diff options
| author | Marc Zyngier <marc.zyngier@arm.com> | 2015-09-01 12:08:53 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2015-09-01 19:56:25 +0300 |
| commit | 4a6ac3044f1504fe4521efa7334095c9c9ceecfd (patch) | |
| tree | 7c51a19948f0a4e413ac8137f7ac171e50b61c84 /drivers/irqchip | |
| parent | 01f779f4862b53810ba4eb247f57bd1ad31d1c18 (diff) | |
| download | linux-4a6ac3044f1504fe4521efa7334095c9c9ceecfd.tar.xz | |
irqchip/GIC: Fix EOImode setting for non-DT/ACPI systems
Non-DT/ACPI systems call directly into the GIC driver at init time.
Turns out 0b996fd35957 ("irqchip/GIC: Convert to EOImode == 1")
breaks old non firmware-driven platforms, as the driver only
works out the capability of the platform on the DT/ACPI paths.
Fix this thinko by forcing EOImode==0 on non-DT platforms,
which are not capable of supporting a hypervisor anyway.
Reported-and-tested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Jason Cooper <jason@lakedaemon.net>
Link: http://lkml.kernel.org/r/1441098533-31523-1-git-send-email-marc.zyngier@arm.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'drivers/irqchip')
| -rw-r--r-- | drivers/irqchip/irq-gic.c | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c index 72bf81b8abfc..e6b7ed537952 100644 --- a/drivers/irqchip/irq-gic.c +++ b/drivers/irqchip/irq-gic.c @@ -993,7 +993,7 @@ static const struct irq_domain_ops gic_irq_domain_ops = { .xlate = gic_irq_domain_xlate, }; -void __init gic_init_bases(unsigned int gic_nr, int irq_start, +static void __init __gic_init_bases(unsigned int gic_nr, int irq_start, void __iomem *dist_base, void __iomem *cpu_base, u32 percpu_offset, struct device_node *node) { @@ -1103,6 +1103,19 @@ void __init gic_init_bases(unsigned int gic_nr, int irq_start, gic_pm_init(gic); } +void __init gic_init_bases(unsigned int gic_nr, int irq_start, + void __iomem *dist_base, void __iomem *cpu_base, + u32 percpu_offset, struct device_node *node) +{ + /* + * Non-DT/ACPI systems won't run a hypervisor, so let's not + * bother with these... + */ + static_key_slow_dec(&supports_deactivate); + __gic_init_bases(gic_nr, irq_start, dist_base, cpu_base, + percpu_offset, node); +} + #ifdef CONFIG_OF static int gic_cnt __initdata; @@ -1137,7 +1150,7 @@ gic_of_init(struct device_node *node, struct device_node *parent) if (of_property_read_u32(node, "cpu-offset", &percpu_offset)) percpu_offset = 0; - gic_init_bases(gic_cnt, -1, dist_base, cpu_base, percpu_offset, node); + __gic_init_bases(gic_cnt, -1, dist_base, cpu_base, percpu_offset, node); if (!gic_cnt) gic_init_physaddr(node); @@ -1265,7 +1278,7 @@ gic_v2_acpi_init(struct acpi_table_header *table) * as default IRQ domain to allow for GSI registration and GSI to IRQ * number translation (see acpi_register_gsi() and acpi_gsi_to_irq()). */ - gic_init_bases(0, -1, dist_base, cpu_base, 0, NULL); + __gic_init_bases(0, -1, dist_base, cpu_base, 0, NULL); irq_set_default_host(gic_data[0].domain); acpi_irq_model = ACPI_IRQ_MODEL_GIC; |