#define FIRST_EXTENDED_XFEATURE XFEATURE_YMM
+struct reg_128_bit {
+ u8 regbytes[128/8];
+};
+struct reg_256_bit {
+ u8 regbytes[256/8];
+};
+struct reg_512_bit {
+ u8 regbytes[512/8];
+};
+
/*
+ * State component 2:
+ *
* There are 16x 256-bit AVX registers named YMM0-YMM15.
* The low 128 bits are aliased to the 16 SSE registers (XMM0-XMM15)
- * and are stored in 'struct fxregs_state::xmm_space[]'.
+ * and are stored in 'struct fxregs_state::xmm_space[]' in the
+ * "legacy" area.
*
- * The high 128 bits are stored here:
- * 16x 128 bits == 256 bytes.
+ * The high 128 bits are stored here.
*/
struct ymmh_struct {
- u8 ymmh_space[256];
-};
+ struct reg_128_bit hi_ymm[16];
+} __packed;
/* Intel MPX support: */
-struct bndreg {
+
+struct mpx_bndreg {
u64 lower_bound;
u64 upper_bound;
} __packed;
+/*
+ * State component 3 is used for the 4 128-bit bounds registers
+ */
+struct mpx_bndreg_state {
+ struct mpx_bndreg bndreg[4];
+} __packed;
-struct bndcsr {
+/*
+ * State component 4 is used for the 64-bit user-mode MPX
+ * configuration register BNDCFGU and the 64-bit MPX status
+ * register BNDSTATUS. We call the pair "BNDCSR".
+ */
+struct mpx_bndcsr {
u64 bndcfgu;
u64 bndstatus;
} __packed;
-struct mpx_struct {
- struct bndreg bndreg[4];
- struct bndcsr bndcsr;
-};
+/*
+ * The BNDCSR state is padded out to be 64-bytes in size.
+ */
+struct mpx_bndcsr_state {
+ union {
+ struct mpx_bndcsr bndcsr;
+ u8 pad_to_64_bytes[64];
+ };
+} __packed;
+
+/* AVX-512 Components: */
+
+/*
+ * State component 5 is used for the 8 64-bit opmask registers
+ * k0-k7 (opmask state).
+ */
+struct avx_512_opmask_state {
+ u64 opmask_reg[8];
+} __packed;
+
+/*
+ * State component 6 is used for the upper 256 bits of the
+ * registers ZMM0-ZMM15. These 16 256-bit values are denoted
+ * ZMM0_H-ZMM15_H (ZMM_Hi256 state).
+ */
+struct avx_512_zmm_uppers_state {
+ struct reg_256_bit zmm_upper[16];
+} __packed;
+
+/*
+ * State component 7 is used for the 16 512-bit registers
+ * ZMM16-ZMM31 (Hi16_ZMM state).
+ */
+struct avx_512_hi16_state {
+ struct reg_512_bit hi16_zmm[16];
+} __packed;
struct xstate_header {
u64 xfeatures;