From: Thomas Huth <th...@redhat.com>
QEMU currently refuses to start with KVM-PR and only prints out
qemu: fatal: Unknown MMU model 851972
when being started there. This is because commit 4322e8ced5aaac719
("ppc: Fix 64K pages support in full emulation") introduced a new
POWERPC_MMU_64K bit to indicate support for this page size, but
it never gets cleared on KVM-PR if the host kernel does not support
this. Thus we've got to turn off this bit in the mmu_model for KVM-PR.
Signed-off-by: Thomas Huth <th...@redhat.com>
Signed-off-by: David Gibson <da...@gibson.dropbear.id.au>
---
target-ppc/kvm.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/target-ppc/kvm.c b/target-ppc/kvm.c
index c89991c..a18d4d5 100644
--- a/target-ppc/kvm.c
+++ b/target-ppc/kvm.c
@@ -428,6 +428,7 @@ static void kvm_fixup_page_sizes(PowerPCCPU *cpu)
CPUPPCState *env = &cpu->env;
long rampagesize;
int iq, ik, jq, jk;
+ bool has_64k_pages = false;
/* We only handle page sizes for 64-bit server guests for now */
if (!(env->mmu_model & POWERPC_MMU_64)) {
@@ -471,6 +472,9 @@ static void kvm_fixup_page_sizes(PowerPCCPU *cpu)
ksps->enc[jk].page_shift)) {
continue;
}
+ if (ksps->enc[jk].page_shift == 16) {
+ has_64k_pages = true;
+ }
qsps->enc[jq].page_shift = ksps->enc[jk].page_shift;
qsps->enc[jq].pte_enc = ksps->enc[jk].pte_enc;
if (++jq >= PPC_PAGE_SIZES_MAX_SZ) {
@@ -485,6 +489,9 @@ static void kvm_fixup_page_sizes(PowerPCCPU *cpu)
if (!(smmu_info.flags & KVM_PPC_1T_SEGMENTS)) {
env->mmu_model &= ~POWERPC_MMU_1TSEG;
}
+ if (!has_64k_pages) {
+ env->mmu_model &= ~POWERPC_MMU_64K;
+ }
}
#else /* defined (TARGET_PPC64) */
--
2.7.4
