[PATCH V4 0/2] x86/tdx: Skip clearing reclaimed pages unless X86_BUG_TDX_PW_MCE is present

[Adrian Hunter <adrian.hunter@intel.com>]

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 V4:

      x86/tdx: Eliminate duplicate code in tdx_clear_page()
	Add and use tdx_quirk_reset_page() for KVM (Sean)

      x86/tdx: Skip clearing reclaimed pages unless X86_BUG_TDX_PW_MCE is present
	Add TDX Module Base spec. version (Rick)
	Add Rick's Rev'd-by

Changes in V3:

      x86/tdx: Eliminate duplicate code in tdx_clear_page()
	Explain "quirk" rename in commit message (Rick)
	Explain mb() change in commit message  (Rick)
	Add Rev'd-by, Ack'd-by tags

      x86/tdx: Skip clearing reclaimed pages unless X86_BUG_TDX_PW_MCE is present
	Remove "flush cache" comments (Rick)
	Update function comment to better relate to "quirk" naming (Rick)
	Add "via MOVDIR64B" to comment (Xiaoyao)
	Add Rev'd-by, Ack'd-by tags

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 | 20 +++++++++++++++-----
 3 files changed, 20 insertions(+), 27 deletions(-)


Regards
Adrian