[PATCH] arm64: Force the use of CNTVCT_EL0 in __delay()

[Will Deacon]

On Fri, 13 Feb 2026 14:16:19 +0000, Marc Zyngier wrote:
> Quentin forwards a report from Hyesoo Yu, describing an interesting
> problem with the use of WFxT in __delay() when a vcpu is loaded and
> that KVM is *not* in VHE mode (either nVHE or hVHE).
> 
> In this case, CNTVOFF_EL2 is set to a non-zero value to reflect the
> state of the guest virtual counter. At the same time, __delay() is
> using get_cycles() to read the counter value, which is indirected to
> reading CNTPCT_EL0.
> 
> [...]

Applied to arm64 (for-next/core), thanks!

[1/1] arm64: Force the use of CNTVCT_EL0 in __delay()
      https://git.kernel.org/arm64/c/29cc0f3aa7c6

Cheers,
-- 
Will

https://fixes.arm64.dev
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