On 2/21/21 12:10 PM, Bae, Chang Seok wrote: > On Feb 21, 2021, at 11:30, Randy Dunlap <rdun...@infradead.org> wrote: >> Can we tell people (in this Doc file) where to look up the values that can be >> used in xstate.enable and xstate.disable? > > Perhaps add something like this with the change below: > “See comment before function fpu__init_parse_early_param() in > arch/x86/kernel/fpu/init.c."
Hi, I was thinking more along the lines of where can I find the value 0x60000 or BIT(22) or BIT(19), for example and see what they mean, even though it will likely be some abbreviation. > /* > * The kernel parameter "xstate.enable='mask'" and "xstate.disable='mask'" > have a > * mask value in a subset of XFEATURE_MASK_CONFIGURABLE. > * > * The longest parameter is 22 octal number characters with '0' prefix and an > extra > * '\0' for termination. > */ > #define MAX_XSTATE_MASK_CHARS 24 > > /** > * fpu__init_parse_early_param() - parse the xstate kernel parameters > * > * Parse them early because fpu__init_system() is executed before > * parse_early_param(). > */ > static void __init fpu__init_parse_early_param(void) thanks. -- ~Randy
