[PATCH v3 1/5] KVM: Redesign kvm_io_bus_ API to pass VCPU structure to the callbacks.
Paolo Bonzini
pbonzini at redhat.com
Sat Jan 24 11:08:26 PST 2015
On 24/01/2015 12:59, Nikolay Nikolaev wrote:
> This is needed in e.g. ARM vGIC emulation, where the MMIO handling
> depends on the VCPU that does the access.
>
> Signed-off-by: Nikolay Nikolaev <n.nikolaev at virtualopensystems.com>
> ---
> arch/powerpc/kvm/mpic.c | 10 ++++++----
> arch/powerpc/kvm/powerpc.c | 4 ++--
> arch/s390/kvm/diag.c | 2 +-
> arch/x86/kvm/i8254.c | 14 +++++++++-----
> arch/x86/kvm/i8259.c | 12 ++++++------
> arch/x86/kvm/ioapic.c | 8 ++++----
> arch/x86/kvm/lapic.c | 4 ++--
> arch/x86/kvm/vmx.c | 2 +-
> arch/x86/kvm/x86.c | 13 +++++++------
> include/linux/kvm_host.h | 10 +++++-----
> virt/kvm/coalesced_mmio.c | 5 +++--
> virt/kvm/eventfd.c | 4 ++--
> virt/kvm/iodev.h | 23 +++++++++++++++--------
> virt/kvm/kvm_main.c | 32 ++++++++++++++++----------------
> 14 files changed, 79 insertions(+), 64 deletions(-)
>
> diff --git a/arch/powerpc/kvm/mpic.c b/arch/powerpc/kvm/mpic.c
> index 39b3a8f..8542f07 100644
> --- a/arch/powerpc/kvm/mpic.c
> +++ b/arch/powerpc/kvm/mpic.c
> @@ -1374,8 +1374,9 @@ static int kvm_mpic_write_internal(struct openpic *opp, gpa_t addr, u32 val)
> return -ENXIO;
> }
>
> -static int kvm_mpic_read(struct kvm_io_device *this, gpa_t addr,
> - int len, void *ptr)
> +static int kvm_mpic_read(struct kvm_vcpu *vcpu,
> + struct kvm_io_device *this,
> + gpa_t addr, int len, void *ptr)
> {
> struct openpic *opp = container_of(this, struct openpic, mmio);
> int ret;
> @@ -1415,8 +1416,9 @@ static int kvm_mpic_read(struct kvm_io_device *this, gpa_t addr,
> return ret;
> }
>
> -static int kvm_mpic_write(struct kvm_io_device *this, gpa_t addr,
> - int len, const void *ptr)
> +static int kvm_mpic_write(struct kvm_vcpu *vcpu,
> + struct kvm_io_device *this,
> + gpa_t addr, int len, const void *ptr)
> {
> struct openpic *opp = container_of(this, struct openpic, mmio);
> int ret;
> diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
> index c45eaab..0aac251 100644
> --- a/arch/powerpc/kvm/powerpc.c
> +++ b/arch/powerpc/kvm/powerpc.c
> @@ -808,7 +808,7 @@ int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
>
> idx = srcu_read_lock(&vcpu->kvm->srcu);
>
> - ret = kvm_io_bus_read(vcpu->kvm, KVM_MMIO_BUS, run->mmio.phys_addr,
> + ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
> bytes, &run->mmio.data);
>
> srcu_read_unlock(&vcpu->kvm->srcu, idx);
> @@ -881,7 +881,7 @@ int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
>
> idx = srcu_read_lock(&vcpu->kvm->srcu);
>
> - ret = kvm_io_bus_write(vcpu->kvm, KVM_MMIO_BUS, run->mmio.phys_addr,
> + ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
> bytes, &run->mmio.data);
>
> srcu_read_unlock(&vcpu->kvm->srcu, idx);
> diff --git a/arch/s390/kvm/diag.c b/arch/s390/kvm/diag.c
> index 9254aff..329ec75 100644
> --- a/arch/s390/kvm/diag.c
> +++ b/arch/s390/kvm/diag.c
> @@ -213,7 +213,7 @@ static int __diag_virtio_hypercall(struct kvm_vcpu *vcpu)
> * - gpr 3 contains the virtqueue index (passed as datamatch)
> * - gpr 4 contains the index on the bus (optionally)
> */
> - ret = kvm_io_bus_write_cookie(vcpu->kvm, KVM_VIRTIO_CCW_NOTIFY_BUS,
> + ret = kvm_io_bus_write_cookie(vcpu, KVM_VIRTIO_CCW_NOTIFY_BUS,
