[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Xen-devel] [PATCH 2/7] xen/arm/vgic-v2: Ignore write to GICD_ISACTIVERn registers



Guests attempt to write into these registers on resume (for example Linux).
Without this patch a data abort exception will be raised to the guest.
This patch handles the write access by ignoring it. This should be fine for
now because reading these registers is already handled as 'read as zero'.

Signed-off-by: Mirela Simonovic <mirela.simonovic@xxxxxxxxxx>
---
 xen/arch/arm/vgic-v2.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/xen/arch/arm/vgic-v2.c b/xen/arch/arm/vgic-v2.c
index 646d1f3d12..b088376ed0 100644
--- a/xen/arch/arm/vgic-v2.c
+++ b/xen/arch/arm/vgic-v2.c
@@ -484,11 +484,10 @@ static int vgic_v2_distr_mmio_write(struct vcpu *v, 
mmio_info_t *info,
         return 0;
 
     case VRANGE32(GICD_ISACTIVER, GICD_ISACTIVERN):
-        if ( dabt.size != DABT_WORD ) goto bad_width;
         printk(XENLOG_G_ERR
                "%pv: vGICD: unhandled word write %#"PRIregister" to 
ISACTIVER%d\n",
                v, r, gicd_reg - GICD_ISACTIVER);
-        return 0;
+        goto write_ignore_32;
 
     case VRANGE32(GICD_ICACTIVER, GICD_ICACTIVERN):
         printk(XENLOG_G_ERR
-- 
2.13.0


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxxx
https://lists.xenproject.org/mailman/listinfo/xen-devel

 


Rackspace

Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.