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authorDavid Gibson <david@gibson.dropbear.id.au>2016-02-09 09:30:21 +1000
committerDavid Gibson <david@gibson.dropbear.id.au>2016-02-17 09:59:30 +1100
commitfa48b4328c39b2532e47efcfcba6d4031512f514 (patch)
tree7e76cc7defcc6322d6aff7ed9beddf2a2ee17819 /hw/ppc
parentc5f54f3e31bf693f70a98d4d73ea5dbe05689857 (diff)
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target-ppc: Remove hack for ppc_hash64_load_hpte*() with HV KVM
With HV KVM, the guest's hash page table (HPT) is managed by the kernel and not directly accessible to QEMU. This means that spapr->htab is NULL and normally env->external_htab would also be NULL for each cpu. However, that would cause ppc_hash64_load_hpte*() to do the wrong thing in the few cases where QEMU does need to load entries from the in-kernel HPT. Specifically, seeing external_htab is NULL, they would look for an HPT within the guest's address space instead. To stop that we have an ugly hack in the pseries machine type code to set external htab to (void *)1 instead. This patch removes that hack by having ppc_hash64_load_hpte*() explicitly check kvmppc_kern_htab instead, which makes more sense. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Reviewed-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Diffstat (limited to 'hw/ppc')
-rw-r--r--hw/ppc/spapr.c7
1 files changed, 0 insertions, 7 deletions
diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index 907439a..c85a125 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -1197,13 +1197,6 @@ static void spapr_cpu_reset(void *opaque)
env->spr[SPR_HIOR] = 0;
env->external_htab = (uint8_t *)spapr->htab;
- if (kvm_enabled() && !env->external_htab) {
- /*
- * HV KVM, set external_htab to 1 so our ppc_hash64_load_hpte*
- * functions do the right thing.
- */
- env->external_htab = (void *)1;
- }
env->htab_base = -1;
/*
* htab_mask is the mask used to normalize hash value to PTEG index.