Merge "arm64: gettimeofday change for timer rollover condition"

ENTRY(__do_get_tspec)

	.cfi_startproc

	/* Read the virtual counter. */

	isb

#if IS_ENABLED(CONFIG_MSM_TIMER_LEAP)

#define LEAST_32BITS		0x00000000FFFFFFFF

reread:

	mrs	x15, cntvct_el0

	and	x13, x15, #LEAST_32BITS

	eor	x13, x13, #LEAST_32BITS

	cbz	x13, reread

#else

	mrs	x15, cntvct_el0

#endif

	/* Read from the vDSO data page. */

	ldr	x10, [vdso_data, #VDSO_CS_CYCLE_LAST]

	ldp	x13, x14, [vdso_data, #VDSO_XTIME_CLK_SEC]

	ldp	w11, w12, [vdso_data, #VDSO_CS_MULT]

	seqcnt_read w9

	/* Read the virtual counter. */

	isb

	mrs	x15, cntvct_el0

	/* Calculate cycle delta and convert to ns. */

	sub	x10, x15, x10

	/* We can only guarantee 56 bits of precision. */