x86: Switch X86_FEATURE_XENPV to cpu_feature_enabled() use

[PATCH v2 0/5] x86: Switch X86_FEATURE_XENPV to cpu_feature_enabled() use

Juergen Gross posted 5 patches 1 year, 6 months ago

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arch/x86/include/asm/disabled-features.h | 8 +++++++-
arch/x86/include/asm/entry-common.h      | 4 ++--
arch/x86/include/asm/switch_to.h         | 7 ++-----
arch/x86/kernel/cpu/amd.c                | 2 +-
arch/x86/kernel/cpu/bugs.c               | 2 +-
arch/x86/kernel/cpu/hygon.c              | 2 +-
arch/x86/kernel/process_64.c             | 4 ++--
arch/x86/kernel/topology.c               | 2 +-
arch/x86/mm/cpu_entry_area.c             | 8 ++------
9 files changed, 19 insertions(+), 20 deletions(-)

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[PATCH v2 0/5] x86: Switch X86_FEATURE_XENPV to cpu_feature_enabled() use

Posted by Juergen Gross 1 year, 6 months ago

Make especially kernels without CONFIG_XEN_PV more efficient by
using cpu_feature_enabled(X86_FEATURE_XENPV) instead of boot_cpu_has()
and friends.

Changes in V2:
- new patch 4

Juergen Gross (5):
  x86: add X86_FEATURE_XENPV to disabled-features.h
  x86: remove unneeded 64-bit dependency in arch_enter_from_user_mode()
  x86: drop 32-bit Xen PV guest code in update_task_stack()
  x86: remove X86_FEATURE_XENPV usage in setup_cpu_entry_area()
  x86: switch to cpu_feature_enabled() for X86_FEATURE_XENPV

 arch/x86/include/asm/disabled-features.h | 8 +++++++-
 arch/x86/include/asm/entry-common.h      | 4 ++--
 arch/x86/include/asm/switch_to.h         | 7 ++-----
 arch/x86/kernel/cpu/amd.c                | 2 +-
 arch/x86/kernel/cpu/bugs.c               | 2 +-
 arch/x86/kernel/cpu/hygon.c              | 2 +-
 arch/x86/kernel/process_64.c             | 4 ++--
 arch/x86/kernel/topology.c               | 2 +-
 arch/x86/mm/cpu_entry_area.c             | 8 ++------
 9 files changed, 19 insertions(+), 20 deletions(-)

-- 
2.35.3

Re: [PATCH v2 0/5] x86: Switch X86_FEATURE_XENPV to cpu_feature_enabled() use

Posted by Juergen Gross 1 year, 5 months ago

On 04.11.22 08:26, Juergen Gross wrote:
> Make especially kernels without CONFIG_XEN_PV more efficient by
> using cpu_feature_enabled(X86_FEATURE_XENPV) instead of boot_cpu_has()
> and friends.
> 
> Changes in V2:
> - new patch 4
> 
> Juergen Gross (5):
>    x86: add X86_FEATURE_XENPV to disabled-features.h
>    x86: remove unneeded 64-bit dependency in arch_enter_from_user_mode()
>    x86: drop 32-bit Xen PV guest code in update_task_stack()
>    x86: remove X86_FEATURE_XENPV usage in setup_cpu_entry_area()
>    x86: switch to cpu_feature_enabled() for X86_FEATURE_XENPV
> 
>   arch/x86/include/asm/disabled-features.h | 8 +++++++-
>   arch/x86/include/asm/entry-common.h      | 4 ++--
>   arch/x86/include/asm/switch_to.h         | 7 ++-----
>   arch/x86/kernel/cpu/amd.c                | 2 +-
>   arch/x86/kernel/cpu/bugs.c               | 2 +-
>   arch/x86/kernel/cpu/hygon.c              | 2 +-
>   arch/x86/kernel/process_64.c             | 4 ++--
>   arch/x86/kernel/topology.c               | 2 +-
>   arch/x86/mm/cpu_entry_area.c             | 8 ++------
>   9 files changed, 19 insertions(+), 20 deletions(-)
> 

The patches have all an "Ack" by Dave. I think this series should go in
via the tip tree, no?


Juergen