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Commit 83215812 authored by Andre Przywara's avatar Andre Przywara Committed by Christoffer Dall
Browse files

arm/arm64: KVM: add vgic.h header file 



vgic.c is currently a mixture of generic vGIC emulation code and
functions specific to emulating a GICv2. To ease the addition of
GICv3 later, we create new header file vgic.h, which holds constants
and prototypes of commonly used functions.
Rename some identifiers to avoid name space clutter.
I removed the long-standing comment about using the kvm_io_bus API
to tackle the GIC register ranges, as it wouldn't be a win for us
anymore.

Signed-off-by: default avatarAndre Przywara <andre.przywara@arm.com>
Acked-by: default avatarChristoffer Dall <christoffer.dall@linaro.org>

-------
As the diff isn't always obvious here (and to aid eventual rebases),
here is a list of high-level changes done to the code:
* moved definitions and prototypes from vgic.c to vgic.h:
  - VGIC_ADDR_UNDEF
  - ACCESS_{READ,WRITE}_*
  - vgic_init()
  - vgic_update_state()
  - vgic_kick_vcpus()
  - vgic_get_vmcr()
  - vgic_set_vmcr()
  - struct mmio_range {} (renamed to struct kvm_mmio_range)
* removed static keyword and exported prototype in vgic.h:
  - vgic_bitmap_get_reg()
  - vgic_bitmap_set_irq_val()
  - vgic_bitmap_get_shared_map()
  - vgic_bytemap_get_reg()
  - vgic_dist_irq_set_pending()
  - vgic_dist_irq_clear_pending()
  - vgic_cpu_irq_clear()
  - vgic_reg_access()
  - handle_mmio_raz_wi()
  - vgic_handle_enable_reg()
  - vgic_handle_set_pending_reg()
  - vgic_handle_clear_pending_reg()
  - vgic_handle_cfg_reg()
  - vgic_unqueue_irqs()
  - find_matching_range() (renamed to vgic_find_range)
  - vgic_handle_mmio_range()
  - vgic_update_state()
  - vgic_get_vmcr()
  - vgic_set_vmcr()
  - vgic_queue_irq()
  - vgic_kick_vcpus()
  - vgic_init()
  - vgic_v2_init_emulation()
  - vgic_has_attr_regs()
  - vgic_set_common_attr()
  - vgic_get_common_attr()
  - vgic_destroy()
  - vgic_create()
* moved functions to vgic.h (static inline):
  - mmio_data_read()
  - mmio_data_write()
  - is_in_range()

Signed-off-by: default avatarChristoffer Dall <christoffer.dall@linaro.org>
parent b60da146

virt/kvm/arm/vgic.c

+50 −101
Original line number Diff line number Diff line
@@ -75,33 +75,16 @@ 
 *   inactive as long as the external input line is held high.

 */



#define VGIC_ADDR_UNDEF		(-1)

#define IS_VGIC_ADDR_UNDEF(_x)  ((_x) == VGIC_ADDR_UNDEF)

#include "vgic.h"



#define PRODUCT_ID_KVM		0x4b	/* ASCII code K */

#define IMPLEMENTER_ARM		0x43b

#define GICC_ARCH_VERSION_V2	0x2



#define ACCESS_READ_VALUE	(1 << 0)

#define ACCESS_READ_RAZ		(0 << 0)

#define ACCESS_READ_MASK(x)	((x) & (1 << 0))

#define ACCESS_WRITE_IGNORED	(0 << 1)

#define ACCESS_WRITE_SETBIT	(1 << 1)

#define ACCESS_WRITE_CLEARBIT	(2 << 1)

#define ACCESS_WRITE_VALUE	(3 << 1)

#define ACCESS_WRITE_MASK(x)	((x) & (3 << 1))



static int vgic_init(struct kvm *kvm);

static void vgic_retire_disabled_irqs(struct kvm_vcpu *vcpu);

static void vgic_retire_lr(int lr_nr, int irq, struct kvm_vcpu *vcpu);

static void vgic_update_state(struct kvm *kvm);

static void vgic_kick_vcpus(struct kvm *kvm);

static u8 *vgic_get_sgi_sources(struct vgic_dist *dist, int vcpu_id, int sgi);

static void vgic_dispatch_sgi(struct kvm_vcpu *vcpu, u32 reg);

static struct vgic_lr vgic_get_lr(const struct kvm_vcpu *vcpu, int lr);

static void vgic_set_lr(struct kvm_vcpu *vcpu, int lr, struct vgic_lr lr_desc);

static void vgic_get_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);

static void vgic_set_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);



static const struct vgic_ops *vgic_ops;

static const struct vgic_params *vgic;
@@ -175,8 +158,7 @@ static unsigned long *u64_to_bitmask(u64 *val) 
	return (unsigned long *)val;

