The subject could use a KVM: prefix.
On Mon, Nov 24, 2014 at 11:26:51PM +0200, Nikolay Nikolaev wrote: > On IO memory abort, try to handle the MMIO access thorugh the KVM > registered read/write callbacks. This is done by invoking the relevant > kvm_io_bus_* API. > > Signed-off-by: Nikolay Nikolaev <[email protected]> > --- > arch/arm/kvm/mmio.c | 33 +++++++++++++++++++++++++++++++++ > 1 file changed, 33 insertions(+) > > diff --git a/arch/arm/kvm/mmio.c b/arch/arm/kvm/mmio.c > index 4cb5a93..81230da 100644 > --- a/arch/arm/kvm/mmio.c > +++ b/arch/arm/kvm/mmio.c > @@ -162,6 +162,36 @@ static int decode_hsr(struct kvm_vcpu *vcpu, phys_addr_t > fault_ipa, > return 0; > } > > +/** > + * kvm_handle_mmio - handle an in-kernel MMIO access > + * @vcpu: pointer to the vcpu performing the access > + * @run: pointer to the kvm_run structure > + * @mmio: pointer to the data describing the access > + * > + * returns true if the MMIO access has been performed in kernel space, > + * and false if it needs to be emulated in user space. > + */ > +static bool handle_kernel_mmio(struct kvm_vcpu *vcpu, struct kvm_run *run, > + struct kvm_exit_mmio *mmio) > +{ > + int ret; > + > + if (mmio->is_write) { > + ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, mmio->phys_addr, > + mmio->len, &mmio->data); > + > + } else { > + ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, mmio->phys_addr, > + mmio->len, &mmio->data); > + } > + if (!ret) { > + kvm_prepare_mmio(run, mmio); > + kvm_handle_mmio_return(vcpu, run); > + } > + > + return !ret; > +} > + > int io_mem_abort(struct kvm_vcpu *vcpu, struct kvm_run *run, > phys_addr_t fault_ipa) > { > @@ -200,6 +230,9 @@ int io_mem_abort(struct kvm_vcpu *vcpu, struct kvm_run > *run, > if (vgic_handle_mmio(vcpu, run, &mmio)) > return 1; > > + if (handle_kernel_mmio(vcpu, run, &mmio)) > + return 1; > + > kvm_prepare_mmio(run, &mmio); > return 0; > } > -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
