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irqchip/gic: Restore CPU interface checking

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When introducing the whole CPU feature detection framework,
we lost the capability to detect a mismatched GIC configuration
(using the GICv2 MMIO interface, but having the system register
interface enabled).

In order to solve this, use the new this_cpu_has_cap() helper.
Also move the check to the CPU interface path in order to catch
systems where the first CPU has been correctly configured,
but the secondaries are not.

Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Marc Zyngier 2016-04-22 12:25:33 +01:00 committed by Will Deacon
parent e3661b128e
commit 25fc11aead
1 changed files with 2 additions and 3 deletions
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5
drivers/irqchip/irq-gic.c
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@ -55,7 +55,7 @@
static void gic_check_cpu_features(void)
{
WARN_TAINT_ONCE(cpus_have_cap(ARM64_HAS_SYSREG_GIC_CPUIF),
WARN_TAINT_ONCE(this_cpu_has_cap(ARM64_HAS_SYSREG_GIC_CPUIF),
TAINT_CPU_OUT_OF_SPEC,
"GICv3 system registers enabled, broken firmware!\n");
}
@ -490,6 +490,7 @@ static void gic_cpu_init(struct gic_chip_data *gic)
* Get what the GIC says our CPU mask is.
*/
BUG_ON(cpu >= NR_GIC_CPU_IF);
gic_check_cpu_features();
cpu_mask = gic_get_cpumask(gic);
gic_cpu_map[cpu] = cpu_mask;
@ -1021,8 +1022,6 @@ static void __init __gic_init_bases(unsigned int gic_nr, int irq_start,
BUG_ON(gic_nr >= CONFIG_ARM_GIC_MAX_NR);
gic_check_cpu_features();
gic = &gic_data[gic_nr];
/* Initialize irq_chip */