From 3c6896ad2fb876b0a23202f62a83c0d44380c9ea Mon Sep 17 00:00:00 2001 From: Sughosh Ganu Date: Tue, 15 Oct 2024 21:07:04 +0530 Subject: [PATCH] lmb: add a flag to allow suppressing memory map change notification Add a flag LMB_NONOTIFY that can be passed to the LMB API's for reserving memory. This will then result in no notification being sent from the LMB module for the changes to the LMB's memory map. While here, also add a description of the memory attributes that the flags signify. Signed-off-by: Sughosh Ganu --- include/lmb.h | 3 +++ lib/lmb.c | 2 +- 2 files changed, 4 insertions(+), 1 deletion(-) diff --git a/include/lmb.h b/include/lmb.h index 0e8426f437..ec477c1f51 100644 --- a/include/lmb.h +++ b/include/lmb.h @@ -18,11 +18,14 @@ * enum lmb_flags - definition of memory region attributes * @LMB_NONE: no special request * @LMB_NOMAP: don't add to mmu configuration + * @LMB_NOOVERWRITE: the memory region cannot be overwritten/re-reserved + * @LMB_NONOTIFY: do not notify other modules of changes to this memory region */ enum lmb_flags { LMB_NONE = 0, LMB_NOMAP = BIT(1), LMB_NOOVERWRITE = BIT(2), + LMB_NONOTIFY = BIT(3), }; /** diff --git a/lib/lmb.c b/lib/lmb.c index a38537af9c..e1e616679f 100644 --- a/lib/lmb.c +++ b/lib/lmb.c @@ -30,7 +30,7 @@ static struct lmb lmb; static void lmb_print_region_flags(enum lmb_flags flags) { u64 bitpos; - const char *flag_str[] = { "none", "no-map", "no-overwrite" }; + const char *flag_str[] = { "none", "no-map", "no-overwrite", "no-notify" }; do { bitpos = flags ? fls(flags) - 1 : 0; -- 2.39.5