* Make SGX less likely to induce fatal machine checks

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* Use much more compact SHA-256 library API
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Merge tag 'x86_sgx_for_6.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull Intel software guard extension (SGX) updates from Dave Hansen:
 "A couple of x86/sgx changes.

  The first one is a no-brainer to use the (simple) SHA-256 library.

  For the second one, some folks doing testing noticed that SGX systems
  under memory pressure were inducing fatal machine checks at pretty
  unnerving rates, despite the SGX code having _some_ awareness of
  memory poison.

  It turns out that the SGX reclaim path was not checking for poison
  _and_ it always accesses memory to copy it around. Make sure that
  poisoned pages are not reclaimed"

* tag 'x86_sgx_for_6.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/sgx: Prevent attempts to reclaim poisoned pages
  x86/sgx: Use SHA-256 library API instead of crypto_shash API

...

This commit is contained in:

Linus Torvalds 2025-05-29 21:13:17 -07:00

parent b78f1293f9 ed16618c38

commit bbd9c366bf

4 changed files with 5 additions and 31 deletions

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3

arch/x86/Kconfig

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1

arch/x86/kernel/cpu/sgx/driver.h

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30

arch/x86/kernel/cpu/sgx/ioctl.c

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2

arch/x86/kernel/cpu/sgx/main.c

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