On Tue, Apr 04, 2017 at 05:34:01PM +0200, Christoffer Dall wrote: > On Fri, Mar 31, 2017 at 06:06:52PM +0200, Andrew Jones wrote: > > Make sure we don't leave vcpu requests we don't intend to > > handle later set in the request bitmap. If we don't clear > > them, then kvm_request_pending() may return true when we > > don't want it to. > > > > Signed-off-by: Andrew Jones <drjones@xxxxxxxxxx> > > Acked-by: Christoffer Dall <cdall@xxxxxxxxxx> > > --- > > arch/arm/kvm/handle_exit.c | 1 + > > arch/arm/kvm/psci.c | 1 + > > arch/arm64/kvm/handle_exit.c | 1 + > > 3 files changed, 3 insertions(+) > > > > diff --git a/arch/arm/kvm/handle_exit.c b/arch/arm/kvm/handle_exit.c > > index 96af65a30d78..ffb2406e5905 100644 > > --- a/arch/arm/kvm/handle_exit.c > > +++ b/arch/arm/kvm/handle_exit.c > > @@ -72,6 +72,7 @@ static int kvm_handle_wfx(struct kvm_vcpu *vcpu, struct kvm_run *run) > > trace_kvm_wfx(*vcpu_pc(vcpu), false); > > vcpu->stat.wfi_exit_stat++; > > kvm_vcpu_block(vcpu); > > + clear_bit(KVM_REQ_UNHALT, &vcpu->requests); > > I actually don't understand the idea behind KVM_REQ_UNHALT? > > It seems there's a semantic difference that architectures should adhere > by when returning from kvm_vcpu_block() with or without KVM_REQ_UNHALT > set (i.e. if the vcpu was runnable when kvm_vcpu_check_blocK() was > called?) - can you explain what the deal is? Perhaps that belongs in > the documentation patch. Yup, will address this in the doc patch. > > > } > > > > kvm_skip_instr(vcpu, kvm_vcpu_trap_il_is32bit(vcpu)); > > diff --git a/arch/arm/kvm/psci.c b/arch/arm/kvm/psci.c > > index c2b131527a64..82fe7eb5b6a7 100644 > > --- a/arch/arm/kvm/psci.c > > +++ b/arch/arm/kvm/psci.c > > @@ -57,6 +57,7 @@ static unsigned long kvm_psci_vcpu_suspend(struct kvm_vcpu *vcpu) > > * for KVM will preserve the register state. > > */ > > kvm_vcpu_block(vcpu); > > + clear_bit(KVM_REQ_UNHALT, &vcpu->requests); > > > > return PSCI_RET_SUCCESS; > > } > > diff --git a/arch/arm64/kvm/handle_exit.c b/arch/arm64/kvm/handle_exit.c > > index fa1b18e364fc..e4937fb2fb89 100644 > > --- a/arch/arm64/kvm/handle_exit.c > > +++ b/arch/arm64/kvm/handle_exit.c > > @@ -89,6 +89,7 @@ static int kvm_handle_wfx(struct kvm_vcpu *vcpu, struct kvm_run *run) > > trace_kvm_wfx_arm64(*vcpu_pc(vcpu), false); > > vcpu->stat.wfi_exit_stat++; > > kvm_vcpu_block(vcpu); > > + clear_bit(KVM_REQ_UNHALT, &vcpu->requests); > > } > > > > kvm_skip_instr(vcpu, kvm_vcpu_trap_il_is32bit(vcpu)); > > -- > > 2.9.3 > > > > Ignoring my comment above, for the content of this patch: > > Acked-by: Christoffer Dall <cdall@xxxxxxxxxx> Thanks, drew