> vcpu->run->s.regs.gprs[2] & 0xffffffff,
> 8, &vcpu->run->s.regs.gprs[3],
> vcpu->run->s.regs.gprs[4]);
> diff --git a/arch/x86/kvm/i8254.c b/arch/x86/kvm/i8254.c
> index 298781d..4dce6f8 100644
> --- a/arch/x86/kvm/i8254.c
> +++ b/arch/x86/kvm/i8254.c
> @@ -443,7 +443,8 @@ static inline int pit_in_range(gpa_t addr)
> (addr < KVM_PIT_BASE_ADDRESS + KVM_PIT_MEM_LENGTH));
> }
>
> -static int pit_ioport_write(struct kvm_io_device *this,
> +static int pit_ioport_write(struct kvm_vcpu *vcpu,
> + struct kvm_io_device *this,
> gpa_t addr, int len, const void *data)
> {
> struct kvm_pit *pit = dev_to_pit(this);
> @@ -519,7 +520,8 @@ static int pit_ioport_write(struct kvm_io_device *this,
> return 0;
> }
>
> -static int pit_ioport_read(struct kvm_io_device *this,
> +static int pit_ioport_read(struct kvm_vcpu *vcpu,
> + struct kvm_io_device *this,
> gpa_t addr, int len, void *data)
> {
> struct kvm_pit *pit = dev_to_pit(this);
> @@ -589,7 +591,8 @@ static int pit_ioport_read(struct kvm_io_device *this,
> return 0;
> }
>
> -static int speaker_ioport_write(struct kvm_io_device *this,
> +static int speaker_ioport_write(struct kvm_vcpu *vcpu,
> + struct kvm_io_device *this,
> gpa_t addr, int len, const void *data)
> {
> struct kvm_pit *pit = speaker_to_pit(this);
> @@ -606,8 +609,9 @@ static int speaker_ioport_write(struct kvm_io_device *this,
> return 0;
> }
>
> -static int speaker_ioport_read(struct kvm_io_device *this,
> - gpa_t addr, int len, void *data)
> +static int speaker_ioport_read(struct kvm_vcpu *vcpu,
> + struct kvm_io_device *this,
> + gpa_t addr, int len, void *data)
> {
> struct kvm_pit *pit = speaker_to_pit(this);
> struct kvm_kpit_state *pit_state = &pit->pit_state;
> diff --git a/arch/x86/kvm/i8259.c b/arch/x86/kvm/i8259.c
> index cc31f7c..8ff4eaa 100644
> --- a/arch/x86/kvm/i8259.c
> +++ b/arch/x86/kvm/i8259.c
> @@ -528,42 +528,42 @@ static int picdev_read(struct kvm_pic *s,
> return 0;
> }
>
> -static int picdev_master_write(struct kvm_io_device *dev,
> +static int picdev_master_write(struct kvm_vcpu *vcpu, struct kvm_io_device *dev,
> gpa_t addr, int len, const void *val)
> {
> return picdev_write(container_of(dev, struct kvm_pic, dev_master),
> addr, len, val);
> }
>
> -static int picdev_master_read(struct kvm_io_device *dev,
> +static int picdev_master_read(struct kvm_vcpu *vcpu, struct kvm_io_device *dev,
> gpa_t addr, int len, void *val)
> {
> return picdev_read(container_of(dev, struct kvm_pic, dev_master),
> addr, len, val);
> }
>
> -static int picdev_slave_write(struct kvm_io_device *dev,
> +static int picdev_slave_write(struct kvm_vcpu *vcpu, struct kvm_io_device *dev,
> gpa_t addr, int len, const void *val)
> {
> return picdev_write(container_of(dev, struct kvm_pic, dev_slave),
> addr, len, val);
> }
>
> -static int picdev_slave_read(struct kvm_io_device *dev,
> +static int picdev_slave_read(struct kvm_vcpu *vcpu, struct kvm_io_device *dev,
> gpa_t addr, int len, void *val)
> {
> return picdev_read(container_of(dev, struct kvm_pic, dev_slave),
> addr, len, val);
> }
>
> -static int picdev_eclr_write(struct kvm_io_device *dev,
> +static int picdev_eclr_write(struct kvm_vcpu *vcpu, struct kvm_io_device *dev,
> gpa_t addr, int len, const void *val)
> {
> return picdev_write(container_of(dev, struct kvm_pic, dev_eclr),
> addr, len, val);
> }
>
