From: Simon Glass <sjg@chromium.org> Add a few comments about global bootmeths and first_glob_method Fix a broken line in bootmeth_setup_iter_order() while we are here. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de> --- (no changes since v1) boot/bootflow.c | 3 ++- boot/bootmeth-uclass.c | 4 ++-- include/bootflow.h | 3 ++- test/boot/bootflow.c | 2 +- 4 files changed, 7 insertions(+), 5 deletions(-) diff --git a/boot/bootflow.c b/boot/bootflow.c index c8391641001..de1f0c99916 100644 --- a/boot/bootflow.c +++ b/boot/bootflow.c @@ -150,7 +150,7 @@ static void bootflow_iter_set_dev(struct bootflow_iter *iter, if (dev) printf("Scanning bootdev '%s':\n", dev->name); else if (IS_ENABLED(CONFIG_BOOTMETH_GLOBAL) && - ucp->flags & BOOTMETHF_GLOBAL) + ucp->flags & BOOTMETHF_GLOBAL) printf("Scanning global bootmeth '%s':\n", iter->method->name); else @@ -347,6 +347,7 @@ static int bootflow_check(struct bootflow_iter *iter, struct bootflow *bflow) struct udevice *dev; int ret; + /* handle global bootmeths if needed */ if (IS_ENABLED(CONFIG_BOOTMETH_GLOBAL) && iter->doing_global) { bootflow_iter_set_dev(iter, NULL, 0); ret = bootmeth_get_bootflow(iter->method, bflow); diff --git a/boot/bootmeth-uclass.c b/boot/bootmeth-uclass.c index 8c191082cf3..152c334f205 100644 --- a/boot/bootmeth-uclass.c +++ b/boot/bootmeth-uclass.c @@ -147,8 +147,7 @@ int bootmeth_setup_iter_order(struct bootflow_iter *iter, bool include_global) bool is_global; ucp = dev_get_uclass_plat(dev); - is_global = ucp->flags & - BOOTMETHF_GLOBAL; + is_global = ucp->flags & BOOTMETHF_GLOBAL; if (is_global) { iter->first_glob_method = i; break; @@ -193,6 +192,7 @@ int bootmeth_setup_iter_order(struct bootflow_iter *iter, bool include_global) if (!count) return log_msg_ret("count2", -ENOENT); + /* start with the global bootmeths */ if (IS_ENABLED(CONFIG_BOOTMETH_GLOBAL) && include_global && iter->first_glob_method != -1 && iter->first_glob_method != count) { iter->cur_method = iter->first_glob_method; diff --git a/include/bootflow.h b/include/bootflow.h index 284c23c59dd..4d1f888a5a8 100644 --- a/include/bootflow.h +++ b/include/bootflow.h @@ -263,7 +263,8 @@ enum bootflow_meth_flags_t { * @cur_label: Current label being processed * @num_methods: Number of bootmeth devices in @method_order * @cur_method: Current method number, an index into @method_order - * @first_glob_method: First global method, if any, else -1 + * @first_glob_method: Index of first global method within @method_order[], if + * any, else -1 * @cur_prio: Current priority being scanned * @method_order: List of bootmeth devices to use, in order. The normal methods * appear first, then the global ones, if any diff --git a/test/boot/bootflow.c b/test/boot/bootflow.c index 14e3326a08f..be85032985d 100644 --- a/test/boot/bootflow.c +++ b/test/boot/bootflow.c @@ -439,7 +439,7 @@ static int bootflow_system(struct unit_test_state *uts) ut_assertok(device_probe(dev)); sandbox_set_fake_efi_mgr_dev(dev, true); - /* We should get a single 'bootmgr' method right at the end */ + /* We should get a single 'bootmgr' method at the start */ bootstd_clear_glob(); ut_assertok(run_command("bootflow scan -lH", 0)); ut_assert_skip_to_line( -- 2.43.0

