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Christoffer Dall 3e27597687 KVM: arm64: Only sign-extend MMIO up to register width 
commit b6ae256afd upstream.

On AArch64 you can do a sign-extended load to either a 32-bit or 64-bit
register, and we should only sign extend the register up to the width of
the register as specified in the operation (by using the 32-bit Wn or
64-bit Xn register specifier).

As it turns out, the architecture provides this decoding information in
the SF ("Sixty-Four" -- how cute...) bit.

Let's take advantage of this with the usual 32-bit/64-bit header file
dance and do the right thing on AArch64 hosts.

Signed-off-by: Christoffer Dall <christoffer.dall@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20191212195055.5541-1-christoffer.dall@arm.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2020-02-11 04:36:47 -08:00
..
hyp KVM: arm: vgic-v3: Mark expected switch fall-through 2019-07-26 15:37:11 +01:00
vgic KVM: arm/arm64: vgic: Use wrapper function to lock/unlock all vcpus in kvm_vgic_create() 2019-12-06 11:41:38 +00:00
aarch32.c KVM: arm/arm64: Correct AArch32 SPSR on exception entry 2020-02-11 04:36:46 -08:00
arch_timer.c KVM: arm/arm64: Let the timer expire in hardirq context on RT 2019-11-07 16:13:33 +00:00
arm.c KVM: arm/arm64: Get rid of unused arg in cpu_init_hyp_mode() 2019-12-06 11:41:18 +00:00
hypercalls.c KVM: arm64: Support stolen time reporting via shared structure 2019-10-21 19:20:28 +01:00
mmio.c KVM: arm64: Only sign-extend MMIO up to register width 2020-02-11 04:36:47 -08:00
mmu.c KVM: arm/arm64: Properly handle faulting of device mappings 2019-12-12 16:22:40 +00:00
perf.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
pmu.c KVM: arm64: pmu: Reset sample period on overflow handling 2019-10-20 10:47:07 +01:00
psci.c KVM: arm/arm64: Factor out hypercall handling from PSCI code 2019-10-21 19:20:26 +01:00
pvtime.c KVM: arm64: Provide VCPU attributes for stolen time 2019-10-21 19:20:29 +01:00
trace.h KVM: arm/arm64: Fix TRACE_INCLUDE_PATH 2019-02-19 21:05:51 +00:00