diff options
Diffstat (limited to 'arch/powerpc/kvm')
| -rw-r--r-- | arch/powerpc/kvm/book3s.c | 4 | ||||
| -rw-r--r-- | arch/powerpc/kvm/book3s_64_interrupts.S | 106 |
2 files changed, 57 insertions, 53 deletions
diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c index 492dcc1..fd2a4d5 100644 --- a/arch/powerpc/kvm/book3s.c +++ b/arch/powerpc/kvm/book3s.c @@ -539,8 +539,6 @@ int kvmppc_handle_pagefault(struct kvm_run *run, struct kvm_vcpu *vcpu, r = kvmppc_emulate_mmio(run, vcpu); if ( r == RESUME_HOST_NV ) r = RESUME_HOST; - if ( r == RESUME_GUEST_NV ) - r = RESUME_GUEST; } return r; @@ -645,7 +643,7 @@ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu, er = kvmppc_emulate_instruction(run, vcpu); switch (er) { case EMULATE_DONE: - r = RESUME_GUEST; + r = RESUME_GUEST_NV; break; case EMULATE_FAIL: printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n", diff --git a/arch/powerpc/kvm/book3s_64_interrupts.S b/arch/powerpc/kvm/book3s_64_interrupts.S index 7b55d80..d95d0d9 100644 --- a/arch/powerpc/kvm/book3s_64_interrupts.S +++ b/arch/powerpc/kvm/book3s_64_interrupts.S @@ -40,6 +40,26 @@ mtmsrd r0,1 .endm +#define VCPU_LOAD_NVGPRS(vcpu) \ + ld r14, VCPU_GPR(r14)(vcpu); \ + ld r15, VCPU_GPR(r15)(vcpu); \ + ld r16, VCPU_GPR(r16)(vcpu); \ + ld r17, VCPU_GPR(r17)(vcpu); \ + ld r18, VCPU_GPR(r18)(vcpu); \ + ld r19, VCPU_GPR(r19)(vcpu); \ + ld r20, VCPU_GPR(r20)(vcpu); \ + ld r21, VCPU_GPR(r21)(vcpu); \ + ld r22, VCPU_GPR(r22)(vcpu); \ + ld r23, VCPU_GPR(r23)(vcpu); \ + ld r24, VCPU_GPR(r24)(vcpu); \ + ld r25, VCPU_GPR(r25)(vcpu); \ + ld r26, VCPU_GPR(r26)(vcpu); \ + ld r27, VCPU_GPR(r27)(vcpu); \ + ld r28, VCPU_GPR(r28)(vcpu); \ + ld r29, VCPU_GPR(r29)(vcpu); \ + ld r30, VCPU_GPR(r30)(vcpu); \ + ld r31, VCPU_GPR(r31)(vcpu); \ + /***************************************************************************** * * * Guest entry / exit code that is in kernel module memory (highmem) * @@ -67,12 +87,16 @@ kvm_start_entry: SAVE_NVGPRS(r1) /* Save LR */ - mflr r14 - std r14, _LINK(r1) + std r0, _LINK(r1) + + /* Load non-volatile guest state from the vcpu */ + VCPU_LOAD_NVGPRS(r4) -/* XXX optimize non-volatile loading away */ kvm_start_lightweight: + ld r9, VCPU_PC(r4) /* r9 = vcpu->arch.pc */ + ld r10, VCPU_SHADOW_MSR(r4) /* r10 = vcpu->arch.shadow_msr */ + DISABLE_INTERRUPTS /* Save R1/R2 in the PACA */ @@ -81,29 +105,6 @@ kvm_start_lightweight: ld r3, VCPU_HIGHMEM_HANDLER(r4) std r3, PACASAVEDMSR(r13) - /* Load non-volatile guest state from the vcpu */ - ld r14, VCPU_GPR(r14)(r4) - ld r15, VCPU_GPR(r15)(r4) - ld