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Commit daf5e271 authored by Liu Yu's avatar Liu Yu Committed by Marcelo Tosatti
Browse files

KVM: ppc/booke: Set ESR and DEAR when inject interrupt to guest 



Old method prematurely sets ESR and DEAR.
Move this part after we decide to inject interrupt,
which is more like hardware behave.

Signed-off-by: default avatarLiu Yu <yu.liu@freescale.com>
Acked-by: default avatarHollis Blanchard <hollis@penguinppc.org>
Acked-by: default avatarAlexander Graf <agraf@suse.de>
Signed-off-by: default avatarAvi Kivity <avi@redhat.com>
parent 4b7bb921

arch/powerpc/include/asm/kvm_host.h

+2 −0
Original line number Diff line number Diff line
@@ -259,6 +259,8 @@ struct kvm_vcpu_arch { 
#endif

	ulong fault_dear;

	ulong fault_esr;

	ulong queued_dear;

	ulong queued_esr;

	gpa_t paddr_accessed;



	u8 io_gpr; /* GPR used as IO source/target */

arch/powerpc/kvm/booke.c

+44 −15
Original line number Diff line number Diff line
@@ -82,9 +82,32 @@ static void kvmppc_booke_queue_irqprio(struct kvm_vcpu *vcpu, 
	set_bit(priority, &vcpu->arch.pending_exceptions);

}



void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong flags)

static void kvmppc_core_queue_dtlb_miss(struct kvm_vcpu *vcpu,

                                        ulong dear_flags, ulong esr_flags)

{

	/* BookE does flags in ESR, so ignore those we get here */

	vcpu->arch.queued_dear = dear_flags;

	vcpu->arch.queued_esr = esr_flags;

	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DTLB_MISS);

}



static void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu,

                                           ulong dear_flags, ulong esr_flags)

{

	vcpu->arch.queued_dear = dear_flags;

	vcpu->arch.queued_esr = esr_flags;

	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DATA_STORAGE);

}



static void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu,

                                           ulong esr_flags)

{

	vcpu->arch.queued_esr = esr_flags;

	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_INST_STORAGE);

}



void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong esr_flags)

{

	vcpu->arch.queued_esr = esr_flags;

	kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_PROGRAM);

}
@@ -115,14 +138,19 @@ static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu, 
{

	int allowed = 0;

	ulong msr_mask;

	bool update_esr = false, update_dear = false;



	switch (priority) {

	case BOOKE_IRQPRIO_PROGRAM:

	case BOOKE_IRQPRIO_DTLB_MISS:

	case BOOKE_IRQPRIO_ITLB_MISS:

	case BOOKE_IRQPRIO_SYSCALL:

	case BOOKE_IRQPRIO_DATA_STORAGE:

		update_dear = true;

		/* fall through */

	case BOOKE_IRQPRIO_INST_STORAGE:

	case BOOKE_IRQPRIO_PROGRAM:

		update_esr = true;

		/* fall through */

	case BOOKE_IRQPRIO_ITLB_MISS:

	case BOOKE_IRQPRIO_SYSCALL:

	case BOOKE_IRQPRIO_FP_UNAVAIL:

	case BOOKE_IRQPRIO_SPE_UNAVAIL:

	case BOOKE_IRQPRIO_SPE_FP_DATA:
@@ -157,6 +185,10 @@ static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu, 
		vcpu->arch.srr0 = vcpu->arch.pc;

		vcpu->arch.srr1 = vcpu->arch.msr;

		vcpu->arch.pc = vcpu->arch.ivpr | vcpu->arch.ivor[priority];

		if (update_esr == true)

			vcpu->arch.esr = vcpu->arch.queued_esr;

		if (update_dear == true)

			vcpu->arch.dear = vcpu->arch.queued_dear;

		kvmppc_set_msr(vcpu, vcpu->arch.msr & msr_mask);



		clear_bit(priority, &vcpu->arch.pending_exceptions);
@@ -229,8 +261,7 @@ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu, 
		if (vcpu->arch.msr & MSR_PR) {

			/* Program traps generated by user-level software must be handled

			 * by the guest kernel. */

			vcpu->arch.esr = vcpu->arch.fault_esr;

			kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_PROGRAM);

			kvmppc_core_queue_program(vcpu, vcpu->arch.fault_esr);

			r = RESUME_GUEST;

			kvmppc_account_exit(vcpu, USR_PR_INST);

			break;
@@ -286,16 +317,14 @@ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu, 
		break;



	case BOOKE_INTERRUPT_DATA_STORAGE:

		vcpu->arch.dear = vcpu->arch.fault_dear;

		vcpu->arch.esr = vcpu->arch.fault_esr;

		kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DATA_STORAGE);

		kvmppc_core_queue_data_storage(vcpu, vcpu->arch.fault_dear,

		                               vcpu->arch.fault_esr);

		kvmppc_account_exit(vcpu, DSI_EXITS);

		r = RESUME_GUEST;

		break;



	case BOOKE_INTERRUPT_INST_STORAGE:

		vcpu->arch.esr = vcpu->arch.fault_esr;

		kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_INST_STORAGE);

		kvmppc_core_queue_inst_storage(vcpu, vcpu->arch.fault_esr);

		kvmppc_account_exit(vcpu, ISI_EXITS);

		r = RESUME_GUEST;

		break;
@@ -316,9 +345,9 @@ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu, 
		gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr);

		if (gtlb_index < 0) {

			/* The guest didn't have a mapping for it. */

			kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DTLB_MISS);

			vcpu->arch.dear = vcpu->arch.fault_dear;

			vcpu->arch.esr = vcpu->arch.fault_esr;

			kvmppc_core_queue_dtlb_miss(vcpu,

			                            vcpu->arch.fault_dear,

			                            vcpu->arch.fault_esr);

			kvmppc_mmu_dtlb_miss(vcpu);

			kvmppc_account_exit(vcpu, DTLB_REAL_MISS_EXITS);

			r = RESUME_GUEST;

arch/powerpc/kvm/emulate.c

+2 −2
Original line number Diff line number Diff line
@@ -151,10 +151,10 @@ int kvmppc_emulate_instruction(struct kvm_run *run, struct kvm_vcpu *vcpu) 
	case OP_TRAP:

#ifdef CONFIG_PPC64

	case OP_TRAP_64:

		kvmppc_core_queue_program(vcpu, SRR1_PROGTRAP);

#else

		vcpu->arch.esr |= ESR_PTR;

		kvmppc_core_queue_program(vcpu, vcpu->arch.esr | ESR_PTR);

#endif

		kvmppc_core_queue_program(vcpu, SRR1_PROGTRAP);

		advance = 0;

		break;