From mboxrd@z Thu Jan 1 00:00:00 1970 From: Janosch Frank Subject: [RFC/PATCH 20/22] s390/mm: Enable gmap huge pmd support Date: Mon, 6 Nov 2017 23:29:58 +0100 Message-ID: <1510007400-42493-21-git-send-email-frankja@linux.vnet.ibm.com> References: <1510007400-42493-1-git-send-email-frankja@linux.vnet.ibm.com> Return-path: In-Reply-To: <1510007400-42493-1-git-send-email-frankja@linux.vnet.ibm.com> Sender: kvm-owner@vger.kernel.org List-Archive: List-Post: To: kvm@vger.kernel.org Cc: schwidefsky@de.ibm.com, borntraeger@de.ibm.com, david@redhat.com, dominik.dingel@gmail.com, linux-s390@vger.kernel.org List-ID: Now that we have everything in place, let's allow huge pmds for gmap linking, effectively allowing huge pages guests. Signed-off-by: Janosch Frank Acked-by: Martin Schwidefsky --- arch/s390/mm/gmap.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/arch/s390/mm/gmap.c b/arch/s390/mm/gmap.c index 430dcd9..3cc2765 100644 --- a/arch/s390/mm/gmap.c +++ b/arch/s390/mm/gmap.c @@ -1,8 +1,10 @@ /* * KVM guest address space mapping code * - * Copyright IBM Corp. 2007, 2016 + * Copyright IBM Corp. 2007, 2016, 2017 * Author(s): Martin Schwidefsky + * David Hildenbrand + * Janosch Frank */ #include @@ -596,9 +598,6 @@ int __gmap_link(struct gmap *gmap, unsigned long gaddr, unsigned long vmaddr) return -EFAULT; pmd = pmd_offset(pud, vmaddr); VM_BUG_ON(pmd_none(*pmd)); - /* large pmds cannot yet be handled */ - if (pmd_large(*pmd)) - return -EFAULT; /* Link gmap segment table entry location to page table. */ rc = radix_tree_preload(GFP_KERNEL); if (rc) -- 2.7.4