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authorZhen Lei <thunder.leizhen@huawei.com>2021-12-14 05:01:56 +0100
committerRob Herring <robh@kernel.org>2021-12-22 14:28:26 +0100
commit8347b41748c3019157312fbe7f8a6792ae396eb7 (patch)
tree90f9be930d7c82c2ed61c29e981def7f3a3a909d /drivers/of
parentRevert "kbuild: Enable DT schema checks for %.dtb targets" (diff)
downloadlinux-8347b41748c3019157312fbe7f8a6792ae396eb7.tar.xz
linux-8347b41748c3019157312fbe7f8a6792ae396eb7.zip
of: fdt: Aggregate the processing of "linux,usable-memory-range"
Currently, we parse the "linux,usable-memory-range" property in early_init_dt_scan_chosen(), to obtain the specified memory range of the crash kernel. We then reserve the required memory after early_init_dt_scan_memory() has identified all available physical memory. Because the two pieces of code are separated far, the readability and maintainability are reduced. So bring them together. Suggested-by: Rob Herring <robh@kernel.org> Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com> (change the prototype of early_init_dt_check_for_usable_mem_range(), in order to use it outside) Signed-off-by: Pingfan Liu <kernelfans@gmail.com> Tested-by: Dave Kleikamp <dave.kleikamp@oracle.com> Acked-by: John Donnelly <john.p.donnelly@oracle.com> Reviewed-by: Rob Herring <robh@kernel.org> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will@kernel.org> Cc: linux-arm-kernel@lists.infradead.org To: devicetree@vger.kernel.org To: linux-efi@vger.kernel.org Signed-off-by: Rob Herring <robh@kernel.org>
Diffstat (limited to 'drivers/of')
-rw-r--r--drivers/of/fdt.c19
1 files changed, 13 insertions, 6 deletions
diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index bdca35284ceb..5a238a933eb2 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -965,18 +965,22 @@ static void __init early_init_dt_check_for_elfcorehdr(unsigned long node)
elfcorehdr_addr, elfcorehdr_size);
}
-static phys_addr_t cap_mem_addr;
-static phys_addr_t cap_mem_size;
+static unsigned long chosen_node_offset = -FDT_ERR_NOTFOUND;
/**
* early_init_dt_check_for_usable_mem_range - Decode usable memory range
* location from flat tree
- * @node: reference to node containing usable memory range location ('chosen')
*/
-static void __init early_init_dt_check_for_usable_mem_range(unsigned long node)
+static void __init early_init_dt_check_for_usable_mem_range(void)
{
const __be32 *prop;
int len;
+ phys_addr_t cap_mem_addr;
+ phys_addr_t cap_mem_size;
+ unsigned long node = chosen_node_offset;
+
+ if ((long)node < 0)
+ return;
pr_debug("Looking for usable-memory-range property... ");
@@ -989,6 +993,8 @@ static void __init early_init_dt_check_for_usable_mem_range(unsigned long node)
pr_debug("cap_mem_start=%pa cap_mem_size=%pa\n", &cap_mem_addr,
&cap_mem_size);
+
+ memblock_cap_memory_range(cap_mem_addr, cap_mem_size);
}
#ifdef CONFIG_SERIAL_EARLYCON
@@ -1137,9 +1143,10 @@ int __init early_init_dt_scan_chosen(unsigned long node, const char *uname,
(strcmp(uname, "chosen") != 0 && strcmp(uname, "chosen@0") != 0))
return 0;
+ chosen_node_offset = node;
+
early_init_dt_check_for_initrd(node);
early_init_dt_check_for_elfcorehdr(node);
- early_init_dt_check_for_usable_mem_range(node);
/* Retrieve command line */
p = of_get_flat_dt_prop(node, "bootargs", &l);
@@ -1275,7 +1282,7 @@ void __init early_init_dt_scan_nodes(void)
of_scan_flat_dt(early_init_dt_scan_memory, NULL);
/* Handle linux,usable-memory-range property */
- memblock_cap_memory_range(cap_mem_addr, cap_mem_size);
+ early_init_dt_check_for_usable_mem_range();
}
bool __init early_init_dt_scan(void *params)