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authorMarc Zyngier <marc.zyngier@arm.com>2018-07-27 17:03:31 +0200
committerMarc Zyngier <marc.zyngier@arm.com>2018-10-02 11:37:37 +0200
commitf842ca8e9c8a80d07f5589536311250d7d6018f9 (patch)
tree3d0e0854d5f7b568a1b037efcbf0dc0a75ab1c51 /drivers/irqchip/irq-gic-v3-its.c
parentirqchip/gic-v3-its: Use pre-programmed redistributor tables with kdump kernels (diff)
downloadlinux-f842ca8e9c8a80d07f5589536311250d7d6018f9.tar.xz
linux-f842ca8e9c8a80d07f5589536311250d7d6018f9.zip
irqchip/gic-v3-its: Check that all RDs have the same property table
If booting with LPIs enabled, all the redistributors must have the exact same property table. No ifs, no buts. Tested-by: Jeremy Linton <jeremy.linton@arm.com> Tested-by: Bhupesh Sharma <bhsharma@redhat.com> Tested-by: Lei Zhang <zhang.lei@jp.fujitsu.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to '')
-rw-r--r--drivers/irqchip/irq-gic-v3-its.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c
index 83d5573f56e9..828af1a68b8e 100644
--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -2029,6 +2029,15 @@ static void its_cpu_init_lpis(void)
val = readl_relaxed(rbase + GICR_CTLR);
if ((gic_rdists->flags & RDIST_FLAGS_RD_TABLES_PREALLOCATED) &&
(val & GICR_CTLR_ENABLE_LPIS)) {
+ /*
+ * Check that we get the same property table on all
+ * RDs. If we don't, this is hopeless.
+ */
+ paddr = gicr_read_propbaser(rbase + GICR_PROPBASER);
+ paddr &= GENMASK_ULL(51, 12);
+ if (WARN_ON(gic_rdists->prop_table_pa != paddr))
+ add_taint(TAINT_CRAP, LOCKDEP_STILL_OK);
+
paddr = gicr_read_pendbaser(rbase + GICR_PENDBASER);
paddr &= GENMASK_ULL(51, 16);