diff options
| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2015-10-22 18:30:59 +1100 |
|---|---|---|
| committer | David Gibson <david@gibson.dropbear.id.au> | 2015-10-23 12:22:40 +1100 |
| commit | 90da0d5a703839c8db9f37355107955df043b654 (patch) | |
| tree | d452e0a5e18a1b1d5536ffae695c1348ab618418 /target-ppc/kvm.c | |
| parent | aa4bb58752310e7906683a2ac99566222c1e7228 (diff) | |
ppc/spapr: Add "ibm,pa-features" property to the device-tree
LoPAPR defines a "ibm,pa-features" per-CPU device tree property which
describes extended features of the Processor Architecture.
This adds the property to the device tree. At the moment this is the
copy of what pHyp advertises except "I=1 (cache inhibited) Large Pages"
which is enabled for TCG and disabled when running under HV KVM host
with 4K system page size.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
[aik: rebased, changed commit log, moved ci_large_pages initialization,
renamed pa_features arrays]
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Diffstat (limited to 'target-ppc/kvm.c')
| -rw-r--r-- | target-ppc/kvm.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/target-ppc/kvm.c b/target-ppc/kvm.c index b4af75df68..ac70f0897b 100644 --- a/target-ppc/kvm.c +++ b/target-ppc/kvm.c @@ -414,6 +414,13 @@ static void kvm_fixup_page_sizes(PowerPCCPU *cpu) /* Convert to QEMU form */ memset(&env->sps, 0, sizeof(env->sps)); + /* If we have HV KVM, we need to forbid CI large pages if our + * host page size is smaller than 64K. + */ + if (smmu_info.flags & KVM_PPC_PAGE_SIZES_REAL) { + env->ci_large_pages = getpagesize() >= 0x10000; + } + /* * XXX This loop should be an entry wide AND of the capabilities that * the selected CPU has with the capabilities that KVM supports. |