| Message ID | 1358324685-30225-7-git-send-email-bharat.bhushan@freescale.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 16.01.2013, at 09:24, Bharat Bhushan wrote: > Allow userspace to inject debug interrupt to guest. QEMU can s/QEMU/user space. > inject the debug interrupt to guest if it is not able to handle > the debug interrupt. > > Signed-off-by: Bharat Bhushan <bharat.bhushan@freescale.com> > --- > arch/powerpc/kvm/booke.c | 32 +++++++++++++++++++++++++++++++- > arch/powerpc/kvm/e500mc.c | 10 +++++++++- > 2 files changed, 40 insertions(+), 2 deletions(-) > > diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c > index faa0a0b..547797f 100644 > --- a/arch/powerpc/kvm/booke.c > +++ b/arch/powerpc/kvm/booke.c > @@ -133,6 +133,13 @@ static void kvmppc_vcpu_sync_fpu(struct kvm_vcpu *vcpu) > #endif > } > > +#ifdef CONFIG_KVM_BOOKE_HV > +static int kvmppc_core_pending_debug(struct kvm_vcpu *vcpu) > +{ > + return test_bit(BOOKE_IRQPRIO_DEBUG, &vcpu->arch.pending_exceptions); > +} > +#endif > + > /* > * Helper function for "full" MSR writes. No need to call this if only > * EE/CE/ME/DE/RI are changing. > @@ -144,7 +151,11 @@ void kvmppc_set_msr(struct kvm_vcpu *vcpu, u32 new_msr) > #ifdef CONFIG_KVM_BOOKE_HV > new_msr |= MSR_GS; > > - if (vcpu->guest_debug) > + /* > + * Set MSR_DE if the hardware debug resources are owned by user-space > + * and there is no debug interrupt pending for guest to handle. Why? And why is this whole thing only executed on HV? Alex > + */ > + if (vcpu->guest_debug && !kvmppc_core_pending_debug(vcpu)) > new_msr |= MSR_DE; > #endif > > @@ -234,6 +245,16 @@ static void kvmppc_core_dequeue_watchdog(struct kvm_vcpu *vcpu) > clear_bit(BOOKE_IRQPRIO_WATCHDOG, &vcpu->arch.pending_exceptions); > } > > +static void kvmppc_core_queue_debug(struct kvm_vcpu *vcpu) > +{ > + kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DEBUG); > +} > + > +static void kvmppc_core_dequeue_debug(struct kvm_vcpu *vcpu) > +{ > + clear_bit(BOOKE_IRQPRIO_DEBUG, &vcpu->arch.pending_exceptions); > +} > + > static void set_guest_srr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1) > { > #ifdef CONFIG_KVM_BOOKE_HV > @@ -1278,6 +1299,7 @@ static void get_sregs_base(struct kvm_vcpu *vcpu, > sregs->u.e.dec = kvmppc_get_dec(vcpu, tb); > sregs->u.e.tb = tb; > sregs->u.e.vrsave = vcpu->arch.vrsave; > + sregs->u.e.dbsr = vcpu->arch.dbsr; > } > > static int set_sregs_base(struct kvm_vcpu *vcpu, > @@ -1310,6 +1332,14 @@ static int set_sregs_base(struct kvm_vcpu *vcpu, > update_timer_ints(vcpu); > } > > + if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_DBSR) { > + vcpu->arch.dbsr = sregs->u.e.dbsr; > + if (vcpu->arch.dbsr) > + kvmppc_core_queue_debug(vcpu); > + else > + kvmppc_core_dequeue_debug(vcpu); > + } > + > return 0; > } > > diff --git a/arch/powerpc/kvm/e500mc.c b/arch/powerpc/kvm/e500mc.c > index 81abe92..7d90622 100644 > --- a/arch/powerpc/kvm/e500mc.c > +++ b/arch/powerpc/kvm/e500mc.c > @@ -208,7 +208,7 @@ void kvmppc_core_get_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) > struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); > > sregs->u.e.features |= KVM_SREGS_E_ARCH206_MMU | KVM_SREGS_E_PM | > - KVM_SREGS_E_PC; > + KVM_SREGS_E_PC | KVM_SREGS_E_ED; > sregs->u.e.impl_id = KVM_SREGS_E_IMPL_FSL; > > sregs->u.e.impl.fsl.features = 0; > @@ -216,6 +216,9 @@ void kvmppc_core_get_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) > sregs->u.e.impl.fsl.hid0 = vcpu_e500->hid0; > sregs->u.e.impl.fsl.mcar = vcpu_e500->mcar; > > + sregs->u.e.dsrr0 = vcpu->arch.dsrr0; > + sregs->u.e.dsrr1 = vcpu->arch.dsrr1; > + > kvmppc_get_sregs_e500_tlb(vcpu, sregs); > > sregs->u.e.ivor_high[3] = > @@ -256,6 +259,11 @@ int kvmppc_core_set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) > sregs->u.e.ivor_high[5]; > } > > + if (sregs->u.e.features & KVM_SREGS_E_ED) { > + vcpu->arch.dsrr0 = sregs->u.e.dsrr0; > + vcpu->arch.dsrr1 = sregs->u.e.dsrr1; > + } > + > return kvmppc_set_sregs_ivor(vcpu, sregs); > } > > -- > 1.7.0.4 > > > -- > To unsubscribe from this list: send the line "unsubscribe kvm-ppc" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
> -----Original Message----- > From: kvm-ppc-owner@vger.kernel.org [mailto:kvm-ppc-owner@vger.kernel.org] On > Behalf Of Alexander Graf > Sent: Friday, January 25, 2013 5:44 PM > To: Bhushan Bharat-R65777 > Cc: kvm-ppc@vger.kernel.org; kvm@vger.kernel.org; Bhushan Bharat-R65777 > Subject: Re: [PATCH 8/8] KVM:PPC:booke: Allow debug interrupt injection to guest > > > On 16.01.2013, at 09:24, Bharat Bhushan wrote: > > > Allow userspace to inject debug interrupt to guest. QEMU can > > s/QEMU/user space. > > > inject the debug interrupt to guest if it is not able to handle the > > debug interrupt. > > > > Signed-off-by: Bharat Bhushan <bharat.bhushan@freescale.com> > > --- > > arch/powerpc/kvm/booke.c | 32 +++++++++++++++++++++++++++++++- > > arch/powerpc/kvm/e500mc.c | 10 +++++++++- > > 2 files changed, 40 insertions(+), 2 deletions(-) > > > > diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c index > > faa0a0b..547797f 100644 > > --- a/arch/powerpc/kvm/booke.c > > +++ b/arch/powerpc/kvm/booke.c > > @@ -133,6 +133,13 @@ static void kvmppc_vcpu_sync_fpu(struct kvm_vcpu > > *vcpu) #endif } > > > > +#ifdef CONFIG_KVM_BOOKE_HV > > +static int kvmppc_core_pending_debug(struct kvm_vcpu *vcpu) { > > + return test_bit(BOOKE_IRQPRIO_DEBUG, > > +&vcpu->arch.pending_exceptions); } #endif > > + > > /* > > * Helper function for "full" MSR writes. No need to call this if only > > * EE/CE/ME/DE/RI are changing. > > @@ -144,7 +151,11 @@ void kvmppc_set_msr(struct kvm_vcpu *vcpu, u32 new_msr) > > #ifdef CONFIG_KVM_BOOKE_HV > > new_msr |= MSR_GS; > > > > - if (vcpu->guest_debug) > > + /* > > + * Set MSR_DE if the hardware debug resources are owned by user-space > > + * and there is no debug interrupt pending for guest to handle. > > Why? QEMU is using the IAC/DAC registers to set hardware breakpoint/watchpoints via debug ioctls. As debug events are enabled/gated by MSR_DE so somehow we need to set MSR_DE on hardware MSR when guest is running in this case. On bookehv this is how I am controlling the MSR_DE in hardware MSR. > And why is this whole thing only executed on HV? On e500v2 we always enable MSR_DE using vcpu->arch.shadow_msr in e500.c #ifndef CONFIG_KVM_BOOKE_HV - vcpu->arch.shadow_msr = MSR_USER | MSR_IS | MSR_DS; + vcpu->arch.shadow_msr = MSR_USER | MSR_DE | MSR_IS | MSR_DS; vcpu->arch.shadow_pid = 1; vcpu->arch.shared->msr = 0; #endif Thanks -Bharat > > > Alex > > > + */ > > + if (vcpu->guest_debug && !kvmppc_core_pending_debug(vcpu)) > > new_msr |= MSR_DE; > > #endif > > > > @@ -234,6 +245,16 @@ static void kvmppc_core_dequeue_watchdog(struct kvm_vcpu > *vcpu) > > clear_bit(BOOKE_IRQPRIO_WATCHDOG, &vcpu->arch.pending_exceptions); > > } > > > > +static void kvmppc_core_queue_debug(struct kvm_vcpu *vcpu) > > +{ > > + kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DEBUG); > > +} > > + > > +static void kvmppc_core_dequeue_debug(struct kvm_vcpu *vcpu) > > +{ > > + clear_bit(BOOKE_IRQPRIO_DEBUG, &vcpu->arch.pending_exceptions); > > +} > > + > > static void set_guest_srr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1) > > { > > #ifdef CONFIG_KVM_BOOKE_HV > > @@ -1278,6 +1299,7 @@ static void get_sregs_base(struct kvm_vcpu *vcpu, > > sregs->u.e.dec = kvmppc_get_dec(vcpu, tb); > > sregs->u.e.tb = tb; > > sregs->u.e.vrsave = vcpu->arch.vrsave; > > + sregs->u.e.dbsr = vcpu->arch.dbsr; > > } > > > > static int set_sregs_base(struct kvm_vcpu *vcpu, > > @@ -1310,6 +1332,14 @@ static int set_sregs_base(struct kvm_vcpu *vcpu, > > update_timer_ints(vcpu); > > } > > > > + if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_DBSR) { > > + vcpu->arch.dbsr = sregs->u.e.dbsr; > > + if (vcpu->arch.dbsr) > > + kvmppc_core_queue_debug(vcpu); > > + else > > + kvmppc_core_dequeue_debug(vcpu); > > + } > > + > > return 0; > > } > > > > diff --git a/arch/powerpc/kvm/e500mc.c b/arch/powerpc/kvm/e500mc.c > > index 81abe92..7d90622 100644 > > --- a/arch/powerpc/kvm/e500mc.c > > +++ b/arch/powerpc/kvm/e500mc.c > > @@ -208,7 +208,7 @@ void kvmppc_core_get_sregs(struct kvm_vcpu *vcpu, struct > kvm_sregs *sregs) > > struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); > > > > sregs->u.e.features |= KVM_SREGS_E_ARCH206_MMU | KVM_SREGS_E_PM | > > - KVM_SREGS_E_PC; > > + KVM_SREGS_E_PC | KVM_SREGS_E_ED; > > sregs->u.e.impl_id = KVM_SREGS_E_IMPL_FSL; > > > > sregs->u.e.impl.fsl.features = 0; > > @@ -216,6 +216,9 @@ void kvmppc_core_get_sregs(struct kvm_vcpu *vcpu, struct > kvm_sregs *sregs) > > sregs->u.e.impl.fsl.hid0 = vcpu_e500->hid0; > > sregs->u.e.impl.fsl.mcar = vcpu_e500->mcar; > > > > + sregs->u.e.dsrr0 = vcpu->arch.dsrr0; > > + sregs->u.e.dsrr1 = vcpu->arch.dsrr1; > > + > > kvmppc_get_sregs_e500_tlb(vcpu, sregs); > > > > sregs->u.e.ivor_high[3] = > > @@ -256,6 +259,11 @@ int kvmppc_core_set_sregs(struct kvm_vcpu *vcpu, struct > kvm_sregs *sregs) > > sregs->u.e.ivor_high[5]; > > } > > > > + if (sregs->u.e.features & KVM_SREGS_E_ED) { > > + vcpu->arch.dsrr0 = sregs->u.e.dsrr0; > > + vcpu->arch.dsrr1 = sregs->u.e.dsrr1; > > + } > > + > > return kvmppc_set_sregs_ivor(vcpu, sregs); > > } > > > > -- > > 1.7.0.4 > > > > > > -- > > To unsubscribe from this list: send the line "unsubscribe kvm-ppc" in > > the body of a message to majordomo@vger.kernel.org > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > -- > To unsubscribe from this list: send the line "unsubscribe kvm-ppc" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 30.01.2013, at 12:12, Bhushan Bharat-R65777 wrote: > > >> -----Original Message----- >> From: kvm-ppc-owner@vger.kernel.org [mailto:kvm-ppc-owner@vger.kernel.org] On >> Behalf Of Alexander Graf >> Sent: Friday, January 25, 2013 5:44 PM >> To: Bhushan