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https://github.com/projectacrn/acrn-hypervisor.git
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a436f72493
Add pre_user_access() and post_user_access() interfaces to protect mmio from hypervisor accidental access, SMAP extensiton need to be detected Tracked-On: #8831 Signed-off-by: hangliu1 <hang1.liu@intel.com> Reviewed-by: Liu, Yifan1 <yifan1.liu@intel.com> Acked-by: Wang, Yu1 <yu1.wang@intel.com>
49 lines
1017 B
C
49 lines
1017 B
C
/*
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* Copyright (C) 2020-2023 Intel Corporation.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <errno.h>
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#include <util.h>
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#include <acrn_hv_defs.h>
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#include <asm/guest/vm.h>
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#include <vm_event.h>
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#include <sbuf.h>
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int32_t init_vm_event(struct acrn_vm *vm, uint64_t *hva)
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{
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struct shared_buf *sbuf = (struct shared_buf *)hva;
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int ret = -1;
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pre_user_access();
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if (sbuf != NULL) {
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if (sbuf->magic == SBUF_MAGIC) {
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vm->sw.vm_event_sbuf = sbuf;
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spinlock_init(&vm->vm_event_lock);
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ret = 0;
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}
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}
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post_user_access();
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return ret;
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}
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int32_t send_vm_event(struct acrn_vm *vm, struct vm_event *event)
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{
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struct shared_buf *sbuf = (struct shared_buf *)vm->sw.vm_event_sbuf;
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int32_t ret = -ENODEV;
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uint32_t size_sent;
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if (sbuf != NULL) {
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spinlock_obtain(&vm->vm_event_lock);
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size_sent = sbuf_put(sbuf, (uint8_t *)event, sizeof(*event));
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spinlock_release(&vm->vm_event_lock);
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if (size_sent == sizeof(struct vm_event)) {
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arch_fire_hsm_interrupt();
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ret = 0;
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}
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}
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return ret;
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}
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