From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751926AbbBRLzt (ORCPT ); Wed, 18 Feb 2015 06:55:49 -0500 Received: from mail-wg0-f49.google.com ([74.125.82.49]:51922 "EHLO mail-wg0-f49.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750851AbbBRLzr (ORCPT ); Wed, 18 Feb 2015 06:55:47 -0500 Date: Wed, 18 Feb 2015 11:55:43 +0000 From: Matt Fleming To: Ingo Molnar , "H. Peter Anvin" , Thomas Gleixner Cc: linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org, Ard Biesheuvel , Andy Lutomirski , Borislav Petkov , Mark Rutland Subject: [GIT PULL] EFI urgent fixes Message-ID: <20150218115543.GA5648@codeblueprint.co.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Folks, please pull the following fixes. The revert addresses a regression that Ard hit when booting Qemu and Xen, and the other patch ensures that we don't triple fault when receiving an NMI or MCE during an EFI mixed mode call, which may happen, for instance, when running perf. The pull is against tip/x86/efi because tip/x86/urgent doesn't contain commit d1a8d66b9177 ("efi/libstub: Call get_memory_map() to obtain map and desc sizes") needed for the revert. If you'd prefer for me to resend this after the merge window closes, just let me know. The following changes since commit 3c01b74e818a7a3b2ee9b0d584cca0bc154a031c: Merge tag 'efi-next' of git://git.kernel.org/pub/scm/linux/kernel/git/mfleming/efi into x86/efi (2015-01-29 19:16:40 +0100) are available in the git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/mfleming/efi.git tags/efi-urgent for you to fetch changes up to 43a9f69692b232d1c64c913a27507eb14a1c47fd: Revert "efi/libstub: Call get_memory_map() to obtain map and desc sizes" (2015-02-18 11:38:13 +0000) ---------------------------------------------------------------- * Leave a valid 64-bit IDT installed during runtime EFI mixed mode calls to avoid triple faults if an NMI/MCE is received. * Revert Ard's change to the libstub get_memory_map() that went into the v3.20 merge window because it causes boot regressions on Qemu and Xen. ---------------------------------------------------------------- Matt Fleming (2): x86/efi: Avoid triple faults during EFI mixed mode calls Revert "efi/libstub: Call get_memory_map() to obtain map and desc sizes" arch/x86/boot/compressed/Makefile | 1 + arch/x86/boot/compressed/efi_stub_64.S | 25 ---- arch/x86/boot/compressed/efi_thunk_64.S | 196 +++++++++++++++++++++++++ arch/x86/platform/efi/efi_stub_64.S | 161 -------------------- arch/x86/platform/efi/efi_thunk_64.S | 121 ++++++++++++--- drivers/firmware/efi/libstub/efi-stub-helper.c | 16 +- 6 files changed, 307 insertions(+), 213 deletions(-) create mode 100644 arch/x86/boot/compressed/efi_thunk_64.S -- Matt Fleming, Intel Open Source Technology Center From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matt Fleming Subject: [GIT PULL] EFI urgent fixes Date: Wed, 18 Feb 2015 11:55:43 +0000 Message-ID: <20150218115543.GA5648@codeblueprint.co.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline Sender: linux-efi-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Ingo Molnar , "H. Peter Anvin" , Thomas Gleixner Cc: linux-efi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Ard Biesheuvel , Andy Lutomirski , Borislav Petkov , Mark Rutland List-Id: linux-efi@vger.kernel.org Folks, please pull the following fixes. The revert addresses a regression that Ard hit when booting Qemu and Xen, and the other patch ensures that we don't triple fault when receiving an NMI or MCE during an EFI mixed mode call, which may happen, for instance, when running perf. The pull is against tip/x86/efi because tip/x86/urgent doesn't contain commit d1a8d66b9177 ("efi/libstub: Call get_memory_map() to obtain map and desc sizes") needed for the revert. If you'd prefer for me to resend this after the merge window closes, just let me know. The following changes since commit 3c01b74e818a7a3b2ee9b0d584cca0bc154a031c: Merge tag 'efi-next' of git://git.kernel.org/pub/scm/linux/kernel/git/mfleming/efi into x86/efi (2015-01-29 19:16:40 +0100) are available in the git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/mfleming/efi.git tags/efi-urgent for you to fetch changes up to 43a9f69692b232d1c64c913a27507eb14a1c47fd: Revert "efi/libstub: Call get_memory_map() to obtain map and desc sizes" (2015-02-18 11:38:13 +0000) ---------------------------------------------------------------- * Leave a valid 64-bit IDT installed during runtime EFI mixed mode calls to avoid triple faults if an NMI/MCE is received. * Revert Ard's change to the libstub get_memory_map() that went into the v3.20 merge window because it causes boot regressions on Qemu and Xen. ---------------------------------------------------------------- Matt Fleming (2): x86/efi: Avoid triple faults during EFI mixed mode calls Revert "efi/libstub: Call get_memory_map() to obtain map and desc sizes" arch/x86/boot/compressed/Makefile | 1 + arch/x86/boot/compressed/efi_stub_64.S | 25 ---- arch/x86/boot/compressed/efi_thunk_64.S | 196 +++++++++++++++++++++++++ arch/x86/platform/efi/efi_stub_64.S | 161 -------------------- arch/x86/platform/efi/efi_thunk_64.S | 121 ++++++++++++--- drivers/firmware/efi/libstub/efi-stub-helper.c | 16 +- 6 files changed, 307 insertions(+), 213 deletions(-) create mode 100644 arch/x86/boot/compressed/efi_thunk_64.S -- Matt Fleming, Intel Open Source Technology Center