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authorMarc Zyngier <marc.zyngier@arm.com>2016-04-22 14:25:33 +0300
committerWill Deacon <will.deacon@arm.com>2016-04-25 17:14:00 +0300
commit25fc11aead380501d70b701e136e89d321277177 (patch)
treebef589bd1d1ab792413247e6752040f74226ab83 /drivers/irqchip
parente3661b128e53ee281e1e7c589a5b647890bd6d7c (diff)
downloadlinux-25fc11aead380501d70b701e136e89d321277177.tar.xz
irqchip/gic: Restore CPU interface checking
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>
Diffstat (limited to 'drivers/irqchip')
-rw-r--r--drivers/irqchip/irq-gic.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c
index 282344b95ec2..095bb5b5c3f2 100644
--- a/drivers/irqchip/irq-gic.c
+++ b/drivers/irqchip/irq-gic.c
@@ -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 */