arm64/hyperv/hv_core.c

1 // SPDX-License-Identifier: GPL-2.0
4  * Low level utility routines for interacting with Hyper-V.
15 #include <linux/arm-smccc.h>
17 #include <asm-generic/bug.h>
18 #include <asm/hyperv-tlfs.h>
22  * hv_do_hypercall- Invoke the specified hypercall
40  * hv_do_fast_hypercall8 -- Invoke the specified hypercall
58  * Set a single VP register to a 64-bit value.
105 	 * beyond X0-X3.  in hv_get_vpreg_128()
116 	result->as64.low = res.a6;  in hv_get_vpreg_128()
117 	result->as64.high = res.a7;  in hv_get_vpreg_128()
127 	return output.as64.low;  in hv_get_vpreg()
132  * hyperv_report_panic - report a panic to Hyper-V.  This function uses
133  * the older version of the Hyper-V interface that admittedly doesn't
134  * pass enough information to be useful beyond just recording the
137  * more useful. Hyper-V on ARM64 always supports the newer interface, but
147 	/* Don't report a panic to Hyper-V if we're not going to panic */  in hyperv_report_panic()
166 	 * Hyper-V provides the ability to store only 5 values.  in hyperv_report_panic()
172 	hv_set_vpreg(HV_REGISTER_CRASH_P2, regs->pc);  in hyperv_report_panic()
173 	hv_set_vpreg(HV_REGISTER_CRASH_P3, regs->sp);  in hyperv_report_panic()
177 	 * Let Hyper-V know there is crash data available  in hyperv_report_panic()