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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>
4.20.x+fslc
Marc Zyngier 2018-07-27 16:03:31 +01:00
parent c6e2ccb66d
commit f842ca8e9c
1 changed files with 9 additions and 0 deletions
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9
drivers/irqchip/irq-gic-v3-its.c
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@ -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);