diff options
Diffstat (limited to 'arch/mips')
| -rw-r--r-- | arch/mips/include/asm/kvm_host.h | 7 | ||||
| -rw-r--r-- | arch/mips/kvm/emulate.c | 24 |
2 files changed, 19 insertions, 12 deletions
diff --git a/arch/mips/include/asm/kvm_host.h b/arch/mips/include/asm/kvm_host.h index 07f58cfc1ab9..bebec370324f 100644 --- a/arch/mips/include/asm/kvm_host.h +++ b/arch/mips/include/asm/kvm_host.h @@ -293,7 +293,10 @@ struct kvm_vcpu_arch { /* Host KSEG0 address of the EI/DI offset */ void *kseg0_commpage; - u32 io_gpr; /* GPR used as IO source/target */ + /* Resume PC after MMIO completion */ + unsigned long io_pc; + /* GPR used as IO source/target */ + u32 io_gpr; struct hrtimer comparecount_timer; /* Count timer control KVM register */ @@ -315,8 +318,6 @@ struct kvm_vcpu_arch { /* Bitmask of pending exceptions to be cleared */ unsigned long pending_exceptions_clr; - u32 pending_load_cause; - /* Save/Restore the entryhi register when are are preempted/scheduled back in */ unsigned long preempt_entryhi; diff --git a/arch/mips/kvm/emulate.c b/arch/mips/kvm/emulate.c index c45ef0f13dfa..aa0937423e28 100644 --- a/arch/mips/kvm/emulate.c +++ b/arch/mips/kvm/emulate.c @@ -1528,13 +1528,25 @@ enum emulation_result kvm_mips_emulate_load(union mips_instruction inst, struct kvm_vcpu *vcpu) { enum emulation_result er = EMULATE_DO_MMIO; + unsigned long curr_pc; u32 op, rt; u32 bytes; rt = inst.i_format.rt; op = inst.i_format.opcode; - vcpu->arch.pending_load_cause = cause; + /* + * Find the resume PC now while we have safe and easy access to the + * prior branch instruction, and save it for + * kvm_mips_complete_mmio_load() to restore later. + */ + curr_pc = vcpu->arch.pc; + er = update_pc(vcpu, cause); + if (er == EMULATE_FAIL) + return er; + vcpu->arch.io_pc = vcpu->arch.pc; + vcpu->arch.pc = curr_pc; + vcpu->arch.io_gpr = rt; switch (op) { @@ -2494,9 +2506,8 @@ enum emulation_result kvm_mips_complete_mmio_load(struct kvm_vcpu *vcpu, goto done; } - er = update_pc(vcpu, vcpu->arch.pending_load_cause); - if (er == EMULATE_FAIL) - return er; + /* Restore saved resume PC */ + vcpu->arch.pc = vcpu->arch.io_pc; switch (run->mmio.len) { case 4: @@ -2518,11 +2529,6 @@ enum emulation_result kvm_mips_complete_mmio_load(struct kvm_vcpu *vcpu, break; } - if (vcpu->arch.pending_load_cause & CAUSEF_BD) - kvm_debug("[%#lx] Completing %d byte BD Load to gpr %d (0x%08lx) type %d\n", - vcpu->arch.pc, run->mmio.len, vcpu->arch.io_gpr, *gpr, - vcpu->mmio_needed); - done: return er; } |