> -static int picdev_eclr_read(struct kvm_io_device *dev,
> +static int picdev_eclr_read(struct kvm_vcpu *vcpu, struct kvm_io_device *dev,
> gpa_t addr, int len, void *val)
> {
> return picdev_read(container_of(dev, struct kvm_pic, dev_eclr),
> diff --git a/arch/x86/kvm/ioapic.c b/arch/x86/kvm/ioapic.c
> index b1947e0..8bf2e49 100644
> --- a/arch/x86/kvm/ioapic.c
> +++ b/arch/x86/kvm/ioapic.c
> @@ -498,8 +498,8 @@ static inline int ioapic_in_range(struct kvm_ioapic *ioapic, gpa_t addr)
> (addr < ioapic->base_address + IOAPIC_MEM_LENGTH)));
> }
>
> -static int ioapic_mmio_read(struct kvm_io_device *this, gpa_t addr, int len,
> - void *val)
> +static int ioapic_mmio_read(struct kvm_vcpu *vcpu, struct kvm_io_device *this,
> + gpa_t addr, int len, void *val)
> {
> struct kvm_ioapic *ioapic = to_ioapic(this);
> u32 result;
> @@ -541,8 +541,8 @@ static int ioapic_mmio_read(struct kvm_io_device *this, gpa_t addr, int len,
> return 0;
> }
>
> -static int ioapic_mmio_write(struct kvm_io_device *this, gpa_t addr, int len,
> - const void *val)
> +static int ioapic_mmio_write(struct kvm_vcpu *vcpu, struct kvm_io_device *this,
> + gpa_t addr, int len, const void *val)
> {
> struct kvm_ioapic *ioapic = to_ioapic(this);
> u32 data;
> diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
> index a688fbf..5e0ce37 100644
> --- a/arch/x86/kvm/lapic.c
> +++ b/arch/x86/kvm/lapic.c
> @@ -1043,7 +1043,7 @@ static int apic_mmio_in_range(struct kvm_lapic *apic, gpa_t addr)
> addr < apic->base_address + LAPIC_MMIO_LENGTH;
> }
>
> -static int apic_mmio_read(struct kvm_io_device *this,
> +static int apic_mmio_read(struct kvm_vcpu *vcpu, struct kvm_io_device *this,
> gpa_t address, int len, void *data)
> {
> struct kvm_lapic *apic = to_lapic(this);
> @@ -1363,7 +1363,7 @@ static int apic_reg_write(struct kvm_lapic *apic, u32 reg, u32 val)
> return ret;
> }
>
> -static int apic_mmio_write(struct kvm_io_device *this,
> +static int apic_mmio_write(struct kvm_vcpu *vcpu, struct kvm_io_device *this,
> gpa_t address, int len, const void *data)
> {
> struct kvm_lapic *apic = to_lapic(this);
> diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
> index ce35071..31f8d39 100644
> --- a/arch/x86/kvm/vmx.c
> +++ b/arch/x86/kvm/vmx.c
> @@ -5623,7 +5623,7 @@ static int handle_ept_misconfig(struct kvm_vcpu *vcpu)
> gpa_t gpa;
>
> gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS);
> - if (!kvm_io_bus_write(vcpu->kvm, KVM_FAST_MMIO_BUS, gpa, 0, NULL)) {
> + if (!kvm_io_bus_write(vcpu, KVM_FAST_MMIO_BUS, gpa, 0, NULL)) {
> skip_emulated_instruction(vcpu);
> return 1;
> }
> diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
> index 556dfb4..1f522b5 100644
> --- a/arch/x86/kvm/x86.c
> +++ b/arch/x86/kvm/x86.c
> @@ -4097,8 +4097,8 @@ static int vcpu_mmio_write(struct kvm_vcpu *vcpu, gpa_t addr, int len,
> do {
> n = min(len, 8);
> if (!(vcpu->arch.apic &&
> - !kvm_iodevice_write(&vcpu->arch.apic->dev, addr, n, v))
> - && kvm_io_bus_write(vcpu->kvm, KVM_MMIO_BUS, addr, n, v))
> + !kvm_iodevice_write(vcpu, &vcpu->arch.apic->dev, addr, n, v))
> + && kvm_io_bus_write(vcpu, KVM_MMIO_BUS, addr, n, v))
> break;
> handled += n;
> addr += n;
> @@ -4117,8 +4117,9 @@ static int vcpu_mmio_read(struct kvm_vcpu *vcpu, gpa_t addr, int len, void *v)
> do {
> n = min(len, 8);
> if (!(vcpu->arch.apic &&
> - !kvm_iodevice_read(&vcpu->arch.apic->dev, addr, n, v))
> - && kvm_io_bus_read(vcpu->kvm, KVM_MMIO_BUS, addr, n, v))
> + !kvm_iodevice_read(vcpu, &vcpu->arch.apic->dev,
> + addr, n, v))
> + && kvm_io_bus_read(vcpu, KVM_MMIO_BUS, addr, n, v))
> break;
> trace_kvm_mmio(KVM_TRACE_MMIO_READ, n, addr, *(u64 *)v);
> handled += n;
> @@ -4610,10 +4611,10 @@ static int kernel_pio(struct kvm_vcpu *vcpu, void *pd)
> int r;
>
> if (vcpu->arch.pio.in)
> - r = kvm_io_bus_read(vcpu->kvm, KVM_PIO_BUS, vcpu->arch.pio.port,
> + r = kvm_io_bus_read(vcpu, KVM_PIO_BUS, vcpu->arch.pio.port,
> vcpu->arch.pio.size, pd);
> else
> - r = kvm_io_bus_write(vcpu->kvm, KVM_PIO_BUS,
> + r = kvm_io_bus_write(vcpu, KVM_PIO_BUS,
> vcpu->arch.pio.port, vcpu->arch.pio.size,
> pd);
> return r;
> diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
> index 0ef2daa..fddaf0d 100644
> --- a/include/linux/kvm_host.h
> +++ b/include/linux/kvm_host.h
> @@ -169,12 +169,12 @@ enum kvm_bus {
> KVM_NR_BUSES
> };
>
> -int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
> +int kvm_io_bus_write(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx, gpa_t addr,
> int len, const void *val);
> -int kvm_io_bus_write_cookie(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
> - int len, const void *val, long cookie);
> -int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, int len,
> - void *val);
> +int kvm_io_bus_write_cookie(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx,
> + gpa_t addr, int len, const void *val, long cookie);
> +int kvm_io_bus_read(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx, gpa_t addr,
> + int len, void *val);
> int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
> int len, struct kvm_io_device *dev);
> int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
> diff --git a/virt/kvm/coalesced_mmio.c b/virt/kvm/coalesced_mmio.c
> index 00d8642..c831a40 100644
> --- a/virt/kvm/coalesced_mmio.c
> +++ b/virt/kvm/coalesced_mmio.c
> @@ -60,8 +60,9 @@ static int coalesced_mmio_has_room(struct kvm_coalesced_mmio_dev *dev)
> return 1;
> }
>
> -static int coalesced_mmio_write(struct kvm_io_device *this,
> - gpa_t addr, int len, const void *val)
> +static int coalesced_mmio_write(struct kvm_vcpu *vcpu,
> + struct kvm_io_device *this, gpa_t addr,
> + int len, const void *val)
> {
> struct kvm_coalesced_mmio_dev *dev = to_mmio(this);
> struct kvm_coalesced_mmio_ring *ring = dev->kvm->coalesced_mmio_ring;
> diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c
> index 148b239..99994c8 100644
> --- a/virt/kvm/eventfd.c
> +++ b/virt/kvm/eventfd.c
> @@ -712,8 +712,8 @@ ioeventfd_in_range(struct _ioeventfd *p, gpa_t addr, int len, const void *val)
>
> /* MMIO/PIO writes trigger an event if the addr/val match */
> static int
> -ioeventfd_write(struct kvm_io_device *this, gpa_t addr, int len,
> - const void *val)
> +ioeventfd_write(struct kvm_vcpu *vcpu, struct kvm_io_device *this, gpa_t addr,
> + int len, const void *val)
> {
> struct _ioeventfd *p = to_ioeventfd(this);
>
> diff --git a/virt/kvm/iodev.h b/virt/kvm/iodev.h
> index 12fd3ca..9ef709c 100644
> --- a/virt/kvm/iodev.h
> +++ b/virt/kvm/iodev.h
> @@ -20,6 +20,7 @@
> #include <asm/errno.h>
>
> struct kvm_io_device;
> +struct kvm_vcpu;
>
> /**
> * kvm_io_device_ops are called under kvm slots_lock.