From: Simon Glass <sjg@chromium.org> It is helpful in tests to be able to show the bootflow that is being examined. Move show_bootflow() into boot/ and rename it. Signed-off-by: Simon Glass <sjg@chromium.org> --- Changes in v2: - Add a log_err() for an invalid state boot/bootflow.c | 57 ++++++++++++++++++++++++++++++++++++++ cmd/bootflow.c | 68 ++-------------------------------------------- include/bootflow.h | 9 ++++++ 3 files changed, 69 insertions(+), 65 deletions(-) diff --git a/boot/bootflow.c b/boot/bootflow.c index 79be94960e7..de86f196503 100644 --- a/boot/bootflow.c +++ b/boot/bootflow.c @@ -56,6 +56,63 @@ const char *bootflow_state_get_name(enum bootflow_state_t state) return bootflow_state[state]; } +/** + * report_bootflow_err() - Report where a bootflow failed + * + * When a bootflow does not make it to the 'loaded' state, something went wrong. + * Print a helpful message if there is an error + * + * @bflow: Bootflow to process + * @err: Error code (0 if none) + */ +static void report_bootflow_err(struct bootflow *bflow, int err) +{ + if (!err) + return; + + /* Indent out to 'Method' */ + printf(" ** "); + + switch (bflow->state) { + case BOOTFLOWST_BASE: + printf("No media/partition found"); + break; + case BOOTFLOWST_MEDIA: + printf("No partition found"); + break; + case BOOTFLOWST_PART: + printf("No filesystem found"); + break; + case BOOTFLOWST_FS: + printf("File not found"); + break; + case BOOTFLOWST_FILE: + printf("File cannot be loaded"); + break; + case BOOTFLOWST_READY: + printf("Ready"); + break; + case BOOTFLOWST_COUNT: + log_err("Unexpected boot value of bootflow error %d", + bflow->state); + break; + } + + printf(", err=%dE\n", err); +} + +void bootflow_show(int index, struct bootflow *bflow, bool errors) +{ + const char *name = bootflow_guess_label(bflow); + + printf("%3x %-11s %-6s %-9.9s %4x %-25.25s %s\n", index, + bflow->method ? bflow->method->name : "(none)", + bootflow_state_get_name(bflow->state), name, bflow->part, + bflow->name, bflow->fname ?: ""); + if (errors) + report_bootflow_err(bflow, bflow->err); +} + int bootflow_first_glob(struct bootflow **bflowp) { struct bootstd_priv *std; diff --git a/cmd/bootflow.c b/cmd/bootflow.c index 33ed9a1cd73..c9f36a364dd 100644 --- a/cmd/bootflow.c +++ b/cmd/bootflow.c @@ -18,68 +18,6 @@ #include <log.h> #include <mapmem.h> -/** - * report_bootflow_err() - Report where a bootflow failed - * - * When a bootflow does not make it to the 'loaded' state, something went wrong. - * Print a helpful message if there is an error - * - * @bflow: Bootflow to process - * @err: Error code (0 if none) - */ -static void report_bootflow_err(struct bootflow *bflow, int err) -{ - if (!err) - return; - - /* Indent out to 'Method' */ - printf(" ** "); - - switch (bflow->state) { - case BOOTFLOWST_BASE: - printf("No media/partition found"); - break; - case BOOTFLOWST_MEDIA: - printf("No partition found"); - break; - case BOOTFLOWST_PART: - printf("No filesystem found"); - break; - case BOOTFLOWST_FS: - printf("File not found"); - break; - case BOOTFLOWST_FILE: - printf("File cannot be loaded"); - break; - case BOOTFLOWST_READY: - printf("Ready"); - break; - case BOOTFLOWST_COUNT: - break; - } - - printf(", err=%dE\n", err); -} - -/** - * show_bootflow() - Show the status of a bootflow - * - * @seq: Bootflow index - * @bflow: Bootflow to show - * @errors: True to show the error received, if any - */ -static void show_bootflow(int index, struct bootflow *bflow, bool errors) -{ - const char *name = bootflow_guess_label(bflow); - - printf("%3x %-11s %-6s %-9.9s %4x %-25.25s %s\n", index, - bflow->method ? bflow->method->name : "(none)", - bootflow_state_get_name(bflow->state), name, bflow->part, - bflow->name, bflow->fname ?: ""); - if (errors) - report_bootflow_err(bflow, bflow->err); -} - static void show_header(void) { printf("Seq Method State Uclass Part Name Filename\n"); @@ -240,7 +178,7 @@ static int do_bootflow_scan(struct cmd_tbl *cmdtp, int flag, int argc, return CMD_RET_FAILURE; } if (list) - show_bootflow(i, &bflow, errors); + bootflow_show(i, &bflow, errors); if (!menu && boot && !bflow.err) bootflow_run_boot(&iter, &bflow); } @@ -298,7 +236,7 @@ static int do_bootflow_list(struct cmd_tbl *cmdtp, int flag, int argc, !ret; ret = bootdev_next_bootflow(&bflow), i++) { num_valid += bflow->state == BOOTFLOWST_READY; - show_bootflow(i, bflow, errors); + bootflow_show(i, bflow, errors); } } else { printf("Showing all bootflows\n"); @@ -307,7 +245,7 @@ static int do_bootflow_list(struct cmd_tbl *cmdtp, int flag, int argc, !ret; ret = bootflow_next_glob(&bflow), i++) { num_valid += bflow->state == BOOTFLOWST_READY; - show_bootflow(i, bflow, errors); + bootflow_show(i, bflow, errors); } } show_footer(i, num_valid); diff --git a/include/bootflow.h b/include/bootflow.h index 4d1f888a5a8..6f53a7d4991 100644 --- a/include/bootflow.h +++ b/include/bootflow.h @@ -740,4 +740,13 @@ int bootflow_menu_poll(struct expo *exp, int *seqp); */ const char *bootflow_guess_label(const struct bootflow *bflow); +/** + * bootflow_show() - Show the status of a bootflow + * + * @seq: Bootflow index + * @bflow: Bootflow to show + * @errors: True to show the error received, if any + */ +void bootflow_show(int index, struct bootflow *bflow, bool errors); + #endif -- 2.43.0

From: Simon Glass <sjg@chromium.org> For now we only support dropping non-global bootmeths from the iteration. Update first_glob_method in that case and add a few checks that things are correct. Signed-off-by: Simon Glass <sjg@chromium.org> --- (no changes since v1) boot/bootflow.c | 6 ++++++ test/boot/bootflow.c | 8 ++++++++ 2 files changed, 14 insertions(+) diff --git a/boot/bootflow.c b/boot/bootflow.c index de86f196503..dab4397e5eb 100644 --- a/boot/bootflow.c +++ b/boot/bootflow.c @@ -169,11 +169,17 @@ int bootflow_iter_drop_bootmeth(struct bootflow_iter *iter, iter->method_order[iter->cur_method] != bmeth) return -EINVAL; + log_debug("Dropping bootmeth '%s'\n", bmeth->name); + memmove(&iter->method_order[iter->cur_method], &iter->method_order[iter->cur_method + 1], (iter->num_methods - iter->cur_method - 1) * sizeof(void *)); iter->num_methods--; + if (iter->first_glob_method > 0) { + iter->first_glob_method--; + log_debug("first_glob_method %d\n", iter->first_glob_method); + } return 0; } diff --git a/test/boot/bootflow.c b/test/boot/bootflow.c index 69a965dfa4b..7748a5ad534 100644 --- a/test/boot/bootflow.c +++ b/test/boot/bootflow.c @@ -521,7 +521,11 @@ static int bootflow_iter_disable(struct unit_test_state *uts) /* Try to boot the bootmgr flow, which will fail */ console_record_reset_enable(); ut_assertok(bootflow_scan_first(NULL, NULL, &iter, 0, &bflow)); + + /* at this point the global bootmeths are stranded above num_methods */ ut_asserteq(4, iter.num_methods); + ut_assert(!iter.doing_global); + ut_asserteq(4, iter.first_glob_method); ut_asserteq_str("sandbox", iter.method->name); ut_assertok(inject_response(uts)); ut_asserteq(-ENOTSUPP, bootflow_run_boot(&iter, &bflow)); @@ -531,9 +535,13 @@ static int bootflow_iter_disable(struct unit_test_state *uts) /* Check that the sandbox bootmeth has been removed */ ut_asserteq(3, iter.num_methods); + for (i = 0; i < iter.num_methods; i++) ut_assert(strcmp("sandbox", iter.method_order[i]->name)); + /* the first global bootmeth is now down one place in the list */ + ut_asserteq(3, iter.first_glob_method); + return 0; } BOOTSTD_TEST(bootflow_iter_disable, UTF_DM | UTF_SCAN_FDT | UTF_CONSOLE); -- 2.43.0