}



static u32 *vgic_bitmap_get_reg(struct vgic_bitmap *x,

				int cpuid, u32 offset)

u32 *vgic_bitmap_get_reg(struct vgic_bitmap *x, int cpuid, u32 offset)

{

	offset >>= 2;

	if (!offset)
@@ -194,7 +176,7 @@ static int vgic_bitmap_get_irq_val(struct vgic_bitmap *x, 
	return test_bit(irq - VGIC_NR_PRIVATE_IRQS, x->shared);

}



static void vgic_bitmap_set_irq_val(struct vgic_bitmap *x, int cpuid,

void vgic_bitmap_set_irq_val(struct vgic_bitmap *x, int cpuid,

			     int irq, int val)

{

	unsigned long *reg;
@@ -217,7 +199,7 @@ static unsigned long *vgic_bitmap_get_cpu_map(struct vgic_bitmap *x, int cpuid) 
	return x->private + cpuid;

}



static unsigned long *vgic_bitmap_get_shared_map(struct vgic_bitmap *x)

unsigned long *vgic_bitmap_get_shared_map(struct vgic_bitmap *x)

{

	return x->shared;

}
@@ -244,7 +226,7 @@ static void vgic_free_bytemap(struct vgic_bytemap *b) 
	b->shared = NULL;

}



static u32 *vgic_bytemap_get_reg(struct vgic_bytemap *x, int cpuid, u32 offset)

u32 *vgic_bytemap_get_reg(struct vgic_bytemap *x, int cpuid, u32 offset)

{

	u32 *reg;
@@ -341,14 +323,14 @@ static int vgic_dist_irq_is_pending(struct kvm_vcpu *vcpu, int irq) 
	return vgic_bitmap_get_irq_val(&dist->irq_pending, vcpu->vcpu_id, irq);

}



static void vgic_dist_irq_set_pending(struct kvm_vcpu *vcpu, int irq)

void vgic_dist_irq_set_pending(struct kvm_vcpu *vcpu, int irq)

{

	struct vgic_dist *dist = &vcpu->kvm->arch.vgic;



	vgic_bitmap_set_irq_val(&dist->irq_pending, vcpu->vcpu_id, irq, 1);

}



static void vgic_dist_irq_clear_pending(struct kvm_vcpu *vcpu, int irq)

void vgic_dist_irq_clear_pending(struct kvm_vcpu *vcpu, int irq)

{

	struct vgic_dist *dist = &vcpu->kvm->arch.vgic;
@@ -364,7 +346,7 @@ static void vgic_cpu_irq_set(struct kvm_vcpu *vcpu, int irq) 
			vcpu->arch.vgic_cpu.pending_shared);

}



static void vgic_cpu_irq_clear(struct kvm_vcpu *vcpu, int irq)

void vgic_cpu_irq_clear(struct kvm_vcpu *vcpu, int irq)

{

	if (irq < VGIC_NR_PRIVATE_IRQS)

		clear_bit(irq, vcpu->arch.vgic_cpu.pending_percpu);
@@ -378,16 +360,6 @@ static bool vgic_can_sample_irq(struct kvm_vcpu *vcpu, int irq) 
	return vgic_irq_is_edge(vcpu, irq) || !vgic_irq_is_queued(vcpu, irq);

}



static u32 mmio_data_read(struct kvm_exit_mmio *mmio, u32 mask)

{

	return le32_to_cpu(*((u32 *)mmio->data)) & mask;

}



static void mmio_data_write(struct kvm_exit_mmio *mmio, u32 mask, u32 value)

{

	*((u32 *)mmio->data) = cpu_to_le32(value) & mask;

}



/**

 * vgic_reg_access - access vgic register

 * @mmio:   pointer to the data describing the mmio access
@@ -399,7 +371,7 @@ static void mmio_data_write(struct kvm_exit_mmio *mmio, u32 mask, u32 value) 
 * modes defined for vgic register access

 * (read,raz,write-ignored,setbit,clearbit,write)

 */

static void vgic_reg_access(struct kvm_exit_mmio *mmio, u32 *reg,

void vgic_reg_access(struct kvm_exit_mmio *mmio, u32 *reg,

		     phys_addr_t offset, int mode)

