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irqchip/gic-v3-its: Change initialization ordering for LPIs

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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>
This commit is contained in:
Marc Zyngier
2018-07-27 14:51:04 +01:00
parent a23d3bb05c
commit d38a71c545
1 changed files with 12 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
drivers/irqchip/irq-gic-v3.c
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@@ -653,7 +653,9 @@ early_param("irqchip.gicv3_nolpi", gicv3_nolpi_cfg);
static int gic_dist_supports_lpis(void) 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) 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); 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 */ /* initialise system registers */
gic_cpu_sys_reg_init(); gic_cpu_sys_reg_init();
} }
@@ -689,6 +687,10 @@ static void gic_cpu_init(void)
static int gic_starting_cpu(unsigned int cpu) static int gic_starting_cpu(unsigned int cpu)
{ {
gic_cpu_init(); gic_cpu_init();
if (gic_dist_supports_lpis())
its_cpu_init();
return 0; return 0;
} }
@@ -1127,14 +1129,16 @@ static int __init gic_init_bases(void __iomem *dist_base,
gic_update_vlpi_properties(); 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_smp_init();
gic_dist_init(); gic_dist_init();
gic_cpu_init(); gic_cpu_init();
gic_cpu_pm_init(); gic_cpu_pm_init();
if (gic_dist_supports_lpis()) {
its_init(handle, &gic_data.rdists, gic_data.domain);
its_cpu_init();
}
return 0; return 0;
out_free: out_free: