brain-hackers_pepepper-mirror/linux-brain
1
0
Fork 0
mirror of https://github.com/brain-hackers/linux-brain.git synced 2024-06-09 23:36:23 +09:00
Code Issues Projects Releases Wiki Activity
fe38bd6862
linux-brain/virt/kvm/arm/vgic/vgic.h
Marc Zyngier 86a7dae884 KVM: arm/arm64: vgic-its: Check the LPI translation cache on MSI injection 
When performing an MSI injection, let's first check if the translation
is already in the cache. If so, let's inject it quickly without
going through the whole translation process.

Tested-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
2019-08-18 18:38:53 +01:00

323 lines
11 KiB
C
Raw Blame History

/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (C) 2015, 2016 ARM Ltd.
*/
#ifndef __KVM_ARM_VGIC_NEW_H__
#define __KVM_ARM_VGIC_NEW_H__
#include <linux/irqchip/arm-gic-common.h>
#define PRODUCT_ID_KVM 0x4b /* ASCII code K */
#define IMPLEMENTER_ARM 0x43b
#define VGIC_ADDR_UNDEF (-1)
#define IS_VGIC_ADDR_UNDEF(_x) ((_x) == VGIC_ADDR_UNDEF)
#define INTERRUPT_ID_BITS_SPIS 10
#define INTERRUPT_ID_BITS_ITS 16
#define VGIC_PRI_BITS 5
#define vgic_irq_is_sgi(intid) ((intid) < VGIC_NR_SGIS)
#define VGIC_AFFINITY_0_SHIFT 0
#define VGIC_AFFINITY_0_MASK (0xffUL << VGIC_AFFINITY_0_SHIFT)
#define VGIC_AFFINITY_1_SHIFT 8
#define VGIC_AFFINITY_1_MASK (0xffUL << VGIC_AFFINITY_1_SHIFT)
#define VGIC_AFFINITY_2_SHIFT 16
#define VGIC_AFFINITY_2_MASK (0xffUL << VGIC_AFFINITY_2_SHIFT)
#define VGIC_AFFINITY_3_SHIFT 24
#define VGIC_AFFINITY_3_MASK (0xffUL << VGIC_AFFINITY_3_SHIFT)
#define VGIC_AFFINITY_LEVEL(reg, level) \
((((reg) & VGIC_AFFINITY_## level ##_MASK) \
>> VGIC_AFFINITY_## level ##_SHIFT) << MPIDR_LEVEL_SHIFT(level))
/*
* The Userspace encodes the affinity differently from the MPIDR,
* Below macro converts vgic userspace format to MPIDR reg format.
*/
#define VGIC_TO_MPIDR(val) (VGIC_AFFINITY_LEVEL(val, 0) | \
VGIC_AFFINITY_LEVEL(val, 1) | \
VGIC_AFFINITY_LEVEL(val, 2) | \
VGIC_AFFINITY_LEVEL(val, 3))
/*
* As per Documentation/virt/kvm/devices/arm-vgic-v3.txt,
* below macros are defined for CPUREG encoding.
*/
#define KVM_REG_ARM_VGIC_SYSREG_OP0_MASK 0x000000000000c000
#define KVM_REG_ARM_VGIC_SYSREG_OP0_SHIFT 14
#define KVM_REG_ARM_VGIC_SYSREG_OP1_MASK 0x0000000000003800
#define KVM_REG_ARM_VGIC_SYSREG_OP1_SHIFT 11
#define KVM_REG_ARM_VGIC_SYSREG_CRN_MASK 0x0000000000000780
#define KVM_REG_ARM_VGIC_SYSREG_CRN_SHIFT 7
#define KVM_REG_ARM_VGIC_SYSREG_CRM_MASK 0x0000000000000078
#define KVM_REG_ARM_VGIC_SYSREG_CRM_SHIFT 3
#define KVM_REG_ARM_VGIC_SYSREG_OP2_MASK 0x0000000000000007
#define KVM_REG_ARM_VGIC_SYSREG_OP2_SHIFT 0
#define KVM_DEV_ARM_VGIC_SYSREG_MASK (KVM_REG_ARM_VGIC_SYSREG_OP0_MASK | \
KVM_REG_ARM_VGIC_SYSREG_OP1_MASK | \
KVM_REG_ARM_VGIC_SYSREG_CRN_MASK | \
KVM_REG_ARM_VGIC_SYSREG_CRM_MASK | \
KVM_REG_ARM_VGIC_SYSREG_OP2_MASK)
/*
* As per Documentation/virt/kvm/devices/arm-vgic-its.txt,
* below macros are defined for ITS table entry encoding.
*/
#define KVM_ITS_CTE_VALID_SHIFT 63
#define KVM_ITS_CTE_VALID_MASK BIT_ULL(63)
#define KVM_ITS_CTE_RDBASE_SHIFT 16
#define KVM_ITS_CTE_ICID_MASK GENMASK_ULL(15, 0)
#define KVM_ITS_ITE_NEXT_SHIFT 48
#define KVM_ITS_ITE_PINTID_SHIFT 16
#define KVM_ITS_ITE_PINTID_MASK GENMASK_ULL(47, 16)
#define KVM_ITS_ITE_ICID_MASK GENMASK_ULL(15, 0)
#define KVM_ITS_DTE_VALID_SHIFT 63
#define KVM_ITS_DTE_VALID_MASK BIT_ULL(63)
#define KVM_ITS_DTE_NEXT_SHIFT 49
#define KVM_ITS_DTE_NEXT_MASK GENMASK_ULL(62, 49)
#define KVM_ITS_DTE_ITTADDR_SHIFT 5
#define KVM_ITS_DTE_ITTADDR_MASK GENMASK_ULL(48, 5)
#define KVM_ITS_DTE_SIZE_MASK GENMASK_ULL(4, 0)
