mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-11-01 17:08:10 +00:00
Code Issues Releases Wiki Activity
linux-stable/include/linux/irqchip/arm-vgic-info.h

46 lines
1,001 B
C
Raw Normal View History

irqchip/gic: Split vGIC probing information from the GIC code The vGIC advertising code is unsurprisingly very much tied to the GIC implementations. However, we are about to extend the support to lesser implementations. Let's dissociate the vgic registration from the GIC code and move it into KVM, where it makes a bit more sense. This also allows us to mark the gic_kvm_info structures as __initdata. Reviewed-by: Alexandru Elisei <alexandru.elisei@arm.com> Signed-off-by: Marc Zyngier <maz@kernel.org>
2021-02-27 10:23:45 +00:00
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* include/linux/irqchip/arm-vgic-info.h
*
* Copyright (C) 2016 ARM Limited, All Rights Reserved.
*/
#ifndef __LINUX_IRQCHIP_ARM_VGIC_INFO_H
#define __LINUX_IRQCHIP_ARM_VGIC_INFO_H
#include <linux/types.h>
#include <linux/ioport.h>
enum gic_type {
/* Full GICv2 */
GIC_V2,
/* Full GICv3, optionally with v2 compat */
GIC_V3,
};
struct gic_kvm_info {
/* GIC type */
enum gic_type type;
/* Virtual CPU interface */
struct resource vcpu;
/* Interrupt number */
unsigned int maint_irq;
KVM: arm64: vgic: Be tolerant to the lack of maintenance interrupt masking As it turns out, not all the interrupt controllers are able to expose a vGIC maintenance interrupt that can be independently enabled/disabled. And to be fair, it doesn't really matter as all we require is for the interrupt to kick us out of guest mode out way or another. To that effect, add gic_kvm_info.no_maint_irq_mask for an interrupt controller to advertise the lack of masking. Signed-off-by: Marc Zyngier <maz@kernel.org>
2021-02-28 11:09:59 +00:00
/* No interrupt mask, no need to use the above field */
bool no_maint_irq_mask;
irqchip/gic: Split vGIC probing information from the GIC code The vGIC advertising code is unsurprisingly very much tied to the GIC implementations. However, we are about to extend the support to lesser implementations. Let's dissociate the vgic registration from the GIC code and move it into KVM, where it makes a bit more sense. This also allows us to mark the gic_kvm_info structures as __initdata. Reviewed-by: Alexandru Elisei <alexandru.elisei@arm.com> Signed-off-by: Marc Zyngier <maz@kernel.org>
2021-02-27 10:23:45 +00:00
/* Virtual control interface */
struct resource vctrl;
/* vlpi support */
bool has_v4;
/* rvpeid support */
bool has_v4_1;
KVM: arm64: vgic: Let an interrupt controller advertise lack of HW deactivation The vGIC, as architected by ARM, allows a virtual interrupt to trigger the deactivation of a physical interrupt. This allows the following interrupt to be delivered without requiring an exit. However, some implementations have choosen not to implement this, meaning that we will need some unsavoury workarounds to deal with this. On detecting such a case, taint the kernel and spit a nastygram. We'll deal with this in later patches. Signed-off-by: Marc Zyngier <maz@kernel.org>
2021-03-15 21:56:47 +00:00
/* Deactivation impared, subpar stuff */
bool no_hw_deactivation;
irqchip/gic: Split vGIC probing information from the GIC code The vGIC advertising code is unsurprisingly very much tied to the GIC implementations. However, we are about to extend the support to lesser implementations. Let's dissociate the vgic registration from the GIC code and move it into KVM, where it makes a bit more sense. This also allows us to mark the gic_kvm_info structures as __initdata. Reviewed-by: Alexandru Elisei <alexandru.elisei@arm.com> Signed-off-by: Marc Zyngier <maz@kernel.org>
2021-02-27 10:23:45 +00:00
};
#ifdef CONFIG_KVM
void vgic_set_kvm_info(const struct gic_kvm_info *info);
#else
static inline void vgic_set_kvm_info(const struct gic_kvm_info *info) {}
#endif
#endif
Reference in a new issue Copy permalink