From: Sughosh Ganu <sughosh.ganu@linaro.org>
Date: Tue, 15 Oct 2024 15:37:04 +0000 (+0530)
Subject: lmb: add a flag to allow suppressing memory map change notification
X-Git-Url: http://git.dujemihanovic.xyz/img/%7B%7B%20%24image.RelPermalink%20%7D%7D?a=commitdiff_plain;h=3c6896ad2fb876b0a23202f62a83c0d44380c9ea;p=u-boot.git

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 <sughosh.ganu@linaro.org>
---

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;