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Commit 0e673fb6 authored by Alexander Graf's avatar Alexander Graf
Browse files

KVM: PPC: Support eventfd 



In order to support the generic eventfd infrastructure on PPC, we need
to call into the generic KVM in-kernel device mmio code.

Signed-off-by: default avatarAlexander Graf <agraf@suse.de>
parent 914daba8

arch/powerpc/kvm/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -20,6 +20,7 @@ config KVM 
	bool

	select PREEMPT_NOTIFIERS

	select ANON_INODES

	select HAVE_KVM_EVENTFD



config KVM_BOOK3S_HANDLER

	bool

arch/powerpc/kvm/Makefile

+3 −1
Original line number Diff line number Diff line
@@ -6,7 +6,8 @@ subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror 


ccflags-y := -Ivirt/kvm -Iarch/powerpc/kvm



common-objs-y = $(addprefix ../../../virt/kvm/, kvm_main.o coalesced_mmio.o)

common-objs-y = $(addprefix ../../../virt/kvm/, kvm_main.o coalesced_mmio.o \

						eventfd.o)



CFLAGS_44x_tlb.o  := -I.

CFLAGS_e500_tlb.o := -I.
@@ -76,6 +77,7 @@ kvm-book3s_64-builtin-objs-$(CONFIG_KVM_BOOK3S_64_HV) := \ 


kvm-book3s_64-module-objs := \

	../../../virt/kvm/kvm_main.o \

	../../../virt/kvm/eventfd.o \

	powerpc.o \

	emulate.o \

	book3s.o \

arch/powerpc/kvm/powerpc.c

+16 −1
Original line number Diff line number Diff line
@@ -314,6 +314,7 @@ int kvm_dev_ioctl_check_extension(long ext) 
	case KVM_CAP_PPC_IRQ_LEVEL:

	case KVM_CAP_ENABLE_CAP:

	case KVM_CAP_ONE_REG:

	case KVM_CAP_IOEVENTFD:

		r = 1;

		break;

#ifndef CONFIG_KVM_BOOK3S_64_HV
@@ -618,6 +619,13 @@ int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu, 
	vcpu->mmio_is_write = 0;

	vcpu->arch.mmio_sign_extend = 0;



	if (!kvm_io_bus_read(vcpu->kvm, KVM_MMIO_BUS, run->mmio.phys_addr,

			     bytes, &run->mmio.data)) {

		kvmppc_complete_mmio_load(vcpu, run);

		vcpu->mmio_needed = 0;

		return EMULATE_DONE;

	}



	return EMULATE_DO_MMIO;

}
@@ -627,8 +635,8 @@ int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu, 
{

	int r;



	r = kvmppc_handle_load(run, vcpu, rt, bytes, is_bigendian);

	vcpu->arch.mmio_sign_extend = 1;

	r = kvmppc_handle_load(run, vcpu, rt, bytes, is_bigendian);



	return r;

}
@@ -666,6 +674,13 @@ int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu, 
		}

	}



	if (!kvm_io_bus_write(vcpu->kvm, KVM_MMIO_BUS, run->mmio.phys_addr,

			      bytes, &run->mmio.data)) {

		kvmppc_complete_mmio_load(vcpu, run);

		vcpu->mmio_needed = 0;

		return EMULATE_DONE;

	}



	return EMULATE_DO_MMIO;

}