From: David Woodhouse <dwmw@amazon.co.uk>
Date: Sun, 24 Nov 2024 15:30:18 +0000 (+0000)
Subject: x86/kexec: Add CONFIG_KEXEC_DEBUG option
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=71ab65a0e5bfc01f502bbbb2e3a253c20c2aa461;p=users%2Fdwmw2%2Flinux.git

x86/kexec: Add CONFIG_KEXEC_DEBUG option

This does nothing yet.

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
---

diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug
index 74777a97e394a..9dde32865a9b2 100644
--- a/arch/x86/Kconfig.debug
+++ b/arch/x86/Kconfig.debug
@@ -56,6 +56,14 @@ config EARLY_PRINTK_USB_XDBC
 	  You should normally say N here, unless you want to debug early
 	  crashes or need a very simple printk logging facility.
 
+config KEXEC_DEBUG
+	bool "Debug kexec transition"
+	depends on KEXEC_CORE && EARLY_PRINTK
+	help
+	  Faults during kexec can be difficult to debug. This installs exception
+	  handlers and attempts to report faults through the same serial port as
+	  used for early_printk.
+
 config EFI_PGT_DUMP
 	bool "Dump the EFI pagetable"
 	depends on EFI