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-rw-r--r--virt/kvm/arm/vgic.c93
1 files changed, 8 insertions, 85 deletions
diff --git a/virt/kvm/arm/vgic.c b/virt/kvm/arm/vgic.c
index e968179e592f..b70174e74868 100644
--- a/virt/kvm/arm/vgic.c
+++ b/virt/kvm/arm/vgic.c
@@ -758,7 +758,6 @@ static bool call_range_handler(struct kvm_vcpu *vcpu,
unsigned long offset,
const struct vgic_io_range *range)
{
- u32 *data32 = (void *)mmio->data;
struct kvm_exit_mmio mmio32;
bool ret;
@@ -775,70 +774,17 @@ static bool call_range_handler(struct kvm_vcpu *vcpu,
mmio32.private = mmio->private;
mmio32.phys_addr = mmio->phys_addr + 4;
- if (mmio->is_write)
- *(u32 *)mmio32.data = data32[1];
+ mmio32.data = &((u32 *)mmio->data)[1];
ret = range->handle_mmio(vcpu, &mmio32, offset + 4);
- if (!mmio->is_write)
- data32[1] = *(u32 *)mmio32.data;
mmio32.phys_addr = mmio->phys_addr;
- if (mmio->is_write)
- *(u32 *)mmio32.data = data32[0];
+ mmio32.data = &((u32 *)mmio->data)[0];
ret |= range->handle_mmio(vcpu, &mmio32, offset);
- if (!mmio->is_write)
- data32[0] = *(u32 *)mmio32.data;
return ret;
}
/**
- * vgic_handle_mmio_range - 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
- * @ranges: array of MMIO ranges in a given region
- * @mmio_base: base address of that region
- *
- * returns true if the MMIO access could be performed
- */
-bool vgic_handle_mmio_range(struct kvm_vcpu *vcpu, struct kvm_run *run,
- struct kvm_exit_mmio *mmio,
- const struct vgic_io_range *ranges,
- unsigned long mmio_base)
-{
- const struct vgic_io_range *range;
- struct vgic_dist *dist = &vcpu->kvm->arch.vgic;
- bool updated_state;
- unsigned long offset;
-
- offset = mmio->phys_addr - mmio_base;
- range = vgic_find_range(ranges, mmio->len, offset);
- if (unlikely(!range || !range->handle_mmio)) {
- pr_warn("Unhandled access %d %08llx %d\n",
- mmio->is_write, mmio->phys_addr, mmio->len);
- return false;
- }
-
- spin_lock(&vcpu->kvm->arch.vgic.lock);
- offset -= range->base;
- if (vgic_validate_access(dist, range, offset)) {
- updated_state = call_range_handler(vcpu, mmio, offset, range);
- } else {
- if (!mmio->is_write)
- memset(mmio->data, 0, mmio->len);
- updated_state = false;
- }
- spin_unlock(&vcpu->kvm->arch.vgic.lock);
- kvm_prepare_mmio(run, mmio);
- kvm_handle_mmio_return(vcpu, run);
-
- if (updated_state)
- vgic_kick_vcpus(vcpu->kvm);
-
- return true;
-}
-
-/**
* vgic_handle_mmio_access - handle an in-kernel MMIO access
* This is called by the read/write KVM IO device wrappers below.
* @vcpu: pointer to the vcpu performing the access
@@ -873,23 +819,24 @@ static int vgic_handle_mmio_access(struct kvm_vcpu *vcpu,
mmio.phys_addr = addr;
mmio.len = len;
mmio.is_write = is_write;
- if (is_write)
- memcpy(mmio.data, val, len);
+ mmio.data = val;
mmio.private = iodev->redist_vcpu;
spin_lock(&dist->lock);
offset -= range->base;
if (vgic_validate_access(dist, range, offset)) {
updated_state = call_range_handler(vcpu, &mmio, offset, range);
- if (!is_write)
- memcpy(val, mmio.data, len);
} else {
if (!is_write)
memset(val, 0, len);
updated_state = false;
}
spin_unlock(&dist->lock);
- kvm_prepare_mmio(run, &mmio);
+ run->mmio.is_write = is_write;
+ run->mmio.len = len;
+ run->mmio.phys_addr = addr;
+ memcpy(run->mmio.data, val, len);
+
kvm_handle_mmio_return(vcpu, run);
if (updated_state)
@@ -898,30 +845,6 @@ static int vgic_handle_mmio_access(struct kvm_vcpu *vcpu,
return 0;
}
-/**
- * vgic_handle_mmio - handle an in-kernel MMIO access for the GIC emulation
- * @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.
- * Calls the actual handling routine for the selected VGIC model.
- */
-bool vgic_handle_mmio(struct kvm_vcpu *vcpu, struct kvm_run *run,
- struct kvm_exit_mmio *mmio)
-{
- if (!irqchip_in_kernel(vcpu->kvm))
- return false;
-
- /*
- * This will currently call either vgic_v2_handle_mmio() or
- * vgic_v3_handle_mmio(), which in turn will call
- * vgic_handle_mmio_range() defined above.
- */
- return vcpu->kvm->arch.vgic.vm_ops.handle_mmio(vcpu, run, mmio);
-}
-
static int vgic_handle_mmio_read(struct kvm_vcpu *vcpu,
struct kvm_io_device *this,
gpa_t addr, int len, void *val)
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