[PATCH] arm/arm64: KVM: Map the BSS at HYP

[Christoffer Dall]

On Thu, Oct 20, 2016 at 02:00:41PM +0100, Marc Zyngier wrote:
> When used with a compiler that doesn't implement "asm goto"
> (such as the AArch64 port of GCC 4.8), jump labels generate a
> memory access to find out about the value of the key (instead
> of just patching the code). The key itself is likely to be
> stored in the BSS.
> 
> This is perfectly fine, except that we don't map the BSS at HYP,
> leading to an exploding kernel at the first access. The obvious
> fix is simply to map the BSS there (which should have been done
> a long while ago, but hey...).
> 
> Reported-by: Eric Auger <eric.auger at redhat.com>
> Tested-by: Eric Auger <eric.auger at redhat.com>
> Signed-off-by: Marc Zyngier <marc.zyngier at arm.com>

Acked-by: Christoffer Dall <christoffer.dall at linaro.org>