Hi Stefano,
On 18/10/17 22:29, Stefano Stabellini wrote:
Xen uses non-secure group1 interrupts, however it doesn't configure the
GICv3 accordingly. Xen needs to set GICD_IGROUPR for SPIs and
GICR_IGROUPR0 for local interrupt to "1" to specify that interrupts
belong to group1. This is particularly important if the system has
GICD_CTLR.DS set, also see commit
7c9b973061b03af62734f613f6abec46c0dd4a88 in Linux.
Signed-off-by: Stefano Stabellini <sstabell...@kernel.org>
Reviewed-by: Julien Grall <julien.gr...@linaro.org>
Released-acked-by: Julien Grall <julien.gr...@linaro.org>
Cheers,
---
This is a candidate for stable backports.
diff --git a/xen/arch/arm/gic-v3.c b/xen/arch/arm/gic-v3.c
index 74d00e0..77da892 100644
--- a/xen/arch/arm/gic-v3.c
+++ b/xen/arch/arm/gic-v3.c
@@ -569,6 +569,13 @@ static void __init gicv3_dist_init(void)
for ( i = NR_GIC_LOCAL_IRQS; i < nr_lines; i += 32 )
writel_relaxed(0xffffffff, GICD + GICD_ICENABLER + (i / 32) * 4);
+ /*
+ * Configure SPIs as non-secure Group-1. This will only matter
+ * if the GIC only has a single security state.
+ */
+ for ( i = NR_GIC_LOCAL_IRQS; i < nr_lines; i += 32 )
+ writel_relaxed(GENMASK(31, 0), GICD + GICD_IGROUPR + (i / 32) * 4);
+
gicv3_dist_wait_for_rwp();
/* Turn on the distributor */
@@ -775,6 +782,8 @@ static int gicv3_cpu_init(void)
*/
writel_relaxed(0xffff0000, GICD_RDIST_SGI_BASE + GICR_ICENABLER0);
writel_relaxed(0x0000ffff, GICD_RDIST_SGI_BASE + GICR_ISENABLER0);
+ /* Configure SGIs/PPIs as non-secure Group-1 */
+ writel_relaxed(GENMASK(31, 0), GICD_RDIST_SGI_BASE + GICR_IGROUPR0);
gicv3_redist_wait_for_rwp();
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--
Julien Grall
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