kernel/linux
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ synced 2026-11-13 07:31:07 +00:00
Code Issues Releases Packages Activity
linux/virt/kvm/arm
History
Marc Zyngier e5a290c4ff arm/arm64: KVM: Add PSCI version selection API 
commit 85bd0ba1ff upstream.

Although we've implemented PSCI 0.1, 0.2 and 1.0, we expose either 0.1
or 1.0 to a guest, defaulting to the latest version of the PSCI
implementation that is compatible with the requested version. This is
no different from doing a firmware upgrade on KVM.

But in order to give a chance to hypothetical badly implemented guests
that would have a fit by discovering something other than PSCI 0.2,
let's provide a new API that allows userspace to pick one particular
version of the API.

This is implemented as a new class of "firmware" registers, where
we expose the PSCI version. This allows the PSCI version to be
save/restored as part of a guest migration, and also set to
any supported version if the guest requires it.

Cc: stable@vger.kernel.org #4.16
Reviewed-by: Christoffer Dall <cdall@kernel.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2018-05-01 12:58:27 -07:00
..
hyp kvm: arm/arm64: vgic-v3: Tighten synchronization for guests using v2 on v3 2018-03-21 12:06:43 +01:00
vgic KVM: arm/arm64: vgic-its: Fix potential overrun in vgic_copy_lpi_list 2018-04-24 09:36:23 +02:00
aarch32.c KVM: arm64: Make kvm_condition_valid32() accessible from EL2 2017-06-15 09:44:58 +01:00
arch_timer.c KVM: arm/arm64: Reduce verbosity of KVM init log 2018-03-21 12:06:43 +01:00
arm.c KVM: arm/arm64: Close VMID generation race 2018-05-01 12:58:22 -07:00
mmio.c KVM: Fix stack-out-of-bounds read in write_mmio 2018-01-17 09:45:17 +01:00
mmu.c KVM: arm/arm64: Reduce verbosity of KVM init log 2018-03-21 12:06:43 +01:00
perf.c KVM: arm/arm64: Move shared files to virt/kvm/arm 2017-05-04 13:57:26 +02:00
pmu.c KVM: arm/arm64: PMU: Fix overflow interrupt injection 2017-07-25 14:18:01 +01:00
psci.c arm/arm64: KVM: Add PSCI version selection API 2018-05-01 12:58:27 -07:00
trace.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00