From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756057AbeBOVdV (ORCPT ); Thu, 15 Feb 2018 16:33:21 -0500 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:46214 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752533AbeBOVdT (ORCPT ); Thu, 15 Feb 2018 16:33:19 -0500 From: =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= To: linux-kernel@vger.kernel.org Cc: slp@redhat.com, bhe@redhat.com, mst@redhat.com, somlo@cmu.edu, xiaolong.ye@intel.com, =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= Subject: [PATCH v15 00/11] fw_cfg: add DMA operations & etc/vmcoreinfo support Date: Thu, 15 Feb 2018 22:33:01 +0100 Message-Id: <20180215213312.29234-1-marcandre.lureau@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, This series adds DMA operations support to the qemu fw_cfg kernel module and populates "etc/vmcoreinfo" with vmcoreinfo location details (entry added since qemu 2.11 with -device vmcoreinfo). v15: - fix fw_cfg.h uapi header #include - use BSD license for fw_cfg.h uapi header - move the uapi defines/structs for DMA & vmcoreinfo in the corresponding patch - use cpu_relax() instead of usleep_range(50, 100); - replace do { } while(true) by for (;;) - fix the rmb() call location - add a preliminary patch to handle error from fw_cfg_write_blob() - rewrite fw_cfg_sel_endianness() to wrap iowrite() calls v14: - add "fw_cfg: add a public uapi header" - fix sparse warnings & don't introduce new warnings - add memory barriers to force IO ordering - split fw_cfg_read_blob() in fw_cfg_read_blob_io() and fw_cfg_read_blob_dma() - add error handling to fw_cfg_read_blob() callers - minor stylistic changes v13: - reorder patch series, introduce DMA write before DMA read - do some measurements of DMA read speed-ups v12: - fix virt_to_phys(NULL) panic with CONFIG_DEBUG_VIRTUAL=y - do not use DMA read, except for kmalloc() memory we allocated ourself (only fw_cfg_register_dir_entries() so far) v11: - add #include in last patch, fixing kbuild .config test Marc-André Lureau (11): crash: export paddr_vmcoreinfo_note() fw_cfg: add a public uapi header fw_cfg: fix sparse warnings in fw_cfg_sel_endianness() fw_cfg: fix sparse warnings with fw_cfg_file fw_cfg: fix sparse warning reading FW_CFG_ID fw_cfg: fix sparse warnings around FW_CFG_FILE_DIR read fw_cfg: remove inline from fw_cfg_read_blob() fw_cfg: handle fw_cfg_read_blob() error fw_cfg: add DMA register fw_cfg: write vmcoreinfo details RFC: fw_cfg: do DMA read operation MAINTAINERS | 1 + drivers/firmware/qemu_fw_cfg.c | 334 +++++++++++++++++++++++++++++++++-------- include/uapi/linux/fw_cfg.h | 97 ++++++++++++ kernel/crash_core.c | 1 + 4 files changed, 369 insertions(+), 64 deletions(-) create mode 100644 include/uapi/linux/fw_cfg.h -- 2.16.1.73.g5832b7e9f2