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authorLinus Torvalds <torvalds@linux-foundation.org>2012-10-01 10:45:54 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-10-01 10:45:54 -0700
commit80749df4a1492004fdb7bd2cec094b92260c6d27 (patch)
treecf44c514edd0fc9a4e3614eed09ffa3f00d8322f
parent2fff56641be96acd938c8bd8f5f4f6d04795436f (diff)
parent57c078ce13983d27c83f962b3e9722887209005c (diff)
Merge branch 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86/apic changes from Ingo Molnar: "Smaller fixes and cleanups" * 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/api: Rename mp_register_lapic in a comment x86/irq/i8259: Fix incorrect comment x86: dt: Use linear irq domain for ioapic(s)
-rw-r--r--arch/x86/kernel/acpi/boot.c2
-rw-r--r--arch/x86/kernel/devicetree.c51
-rw-r--r--arch/x86/kernel/i8259.c2
3 files changed, 44 insertions, 11 deletions
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index b2297e58c6e..e651f7a589a 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -656,7 +656,7 @@ static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
acpi_register_lapic(physid, ACPI_MADT_ENABLED);
/*
- * If mp_register_lapic successfully generates a new logical cpu
+ * If acpi_register_lapic successfully generates a new logical cpu
* number, then the following will get us exactly what was mapped
*/
cpumask_andnot(new_map, cpu_present_mask, tmp_map);
diff --git a/arch/x86/kernel/devicetree.c b/arch/x86/kernel/devicetree.c
index 3ae2ced4a87..b1581527a23 100644
--- a/arch/x86/kernel/devicetree.c
+++ b/arch/x86/kernel/devicetree.c
@@ -342,6 +342,47 @@ const struct irq_domain_ops ioapic_irq_domain_ops = {
.xlate = ioapic_xlate,
};
+static void dt_add_ioapic_domain(unsigned int ioapic_num,
+ struct device_node *np)
+{
+ struct irq_domain *id;
+ struct mp_ioapic_gsi *gsi_cfg;
+ int ret;
+ int num;
+
+ gsi_cfg = mp_ioapic_gsi_routing(ioapic_num);
+ num = gsi_cfg->gsi_end - gsi_cfg->gsi_base + 1;
+
+ id = irq_domain_add_linear(np, num, &ioapic_irq_domain_ops,
+ (void *)ioapic_num);
+ BUG_ON(!id);
+ if (gsi_cfg->gsi_base == 0) {
+ /*
+ * The first NR_IRQS_LEGACY irq descs are allocated in
+ * early_irq_init() and need just a mapping. The
+ * remaining irqs need both. All of them are preallocated
+ * and assigned so we can keep the 1:1 mapping which the ioapic
+ * is having.
+ */
+ ret = irq_domain_associate_many(id, 0, 0, NR_IRQS_LEGACY);
+ if (ret)
+ pr_err("Error mapping legacy IRQs: %d\n", ret);
+
+ if (num > NR_IRQS_LEGACY) {
+ ret = irq_create_strict_mappings(id, NR_IRQS_LEGACY,
+ NR_IRQS_LEGACY, num - NR_IRQS_LEGACY);
+ if (ret)
+ pr_err("Error creating mapping for the "
+ "remaining IRQs: %d\n", ret);
+ }
+ irq_set_default_host(id);
+ } else {
+ ret = irq_create_strict_mappings(id, gsi_cfg->gsi_base, 0, num);
+ if (ret)
+ pr_err("Error creating IRQ mapping: %d\n", ret);
+ }
+}
+
static void __init ioapic_add_ofnode(struct device_node *np)
{
struct resource r;
@@ -356,15 +397,7 @@ static void __init ioapic_add_ofnode(struct device_node *np)
for (i = 0; i < nr_ioapics; i++) {
if (r.start == mpc_ioapic_addr(i)) {
- struct irq_domain *id;
- struct mp_ioapic_gsi *gsi_cfg;
-
- gsi_cfg = mp_ioapic_gsi_routing(i);
-
- id = irq_domain_add_legacy(np, 32, gsi_cfg->gsi_base, 0,
- &ioapic_irq_domain_ops,
- (void*)i);
- BUG_ON(!id);
+ dt_add_ioapic_domain(i, np);
return;
}
}
diff --git a/arch/x86/kernel/i8259.c b/arch/x86/kernel/i8259.c
index 36d1853e91a..9a5c460404d 100644
--- a/arch/x86/kernel/i8259.c
+++ b/arch/x86/kernel/i8259.c
@@ -263,7 +263,7 @@ static void i8259A_shutdown(void)
* out of.
*/
outb(0xff, PIC_MASTER_IMR); /* mask all of 8259A-1 */
- outb(0xff, PIC_SLAVE_IMR); /* mask all of 8259A-1 */
+ outb(0xff, PIC_SLAVE_IMR); /* mask all of 8259A-2 */
}
static struct syscore_ops i8259_syscore_ops = {