{

	int word_offset = (offset & 3) * 8;
@@ -484,15 +456,15 @@ static bool handle_mmio_misc(struct kvm_vcpu *vcpu, 
	return false;

}



static bool handle_mmio_raz_wi(struct kvm_vcpu *vcpu,

			       struct kvm_exit_mmio *mmio, phys_addr_t offset)

bool handle_mmio_raz_wi(struct kvm_vcpu *vcpu, struct kvm_exit_mmio *mmio,

			phys_addr_t offset)

{

	vgic_reg_access(mmio, NULL, offset,

			ACCESS_READ_RAZ | ACCESS_WRITE_IGNORED);

	return false;

}



static bool vgic_handle_enable_reg(struct kvm *kvm, struct kvm_exit_mmio *mmio,

bool vgic_handle_enable_reg(struct kvm *kvm, struct kvm_exit_mmio *mmio,

			    phys_addr_t offset, int vcpu_id, int access)

{

	u32 *reg;
@@ -530,7 +502,7 @@ static bool handle_mmio_clear_enable_reg(struct kvm_vcpu *vcpu, 
				      vcpu->vcpu_id, ACCESS_WRITE_CLEARBIT);

}



static bool vgic_handle_set_pending_reg(struct kvm *kvm,

bool vgic_handle_set_pending_reg(struct kvm *kvm,

				 struct kvm_exit_mmio *mmio,

				 phys_addr_t offset, int vcpu_id)

{
@@ -567,7 +539,7 @@ static bool vgic_handle_set_pending_reg(struct kvm *kvm, 
	return false;

}



static bool vgic_handle_clear_pending_reg(struct kvm *kvm,

bool vgic_handle_clear_pending_reg(struct kvm *kvm,

				   struct kvm_exit_mmio *mmio,

				   phys_addr_t offset, int vcpu_id)

{
@@ -741,7 +713,7 @@ static u16 vgic_cfg_compress(u32 val) 
 * LSB is always 0. As such, we only keep the upper bit, and use the

 * two above functions to compress/expand the bits

 */

static bool vgic_handle_cfg_reg(u32 *reg, struct kvm_exit_mmio *mmio,

bool vgic_handle_cfg_reg(u32 *reg, struct kvm_exit_mmio *mmio,

			 phys_addr_t offset)

{

	u32 val;
@@ -818,7 +790,7 @@ static void vgic_v2_add_sgi_source(struct kvm_vcpu *vcpu, int irq, int source) 
 * to the distributor but the active state stays in the LRs, because we don't

 * track the active state on the distributor side.

 */

static void vgic_unqueue_irqs(struct kvm_vcpu *vcpu)

void vgic_unqueue_irqs(struct kvm_vcpu *vcpu)

{

	struct vgic_cpu *vgic_cpu = &vcpu->arch.vgic_cpu;

	int i;
@@ -943,21 +915,7 @@ static bool handle_mmio_sgi_clear(struct kvm_vcpu *vcpu, 
		return write_set_clear_sgi_pend_reg(vcpu, mmio, offset, false);

}



/*

 * I would have liked to use the kvm_bus_io_*() API instead, but it

 * cannot cope with banked registers (only the VM pointer is passed

 * around, and we need the vcpu). One of these days, someone please

 * fix it!

 */

struct mmio_range {

	phys_addr_t base;

	unsigned long len;

	int bits_per_irq;

	bool (*handle_mmio)(struct kvm_vcpu *vcpu, struct kvm_exit_mmio *mmio,

			    phys_addr_t offset);

};



static const struct mmio_range vgic_dist_ranges[] = {

static const struct kvm_mmio_range vgic_dist_ranges[] = {

	{

		.base		= GIC_DIST_CTRL,

		.len		= 12,
@@ -1042,12 +1000,12 @@ static const struct mmio_range vgic_dist_ranges[] = { 
	{}

};



static const

struct mmio_range *find_matching_range(const struct mmio_range *ranges,

const

struct kvm_mmio_range *vgic_find_range(const struct kvm_mmio_range *ranges,

				       struct kvm_exit_mmio *mmio,

				       phys_addr_t offset)

