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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>
This commit is contained in:
Paul Mackerras 2018-06-07 18:08:02 +10:00
parent 4f169d2118
commit db96a04a86
1 changed files with 2 additions and 6 deletions
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8
arch/powerpc/kvm/book3s_pr.c
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@ -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;
}