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Message-ID: <20250805211527.122367-2-makb@juniper.net>
Date: Tue, 5 Aug 2025 14:15:26 -0700
From: Brian Mak <makb@...iper.net>
To: Baoquan He <bhe@...hat.com>, Dave Young <dyoung@...hat.com>,
Alexander
Graf <graf@...zon.com>,
Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar
<mingo@...hat.com>,
Borislav Petkov <bp@...en8.de>,
Dave Hansen
<dave.hansen@...ux.intel.com>,
"H. Peter Anvin" <hpa@...or.com>,
Andrew
Morton <akpm@...ux-foundation.org>,
Rob Herring <robh@...nel.org>, Saravana
Kannan <saravanak@...gle.com>,
<x86@...nel.org>, <kexec@...ts.infradead.org>,
<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC: Brian Mak <makb@...iper.net>
Subject: [PATCH v2 1/2] kexec: Add KEXEC_FILE_NO_CMA as a legal flag
Commit 07d24902977e ("kexec: enable CMA based contiguous allocation")
introduces logic to use CMA-based allocation in kexec by default. As
part of the changes, it introduces a kexec_file_load flag to disable the
use of CMA allocations from userspace. However, this flag is broken
since it is missing from the list of legal flags for kexec_file_load.
kexec_file_load returns EINVAL when attempting to use the flag.
Fix this by adding the KEXEC_FILE_NO_CMA flag to the list of legal flags
for kexec_file_load.
Fixes: 07d24902977e ("kexec: enable CMA based contiguous allocation")
Signed-off-by: Brian Mak <makb@...iper.net>
---
include/linux/kexec.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/include/linux/kexec.h b/include/linux/kexec.h
index 1b10a5d84b68..39fe3e6cd282 100644
--- a/include/linux/kexec.h
+++ b/include/linux/kexec.h
@@ -460,7 +460,8 @@ bool kexec_load_permitted(int kexec_image_type);
/* List of defined/legal kexec file flags */
#define KEXEC_FILE_FLAGS (KEXEC_FILE_UNLOAD | KEXEC_FILE_ON_CRASH | \
- KEXEC_FILE_NO_INITRAMFS | KEXEC_FILE_DEBUG)
+ KEXEC_FILE_NO_INITRAMFS | KEXEC_FILE_DEBUG | \
+ KEXEC_FILE_NO_CMA)
/* flag to track if kexec reboot is in progress */
extern bool kexec_in_progress;
--
2.25.1
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