Context |
Check |
Description |
snowpatch_ozlabs/apply_patch |
warning
|
Failed to apply on branch powerpc/merge (6b450d0404ca83dc131dadffd40c5aa6f7a603af)
|
snowpatch_ozlabs/apply_patch |
warning
|
Failed to apply on branch powerpc/next (612ee81b9461475b5a5612c2e8d71559dd3c7920)
|
snowpatch_ozlabs/apply_patch |
warning
|
Failed to apply on branch linus/master (3b7c59a1950c75f2c0152e5a9cd77675b09233d6)
|
snowpatch_ozlabs/apply_patch |
warning
|
Failed to apply on branch powerpc/fixes (d10f60ae27d26d811e2a1bb39ded47df96d7499f)
|
snowpatch_ozlabs/apply_patch |
success
|
Successfully applied on branch linux-next (f3c452cfc59c817950b150b51ec2b33409d7640b)
|
snowpatch_ozlabs/checkpatch |
fail
|
Test checkpatch on branch linux-next
|
@@ -801,12 +801,14 @@ int kvmppc_book3s_instantiate_page(struct kvm_vcpu *vcpu,
writing, upgrade_p);
if (is_error_noslot_pfn(pfn))
return -EFAULT;
- page = NULL;
- if (pfn_valid(pfn)) {
- page = pfn_to_page(pfn);
- if (PageReserved(page))
- page = NULL;
- }
+ /*
+ * We treat any pages that are not online (not managed by the
+ * buddy) as reserved - this includes ZONE_DEVICE pages and
+ * pages without a memmap (e.g., mapped via /dev/mem).
+ */
+ page = pfn_to_online_page(pfn);
+ if (page && PageReserved(page))
+ page = NULL;
}
/*
Right now, ZONE_DEVICE memory is always set PG_reserved. We want to change that. KVM has this weird use case that you can map anything from /dev/mem into the guest. pfn_valid() is not a reliable check whether the memmap was initialized and can be touched. pfn_to_online_page() makes sure that we have an initialized memmap. Note that ZONE_DEVICE memory is never online (IOW, managed by the buddy). Switching to pfn_to_online_page() keeps the existing behavior for PFNs without a memmap and for ZONE_DEVICE memory. Cc: Paul Mackerras <paulus@ozlabs.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: David Hildenbrand <david@redhat.com> --- arch/powerpc/kvm/book3s_64_mmu_radix.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-)