git.ipfire.org Git - thirdparty/kernel/stable.git/commit

author	Borislav Petkov (AMD) <bp@alien8.de>
	Sat, 15 Jul 2023 11:41:28 +0000 (13:41 +0200)
committer	Greg Kroah-Hartman <gregkh@linuxfoundation.org>
	Mon, 24 Jul 2023 17:10:53 +0000 (19:10 +0200)
commit	00363ef30797211c247605464dc3daaa988531a2
tree	b67307a9a45a5591c0bf94e080be2e1ff682f589	tree \| snapshot
parent	92b292bed627f18b8ad9e0ad6cdbde47eeeb9a8e	commit \| diff

x86/cpu/amd: Add a Zenbleed fix

Upstream commit: 522b1d69219d8f083173819fde04f994aa051a98

Add a fix for the Zen2 VZEROUPPER data corruption bug where under
certain circumstances executing VZEROUPPER can cause register
corruption or leak data.

The optimal fix is through microcode but in the case the proper
microcode revision has not been applied, enable a fallback fix using
a chicken bit.

Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

arch/x86/include/asm/microcode.h		diff \| blob \| blame \| history
arch/x86/include/asm/microcode_amd.h		diff \| blob \| blame \| history
arch/x86/include/asm/msr-index.h		diff \| blob \| blame \| history
arch/x86/kernel/cpu/amd.c		diff \| blob \| blame \| history
arch/x86/kernel/cpu/common.c		diff \| blob \| blame \| history