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From: Baoquan He <bhe@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: Baoquan He <bhe@redhat.com>,
	linux-parisc@vger.kernel.org, x86@kernel.org,
	kexec@lists.infradead.org, conor@kernel.org, nathan@kernel.org,
	joe@perches.com, linux-riscv@lists.infradead.org,
	linuxppc-dev@lists.ozlabs.org, akpm@linux-foundation.org,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH v4 3/7] kexec_file, x86: print out debugging message if required
Date: Wed, 13 Dec 2023 13:57:43 +0800	[thread overview]
Message-ID: <20231213055747.61826-4-bhe@redhat.com> (raw)
In-Reply-To: <20231213055747.61826-1-bhe@redhat.com>

Then when specifying '-d' for kexec_file_load interface, loaded
locations of kernel/initrd/cmdline etc can be printed out to help
debug.

Here replace pr_debug() with the newly added kexec_dprintk() in
kexec_file loading related codes.

And also print out e820 memmap passed to 2nd kernel just as kexec_load
interface has been doing.

Signed-off-by: Baoquan He <bhe@redhat.com>
---
 arch/x86/kernel/crash.c           |  4 ++--
 arch/x86/kernel/kexec-bzimage64.c | 23 ++++++++++++++---------
 2 files changed, 16 insertions(+), 11 deletions(-)

diff --git a/arch/x86/kernel/crash.c b/arch/x86/kernel/crash.c
index c92d88680dbf..1715e5f06a59 100644
--- a/arch/x86/kernel/crash.c
+++ b/arch/x86/kernel/crash.c
@@ -386,8 +386,8 @@ int crash_load_segments(struct kimage *image)
 	if (ret)
 		return ret;
 	image->elf_load_addr = kbuf.mem;
-	pr_debug("Loaded ELF headers at 0x%lx bufsz=0x%lx memsz=0x%lx\n",
-		 image->elf_load_addr, kbuf.bufsz, kbuf.memsz);
+	kexec_dprintk("Loaded ELF headers at 0x%lx bufsz=0x%lx memsz=0x%lx\n",
+		      image->elf_load_addr, kbuf.bufsz, kbuf.memsz);
 
 	return ret;
 }
diff --git a/arch/x86/kernel/kexec-bzimage64.c b/arch/x86/kernel/kexec-bzimage64.c
index a61c12c01270..e9ae0eac6bf9 100644
--- a/arch/x86/kernel/kexec-bzimage64.c
+++ b/arch/x86/kernel/kexec-bzimage64.c
@@ -82,7 +82,7 @@ static int setup_cmdline(struct kimage *image, struct boot_params *params,
 
 	cmdline_ptr[cmdline_len - 1] = '\0';
 
-	pr_debug("Final command line is: %s\n", cmdline_ptr);
+	kexec_dprintk("Final command line is: %s\n", cmdline_ptr);
 	cmdline_ptr_phys = bootparams_load_addr + cmdline_offset;
 	cmdline_low_32 = cmdline_ptr_phys & 0xffffffffUL;
 	cmdline_ext_32 = cmdline_ptr_phys >> 32;
@@ -272,7 +272,12 @@ setup_boot_parameters(struct kimage *image, struct boot_params *params,
 
 	nr_e820_entries = params->e820_entries;
 
+	kexec_dprintk("E820 memmap:\n");
 	for (i = 0; i < nr_e820_entries; i++) {
+		kexec_dprintk("%016llx-%016llx (%d)\n",
+			      params->e820_table[i].addr,
+			      params->e820_table[i].addr + params->e820_table[i].size - 1,
+			      params->e820_table[i].type);
 		if (params->e820_table[i].type != E820_TYPE_RAM)
 			continue;
 		start = params->e820_table[i].addr;
@@ -424,7 +429,7 @@ static void *bzImage64_load(struct kimage *image, char *kernel,
 	 * command line. Make sure it does not overflow
 	 */
 	if (cmdline_len + MAX_ELFCOREHDR_STR_LEN > header->cmdline_size) {
-		pr_debug("Appending elfcorehdr=<addr> to command line exceeds maximum allowed length\n");
+		kexec_dprintk("Appending elfcorehdr=<addr> to command line exceeds maximum allowed length\n");
 		return ERR_PTR(-EINVAL);
 	}
 
