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Commit 47c2f292 authored by Fenghua Yu's avatar Fenghua Yu Committed by H. Peter Anvin
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x86/xsaves: Call booting time xsaves and xrstors in setup_init_fpu_buf 



setup_init_fpu_buf() calls booting time xsaves and xrstors to save and restore
xstate in xsave area.

Signed-off-by: default avatarFenghua Yu <fenghua.yu@intel.com>
Link: http://lkml.kernel.org/r/1401387164-43416-15-git-send-email-fenghua.yu@intel.com


Signed-off-by: default avatarH. Peter Anvin <hpa@linux.intel.com>
parent f41d830f

arch/x86/kernel/xsave.c

+8 −2
Original line number Diff line number Diff line
@@ -496,15 +496,21 @@ static void __init setup_init_fpu_buf(void) 


	setup_xstate_features();



	if (cpu_has_xsaves) {

		init_xstate_buf->xsave_hdr.xcomp_bv =

						(u64)1 << 63 | pcntxt_mask;

		init_xstate_buf->xsave_hdr.xstate_bv = pcntxt_mask;

	}



	/*

	 * Init all the features state with header_bv being 0x0

	 */

	xrstor_state(init_xstate_buf, -1);

	xrstor_state_booting(init_xstate_buf, -1);

	/*

	 * Dump the init state again. This is to identify the init state

	 * of any feature which is not represented by all zero's.

	 */

	xsave_state(init_xstate_buf, -1);

	xsave_state_booting(init_xstate_buf, -1);

}



static enum { AUTO, ENABLE, DISABLE } eagerfpu = AUTO;