From mboxrd@z Thu Jan 1 00:00:00 1970 From: AKASHI Takahiro Date: Thu, 5 Sep 2019 17:21:14 +0900 Subject: [U-Boot] [PATCH v5 00/19] efi_loader: non-volatile variables support Message-ID: <20190905082133.18996-1-takahiro.akashi@linaro.org> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de # In version 5 of this patch set, the implementation is changed again. # # I believe that this is NOT intrusive, and that my approach here is NOT # selfish at all. If Wolfgang doesn't accept this approach, however, # I would like to go for "Plan B" for UEFI variables implementation, in # which EFI will have its own drivers for storage instead of env/*. This patch set is an attempt to implement non-volatile attribute for UEFI variables. Under the current implementation, * SetVariable API doesn't recognize non-volatile attribute * While some variables are defined non-volatile in UEFI specification, they are NOT marked as non-volatile in the code. * env_save() (or "env save" command) allows us to save all the variables into persistent storage, but it may cause volatile UEFI variables, along with irrelevant U-Boot variables, to be saved unconditionally. Those observation rationalizes that the implementation of UEFI variables should be revamped utilizing dedicated storage for them. Basic ideas: * Sub-system users of U-Boot environment variables may have their own "env contexts". More than one contexts allowed. See Patch#2 and Patch#18. * Each context is isolated from other contexts with different name spaces. * Each context is associated with one backing storage driver and media location. * Different contexts may use different drivers and locations. * To access (get or set) a variable, associated context must be presented. So, almost of all existing env interfaces are changed to accept one extra argument, ctx. (I believe that this is Wolfgang's *requirement*.) From viewpoint of APIs, env context is a pointer to opaque structure. * Non-volatile feature is not implemented in a general form and must be implemented by users in their sub-systems. In version 4, U-Boot environment's attributes are extended to support non-volatile (or auto-save capability), but Wolfgang rejected my approach. As modifying attributes for this purpose would cause bunch of incompatibility issues (as far as I said in my cover letter and the discussions in ML), I would prefer a much simple approach. See patch#19 about how it is easily implemented for UEFI variables. * Each backing storage driver must be converted to be aligned with new env interfaces to handle multiple contexts in parallel and provide context-specific Kconfig configurations for driver parameters. In this version, only FAT file system and flash devices are supported, but it is quite straightforward to modify other drivers. See Patch#4 and Patch#5 about how drivers can shift to new interfaces. * Finally, all existing U-Boot variables hold the same semantics as before. Known issues/restriction/TODO: * The current form of patchset is not 'bisect'able. Not to break 'bisect,' all the patches in this patch set must be put into a single commit when merging. (This can be mitigated by modifying/splitting Patch#18/#19 though.) * Unfortunately, this code fails to read U-Boot environment from flash at boot time due to incomprehensible memory