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- Switch the in-place instruction patching which lead to at least one weird bug

Browse source 
with 32-bit guests, seeing stale instruction bytes, to one working on
   a buffer, like the rest of the alternatives code does
 
 - Add a long overdue check to the X86_FEATURE flag modifying functions to warn
   when former get changed in a non-compatible way after alternatives have been
   patched because those changes will be already wrong
 
 - Other cleanups
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Merge tag 'x86_alternatives_for_v6.10_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 asm alternatives updates from Borislav Petkov:

 - Switch the in-place instruction patching which lead to at least one
   weird bug with 32-bit guests, seeing stale instruction bytes, to one
   working on a buffer, like the rest of the alternatives code does

 - Add a long overdue check to the X86_FEATURE flag modifying functions
   to warn when former get changed in a non-compatible way after
   alternatives have been patched because those changes will be already
   wrong

 - Other cleanups

* tag 'x86_alternatives_for_v6.10_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/alternatives: Remove alternative_input_2()
  x86/alternatives: Sort local vars in apply_alternatives()
  x86/alternatives: Optimize optimize_nops()
  x86/alternatives: Get rid of __optimize_nops()
  x86/alternatives: Use a temporary buffer when optimizing NOPs
  x86/alternatives: Catch late X86_FEATURE modifiers
This commit is contained in:
Linus Torvalds 2024-05-14 08:51:37 -07:00
commit 25c7cb05fa
6 changed files with 71 additions and 98 deletions
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