So that we don't give any chance for host to trigger the debug event. Also the debug ability in guest can be implemented based on this. Signed-off-by: Liu Yu <yu.liu@xxxxxxxxxxxxx> --- arch/powerpc/kernel/asm-offsets.c | 3 ++ arch/powerpc/kvm/booke_interrupts.S | 58 +++++++++++++++++++++++++++++++++++ 2 files changed, 61 insertions(+), 0 deletions(-) diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c index 561b646..643ee15 100644 --- a/arch/powerpc/kernel/asm-offsets.c +++ b/arch/powerpc/kernel/asm-offsets.c @@ -379,6 +379,9 @@ int main(void) 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)); + DEFINE(VCPU_SHADOW_DBG, offsetof(struct kvm_vcpu, arch.shadow_dbg_reg)); + DEFINE(VCPU_HOST_DBG, offsetof(struct kvm_vcpu, arch.host_dbg_reg)); + DEFINE(VCPU_GUEST_DEBUG, offsetof(struct kvm_vcpu, guest_debug)); #endif #ifdef CONFIG_44x DEFINE(PGD_T_LOG2, PGD_T_LOG2); diff --git a/arch/powerpc/kvm/booke_interrupts.S b/arch/powerpc/kvm/booke_interrupts.S index d0c6f84..52592fe 100644 --- a/arch/powerpc/kvm/booke_interrupts.S +++ b/arch/powerpc/kvm/booke_interrupts.S @@ -168,6 +168,26 @@ _GLOBAL(kvmppc_resume_host) stw r9, VCPU_FAULT_ESR(r4) ..skip_esr: + lwz r6, VCPU_GUEST_DEBUG(r4) + or. r6, r6, r6 + beq ..skip_host_debug + addi r7, r4, VCPU_HOST_DBG - 4 + lwzu r9, 4(r7) + mtspr SPRN_DBCR0, r9 + lwzu r9, 4(r7) + mtspr SPRN_IAC1, r9 + lwzu r9, 4(r7) + mtspr SPRN_IAC2, r9 + lwzu r9, 4(r7) + mtspr SPRN_IAC3, r9 + lwzu r9, 4(r7) + mtspr SPRN_IAC4, r9 + lwzu r9, 4(r7) + mtspr SPRN_DAC1, r9 + lwzu r9, 4(r7) + mtspr SPRN_DAC2, r9 +..skip_host_debug: + /* Save remaining volatile guest register state to vcpu. */ stw r0, VCPU_GPR(r0)(r4) stw r1, VCPU_GPR(r1)(r4) @@ -392,6 +412,44 @@ lightweight_exit: lwz r3, VCPU_SPRG7(r4) mtspr SPRN_SPRG7, r3 + lwz r6, VCPU_GUEST_DEBUG(r4) + or. r6, r6, r6 + beq ..skip_guest_debug + mfmsr r7 + rlwinm r7, r7, 0, ~MSR_DE + mtmsr r7 + addi r7, r4, VCPU_HOST_DBG - 4 + mfspr r8, SPRN_DBCR0 + stwu r8, 4(r7) + mfspr r8, SPRN_IAC1 + stwu r8, 4(r7) + mfspr r8, SPRN_IAC2 + stwu r8, 4(r7) + mfspr r8, SPRN_IAC3 + stwu r8, 4(r7) + mfspr r8, SPRN_IAC4 + stwu r8, 4(r7) + mfspr r8, SPRN_DAC1 + stwu r8, 4(r7) + mfspr r8, SPRN_DAC2 + stwu r8, 4(r7) + addi r7, r4, VCPU_SHADOW_DBG - 4 + lwzu r8, 4(r7) + mtspr SPRN_DBCR0, r8 + lwzu r8, 4(r7) + mtspr SPRN_IAC1, r8 + lwzu r8, 4(r7) + mtspr SPRN_IAC2, r8 + lwzu r8, 4(r7) + mtspr SPRN_IAC3, r8 + lwzu r8, 4(r7) + mtspr SPRN_IAC4, r8 + lwzu r8, 4(r7) + mtspr SPRN_DAC1, r8 + lwzu r8, 4(r7) + mtspr SPRN_DAC2, r8 +..skip_guest_debug: + #ifdef CONFIG_KVM_EXIT_TIMING /* save enter time */ 1: -- 1.5.4 -- To unsubscribe from this list: send the line "unsubscribe kvm-ppc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
