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From: Adrian Hunter <adrian.hunter@intel.com>
To: Dave Hansen <dave.hansen@linux.intel.com>,
	pbonzini@redhat.com, seanjc@google.com, vannapurve@google.com
Cc: Tony Luck <tony.luck@intel.com>, Borislav Petkov <bp@alien8.de>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>,
	x86@kernel.org, H Peter Anvin <hpa@zytor.com>,
	linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
	rick.p.edgecombe@intel.com, kirill.shutemov@linux.intel.com,
	kai.huang@intel.com, reinette.chatre@intel.com,
	xiaoyao.li@intel.com, tony.lindgren@linux.intel.com,
	binbin.wu@linux.intel.com, isaku.yamahata@intel.com,
	yan.y.zhao@intel.com, chao.gao@intel.com
Subject: [PATCH V2 0/2] x86/tdx: Skip clearing reclaimed pages unless X86_BUG_TDX_PW_MCE is present
Date: Thu,  3 Jul 2025 18:37:10 +0300	[thread overview]
Message-ID: <20250703153712.155600-1-adrian.hunter@intel.com> (raw)

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%.


Changes in V2 (as requested by Dave):

      x86/tdx: Eliminate duplicate code in tdx_clear_page()
	Rename reset_tdx_pages() to tdx_quirk_reset_paddr()
	Call tdx_quirk_reset_paddr() directly

      x86/tdx: Skip clearing reclaimed pages unless X86_BUG_TDX_PW_MCE is present
	Improve the comment


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      | 25 +++----------------------
 arch/x86/virt/vmx/tdx/tdx.c | 13 +++++++++++--
 3 files changed, 16 insertions(+), 24 deletions(-)


Regards
Adrian

             reply	other threads:[~2025-07-03 15:37 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-07-03 15:37 Adrian Hunter [this message]
2025-07-03 15:37 ` [PATCH V2 1/2] x86/tdx: Eliminate duplicate code in tdx_clear_page() Adrian Hunter
2025-07-03 16:34   ` Kirill A. Shutemov
2025-07-04  6:44   ` Binbin Wu
2025-07-04 15:33   ` Xiaoyao Li
2025-07-07  2:08   ` Huang, Kai
2025-07-07 17:31   ` Edgecombe, Rick P
2025-07-03 15:37 ` [PATCH V2 2/2] x86/tdx: Skip clearing reclaimed pages unless X86_BUG_TDX_PW_MCE is present Adrian Hunter
2025-07-03 16:44   ` Kirill A. Shutemov
2025-07-03 17:06   ` Vishal Annapurve
2025-07-04  5:37     ` Adrian Hunter
2025-07-07 23:31       ` Vishal Annapurve
2025-07-04  1:32   ` Xiaoyao Li
2025-07-04  6:44     ` Binbin Wu
2025-07-07  2:09   ` Huang, Kai
2025-07-07  3:16   ` Chao Gao
2025-07-07  4:23     ` Dave Hansen
2025-07-07  7:15       ` Chao Gao
2025-07-07 11:39         ` Huang, Kai
2025-07-07 14:32         ` Dave Hansen
2025-07-07 18:15           ` Edgecombe, Rick P

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