aboutsummaryrefslogtreecommitdiff
path: root/virt/kvm/arm/vgic/vgic-mmio-v3.c
diff options
context:
space:
mode:
authorAndre Przywara <andre.przywara@arm.com>2016-07-15 12:43:32 +0100
committerMarc Zyngier <marc.zyngier@arm.com>2016-07-18 18:14:36 +0100
commit424c33830f53f248a68da125e70d9a4d95a8e010 (patch)
tree9b975ccc2cb6083ce3ebe9ba865e6904dad595f7 /virt/kvm/arm/vgic/vgic-mmio-v3.c
parent1085fdc68c6097244627a02a56bd2d8fe58a1a9c (diff)
downloadlinux-stericsson-424c33830f53f248a68da125e70d9a4d95a8e010.tar.gz
KVM: arm64: vgic-its: Implement basic ITS register handlers
Add emulation for some basic MMIO registers used in the ITS emulation. This includes: - GITS_{CTLR,TYPER,IIDR} - ID registers - GITS_{CBASER,CREADR,CWRITER} (which implement the ITS command buffer handling) - GITS_BASER<n> Most of the handlers are pretty straight forward, only the CWRITER handler is a bit more involved by taking the new its_cmd mutex and then iterating over the command buffer. The registers holding base addresses and attributes are sanitised before storing them. Signed-off-by: Andre Przywara <andre.przywara@arm.com> Reviewed-by: Marc Zyngier <marc.zyngier@arm.com> Tested-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'virt/kvm/arm/vgic/vgic-mmio-v3.c')
-rw-r--r--virt/kvm/arm/vgic/vgic-mmio-v3.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/virt/kvm/arm/vgic/vgic-mmio-v3.c b/virt/kvm/arm/vgic/vgic-mmio-v3.c
index a5c35050c786..84a301d789e0 100644
--- a/virt/kvm/arm/vgic/vgic-mmio-v3.c
+++ b/virt/kvm/arm/vgic/vgic-mmio-v3.c
@@ -23,15 +23,15 @@
#include "vgic-mmio.h"
/* extract @num bytes at @offset bytes offset in data */
-static unsigned long extract_bytes(unsigned long data, unsigned int offset,
- unsigned int num)
+unsigned long extract_bytes(unsigned long data, unsigned int offset,
+ unsigned int num)
{
return (data >> (offset * 8)) & GENMASK_ULL(num * 8 - 1, 0);
}
/* allows updates of any half of a 64-bit register (or the whole thing) */
-static u64 update_64bit_reg(u64 reg, unsigned int offset, unsigned int len,
- unsigned long val)
+u64 update_64bit_reg(u64 reg, unsigned int offset, unsigned int len,
+ unsigned long val)
{
int lower = (offset & 4) * 8;
int upper = lower + 8 * len - 1;