linux-kernel - [PATCH v2 13/14] riscv, crash: wrap crash dumping code into crash related ifdefs

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Message-ID: <20240119145241.769622-14-bhe@redhat.com>
Date: Fri, 19 Jan 2024 22:52:40 +0800
From: Baoquan He <bhe@...hat.com>
To: linux-kernel@...r.kernel.org
Cc: kexec@...ts.infradead.org,
	x86@...nel.org,
	linux-arm-kernel@...ts.infradead.org,
	linuxppc-dev@...ts.ozlabs.org,
	linux-s390@...r.kernel.org,
	linux-sh@...r.kernel.org,
	linux-mips@...r.kernel.org,
	linux-riscv@...ts.infradead.org,
	loongarch@...ts.linux.dev,
	akpm@...ux-foundation.org,
	ebiederm@...ssion.com,
	hbathini@...ux.ibm.com,
	piliu@...hat.com,
	viro@...iv.linux.org.uk,
	Baoquan He <bhe@...hat.com>
Subject: [PATCH v2 13/14] riscv, crash: wrap crash dumping code into crash related ifdefs

Now crash codes under kernel/ folder has been split out from kexec
code, crash dumping can be separated from kexec reboot in config
items on risc-v with some adjustments.

Here wrap up crash dumping codes with CONFIG_CRASH_DUMP ifdeffery, and
use IS_ENABLED(CONFIG_CRASH_RESERVE) check to decide if compiling
in the crashkernel reservation code.

Signed-off-by: Baoquan He <bhe@...hat.com>
---
 arch/riscv/kernel/elf_kexec.c | 9 +++++++--
 arch/riscv/mm/init.c          | 2 +-
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/arch/riscv/kernel/elf_kexec.c b/arch/riscv/kernel/elf_kexec.c
index 5bd1ec3341fe..54260c16f991 100644
--- a/arch/riscv/kernel/elf_kexec.c
+++ b/arch/riscv/kernel/elf_kexec.c
@@ -117,6 +117,7 @@ static int elf_find_pbase(struct kimage *image, unsigned long kernel_len,
 	return ret;
 }
 
+#ifdef CONFIG_CRASH_DUMP
 static int get_nr_ram_ranges_callback(struct resource *res, void *arg)
 {
 	unsigned int *nr_ranges = arg;
@@ -189,6 +190,7 @@ static char *setup_kdump_cmdline(struct kimage *image, char *cmdline,
 	cmdline_ptr[COMMAND_LINE_SIZE - 1] = '\0';
 	return cmdline_ptr;
 }
+#endif
 
 static void *elf_kexec_load(struct kimage *image, char *kernel_buf,
 			    unsigned long kernel_len, char *initrd,
@@ -196,12 +198,11 @@ static void *elf_kexec_load(struct kimage *image, char *kernel_buf,
 			    unsigned long cmdline_len)
 {
 	int ret;
+	void *fdt;
 	unsigned long old_kernel_pbase = ULONG_MAX;
 	unsigned long new_kernel_pbase = 0UL;
 	unsigned long initrd_pbase = 0UL;
-	unsigned long headers_sz;
 	unsigned long kernel_start;
-	void *fdt, *headers;
 	struct elfhdr ehdr;
 	struct kexec_buf kbuf;
 	struct kexec_elf_info elf_info;
@@ -227,8 +228,11 @@ static void *elf_kexec_load(struct kimage *image, char *kernel_buf,
 	kbuf.buf_min = new_kernel_pbase + kernel_len;
 	kbuf.buf_max = ULONG_MAX;
 
+#ifdef CONFIG_CRASH_DUMP
 	/* Add elfcorehdr */
 	if (image->type == KEXEC_TYPE_CRASH) {
+		void *headers;
+		unsigned long headers_sz;
 		ret = prepare_elf_headers(&headers, &headers_sz);
 		if (ret) {
 			pr_err("Preparing elf core header failed\n");
@@ -264,6 +268,7 @@ static void *elf_kexec_load(struct kimage *image, char *kernel_buf,
 		}
 		cmdline = modified_cmdline;
 	}
+#endif
 
 #ifdef CONFIG_ARCH_SUPPORTS_KEXEC_PURGATORY
 	/* Add purgatory to the image */
diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
index a65937336cdc..f580d1f6ee13 100644
--- a/arch/riscv/mm/init.c
+++ b/arch/riscv/mm/init.c
@@ -1354,7 +1354,7 @@ static void __init arch_reserve_crashkernel(void)
 	bool high = false;
 	int ret;
 
-	if (!IS_ENABLED(CONFIG_KEXEC_CORE))
+	if (!IS_ENABLED(CONFIG_CRASH_RESERVE))
 		return;
 
 	ret = parse_crashkernel(cmdline, memblock_phys_mem_size(),
-- 
2.41.0