{

	const struct mmio_range *r = ranges;

	const struct kvm_mmio_range *r = ranges;



	while (r->len) {

		if (offset >= r->base &&
@@ -1060,7 +1018,7 @@ struct mmio_range *find_matching_range(const struct mmio_range *ranges, 
}



static bool vgic_validate_access(const struct vgic_dist *dist,

				 const struct mmio_range *range,

				 const struct kvm_mmio_range *range,

				 unsigned long offset)

{

	int irq;
@@ -1088,7 +1046,7 @@ static bool vgic_validate_access(const struct vgic_dist *dist, 
static bool call_range_handler(struct kvm_vcpu *vcpu,

			       struct kvm_exit_mmio *mmio,

			       unsigned long offset,

			       const struct mmio_range *range)

			       const struct kvm_mmio_range *range)

{

	u32 *data32 = (void *)mmio->data;

	struct kvm_exit_mmio mmio32;
@@ -1132,18 +1090,18 @@ static bool call_range_handler(struct kvm_vcpu *vcpu, 
 *

 * returns true if the MMIO access could be performed

 */

static bool vgic_handle_mmio_range(struct kvm_vcpu *vcpu, struct kvm_run *run,

bool vgic_handle_mmio_range(struct kvm_vcpu *vcpu, struct kvm_run *run,

			    struct kvm_exit_mmio *mmio,

			    const struct mmio_range *ranges,

			    const struct kvm_mmio_range *ranges,

			    unsigned long mmio_base)

{

	const struct mmio_range *range;

	const struct kvm_mmio_range *range;

	struct vgic_dist *dist = &vcpu->kvm->arch.vgic;

	bool updated_state;

	unsigned long offset;



	offset = mmio->phys_addr - mmio_base;

	range = find_matching_range(ranges, mmio, offset);

	range = vgic_find_range(ranges, mmio, offset);

	if (unlikely(!range || !range->handle_mmio)) {

		pr_warn("Unhandled access %d %08llx %d\n",

			mmio->is_write, mmio->phys_addr, mmio->len);
@@ -1169,12 +1127,6 @@ static bool vgic_handle_mmio_range(struct kvm_vcpu *vcpu, struct kvm_run *run, 
	return true;

}



static inline bool is_in_range(phys_addr_t addr, unsigned long len,

			       phys_addr_t baseaddr, unsigned long size)

{

	return (addr >= baseaddr) && (addr + len <= baseaddr + size);

}



static bool vgic_v2_handle_mmio(struct kvm_vcpu *vcpu, struct kvm_run *run,

				struct kvm_exit_mmio *mmio)

{
@@ -1301,7 +1253,7 @@ static int compute_pending_for_cpu(struct kvm_vcpu *vcpu) 
 * Update the interrupt state and determine which CPUs have pending

 * interrupts. Must be called with distributor lock held.

 */

static void vgic_update_state(struct kvm *kvm)

void vgic_update_state(struct kvm *kvm)

{

	struct vgic_dist *dist = &kvm->arch.vgic;

	struct kvm_vcpu *vcpu;
@@ -1362,12 +1314,12 @@ static inline void vgic_disable_underflow(struct kvm_vcpu *vcpu) 
	vgic_ops->disable_underflow(vcpu);

}



static inline void vgic_get_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr)

void vgic_get_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr)

{

	vgic_ops->get_vmcr(vcpu, vmcr);

}



static void vgic_set_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr)

void vgic_set_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr)

{

	vgic_ops->set_vmcr(vcpu, vmcr);

}
@@ -1417,7 +1369,7 @@ static void vgic_retire_disabled_irqs(struct kvm_vcpu *vcpu) 
 * Queue an interrupt to a CPU virtual interface. Return true on success,

 * or false if it wasn't possible to queue it.

 */

static bool vgic_queue_irq(struct kvm_vcpu *vcpu, u8 sgi_source_id, int irq)

bool vgic_queue_irq(struct kvm_vcpu *vcpu, u8 sgi_source_id, int irq)

{

	struct vgic_cpu *vgic_cpu = &vcpu->arch.vgic_cpu;

	struct vgic_dist *dist = &vcpu->kvm->arch.vgic;
@@ -1703,7 +1655,7 @@ int kvm_vgic_vcpu_pending_irq(struct kvm_vcpu *vcpu) 
	return test_bit(vcpu->vcpu_id, dist->irq_pending_on_cpu);

}



static void vgic_kick_vcpus(struct kvm *kvm)

void vgic_kick_vcpus(struct kvm *kvm)

{

	struct kvm_vcpu *vcpu;

	int c;
@@ -1956,7 +1908,7 @@ static int vgic_v2_init_model(struct kvm *kvm) 
 * Allocate and initialize the various data structures. Must be called

 * with kvm->lock held!