r16, VCPU_GPR(r16)(r4) - ld r17, VCPU_GPR(r17)(r4) - ld r18, VCPU_GPR(r18)(r4) - ld r19, VCPU_GPR(r19)(r4) - ld r20, VCPU_GPR(r20)(r4) - ld r21, VCPU_GPR(r21)(r4) - ld r22, VCPU_GPR(r22)(r4) - ld r23, VCPU_GPR(r23)(r4) - ld r24, VCPU_GPR(r24)(r4) - ld r25, VCPU_GPR(r25)(r4) - ld r26, VCPU_GPR(r26)(r4) - ld r27, VCPU_GPR(r27)(r4) - ld r28, VCPU_GPR(r28)(r4) - ld r29, VCPU_GPR(r29)(r4) - ld r30, VCPU_GPR(r30)(r4) - ld r31, VCPU_GPR(r31)(r4) - - ld r9, VCPU_PC(r4) /* r9 = vcpu->arch.pc */ - ld r10, VCPU_SHADOW_MSR(r4) /* r10 = vcpu->arch.shadow_msr */ - ld r3, VCPU_TRAMPOLINE_ENTER(r4) mtsrr0 r3 @@ -247,7 +248,6 @@ kvmppc_handler_highmem: no_dcbz32_off: - /* XXX maybe skip on lightweight? */ std r14, VCPU_GPR(r14)(r12) std r15, VCPU_GPR(r15)(r12) std r16, VCPU_GPR(r16)(r12) @@ -267,9 +267,6 @@ no_dcbz32_off: std r30, VCPU_GPR(r30)(r12) std r31, VCPU_GPR(r31)(r12) - /* Restore non-volatile host registers (r14 - r31) */ - REST_NVGPRS(r1) - /* Save guest PC (R10) */ std r10, VCPU_PC(r12) @@ -351,42 +348,51 @@ kvm_return_point: /* Jump back to lightweight entry if we're supposed to */ /* go back into the guest */ + + /* Pass the exit number as 3rd argument to kvmppc_handle_exit */ mr r5, r3 + /* Restore r3 (kvm_run) and r4 (vcpu) */ REST_2GPRS(3, r1) bl KVMPPC_HANDLE_EXIT -#if 0 /* XXX get lightweight exits back */ + /* If RESUME_GUEST, get back in the loop */ cmpwi r3, RESUME_GUEST - bne kvm_exit_heavyweight + beq kvm_loop_lightweight - /* put VCPU and KVM_RUN back into place and roll again! */ - REST_2GPRS(3, r1) - b kvm_start_lightweight + cmpwi r3, RESUME_GUEST_NV + beq kvm_loop_heavyweight -kvm_exit_heavyweight: - /* Restore non-volatile host registers */ - ld r14, _LINK(r1) - mtlr r14 - REST_NVGPRS(r1) +kvm_exit_loop: - addi r1, r1, SWITCH_FRAME_SIZE -#else ld r4, _LINK(r1) mtlr r4 - cmpwi r3, RESUME_GUEST - bne kvm_exit_heavyweight + /* Restore non-volatile host registers (r14 - r31) */ + REST_NVGPRS(r1) + + addi r1, r1, SWITCH_FRAME_SIZE + blr + +kvm_loop_heavyweight: + ld r4, _LINK(r1) + std r4, (16 + SWITCH_FRAME_SIZE)(r1) + + /* Load vcpu and cpu_run */ REST_2GPRS(3, r1) - addi r1, r1, SWITCH_FRAME_SIZE + /* Load non-volatile guest state from the vcpu */ + VCPU_LOAD_NVGPRS(r4) - b kvm_start_entry + /* Jump back into the beginning of this function */ + b kvm_start_lightweight -kvm_exit_heavyweight: +kvm_loop_lightweight: - addi r1, r1, SWITCH_FRAME_SIZE -#endif + /* We'll need the vcpu pointer */ + REST_GPR(4, r1) + + /* Jump back into the beginning of this function */ + b kvm_start_lightweight - blr |