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powerpc/kvm: support to handle sw breakpoint

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This patch adds kernel side support for software breakpoint.
Design is that, by using an illegal instruction, we trap to hypervisor
via Emulation Assistance interrupt, where we check for the illegal instruction
and accordingly we return to Host or Guest. Patch also adds support for
software breakpoint in PR KVM.

Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Madhavan Srinivasan
2014-09-09 22:37:35 +05:30
committed by Alexander Graf
parent d2ca32a2d4
commit a59c1d9e60
5 changed files with 63 additions and 5 deletions
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3
arch/powerpc/kvm/book3s.c
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@@ -715,7 +715,8 @@ int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
struct kvm_guest_debug *dbg)
{
return -EINVAL;
vcpu->guest_debug = dbg->control;
return 0;
}
void kvmppc_decrementer_func(struct kvm_vcpu *vcpu)