From 7cc1c177de67a79ecdd428bebb8718692a6bff0d Mon Sep 17 00:00:00 2001 From: Ian Moffett Date: Wed, 28 May 2025 22:53:05 -0400 Subject: kconf: GENERIC: Add additional documentation Signed-off-by: Ian Moffett --- sys/arch/aarch64/conf/GENERIC | 4 ++-- sys/arch/amd64/conf/GENERIC | 12 +++++++++--- 2 files changed, 11 insertions(+), 5 deletions(-) (limited to 'sys/arch') diff --git a/sys/arch/aarch64/conf/GENERIC b/sys/arch/aarch64/conf/GENERIC index 5691685..3271cb7 100644 --- a/sys/arch/aarch64/conf/GENERIC +++ b/sys/arch/aarch64/conf/GENERIC @@ -1,5 +1,5 @@ // Kernel options -option SERIAL_DEBUG yes +option SERIAL_DEBUG yes // Enable kmsg serial logging // Kernel constants -setval SCHED_NQUEUE 4 +setval SCHED_NQUEUE 4 // Number of scheduler queues (for MLFQ) diff --git a/sys/arch/amd64/conf/GENERIC b/sys/arch/amd64/conf/GENERIC index db3ce4c..8e97d6e 100644 --- a/sys/arch/amd64/conf/GENERIC +++ b/sys/arch/amd64/conf/GENERIC @@ -1,9 +1,15 @@ +// // Kernel options -option SPECTRE_IBRS no -option SERIAL_DEBUG yes +// +// XXX: Indirect branch restricted speculation (SPECTRE_IBRS) +// is disabled by default as it can lead to significant +// performance degradation. +// +option SPECTRE_IBRS no // Enable the IBRS CPU feature +option SERIAL_DEBUG yes // Enable kmsg serial logging // Kernel constants -setval SCHED_NQUEUE 4 +setval SCHED_NQUEUE 4 // Number of scheduler queues (for MLFQ) // Console attributes setval CONSOLE_BG 0x000000 -- cgit v1.2.3