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KVM: arm64: timers: Use CNTPOFF_EL2 to offset the physical timer

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With ECV and CNTPOFF_EL2, it is very easy to offer an offset for
the physical timer. So let's do just that.

Nothing can set the offset yet, so this should have no effect
whatsoever (famous last words...).

Reviewed-by: Colton Lewis <coltonlewis@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230330174800.2677007-5-maz@kernel.org
This commit is contained in:
Marc Zyngier
2023-03-30 18:47:44 +01:00
parent 326349943e
commit 2b4825a869
4 changed files with 21 additions and 2 deletions
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1
include/clocksource/arm_arch_timer.h
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@@ -21,6 +21,7 @@
#define CNTHCTL_EVNTEN (1 << 2)
#define CNTHCTL_EVNTDIR (1 << 3)
#define CNTHCTL_EVNTI (0xF << 4)
#define CNTHCTL_ECV (1 << 12)
enum arch_timer_reg {
ARCH_TIMER_REG_CTRL,