From aeb9267eb6b1df992e39467a620da8fdf434df54 Mon Sep 17 00:00:00 2001 From: Martin Liu Date: Fri, 10 Feb 2023 00:09:55 +0800 Subject: 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 Signed-off-by: Martin Liu Link: https://lore.kernel.org/r/20230209160954.1471909-1-liumartin@google.com Signed-off-by: Rob Herring --- drivers/of/of_reserved_mem.c | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'drivers') diff --git a/drivers/of/of_reserved_mem.c b/drivers/of/of_reserved_mem.c index 65f3b02a0e4e..00e75064ca19 100644 --- a/drivers/of/of_reserved_mem.c +++ b/drivers/of/of_reserved_mem.c @@ -284,6 +284,16 @@ void __init fdt_init_reserved_mem(void) else memblock_phys_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"); } } } -- cgit v1.2.3