[RFC PATCH 26/45] KVM: arm/arm64: vgic-new: Add GICv3 IDREGS register handler
From: andre.przywara@arm.com (Andre Przywara)
Date: 2016-03-25 02:04:49
Also in:
kvm, kvmarm
Subsystem:
kernel virtual machine (kvm), the rest · Maintainers:
Paolo Bonzini, Linus Torvalds
Signed-off-by: Andre Przywara <andre.przywara@arm.com> --- virt/kvm/arm/vgic/vgic_mmio.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+)
diff --git a/virt/kvm/arm/vgic/vgic_mmio.c b/virt/kvm/arm/vgic/vgic_mmio.c
index 6d74b00..544ba31 100644
--- a/virt/kvm/arm/vgic/vgic_mmio.c
+++ b/virt/kvm/arm/vgic/vgic_mmio.c@@ -744,6 +744,26 @@ static int vgic_mmio_write_v3r_pendbase(struct kvm_vcpu *vcpu, /* TODO: implement */ return 0; } + +static int vgic_mmio_read_v3_idregs(struct kvm_vcpu *vcpu, + struct kvm_io_device *this, + gpa_t addr, int len, void *val) +{ + struct vgic_io_device *iodev = container_of(this, + struct vgic_io_device, dev); + u32 regnr = (addr - iodev->base_addr); + u32 reg = 0; + + switch (regnr + GICD_IDREGS) { + case GICD_PIDR2: + /* report a GICv3 compliant implementation */ + reg = 0x3b; + break; + } + + write_mask32(reg , addr & 3, len, val); + return 0; +} #endif /*
@@ -817,6 +837,8 @@ struct vgic_register_region vgic_v3_dist_registers[] = { vgic_mmio_read_config, vgic_mmio_write_config, 2), REGISTER_DESC_WITH_BITS_PER_IRQ_SHARED(GICD_IGRPMODR, vgic_mmio_read_raz, vgic_mmio_write_wi, 1), + REGISTER_DESC_WITH_LENGTH(GICD_IDREGS, + vgic_mmio_read_v3_idregs, vgic_mmio_write_wi, 48), }; struct vgic_register_region vgic_v3_redist_registers[] = {
@@ -830,6 +852,8 @@ struct vgic_register_region vgic_v3_redist_registers[] = { vgic_mmio_read_v3r_propbase, vgic_mmio_write_v3r_propbase, 8), REGISTER_DESC_WITH_LENGTH(GICR_PENDBASER, vgic_mmio_read_v3r_pendbase, vgic_mmio_write_v3r_pendbase, 8), + REGISTER_DESC_WITH_LENGTH(GICR_IDREGS, + vgic_mmio_read_v3_idregs, vgic_mmio_write_wi, 48), }; struct vgic_register_region vgic_v3_private_registers[] = {
--
2.7.3