From mboxrd@z Thu Jan 1 00:00:00 1970 From: Greg Kroah-Hartman Subject: [PATCH 4.12 27/84] efi: Process the MEMATTR table only if EFI_MEMMAP is enabled Date: Wed, 19 Jul 2017 11:43:33 +0200 Message-ID: <20170719092323.437018318@linuxfoundation.org> References: <20170719092322.362625377@linuxfoundation.org> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Return-path: In-Reply-To: <20170719092322.362625377@linuxfoundation.org> Sender: linux-kernel-owner@vger.kernel.org To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Daniel Kiper , Ard Biesheuvel , Linus Torvalds , Peter Zijlstra , Thomas Gleixner , andrew.cooper3@citrix.com, boris.ostrovsky@oracle.com, jgross@suse.com, linux-efi@vger.kernel.org, matt@codeblueprint.co.uk, xen-devel@lists.xenproject.org, Ingo Molnar List-Id: linux-efi@vger.kernel.org 4.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Daniel Kiper commit 457ea3f7e97881f937136ce0ba1f29f82b9abdb0 upstream. Otherwise e.g. Xen dom0 on x86_64 EFI platforms crashes. In theory we can check EFI_PARAVIRT too, however, EFI_MEMMAP looks more targeted and covers more cases. Signed-off-by: Daniel Kiper Reviewed-by: Ard Biesheuvel Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: andrew.cooper3@citrix.com Cc: boris.ostrovsky@oracle.com Cc: jgross@suse.com Cc: linux-efi@vger.kernel.org Cc: matt@codeblueprint.co.uk Cc: xen-devel@lists.xenproject.org Link: http://lkml.kernel.org/r/1498128697-12943-2-git-send-email-daniel.kiper@oracle.com Signed-off-by: Ingo Molnar Signed-off-by: Greg Kroah-Hartman --- drivers/firmware/efi/efi.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/drivers/firmware/efi/efi.c +++ b/drivers/firmware/efi/efi.c @@ -528,7 +528,8 @@ int __init efi_config_parse_tables(void } } - efi_memattr_init(); + if (efi_enabled(EFI_MEMMAP)) + efi_memattr_init(); /* Parse the EFI Properties table if it exists */ if (efi.properties_table != EFI_INVALID_TABLE_ADDR) {