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authorMarc Zyngier <marc.zyngier@arm.com>2018-07-27 14:51:04 +0100
committerMarc Zyngier <marc.zyngier@arm.com>2018-10-02 10:37:27 +0100
commitd38a71c5452529fd3326b0ae488292e5fbd8d2a1 (patch)
tree5d620246e48e34e6904d6e113ade5da437e82f32 /drivers/irqchip
parenta23d3bb05ccbd815c79293d2207fedede0b3515d (diff)
downloadlinux-d38a71c5452529fd3326b0ae488292e5fbd8d2a1.tar.bz2
irqchip/gic-v3-its: Change initialization ordering for LPIs
We currently initialize the LPIs (and the ITS) fairly early, even before the SMP support and the CPU interface. This is a bit odd (as LPIs are not exactly crutial for the early boot process), and is going to cause issues when reorganizing the probing code. Let's move this initialization later. Reviewed-by: Julien Thierry <julien.thierry@arm.com> 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 'drivers/irqchip')
-rw-r--r--drivers/irqchip/irq-gic-v3.c20
1 files changed, 12 insertions, 8 deletions
diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c
index d5912f1ec884..6232f98ef81b 100644
--- a/drivers/irqchip/irq-gic-v3.c
+++ b/drivers/irqchip/irq-gic-v3.c
@@ -653,7 +653,9 @@ early_param("irqchip.gicv3_nolpi", gicv3_nolpi_cfg);
static int gic_dist_supports_lpis(void)
{
- return !!(readl_relaxed(gic_data.dist_base + GICD_TYPER) & GICD_TYPER_LPIS) && !gicv3_nolpi;
+ return (IS_ENABLED(CONFIG_ARM_GIC_V3_ITS) &&
+ !!(readl_relaxed(gic_data.dist_base + GICD_TYPER) & GICD_TYPER_LPIS) &&
+ !gicv3_nolpi);
}
static void gic_cpu_init(void)
@@ -673,10 +675,6 @@ static void gic_cpu_init(void)
gic_cpu_config(rbase, gic_redist_wait_for_rwp);
- /* Give LPIs a spin */
- if (IS_ENABLED(CONFIG_ARM_GIC_V3_ITS) && gic_dist_supports_lpis())
- its_cpu_init();
-
/* initialise system registers */
gic_cpu_sys_reg_init();
}
@@ -689,6 +687,10 @@ static void gic_cpu_init(void)
static int gic_starting_cpu(unsigned int cpu)
{
gic_cpu_init();
+
+ if (gic_dist_supports_lpis())
+ its_cpu_init();
+
return 0;
}
@@ -1127,14 +1129,16 @@ static int __init gic_init_bases(void __iomem *dist_base,
gic_update_vlpi_properties();
- if (IS_ENABLED(CONFIG_ARM_GIC_V3_ITS) && gic_dist_supports_lpis())
- its_init(handle, &gic_data.rdists, gic_data.domain);
-
gic_smp_init();
gic_dist_init();
gic_cpu_init();
gic_cpu_pm_init();
+ if (gic_dist_supports_lpis()) {
+ its_init(handle, &gic_data.rdists, gic_data.domain);
+ its_cpu_init();
+ }
+
return 0;
out_free: