[PATCH v4 8/8] xen/arm: Activate TID3 in HCR_EL2

[Bertrand Marquis <bertrand.marquis@xxxxxxx>]

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.marquis@xxxxxxx>
---
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