linux-kernel - [PATCH v8 14/17] x86/Kconfig: enable kexec handover for 64 bits

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Message-ID: <20250509074635.3187114-15-changyuanl@google.com>
Date: Fri,  9 May 2025 00:46:32 -0700
From: Changyuan Lyu <changyuanl@...gle.com>
To: akpm@...ux-foundation.org, linux-kernel@...r.kernel.org
Cc: anthony.yznaga@...cle.com, arnd@...db.de, ashish.kalra@....com, 
	benh@...nel.crashing.org, bp@...en8.de, catalin.marinas@....com, 
	corbet@....net, dave.hansen@...ux.intel.com, devicetree@...r.kernel.org, 
	dwmw2@...radead.org, ebiederm@...ssion.com, graf@...zon.com, hpa@...or.com, 
	jgowans@...zon.com, kexec@...ts.infradead.org, krzk@...nel.org, 
	linux-arm-kernel@...ts.infradead.org, linux-doc@...r.kernel.org, 
	linux-mm@...ck.org, luto@...nel.org, mark.rutland@....com, mingo@...hat.com, 
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	thomas.lendacky@....com, will@...nel.org, x86@...nel.org, 
	Changyuan Lyu <changyuanl@...gle.com>
Subject: [PATCH v8 14/17] x86/Kconfig: enable kexec handover for 64 bits

From: Alexander Graf <graf@...zon.com>

Add ARCH_SUPPORTS_KEXEC_HANDOVER for 64 bits to allow enabling of
KEXEC_HANDOVER configuration option.

Signed-off-by: Alexander Graf <graf@...zon.com>
Co-developed-by: Mike Rapoport (Microsoft) <rppt@...nel.org>
Signed-off-by: Mike Rapoport (Microsoft) <rppt@...nel.org>
Co-developed-by: Changyuan Lyu <changyuanl@...gle.com>
Signed-off-by: Changyuan Lyu <changyuanl@...gle.com>
---
 arch/x86/Kconfig | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 4b9f378e05f6b..d1fb81ffdaafa 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -2029,6 +2029,9 @@ config ARCH_SUPPORTS_KEXEC_BZIMAGE_VERIFY_SIG
 config ARCH_SUPPORTS_KEXEC_JUMP
 	def_bool y
 
+config ARCH_SUPPORTS_KEXEC_HANDOVER
+	def_bool X86_64
+
 config ARCH_SUPPORTS_CRASH_DUMP
 	def_bool X86_64 || (X86_32 && HIGHMEM)
 
-- 
2.49.0.1015.ga840276032-goog