GITS_CREADR needs to be restored so let's implement the associated
uaccess_write_its callback.
Signed-off-by: Eric Auger <eric.au...@redhat.com>
---
---
virt/kvm/arm/vgic/vgic-its.c | 22 +++++++++++++++++++++-
1 file changed, 21 insertions(+), 1 deletion(-)
diff --git a/virt/kvm/arm/vgic/vgic-its.c b/virt/kvm/arm/vgic/vgic-its.c
index 55671585..e174220 100644
--- a/virt/kvm/arm/vgic/vgic-its.c
+++ b/virt/kvm/arm/vgic/vgic-its.c
@@ -1225,6 +1225,25 @@ static unsigned long vgic_mmio_read_its_creadr(struct
kvm *kvm,
return extract_bytes(its->creadr, addr & 0x7, len);
}
+static void vgic_mmio_uaccess_write_its_creadr(struct kvm *kvm,
+ struct vgic_its *its,
+ gpa_t addr, unsigned int len,
+ unsigned long val)
+{
+ u32 reg;
+
+ mutex_lock(&its->cmd_lock);
+ reg = update_64bit_reg(its->creadr, addr & 7, len, val);
+ reg = ITS_CMD_OFFSET(reg);
+ if (reg >= ITS_CMD_BUFFER_SIZE(its->cbaser)) {
+ mutex_unlock(&its->cmd_lock);
+ return;
+ }
+
+ its->creadr = reg;
+ mutex_unlock(&its->cmd_lock);
+}
+
#define BASER_INDEX(addr) (((addr) / sizeof(u64)) & 0x7)
static unsigned long vgic_mmio_read_its_baser(struct kvm *kvm,
struct vgic_its *its,
@@ -1320,7 +1339,8 @@ static struct vgic_register_region its_registers[] = {
vgic_mmio_read_its_cwriter, vgic_mmio_write_its_cwriter, NULL,
8, VGIC_ACCESS_64bit | VGIC_ACCESS_32bit),
REGISTER_ITS_DESC(GITS_CREADR,
- vgic_mmio_read_its_creadr, its_mmio_write_wi, NULL, 8,
+ vgic_mmio_read_its_creadr, its_mmio_write_wi,
+ vgic_mmio_uaccess_write_its_creadr, 8,
VGIC_ACCESS_64bit | VGIC_ACCESS_32bit),
REGISTER_ITS_DESC(GITS_BASER,
vgic_mmio_read_its_baser, vgic_mmio_write_its_baser, NULL, 0x40,
--
2.5.5
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