a5f843f0f2
Provide a -n flag to 'shim debug' so that the setting persists across reboots. Co-developed-by: Claude <noreply@anthropic.com> Signed-off-by: Simon Glass <sjg@chromium.org>
75 lines
1.6 KiB
C
75 lines
1.6 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Control of settings for Shim
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*
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* Copyright 2025 Simon Glass <sjg@chromium.org>
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*/
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#define __efi_runtime
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#include <abuf.h>
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#include <command.h>
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#include <efi.h>
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#include <efi_variable.h>
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#include <errno.h>
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#include <shim.h>
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#include <vsprintf.h>
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static int do_shim_debug(struct cmd_tbl *cmdtp, int flag, int argc,
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char *const argv[])
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{
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efi_status_t eret;
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struct abuf buf;
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const char *sub;
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u32 value;
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u32 attr;
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int ret;
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sub = cmd_arg1(argc, argv);
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if (argc == 1) {
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ret = efi_read_var(SHIM_VERBOSE_VAR_NAME, &efi_shim_lock, &attr,
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&buf, NULL);
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if (ret == -ENOENT) {
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value = 0;
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} else if (ret) {
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printf("Failed to read variable (err=%dE)\n", ret);
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goto fail;
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} else if (buf.size != sizeof(value)) {
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printf("Invalid value size %zd\n", buf.size);
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goto fail;
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} else {
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value = *(typeof(value) *)buf.data;
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}
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printf("%d\n", value);
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} else {
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int arg = 1;
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attr = EFI_VARIABLE_BOOTSERVICE_ACCESS;
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if (!strcmp("-n", argv[arg])) {
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attr |= EFI_VARIABLE_NON_VOLATILE;
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arg++;
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}
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if (arg == argc)
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return CMD_RET_USAGE;
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value = hextoul(argv[arg], NULL) ? 1 : 0;
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eret = efi_set_variable_int(SHIM_VERBOSE_VAR_NAME,
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&efi_shim_lock, attr,
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sizeof(value), &value, false);
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if (eret) {
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printf("Failed to write variable (err=%lx)\n", eret);
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goto fail;
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}
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}
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return 0;
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fail:
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return 1;
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}
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U_BOOT_LONGHELP(shim,
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"debug [[-n] <0/1>] - Enable / disable debug verbose mode");
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U_BOOT_CMD_WITH_SUBCMDS(shim, "Shim utilities", shim_help_text,
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U_BOOT_SUBCMD_MKENT(debug, 3, 1, do_shim_debug));
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