From: "Aneesh Kumar K.V" <aneesh.ku...@linux.vnet.ibm.com>
Correctly update the htab_mask using the return value of
KVM_PPC_ALLOCATE_HTAB ioctl. Also we don't update sdr1
on GET_SREGS for HV. So don't update htab_mask if sdr1
is found to be zero. Fix the pte index calculation to be
same as that found in the kernel
Signed-off-by: Aneesh Kumar K.V <aneesh.ku...@linux.vnet.ibm.com>
---
hw/ppc/spapr.c | 8 +++++++-
target-ppc/cpu.h | 1 +
target-ppc/mmu_helper.c | 4 +++-
3 files changed, 11 insertions(+), 2 deletions(-)
diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index 267a47d6cc4d..e99a66170661 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -731,7 +731,13 @@ static void spapr_cpu_reset(void *opaque)
env->external_htab = (uint8_t *)spapr->htab;
env->htab_base = -1;
- env->htab_mask = HTAB_SIZE(spapr) - 1;
+ /*
+ * htab_mask is the mask used to normalize hash value to PTEG index.
+ * htab_shift is log2 of hash table size.
+ * We have 8 hpte per group, and each hpte is 16 bytes.
+ * ie have 128 bytes per hpte entry.
+ */
+ env->htab_mask = (1ULL << ((spapr)->htab_shift - 7)) - 1;
env->spr[SPR_SDR1] = (target_ulong)(uintptr_t)spapr->htab |
(spapr->htab_shift - 18);
}
diff --git a/target-ppc/cpu.h b/target-ppc/cpu.h
index 26acdba847fa..82db9a442be5 100644
--- a/target-ppc/cpu.h
+++ b/target-ppc/cpu.h
@@ -955,6 +955,7 @@ struct CPUPPCState {
#endif
/* segment registers */
hwaddr htab_base;
+ /* mask used to normalize hash value to PTEG index */
hwaddr htab_mask;
target_ulong sr[32];
/* externally stored hash table */
diff --git a/target-ppc/mmu_helper.c b/target-ppc/mmu_helper.c
index 04a840b01697..c39cb7b89ee0 100644
--- a/target-ppc/mmu_helper.c
+++ b/target-ppc/mmu_helper.c
@@ -2025,7 +2025,9 @@ void ppc_store_sdr1(CPUPPCState *env, target_ulong value)
" stored in SDR1\n", htabsize);
htabsize = 28;
}
- env->htab_mask = (1ULL << (htabsize + 18)) - 1;
+ if (htabsize) {
+ env->htab_mask = (1ULL << (htabsize + 18 - 7)) - 1;
+ }
env->htab_base = value & SDR_64_HTABORG;
} else
#endif /* defined(TARGET_PPC64) */
--
1.8.3.2
