[PATCH] kexec_file: add kexec_file flag to support debug printing

From: Baoquan He <bhe@redhat.com>
To: kexec@lists.infradead.org
Cc: horms@kernel.org, Baoquan He <bhe@redhat.com>
Subject: [PATCH] kexec_file: add kexec_file flag to support debug printing
Date: Tue, 14 Nov 2023 23:20:30 +0800	[thread overview]
Message-ID: <20231114152030.240945-1-bhe@redhat.com> (raw)

This add KEXEC_FILE_DEBUG to kexec_file_flags so that it can be passed
to kernel when '-d' is added with kexec_file_load interface. With that
flag enabled, kernel can enable the debugging message printing.

Signed-off-by: Baoquan He <bhe@redhat.com>
---
 kexec/kexec-syscall.h | 1 +
 kexec/kexec.c         | 1 +
 2 files changed, 2 insertions(+)

diff --git a/kexec/kexec-syscall.h b/kexec/kexec-syscall.h
index 2559bffb93da..73e52543e1b0 100644
--- a/kexec/kexec-syscall.h
+++ b/kexec/kexec-syscall.h
@@ -119,6 +119,7 @@ static inline long kexec_file_load(int kernel_fd, int initrd_fd,
 #define KEXEC_FILE_UNLOAD	0x00000001
 #define KEXEC_FILE_ON_CRASH	0x00000002
 #define KEXEC_FILE_NO_INITRAMFS	0x00000004
+#define KEXEC_FILE_DEBUG	0x00000008
 
 /* These values match the ELF architecture values. 
  * Unless there is a good reason that should continue to be the case.
diff --git a/kexec/kexec.c b/kexec/kexec.c
index 08edfca2349a..b5393e3b20aa 100644
--- a/kexec/kexec.c
+++ b/kexec/kexec.c
@@ -1477,6 +1477,7 @@ int main(int argc, char *argv[])
 			return 0;
 		case OPT_DEBUG:
 			kexec_debug = 1;
+			kexec_file_flags |= KEXEC_FILE_DEBUG;
 			break;
 		case OPT_NOIFDOWN:
 			skip_ifdown = 1;
-- 
2.41.0


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