powerpc: Separate PACA fields for server CPUs
This patch has no effect other than re-ordering PACA fields on
current server CPUs. It however is a pre-requisite for future
support of BookE 64-bit processors. Various parts of the PACA
struct are now moved under some ifdef's, either the new
CONFIG_PPC_BOOK3S or CONFIG_PPC_STD_MMU_64, whatever seems more
appropriate.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.craashing.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c
index 1e40bc0..ce90c57 100644
--- a/arch/powerpc/kernel/asm-offsets.c
+++ b/arch/powerpc/kernel/asm-offsets.c
@@ -122,8 +122,6 @@
DEFINE(PACAKSAVE, offsetof(struct paca_struct, kstack));
DEFINE(PACACURRENT, offsetof(struct paca_struct, __current));
DEFINE(PACASAVEDMSR, offsetof(struct paca_struct, saved_msr));
- DEFINE(PACASTABREAL, offsetof(struct paca_struct, stab_real));
- DEFINE(PACASTABVIRT, offsetof(struct paca_struct, stab_addr));
DEFINE(PACASTABRR, offsetof(struct paca_struct, stab_rr));
DEFINE(PACAR1, offsetof(struct paca_struct, saved_r1));
DEFINE(PACATOC, offsetof(struct paca_struct, kernel_toc));
@@ -131,35 +129,30 @@
DEFINE(PACAKMSR, offsetof(struct paca_struct, kernel_msr));
DEFINE(PACASOFTIRQEN, offsetof(struct paca_struct, soft_enabled));
DEFINE(PACAHARDIRQEN, offsetof(struct paca_struct, hard_enabled));
- DEFINE(PACASLBCACHE, offsetof(struct paca_struct, slb_cache));
- DEFINE(PACASLBCACHEPTR, offsetof(struct paca_struct, slb_cache_ptr));
DEFINE(PACACONTEXTID, offsetof(struct paca_struct, context.id));
- DEFINE(PACAVMALLOCSLLP, offsetof(struct paca_struct, vmalloc_sllp));
#ifdef CONFIG_PPC_MM_SLICES
DEFINE(PACALOWSLICESPSIZE, offsetof(struct paca_struct,
context.low_slices_psize));
DEFINE(PACAHIGHSLICEPSIZE, offsetof(struct paca_struct,
context.high_slices_psize));
DEFINE(MMUPSIZEDEFSIZE, sizeof(struct mmu_psize_def));
+#endif /* CONFIG_PPC_MM_SLICES */
+#ifdef CONFIG_PPC_STD_MMU_64
+ DEFINE(PACASTABREAL, offsetof(struct paca_struct, stab_real));
+ DEFINE(PACASTABVIRT, offsetof(struct paca_struct, stab_addr));
+ DEFINE(PACASLBCACHE, offsetof(struct paca_struct, slb_cache));
+ DEFINE(PACASLBCACHEPTR, offsetof(struct paca_struct, slb_cache_ptr));
+ DEFINE(PACAVMALLOCSLLP, offsetof(struct paca_struct, vmalloc_sllp));
+#ifdef CONFIG_PPC_MM_SLICES
DEFINE(MMUPSIZESLLP, offsetof(struct mmu_psize_def, sllp));
#else
DEFINE(PACACONTEXTSLLP, offsetof(struct paca_struct, context.sllp));
-
#endif /* CONFIG_PPC_MM_SLICES */
DEFINE(PACA_EXGEN, offsetof(struct paca_struct, exgen));
DEFINE(PACA_EXMC, offsetof(struct paca_struct, exmc));
DEFINE(PACA_EXSLB, offsetof(struct paca_struct, exslb));
- DEFINE(PACAEMERGSP, offsetof(struct paca_struct, emergency_sp));
DEFINE(PACALPPACAPTR, offsetof(struct paca_struct, lppaca_ptr));
- DEFINE(PACAHWCPUID, offsetof(struct paca_struct, hw_cpu_id));
- DEFINE(PACA_STARTPURR, offsetof(struct paca_struct, startpurr));
