diff options
Diffstat (limited to 'arch/x86/kernel/fpu')
| -rw-r--r-- | arch/x86/kernel/fpu/xstate.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c index cd7f1a6bd933..a024fa591a93 100644 --- a/arch/x86/kernel/fpu/xstate.c +++ b/arch/x86/kernel/fpu/xstate.c @@ -168,26 +168,27 @@ void fpu__init_cpu_xstate(void) } /* - * Record the offsets and sizes of different state managed by the xsave - * memory layout. + * Record the offsets and sizes of various xstates contained + * in the XSAVE state memory layout. + * + * ( Note that certain features might be non-present, for them + * we'll have 0 offset and 0 size. ) */ static void __init setup_xstate_features(void) { - int eax, ebx, ecx, edx, leaf = 0x2; + u32 eax, ebx, ecx, edx, leaf; xfeatures_nr = fls64(xfeatures_mask); - do { + for (leaf = 2; leaf < xfeatures_nr; leaf++) { cpuid_count(XSTATE_CPUID, leaf, &eax, &ebx, &ecx, &edx); - if (eax == 0) - break; - xstate_offsets[leaf] = ebx; xstate_sizes[leaf] = eax; + printk(KERN_INFO "x86/fpu: xstate_offset[%d]: %04x, xstate_sizes[%d]: %04x\n", leaf, ebx, leaf, eax); leaf++; - } while (1); + } } static void print_xstate_feature(u64 xstate_mask) |