From f78146b0f9230765c6315b2e14f56112513389ad Mon Sep 17 00:00:00 2001 From: Avi Kivity Date: Wed, 18 Apr 2012 19:22:47 +0300 Subject: KVM: Fix page-crossing MMIO MMIO that are split across a page boundary are currently broken - the code does not expect to be aborted by the exit to userspace for the first MMIO fragment. This patch fixes the problem by generalizing the current code for handling 16-byte MMIOs to handle a number of "fragments", and changes the MMIO code to create those fragments. Signed-off-by: Avi Kivity Signed-off-by: Marcelo Tosatti --- arch/ia64/kvm/kvm-ia64.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) (limited to 'arch/ia64/kvm/kvm-ia64.c') diff --git a/arch/ia64/kvm/kvm-ia64.c b/arch/ia64/kvm/kvm-ia64.c index 9d80ff8d9eff..882ab21a8dcd 100644 --- a/arch/ia64/kvm/kvm-ia64.c +++ b/arch/ia64/kvm/kvm-ia64.c @@ -232,12 +232,12 @@ static int handle_mmio(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) if ((p->addr & PAGE_MASK) == IOAPIC_DEFAULT_BASE_ADDRESS) goto mmio; vcpu->mmio_needed = 1; - vcpu->mmio_phys_addr = kvm_run->mmio.phys_addr = p->addr; - vcpu->mmio_size = kvm_run->mmio.len = p->size; + vcpu->mmio_fragments[0].gpa = kvm_run->mmio.phys_addr = p->addr; + vcpu->mmio_fragments[0].len = kvm_run->mmio.len = p->size; vcpu->mmio_is_write = kvm_run->mmio.is_write = !p->dir; if (vcpu->mmio_is_write) - memcpy(vcpu->mmio_data, &p->data, p->size); + memcpy(vcpu->arch.mmio_data, &p->data, p->size); memcpy(kvm_run->mmio.data, &p->data, p->size); kvm_run->exit_reason = KVM_EXIT_MMIO; return 0; @@ -719,7 +719,7 @@ static void kvm_set_mmio_data(struct kvm_vcpu *vcpu) struct kvm_mmio_req *p = kvm_get_vcpu_ioreq(vcpu); if (!vcpu->mmio_is_write) - memcpy(&p->data, vcpu->mmio_data, 8); + memcpy(&p->data, vcpu->arch.mmio_data, 8); p->state = STATE_IORESP_READY; } @@ -739,7 +739,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) } if (vcpu->mmio_needed) { - memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8); + memcpy(vcpu->arch.mmio_data, kvm_run->mmio.data, 8); kvm_set_mmio_data(vcpu); vcpu->mmio_read_completed = 1; vcpu->mmio_needed = 0; -- cgit v1.2.3-58-ga151