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bc5e8e2fa2
Instead of having a pre-filled array xen_irq_ops for Xen PV paravirt functions, drop the array and assign each element individually. This is in preparation of reducing the paravirt include hell by splitting paravirt.h into multiple more fine grained header files, which will in turn require to split up the pv_ops vector as well. Dropping the pre-filled array makes life easier for objtool to detect missing initializers in multiple pv_ops_ arrays. Signed-off-by: Juergen Gross <jgross@suse.com> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Link: https://patch.msgid.link/20260105110520.21356-16-jgross@suse.com
54 lines
1.3 KiB
C
54 lines
1.3 KiB
C
// 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 noinstr 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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void __init xen_init_irq_ops(void)
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{
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/* Initial interrupt flag handling only called while interrupts off. */
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pv_ops.irq.save_fl = __PV_IS_CALLEE_SAVE(paravirt_ret0);
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pv_ops.irq.irq_disable = __PV_IS_CALLEE_SAVE(paravirt_nop);
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pv_ops.irq.irq_enable = __PV_IS_CALLEE_SAVE(BUG_func);
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pv_ops.irq.safe_halt = xen_safe_halt;
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pv_ops.irq.halt = xen_halt;
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x86_init.irqs.intr_init = xen_init_IRQ;
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}
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