From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:60186 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752010AbdKTTOQ (ORCPT ); Mon, 20 Nov 2017 14:14:16 -0500 Subject: Patch "sparc64: Fix page table walk for PUD hugepages" has been added to the 4.14-stable tree To: nitin.m.gupta@oracle.com, davem@davemloft.net, gregkh@linuxfoundation.org, viro@ZenIV.linux.org.uk Cc: , From: Date: Mon, 20 Nov 2017 20:14:21 +0100 Message-ID: <1511205261176148@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled sparc64: Fix page table walk for PUD hugepages to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: 0001-sparc64-Fix-page-table-walk-for-PUD-hugepages.patch and it can be found in the queue-4.14 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From fac33aa62841b69cd0e19a29b0e2ac96e4e8cf32 Mon Sep 17 00:00:00 2001 From: Nitin Gupta Date: Fri, 3 Nov 2017 12:26:06 -0700 Subject: sparc64: Fix page table walk for PUD hugepages From: Nitin Gupta [ Upstream commit 70f3c8b7c2e7ebcdde8354da004872e7c9184e97 ] For a PUD hugepage entry, we need to propagate bits [32:22] from virtual address to resolve at 4M granularity. However, the current code was incorrectly propagating bits [29:19]. This bug can cause incorrect data to be returned for pages backed with 16G hugepages. Signed-off-by: Nitin Gupta Reported-by: Al Viro Cc: Al Viro Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- arch/sparc/include/asm/tsb.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/sparc/include/asm/tsb.h b/arch/sparc/include/asm/tsb.h index 25b6abdb3908..522a677e050d 100644 --- a/arch/sparc/include/asm/tsb.h +++ b/arch/sparc/include/asm/tsb.h @@ -217,7 +217,7 @@ extern struct tsb_phys_patch_entry __tsb_phys_patch, __tsb_phys_patch_end; sllx REG2, 32, REG2; \ andcc REG1, REG2, %g0; \ be,pt %xcc, 700f; \ - sethi %hi(0x1ffc0000), REG2; \ + sethi %hi(0xffe00000), REG2; \ sllx REG2, 1, REG2; \ brgez,pn REG1, FAIL_LABEL; \ andn REG1, REG2, REG1; \ -- 2.13.6 Patches currently in stable-queue which might be from nitin.m.gupta@oracle.com are queue-4.14/0001-sparc64-Fix-page-table-walk-for-PUD-hugepages.patch