From: Ian Campbell Date: Wed, 26 Mar 2014 13:38:45 +0000 (+0000) Subject: xen: arm64: disable alignment traps X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~5286 X-Git-Url: https://dgit.raspbian.org/%22http:/www.example.com/cgi/%22https:/%22bookmarks://%22Dat/%22http:/www.example.com/cgi/%22https:/%22bookmarks:/%22Dat?a=commitdiff_plain;h=58bbe7d71239db508c30099bf7b6db7c458f3336;p=xen.git xen: arm64: disable alignment traps The mem* primitives which I am about to import from Linux in a subsequent patch rely on the hardware handling misalignment. The benefits of an optimised memcpy etc outweigh the downsides. Signed-off-by: Ian Campbell Acked-by: Julien Grall Acked-by: Tim Deegan --- diff --git a/xen/arch/arm/arm64/head.S b/xen/arch/arm/arm64/head.S index 3077f1bb78..2a13527459 100644 --- a/xen/arch/arm/arm64/head.S +++ b/xen/arch/arm/arm64/head.S @@ -239,9 +239,9 @@ skip_bss: * Write-implies-XN disabled (for now), * D-cache disabled (for now), * I-cache enabled, - * Alignment checking enabled, + * Alignment checking disabled, * MMU translation disabled (for now). */ - ldr x0, =(HSCTLR_BASE|SCTLR_A) + ldr x0, =(HSCTLR_BASE) msr SCTLR_EL2, x0 /* Rebuild the boot pagetable's first-level entries. The structure