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4d846d260e
The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch up to that fact and revert to their recommended match of BSD-2-Clause. Discussed with: pfg MFC After: 3 days Sponsored by: Netflix
104 lines
3.3 KiB
C
104 lines
3.3 KiB
C
/*- SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2016-2017,2022 Microsoft Corp.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice unmodified, this list of conditions, and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <dev/hyperv/include/hyperv.h>
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#include <dev/hyperv/include/hyperv_busdma.h>
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#include <dev/hyperv/vmbus/aarch64/hyperv_machdep.h>
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#include <dev/hyperv/vmbus/aarch64/hyperv_reg.h>
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#include <dev/hyperv/vmbus/hyperv_var.h>
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#include <dev/hyperv/vmbus/hyperv_common_reg.h>
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#include <dev/psci/smccc.h>
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#define HVCALL_SET_VP_REGISTERS 0x0051
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#define HVCALL_GET_VP_REGISTERS 0x0050
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#define BIT(A) (1 << (A))
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#define HV_HYPERCALL_FAST_BIT BIT(16)
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#define BIT_ULL(a) (1ULL << (a))
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#define HV_HYPERCALL_REP_COMP_1 BIT_ULL(32)
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#define HV_PARTITION_ID_SELF ((u64)-1)
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#define HV_VP_INDEX_SELF ((u32)-2)
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#define HV_SMCCC_FUNC_NUMBER 1
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#define HV_FUNC_ID \
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SMCCC_FUNC_ID(SMCCC_YIELDING_CALL, SMCCC_64BIT_CALL, \
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SMCCC_VENDOR_HYP_SERVICE_CALLS, HV_SMCCC_FUNC_NUMBER)
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void
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arm_hv_set_vreg(u32 msr, u64 value)
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{
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arm_smccc_hvc(HV_FUNC_ID,
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HVCALL_SET_VP_REGISTERS | HV_HYPERCALL_FAST_BIT |
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HV_HYPERCALL_REP_COMP_1,
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HV_PARTITION_ID_SELF, HV_VP_INDEX_SELF, msr, 0, value, 0, NULL);
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}
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void
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hv_get_vpreg_128(u32 msr, struct hv_get_vp_registers_output *result)
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{
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struct arm_smccc_1_2_regs args;
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struct arm_smccc_1_2_regs res;
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args.a0 = HV_FUNC_ID;
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args.a1 = HVCALL_GET_VP_REGISTERS | HV_HYPERCALL_FAST_BIT |
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HV_HYPERCALL_REP_COMP_1;
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args.a2 = HV_PARTITION_ID_SELF;
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args.a3 = HV_VP_INDEX_SELF;
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args.a4 = msr;
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/*
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* Use the SMCCC 1.2 interface because the results are in registers
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* beyond X0-X3.
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*/
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arm_smccc_1_2_hvc(&args, &res);
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result->as64.low = res.a6;
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result->as64.high = res.a7;
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}
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u64
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arm_hv_get_vreg(u32 msr)
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{
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struct hv_get_vp_registers_output output;
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hv_get_vpreg_128(msr, &output);
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return (output.as64.low);
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}
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uint64_t
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hypercall_md(volatile void *hc_addr, uint64_t in_val, uint64_t in_paddr,
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uint64_t out_paddr)
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{
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struct arm_smccc_res res;
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arm_smccc_hvc(HV_FUNC_ID, in_val, in_paddr, out_paddr, 0, 0, 0, 0,
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&res);
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return (res.a0);
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}
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