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Message-Id: <20210204164135.29856-4-nramas@linux.microsoft.com>
Date: Thu, 4 Feb 2021 08:41:26 -0800
From: Lakshmi Ramasubramanian <nramas@...ux.microsoft.com>
To: zohar@...ux.ibm.com, bauerman@...ux.ibm.com, robh@...nel.org,
takahiro.akashi@...aro.org, gregkh@...uxfoundation.org,
will@...nel.org, joe@...ches.com, catalin.marinas@....com,
mpe@...erman.id.au
Cc: james.morse@....com, sashal@...nel.org, benh@...nel.crashing.org,
paulus@...ba.org, frowand.list@...il.com,
vincenzo.frascino@....com, mark.rutland@....com,
dmitry.kasatkin@...il.com, jmorris@...ei.org, serge@...lyn.com,
pasha.tatashin@...een.com, allison@...utok.net,
masahiroy@...nel.org, bhsharma@...hat.com, mbrugger@...e.com,
hsinyi@...omium.org, tao.li@...o.com, christophe.leroy@....fr,
prsriva@...ux.microsoft.com, balajib@...ux.microsoft.com,
linux-integrity@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH v16 03/12] arm64: Use common of_kexec_setup_new_fdt()
From: Rob Herring <robh@...nel.org>
The code for setting up the /chosen node in the device tree
and updating the memory reservation for the next kernel has been
moved to of_kexec_setup_new_fdt() defined in "drivers/of/kexec.c".
Use the common of_kexec_setup_new_fdt() to setup the device tree
and update the memory reservation for kexec for arm64.
Signed-off-by: Rob Herring <robh@...nel.org>
Reviewed-by: Thiago Jung Bauermann <bauerman@...ux.ibm.com>
Reviewed-by: Lakshmi Ramasubramanian <nramas@...ux.microsoft.com>
Acked-by: Will Deacon <will@...nel.org>
---
arch/arm64/kernel/machine_kexec_file.c | 123 +------------------------
1 file changed, 3 insertions(+), 120 deletions(-)
diff --git a/arch/arm64/kernel/machine_kexec_file.c b/arch/arm64/kernel/machine_kexec_file.c
index 03210f644790..7da22bb7b9d5 100644
--- a/arch/arm64/kernel/machine_kexec_file.c
+++ b/arch/arm64/kernel/machine_kexec_file.c
@@ -15,23 +15,12 @@
#include <linux/kexec.h>
#include <linux/libfdt.h>
#include <linux/memblock.h>
+#include <linux/of.h>
#include <linux/of_fdt.h>
-#include <linux/random.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/types.h>
#include <linux/vmalloc.h>
-#include <asm/byteorder.h>
-
-/* relevant device tree properties */
-#define FDT_PROP_KEXEC_ELFHDR "linux,elfcorehdr"
-#define FDT_PROP_MEM_RANGE "linux,usable-memory-range"
-#define FDT_PROP_INITRD_START "linux,initrd-start"
-#define FDT_PROP_INITRD_END "linux,initrd-end"
-#define FDT_PROP_BOOTARGS "bootargs"
-#define FDT_PROP_KASLR_SEED "kaslr-seed"
-#define FDT_PROP_RNG_SEED "rng-seed"
-#define RNG_SEED_SIZE 128
const struct kexec_file_ops * const kexec_file_loaders[] = {
&kexec_image_ops,
@@ -50,112 +39,6 @@ int arch_kimage_file_post_load_cleanup(struct kimage *image)
return kexec_image_post_load_cleanup_default(image);
}
-static int setup_dtb(struct kimage *image,
- unsigned long initrd_load_addr, unsigned long initrd_len,
