KVM: PPC: Book3S PR: Enable use on POWER9 bare-metal hosts in HPT mode
It turns out that PR KVM has no dependency on the format of HPTEs,
because it uses functions pointed to by mmu_hash_ops which do all
the formatting and interpretation of HPTEs. Thus we can allow PR
KVM to load on POWER9 bare-metal hosts as long as they are running
in HPT mode.
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
diff --git a/arch/powerpc/kvm/book3s_pr.c b/arch/powerpc/kvm/book3s_pr.c
index 5c99b84..c3b8006 100644
--- a/arch/powerpc/kvm/book3s_pr.c
+++ b/arch/powerpc/kvm/book3s_pr.c
@@ -2041,13 +2041,9 @@ static int kvmppc_core_check_processor_compat_pr(void)
* PR KVM can work on POWER9 inside a guest partition
* running in HPT mode. It can't work if we are using
* radix translation (because radix provides no way for
- * a process to have unique translations in quadrant 3)
- * or in a bare-metal HPT-mode host (because POWER9
- * uses a modified HPTE format which the PR KVM code
- * has not been adapted to use).
+ * a process to have unique translations in quadrant 3).
*/
- if (cpu_has_feature(CPU_FTR_ARCH_300) &&
- (radix_enabled() || cpu_has_feature(CPU_FTR_HVMODE)))
+ if (cpu_has_feature(CPU_FTR_ARCH_300) && radix_enabled())
return -EIO;
return 0;
}