- debug.arch.debugreg[i] = CAST_TO_RIP(hw_bp);
- debug.arch.debugreg[7] = 0x400 | (1UL << (2*i+1));
- APPLY_DEBUG();
- vcpu_run(vm, VCPU_ID);
- target_dr6 = 0xffff0ff0 | (1UL << i);
- TEST_ASSERT(run->exit_reason == KVM_EXIT_DEBUG &&
- run->debug.arch.exception == DB_VECTOR &&
- run->debug.arch.pc == CAST_TO_RIP(hw_bp) &&
- run->debug.arch.dr6 == target_dr6,
- "INS_HW_BP (DR%d): exit %d exception %d rip 0x%llx "
- "(should be 0x%llx) dr6 0x%llx (should be 0x%llx)",
- i, run->exit_reason, run->debug.arch.exception,
- run->debug.arch.pc, CAST_TO_RIP(hw_bp),
- run->debug.arch.dr6, target_dr6);
- }
- /* Skip "nop" */
- MOVE_RIP(1);
-
- /* Test data access HW BP over DR[0-3] */
- for (i = 0; i < 4; i++) {
- CLEAR_DEBUG();
- debug.control = KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_HW_BP;
- debug.arch.debugreg[i] = CAST_TO_RIP(guest_value);
- debug.arch.debugreg[7] = 0x00000400 | (1UL << (2*i+1)) |
- (0x000d0000UL << (4*i));
- APPLY_DEBUG();
- vcpu_run(vm, VCPU_ID);
- target_dr6 = 0xffff0ff0 | (1UL << i);
- TEST_ASSERT(run->exit_reason == KVM_EXIT_DEBUG &&
- run->debug.arch.exception == DB_VECTOR &&
- run->debug.arch.pc == CAST_TO_RIP(write_data) &&
- run->debug.arch.dr6 == target_dr6,
- "DATA_HW_BP (DR%d): exit %d exception %d rip 0x%llx "
- "(should be 0x%llx) dr6 0x%llx (should be 0x%llx)",
- i, run->exit_reason, run->debug.arch.exception,
- run->debug.arch.pc, CAST_TO_RIP(write_data),
- run->debug.arch.dr6, target_dr6);
- /* Rollback the 4-bytes "mov" */
- MOVE_RIP(-7);
- }
- /* Skip the 4-bytes "mov" */
- MOVE_RIP(7);
-
- /* Test single step */
- target_rip = CAST_TO_RIP(ss_start);
- target_dr6 = 0xffff4ff0ULL;
- vcpu_regs_get(vm, VCPU_ID, &regs);
- for (i = 0; i < (sizeof(ss_size) / sizeof(ss_size[0])); i++) {
- target_rip += ss_size[i];
- CLEAR_DEBUG();
- debug.control = KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP;
- debug.arch.debugreg[7] = 0x00000400;
- APPLY_DEBUG();
- vcpu_run(vm, VCPU_ID);
- TEST_ASSERT(run->exit_reason == KVM_EXIT_DEBUG &&
- run->debug.arch.exception == DB_VECTOR &&
- run->debug.arch.pc == target_rip &&
- run->debug.arch.dr6 == target_dr6,
- "SINGLE_STEP[%d]: exit %d exception %d rip 0x%llx "
- "(should be 0x%llx) dr6 0x%llx (should be 0x%llx)",
- i, run->exit_reason, run->debug.arch.exception,
- run->debug.arch.pc, target_rip, run->debug.arch.dr6,
- target_dr6);
- }
-
- /* Finally test global disable */
- CLEAR_DEBUG();
- debug.control = KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_HW_BP;
- debug.arch.debugreg[7] = 0x400 | DR7_GD;
- APPLY_DEBUG();
- vcpu_run(vm, VCPU_ID);
- target_dr6 = 0xffff0ff0 | DR6_BD;
- TEST_ASSERT(run->exit_reason == KVM_EXIT_DEBUG &&
- run->debug.arch.exception == DB_VECTOR &&
- run->debug.arch.pc == CAST_TO_RIP(bd_start) &&
- run->debug.arch.dr6 == target_dr6,
- "DR7.GD: exit %d exception %d rip 0x%llx "
- "(should be 0x%llx) dr6 0x%llx (should be 0x%llx)",
- run->exit_reason, run->debug.arch.exception,
- run->debug.arch.pc, target_rip, run->debug.arch.dr6,
- target_dr6);
-
- /* Disable all debug controls, run to the end */
- CLEAR_DEBUG();
- APPLY_DEBUG();
-
- vcpu_run(vm, VCPU_ID);
- TEST_ASSERT(run->exit_reason == KVM_EXIT_IO, "KVM_EXIT_IO");
- cmd = get_ucall(vm, VCPU_ID, &uc);
- TEST_ASSERT(cmd == UCALL_DONE, "UCALL_DONE");
-
- kvm_vm_free(vm);
-
- return 0;
-}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.