Bharat-R65777 >> Cc: kvm-ppc@vger.kernel.org; kvm@vger.kernel.org; Bhushan Bharat-R65777 >> Subject: Re: [PATCH 8/8] KVM:PPC:booke: Allow debug interrupt injection to guest >> >> >> On 16.01.2013, at 09:24, Bharat Bhushan wrote: >> >>> Allow userspace to inject debug interrupt to guest. QEMU can >> >> s/QEMU/user space. >> >>> inject the debug interrupt to guest if it is not able to handle the >>> debug interrupt. >>> >>> Signed-off-by: Bharat Bhushan <bharat.bhushan@freescale.com> >>> --- >>> arch/powerpc/kvm/booke.c | 32 +++++++++++++++++++++++++++++++- >>> arch/powerpc/kvm/e500mc.c | 10 +++++++++- >>> 2 files changed, 40 insertions(+), 2 deletions(-) >>> >>> diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c index >>> faa0a0b..547797f 100644 >>> --- a/arch/powerpc/kvm/booke.c >>> +++ b/arch/powerpc/kvm/booke.c >>> @@ -133,6 +133,13 @@ static void kvmppc_vcpu_sync_fpu(struct kvm_vcpu >>> *vcpu) #endif } >>> >>> +#ifdef CONFIG_KVM_BOOKE_HV >>> +static int kvmppc_core_pending_debug(struct kvm_vcpu *vcpu) { >>> + return test_bit(BOOKE_IRQPRIO_DEBUG, >>> +&vcpu->arch.pending_exceptions); } #endif >>> + >>> /* >>> * Helper function for "full" MSR writes. No need to call this if only >>> * EE/CE/ME/DE/RI are changing. >>> @@ -144,7 +151,11 @@ void kvmppc_set_msr(struct kvm_vcpu *vcpu, u32 new_msr) >>> #ifdef CONFIG_KVM_BOOKE_HV >>> new_msr |= MSR_GS; >>> >>> - if (vcpu->guest_debug) >>> + /* >>> + * Set MSR_DE if the hardware debug resources are owned by user-space >>> + * and there is no debug interrupt pending for guest to handle. >> >> Why? > > QEMU is using the IAC/DAC registers to set hardware breakpoint/watchpoints via debug ioctls. As debug events are enabled/gated by MSR_DE so somehow we need to set MSR_DE on hardware MSR when guest is running in this case. Reading this 5 times I still have no idea what you're really checking for here. Maybe the naming for kvmppc_core_pending_debug is just unnatural? What does that function do really? > > On bookehv this is how I am controlling the MSR_DE in hardware MSR. > >> And why is this whole thing only executed on HV? > > On e500v2 we always enable MSR_DE using vcpu->arch.shadow_msr in e500.c > #ifndef CONFIG_KVM_BOOKE_HV > - vcpu->arch.shadow_msr = MSR_USER | MSR_IS | MSR_DS; > + vcpu->arch.shadow_msr = MSR_USER | MSR_DE | MSR_IS | MSR_DS; Why? How is e500v2 any different wrt debug? And why wouldn't that work for e500mc? Alex -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 01/31/2013 06:04:29 AM, Alexander Graf wrote: > > On 30.01.2013, at 12:12, Bhushan Bharat-R65777 wrote: > > > On bookehv this is how I am controlling the MSR_DE in hardware MSR. > > > >> And why is this whole thing only executed on HV? > > > > On e500v2 we always enable MSR_DE using vcpu->arch.shadow_msr in > e500.c > > #ifndef CONFIG_KVM_BOOKE_HV > > - vcpu->arch.shadow_msr = MSR_USER | MSR_IS | MSR_DS; > > + vcpu->arch.shadow_msr = MSR_USER | MSR_DE | MSR_IS | MSR_DS; > > Why? How is e500v2 any different wrt debug? And why wouldn't that > work for e500mc? shadow_msr isn't used at all on bookehv. -Scott -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c index faa0a0b..547797f 100644 --- a/arch/powerpc/kvm/booke.c +++ b/arch/powerpc/kvm/booke.c @@ -133,6 +133,13 @@ static void kvmppc_vcpu_sync_fpu(struct kvm_vcpu *vcpu) #endif } +#ifdef CONFIG_KVM_BOOKE_HV +static int kvmppc_core_pending_debug(struct kvm_vcpu *vcpu) +{ + return test_bit(BOOKE_IRQPRIO_DEBUG, &vcpu->arch.pending_exceptions); +} +#endif + /* * Helper function for "full" MSR writes. No need to call this if only * EE/CE/ME/DE/RI are changing. @@ -144,7 +151,11 @@ void kvmppc_set_msr(struct kvm_vcpu *vcpu, u32 new_msr) #ifdef CONFIG_KVM_BOOKE_HV new_msr |= MSR_GS; - if (vcpu->guest_debug) + /* + * Set MSR_DE if the hardware debug resources are owned by user-space + * and there is no debug interrupt pending for guest to handle. + */ + if (vcpu->guest_debug && !kvmppc_core_pending_debug(vcpu)) new_msr |= MSR_DE; #endif @@ -234,6 +245,16 @@ static void kvmppc_core_dequeue_watchdog(struct kvm_vcpu *vcpu) clear_bit(BOOKE_IRQPRIO_WATCHDOG, &vcpu->arch.pending_exceptions); } +static void kvmppc_core_queue_debug(struct kvm_vcpu *vcpu) +{ + kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DEBUG); +} + +static void kvmppc_core_dequeue_debug(struct kvm_vcpu *vcpu) +{ + clear_bit(BOOKE_IRQPRIO_DEBUG, &vcpu->arch.pending_exceptions); +} + static void set_guest_srr(struct kvm_vcpu *vcpu, unsigned long srr0, u32 srr1) { #ifdef CONFIG_KVM_BOOKE_HV @@ -1278,6 +1299,7 @@ static void get_sregs_base(struct kvm_vcpu *vcpu, sregs->u.e.dec = kvmppc_get_dec(vcpu, tb); sregs->u.e.tb = tb; sregs->u.e.vrsave = vcpu->arch.vrsave; + sregs->u.e.dbsr = vcpu->arch.dbsr; } static int set_sregs_base(struct kvm_vcpu *vcpu, @@ -1310,6 +1332,14 @@ static int set_sregs_base(struct kvm_vcpu *vcpu, update_timer_ints(vcpu); } + if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_DBSR) { + vcpu->arch.dbsr = sregs->u.e.dbsr; + if (vcpu->arch.dbsr) + kvmppc_core_queue_debug(vcpu); + else + kvmppc_core_dequeue_debug(vcpu); + } + return 0; } diff --git a/arch/powerpc/kvm/e500mc.c b/arch/powerpc/kvm/e500mc.c index 81abe92..7d90622 100644 --- a/arch/powerpc/kvm/e500mc.c +++ b/arch/powerpc/kvm/e500mc.c @@ -208,7 +208,7 @@ void kvmppc_core_get_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); sregs->u.e.features |= KVM_SREGS_E_ARCH206_MMU | KVM_SREGS_E_PM | - KVM_SREGS_E_PC; + KVM_SREGS_E_PC | KVM_SREGS_E_ED; sregs->u.e.impl_id = KVM_SREGS_E_IMPL_FSL; sregs->u.e.impl.fsl.features = 0; @@ -216,6 +216,9 @@ void kvmppc_core_get_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) sregs->u.e.impl.fsl.hid0 = vcpu_e500->hid0; sregs->u.e.impl.fsl.mcar = vcpu_e500->mcar; + sregs->u.e.dsrr0 = vcpu->arch.dsrr0; + sregs->u.e.dsrr1 = vcpu->arch.dsrr1; + kvmppc_get_sregs_e500_tlb(vcpu, sregs); sregs->u.e.ivor_high[3] = @@ -256,6 +259,11 @@ int kvmppc_core_set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) sregs->u.e.ivor_high[5]; } + if (sregs->u.e.features & KVM_SREGS_E_ED) { + vcpu->arch.dsrr0 = sregs->u.e.dsrr0; + vcpu->arch.dsrr1 = sregs->u.e.dsrr1; + } + return kvmppc_set_sregs_ivor(vcpu, sregs); }
Allow userspace to inject debug interrupt to guest. QEMU can inject the debug interrupt to guest if it is not able to handle the debug interrupt. Signed-off-by: Bharat Bhushan <bharat.bhushan@freescale.com> --- arch/powerpc/kvm/booke.c | 32 +++++++++++++++++++++++++++++++- arch/powerpc/kvm/e500mc.c | 10 +++++++++- 2 files changed, 40 insertions(+), 2 deletions(-)