[v2] x86/tdx: Skip clearing reclaimed pages unless X86_BUG_TDX_PW_MCE is present

[PATCH V2 0/2] x86/tdx: Skip clearing reclaimed pages unless X86_BUG_TDX_PW_MCE is present

Adrian Hunter posted 2 patches 3 months ago

Diff against v1 v1 v3 v4 v5 v6 v7
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There is a newer version of this series

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(-)

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[PATCH V2 0/2] x86/tdx: Skip clearing reclaimed pages unless X86_BUG_TDX_PW_MCE is present

Posted by Adrian Hunter 3 months ago

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