From: Bertrand Marquis Date: Thu, 17 Dec 2020 15:38:08 +0000 (+0000) Subject: xen/arm: Activate TID3 in HCR_EL2 X-Git-Tag: archive/raspbian/4.16.0+51-g0941d6cb-1+rpi1~2^2~42^2~1214 X-Git-Url: https://dgit.raspbian.org/%22http://www.example.com/cgi/success/%22http:/www.example.com/cgi/success?a=commitdiff_plain;h=6ea3e32a5e0e6ba0f568aa5fd5a6b016c0c21ca0;p=xen.git xen/arm: Activate TID3 in HCR_EL2 Activate TID3 bit in HCR register when starting a guest. This will trap all coprecessor ID registers so that we can give to guest values corresponding to what they can actually use and mask some features to guests even though they would be supported by the underlying hardware (like SVE or MPAM). Signed-off-by: Bertrand Marquis Reviewed-by: Stefano Stabellini --- diff --git a/xen/arch/arm/traps.c b/xen/arch/arm/traps.c index 28d9d64558..c1a9ad6056 100644 --- a/xen/arch/arm/traps.c +++ b/xen/arch/arm/traps.c @@ -98,7 +98,7 @@ register_t get_default_hcr_flags(void) { return (HCR_PTW|HCR_BSU_INNER|HCR_AMO|HCR_IMO|HCR_FMO|HCR_VM| (vwfi != NATIVE ? (HCR_TWI|HCR_TWE) : 0) | - HCR_TSC|HCR_TAC|HCR_SWIO|HCR_TIDCP|HCR_FB|HCR_TSW); + HCR_TID3|HCR_TSC|HCR_TAC|HCR_SWIO|HCR_TIDCP|HCR_FB|HCR_TSW); } static enum {