- char *cmdline, void *dtb)
-{
- int off, ret;
-
- ret = fdt_path_offset(dtb, "/chosen");
- if (ret < 0)
- goto out;
-
- off = ret;
-
- ret = fdt_delprop(dtb, off, FDT_PROP_KEXEC_ELFHDR);
- if (ret && ret != -FDT_ERR_NOTFOUND)
- goto out;
- ret = fdt_delprop(dtb, off, FDT_PROP_MEM_RANGE);
- if (ret && ret != -FDT_ERR_NOTFOUND)
- goto out;
-
- if (image->type == KEXEC_TYPE_CRASH) {
- /* add linux,elfcorehdr */
- ret = fdt_appendprop_addrrange(dtb, 0, off,
- FDT_PROP_KEXEC_ELFHDR,
- image->arch.elf_headers_mem,
- image->arch.elf_headers_sz);
- if (ret)
- return (ret == -FDT_ERR_NOSPACE ? -ENOMEM : -EINVAL);
-
- /* add linux,usable-memory-range */
- ret = fdt_appendprop_addrrange(dtb, 0, off,
- FDT_PROP_MEM_RANGE,
- crashk_res.start,
- crashk_res.end - crashk_res.start + 1);
- if (ret)
- return (ret == -FDT_ERR_NOSPACE ? -ENOMEM : -EINVAL);
- }
-
- /* add bootargs */
- if (cmdline) {
- ret = fdt_setprop_string(dtb, off, FDT_PROP_BOOTARGS, cmdline);
- if (ret)
- goto out;
- } else {
- ret = fdt_delprop(dtb, off, FDT_PROP_BOOTARGS);
- if (ret && (ret != -FDT_ERR_NOTFOUND))
- goto out;
- }
-
- /* add initrd-* */
- if (initrd_load_addr) {
- ret = fdt_setprop_u64(dtb, off, FDT_PROP_INITRD_START,
- initrd_load_addr);
- if (ret)
- goto out;
-
- ret = fdt_setprop_u64(dtb, off, FDT_PROP_INITRD_END,
- initrd_load_addr + initrd_len);
- if (ret)
- goto out;
- } else {
- ret = fdt_delprop(dtb, off, FDT_PROP_INITRD_START);
- if (ret && (ret != -FDT_ERR_NOTFOUND))
- goto out;
-
- ret = fdt_delprop(dtb, off, FDT_PROP_INITRD_END);
- if (ret && (ret != -FDT_ERR_NOTFOUND))
- goto out;
- }
-
- /* add kaslr-seed */
- ret = fdt_delprop(dtb, off, FDT_PROP_KASLR_SEED);
- if (ret == -FDT_ERR_NOTFOUND)
- ret = 0;
- else if (ret)
- goto out;
-
- if (rng_is_initialized()) {
- u64 seed = get_random_u64();
- ret = fdt_setprop_u64(dtb, off, FDT_PROP_KASLR_SEED, seed);
- if (ret)
- goto out;
- } else {
- pr_notice("RNG is not initialised: omitting \"%s\" property\n",
- FDT_PROP_KASLR_SEED);
- }
-
- /* add rng-seed */
- if (rng_is_initialized()) {
- void *rng_seed;
- ret = fdt_setprop_placeholder(dtb, off, FDT_PROP_RNG_SEED,
- RNG_SEED_SIZE, &rng_seed);
- if (ret)
- goto out;
- get_random_bytes(rng_seed, RNG_SEED_SIZE);
- } else {
- pr_notice("RNG is not initialised: omitting \"%s\" property\n",
- FDT_PROP_RNG_SEED);
- }
-
-out:
- if (ret)
- return (ret == -FDT_ERR_NOSPACE) ? -ENOMEM : -EINVAL;
-
- return 0;
-}
-
/*
* More space needed so that we can add initrd, bootargs, kaslr-seed,
* rng-seed, userable-memory-range and elfcorehdr.
@@ -185,8 +68,8 @@ static int create_dtb(struct kimage *image,
if (ret)
return -EINVAL;
- ret = setup_dtb(image, initrd_load_addr, initrd_len,
- cmdline, buf);
+ ret = of_kexec_setup_new_fdt(image, buf, initrd_load_addr,
+ initrd_len, cmdline);
if (ret) {
vfree(buf);
if (ret == -ENOMEM) {
--
2.30.0
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