Differential D36466 Diff 111175 sys/dev/hyperv/vmbus/aarch64/hyperv_machdep.c

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sys/dev/hyperv/vmbus/aarch64/hyperv_machdep.c

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				/*- SPDX-License-Identifier: BSD-2-Clause-FreeBSD
				*
				* Copyright (c) 2016-2017,2022 Microsoft Corp.
				*
				* Redistribution and use in source and binary forms, with or without
				* modification, are permitted provided that the following conditions
				* are met:
				* 1. Redistributions of source code must retain the above copyright
				* notice unmodified, this list of conditions, and the following
				* disclaimer.
				* 2. Redistributions in binary form must reproduce the above copyright
				* notice, this list of conditions and the following disclaimer in the
				* documentation and/or other materials provided with the distribution.
				*
				* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
				* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
				* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
				* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
				* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
				* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
				* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
				* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
				* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
				* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
				*/

				#include <sys/cdefs.h>
				__FBSDID("$FreeBSD$");

				#include <dev/hyperv/include/hyperv.h>
				#include <dev/hyperv/include/hyperv_busdma.h>
				#include <dev/hyperv/vmbus/aarch64/hyperv_machdep.h>
				#include <dev/hyperv/vmbus/aarch64/hyperv_reg.h>
				#include <dev/hyperv/vmbus/hyperv_var.h>
				#include <dev/psci/smccc.h>

				#define HVCALL_SET_VP_REGISTERS 0x0051
				#define HVCALL_GET_VP_REGISTERS 0x0050
				#define BIT(A) (1 << (A))
				#define HV_HYPERCALL_FAST_BIT BIT(16)
				#define BIT_ULL(a) (1ULL << (a))
				#define HV_HYPERCALL_REP_COMP_1 BIT_ULL(32)
				#define HV_PARTITION_ID_SELF ((u64)-1)
				#define HV_VP_INDEX_SELF ((u32)-2)
				#define HV_SMCCC_FUNC_NUMBER 1

				#define HV_FUNC_ID \
				SMCCC_FUNC_ID(SMCCC_YIELDING_CALL, SMCCC_64BIT_CALL, \
				SMCCC_VENDOR_HYP_SERVICE_CALLS, HV_SMCCC_FUNC_NUMBER)

				void
				arm_hv_set_vreg(u32 msr, u64 value)
				{
				arm_smccc_hvc(HV_FUNC_ID,
				HVCALL_SET_VP_REGISTERS \| HV_HYPERCALL_FAST_BIT \|
				HV_HYPERCALL_REP_COMP_1,
				HV_PARTITION_ID_SELF, HV_VP_INDEX_SELF, msr, 0, value, 0, NULL);
				}

				void
				hv_get_vpreg_128(u32 msr, struct hv_get_vp_registers_output *result)
				mmelUnsubmitted Not Done Inline Actions But who will check if the target supports PSCI 1.2 (or later)? All my FDT-based boards hang inside the arm_smccc_1_2_hvc() function (none of them support PSCI 1.2). mmel: But who will check if the target supports PSCI 1.2 (or later)? All my FDT-based boards hang…
				{
				struct arm_smccc_1_2_regs args;
				struct arm_smccc_1_2_regs res;

				args.a0 = HV_FUNC_ID;
				args.a1 = HVCALL_GET_VP_REGISTERS \| HV_HYPERCALL_FAST_BIT \|
				HV_HYPERCALL_REP_COMP_1;
				args.a2 = HV_PARTITION_ID_SELF;
				args.a3 = HV_VP_INDEX_SELF;
				args.a4 = msr;

				/*
				* Use the SMCCC 1.2 interface because the results are in registers
				* beyond X0-X3.
				*/
				arm_smccc_1_2_hvc(&args, &res);

				result->as64.low = res.a6;
				result->as64.high = res.a7;
				}

				u64
				arm_hv_get_vreg(u32 msr)
				{
				struct hv_get_vp_registers_output output;

				hv_get_vpreg_128(msr, &output);

				return (output.as64.low);
				}

				uint64_t
				hypercall_md(volatile void *hc_addr, uint64_t in_val, uint64_t in_paddr,
				uint64_t out_paddr)
				{
				struct arm_smccc_res res;

				arm_smccc_hvc(HV_FUNC_ID, in_val, in_paddr, out_paddr, 0, 0, 0, 0,
				&res);

				return (res.a0);
				}