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59 lines
1.4 KiB
59 lines
1.4 KiB
// SPDX-License-Identifier: GPL-2.0 |
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#include <linux/hardirq.h> |
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#include <asm/x86_init.h> |
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#include <xen/interface/xen.h> |
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#include <xen/interface/sched.h> |
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#include <xen/interface/vcpu.h> |
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#include <xen/features.h> |
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#include <xen/events.h> |
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#include <asm/xen/hypercall.h> |
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#include <asm/xen/hypervisor.h> |
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#include "xen-ops.h" |
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/* |
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* Force a proper event-channel callback from Xen after clearing the |
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* callback mask. We do this in a very simple manner, by making a call |
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* down into Xen. The pending flag will be checked by Xen on return. |
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*/ |
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noinstr void xen_force_evtchn_callback(void) |
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{ |
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(void)HYPERVISOR_xen_version(0, NULL); |
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} |
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static void xen_safe_halt(void) |
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{ |
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/* Blocking includes an implicit local_irq_enable(). */ |
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if (HYPERVISOR_sched_op(SCHEDOP_block, NULL) != 0) |
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BUG(); |
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} |
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static void xen_halt(void) |
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{ |
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if (irqs_disabled()) |
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HYPERVISOR_vcpu_op(VCPUOP_down, |
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xen_vcpu_nr(smp_processor_id()), NULL); |
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else |
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xen_safe_halt(); |
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} |
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static const typeof(pv_ops) xen_irq_ops __initconst = { |
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.irq = { |
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/* Initial interrupt flag handling only called while interrupts off. */ |
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.save_fl = __PV_IS_CALLEE_SAVE(paravirt_ret0), |
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.irq_disable = __PV_IS_CALLEE_SAVE(paravirt_nop), |
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.irq_enable = __PV_IS_CALLEE_SAVE(paravirt_BUG), |
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.safe_halt = xen_safe_halt, |
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.halt = xen_halt, |
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}, |
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}; |
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void __init xen_init_irq_ops(void) |
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{ |
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pv_ops.irq = xen_irq_ops.irq; |
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x86_init.irqs.intr_init = xen_init_IRQ; |
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}
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