> -----Original Message----- > From: Alexander Graf [mailto:agraf@xxxxxxx] > Sent: Thursday, January 31, 2013 11:23 PM > To: Bhushan Bharat-R65777 > Cc: kvm-ppc@xxxxxxxxxxxxxxx; kvm@xxxxxxxxxxxxxxx > Subject: Re: [PATCH 4/8] Added ONE_REG interface for debug instruction > > > On 31.01.2013, at 18:44, Bhushan Bharat-R65777 wrote: > > > > > > >> -----Original Message----- > >> From: Alexander Graf [mailto:agraf@xxxxxxx] > >> Sent: Friday, January 25, 2013 5:18 PM > >> To: Bhushan Bharat-R65777 > >> Cc: kvm-ppc@xxxxxxxxxxxxxxx; kvm@xxxxxxxxxxxxxxx; Bhushan > >> Bharat-R65777 > >> Subject: Re: [PATCH 4/8] Added ONE_REG interface for debug > >> instruction > >> > >> > >> On 16.01.2013, at 09:24, Bharat Bhushan wrote: > >> > >>> This patch adds the one_reg interface to get the special instruction > >>> to be used for setting software breakpoint from userspace. > >>> > >>> Signed-off-by: Bharat Bhushan <bharat.bhushan@xxxxxxxxxxxxx> > >>> --- > >>> Documentation/virtual/kvm/api.txt | 1 + > >>> arch/powerpc/include/asm/kvm_ppc.h | 1 + > >>> arch/powerpc/include/uapi/asm/kvm.h | 3 +++ > >>> arch/powerpc/kvm/44x.c | 5 +++++ > >>> arch/powerpc/kvm/booke.c | 10 ++++++++++ > >>> arch/powerpc/kvm/e500.c | 5 +++++ > >>> arch/powerpc/kvm/e500.h | 9 +++++++++ > >>> arch/powerpc/kvm/e500mc.c | 5 +++++ > >>> 8 files changed, 39 insertions(+), 0 deletions(-) > >>> > >>> diff --git a/Documentation/virtual/kvm/api.txt > >>> b/Documentation/virtual/kvm/api.txt > >>> index 09905cb..7e8be9e 100644 > >>> --- a/Documentation/virtual/kvm/api.txt > >>> +++ b/Documentation/virtual/kvm/api.txt > >>> @@ -1775,6 +1775,7 @@ registers, find a list below: > >>> PPC | KVM_REG_PPC_VPA_DTL | 128 > >>> PPC | KVM_REG_PPC_EPCR | 32 > >>> PPC | KVM_REG_PPC_EPR | 32 > >>> + PPC | KVM_REG_PPC_DEBUG_INST| 32 > >>> > >>> 4.69 KVM_GET_ONE_REG > >>> > >>> diff --git a/arch/powerpc/include/asm/kvm_ppc.h > >>> b/arch/powerpc/include/asm/kvm_ppc.h > >>> index 44a657a..b3c481e 100644 > >>> --- a/arch/powerpc/include/asm/kvm_ppc.h > >>> +++ b/arch/powerpc/include/asm/kvm_ppc.h > >>> @@ -235,6 +235,7 @@ union kvmppc_one_reg { > >>> > >>> void kvmppc_core_get_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs > >>> *sregs); int kvmppc_core_set_sregs(struct kvm_vcpu *vcpu, struct > >>> kvm_sregs *sregs); > >>> +u32 kvmppc_core_debug_inst_op(void); > >>> > >>> void kvmppc_get_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs > >>> *sregs); int kvmppc_set_sregs_ivor(struct kvm_vcpu *vcpu, struct > >>> kvm_sregs *sregs); diff --git a/arch/powerpc/include/uapi/asm/kvm.h > >>> b/arch/powerpc/include/uapi/asm/kvm.h > >>> index 16064d0..e81ae5b 100644 > >>> --- a/arch/powerpc/include/uapi/asm/kvm.h > >>> +++ b/arch/powerpc/include/uapi/asm/kvm.h > >>> @@ -417,4 +417,7 @@ struct kvm_get_htab_header { > >>> #define KVM_REG_PPC_EPCR (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x85) > >>> #define KVM_REG_PPC_EPR (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x86) > >>> > >>> +/* Debugging: Special instruction for software breakpoint */ > >>> +#define KVM_REG_PPC_DEBUG_INST (KVM_REG_PPC | KVM_REG_SIZE_U32 | > >>> +0x87) > >>> + > >>> #endif /* __LINUX_KVM_POWERPC_H */ > >>> diff --git a/arch/powerpc/kvm/44x.c b/arch/powerpc/kvm/44x.c index > >>> 3d7fd21..41501be 100644 > >>> --- a/arch/powerpc/kvm/44x.c > >>> +++ b/arch/powerpc/kvm/44x.c > >>> @@ -114,6 +114,11 @@ int kvmppc_core_vcpu_translate(struct kvm_vcpu *vcpu, > >>> return 0; > >>> } > >>> > >>> +u32 kvmppc_core_debug_inst_op(void) { > >>> + return -1; > > The way you handle it here this needs to be an int > kvmppc_core_debug_inst_op(u32 *inst) so you can return an error for 440. I don't > think it's worth to worry about a case where we don't know about the inst > though. Just return the same as what we use on e500v2 here. > > >>> +} > >>> + > >>> void kvmppc_core_get_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs > >>> *sregs) { > >>> kvmppc_get_sregs_ivor(vcpu, sregs); diff --git > >>> a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c index > >>> d2f502d..453a10f 100644 > >>> --- a/arch/powerpc/kvm/booke.c > >>> +++ b/arch/powerpc/kvm/booke.c > >> > >> Please provide the DEBUG_INST on a more global level - across all ppc > subarchs. > > > > Do you mean defining in powerpc.c ? > > > > We are using one_reg for DEBUG_INST and one_reg_ioctl and defined in > respective subarchs (booke and books have their separate handler). So how you > want this to be defined in more common way for all subarchs? > > Just add it to all subarch's one_reg handlers. And what book3s etc should return? -1 ? Thanks -Bharat -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