@@ -445,7 +450,7 @@ static void *bzImage64_load(struct kimage *image, char *kernel,
 		return ERR_PTR(ret);
 	}
 
-	pr_debug("Loaded purgatory at 0x%lx\n", pbuf.mem);
+	kexec_dprintk("Loaded purgatory at 0x%lx\n", pbuf.mem);
 
 
 	/*
@@ -490,8 +495,8 @@ static void *bzImage64_load(struct kimage *image, char *kernel,
 	if (ret)
 		goto out_free_params;
 	bootparam_load_addr = kbuf.mem;
-	pr_debug("Loaded boot_param, command line and misc at 0x%lx bufsz=0x%lx memsz=0x%lx\n",
-		 bootparam_load_addr, kbuf.bufsz, kbuf.bufsz);
+	kexec_dprintk("Loaded boot_param, command line and misc at 0x%lx bufsz=0x%lx memsz=0x%lx\n",
+		      bootparam_load_addr, kbuf.bufsz, kbuf.bufsz);
 
 	/* Load kernel */
 	kbuf.buffer = kernel + kern16_size;
@@ -505,8 +510,8 @@ static void *bzImage64_load(struct kimage *image, char *kernel,
 		goto out_free_params;
 	kernel_load_addr = kbuf.mem;
 
-	pr_debug("Loaded 64bit kernel at 0x%lx bufsz=0x%lx memsz=0x%lx\n",
-		 kernel_load_addr, kbuf.bufsz, kbuf.memsz);
+	kexec_dprintk("Loaded 64bit kernel at 0x%lx bufsz=0x%lx memsz=0x%lx\n",
+		      kernel_load_addr, kbuf.bufsz, kbuf.memsz);
 
 	/* Load initrd high */
 	if (initrd) {
@@ -520,8 +525,8 @@ static void *bzImage64_load(struct kimage *image, char *kernel,
 			goto out_free_params;
 		initrd_load_addr = kbuf.mem;
 
-		pr_debug("Loaded initrd at 0x%lx bufsz=0x%lx memsz=0x%lx\n",
-				initrd_load_addr, initrd_len, initrd_len);
+		kexec_dprintk("Loaded initrd at 0x%lx bufsz=0x%lx memsz=0x%lx\n",
+			      initrd_load_addr, initrd_len, initrd_len);
 
 		setup_initrd(params, initrd_load_addr, initrd_len);
 	}
-- 
2.41.0


  parent reply	other threads:[~2023-12-13  6:01 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-12-13  5:57 [PATCH v4 0/7] kexec_file: print out debugging message if required Baoquan He
2023-12-13  5:57 ` [PATCH v4 1/7] kexec_file: add kexec_file flag to control debug printing Baoquan He
2024-03-12  9:58   ` kexec verbose dumps with 6.8 [was: [PATCH v4 1/7] kexec_file: add kexec_file flag to control debug printing] Jiri Slaby
2024-03-13  0:48     ` Baoquan He
2024-03-13  5:58       ` Jiri Slaby
2024-03-13  7:10         ` Baoquan He
2023-12-13  5:57 ` [PATCH v4 2/7] kexec_file: print out debugging message if required Baoquan He
2023-12-13  5:57 ` Baoquan He [this message]
2023-12-13  5:57 ` [PATCH v4 4/7] kexec_file, arm64: " Baoquan He
2023-12-13  5:57 ` [PATCH v4 5/7] kexec_file, ricv: " Baoquan He
2023-12-19 14:44   ` Conor Dooley
2023-12-20  4:22     ` Baoquan He
2023-12-20 15:46       ` Andrew Morton
2023-12-20 23:30         ` Baoquan He
2023-12-13  5:57 ` [PATCH v4 6/7] kexec_file, power: " Baoquan He
2023-12-13  5:57 ` [PATCH v4 7/7] kexec_file, parisc: " Baoquan He
2024-01-20 21:09 ` [PATCH v4 0/7] kexec_file: " patchwork-bot+linux-riscv

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