kvm: x86: Push kvm_arch_debug to kvm_arch_handle_exit
There are no generic bits remaining in the handling of KVM_EXIT_DEBUG. So push its logic completely into arch hands, i.e. only x86 so far. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
parent
2a4dac8350
commit
f2574737f6
11
kvm-all.c
11
kvm-all.c
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@ -975,17 +975,6 @@ int kvm_cpu_exec(CPUState *env)
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ret = kvm_handle_internal_error(env, run);
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ret = kvm_handle_internal_error(env, run);
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break;
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break;
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#endif
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#endif
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#ifdef KVM_CAP_SET_GUEST_DEBUG
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case KVM_EXIT_DEBUG:
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DPRINTF("kvm_exit_debug\n");
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if (kvm_arch_debug(&run->debug.arch)) {
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ret = EXCP_DEBUG;
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break;
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}
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/* re-enter, this exception was guest-internal */
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ret = 0;
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break;
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#endif /* KVM_CAP_SET_GUEST_DEBUG */
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default:
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default:
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DPRINTF("kvm_arch_handle_exit\n");
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DPRINTF("kvm_arch_handle_exit\n");
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ret = kvm_arch_handle_exit(env, run);
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ret = kvm_arch_handle_exit(env, run);
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2
kvm.h
2
kvm.h
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@ -136,8 +136,6 @@ struct kvm_sw_breakpoint {
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QTAILQ_HEAD(kvm_sw_breakpoint_head, kvm_sw_breakpoint);
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QTAILQ_HEAD(kvm_sw_breakpoint_head, kvm_sw_breakpoint);
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int kvm_arch_debug(struct kvm_debug_exit_arch *arch_info);
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struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *env,
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struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *env,
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target_ulong pc);
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target_ulong pc);
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@ -1731,31 +1731,31 @@ void kvm_arch_remove_all_hw_breakpoints(void)
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static CPUWatchpoint hw_watchpoint;
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static CPUWatchpoint hw_watchpoint;
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int kvm_arch_debug(struct kvm_debug_exit_arch *arch_info)
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static int kvm_handle_debug(struct kvm_debug_exit_arch *arch_info)
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{
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{
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int handle = 0;
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int ret = 0;
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int n;
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int n;
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if (arch_info->exception == 1) {
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if (arch_info->exception == 1) {
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if (arch_info->dr6 & (1 << 14)) {
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if (arch_info->dr6 & (1 << 14)) {
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if (cpu_single_env->singlestep_enabled) {
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if (cpu_single_env->singlestep_enabled) {
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handle = 1;
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ret = EXCP_DEBUG;
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}
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}
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} else {
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} else {
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for (n = 0; n < 4; n++) {
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for (n = 0; n < 4; n++) {
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if (arch_info->dr6 & (1 << n)) {
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if (arch_info->dr6 & (1 << n)) {
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switch ((arch_info->dr7 >> (16 + n*4)) & 0x3) {
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switch ((arch_info->dr7 >> (16 + n*4)) & 0x3) {
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case 0x0:
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case 0x0:
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handle = 1;
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ret = EXCP_DEBUG;
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break;
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break;
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case 0x1:
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case 0x1:
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handle = 1;
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ret = EXCP_DEBUG;
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cpu_single_env->watchpoint_hit = &hw_watchpoint;
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cpu_single_env->watchpoint_hit = &hw_watchpoint;
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hw_watchpoint.vaddr = hw_breakpoint[n].addr;
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hw_watchpoint.vaddr = hw_breakpoint[n].addr;
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hw_watchpoint.flags = BP_MEM_WRITE;
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hw_watchpoint.flags = BP_MEM_WRITE;
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break;
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break;
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case 0x3:
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case 0x3:
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handle = 1;
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ret = EXCP_DEBUG;
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cpu_single_env->watchpoint_hit = &hw_watchpoint;
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cpu_single_env->watchpoint_hit = &hw_watchpoint;
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hw_watchpoint.vaddr = hw_breakpoint[n].addr;
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hw_watchpoint.vaddr = hw_breakpoint[n].addr;
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hw_watchpoint.flags = BP_MEM_ACCESS;
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hw_watchpoint.flags = BP_MEM_ACCESS;
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@ -1765,17 +1765,18 @@ int kvm_arch_debug(struct kvm_debug_exit_arch *arch_info)
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}
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}
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}
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}
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} else if (kvm_find_sw_breakpoint(cpu_single_env, arch_info->pc)) {
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} else if (kvm_find_sw_breakpoint(cpu_single_env, arch_info->pc)) {
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handle = 1;
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ret = EXCP_DEBUG;
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}
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}
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if (!handle) {
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if (ret == 0) {
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cpu_synchronize_state(cpu_single_env);
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cpu_synchronize_state(cpu_single_env);
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assert(cpu_single_env->exception_injected == -1);
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assert(cpu_single_env->exception_injected == -1);
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/* pass to guest */
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cpu_single_env->exception_injected = arch_info->exception;
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cpu_single_env->exception_injected = arch_info->exception;
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cpu_single_env->has_error_code = 0;
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cpu_single_env->has_error_code = 0;
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}
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}
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return handle;
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return ret;
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}
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}
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void kvm_arch_update_guest_debug(CPUState *env, struct kvm_guest_debug *dbg)
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void kvm_arch_update_guest_debug(CPUState *env, struct kvm_guest_debug *dbg)
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@ -1851,6 +1852,12 @@ int kvm_arch_handle_exit(CPUState *env, struct kvm_run *run)
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run->ex.exception, run->ex.error_code);
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run->ex.exception, run->ex.error_code);
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ret = -1;
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ret = -1;
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break;
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break;
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#ifdef KVM_CAP_SET_GUEST_DEBUG
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case KVM_EXIT_DEBUG:
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DPRINTF("kvm_exit_debug\n");
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ret = kvm_handle_debug(&run->debug.arch);
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break;
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#endif /* KVM_CAP_SET_GUEST_DEBUG */
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default:
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default:
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fprintf(stderr, "KVM: unknown exit reason %d\n", run->exit_reason);
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fprintf(stderr, "KVM: unknown exit reason %d\n", run->exit_reason);
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ret = -1;
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ret = -1;
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