On Thu, 17 Dec 2020, Bertrand Marquis wrote:
> 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 <bertrand.marq...@arm.com>
Reviewed-by: Stefano Stabellini <sstabell...@kernel.org>
> ---
> Changes in V2: Rebase
> Changes in V3: Rebase
> Changes in V4: Rebase
>
> ---
> xen/arch/arm/traps.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> 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 {
> --
> 2.17.1
>