> @@ -27,11 +28,13 @@ struct kvm_io_device;
> * or non-zero to have it passed to the next device.
> **/
> struct kvm_io_device_ops {
> - int (*read)(struct kvm_io_device *this,
> + int (*read)(struct kvm_vcpu *vcpu,
> + struct kvm_io_device *this,
> gpa_t addr,
> int len,
> void *val);
> - int (*write)(struct kvm_io_device *this,
> + int (*write)(struct kvm_vcpu *vcpu,
> + struct kvm_io_device *this,
> gpa_t addr,
> int len,
> const void *val);
> @@ -49,16 +52,20 @@ static inline void kvm_iodevice_init(struct kvm_io_device *dev,
> dev->ops = ops;
> }
>
> -static inline int kvm_iodevice_read(struct kvm_io_device *dev,
> - gpa_t addr, int l, void *v)
> +static inline int kvm_iodevice_read(struct kvm_vcpu *vcpu,
> + struct kvm_io_device *dev, gpa_t addr,
> + int l, void *v)
> {
> - return dev->ops->read ? dev->ops->read(dev, addr, l, v) : -EOPNOTSUPP;
> + return dev->ops->read ? dev->ops->read(vcpu, dev, addr, l, v)
> + : -EOPNOTSUPP;
> }
>
> -static inline int kvm_iodevice_write(struct kvm_io_device *dev,
> - gpa_t addr, int l, const void *v)
> +static inline int kvm_iodevice_write(struct kvm_vcpu *vcpu,
> + struct kvm_io_device *dev, gpa_t addr,
> + int l, const void *v)
> {
> - return dev->ops->write ? dev->ops->write(dev, addr, l, v) : -EOPNOTSUPP;
> + return dev->ops->write ? dev->ops->write(vcpu, dev, addr, l, v)
> + : -EOPNOTSUPP;
> }
>
> static inline void kvm_iodevice_destructor(struct kvm_io_device *dev)
> diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
> index 246cf29..60856d3 100644
> --- a/virt/kvm/kvm_main.c
> +++ b/virt/kvm/kvm_main.c
> @@ -3004,7 +3004,7 @@ static int kvm_io_bus_get_first_dev(struct kvm_io_bus *bus,
> return off;
> }
>
> -static int __kvm_io_bus_write(struct kvm_io_bus *bus,
> +static int __kvm_io_bus_write(struct kvm_vcpu *vcpu, struct kvm_io_bus *bus,
> struct kvm_io_range *range, const void *val)
> {
> int idx;
> @@ -3015,7 +3015,7 @@ static int __kvm_io_bus_write(struct kvm_io_bus *bus,
>
> while (idx < bus->dev_count &&
> kvm_io_bus_cmp(range, &bus->range[idx]) == 0) {
> - if (!kvm_iodevice_write(bus->range[idx].dev, range->addr,
> + if (!kvm_iodevice_write(vcpu, bus->range[idx].dev, range->addr,
> range->len, val))
> return idx;
> idx++;
> @@ -3025,7 +3025,7 @@ static int __kvm_io_bus_write(struct kvm_io_bus *bus,
> }
>
> /* kvm_io_bus_write - called under kvm->slots_lock */
> -int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
> +int kvm_io_bus_write(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx, gpa_t addr,
> int len, const void *val)
> {
> struct kvm_io_bus *bus;
> @@ -3037,14 +3037,14 @@ int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
> .len = len,
> };
>
> - bus = srcu_dereference(kvm->buses[bus_idx], &kvm->srcu);
> - r = __kvm_io_bus_write(bus, &range, val);
> + bus = srcu_dereference(vcpu->kvm->buses[bus_idx], &kvm->srcu);
