This is a note to let you know that I've just added the patch titled
Revert "riscv: kdump: fix crashkernel reserving problem on RISC-V"
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
revert-riscv-kdump-fix-crashkernel-reserving-problem-on-risc-v.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From xingmingzheng@xxxxxxxxxxx Tue Apr 30 09:53:50 2024
From: Mingzheng Xing <xingmingzheng@xxxxxxxxxxx>
Date: Tue, 30 Apr 2024 11:24:03 +0800
Subject: Revert "riscv: kdump: fix crashkernel reserving problem on RISC-V"
To: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>, stable@xxxxxxxxxxxxxxx
Cc: Baoquan He <bhe@xxxxxxxxxx>, Mingzheng Xing <xingmingzheng@xxxxxxxxxxx>, Chen Jiahao <chenjiahao16@xxxxxxxxxx>
Message-ID: <20240430032403.19562-1-xingmingzheng@xxxxxxxxxxx>
From: Mingzheng Xing <xingmingzheng@xxxxxxxxxxx>
This reverts commit 1d6cd2146c2b58bc91266db1d5d6a5f9632e14c0 which was
mistakenly added into v6.6.y and the commit corresponding to the 'Fixes:'
tag is invalid. For more information, see link [1].
This will result in the loss of Crashkernel data in /proc/iomem, and kdump
failed:
```
Memory for crashkernel is not reserved
Please reserve memory by passing"crashkernel=Y@X" parameter to kernel
Then try to loading kdump kernel
```
After revert, kdump works fine. Tested on QEMU riscv.
Link: https://lore.kernel.org/linux-riscv/ZSiQRDGLZk7lpakE@MiWiFi-R3L-srv [1]
Cc: Baoquan He <bhe@xxxxxxxxxx>
Cc: Chen Jiahao <chenjiahao16@xxxxxxxxxx>
Signed-off-by: Mingzheng Xing <xingmingzheng@xxxxxxxxxxx>
Acked-by: Baoquan He <bhe@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/riscv/kernel/setup.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
--- a/arch/riscv/kernel/setup.c
+++ b/arch/riscv/kernel/setup.c
@@ -173,6 +173,19 @@ static void __init init_resources(void)
if (ret < 0)
goto error;
+#ifdef CONFIG_KEXEC_CORE
+ if (crashk_res.start != crashk_res.end) {
+ ret = add_resource(&iomem_resource, &crashk_res);
+ if (ret < 0)
+ goto error;
+ }
+ if (crashk_low_res.start != crashk_low_res.end) {
+ ret = add_resource(&iomem_resource, &crashk_low_res);
+ if (ret < 0)
+ goto error;
+ }
+#endif
+
#ifdef CONFIG_CRASH_DUMP
if (elfcorehdr_size > 0) {
elfcorehdr_res.start = elfcorehdr_addr;
Patches currently in stable-queue which might be from xingmingzheng@xxxxxxxxxxx are
queue-6.6/revert-riscv-kdump-fix-crashkernel-reserving-problem-on-risc-v.patch
