On Sat, Nov 10, 2012 at 03:45:25PM +0000, Christoffer Dall wrote: > From: Marc Zyngier <marc.zyng...@arm.com> > > Enable the VGIC control interface to be save-restored on world switch. > > Signed-off-by: Marc Zyngier <marc.zyng...@arm.com> > Signed-off-by: Christoffer Dall <c.d...@virtualopensystems.com> > --- > arch/arm/include/asm/kvm_arm.h | 12 +++++++ > arch/arm/kernel/asm-offsets.c | 12 +++++++ > arch/arm/kvm/interrupts_head.S | 68 > ++++++++++++++++++++++++++++++++++++++++ > 3 files changed, 92 insertions(+) > > diff --git a/arch/arm/include/asm/kvm_arm.h b/arch/arm/include/asm/kvm_arm.h > index 246afd7..8f5dd22 100644 > --- a/arch/arm/include/asm/kvm_arm.h > +++ b/arch/arm/include/asm/kvm_arm.h > @@ -192,4 +192,16 @@ > #define HSR_EC_DABT (0x24) > #define HSR_EC_DABT_HYP (0x25) > > +/* GICH offsets */ > +#define GICH_HCR 0x0 > +#define GICH_VTR 0x4 > +#define GICH_VMCR 0x8 > +#define GICH_MISR 0x10 > +#define GICH_EISR0 0x20 > +#define GICH_EISR1 0x24 > +#define GICH_ELRSR0 0x30 > +#define GICH_ELRSR1 0x34 > +#define GICH_APR 0xf0 > +#define GICH_LR0 0x100
Similar thing to the other new gic defines -- they're probably better off in gic.h > + > #endif /* __ARM_KVM_ARM_H__ */ > diff --git a/arch/arm/kernel/asm-offsets.c b/arch/arm/kernel/asm-offsets.c > index 95cab37..39b6221 100644 > --- a/arch/arm/kernel/asm-offsets.c > +++ b/arch/arm/kernel/asm-offsets.c > @@ -167,6 +167,18 @@ int main(void) > DEFINE(VCPU_HxFAR, offsetof(struct kvm_vcpu, arch.hxfar)); > DEFINE(VCPU_HPFAR, offsetof(struct kvm_vcpu, arch.hpfar)); > DEFINE(VCPU_HYP_PC, offsetof(struct kvm_vcpu, arch.hyp_pc)); > +#ifdef CONFIG_KVM_ARM_VGIC > + DEFINE(VCPU_VGIC_CPU, offsetof(struct kvm_vcpu, > arch.vgic_cpu)); > + DEFINE(VGIC_CPU_HCR, offsetof(struct vgic_cpu, vgic_hcr)); > + DEFINE(VGIC_CPU_VMCR, offsetof(struct vgic_cpu, vgic_vmcr)); > + DEFINE(VGIC_CPU_MISR, offsetof(struct vgic_cpu, vgic_misr)); > + DEFINE(VGIC_CPU_EISR, offsetof(struct vgic_cpu, vgic_eisr)); > + DEFINE(VGIC_CPU_ELRSR, offsetof(struct vgic_cpu, vgic_elrsr)); > + DEFINE(VGIC_CPU_APR, offsetof(struct vgic_cpu, vgic_apr)); > + DEFINE(VGIC_CPU_LR, offsetof(struct vgic_cpu, vgic_lr)); > + DEFINE(VGIC_CPU_NR_LR, offsetof(struct vgic_cpu, nr_lr)); > + DEFINE(KVM_VGIC_VCTRL, offsetof(struct kvm, arch.vgic.vctrl_base)); > +#endif > DEFINE(KVM_VTTBR, offsetof(struct kvm, arch.vttbr)); > #endif > return 0; > diff --git a/arch/arm/kvm/interrupts_head.S b/arch/arm/kvm/interrupts_head.S > index 2ac8b4a..c2423d8 100644 > --- a/arch/arm/kvm/interrupts_head.S > +++ b/arch/arm/kvm/interrupts_head.S > @@ -341,6 +341,45 @@ > * @vcpup: Register pointing to VCPU struct > */ > .macro save_vgic_state vcpup > +#ifdef CONFIG_KVM_ARM_VGIC > + /* Get VGIC VCTRL base into r2 */ > + ldr r2, [\vcpup, #VCPU_KVM] > + ldr r2, [r2, #KVM_VGIC_VCTRL] > + cmp r2, #0 > + beq 2f > + > + /* Compute the address of struct vgic_cpu */ > + add r11, \vcpup, #VCPU_VGIC_CPU Given that we're dealing with constants, it would be more efficient to express this addition as part of the immediate offset and let gas spit out the final computed address for the stores below. > + > + /* Save all interesting registers */ > + ldr r3, [r2, #GICH_HCR] > + ldr r4, [r2, #GICH_VMCR] > + ldr r5, [r2, #GICH_MISR] > + ldr r6, [r2, #GICH_EISR0] > + ldr r7, [r2, #GICH_EISR1] > + ldr r8, [r2, #GICH_ELRSR0] > + ldr r9, [r2, #GICH_ELRSR1] > + ldr r10, [r2, #GICH_APR] > + > + str r3, [r11, #VGIC_CPU_HCR] > + str r4, [r11, #VGIC_CPU_VMCR] > + str r5, [r11, #VGIC_CPU_MISR] > + str r6, [r11, #VGIC_CPU_EISR] > + str r7, [r11, #(VGIC_CPU_EISR + 4)] > + str r8, [r11, #VGIC_CPU_ELRSR] > + str r9, [r11, #(VGIC_CPU_ELRSR + 4)] > + str r10, [r11, #VGIC_CPU_APR] > + > + /* Save list registers */ > + add r2, r2, #GICH_LR0 > + add r3, r11, #VGIC_CPU_LR > + ldr r4, [r11, #VGIC_CPU_NR_LR] > +1: ldr r6, [r2], #4 > + str r6, [r3], #4 > + subs r4, r4, #1 > + bne 1b > +2: > +#endif > .endm Will -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