> + r = __kvm_io_bus_write(vcpu, bus, &range, val);
> return r < 0 ? r : 0;
> }
>
> /* kvm_io_bus_write_cookie - called under kvm->slots_lock */
> -int kvm_io_bus_write_cookie(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
> - int len, const void *val, long cookie)
> +int kvm_io_bus_write_cookie(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx,
> + gpa_t addr, int len, const void *val, long cookie)
> {
> struct kvm_io_bus *bus;
> struct kvm_io_range range;
> @@ -3054,12 +3054,12 @@ int kvm_io_bus_write_cookie(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
> .len = len,
> };
>
> - bus = srcu_dereference(kvm->buses[bus_idx], &kvm->srcu);
> + bus = srcu_dereference(vcpu->kvm->buses[bus_idx], &kvm->srcu);
>
> /* First try the device referenced by cookie. */
> if ((cookie >= 0) && (cookie < bus->dev_count) &&
> (kvm_io_bus_cmp(&range, &bus->range[cookie]) == 0))
> - if (!kvm_iodevice_write(bus->range[cookie].dev, addr, len,
> + if (!kvm_iodevice_write(vcpu, bus->range[cookie].dev, addr, len,
> val))
> return cookie;
>
> @@ -3067,11 +3067,11 @@ int kvm_io_bus_write_cookie(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
> * cookie contained garbage; fall back to search and return the
> * correct cookie value.
> */
> - return __kvm_io_bus_write(bus, &range, val);
> + return __kvm_io_bus_write(vcpu, bus, &range, val);
> }
>
> -static int __kvm_io_bus_read(struct kvm_io_bus *bus, struct kvm_io_range *range,
> - void *val)
> +static int __kvm_io_bus_read(struct kvm_vcpu *vcpu, struct kvm_io_bus *bus,
> + struct kvm_io_range *range, void *val)
> {
> int idx;
>
> @@ -3081,7 +3081,7 @@ static int __kvm_io_bus_read(struct kvm_io_bus *bus, struct kvm_io_range *range,
>
> while (idx < bus->dev_count &&
> kvm_io_bus_cmp(range, &bus->range[idx]) == 0) {
> - if (!kvm_iodevice_read(bus->range[idx].dev, range->addr,
> + if (!kvm_iodevice_read(vcpu, bus->range[idx].dev, range->addr,
> range->len, val))
> return idx;
> idx++;
> @@ -3092,7 +3092,7 @@ static int __kvm_io_bus_read(struct kvm_io_bus *bus, struct kvm_io_range *range,
> EXPORT_SYMBOL_GPL(kvm_io_bus_write);
>
> /* kvm_io_bus_read - called under kvm->slots_lock */
> -int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
> +int kvm_io_bus_read(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx, gpa_t addr,
> int len, void *val)
> {
> struct kvm_io_bus *bus;
> @@ -3104,8 +3104,8 @@ int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
> .len = len,
> };
>
> - bus = srcu_dereference(kvm->buses[bus_idx], &kvm->srcu);
> - r = __kvm_io_bus_read(bus, &range, val);
> + bus = srcu_dereference(vcpu->kvm->buses[bus_idx], &kvm->srcu);
> + r = __kvm_io_bus_read(vcpu, bus, &range, val);
> return r < 0 ? r : 0;
> }
>
Acked-by: Paolo Bonzini <pbonzini at redhat.com>
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