 */

static int vgic_init(struct kvm *kvm)

int vgic_init(struct kvm *kvm)

{

	struct vgic_dist *dist = &kvm->arch.vgic;

	struct kvm_vcpu *vcpu;
@@ -2096,7 +2048,7 @@ static int vgic_v2_map_resources(struct kvm *kvm, 
	return ret;

}



static void vgic_v2_init_emulation(struct kvm *kvm)

void vgic_v2_init_emulation(struct kvm *kvm)

{

	struct vgic_dist *dist = &kvm->arch.vgic;
@@ -2326,7 +2278,7 @@ static bool handle_cpu_mmio_ident(struct kvm_vcpu *vcpu, 
 * CPU Interface Register accesses - these are not accessed by the VM, but by

 * user space for saving and restoring VGIC state.

 */

static const struct mmio_range vgic_cpu_ranges[] = {

static const struct kvm_mmio_range vgic_cpu_ranges[] = {

	{

		.base		= GIC_CPU_CTRL,

		.len		= 12,
@@ -2353,7 +2305,7 @@ static int vgic_attr_regs_access(struct kvm_device *dev, 
				 struct kvm_device_attr *attr,

				 u32 *reg, bool is_write)

{

	const struct mmio_range *r = NULL, *ranges;

	const struct kvm_mmio_range *r = NULL, *ranges;

	phys_addr_t offset;

	int ret, cpuid, c;

	struct kvm_vcpu *vcpu, *tmp_vcpu;
@@ -2394,7 +2346,7 @@ static int vgic_attr_regs_access(struct kvm_device *dev, 
	default:

		BUG();

	}

	r = find_matching_range(ranges, &mmio, offset);

	r = vgic_find_range(ranges, &mmio, offset);



	if (unlikely(!r || !r->handle_mmio)) {

		ret = -ENXIO;
@@ -2440,8 +2392,7 @@ static int vgic_attr_regs_access(struct kvm_device *dev, 
	return ret;

}



static int vgic_set_common_attr(struct kvm_device *dev,

				struct kvm_device_attr *attr)

int vgic_set_common_attr(struct kvm_device *dev, struct kvm_device_attr *attr)

{

	int r;
@@ -2525,8 +2476,7 @@ static int vgic_set_attr(struct kvm_device *dev, struct kvm_device_attr *attr) 
	return -ENXIO;

}



static int vgic_get_common_attr(struct kvm_device *dev,

				struct kvm_device_attr *attr)

int vgic_get_common_attr(struct kvm_device *dev, struct kvm_device_attr *attr)

{

	int r = -ENXIO;
@@ -2581,13 +2531,12 @@ static int vgic_get_attr(struct kvm_device *dev, struct kvm_device_attr *attr) 
	return -ENXIO;

}



static int vgic_has_attr_regs(const struct mmio_range *ranges,

			      phys_addr_t offset)

int vgic_has_attr_regs(const struct kvm_mmio_range *ranges, phys_addr_t offset)

{

	struct kvm_exit_mmio dev_attr_mmio;



	dev_attr_mmio.len = 4;

	if (find_matching_range(ranges, &dev_attr_mmio, offset))

	if (vgic_find_range(ranges, &dev_attr_mmio, offset))

		return 0;

	else

		return -ENXIO;
@@ -2622,12 +2571,12 @@ static int vgic_has_attr(struct kvm_device *dev, struct kvm_device_attr *attr) 
	return -ENXIO;

}



static void vgic_destroy(struct kvm_device *dev)

void vgic_destroy(struct kvm_device *dev)

{

	kfree(dev);

}



static int vgic_create(struct kvm_device *dev, u32 type)

int vgic_create(struct kvm_device *dev, u32 type)

{

	return kvm_vgic_create(dev->kvm, type);

}

virt/kvm/arm/vgic.h

0 → 100644
+120 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2012-2014 ARM Ltd.

 * Author: Marc Zyngier <marc.zyngier@arm.com>

 *

 * Derived from virt/kvm/arm/vgic.c

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program.  If not, see <http://www.gnu.org/licenses/>.

