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@xxxxxxxxxx> --- This patch is against my kvm-ppc-next branch. arch/powerpc/kvm/book3s_pr.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) diff --git a/arch/powerpc/kvm/book3s_pr.c b/arch/powerpc/kvm/book3s_pr.c index c36c8ef3dfb0..4f467997f88e 100644 --- a/arch/powerpc/kvm/book3s_pr.c +++ b/arch/powerpc/kvm/book3s_pr.c @@ -2038,13 +2038,9 @@ 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; } -- 2.17.1
