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[Qemu-devel] [PATCH v5 4/6] target-arm: kvm - support for single step
From: |
Alex Bennée |
Subject: |
[Qemu-devel] [PATCH v5 4/6] target-arm: kvm - support for single step |
Date: |
Fri, 29 May 2015 16:19:22 +0100 |
This adds support for single-step. There isn't much to do on the QEMU
side as after we set-up the request for single step via the debug ioctl
it is all handled within the kernel.
Signed-off-by: Alex Bennée <address@hidden>
---
v2
- convert to using HSR_EC
v3
- use internals.h definitions
---
target-arm/kvm.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/target-arm/kvm.c b/target-arm/kvm.c
index c3bad6f..de2865a 100644
--- a/target-arm/kvm.c
+++ b/target-arm/kvm.c
@@ -528,6 +528,13 @@ static int kvm_handle_debug(CPUState *cs, struct kvm_run
*run)
kvm_cpu_synchronize_state(cs);
switch (hsr_ec) {
+ case EC_SOFTWARESTEP:
+ if (cs->singlestep_enabled) {
+ return true;
+ } else {
+ error_report("Came out of SINGLE STEP when not enabled");
+ }
+ break;
case EC_AA64_BKPT:
if (kvm_find_sw_breakpoint(cs, env->pc)) {
return true;
@@ -588,6 +595,9 @@ int kvm_arch_on_sigbus(int code, void *addr)
void kvm_arch_update_guest_debug(CPUState *cs, struct kvm_guest_debug *dbg)
{
+ if (cs->singlestep_enabled) {
+ dbg->control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP;
+ }
if (kvm_sw_breakpoints_active(cs)) {
dbg->control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP;
}
--
2.4.1
- [Qemu-devel] [PATCH v5 0/6] QEMU support for KVM Guest Debug on arm64, Alex Bennée, 2015/05/29
- [Qemu-devel] [PATCH v5 4/6] target-arm: kvm - support for single step,
Alex Bennée <=
- [Qemu-devel] [PATCH v5 2/6] target-arm: kvm64: introduce kvm_arm_init_debug(), Alex Bennée, 2015/05/29
- [Qemu-devel] [PATCH v5 6/6] target-arm: kvm - re-inject guest debug exceptions, Alex Bennée, 2015/05/29
- [Qemu-devel] [PATCH v5 5/6] target-arm: kvm - add support for HW assisted debug, Alex Bennée, 2015/05/29
- [Qemu-devel] [PATCH v5 3/6] target-arm: kvm - implement software breakpoints, Alex Bennée, 2015/05/29
- [Qemu-devel] [PATCH v5 1/6] linux-headers: sync from my kernel tree (DEV), Alex Bennée, 2015/05/29