- DEFINE(PACA_STARTSPURR, offsetof(struct paca_struct, startspurr));
- DEFINE(PACA_USER_TIME, offsetof(struct paca_struct, user_time));
- DEFINE(PACA_SYSTEM_TIME, offsetof(struct paca_struct, system_time));
DEFINE(PACA_SLBSHADOWPTR, offsetof(struct paca_struct, slb_shadow_ptr));
- DEFINE(PACA_DATA_OFFSET, offsetof(struct paca_struct, data_offset));
- DEFINE(PACA_TRAP_SAVE, offsetof(struct paca_struct, trap_save));
-
DEFINE(SLBSHADOW_STACKVSID,
offsetof(struct slb_shadow, save_area[SLB_NUM_BOLTED - 1].vsid));
DEFINE(SLBSHADOW_STACKESID,
@@ -169,6 +162,15 @@
DEFINE(LPPACAANYINT, offsetof(struct lppaca, int_dword.any_int));
DEFINE(LPPACADECRINT, offsetof(struct lppaca, int_dword.fields.decr_int));
DEFINE(SLBSHADOW_SAVEAREA, offsetof(struct slb_shadow, save_area));
+#endif /* CONFIG_PPC_STD_MMU_64 */
+ DEFINE(PACAEMERGSP, offsetof(struct paca_struct, emergency_sp));
+ DEFINE(PACAHWCPUID, offsetof(struct paca_struct, hw_cpu_id));
+ DEFINE(PACA_STARTPURR, offsetof(struct paca_struct, startpurr));
+ DEFINE(PACA_STARTSPURR, offsetof(struct paca_struct, startspurr));
+ DEFINE(PACA_USER_TIME, offsetof(struct paca_struct, user_time));
+ DEFINE(PACA_SYSTEM_TIME, offsetof(struct paca_struct, system_time));
+ DEFINE(PACA_DATA_OFFSET, offsetof(struct paca_struct, data_offset));
+ DEFINE(PACA_TRAP_SAVE, offsetof(struct paca_struct, trap_save));
#endif /* CONFIG_PPC64 */
/* RTAS */
diff --git a/arch/powerpc/kernel/paca.c b/arch/powerpc/kernel/paca.c
index c744b32..e9962c7 100644
--- a/arch/powerpc/kernel/paca.c
+++ b/arch/powerpc/kernel/paca.c
@@ -18,6 +18,8 @@
* field correctly */
extern unsigned long __toc_start;
+#ifdef CONFIG_PPC_BOOK3S
+
/*
* The structure which the hypervisor knows about - this structure
* should not cross a page boundary. The vpa_init/register_vpa call
@@ -41,6 +43,10 @@
},
};
+#endif /* CONFIG_PPC_BOOK3S */
+
+#ifdef CONFIG_PPC_STD_MMU_64
+
/*
* 3 persistent SLBs are registered here. The buffer will be zero
* initially, hence will all be invaild until we actually write them.
@@ -52,6 +58,8 @@
},
};
+#endif /* CONFIG_PPC_STD_MMU_64 */
+
/* The Paca is an array with one entry per processor. Each contains an
* lppaca, which contains the information shared between the
* hypervisor and Linux.
@@ -77,15 +85,19 @@
for (cpu = 0; cpu < NR_CPUS; cpu++) {
struct paca_struct *new_paca = &paca[cpu];
+#ifdef CONFIG_PPC_BOOK3S
new_paca->lppaca_ptr = &lppaca[cpu];
+#endif
new_paca->lock_token = 0x8000;
new_paca->paca_index = cpu;
new_paca->kernel_toc = kernel_toc;
new_paca->kernelbase = (unsigned long) _stext;
new_paca->kernel_msr = MSR_KERNEL;
new_paca->hw_cpu_id = 0xffff;
- new_paca->slb_shadow_ptr = &slb_shadow[cpu];
new_paca->__current = &init_task;
+#ifdef CONFIG_PPC_STD_MMU_64
+ new_paca->slb_shadow_ptr = &slb_shadow[cpu];
+#endif /* CONFIG_PPC_STD_MMU_64 */
}
}
