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authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>2016-04-29 16:25:43 +0300
committerMichael Ellerman <mpe@ellerman.id.au>2016-05-01 11:32:40 +0300
commit50de596de8be6de75401a2190b90a822e8a1bab2 (patch)
treea09516c1f30162e27bf2d5acd0fc48b24f787433 /arch/powerpc/kvm
parente99833448c5fa198a120db6d7087dd17149dc273 (diff)
downloadlinux-50de596de8be6de75401a2190b90a822e8a1bab2.tar.xz
powerpc/mm/hash: Add support for Power9 Hash
PowerISA 3.0 adds a parition table indexed by LPID. Parition table allows us to specify the MMU model that will be used for guest and host translation. This patch adds support with SLB based hash model (UPRT = 0). What is required with this model is to support the new hash page table entry format and also setup partition table such that we use hash table for address translation. We don't have segment table support yet. In order to make sure we don't load KVM module on Power9 (since we don't have kvm support yet) this patch also disables KVM on Power9. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/kvm')
-rw-r--r--arch/powerpc/kvm/book3s_hv.c6
-rw-r--r--arch/powerpc/kvm/book3s_pr.c6
2 files changed, 11 insertions, 1 deletions
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index 84fb4fcfaa41..4cd37b498fbd 100644
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -3271,6 +3271,12 @@ static int kvmppc_core_check_processor_compat_hv(void)
if (!cpu_has_feature(CPU_FTR_HVMODE) ||
!cpu_has_feature(CPU_FTR_ARCH_206))
return -EIO;
+ /*
+ * Disable KVM for Power9, untill the required bits merged.
+ */
+ if (cpu_has_feature(CPU_FTR_ARCH_300))
+ return -EIO;
+
return 0;
}
diff --git a/arch/powerpc/kvm/book3s_pr.c b/arch/powerpc/kvm/book3s_pr.c
index 95bceca8f40e..ffbaf40b7f31 100644
--- a/arch/powerpc/kvm/book3s_pr.c
+++ b/arch/powerpc/kvm/book3s_pr.c
@@ -1683,7 +1683,11 @@ static void kvmppc_core_destroy_vm_pr(struct kvm *kvm)
static int kvmppc_core_check_processor_compat_pr(void)
{
- /* we are always compatible */
+ /*
+ * Disable KVM for Power9 untill the required bits merged.
+ */
+ if (cpu_has_feature(CPU_FTR_ARCH_300))
+ return -EIO;
return 0;
}