[IA64] Add API for allocating Dynamic TR resource.
Dynamic TR resource should be managed in the uniform way.
Add two interfaces for kernel:
ia64_itr_entry: Allocate a (pair of) TR for caller.
ia64_ptr_entry: Purge a (pair of ) TR by caller.
Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com>
Signed-off-by: Anthony Xu <anthony.xu@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
diff --git a/arch/ia64/kernel/mca.c b/arch/ia64/kernel/mca.c
index 6c18221..607006a 100644
--- a/arch/ia64/kernel/mca.c
+++ b/arch/ia64/kernel/mca.c
@@ -97,6 +97,7 @@
#include <asm/irq.h>
#include <asm/hw_irq.h>
+#include <asm/tlb.h>
#include "mca_drv.h"
#include "entry.h"
@@ -112,6 +113,7 @@
DEFINE_PER_CPU(u64, ia64_mca_per_cpu_pte); /* PTE to map per-CPU area */
DEFINE_PER_CPU(u64, ia64_mca_pal_pte); /* PTE to map PAL code */
DEFINE_PER_CPU(u64, ia64_mca_pal_base); /* vaddr PAL code granule */
+DEFINE_PER_CPU(u64, ia64_mca_tr_reload); /* Flag for TR reload */
unsigned long __per_cpu_mca[NR_CPUS];
@@ -1182,6 +1184,49 @@
return;
}
+/* mca_insert_tr
+ *
+ * Switch rid when TR reload and needed!
+ * iord: 1: itr, 2: itr;
+ *
+*/
+static void mca_insert_tr(u64 iord)
+{
+
+ int i;
+ u64 old_rr;
+ struct ia64_tr_entry *p;
+ unsigned long psr;
+ int cpu = smp_processor_id();
+
+ psr = ia64_clear_ic();
+ for (i = IA64_TR_ALLOC_BASE; i < IA64_TR_ALLOC_MAX; i++) {
+ p = &__per_cpu_idtrs[cpu][iord-1][i];
+ if (p->pte & 0x1) {
+ old_rr = ia64_get_rr(p->ifa);
+ if (old_rr != p->rr) {
+ ia64_set_rr(p->ifa, p->rr);
+ ia64_srlz_d();
+ }
+ ia64_ptr(iord, p->ifa, p->itir >> 2);
+ ia64_srlz_i();
+ if (iord & 0x1) {
+ ia64_itr(0x1, i, p->ifa, p->pte, p->itir >> 2);
+ ia64_srlz_i();
+ }
+ if (iord & 0x2) {
+ ia64_itr(0x2, i, p->ifa, p->pte, p->itir >> 2);
+ ia64_srlz_i();
+ }
+ if (old_rr != p->rr) {
+ ia64_set_rr(p->ifa, old_rr);
+ ia64_srlz_d();
+ }
+ }
+ }
+ ia64_set_psr(psr);
+}
+
/*
* ia64_mca_handler
*
@@ -1271,6 +1316,10 @@
monarch_cpu = -1;
#endif
}
+ if (__get_cpu_var(ia64_mca_tr_reload)) {
+ mca_insert_tr(0x1); /*Reload dynamic itrs*/
+ mca_insert_tr(0x2); /*Reload dynamic itrs*/
+ }
if (notify_die(DIE_MCA_MONARCH_LEAVE, "MCA", regs, (long)&nd, 0, recover)
== NOTIFY_STOP)
ia64_mca_spin(__func__);