From: Simon Glass <sjg@chromium.org> Add a bitfield which tracks when bootmeths have been used. This will be needed when global bootmeths can be used later in the iteration. Fix a missing bootflow_free() while here. Signed-off-by: Simon Glass <sjg@chromium.org> --- (no changes since v1) boot/bootflow.c | 13 +++++++++++++ boot/bootmeth-uclass.c | 10 ++++++++++ include/bootflow.h | 8 ++++++++ test/boot/bootflow.c | 8 ++++++++ 4 files changed, 39 insertions(+) diff --git a/boot/bootflow.c b/boot/bootflow.c index dab4397e5eb..4e2a227c807 100644 --- a/boot/bootflow.c +++ b/boot/bootflow.c @@ -18,6 +18,10 @@ #include <dm/device-internal.h> #include <dm/uclass-internal.h> +/* ensure BOOTMETH_MAX_COUNT fits in method_flags field */ +static_assert(BOOTMETH_MAX_COUNT <= + (sizeof(((struct bootflow_iter *)NULL)->method_flags) * 8)); + /* error codes used to signal running out of things */ enum { BF_NO_MORE_PARTS = -ESHUTDOWN, @@ -493,6 +497,10 @@ int bootflow_scan_first(struct udevice *dev, const char *label, bootflow_iter_set_dev(iter, dev, method_flags); } + if (IS_ENABLED(CONFIG_BOOTMETH_GLOBAL)) { + iter->methods_done |= BIT(iter->cur_method); + log_debug("methods_done now %x\n", iter->cur_method); + } ret = bootflow_check(iter, bflow); if (ret) { log_debug("check - ret=%d\n", ret); @@ -520,6 +528,11 @@ int bootflow_scan_next(struct bootflow_iter *iter, struct bootflow *bflow) return log_msg_ret("done", ret); if (!ret) { + if (IS_ENABLED(CONFIG_BOOTMETH_GLOBAL)) { + iter->methods_done |= BIT(iter->cur_method); + log_debug("methods_done now %x\n", + iter->cur_method); + } ret = bootflow_check(iter, bflow); log_debug("check - ret=%d\n", ret); if (!ret) diff --git a/boot/bootmeth-uclass.c b/boot/bootmeth-uclass.c index 0147b97fcb0..d71e4f001f1 100644 --- a/boot/bootmeth-uclass.c +++ b/boot/bootmeth-uclass.c @@ -199,6 +199,16 @@ int bootmeth_setup_iter_order(struct bootflow_iter *iter, bool include_global) iter->doing_global = true; iter->have_global = true; } + + /* + * check we don't exceed the maximum bits in methods_done when tracking + * which global bootmeths have run + */ + if (IS_ENABLED(CONFIG_BOOTMETH_GLOBAL) && count > BOOTMETH_MAX_COUNT) { + free(order); + return log_msg_ret("tmb", -ENOSPC); + } + iter->method_order = order; iter->num_methods = count; diff --git a/include/bootflow.h b/include/bootflow.h index 0805d10e197..051158780e6 100644 --- a/include/bootflow.h +++ b/include/bootflow.h @@ -12,6 +12,7 @@ #include <image.h> #include <dm/ofnode_decl.h> #include <linux/list.h> +#include <linux/build_bug.h> struct bootstd_priv; struct expo; @@ -226,6 +227,10 @@ enum bootflow_meth_flags_t { BOOTFLOW_METHF_SINGLE_UCLASS = 1 << 3, }; +enum { + BOOTMETH_MAX_COUNT = 32, +}; + /** * struct bootflow_iter - state for iterating through bootflows * @@ -273,6 +278,8 @@ enum bootflow_meth_flags_t { * happens before the normal ones) * @method_flags: flags controlling which methods should be used for this @dev * (enum bootflow_meth_flags_t) + * @methods_done: indicates which methods have been processed, one bit for + * each method in @method_order[] */ struct bootflow_iter { int flags; @@ -295,6 +302,7 @@ struct bootflow_iter { bool have_global; bool doing_global; int method_flags; + uint methods_done; }; /** diff --git a/test/boot/bootflow.c b/test/boot/bootflow.c index a18afad0f72..af7f7391160 100644 --- a/test/boot/bootflow.c +++ b/test/boot/bootflow.c @@ -316,6 +316,7 @@ static int bootflow_iter(struct unit_test_state *uts) ut_assert(!iter.doing_global); ut_assert(!iter.have_global); ut_asserteq(-1, iter.first_glob_method); + ut_asserteq(BIT(0), iter.methods_done); /* * This shows MEDIA even though there is none, since in @@ -324,6 +325,7 @@ static int bootflow_iter(struct unit_test_state *uts) * know. */ ut_asserteq(BOOTFLOWST_MEDIA, bflow.state); + bootflow_free(&bflow); ut_asserteq(-EPROTONOSUPPORT, bootflow_scan_next(&iter, &bflow)); ut_asserteq(3, iter.num_methods); @@ -333,6 +335,7 @@ static int bootflow_iter(struct unit_test_state *uts) ut_asserteq_str("efi", iter.method->name); ut_asserteq(0, bflow.err); ut_asserteq(BOOTFLOWST_MEDIA, bflow.state); + ut_asserteq(BIT(0) | BIT(1), iter.methods_done); bootflow_free(&bflow); /* now the VBE boothmeth */ @@ -344,6 +347,7 @@ static int bootflow_iter(struct unit_test_state *uts) ut_asserteq_str("vbe", iter.method->name); ut_asserteq(0, bflow.err); ut_asserteq(BOOTFLOWST_MEDIA, bflow.state); + ut_asserteq(BIT(0) | BIT(1) | BIT(2), iter.methods_done); bootflow_free(&bflow); /* The next device is mmc1.bootdev - at first we use the whole device */ @@ -355,6 +359,7 @@ static int bootflow_iter(struct unit_test_state *uts) ut_asserteq_str("extlinux", iter.method->name); ut_asserteq(0, bflow.err); ut_asserteq(BOOTFLOWST_MEDIA, bflow.state); + ut_asserteq(BIT(0) | BIT(1) | BIT(2), iter.methods_done); bootflow_free(&bflow); ut_asserteq(-ENOENT, bootflow_scan_next(&iter, &bflow)); @@ -365,6 +370,7 @@ static int bootflow_iter(struct unit_test_state *uts) ut_asserteq_str("efi", iter.method->name); ut_asserteq(0, bflow.err); ut_asserteq(BOOTFLOWST_MEDIA, bflow.state); + ut_asserteq(BIT(0) | BIT(1) | BIT(2), iter.methods_done); bootflow_free(&bflow); /* now the VBE boothmeth */ @@ -376,6 +382,7 @@ static int bootflow_iter(struct unit_test_state *uts) ut_asserteq_str("vbe", iter.method->name); ut_asserteq(0, bflow.err); ut_asserteq(BOOTFLOWST_MEDIA, bflow.state); + ut_asserteq(BIT(0) | BIT(1) | BIT(2), iter.methods_done); bootflow_free(&bflow); /* Then move to partition 1 where we find something */ @@ -418,6 +425,7 @@ static int bootflow_iter(struct unit_test_state *uts) ut_asserteq_str("extlinux", iter.method->name); ut_asserteq(0, bflow.err); ut_asserteq(BOOTFLOWST_MEDIA, bflow.state); + ut_asserteq(BIT(0) | BIT(1) | BIT(2), iter.methods_done); bootflow_free(&bflow); bootflow_iter_uninit(&iter); -- 2.43.0

From: Simon Glass <sjg@chromium.org> Add the logic to scan through the global bootmeths for every new bootdev, in preparation for allowing global bootmeths to select where in the hunter ordering they go. Use a new bootmeth_glob_allowed() function to check if a bootmeth is allowed, ensuring that each can run at most once. For now this has no actual effect, since the global bootmeths are unconditionally processed at the start, with iter->methods_done being updated to include all of them. Therefore when scanning again, no unprocessed global bootmeths will be found. Signed-off-by: Simon Glass <sjg@chromium.org> --- (no changes since v1) boot/bootflow.c | 90 ++++++++++++++++++++++++++++++++++++++++++++-- include/bootflow.h | 5 +++ 2 files changed, 93 insertions(+), 2 deletions(-) diff --git a/boot/bootflow.c b/boot/bootflow.c index 488cf7b9a7e..e6f99402d68 100644 --- a/boot/bootflow.c +++ b/boot/bootflow.c @@ -247,19 +247,81 @@ static void scan_next_in_uclass(struct udevice **devp) *devp = dev; } +/** + * bootmeth_glob_allowed() - Check if a global bootmeth is usable at this point + * + * @iter: Bootflow iterator being used + * Return: true if the global bootmeth has not already been used + */ +static bool bootmeth_glob_allowed(struct bootflow_iter *iter, int meth_seq) +{ + struct udevice *meth = iter->method_order[meth_seq]; + bool done = iter->methods_done & BIT(meth_seq); + + log_debug("considering glob '%s': done %d\n", meth->name, done); + + /* if this one has already been used, try the next */ + if (done) + return false; + + return true; +} + +/** + * next_glob_bootmeth() - Find the next global bootmeth to use + * + * Scans the global bootmeths to find the first unused one whose priority has + * been reached. If found, iter->cur_method and iter->method are set up and + * doing_global is set to true + * + * @iter: Bootflow iterator being used + * Return 0 if found, -ENOENT if no more global bootmeths are available + */ +static int next_glob_bootmeth(struct bootflow_iter *iter) +{ + log_debug("rescan global bootmeths have_global %d\n", + iter->have_global); + if (IS_ENABLED(CONFIG_BOOTMETH_GLOBAL) && iter->have_global) { + int i; + + /* rescan the global bootmeths */ + log_debug("first_glob_method %d num_methods %d methods_done %x\n", + iter->first_glob_method, iter->num_methods, + iter->methods_done); + for (i = iter->first_glob_method; i < iter->num_methods; i++) { + if (bootmeth_glob_allowed(iter, i)) { + iter->cur_method = i; + iter->method = iter->method_order[i]; + iter->doing_global = true; + iter->dev = NULL; + return 0; + } + } + } + + return -ENOENT; +} + /** * prepare_bootdev() - Get ready to use a bootdev * * @iter: Bootflow iterator being used * @dev: UCLASS_BOOTDEV device to use * @method_flags: Method flag for the bootdev + * @check_global: true to check global bootmeths before processing @dev * Return 0 if OK, -ve if the bootdev failed to probe */ static int prepare_bootdev(struct bootflow_iter *iter, struct udevice *dev, - int method_flags) + int method_flags, bool check_global) { int ret; + if (check_global && !next_glob_bootmeth(iter)) { + iter->pending_bootdev = dev; + iter->pending_method_flags = method_flags; + return 0; + } + /* * Probe the bootdev. This does not probe any attached block device, * since they are siblings @@ -310,6 +372,30 @@ static int iter_incr(struct bootflow_iter *iter) iter->num_methods = iter->first_glob_method; iter->doing_global = false; + /* + * we've come to the end, so see if we should use a pending + * bootdev from when we decided to rescan the global bootmeths + */ + if (iter->pending_bootdev) { + int meth_flags = iter->pending_method_flags; + + dev = iter->pending_bootdev; + iter->pending_bootdev = NULL; + iter->pending_method_flags = 0; + + ret = prepare_bootdev(iter, dev, meth_flags, false); + if (ret) + return log_msg_ret("ipb", ret); + + iter->cur_method = 0; + iter->method = iter->method_order[iter->cur_method]; + + log_debug("-> using pending bootdev '%s' method '%s'\n", + dev->name, iter->method->name); + + return 0; + } + /* * Don't move to the next dev as we haven't tried this * one yet! @@ -420,7 +506,7 @@ static int iter_incr(struct bootflow_iter *iter) if (ret) bootflow_iter_set_dev(iter, NULL, 0); else - ret = prepare_bootdev(iter, dev, method_flags); + ret = prepare_bootdev(iter, dev, method_flags, true); } /* if there are no more bootdevs, give up */ diff --git a/include/bootflow.h b/include/bootflow.h index 051158780e6..5ef0f4b61d3 100644 --- a/include/bootflow.h +++ b/include/bootflow.h @@ -280,6 +280,9 @@ enum { * (enum bootflow_meth_flags_t) * @methods_done: indicates which methods have been processed, one bit for * each method in @method_order[] + * @pending_bootdev: if non-NULL, bootdev which will be used when the global + * bootmeths are done + * @pending_method_flags: method flags which will be used with @pending_bootdev */ struct bootflow_iter { int flags; @@ -303,6 +306,8 @@ struct bootflow_iter { bool doing_global; int method_flags; uint methods_done; + struct udevice *pending_bootdev; + int pending_method_flags; }; /** -- 2.43.0

From: Simon Glass <sjg@chromium.org> Allow bootmeths to select when they want to run, using the bootdev priority. Provide a new bootmeth_glob_allowed() function which checks if a bootmeth is ready to use. Fix a comment in bootflow_system() which is a test for global bootmeths. Signed-off-by: Simon Glass <sjg@chromium.org> --- (no changes since v1) boot/bootflow.c | 15 +++++++++++---- include/bootflow.h | 2 +- include/bootmeth.h | 4 ++++ 3 files changed, 16 insertions(+), 5 deletions(-) diff --git a/boot/bootflow.c b/boot/bootflow.c index 02b08eec641..bdae861a96c 100644 --- a/boot/bootflow.c +++ b/boot/bootflow.c @@ -251,17 +251,24 @@ static void scan_next_in_uclass(struct udevice **devp) * bootmeth_glob_allowed() - Check if a global bootmeth is usable at this point * * @iter: Bootflow iterator being used - * Return: true if the global bootmeth has not already