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https://github.com/torvalds/linux
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b1c3497e60
Implement support for the HVMOP_set_evtchn_upcall_vector hypercall in order to set the per-vCPU event channel vector callback on Linux and use it in preference of HVM_PARAM_CALLBACK_IRQ. If the per-VCPU vector setup is successful on BSP, use this method for the APs. If not, fallback to the global vector-type callback. Also register callback_irq at per-vCPU event channel setup to trick toolstack to think the domain is enlightened. Suggested-by: "Roger Pau Monné" <roger.pau@citrix.com> Signed-off-by: Jane Malalane <jane.malalane@citrix.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Link: https://lore.kernel.org/r/20220729070416.23306-1-jane.malalane@citrix.com Signed-off-by: Juergen Gross <jgross@suse.com>
28 lines
537 B
C
28 lines
537 B
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/types.h>
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#include <xen/xen.h>
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#include <xen/hvm.h>
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#include <xen/features.h>
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#include <xen/interface/features.h>
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#include <xen/events.h>
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#include "xen-ops.h"
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void xen_hvm_post_suspend(int suspend_cancelled)
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{
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if (!suspend_cancelled) {
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xen_hvm_init_shared_info();
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xen_vcpu_restore();
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}
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if (xen_percpu_upcall) {
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unsigned int cpu;
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for_each_online_cpu(cpu)
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BUG_ON(xen_set_upcall_vector(cpu));
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} else {
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xen_setup_callback_vector();
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}
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xen_unplug_emulated_devices();
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}
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