Commit db96a04a authored by Paul Mackerras's avatar Paul Mackerras
Browse files

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: default avatarPaul Mackerras <paulus@ozlabs.org>
parent 4f169d21

arch/powerpc/kvm/book3s_pr.c

+2 −6
Original line number Diff line number Diff line
@@ -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;

}