been used + * Return: true if the global bootmeth has a suitable priority and has not + * already been used */ static bool bootmeth_glob_allowed(struct bootflow_iter *iter, int meth_seq) { struct udevice *meth = iter->method_order[meth_seq]; bool done = iter->methods_done & BIT(meth_seq); + struct bootmeth_uc_plat *ucp; - log_debug("considering glob '%s': done %d\n", meth->name, done); + ucp = dev_get_uclass_plat(meth); + log_debug("considering glob '%s': done %d glob_prio %d\n", meth->name, + done, ucp->glob_prio); - /* if this one has already been used, try the next */ - if (done) + /* + * if this one has already been used, or its priority is too low, try + * the next + */ + if (done || ucp->glob_prio > iter->cur_prio) return false; return true; diff --git a/include/bootflow.h b/include/bootflow.h index 5ef0f4b61d3..351a6539978 100644 --- a/include/bootflow.h +++ b/include/bootflow.h @@ -275,7 +275,7 @@ enum { * appear first, then the global ones, if any * @have_global: true if we have global bootmeths in @method_order[] * @doing_global: true if we are iterating through the global bootmeths (which - * happens before the normal ones) + * generally happens before the normal ones) * @method_flags: flags controlling which methods should be used for this @dev * (enum bootflow_meth_flags_t) * @methods_done: indicates which methods have been processed, one bit for diff --git a/include/bootmeth.h b/include/bootmeth.h index a34bfc91dd5..b5288843d03 100644 --- a/include/bootmeth.h +++ b/include/bootmeth.h @@ -30,10 +30,14 @@ enum bootmeth_flags { * * @desc: A long description of the bootmeth * @flags: Flags for this bootmeth (enum bootmeth_flags) + * @glob_prio: Priority for this bootmeth. If unset (0) the bootmeth is started + * before all other bootmeths. Otherwise it is started before the iteration + * reaches the given priority. */ struct bootmeth_uc_plat { const char *desc; int flags; + enum bootdev_prio_t glob_prio; }; /** struct bootmeth_ops - Operations for boot methods */ -- 2.43.0

From: Simon Glass <sjg@chromium.org> When there are no more bootdevs we should still go through the global bootmeths, since some may not have yet been used, if their priority has not yet come up. Add a final check for this at the end of the iterator. Signed-off-by: Simon Glass <sjg@chromium.org> --- (no changes since v1) boot/bootflow.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/boot/bootflow.c b/boot/bootflow.c index 98d57ef017e..30e0644a09e 100644 --- a/boot/bootflow.c +++ b/boot/bootflow.c @@ -419,6 +419,18 @@ static int iter_incr(struct bootflow_iter *iter) return 0; } + /* if this was the final global bootmeth check, we are done */ + if (iter->cur_prio == BOOTDEVP_COUNT) { + log_debug("-> done global bootmeths\n"); + + /* print the same message as bootflow_iter_set_dev() */ + if ((iter->flags & (BOOTFLOWIF_SHOW | + BOOTFLOWIF_SINGLE_DEV)) == + BOOTFLOWIF_SHOW) + printf("No more bootdevs\n"); + return BF_NO_MORE_DEVICES; + } + /* * Don't move to the next dev as we haven't tried this * one yet! @@ -532,6 +544,17 @@ static int iter_incr(struct bootflow_iter *iter) ret = prepare_bootdev(iter, dev, method_flags, true); } + if (IS_ENABLED(CONFIG_BOOTMETH_GLOBAL) && ret) { + log_debug("no more bootdevs, trying global\n"); + + /* allow global bootmeths with any priority */ + iter->cur_prio = BOOTDEVP_COUNT; + if (!next_glob_bootmeth(iter)) { + log_debug("-> next method '%s'\n", iter->method->name); + return 0; + } + } + /* if there are no more bootdevs, give up */ if (ret) { log_debug("-> no more bootdevs\n"); -- 2.43.0

