linux-kernel - [PATCH 0/2] x86/tdx: Skip clearing reclaimed pages unless X86_BUG_TDX_PW

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Message-ID: <20250703114038.99270-1-adrian.hunter@intel.com>
Date: Thu,  3 Jul 2025 14:40:36 +0300
From: Adrian Hunter <adrian.hunter@...el.com>
To: Dave Hansen <dave.hansen@...ux.intel.com>,
	pbonzini@...hat.com,
	seanjc@...gle.com,
	vannapurve@...gle.com
Cc: Tony Luck <tony.luck@...el.com>,
	Borislav Petkov <bp@...en8.de>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	x86@...nel.org,
	H Peter Anvin <hpa@...or.com>,
	linux-kernel@...r.kernel.org,
	kvm@...r.kernel.org,
	rick.p.edgecombe@...el.com,
	kirill.shutemov@...ux.intel.com,
	kai.huang@...el.com,
	reinette.chatre@...el.com,
	xiaoyao.li@...el.com,
	tony.lindgren@...ux.intel.com,
	binbin.wu@...ux.intel.com,
	isaku.yamahata@...el.com,
	yan.y.zhao@...el.com,
	chao.gao@...el.com
Subject: [PATCH 0/2] x86/tdx: Skip clearing reclaimed pages unless X86_BUG_TDX_PW_MCE is present

Hi

Here are 2 small self-explanatory patches related to clearing TDX private
pages.

Patch 1 is a minor tidy-up.

In patch 2, by skipping the clearing step, shutdown time can improve by
up to 40%.


Adrian Hunter (2):
      x86/tdx: Eliminate duplicate code in tdx_clear_page()
      x86/tdx: Skip clearing reclaimed pages unless X86_BUG_TDX_PW_MCE is present

 arch/x86/include/asm/tdx.h  |  2 ++
 arch/x86/kvm/vmx/tdx.c      | 19 -------------------
 arch/x86/virt/vmx/tdx/tdx.c | 15 +++++++++++++++
 3 files changed, 17 insertions(+), 19 deletions(-)


Regards
Adrian