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| author | Bharat Bhushan <Bharat.Bhushan@freescale.com> | 2014-08-06 08:38:54 +0200 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2014-09-22 10:11:30 +0200 |
| commit | 2190991e7caa2e2a2b976e9ed16e55f8c51623be (patch) | |
| tree | 448a459083b334c8fdb21dbef118b42010870093 /arch/powerpc/kvm/booke.c | |
| parent | KVM: PPC: BOOKE: Allow guest to change MSR_DE (diff) | |
| download | linux-2190991e7caa2e2a2b976e9ed16e55f8c51623be.tar.xz linux-2190991e7caa2e2a2b976e9ed16e55f8c51623be.zip | |
KVM: PPC: BOOKE: Clear guest dbsr in userspace exit KVM_EXIT_DEBUG
Dbsr is not visible to userspace and we do not think any need to
expose this to userspace because:
Userspace cannot inject debug interrupt to guest (as this
does not know guest ability to handle debug interrupt), so
userspace will always clear DBSR.
Now if userspace has to always clear DBSR in KVM_EXIT_DEBUG
handling then clearing dbsr in kernel looks simple as this
avoid doing SET_SREGS/set_one_reg() to clear DBSR
Signed-off-by: Bharat Bhushan <Bharat.Bhushan@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'arch/powerpc/kvm/booke.c')
| -rw-r--r-- | arch/powerpc/kvm/booke.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c index 322da7d2334a..b4ab86cdb51d 100644 --- a/arch/powerpc/kvm/booke.c +++ b/arch/powerpc/kvm/booke.c @@ -735,6 +735,8 @@ static int kvmppc_handle_debug(struct kvm_run *run, struct kvm_vcpu *vcpu) struct debug_reg *dbg_reg = &(vcpu->arch.shadow_dbg_reg); u32 dbsr = vcpu->arch.dbsr; + /* Clear guest dbsr (vcpu->arch.dbsr) */ + vcpu->arch.dbsr = 0; run->debug.arch.status = 0; run->debug.arch.address = vcpu->arch.pc; |