[PATCH v3 06/19] KVM: arm64: ITS: Implement vgic_mmio_uaccess_write_its_creadr
From: eric.auger@redhat.com (Eric Auger)
Date: 2017-03-06 11:34:21
Also in:
kvm, kvmarm
Subsystem:
kernel virtual machine (kvm), the rest · Maintainers:
Paolo Bonzini, Linus Torvalds
GITS_CREADR needs to be restored so let's implement the associated uaccess_write_its callback. Signed-off-by: Eric Auger <eric.auger@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 e9c8f9f..6120c6e 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