Thomas Gleixner 8f849ff63b x86/microcode: Handle "offline" CPUs correctly ... Offline CPUs need to be parked in a safe loop when microcode update is in progress on the primary CPU. Currently, offline CPUs are parked in mwait_play_dead(), and for Intel CPUs, its not a safe instruction, because the MWAIT instruction can be patched in the new microcode update that can cause instability. - Add a new microcode state 'UCODE_OFFLINE' to report status on per-CPU basis. - Force NMI on the offline CPUs. Wake up offline CPUs while the update is in progress and then return them back to mwait_play_dead() after microcode update is complete. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Link: https://lore.kernel.org/r/20231002115903.660850472@linutronix.de		2023-10-24 15:05:55 +02:00
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amd.c	x86/microcode: Handle "nosmt" correctly	2023-10-24 15:05:54 +02:00
core.c	x86/microcode: Handle "offline" CPUs correctly	2023-10-24 15:05:55 +02:00
intel.c	x86/microcode: Rendezvous and load in NMI	2023-10-24 15:05:55 +02:00
internal.h	x86/microcode: Handle "offline" CPUs correctly	2023-10-24 15:05:55 +02:00
Makefile	x86/microcode: Hide the config knob	2023-08-13 10:26:39 +02:00