corruption. See murky workaround, which is marked as FIXME, in env/flash.c. Despite this bug, I was still be able to run/test my patch by hacking the code with gdb. (modifying data to correct value on the fly :) I hope that it won't affect code review in most places for now. * Some minor issues for better coding. They are also marked as FIXME in the source code. * Only FAT file system and flash are supported. * The whole area of storage will be saved at *every* update of one UEFI variable. It should be optimized if possible. * An error during "save" operation may cause inconsistency between cache (hash table) and the storage. -> This is not UEFI specific though. * Add tests if necessary. * I cannot test all the platforms affected by this patchset. Note: If we need "secure storage" for UEFI variables, efi_get_variable/ efi_get_next_variable_name/efi_set_variable() should be completely replaced with stub functions to communicate with secure world. This patchset has nothing to do with such an implementation. Usage: To enable this feature for example with FAT file system, the following configs must be enabled: CONFIG_ENV_IS_IN_FAT CONFIG_ENV_FAT_INTERFACE CONFIG_ENV_EFI_FAT_DEVICE_AND_PART CONFIG_ENV_EFI_FAT_FILE You may define a non-volatile variable from command interface: => setenv -e -nv FOO baa => printenv -e FOO FOO: NV|BS|RT, DataSize = 0x3 00000000: 62 61 61 baa Patch#1 and #2 are to add multiples 'context' support to env interfaces and to provide new env interfaces. Patch#3 to #5 are to show how the existing drivers for U-Boot environment should be modified to be aligned with new env interfaces. (Only FAT file system and flash in this version of patch set.) Patch#6 to #17 are to shift all the existing users of old env interfaces to new ones. (But not tested for all the platforms.) Patch#18 and #19 are to modify UEFI variable implementation to utilize new env interfaces. Changes in v5 (September 4, 2019) * rebased to v2019.10-rc3 * revamp the implementation, removing changes on environment variable's attributes (See above) Changes in v4 (July 17, 2019) * remove already-merged patches * revamp after Wolfgang's suggestion Changes in v3 (June 4, 2019) * remove already-merged patches * revamp the code again * introduce CONFIG_EFI_VARIABLE_USE_ENV for this configuration. Once another backing storage, i.e. StMM services for secure boot, is supported, another option will be added. Changes in v2 (Apr 24, 2019) * rebased on efi-2019-07 * revamp the implementation v1 (Nov 28, 2018) * initial AKASHI Takahiro (19): env: extend interfaces allowing for env contexts env: define env context for U-Boot environment env: nowhere: rework with new env interfaces env: flash: support multiple env contexts env: fat: support multiple env contexts hashtable: support multiple env contexts api: converted with new env interfaces arch: converted with new env interfaces board: converted with new env interfaces cmd: converted with new env interfaces common: converted with new env interfaces disk: converted with new env interfaces drivers: converted with new env interfaces fs: converted with new env interfaces lib: converted with new env interfaces (except efi_loader) net: converted with new env interfaces post: converted with new env interfaces env,efi_loader: define env context