ARM: KVM: Support vgic-v3

This patch allows to build and use vgic-v3 in 32-bit mode.

Unfortunately, it can not be split in several steps without extra
stubs to keep patches independent and bisectable.  For instance,
virt/kvm/arm/vgic/vgic-v3.c uses function from vgic-v3-sr.c, handling
access to GICv3 cpu interface from the guest requires vgic_v3.vgic_sre
to be already defined.

It is how support has been done:

* handle SGI requests from the guest

* report configured SRE on access to GICv3 cpu interface from the guest

* required vgic-v3 macros are provided via uapi.h

* static keys are used to select GIC backend

* to make vgic-v3 build KVM_ARM_VGIC_V3 guard is removed along with
  the static inlines

Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
This commit is contained in:
Vladimir Murzin
2016-09-12 15:49:24 +01:00
committed by Christoffer Dall
parent a078bedf17
commit acda5430be
14 changed files with 66 additions and 80 deletions

View File

@@ -162,12 +162,10 @@ unsigned int vgic_v2_init_dist_iodev(struct vgic_io_device *dev);
unsigned int vgic_v3_init_dist_iodev(struct vgic_io_device *dev);
#ifdef CONFIG_KVM_ARM_VGIC_V3
u64 vgic_sanitise_outer_cacheability(u64 reg);
u64 vgic_sanitise_inner_cacheability(u64 reg);
u64 vgic_sanitise_shareability(u64 reg);
u64 vgic_sanitise_field(u64 reg, u64 field_mask, int field_shift,
u64 (*sanitise_fn)(u64));
#endif
#endif