Kim Phillips ff5305ec8c x86/cpu: Enable STIBP on AMD if Automatic IBRS is enabled ... commit fd470a8bee upstream. Unlike Intel's Enhanced IBRS feature, AMD's Automatic IBRS does not provide protection to processes running at CPL3/user mode, see section "Extended Feature Enable Register (EFER)" in the APM v2 at https://bugzilla.kernel.org/attachment.cgi?id=304652 Explicitly enable STIBP to protect against cross-thread CPL3 branch target injections on systems with Automatic IBRS enabled. Also update the relevant documentation. Fixes: e7862eda30 ("x86/cpu: Support AMD Automatic IBRS") Reported-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: Kim Phillips <kim.phillips@amd.com> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20230720194727.67022-1-kim.phillips@amd.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2024-04-10 16:19:34 +02:00
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alpha
arc
arm	arm: dts: marvell: Fix maxium->maxim typo in brownstone dts	2024-04-10 16:18:34 +02:00
arm64	KVM: arm64: Limit stage2_apply_range() batch size to largest block	2024-04-10 16:18:47 +02:00
csky
h8300
hexagon	hexagon: vmlinux.lds.S: handle attributes section	2024-04-10 16:19:31 +02:00
ia64	arch: Introduce CONFIG_FUNCTION_ALIGNMENT	2024-04-10 16:18:49 +02:00
m68k
microblaze
mips
nds32
nios2
openrisc
parisc	parisc: Strip upper 32 bit of sum in csum_ipv6_magic for 64-bit builds	2024-04-10 16:18:36 +02:00
powerpc	powerpc: xor_vmx: Add '-mhard-float' to CFLAGS	2024-04-10 16:19:30 +02:00
riscv
s390	s390/vtime: fix average steal time calculation	2024-03-26 18:21:35 -04:00
sh
sparc	sparc: vDSO: fix return value of __setup handler	2024-04-10 16:18:34 +02:00
um
x86	x86/cpu: Enable STIBP on AMD if Automatic IBRS is enabled	2024-04-10 16:19:34 +02:00
xtensa
.gitignore
Kconfig	arch: Introduce CONFIG_FUNCTION_ALIGNMENT	2024-04-10 16:18:49 +02:00