From 9c3705e41c483c8b0399a2056da226ca28535e07 Mon Sep 17 00:00:00 2001 From: Martin Liu Date: Fri, 10 Feb 2023 00:09:55 +0800 Subject: [PATCH] FROMGIT: of: reserved-mem: print out reserved-mem details during boot It's important to know reserved-mem information in mobile world since reserved memory via device tree keeps increased in platform (e.g., 45% in our platform). Therefore, it's crucial to know the reserved memory sizes breakdown for the memory accounting. This patch prints out reserved memory details during boot to make them visible. Below is an example output: [ 0.000000] OF: reserved mem: 0x00000009f9400000..0x00000009fb3fffff ( 32768 KB ) map reusable test1 [ 0.000000] OF: reserved mem: 0x00000000ffdf0000..0x00000000ffffffff ( 2112 KB ) map non-reusable test2 [ 0.000000] OF: reserved mem: 0x0000000091000000..0x00000000912fffff ( 3072 KB ) nomap non-reusable test3 Bug: 269588564 Change-Id: Idf77b3a9de70ed13c806d3b03d1886b5ae89da62 Signed-off-by: Martin Liu Link: https://lore.kernel.org/r/20230209160954.1471909-1-liumartin@google.com Signed-off-by: Rob Herring (cherry picked from commit aeb9267eb6b1df992e39467a620da8fdf434df54 git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next) --- drivers/of/of_reserved_mem.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/of/of_reserved_mem.c b/drivers/of/of_reserved_mem.c index 1117320ea7d0..6bb58382ee1b 100644 --- a/drivers/of/of_reserved_mem.c +++ b/drivers/of/of_reserved_mem.c @@ -285,6 +285,16 @@ void __init fdt_init_reserved_mem(void) memblock_clear_nomap(rmem->base, rmem->size); else memblock_free(rmem->base, rmem->size); + } else { + phys_addr_t end = rmem->base + rmem->size - 1; + bool reusable = + (of_get_flat_dt_prop(node, "reusable", NULL)) != NULL; + + pr_info("%pa..%pa ( %lu KB ) %s %s %s\n", + &rmem->base, &end, (unsigned long)(rmem->size / SZ_1K), + nomap ? "nomap" : "map", + reusable ? "reusable" : "non-reusable", + rmem->name ? rmem->name : "unknown"); } } }