On Fri, Feb 22, 2019 at 10:01:03AM +0000, Marc Zyngier wrote:
> 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,
Thanks.
I have a patch for <= v4.11 which I can send to stable once this patch
reaches torvalds/master.
Is it worth it though, in your opinion?
Cheers
---Dave
