[Qemu-devel] [RFC 9/9] target-ppc: Allow more page sizes for POWER7 & POWER8 in TCG

[David Gibson <david@gibson.dropbear.id.au>]

Now that the TCG and spapr code has been extended to allow (semi-)
arbitrary page encodings in the CPU's 'sps' table, we can add the many
page sizes supported by real POWER7 and POWER8 hardware that we previously
didn't support in TCG.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
---
 target-ppc/mmu-hash64.h     |  2 ++
 target-ppc/translate_init.c | 32 ++++++++++++++++++++++++++++++++
 2 files changed, 34 insertions(+)

diff --git a/target-ppc/mmu-hash64.h b/target-ppc/mmu-hash64.h
index 93d8fb6..1b1695b 100644
--- a/target-ppc/mmu-hash64.h
+++ b/target-ppc/mmu-hash64.h
@@ -47,6 +47,8 @@ unsigned ppc_hash64_hpte_page_shift_noslb(PowerPCCPU *cpu,
 #define SLB_VSID_LLP_MASK       (SLB_VSID_L | SLB_VSID_LP)
 #define SLB_VSID_4K             0x0000000000000000ULL
 #define SLB_VSID_64K            0x0000000000000110ULL
+#define SLB_VSID_16M            0x0000000000000100ULL
+#define SLB_VSID_16G            0x0000000000000120ULL
 
 /*
  * Hash page table definitions
diff --git a/target-ppc/translate_init.c b/target-ppc/translate_init.c
index e88dc7f..c4b70af 100644
--- a/target-ppc/translate_init.c
+++ b/target-ppc/translate_init.c
@@ -8104,6 +8104,36 @@ static Property powerpc_servercpu_properties[] = {
     DEFINE_PROP_END_OF_LIST(),
 };
 
+#ifdef CONFIG_SOFTMMU
+static const struct ppc_segment_page_sizes POWER7_POWER8_sps = {
+    .sps = {
+        {
+            .page_shift = 12, /* 4K */
+            .slb_enc = 0,
+            .enc = { { .page_shift = 12, .pte_enc = 0 },
+                     { .page_shift = 16, .pte_enc = 0x7 },
+                     { .page_shift = 24, .pte_enc = 0x38 }, },
+        },
+        {
+            .page_shift = 16, /* 64K */
+            .slb_enc = SLB_VSID_64K,
+            .enc = { { .page_shift = 16, .pte_enc = 0x1 },
+                     { .page_shift = 24, .pte_enc = 0x8 }, },
+        },
+        {
+            .page_shift = 24, /* 16M */
+            .slb_enc = SLB_VSID_16M,
+            .enc = { { .page_shift = 24, .pte_enc = 0 }, },
+        },
+        {
+            .page_shift = 34, /* 16G */
+            .slb_enc = SLB_VSID_16G,
+            .enc = { { .page_shift = 34, .pte_enc = 0x3 }, },
+        },
+    }
+};
+#endif /* CONFIG_SOFTMMU */
+
 static void init_proc_POWER7 (CPUPPCState *env)
 {
     init_proc_book3s_64(env, BOOK3S_CPU_POWER7);
@@ -8167,6 +8197,7 @@ POWERPC_FAMILY(POWER7)(ObjectClass *oc, void *data)
     pcc->mmu_model = POWERPC_MMU_2_06;
 #if defined(CONFIG_SOFTMMU)
     pcc->handle_mmu_fault = ppc_hash64_handle_mmu_fault;
+    pcc->sps = &POWER7_POWER8_sps;
 #endif
     pcc->excp_model = POWERPC_EXCP_POWER7;
     pcc->bus_model = PPC_FLAGS_INPUT_POWER7;
@@ -8247,6 +8278,7 @@ POWERPC_FAMILY(POWER8)(ObjectClass *oc, void *data)
     pcc->mmu_model = POWERPC_MMU_2_07;
 #if defined(CONFIG_SOFTMMU)
     pcc->handle_mmu_fault = ppc_hash64_handle_mmu_fault;
+    pcc->sps = &POWER7_POWER8_sps;
 #endif
     pcc->excp_model = POWERPC_EXCP_POWER7;
     pcc->bus_model = PPC_FLAGS_INPUT_POWER7;
-- 
2.5.0