[SPARC64]: Register kernel TSB with hypervisor.

We do this right after we take over the trap table from OBP.

Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/arch/sparc64/kernel/smp.c b/arch/sparc64/kernel/smp.c
index f553264588d6eb293a483429ebe7d2091488a522..7d7e02ba297e5682393ed8c9fbda90ccd5fa719e 100644 (file)
--- a/arch/sparc64/kernel/smp.c
+++ b/arch/sparc64/kernel/smp.c
@@ -122,8 +122,10 @@ void __init smp_callin(void)
 
        __local_per_cpu_offset = __per_cpu_offset(cpuid);
 
-       if (tlb_type == hypervisor)
+       if (tlb_type == hypervisor) {
                sun4v_register_fault_status();
+               sun4v_ktsb_register();
+       }
 
        __flush_tlb_all();
 

diff --git a/arch/sparc64/mm/init.c b/arch/sparc64/mm/init.c
index 88eb6f6be5620b2ccefc01816317c016ab774e3e..92756da273bd3cb657b3d7cb5912ff4812eb7303 100644 (file)
--- a/arch/sparc64/mm/init.c
+++ b/arch/sparc64/mm/init.c
@@ -1109,6 +1109,69 @@ static void __init tsb_phys_patch(void)
        }
 }
 
+/* Don't mark as init, we give this to the Hypervisor.  */
+static struct hv_tsb_descr ktsb_descr[2];
+extern struct tsb swapper_tsb[KERNEL_TSB_NENTRIES];
+
+static void __init sun4v_ktsb_init(void)
+{
+       unsigned long ktsb_pa;
+
+       ktsb_pa = kern_base + ((unsigned long)&swapper_tsb[0] - KERNBASE);
+
+       switch (PAGE_SIZE) {
+       case 8 * 1024:
+       default:
+               ktsb_descr[0].pgsz_idx = HV_PGSZ_IDX_8K;
+               ktsb_descr[0].pgsz_mask = HV_PGSZ_MASK_8K;
+               break;
+
+       case 64 * 1024:
+               ktsb_descr[0].pgsz_idx = HV_PGSZ_IDX_64K;
+               ktsb_descr[0].pgsz_mask = HV_PGSZ_MASK_64K;
+               break;
+
+       case 512 * 1024:
+               ktsb_descr[0].pgsz_idx = HV_PGSZ_IDX_512K;
+               ktsb_descr[0].pgsz_mask = HV_PGSZ_MASK_512K;
+               break;
+
+       case 4 * 1024 * 1024:
+               ktsb_descr[0].pgsz_idx = HV_PGSZ_IDX_4MB;
+               ktsb_descr[0].pgsz_mask = HV_PGSZ_MASK_4MB;
+               break;
+       };
+
+       ktsb_descr[0].assoc = 0;
+       ktsb_descr[0].num_ttes = KERNEL_TSB_NENTRIES;
+       ktsb_descr[0].ctx_idx = 0;
+       ktsb_descr[0].tsb_base = ktsb_pa;
+       ktsb_descr[0].resv = 0;
+
+       /* XXX When we have a kernel large page size TSB, describe
+        * XXX it in ktsb_descr[1] here.
+        */
+}
+
+void __cpuinit sun4v_ktsb_register(void)
+{
+       register unsigned long func asm("%o5");
+       register unsigned long arg0 asm("%o0");
+       register unsigned long arg1 asm("%o1");
+       unsigned long pa;
+
+       pa = kern_base + ((unsigned long)&ktsb_descr[0] - KERNBASE);
+
+       func = HV_FAST_MMU_TSB_CTX0;
+       /* XXX set arg0 to 2 when we use ktsb_descr[1], see above XXX */
+       arg0 = 1;
+       arg1 = pa;
+       __asm__ __volatile__("ta        %6"
+                            : "=&r" (func), "=&r" (arg0), "=&r" (arg1)
+                            : "0" (func), "1" (arg0), "2" (arg1),
+                              "i" (HV_FAST_TRAP));
+}
+
 /* paging_init() sets up the page tables */
 
 extern void cheetah_ecache_flush_init(void);
@@ -1129,8 +1192,10 @@ void __init paging_init(void)
            tlb_type == hypervisor)
                tsb_phys_patch();
 
-       if (tlb_type == hypervisor)
+       if (tlb_type == hypervisor) {
                sun4v_patch_tlb_handlers();
+               sun4v_ktsb_init();
+       }
 
        /* Find available physical memory... */
        read_obp_memory("available", &pavail[0], &pavail_ents);
@@ -1171,6 +1236,9 @@ void __init paging_init(void)
 
        __flush_tlb_all();
 
+       if (tlb_type == hypervisor)
+               sun4v_ktsb_register();
+
        /* Setup bootmem... */
        pages_avail = 0;
        last_valid_pfn = end_pfn = bootmem_init(&pages_avail);

diff --git a/include/asm-sparc64/pgtable.h b/include/asm-sparc64/pgtable.h
index c42c06a37d1862877e5f61ff9a6aea43d44f5c52..a480007f0a9d477d4230d0cf9ee41c8ac219c44a 100644 (file)
--- a/include/asm-sparc64/pgtable.h
+++ b/include/asm-sparc64/pgtable.h
@@ -438,6 +438,7 @@ extern unsigned long get_fb_unmapped_area(struct file *filp, unsigned long,
 
 extern void pgtable_cache_init(void);
 extern void sun4v_register_fault_status(void);
+extern void sun4v_ktsb_register(void);
 
 #endif /* !(__ASSEMBLY__) */