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c7368ccb68
The vm_guest variable readily covers all uses of xen_domain_type, so merge them together. Since support for PV domains has been removed hard-core xen_pv_domain() to return false. Reviewed by: royger
100 lines
3.4 KiB
C
100 lines
3.4 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright © 2008, 2013 Citrix Systems, Inc.
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* Copyright © 2012 Spectra Logic Corporation
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* Copyright © 2021 Elliott Mitchell
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* All rights reserved.
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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, this list of conditions and the following 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 AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/param.h> /* required by xen/xen-os.h */
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <machine/atomic.h> /* required by xen/xen-os.h */
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#include <xen/xen-os.h>
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#include <xen/hvm.h>
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#include <contrib/xen/vcpu.h>
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/*-------------------------------- Global Data -------------------------------*/
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/**
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* Start info flags. ATM this only used to store the initial domain flag for
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* PVHv2, and it's always empty for HVM guests.
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*/
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uint32_t hvm_start_flags;
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/*------------------ Hypervisor Access Shared Memory Regions -----------------*/
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shared_info_t *HYPERVISOR_shared_info;
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/*------------------------------- Per-CPU Data -------------------------------*/
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DPCPU_DEFINE(struct vcpu_info *, vcpu_info);
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void
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xen_setup_vcpu_info(void)
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{
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/* This isn't directly accessed outside this function */
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DPCPU_DEFINE_STATIC(vcpu_info_t, vcpu_local_info)
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__attribute__((aligned(64)));
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vcpu_info_t *vcpu_info = DPCPU_PTR(vcpu_local_info);
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vcpu_register_vcpu_info_t info = {
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.mfn = vtophys(vcpu_info) >> PAGE_SHIFT,
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.offset = vtophys(vcpu_info) & PAGE_MASK,
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};
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unsigned int cpu = XEN_VCPUID();
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int rc;
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KASSERT(xen_domain(), ("%s(): invoked when not on Xen?", __func__));
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_Static_assert(sizeof(struct vcpu_info) <= 64,
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"struct vcpu_info is larger than supported limit of 64 bytes");
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/*
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* Set the vCPU info.
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*
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* NB: the vCPU info for some vCPUs can be fetched from the shared info
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* page, but in order to make sure the mapping code is correct always
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* attempt to map the vCPU info at a custom place.
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*/
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rc = HYPERVISOR_vcpu_op(VCPUOP_register_vcpu_info, cpu, &info);
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if (rc == 0)
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DPCPU_SET(vcpu_info, vcpu_info);
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else if (cpu < nitems(HYPERVISOR_shared_info->vcpu_info)) {
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static bool warned = false;
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DPCPU_SET(vcpu_info, &HYPERVISOR_shared_info->vcpu_info[cpu]);
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if (bootverbose && !warned) {
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warned = true;
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printf(
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"WARNING: Xen vCPU %u failed to setup vcpu_info rc = %d\n",
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cpu, rc);
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}
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} else
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panic("Unable to register vCPU %u, rc=%d\n", cpu, rc);
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}
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