linux/include
Marc Zyngier 9404673293 KVM: arm64: timers: Correctly handle TGE flip with CNTPOFF_EL2
Contrary to common belief, HCR_EL2.TGE has a direct and immediate
effect on the way the EL0 physical counter is offset. Flipping
TGE from 1 to 0 while at EL2 immediately changes the way the counter
compared to the CVAL limit.

This means that we cannot directly save/restore the guest's view of
CVAL, but that we instead must treat it as if CNTPOFF didn't exist.
Only in the world switch, once we figure out that we do have CNTPOFF,
can we must the offset back and forth depending on the polarity of
TGE.

Fixes: 2b4825a869 ("KVM: arm64: timers: Use CNTPOFF_EL2 to offset the physical timer")
Reported-by: Ganapatrao Kulkarni <gankulkarni@os.amperecomputing.com>
Tested-by: Ganapatrao Kulkarni <gankulkarni@os.amperecomputing.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
2023-10-12 16:55:21 +01:00
..
acpi Merge branches 'acpi-scan', 'acpi-tad', 'acpi-extlog' and 'acpi-misc' 2023-08-25 20:49:52 +02:00
asm-generic ata changes for 6.6 2023-09-05 12:37:28 -07:00
clocksource
crypto This update includes the following changes: 2023-08-29 11:23:29 -07:00
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keys
kunit - An extensive rework of kexec and crash Kconfig from Eric DeVolder 2023-08-29 14:53:51 -07:00
kvm KVM: arm64: timers: Correctly handle TGE flip with CNTPOFF_EL2 2023-10-12 16:55:21 +01:00
linux KVM: arm64: nvhe: Ignore SVE hint in SMCCC function ID 2023-09-12 13:07:37 +01:00
math-emu
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net Including fixes from netfilter and bpf. 2023-09-07 18:33:07 -07:00
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scsi SCSI misc on 20230909 2023-09-09 12:01:33 -07:00
soc IOMMU Updates for Linux v6.6 2023-09-01 16:54:25 -07:00
sound ASoC: Name iov_iter argument as iterator instead of buffer 2023-09-01 15:38:49 +02:00
target
trace tracing: Replace strlcpy with strscpy in trace/events/task.h 2023-09-01 21:00:00 -04:00
uapi RISC-V Patches for the 6.6 Merge Window, Part 2 (try 2) 2023-09-09 14:25:11 -07:00
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xen dma-maping updates for Linux 6.6 2023-08-29 20:32:10 -07:00