From: Simon Glass <sjg@chromium.org> Provide some developer documentation on the priority feature for global bootmeths. Signed-off-by: Simon Glass <sjg@chromium.org> --- Changes in v2: - Add a bit more detail suggested by Heinrich doc/develop/bootstd/overview.rst | 40 +++++++++++++++++++++++++++----- 1 file changed, 34 insertions(+), 6 deletions(-) diff --git a/doc/develop/bootstd/overview.rst b/doc/develop/bootstd/overview.rst index ca76bad7bca..208c371bb0e 100644 --- a/doc/develop/bootstd/overview.rst +++ b/doc/develop/bootstd/overview.rst @@ -133,7 +133,8 @@ which scans for available bootflows, optionally listing each find it finds (-l) and trying to boot it (-b). When global bootmeths are available, these are typically checked before the -above bootdev scanning. +above bootdev scanning, but it is possible provide a priority to make them +run later, by setting the glob_prio field in the driver's bind() method. Controlling ordering @@ -614,9 +615,9 @@ simply copied into the iterator. Either way, the `method_order` array it set up, along with `num_methods`. Note that global bootmeths are always put at the end of the ordering. If any are -present, `cur_method` is set to the first one, so that global bootmeths are done -first. Once all have been used, these bootmeths are dropped from the iteration. -When there are no global bootmeths, `cur_method` is set to 0. +present, `cur_method` is set to the first one, so that global bootmeths are +processed first, so long as their priority allows it. Bootstd keeps track of +which global bootmeths have been used, to make sure they are only used once. At this point the iterator is ready to use, with the first bootmeth selected. Most of the other fields are 0. This means that the current partition @@ -716,8 +717,35 @@ to the next partition, or bootdev, for example. The special values `BF_NO_MORE_PARTS` and `BF_NO_MORE_DEVICES` handle this. When `iter_incr` sees `BF_NO_MORE_PARTS` it knows that it should immediately move to the next bootdev. When it sees `BF_NO_MORE_DEVICES` it knows that there is nothing more it can do -so it should immediately return. The caller of `iter_incr()` is responsible for -updating the `err` field, based on the return value it sees. +so it should immediately run any unused global bootmeths and then return. The +caller of `iter_incr()` is responsible for updating the `err` field, based on +the return value it sees. + +Global bootmeths can have a non-zero priority, which indicates where in the +iteration sequence they should run. Each time a new bootdev is produced by a +hunter, all of the global bootmeths are first checked to see if they should run +before this new bootdev. For example, if the bootdev was produced by a hunter +with priority BOOTDEVP_6_NET_BASE, then a quick check is made for global +bootmeths with that priority or less. If there are any, they run before the new +bootdev is processed. + +Assuming they are enabled and the iteration sequence runs right to the end, all +global bootmeths will be used. This is handled by a special case at the end of +iter_incr(), where it processes amy so-far-unused global bootmeths. + +It is important to note the special nature of global bootmeths, with respect to +priority. If there are two normal bootmeths and a global one, the normal ones +are run for each bootdev, but the global one is independent of bootdevs. The +order might be: + + bootdev priority 3: normal-1, normal-3 + global-2, prio 4 + bootdev priority 5: normal-1, normal-3 + +Of course if a specific bootmeth ordering is provided, then this overrides the +default ordering. Global bootmeths must be listed at the end, reflecting their +hybrid nature (they are bootmeths but operate on the system as a whole, not on +a particular bootdev). The above describes the iteration process at a high level. It is basically a very simple increment function with a checker called `bootflow_check()` that -- 2.43.0