mirror of
https://github.com/projectacrn/acrn-hypervisor.git
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4fc54f952e
this patch added full context switch support for scheduling, it make sure each VCPU has its own stack, and added host_sp field in struct sched_object to record host stack pointer for each switch out object. Arch related function arch_switch_to is added for context switch. To benefit debugging, a name[] field is also added into struct sched_object. Tracked-On: #2394 Signed-off-by: Jason Chen CJ <jason.cj.chen@intel.com> Acked-by: Xu, Anthony <anthony.xu@intel.com>
37 lines
691 B
C
37 lines
691 B
C
/*
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* Copyright (C) 2019 Intel Corporation. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <types.h>
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#include <spinlock.h>
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#include <list.h>
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#include <schedule.h>
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void arch_switch_to(struct sched_object *prev, struct sched_object *next)
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{
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asm volatile ("pushf\n"
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"pushq %%rbx\n"
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"pushq %%rbp\n"
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"pushq %%r12\n"
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"pushq %%r13\n"
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"pushq %%r14\n"
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"pushq %%r15\n"
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"pushq %%rdi\n"
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"movq %%rsp, %0\n"
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"movq %1, %%rsp\n"
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"popq %%rdi\n"
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"popq %%r15\n"
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"popq %%r14\n"
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"popq %%r13\n"
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"popq %%r12\n"
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"popq %%rbp\n"
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"popq %%rbx\n"
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"popf\n"
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"retq\n"
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: "=m"(prev->host_sp)
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: "r"(next->host_sp)
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: "memory");
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}
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