> -----Original Message----- > From: Alexander Graf [mailto:agraf@xxxxxxx] > Sent: Thursday, July 17, 2014 9:47 PM > To: Bhushan Bharat-R65777; kvm-ppc@xxxxxxxxxxxxxxx > Cc: kvm@xxxxxxxxxxxxxxx; Wood Scott-B07421; Yoder Stuart-B08248 > Subject: Re: [PATCH] kvm: ppc: bookehv: Save restore SPRN_SPRG9 on guest entry > exit > > > On 16.07.14 07:49, Bharat Bhushan wrote: > > SPRN_SPRG is used by debug interrupt handler, so this is required for > > debug support. > > > > Signed-off-by: Bharat Bhushan <Bharat.Bhushan@xxxxxxxxxxxxx> > > --- > > arch/powerpc/include/asm/kvm_host.h | 1 + > > arch/powerpc/kernel/asm-offsets.c | 1 + > > arch/powerpc/kvm/bookehv_interrupts.S | 4 ++++ > > 3 files changed, 6 insertions(+) > > > > diff --git a/arch/powerpc/include/asm/kvm_host.h > > b/arch/powerpc/include/asm/kvm_host.h > > index 372b977..f9e94ed 100644 > > --- a/arch/powerpc/include/asm/kvm_host.h > > +++ b/arch/powerpc/include/asm/kvm_host.h > > @@ -588,6 +588,7 @@ struct kvm_vcpu_arch { > > u32 mmucfg; > > u32 eptcfg; > > u32 epr; > > + u32 sprg9; > > u32? really? Must be 64, even I did 64bit save/restore below. Will correct in next version. Thanks -Bharat > > > Alex > > > u32 pwrmgtcr0; > > u32 crit_save; > > /* guest debug registers*/ > > diff --git a/arch/powerpc/kernel/asm-offsets.c > > b/arch/powerpc/kernel/asm-offsets.c > > index 17ffcb4..ab9ae04 100644 > > --- a/arch/powerpc/kernel/asm-offsets.c > > +++ b/arch/powerpc/kernel/asm-offsets.c > > @@ -668,6 +668,7 @@ int main(void) > > DEFINE(VCPU_LR, offsetof(struct kvm_vcpu, arch.lr)); > > DEFINE(VCPU_CTR, offsetof(struct kvm_vcpu, arch.ctr)); > > DEFINE(VCPU_PC, offsetof(struct kvm_vcpu, arch.pc)); > > + DEFINE(VCPU_SPRG9, offsetof(struct kvm_vcpu, arch.sprg9)); > > DEFINE(VCPU_LAST_INST, offsetof(struct kvm_vcpu, arch.last_inst)); > > DEFINE(VCPU_FAULT_DEAR, offsetof(struct kvm_vcpu, arch.fault_dear)); > > DEFINE(VCPU_FAULT_ESR, offsetof(struct kvm_vcpu, arch.fault_esr)); > > diff --git a/arch/powerpc/kvm/bookehv_interrupts.S > > b/arch/powerpc/kvm/bookehv_interrupts.S > > index a1712b8..f45da85 100644 > > --- a/arch/powerpc/kvm/bookehv_interrupts.S > > +++ b/arch/powerpc/kvm/bookehv_interrupts.S > > @@ -441,6 +441,7 @@ _GLOBAL(kvmppc_resume_host) > > #ifdef CONFIG_64BIT > > PPC_LL r3, PACA_SPRG_VDSO(r13) > > #endif > > + mfspr r5, SPRN_SPRG9 > > PPC_STD(r6, VCPU_SHARED_SPRG4, r11) > > mfspr r8, SPRN_SPRG6 > > PPC_STD(r7, VCPU_SHARED_SPRG5, r11) @@ -448,6 +449,7 @@ > > _GLOBAL(kvmppc_resume_host) > > #ifdef CONFIG_64BIT > > mtspr SPRN_SPRG_VDSO_WRITE, r3 > > #endif > > + PPC_STD(r5, VCPU_SPRG9, r4) > > PPC_STD(r8, VCPU_SHARED_SPRG6, r11) > > mfxer r3 > > PPC_STD(r9, VCPU_SHARED_SPRG7, r11) @@ -682,7 +684,9 @@ > > lightweight_exit: > > mtspr SPRN_SPRG5W, r6 > > PPC_LD(r8, VCPU_SHARED_SPRG7, r11) > > mtspr SPRN_SPRG6W, r7 > > + PPC_LD(r5, VCPU_SPRG9, r4) > > mtspr SPRN_SPRG7W, r8 > > + mtspr SPRN_SPRG9, r5 > > > > /* Load some guest volatiles. */ > > PPC_LL r3, VCPU_LR(r4) -- 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
