Merge branch 'drm-patches' of master.kernel.org:/pub/scm/linux/kernel/git/airlied...

[linux-drm-fsl-dcu.git] / arch / x86_64 / kernel / genapic_flat.c

diff --git a/arch/x86_64/kernel/genapic_flat.c b/arch/x86_64/kernel/genapic_flat.c
index 50ad153eaac416f42d7d93f90b23e23a11df07c7..ecb01eefdd27b4b63c14352f0fff569ef9d60eca 100644 (file)
--- a/arch/x86_64/kernel/genapic_flat.c
+++ b/arch/x86_64/kernel/genapic_flat.c
@@ -8,6 +8,7 @@
  * Martin Bligh, Andi Kleen, James Bottomley, John Stultz, and
  * James Cleverdon.
  */
+#include <linux/errno.h>
 #include <linux/threads.h>
 #include <linux/cpumask.h>
 #include <linux/string.h>
@@ -16,12 +17,27 @@
 #include <linux/init.h>
 #include <asm/smp.h>
 #include <asm/ipi.h>
+#include <asm/genapic.h>
 
 static cpumask_t flat_target_cpus(void)
 {
        return cpu_online_map;
 }
 
+static cpumask_t flat_vector_allocation_domain(int cpu)
+{
+       /* Careful. Some cpus do not strictly honor the set of cpus
+        * specified in the interrupt destination when using lowest
+        * priority interrupt delivery mode.
+        *
+        * In particular there was a hyperthreading cpu observed to
+        * deliver interrupts to the wrong hyperthread when only one
+        * hyperthread was specified in the interrupt desitination.
+        */
+       cpumask_t domain = { { [0] = APIC_ALL_CPUS, } };
+       return domain;
+}
+
 /*
  * Set up the logical destination ID.
  *
@@ -46,31 +62,10 @@ static void flat_init_apic_ldr(void)
 static void flat_send_IPI_mask(cpumask_t cpumask, int vector)
 {
        unsigned long mask = cpus_addr(cpumask)[0];
-       unsigned long cfg;
        unsigned long flags;
 
        local_irq_save(flags);
-
-       /*
-        * Wait for idle.
-        */
-       apic_wait_icr_idle();
-
-       /*
-        * prepare target chip field
-        */
-       cfg = __prepare_ICR2(mask);
-       apic_write(APIC_ICR2, cfg);
-
-       /*
-        * program the ICR
-        */
-       cfg = __prepare_ICR(0, vector, APIC_DEST_LOGICAL);
-
-       /*
-        * Send the IPI. The write to APIC_ICR fires this off.
-        */
-       apic_write(APIC_ICR, cfg);
+       __send_IPI_dest_field(mask, vector, APIC_DEST_LOGICAL);
        local_irq_restore(flags);
 }
 
@@ -121,6 +116,7 @@ struct genapic apic_flat =  {
        .int_delivery_mode = dest_LowestPrio,
        .int_dest_mode = (APIC_DEST_LOGICAL != 0),
        .target_cpus = flat_target_cpus,
+       .vector_allocation_domain = flat_vector_allocation_domain,
        .apic_id_registered = flat_apic_id_registered,
        .init_apic_ldr = flat_init_apic_ldr,
        .send_IPI_all = flat_send_IPI_all,
@@ -138,9 +134,17 @@ struct genapic apic_flat =  {
 
 static cpumask_t physflat_target_cpus(void)
 {
-       return cpumask_of_cpu(0);
+       return cpu_online_map;
 }
 
+static cpumask_t physflat_vector_allocation_domain(int cpu)
+{
+       cpumask_t domain = CPU_MASK_NONE;
+       cpu_set(cpu, domain);
+       return domain;
+}
+
+
 static void physflat_send_IPI_mask(cpumask_t cpumask, int vector)
 {
        send_IPI_mask_sequence(cpumask, vector);
@@ -179,6 +183,7 @@ struct genapic apic_physflat =  {
        .int_delivery_mode = dest_Fixed,
        .int_dest_mode = (APIC_DEST_PHYSICAL != 0),
        .target_cpus = physflat_target_cpus,
+       .vector_allocation_domain = physflat_vector_allocation_domain,
        .apic_id_registered = flat_apic_id_registered,
        .init_apic_ldr = flat_init_apic_ldr,/*not needed, but shouldn't hurt*/
        .send_IPI_all = physflat_send_IPI_all,