> -----Original Message----- > From: kvm-ppc-ow...@vger.kernel.org [mailto:kvm-ppc-ow...@vger.kernel.org] On > Behalf Of Alexander Graf > Sent: Tuesday, August 07, 2012 4:16 PM > To: Bhushan Bharat-R65777 > Cc: kvm-ppc@vger.kernel.org; k...@vger.kernel.org; Bhushan Bharat-R65777 > Subject: Re: [PATCH 2/3] KVM: PPC: booke: Allow multiple exception types > > > On 03.08.2012, at 09:08, Bharat Bhushan wrote: > > > Current kvmppc_booke_handlers uses the same macro (KVM_HANDLER) and > > all handlers are considered to be the same size. This will not be > > the case if we want to use different macros for different handlers. > > > > This patch improves the kvmppc_booke_handler so that it can > > support different macros for different handlers. > > > > Signed-off-by: Liu Yu <yu....@freescale.com> > > [bharat.bhus...@freescale.com: Substantial changes] > > Signed-off-by: Bharat Bhushan <bharat.bhus...@freescale.com> > > --- > > arch/powerpc/include/asm/kvm_ppc.h | 2 - > > arch/powerpc/kvm/booke.c | 9 ++++--- > > arch/powerpc/kvm/booke.h | 1 + > > arch/powerpc/kvm/booke_interrupts.S | 37 > > ++++++++++++++++++++++++++++++++-- > > arch/powerpc/kvm/e500.c | 13 +++++++---- > > 5 files changed, 48 insertions(+), 14 deletions(-) > > > > diff --git a/arch/powerpc/include/asm/kvm_ppc.h > b/arch/powerpc/include/asm/kvm_ppc.h > > index 1438a5e..deb55bd 100644 > > --- a/arch/powerpc/include/asm/kvm_ppc.h > > +++ b/arch/powerpc/include/asm/kvm_ppc.h > > @@ -47,8 +47,6 @@ enum emulation_result { > > > > extern int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu); > > extern int __kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu > > *vcpu); > > -extern char kvmppc_handlers_start[]; > > -extern unsigned long kvmppc_handler_len; > > extern void kvmppc_handler_highmem(void); > > > > extern void kvmppc_dump_vcpu(struct kvm_vcpu *vcpu); > > diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c > > index aebbb8b..1338233 100644 > > --- a/arch/powerpc/kvm/booke.c > > +++ b/arch/powerpc/kvm/booke.c > > @@ -1541,6 +1541,7 @@ int __init kvmppc_booke_init(void) > > { > > #ifndef CONFIG_KVM_BOOKE_HV > > unsigned long ivor[16]; > > + unsigned long *handler = kvmppc_booke_handler_addr; > > unsigned long max_ivor = 0; > > int i; > > > > @@ -1574,14 +1575,14 @@ int __init kvmppc_booke_init(void) > > > > for (i = 0; i < 16; i++) { > > if (ivor[i] > max_ivor) > > - max_ivor = ivor[i]; > > + max_ivor = i; > > > > memcpy((void *)kvmppc_booke_handlers + ivor[i], > > - kvmppc_handlers_start + i * kvmppc_handler_len, > > - kvmppc_handler_len); > > + (void *)handler[i], handler[i + 1] - handler[i]); > > } > > flush_icache_range(kvmppc_booke_handlers, > > - kvmppc_booke_handlers + max_ivor + > > kvmppc_handler_len); > > + kvmppc_booke_handlers + ivor[max_ivor] + > > + handler[max_ivor + 1] - handler[max_ivor]); > > #endif /* !BOOKE_HV */ > > return 0; > > } > > diff --git a/arch/powerpc/kvm/booke.h b/arch/powerpc/kvm/booke.h > > index ba61974..de9e526 100644 > > --- a/arch/powerpc/kvm/booke.h > > +++ b/arch/powerpc/kvm/booke.h > > @@ -65,6 +65,7 @@ > > (1 << BOOKE_IRQPRIO_CRITICAL)) > > > > extern unsigned long kvmppc_booke_handlers; > > +extern unsigned long kvmppc_booke_handler_addr[]; > > > > void kvmppc_set_msr(struct kvm_vcpu *vcpu, u32 new_msr); > > void kvmppc_mmu_msr_notify(struct kvm_vcpu *vcpu, u32 old_msr); > > diff --git a/arch/powerpc/kvm/booke_interrupts.S > b/arch/powerpc/kvm/booke_interrupts.S > > index bb46b32..3539805 100644 > > --- a/arch/powerpc/kvm/booke_interrupts.S > > +++ b/arch/powerpc/kvm/booke_interrupts.S > > @@ -73,6 +73,14 @@ _GLOBAL(kvmppc_handler_\ivor_nr) > > bctr > > .endm > > > > +.macro KVM_HANDLER_ADDR ivor_nr > > + .long kvmppc_handler_\ivor_nr > > +.endm > > + > > +.macro KVM_HANDLER_END > > + .long kvmppc_handlers_end > > +.endm > > + > > _GLOBAL(kvmppc_handlers_start) > > KVM_HANDLER BOOKE_INTERRUPT_CRITICAL SPRN_SPRG_RSCRATCH_CRIT SPRN_CSRR0 > > KVM_HANDLER BOOKE_INTERRUPT_MACHINE_CHECK SPRN_SPRG_RSCRATCH_MC SPRN_MCSRR0 > > @@ -93,9 +101,7 @@ KVM_HANDLER BOOKE_INTERRUPT_DEBUG SPRN_SPRG_RSCRATCH_CRIT > SPRN_CSRR0 > > KVM_HANDLER BOOKE_INTERRUPT_SPE_UNAVAIL SPRN_SPRG_RSCRATCH0 SPRN_SRR0 > > KVM_HANDLER BOOKE_INTERRUPT_SPE_FP_DATA SPRN_SPRG_RSCRATCH0 SPRN_SRR0 > > KVM_HANDLER BOOKE_INTERRUPT_SPE_FP_ROUND SPRN_SPRG_RSCRATCH0 SPRN_SRR0 > > - > > -_GLOBAL(kvmppc_handler_len) > > - .long kvmppc_handler_1 - kvmppc_handler_0 > > +_GLOBAL(kvmppc_handlers_end) > > > > /* Registers: > > * SPRG_SCRATCH0: guest r4 > > @@ -463,6 +469,31 @@ lightweight_exit: > > lwz r4, VCPU_GPR(R4)(r4) > > rfi > > > > + .data > > + .align 4 > > + .globl kvmppc_booke_handler_addr > > +kvmppc_booke_handler_addr: > > +KVM_HANDLER_ADDR BOOKE_INTERRUPT_CRITICAL > > +KVM_HANDLER_ADDR BOOKE_INTERRUPT_MACHINE_CHECK > > +KVM_HANDLER_ADDR BOOKE_INTERRUPT_DATA_STORAGE > > +KVM_HANDLER_ADDR BOOKE_INTERRUPT_INST_STORAGE > > +KVM_HANDLER_ADDR BOOKE_INTERRUPT_EXTERNAL > > +KVM_HANDLER_ADDR BOOKE_INTERRUPT_ALIGNMENT > > +KVM_HANDLER_ADDR BOOKE_INTERRUPT_PROGRAM > > +KVM_HANDLER_ADDR BOOKE_INTERRUPT_FP_UNAVAIL > > +KVM_HANDLER_ADDR BOOKE_INTERRUPT_SYSCALL > > +KVM_HANDLER_ADDR BOOKE_INTERRUPT_AP_UNAVAIL > > +KVM_HANDLER_ADDR BOOKE_INTERRUPT_DECREMENTER > > +KVM_HANDLER_ADDR BOOKE_INTERRUPT_FIT > > +KVM_HANDLER_ADDR BOOKE_INTERRUPT_WATCHDOG > > +KVM_HANDLER_ADDR BOOKE_INTERRUPT_DTLB_MISS > > +KVM_HANDLER_ADDR BOOKE_INTERRUPT_ITLB_MISS > > +KVM_HANDLER_ADDR BOOKE_INTERRUPT_DEBUG > > +KVM_HANDLER_ADDR BOOKE_INTERRUPT_SPE_UNAVAIL > > +KVM_HANDLER_ADDR BOOKE_INTERRUPT_SPE_FP_DATA > > +KVM_HANDLER_ADDR BOOKE_INTERRUPT_SPE_FP_ROUND > > +KVM_HANDLER_END /*Always keep this in end*/ > > + > > #ifdef CONFIG_SPE > > _GLOBAL(kvmppc_save_guest_spe) > > cmpi 0,r3,0 > > diff --git a/arch/powerpc/kvm/e500.c b/arch/powerpc/kvm/e500.c > > index b479ed7..cb7a5e7 100644 > > --- a/arch/powerpc/kvm/e500.c > > +++ b/arch/powerpc/kvm/e500.c > > @@ -491,12 +491,15 @@ static int __init kvmppc_e500_init(void) > > { > > int r, i; > > unsigned long ivor[3]; > > + unsigned long *handler = kvmppc_booke_handler_addr; > > /* Process remaining handlers above the generic first 16 */ > unsigned long *handler = &kvmppc_booke_handler_addr[16]; > > > unsigned long max_ivor = 0; > > > > r = kvmppc_core_check_processor_compat(); > > if (r) > > return r; > > > > + handler += 16; > > + > > r = kvmppc_booke_init(); > > if (r) > > return r; > > @@ -506,15 +509,15 @@ static int __init kvmppc_e500_init(void) > > ivor[1] = mfspr(SPRN_IVOR33); > > ivor[2] = mfspr(SPRN_IVOR34); > > for (i = 0; i < 3; i++) { > > - if (ivor[i] > max_ivor) > > - max_ivor = ivor[i]; > > + if (ivor[i] > ivor[max_ivor]) > > + max_ivor = i; > > > > memcpy((void *)kvmppc_booke_handlers + ivor[i], > > - kvmppc_handlers_start + (i + 16) * kvmppc_handler_len, > > - kvmppc_handler_len); > > + (void *)handler[i], handler[i + 1] - handler[i]); > > handler_len = handler[i + 1] - handler[i]; > handler_end = max(handler_end, handler[i] + handler_len);
Ok . > > > } > > flush_icache_range(kvmppc_booke_handlers, > > - kvmppc_booke_handlers + max_ivor + kvmppc_handler_len); > > + kvmppc_booke_handlers + ivor[max_ivor] + > > + handler[max_ivor + 1] - handler[max_ivor]); > > handler_end I do not get how this logic will work and simple. Can you please explain ? The end address here is calculated by IVOR offset (same as host ivor offset) where KVM handler[last] is copied in kvmppc_booke_handlers and length by handler[last + 1] - handler[last]; Thanks -Bharat -- To unsubscribe from this list: send the line "unsubscribe kvm-ppc" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
