1 // SPDX-License-Identifier: GPL-2.0
38 #define  PC(v)  ((uint64_t)&(v))  macro
183 	/* Setup a context-aware breakpoint for Linked Context ID Match */  in install_wp_ctx()
189 	/* Setup a linked watchpoint (linked to the context-aware breakpoint) */  in install_wp_ctx()
204 	/* Setup a context-aware breakpoint for Linked Context ID Match */  in install_hw_bp_ctx()
212 	 * to the context-aware breakpoint.  in install_hw_bp_ctx()
241 	/* Software-breakpoint */  in guest_code()
244 	GUEST_ASSERT_EQ(sw_bp_addr, PC(sw_bp));  in guest_code()
246 	/* Hardware-breakpoint */  in guest_code()
248 	install_hw_bp(bpn, PC(hw_bp));  in guest_code()
250 	GUEST_ASSERT_EQ(hw_bp_addr, PC(hw_bp));  in guest_code()
252 	/* Hardware-breakpoint + svc */  in guest_code()
254 	install_hw_bp(bpn, PC(bp_svc));  in guest_code()
256 	GUEST_ASSERT_EQ(hw_bp_addr, PC(bp_svc));  in guest_code()
257 	GUEST_ASSERT_EQ(svc_addr, PC(bp_svc) + 4);  in guest_code()
259 	/* Hardware-breakpoint + software-breakpoint */  in guest_code()
261 	install_hw_bp(bpn, PC(bp_brk));  in guest_code()
263 	GUEST_ASSERT_EQ(sw_bp_addr, PC(bp_brk));  in guest_code()
264 	GUEST_ASSERT_EQ(hw_bp_addr, PC(bp_brk));  in guest_code()
268 	install_wp(wpn, PC(write_data));  in guest_code()
271 	GUEST_ASSERT_EQ(wp_data_addr, PC(write_data));  in guest_code()
273 	/* Single-step */  in guest_code()
282 	GUEST_ASSERT_EQ(ss_addr[0], PC(ss_start));  in guest_code()
283 	GUEST_ASSERT_EQ(ss_addr[1], PC(ss_start) + 4);  in guest_code()
284 	GUEST_ASSERT_EQ(ss_addr[2], PC(ss_start) + 8);  in guest_code()
286 	/* OS Lock does not block software-breakpoint */  in guest_code()
291 	GUEST_ASSERT_EQ(sw_bp_addr, PC(sw_bp2));  in guest_code()
293 	/* OS Lock blocking hardware-breakpoint */  in guest_code()
296 	install_hw_bp(bpn, PC(hw_bp2));  in guest_code()
306 	install_wp(wpn, PC(write_data));  in guest_code()
311 	/* OS Lock blocking single-step */  in guest_code()
323 	/* Linked hardware-breakpoint */  in guest_code()
326 	install_hw_bp_ctx(bpn, ctx_bpn, PC(hw_bp_ctx), ctx);  in guest_code()
332 	GUEST_ASSERT_EQ(hw_bp_addr, PC(hw_bp_ctx));  in guest_code()
336 	install_wp_ctx(wpn, ctx_bpn, PC(write_data), ctx);  in guest_code()
342 	GUEST_ASSERT_EQ(wp_data_addr, PC(write_data));  in guest_code()
349 	sw_bp_addr = regs->pc;  in guest_sw_bp_handler()
350 	regs->pc += 4;  in guest_sw_bp_handler()
355 	hw_bp_addr = regs->pc;  in guest_hw_bp_handler()
356 	regs->pstate |= SPSR_D;  in guest_hw_bp_handler()
362 	wp_addr = regs->pc;  in guest_wp_handler()
363 	regs->pstate |= SPSR_D;  in guest_wp_handler()
369 	ss_addr[ss_idx++] = regs->pc;  in guest_ss_handler()
370 	regs->pstate |= SPSR_SS;  in guest_ss_handler()
375 	svc_addr = regs->pc;  in guest_svc_handler()
391 		 * the ucall structures, and the built-in "atomics" are usually  in guest_code_ss()
400 		 * The userspace will verify that the pc is as expected during  in guest_code_ss()
471 	uint64_t pc, cmd;  in test_single_step_from_userspace()  local
477 	run = vcpu->run;  in test_single_step_from_userspace()
482 		if (run->exit_reason != KVM_EXIT_DEBUG) {  in test_single_step_from_userspace()
503 		/* Check if the current pc is expected. */  in test_single_step_from_userspace()
504 		pc = vcpu_get_reg(vcpu, ARM64_CORE_REG(regs.pc));  in test_single_step_from_userspace()
505 		TEST_ASSERT(!test_pc || pc == test_pc,  in test_single_step_from_userspace()
506 			    "Unexpected pc 0x%lx (expected 0x%lx)",  in test_single_step_from_userspace()
507 			    pc, test_pc);  in test_single_step_from_userspace()
509 		if ((pc + 4) == (uint64_t)&iter_ss_end) {  in test_single_step_from_userspace()
518 		 * If the current pc is between iter_ss_bgin and  in test_single_step_from_userspace()
519 		 * iter_ss_end, the pc for the next KVM_EXIT_DEBUG should  in test_single_step_from_userspace()
520 		 * be the current pc + 4.  in test_single_step_from_userspace()
522 		if ((pc >= (uint64_t)&iter_ss_begin) &&  in test_single_step_from_userspace()
523 		    (pc < (uint64_t)&iter_ss_end))  in test_single_step_from_userspace()
524 			test_pc = pc + 4;  in test_single_step_from_userspace()
534  * context-aware breakpoint# with the given ID_AA64DFR0_EL1 configuration.
554 	/* Number of normal (non-context aware) breakpoints */  in test_guest_debug_exceptions_all()
555 	normal_brp_num = brp_num - ctx_brp_num;  in test_guest_debug_exceptions_all()
572 	printf("Usage: %s [-h] [-i iterations of the single step test]\n", name);  in help()
591 	while ((opt = getopt(argc, argv, "i:")) != -1) {  in main()