From: fangyu.yu@linux.alibaba.com
To: pjw@kernel.org, palmer@dabbelt.com, aou@eecs.berkeley.edu,
alex@ghiti.fr, songshuaishuai@tinylab.org, bjorn@rivosinc.com,
ardb@kernel.org, arnd@arndb.de, bhelgaas@google.com,
richard.lyu@suse.com, tzimmermann@suse.de, nathan@kernel.org
Cc: guoren@kernel.org, kvm-riscv@lists.infradead.org,
linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org,
Fangyu Yu <fangyu.yu@linux.alibaba.com>
Subject: [PATCH 2/4] riscv: kexec: Place norelocate trampoline into .kexec.tramp.text
Date: Tue, 24 Mar 2026 19:45:25 +0800 [thread overview]
Message-ID: <20260324114527.91494-3-fangyu.yu@linux.alibaba.com> (raw)
In-Reply-To: <20260324114527.91494-1-fangyu.yu@linux.alibaba.com>
From: Fangyu Yu <fangyu.yu@linux.alibaba.com>
Move riscv_kexec_norelocate out of the generic .text section and into
a dedicated executable trampoline section, .kexec.tramp.text.
Signed-off-by: Fangyu Yu <fangyu.yu@linux.alibaba.com>
---
arch/riscv/include/asm/kexec.h | 9 +++++++++
arch/riscv/kernel/kexec_relocate.S | 2 +-
2 files changed, 10 insertions(+), 1 deletion(-)
diff --git a/arch/riscv/include/asm/kexec.h b/arch/riscv/include/asm/kexec.h
index b9ee8346cc8c..315dce0d9ca6 100644
--- a/arch/riscv/include/asm/kexec.h
+++ b/arch/riscv/include/asm/kexec.h
@@ -75,4 +75,13 @@ int load_extra_segments(struct kimage *image, unsigned long kernel_start,
unsigned long cmdline_len);
#endif
+#ifndef __ASSEMBLY__
+#ifdef CONFIG_MMU
+#define __kexec_tramp_text __section(".kexec.tramp.text")
+#else
+#define __kexec_tramp_text
+#endif
+#endif
+extern char __kexec_tramp_text_start[];
+
#endif
diff --git a/arch/riscv/kernel/kexec_relocate.S b/arch/riscv/kernel/kexec_relocate.S
index de0a4b35d01e..af6b99f5b0fd 100644
--- a/arch/riscv/kernel/kexec_relocate.S
+++ b/arch/riscv/kernel/kexec_relocate.S
@@ -147,7 +147,7 @@ riscv_kexec_relocate_end:
/* Used for jumping to crashkernel */
-.section ".text"
+.section ".kexec.tramp.text", "ax"
SYM_CODE_START(riscv_kexec_norelocate)
/*
* s0: (const) Phys address to jump to
--
2.50.1
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next prev parent reply other threads:[~2026-03-24 11:47 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-24 11:45 [PATCH 0/4] Add crashdump support in guest kernel fangyu.yu
2026-03-24 11:45 ` [PATCH 1/4] riscv: Add kexec trampoline text section to vmlinux.lds.S fangyu.yu
2026-03-24 11:45 ` fangyu.yu [this message]
2026-03-24 11:45 ` [PATCH 3/4] riscv: kexec: Build trampoline page tables for crash kernel entry fangyu.yu
2026-03-24 11:45 ` [PATCH 4/4] riscv: kexec: Switch to trampoline page table before norelocate fangyu.yu
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