powerpc: Add PACA fields specific to 64-bit Book3E processors

This adds various fields in the PACA that are for use specifically
by Book3E processors, such as exception save areas, current pgd
pointer, special exceptions kernel stacks etc...

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 20 insertions, 3 deletions

diff --git a/arch/powerpc/include/asm/paca.h b/arch/powerpc/include/asm/paca.h
index c8a3cbfe02ff..b634456ea893 100644
--- a/arch/powerpc/include/asm/paca.h
+++ b/arch/powerpc/include/asm/paca.h
@@ -14,9 +14,11 @@
 #define _ASM_POWERPC_PACA_H
 #ifdef __KERNEL__
 
-#include        <asm/types.h>
-#include        <asm/lppaca.h>
-#include        <asm/mmu.h>
+#include <asm/types.h>
+#include <asm/lppaca.h>
+#include <asm/mmu.h>
+#include <asm/page.h>
+#include <asm/exception-64e.h>
 
 register struct paca_struct *local_paca asm("r13");
 
@@ -91,6 +93,21 @@ struct paca_struct {
         u16 slb_cache[SLB_CACHE_ENTRIES];
 #endif /* CONFIG_PPC_STD_MMU_64 */
 
+#ifdef CONFIG_PPC_BOOK3E
+        pgd_t *pgd;                     /* Current PGD */
+        pgd_t *kernel_pgd;              /* Kernel PGD */
+        u64 exgen[8] __attribute__((aligned(0x80)));
+        u64 extlb[EX_TLB_SIZE*3] __attribute__((aligned(0x80)));
+        u64 exmc[8];            /* used for machine checks */
+        u64 excrit[8];          /* used for crit interrupts */
+        u64 exdbg[8];           /* used for debug interrupts */
+
+        /* Kernel stack pointers for use by special exceptions */
+        void *mc_kstack;
+        void *crit_kstack;
+        void *dbg_kstack;
+#endif /* CONFIG_PPC_BOOK3E */
+
         mm_context_t context;
 
         /*