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authorMike Travis <travis@sgi.com>2008-12-16 17:33:54 -0800
committerMike Travis <travis@sgi.com>2008-12-16 17:40:56 -0800
commit95d313cf1c1ecedc8bec5727b09bdacbf67dfc45 (patch)
treeee4aa8aff232bb30bb725c5670bb67d73484022d /arch/x86/kernel/genapic_flat_64.c
parenta1681965011916c2f1f0f1f87e70784f5d5d5be5 (diff)
downloadlinux-next-95d313cf1c1ecedc8bec5727b09bdacbf67dfc45.tar.gz
x86: Add cpu_mask_to_apicid_and
Impact: new API Add a helper function that takes two cpumask's, and's them and then returns the apicid of the result. This removes a need in io_apic.c that uses a temporary cpumask to hold (mask & cfg->domain). Signed-off-by: Mike Travis <travis@sgi.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'arch/x86/kernel/genapic_flat_64.c')
-rw-r--r--arch/x86/kernel/genapic_flat_64.c26
1 files changed, 26 insertions, 0 deletions
diff --git a/arch/x86/kernel/genapic_flat_64.c b/arch/x86/kernel/genapic_flat_64.c
index 50eebd0328fe..1efecd206a74 100644
--- a/arch/x86/kernel/genapic_flat_64.c
+++ b/arch/x86/kernel/genapic_flat_64.c
@@ -158,6 +158,15 @@ static unsigned int flat_cpu_mask_to_apicid(const cpumask_t *cpumask)
return cpus_addr(*cpumask)[0] & APIC_ALL_CPUS;
}
+static unsigned int flat_cpu_mask_to_apicid_and(const cpumask_t *cpumask,
+ const cpumask_t *andmask)
+{
+ unsigned long mask1 = cpus_addr(*cpumask)[0] & APIC_ALL_CPUS;
+ unsigned long mask2 = cpus_addr(*andmask)[0] & APIC_ALL_CPUS;
+
+ return (int)(mask1 & mask2);
+}
+
static unsigned int phys_pkg_id(int index_msb)
{
return hard_smp_processor_id() >> index_msb;
@@ -178,6 +187,7 @@ struct genapic apic_flat = {
.send_IPI_mask_allbutself = flat_send_IPI_mask_allbutself,
.send_IPI_self = apic_send_IPI_self,
.cpu_mask_to_apicid = flat_cpu_mask_to_apicid,
+ .cpu_mask_to_apicid_and = flat_cpu_mask_to_apicid_and,
.phys_pkg_id = phys_pkg_id,
.get_apic_id = get_apic_id,
.set_apic_id = set_apic_id,
@@ -254,6 +264,21 @@ static unsigned int physflat_cpu_mask_to_apicid(const cpumask_t *cpumask)
return BAD_APICID;
}
+static unsigned int physflat_cpu_mask_to_apicid_and(const cpumask_t *cpumask,
+ const cpumask_t *andmask)
+{
+ int cpu;
+
+ /*
+ * We're using fixed IRQ delivery, can only return one phys APIC ID.
+ * May as well be the first.
+ */
+ while ((cpu = next_cpu(-1, *cpumask)) < nr_cpu_ids)
+ if (cpu_isset(cpu, *andmask))
+ return per_cpu(x86_cpu_to_apicid, cpu);
+ return BAD_APICID;
+}
+
struct genapic apic_physflat = {
.name = "physical flat",
.acpi_madt_oem_check = physflat_acpi_madt_oem_check,
@@ -269,6 +294,7 @@ struct genapic apic_physflat = {
.send_IPI_mask_allbutself = physflat_send_IPI_mask_allbutself,
.send_IPI_self = apic_send_IPI_self,
.cpu_mask_to_apicid = physflat_cpu_mask_to_apicid,
+ .cpu_mask_to_apicid_and = physflat_cpu_mask_to_apicid_and,
.phys_pkg_id = phys_pkg_id,
.get_apic_id = get_apic_id,
.set_apic_id = set_apic_id,