[v1] x86/amd: LFENCE always serializing CPUID bit

[PATCH 0/2] x86/amd: LFENCE always serializing CPUID bit

Roger Pau Monne posted 2 patches 3 years, 7 months ago

Diff against v2
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git fetch https://gitlab.com/xen-project/patchew/xen tags/patchew/20210414110433.83084-1-roger.pau@citrix.com

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tools/misc/xen-cpuid.c                      |  6 ++
xen/arch/x86/cpu/amd.c                      | 69 ++++++++++++---------
xen/arch/x86/cpu/common.c                   |  3 +
xen/arch/x86/cpu/cpu.h                      |  1 +
xen/arch/x86/cpu/hygon.c                    | 27 +-------
xen/include/asm-x86/cpufeatures.h           |  2 +-
xen/include/public/arch-x86/cpufeatureset.h |  3 +
xen/include/xen/lib/x86/cpuid.h             | 37 ++++++++++-
8 files changed, 92 insertions(+), 56 deletions(-)

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[PATCH 0/2] x86/amd: LFENCE always serializing CPUID bit

Posted by Roger Pau Monne 3 years, 7 months ago

Hello,

The following patches aim to add support for the LFENCE always
serializing CPUID bit found in leaf 80000021.eax. In order to do that
the featureset needs to be expanded to support leaf 80000021.eax.

Thanks, Roger.

Roger Pau Monne (2):
  x86/amd: split LFENCE dispatch serializing setup logic into helper
  x86/cpuid: support LFENCE always serializing CPUID bit

 tools/misc/xen-cpuid.c                      |  6 ++
 xen/arch/x86/cpu/amd.c                      | 69 ++++++++++++---------
 xen/arch/x86/cpu/common.c                   |  3 +
 xen/arch/x86/cpu/cpu.h                      |  1 +
 xen/arch/x86/cpu/hygon.c                    | 27 +-------
 xen/include/asm-x86/cpufeatures.h           |  2 +-
 xen/include/public/arch-x86/cpufeatureset.h |  3 +
 xen/include/xen/lib/x86/cpuid.h             | 37 ++++++++++-
 8 files changed, 92 insertions(+), 56 deletions(-)

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2.30.1