KVM: arm64: timers: Allow physical offset without CNTPOFF_EL2

Browse source

CNTPOFF_EL2 is awesome, but it is mostly vapourware, and no publicly
available implementation has it. So for the common mortals, let's
implement the emulated version of this thing.

It means trapping accesses to the physical counter and timer, and
emulate some of it as necessary.

As for CNTPOFF_EL2, nobody sets the offset yet.

Reviewed-by: Colton Lewis <coltonlewis@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230330174800.2677007-6-maz@kernel.org

...

This commit is contained in:

Marc Zyngier 2023-03-30 18:47:45 +01:00

parent 2b4825a869

commit c605ee2450

4 changed files with 98 additions and 29 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

2

arch/arm64/include/asm/sysreg.h

View file

98

arch/arm64/kvm/arch_timer.c

View file

18

arch/arm64/kvm/hyp/nvhe/timer-sr.c

View file

9

arch/arm64/kvm/sys_regs.c

View file