On Thu, 21 Feb 2019 11:42:32 +0000
Dave Martin <Dave.Martin@xxxxxxx> wrote:
> Due to what looks like a typo dating back to the original addition
> of FPEXC32_EL2 handling, KVM currently initialises this register to
> an architecturally invalid value.
>
> As a result, the VECITR field (RES1) in bits [10:8] is initialised
> with 0, and the two reserved (RES0) bits [6:5] are initialised with
> 1. (In the Common VFP Subarchitecture as specified by ARMv7-A,
> these two bits were IMP DEF. ARMv8-A removes them.)
>
> This patch changes the reset value from 0x70 to 0x700, which
> reflects the architectural constraints and is presumably what was
> originally intended.
>
> Cc: <stable@xxxxxxxxxxxxxxx> # 4.12.x-
> Cc: Marc Zyngier <marc.zyngier@xxxxxxx>
> Cc: Christoffer Dall <christoffer.dall@xxxxxxx>
> Fixes: 62a89c44954f ("arm64: KVM: 32bit handling of coprocessor traps")
> Signed-off-by: Dave Martin <Dave.Martin@xxxxxxx>
Applied to -next.
Thanks,
M.
--
Without deviation from the norm, progress is not possible.
