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SDM rev. 50 defines the use of the next 8 bytes in the xstate header.

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It is the compaction bitmask, with the highest bit defining if compact
format of the xsave area is used at all.

Adjust the definition of struct xstate_hdr, provide define for bit 63.

Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
This commit is contained in:
Konstantin Belousov 2014-09-06 19:39:12 +00:00
parent f47f328dc5
commit f3f509767a
1 changed files with 3 additions and 1 deletions
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4
sys/x86/include/fpu.h
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@ -150,9 +150,11 @@ struct savefpu {
struct xstate_hdr {
uint64_t xstate_bv;
uint8_t xstate_rsrv0[16];
uint64_t xstate_xcomp_bv;
uint8_t xstate_rsrv0[8];
uint8_t xstate_rsrv[40];
};
#define XSTATE_XCOMP_BV_COMPACT (1ULL << 63)
struct savexmm_xstate {
struct xstate_hdr sx_hd;