linux

iv/linux

History

Christoffer Dall 328e566479 KVM: arm/arm64: vgic: Defer touching GICH_VMCR to vcpu_load/put

We don't have to save/restore the VMCR on every entry to/from the guest,
since on GICv2 we can access the control interface from EL1 and on VHE
systems with GICv3 we can access the control interface from KVM running
in EL2.

GICv3 systems without VHE becomes the rare case, which has to
save/restore the register on each round trip.

Note that userspace accesses may see out-of-date values if the VCPU is
running while accessing the VGIC state via the KVM device API, but this
is already the case and it is up to userspace to quiesce the CPUs before
reading the CPU registers from the GIC for an up-to-date view.

Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <cdall@cs.columbia.edu>
Signed-off-by: Christoffer Dall <cdall@linaro.org>

2017-04-09 07:45:22 -07:00

boot

Merge tag 'juno-fixes-4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux into next/late

2017-03-02 23:08:31 +01:00

configs

ARM: SoC defconfig updates for v4.11

2017-02-23 15:39:32 -08:00

crypto

crypto: arm64/aes - add NEON/Crypto Extensions CBCMAC/CMAC/XCBC driver

2017-02-11 17:50:45 +08:00

include

KVM: arm/arm64: vgic: Defer touching GICH_VMCR to vcpu_load/put