| Message ID | d89992ce6177bee2c5331cdc3a90d5b189669d0d.1608214355.git.bertrand.marquis@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | xen/arm: Emulate ID registers | expand |
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.marquis@arm.com> Reviewed-by: Stefano Stabellini <sstabellini@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 >
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 {
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@arm.com> --- 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(-)