for UEFI variables efi_loader: variable: rework with new env interfaces api/api.c | 8 +- arch/arc/lib/bootm.c 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arch/mips/lib/bootm.c | 6 +- arch/nds32/lib/bootm.c | 4 +- arch/powerpc/cpu/mpc85xx/cpu_init.c | 10 +- arch/powerpc/cpu/mpc85xx/fdt.c | 2 +- arch/powerpc/cpu/mpc85xx/fsl_corenet_serdes.c | 2 +- arch/powerpc/lib/bootm.c | 2 +- arch/sh/lib/bootm.c | 2 +- arch/sh/lib/zimageboot.c | 2 +- arch/x86/lib/zimage.c | 11 +- arch/xtensa/lib/bootm.c | 2 +- board/Arcturus/ucp1020/cmd_arc.c | 40 +- board/Arcturus/ucp1020/ucp1020.c | 16 +- board/BuR/brppt1/board.c | 4 +- board/BuR/brxre1/board.c | 9 +- board/BuR/common/br_resetc.c | 2 +- board/BuR/common/common.c | 47 +- board/BuS/eb_cpu5282/eb_cpu5282.c | 8 +- board/CZ.NIC/turris_mox/turris_mox.c | 4 +- board/CZ.NIC/turris_omnia/turris_omnia.c | 6 +- board/CarMediaLab/flea3/flea3.c | 2 +- board/LaCie/net2big_v2/net2big_v2.c | 2 +- board/LaCie/netspace_v2/netspace_v2.c | 2 +- board/Synology/ds414/cmd_syno.c | 6 +- board/alliedtelesis/x530/x530.c | 2 +- board/amazon/kc1/kc1.c | 4 +- board/amlogic/p200/p200.c | 4 +- board/amlogic/p201/p201.c | 4 +- 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board/freescale/mpc837xerdb/mpc837xerdb.c | 2 +- board/freescale/mx51evk/mx51evk_video.c | 2 +- board/freescale/mx53loco/mx53loco.c | 4 +- board/freescale/mx53loco/mx53loco_video.c | 2 +- board/freescale/mx6sabreauto/mx6sabreauto.c | 8 +- board/freescale/mx6sabresd/mx6sabresd.c | 8 +- board/freescale/mx6sxsabresd/mx6sxsabresd.c | 2 +- .../mx6ul_14x14_evk/mx6ul_14x14_evk.c | 6 +- board/freescale/mx6ullevk/mx6ullevk.c | 4 +- board/freescale/p1_p2_rdb_pc/p1_p2_rdb_pc.c | 2 +- board/freescale/qemu-ppce500/qemu-ppce500.c | 4 +- board/freescale/t4qds/t4240qds.c | 2 +- board/gardena/smart-gateway-at91sam/board.c | 2 +- board/gardena/smart-gateway-mt7688/board.c | 16 +- board/gateworks/gw_ventana/common.c | 2 +- board/gateworks/gw_ventana/gw_ventana.c | 61 +- board/gateworks/gw_ventana/gw_ventana_spl.c | 4 +- board/gdsys/a38x/keyprogram.c | 4 +- board/gdsys/mpc8308/gazerbeam.c | 4 +- board/gdsys/mpc8308/hrcon.c | 2 +- board/gdsys/mpc8308/strider.c | 2 +- board/gdsys/p1022/controlcenterd-id.c | 10 +- board/gdsys/p1022/controlcenterd.c | 2 +- board/ge/bx50v3/bx50v3.c | 13 +- board/ge/common/ge_common.c | 4 +- board/ge/mx53ppd/mx53ppd.c | 2 +- board/grinn/chiliboard/board.c | 4 +- board/grinn/liteboard/board.c | 6 +- board/highbank/highbank.c | 9 +- board/hisilicon/poplar/poplar.c | 2 +- board/imgtec/ci20/ci20.c | 6 +- board/intel/edison/edison.c | 14 +- board/isee/igep003x/board.c | 6 +- board/isee/igep00x0/igep00x0.c | 4 +- board/k+p/kp_imx53/kp_id_rev.c | 20 +- board/k+p/kp_imx53/kp_imx53.c | 4 +- board/k+p/kp_imx6q_tpc/kp_imx6q_tpc.c | 4 +- board/keymile/common/common.c | 26 +- board/keymile/common/ivm.c | 8 +- board/keymile/km83xx/km83xx.c | 2 +- board/keymile/km_arm/km_arm.c | 6 +- board/keymile/kmp204x/kmp204x.c | 4 +- board/kosagi/novena/novena.c | 2 +- board/laird/wb50n/wb50n.c | 2 +- board/lg/sniper/sniper.c | 4 +- board/liebherr/display5/spl.c | 4 +- board/liebherr/mccmon6/mccmon6.c | 6 +- board/logicpd/imx6/imx6logic.c | 8 +- board/menlo/m53menlo/m53menlo.c | 2 +- board/micronas/vct/vct.c | 2 +- board/nokia/rx51/rx51.c | 10 +- board/overo/overo.c | 45 +- board/phytec/pcm052/pcm052.c | 4 +- board/phytec/pfla02/pfla02.c | 2 +- .../dragonboard410c/dragonboard410c.c | 6 +- .../dragonboard820c/dragonboard820c.c | 2 +- board/raspberrypi/rpi/rpi.c | 26 +- board/renesas/alt/alt.c | 3 +- board/renesas/gose/gose.c | 3 +- board/renesas/koelsch/koelsch.c | 3 +- board/renesas/lager/lager.c | 3 +- board/renesas/porter/porter.c | 3 +- board/renesas/sh7752evb/sh7752evb.c | 4 +- board/renesas/sh7753evb/sh7753evb.c | 4 +- board/renesas/sh7757lcr/sh7757lcr.c | 6 +- board/renesas/silk/silk.c | 3 +- board/renesas/stout/stout.c | 3 +- board/rockchip/kylin_rk3036/kylin_rk3036.c | 2 +- board/samsung/common/exynos5-dt.c | 2 +- board/samsung/common/misc.c | 14 +- board/samsung/odroid/odroid.c | 2 +- board/samsung/trats/trats.c | 2 +- board/samsung/universal_c210/universal.c | 2 +- board/samtec/vining_fpga/socfpga.c | 16 +- board/siemens/common/board.c | 4 +- board/siemens/draco/board.c | 6 +- board/siemens/pxm2/board.c | 4 +- board/siemens/rut/board.c | 2 +- board/siemens/taurus/taurus.c | 50 +- board/socrates/socrates.c | 4 +- board/softing/vining_2000/vining_2000.c | 8 +- board/solidrun/mx6cuboxi/mx6cuboxi.c | 16 +- .../stm32f429-discovery/stm32f429-discovery.c | 4 +- .../stm32f429-evaluation.c | 4 +- .../stm32f469-discovery/stm32f469-discovery.c | 4 +- board/st/stm32mp1/stm32mp1.c | 11 +- board/sunxi/board.c | 25 +- board/synopsys/hsdk/env-lib.c | 11 +- board/synopsys/hsdk/hsdk.c | 6 +- board/syteco/zmx25/zmx25.c | 8 +- board/tcl/sl50/board.c | 6 +- .../puma_rk3399/puma-rk3399.c | 8 +- board/ti/am335x/board.c | 18 +- board/ti/am43xx/board.c | 6 +- board/ti/am57xx/board.c | 14 +- board/ti/beagle/beagle.c | 43 +- board/ti/common/board_detect.c | 14 +- board/ti/dra7xx/evm.c | 12 +- board/ti/evm/evm.c | 2 +- board/ti/ks2_evm/board.c | 10 +- board/ti/ks2_evm/board_k2g.c | 8 +- board/ti/panda/panda.c | 4 +- board/toradex/apalis-imx8/apalis-imx8.c | 4 +- board/toradex/apalis_imx6/apalis_imx6.c | 12 +- .../toradex/colibri-imx6ull/colibri-imx6ull.c | 6 +- board/toradex/colibri-imx8x/colibri-imx8x.c | 4 +- board/toradex/colibri_imx6/colibri_imx6.c | 8 +- board/toradex/colibri_vf/colibri_vf.c | 2 +- board/toradex/common/tdx-cfg-block.c | 2 +- board/toradex/common/tdx-common.c | 2 +- board/tqc/tqma6/tqma6.c | 2 +- board/udoo/neo/neo.c | 2 +- board/udoo/udoo.c | 4 +- board/varisys/common/sys_eeprom.c | 6 +- board/vscom/baltos/board.c | 6 +- board/wandboard/wandboard.c | 12 +- board/warp7/warp7.c | 6 +- .../work_92105/work_92105_display.c | 2 +- board/xes/common/board.c | 6 +- board/xilinx/zynq/board.c | 16 +- board/xilinx/zynqmp/cmds.c | 2 +- board/xilinx/zynqmp/zynqmp.c | 24 +- cmd/ab_select.c | 2 +- cmd/avb.c | 2 +- cmd/bdinfo.c | 6 +- cmd/binop.c | 4 +- cmd/bootefi.c | 8 +- cmd/bootm.c | 4 +- cmd/bootmenu.c | 6 +- cmd/cbfs.c | 2 +- cmd/cramfs.c | 8 +- cmd/dtimg.c | 2 +- cmd/elf.c | 29 +- cmd/fdt.c | 22 +- cmd/fpga.c | 4 +- cmd/gpt.c | 8 +- cmd/ini.c | 6 +- cmd/itest.c | 2 +- cmd/jffs2.c | 4 +- cmd/load.c | 10 +- cmd/lzmadec.c | 2 +- cmd/md5sum.c | 4 +- cmd/mtdparts.c | 41 +- cmd/mvebu/bubt.c | 2 +- cmd/nand.c | 12 +- cmd/net.c | 46 +- cmd/nvedit.c | 394 +++++++--- cmd/part.c | 6 +- cmd/pxe.c | 33 +- cmd/qfw.c | 6 +- cmd/reiser.c | 8 +- cmd/setexpr.c | 8 +- cmd/spl.c | 5 +- cmd/ti/ddr3.c | 2 +- cmd/tpm-common.c | 2 +- cmd/tpm-v1.c | 2 +- cmd/trace.c | 18 +- cmd/ubi.c | 2 +- cmd/unzip.c | 2 +- cmd/ximg.c | 4 +- cmd/zfs.c | 6 +- cmd/zip.c | 2 +- common/autoboot.c | 22 +- common/board_f.c | 3 +- common/board_r.c | 10 +- common/bootm.c | 12 +- common/bootm_os.c | 12 +- common/bootretry.c | 2 +- common/cli.c | 2 +- common/cli_hush.c | 14 +- common/cli_simple.c | 2 +- common/command.c | 2 +- common/console.c | 14 +- common/fdt_support.c | 6 +- common/hash.c | 4 +- common/hwconfig.c | 5 +- common/image-android.c | 4 +- common/image-fdt.c | 4 +- common/image.c | 15 +- common/main.c | 5 +- common/spl/spl_dfu.c | 6 +- common/spl/spl_ext.c | 4 +- common/spl/spl_fat.c | 4 +- common/spl/spl_net.c | 4 +- common/splash.c | 4 +- common/splash_source.c | 8 +- common/update.c | 10 +- common/usb_hub.c | 2 +- common/usb_kbd.c | 6 +- disk/part.c | 2 +- disk/part_amiga.c | 4 +- drivers/bootcount/bootcount_env.c | 12 +- drivers/ddr/fsl/fsl_ddr_gen4.c | 2 +- drivers/ddr/fsl/interactive.c | 5 +- drivers/ddr/fsl/options.c | 4 +- drivers/dfu/dfu.c | 6 +- drivers/fastboot/fb_command.c | 4 +- drivers/fastboot/fb_common.c | 2 +- drivers/fastboot/fb_getvar.c | 8 +- drivers/fastboot/fb_mmc.c | 2 +- drivers/input/i8042.c | 2 +- drivers/input/input.c | 2 +- drivers/misc/fs_loader.c | 8 +- drivers/mtd/cfi_flash.c | 2 +- drivers/mtd/mtd_uboot.c | 11 +- drivers/net/fec_mxc.c | 2 +- drivers/net/fm/b4860.c | 3 +- drivers/net/fm/fdt.c | 2 +- drivers/net/fm/fm.c | 4 +- drivers/net/fsl-mc/mc.c | 7 +- drivers/net/netconsole.c | 14 +- drivers/net/phy/micrel_ksz90x1.c | 4 +- drivers/net/sandbox-raw.c | 4 +- drivers/pci/pci.c | 4 +- drivers/pci/pci_common.c | 2 +- drivers/reset/reset-socfpga.c | 2 +- drivers/rtc/m41t60.c | 2 +- drivers/scsi/scsi.c | 2 +- drivers/serial/usbtty.c | 4 +- drivers/usb/gadget/designware_udc.c | 2 +- drivers/usb/gadget/ether.c | 13 +- drivers/usb/gadget/f_dfu.c | 2 +- drivers/usb/gadget/f_fastboot.c | 2 +- drivers/usb/gadget/f_rockusb.c | 2 +- drivers/usb/gadget/f_sdp.c | 2 +- drivers/usb/host/ehci-fsl.c | 2 +- drivers/video/ati_radeon_fb.c | 2 +- drivers/video/cfb_console.c | 2 +- drivers/video/mb862xx.c | 2 +- drivers/video/mx3fb.c | 2 +- drivers/video/mxsfb.c | 2 +- drivers/video/videomodes.c | 4 +- env/Kconfig | 683 +----------------- env/Kconfig.efi | 152 ++++ env/Kconfig.uboot | 671 +++++++++++++++++ env/Makefile | 33 +- env/callback.c | 40 +- env/common.c | 255 ++++--- env/env.c | 158 ++-- env/env_ctx_efi.c | 131 ++++ env/env_ctx_uboot.c | 292 ++++++++ env/fat.c | 102 ++- env/flags.c | 35 +- env/flash.c | 397 ++++++---- env/nowhere.c | 7 +- fs/fs.c | 14 +- fs/ubifs/ubifs.c | 2 +- include/_exports.h | 6 +- include/common.h | 6 +- include/env.h | 114 ++- include/env_internal.h | 89 ++- include/exports.h | 5 +- include/search.h | 6 +- lib/efi_loader/efi_console.c | 2 +- lib/efi_loader/efi_variable.c | 91 ++- lib/fdtdec.c | 2 +- lib/hashtable.c | 14 +- lib/smbios.c | 2 +- lib/uuid.c | 2 +- net/bootp.c | 17 +- net/dns.c | 2 +- net/eth-uclass.c | 6 +- net/eth_common.c | 18 +- net/eth_legacy.c | 2 +- net/link_local.c | 2 +- net/net.c | 11 +- net/tftp.c | 10 +- net/wol.c | 2 +- post/post.c | 2 +- 371 files changed, 3690 insertions(+), 2337 deletions(-) create mode 100644 env/Kconfig.efi create mode 100644 env/Kconfig.uboot create mode 100644 env/env_ctx_efi.c create mode 100644 env/env_ctx_uboot.c -- 2.21.0