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x86/fpu: Remove xsave_init() bootmem allocations
There's only 8 xstate bits at the moment, and it's not like we can support unknown bits - so put xstate_offsets[] and xstate_sizes[] into static allocation. This is in preparation to be able to call the FPU init code earlier, when there's no bootmem available yet. 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>
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@ -15,6 +15,9 @@
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#define XSTATE_ZMM_Hi256 0x40
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#define XSTATE_Hi16_ZMM 0x80
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/* The highest xstate bit above (of XSTATE_Hi16_ZMM): */
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#define XFEATURES_NR_MAX 8
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#define XSTATE_FPSSE (XSTATE_FP | XSTATE_SSE)
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#define XSTATE_AVX512 (XSTATE_OPMASK | XSTATE_ZMM_Hi256 | XSTATE_Hi16_ZMM)
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/* Bit 63 of XCR0 is reserved for future expansion */
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@ -23,7 +23,7 @@ u64 xfeatures_mask;
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struct xsave_struct *init_xstate_buf;
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static struct _fpx_sw_bytes fx_sw_reserved, fx_sw_reserved_ia32;
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static unsigned int *xstate_offsets, *xstate_sizes;
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static unsigned int xstate_offsets[XFEATURES_NR_MAX], xstate_sizes[XFEATURES_NR_MAX];
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static unsigned int xstate_comp_offsets[sizeof(xfeatures_mask)*8];
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/* The number of supported xfeatures in xfeatures_mask: */
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@ -478,8 +478,6 @@ static void __init setup_xstate_features(void)
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int eax, ebx, ecx, edx, leaf = 0x2;
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xfeatures_nr = fls64(xfeatures_mask);
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xstate_offsets = alloc_bootmem(xfeatures_nr * sizeof(int));
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xstate_sizes = alloc_bootmem(xfeatures_nr * sizeof(int));
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do {
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cpuid_count(XSTATE_CPUID, leaf, &eax, &ebx, &ecx, &edx);
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