Johannes Wikner 72ec8fc23e x86/cpufeatures: Add a IBPB_NO_RET BUG flag ...

commit 3ea87dfa31a7b0bb0ff1675e67b9e54883013074 upstream.

Set this flag if the CPU has an IBPB implementation that does not
invalidate return target predictions. Zen generations < 4 do not flush
the RSB when executing an IBPB and this bug flag denotes that.

  [ bp: Massage. ]

Signed-off-by: Johannes Wikner <kwikner@ethz.ch>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Cc: <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2024-10-22 15:56:45 +02:00

..

asm

x86/cpufeatures: Add a IBPB_NO_RET BUG flag

2024-10-22 15:56:45 +02:00

uapi/asm

x86/sev: Add SEV-SNP guest feature negotiation support

2023-02-01 08:34:50 +01:00