[POWERPC] Implement SLB shadow buffer

[powerpc.git] / arch / powerpc / kernel / paca.c

diff --git a/arch/powerpc/kernel/paca.c b/arch/powerpc/kernel/paca.c
index c68741f..55f1a25 100644 (file)
--- a/arch/powerpc/kernel/paca.c
+++ b/arch/powerpc/kernel/paca.c
@@ -17,6 +17,7 @@
 #include <asm/lppaca.h>
 #include <asm/iseries/it_lp_reg_save.h>
 #include <asm/paca.h>
+#include <asm/mmu.h>
 
 
 /* This symbol is provided by the linker - let it fill in the paca
@@ -45,6 +46,17 @@ struct lppaca lppaca[] = {
        },
 };
 
+/*
+ * 3 persistent SLBs are registered here.  The buffer will be zero
+ * initially, hence will all be invaild until we actually write them.
+ */
+struct slb_shadow slb_shadow[] __cacheline_aligned = {
+       [0 ... (NR_CPUS-1)] = {
+               .persistent = SLB_NUM_BOLTED,
+               .buffer_length = sizeof(struct slb_shadow),
+       },
+};
+
 /* The Paca is an array with one entry per processor.  Each contains an
  * lppaca, which contains the information shared between the
  * hypervisor and Linux.
@@ -59,7 +71,8 @@ struct lppaca lppaca[] = {
        .lock_token = 0x8000,                                               \
        .paca_index = (number),         /* Paca Index */                    \
        .kernel_toc = (unsigned long)(&__toc_start) + 0x8000UL,             \
-       .hw_cpu_id = 0xffff,
+       .hw_cpu_id = 0xffff,                                                \
+       .slb_shadow_ptr = &slb_shadow[number],
 
 #ifdef CONFIG_PPC_ISERIES
 #define PACA_INIT_ISERIES(number)                                          \