mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 22:46:40 +07:00
x86/fpu: Print supported xstate features in human readable way
Inform the user/admin about which xstate features the kernel supports. Reviewed-by: Borislav Petkov <bp@alien8.de> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
parent
32d4d9ccb0
commit
69496e10f8
@ -482,6 +482,30 @@ static void __init setup_xstate_features(void)
|
||||
} while (1);
|
||||
}
|
||||
|
||||
static void print_xstate_feature(u64 xstate_mask, const char *desc)
|
||||
{
|
||||
if (pcntxt_mask & xstate_mask) {
|
||||
int xstate_feature = fls64(xstate_mask)-1;
|
||||
|
||||
pr_info("x86/fpu: Supporting XSAVE feature %2d: '%s'\n", xstate_feature, desc);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Print out all the supported xstate features:
|
||||
*/
|
||||
static void print_xstate_features(void)
|
||||
{
|
||||
print_xstate_feature(XSTATE_FP, "x87 floating point registers");
|
||||
print_xstate_feature(XSTATE_SSE, "SSE registers");
|
||||
print_xstate_feature(XSTATE_YMM, "AVX registers");
|
||||
print_xstate_feature(XSTATE_BNDREGS, "MPX bounds registers");
|
||||
print_xstate_feature(XSTATE_BNDCSR, "MPX CSR");
|
||||
print_xstate_feature(XSTATE_OPMASK, "AVX-512 opmask");
|
||||
print_xstate_feature(XSTATE_ZMM_Hi256, "AVX-512 Hi256");
|
||||
print_xstate_feature(XSTATE_Hi16_ZMM, "AVX-512 ZMM_Hi256");
|
||||
}
|
||||
|
||||
/*
|
||||
* This function sets up offsets and sizes of all extended states in
|
||||
* xsave area. This supports both standard format and compacted format
|
||||
@ -545,6 +569,7 @@ static void __init setup_init_fpu_buf(void)
|
||||
return;
|
||||
|
||||
setup_xstate_features();
|
||||
print_xstate_features();
|
||||
|
||||
if (cpu_has_xsaves) {
|
||||
init_xstate_buf->xsave_hdr.xcomp_bv =
|
||||
|
Loading…
Reference in New Issue
Block a user