 */



#ifndef __KVM_VGIC_H__

#define __KVM_VGIC_H__



#define VGIC_ADDR_UNDEF		(-1)

#define IS_VGIC_ADDR_UNDEF(_x)  ((_x) == VGIC_ADDR_UNDEF)



#define PRODUCT_ID_KVM		0x4b	/* ASCII code K */

#define IMPLEMENTER_ARM		0x43b



#define ACCESS_READ_VALUE	(1 << 0)

#define ACCESS_READ_RAZ		(0 << 0)

#define ACCESS_READ_MASK(x)	((x) & (1 << 0))

#define ACCESS_WRITE_IGNORED	(0 << 1)

#define ACCESS_WRITE_SETBIT	(1 << 1)

#define ACCESS_WRITE_CLEARBIT	(2 << 1)

#define ACCESS_WRITE_VALUE	(3 << 1)

#define ACCESS_WRITE_MASK(x)	((x) & (3 << 1))



unsigned long *vgic_bitmap_get_shared_map(struct vgic_bitmap *x);



void vgic_update_state(struct kvm *kvm);

int vgic_init_common_maps(struct kvm *kvm);



u32 *vgic_bitmap_get_reg(struct vgic_bitmap *x, int cpuid, u32 offset);

u32 *vgic_bytemap_get_reg(struct vgic_bytemap *x, int cpuid, u32 offset);



void vgic_dist_irq_set_pending(struct kvm_vcpu *vcpu, int irq);

void vgic_dist_irq_clear_pending(struct kvm_vcpu *vcpu, int irq);

void vgic_cpu_irq_clear(struct kvm_vcpu *vcpu, int irq);

void vgic_bitmap_set_irq_val(struct vgic_bitmap *x, int cpuid,

			     int irq, int val);



void vgic_get_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);

void vgic_set_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);



bool vgic_queue_irq(struct kvm_vcpu *vcpu, u8 sgi_source_id, int irq);

void vgic_unqueue_irqs(struct kvm_vcpu *vcpu);



void vgic_reg_access(struct kvm_exit_mmio *mmio, u32 *reg,

		     phys_addr_t offset, int mode);

bool handle_mmio_raz_wi(struct kvm_vcpu *vcpu, struct kvm_exit_mmio *mmio,

			phys_addr_t offset);



static inline

u32 mmio_data_read(struct kvm_exit_mmio *mmio, u32 mask)

{

	return le32_to_cpu(*((u32 *)mmio->data)) & mask;

}



static inline

void mmio_data_write(struct kvm_exit_mmio *mmio, u32 mask, u32 value)

{

	*((u32 *)mmio->data) = cpu_to_le32(value) & mask;

}



struct kvm_mmio_range {

	phys_addr_t base;

	unsigned long len;

	int bits_per_irq;

	bool (*handle_mmio)(struct kvm_vcpu *vcpu, struct kvm_exit_mmio *mmio,

			    phys_addr_t offset);

};



static inline bool is_in_range(phys_addr_t addr, unsigned long len,

			       phys_addr_t baseaddr, unsigned long size)

{

	return (addr >= baseaddr) && (addr + len <= baseaddr + size);

}



const

struct kvm_mmio_range *vgic_find_range(const struct kvm_mmio_range *ranges,

				       struct kvm_exit_mmio *mmio,

				       phys_addr_t offset);



bool vgic_handle_mmio_range(struct kvm_vcpu *vcpu, struct kvm_run *run,

			    struct kvm_exit_mmio *mmio,

			    const struct kvm_mmio_range *ranges,

			    unsigned long mmio_base);



bool vgic_handle_enable_reg(struct kvm *kvm, struct kvm_exit_mmio *mmio,

			    phys_addr_t offset, int vcpu_id, int access);



bool vgic_handle_set_pending_reg(struct kvm *kvm, struct kvm_exit_mmio *mmio,

				 phys_addr_t offset, int vcpu_id);



bool vgic_handle_clear_pending_reg(struct kvm *kvm, struct kvm_exit_mmio *mmio,

				   phys_addr_t offset, int vcpu_id);



bool vgic_handle_cfg_reg(u32 *reg, struct kvm_exit_mmio *mmio,

			 phys_addr_t offset);



void vgic_kick_vcpus(struct kvm *kvm);



int vgic_has_attr_regs(const struct kvm_mmio_range *ranges, phys_addr_t offset);

int vgic_set_common_attr(struct kvm_device *dev, struct kvm_device_attr *attr);

int vgic_get_common_attr(struct kvm_device *dev, struct kvm_device_attr *attr);



int vgic_init(struct kvm *kvm);

void vgic_v2_init_emulation(struct kvm *kvm);



#endif