#define KVM_ITS_L1E_VALID_MASK BIT_ULL(63)
/* we only support 64 kB translation table page size */
#define KVM_ITS_L1E_ADDR_MASK GENMASK_ULL(51, 16)
#define KVM_VGIC_V3_RDIST_INDEX_MASK GENMASK_ULL(11, 0)
#define KVM_VGIC_V3_RDIST_FLAGS_MASK GENMASK_ULL(15, 12)
#define KVM_VGIC_V3_RDIST_FLAGS_SHIFT 12
#define KVM_VGIC_V3_RDIST_BASE_MASK GENMASK_ULL(51, 16)
#define KVM_VGIC_V3_RDIST_COUNT_MASK GENMASK_ULL(63, 52)
#define KVM_VGIC_V3_RDIST_COUNT_SHIFT 52
#ifdef CONFIG_DEBUG_SPINLOCK
#define DEBUG_SPINLOCK_BUG_ON(p) BUG_ON(p)
#else
#define DEBUG_SPINLOCK_BUG_ON(p)
#endif
/* Requires the irq_lock to be held by the caller. */
static inline bool irq_is_pending(struct vgic_irq *irq)
{
if (irq->config == VGIC_CONFIG_EDGE)
return irq->pending_latch;
else
return irq->pending_latch || irq->line_level;
}
static inline bool vgic_irq_is_mapped_level(struct vgic_irq *irq)
{
return irq->config == VGIC_CONFIG_LEVEL && irq->hw;
}
static inline int vgic_irq_get_lr_count(struct vgic_irq *irq)
{
/* Account for the active state as an interrupt */
if (vgic_irq_is_sgi(irq->intid) && irq->source)
return hweight8(irq->source) + irq->active;
return irq_is_pending(irq) || irq->active;
}
static inline bool vgic_irq_is_multi_sgi(struct vgic_irq *irq)
{
return vgic_irq_get_lr_count(irq) > 1;
}
/*
* This struct provides an intermediate representation of the fields contained
* in the GICH_VMCR and ICH_VMCR registers, such that code exporting the GIC
* state to userspace can generate either GICv2 or GICv3 CPU interface
* registers regardless of the hardware backed GIC used.
*/
struct vgic_vmcr {
u32 grpen0;
u32 grpen1;
u32 ackctl;
u32 fiqen;
u32 cbpr;
u32 eoim;
u32 abpr;
u32 bpr;
u32 pmr; /* Priority mask field in the GICC_PMR and
* ICC_PMR_EL1 priority field format */
};
struct vgic_reg_attr {
struct kvm_vcpu *vcpu;
gpa_t addr;
};
int vgic_v3_parse_attr(struct kvm_device *dev, struct kvm_device_attr *attr,
struct vgic_reg_attr *reg_attr);
int vgic_v2_parse_attr(struct kvm_device *dev, struct kvm_device_attr *attr,
struct vgic_reg_attr *reg_attr);
const struct vgic_register_region *
vgic_get_mmio_region(struct kvm_vcpu *vcpu, struct vgic_io_device *iodev,
gpa_t addr, int len);
struct vgic_irq *vgic_get_irq(struct kvm *kvm, struct kvm_vcpu *vcpu,
u32 intid);
void __vgic_put_lpi_locked(struct kvm *kvm, struct vgic_irq *irq);
void vgic_put_irq(struct kvm *kvm, struct vgic_irq *irq);
bool vgic_get_phys_line_level(struct vgic_irq *irq);
void vgic_irq_set_phys_pending(struct vgic_irq *irq, bool pending);
void vgic_irq_set_phys_active(struct vgic_irq *irq, bool active);
bool vgic_queue_irq_unlock(struct kvm *kvm, struct vgic_irq *irq,
unsigned long flags);
void vgic_kick_vcpus(struct kvm *kvm);
int vgic_check_ioaddr(struct kvm *kvm, phys_addr_t *ioaddr,
phys_addr_t addr, phys_addr_t alignment);
void vgic_v2_fold_lr_state(struct kvm_vcpu *vcpu);
void vgic_v2_populate_lr(struct kvm_vcpu *vcpu, struct vgic_irq *irq, int lr);
void vgic_v2_clear_lr(struct kvm_vcpu *vcpu, int lr);
void vgic_v2_set_underflow(struct kvm_vcpu *vcpu);
void vgic_v2_set_npie(struct kvm_vcpu *vcpu);
int vgic_v2_has_attr_regs(struct kvm_device *dev, struct kvm_device_attr *attr);
int vgic_v2_dist_uaccess(struct kvm_vcpu *vcpu, bool is_write,
int offset, u32 *val);
int vgic_v2_cpuif_uaccess(struct kvm_vcpu *vcpu, bool is_write,
int offset, u32 *val);
void vgic_v2_set_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);
void vgic_v2_get_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);
void vgic_v2_enable(struct kvm_vcpu *vcpu);
int vgic_v2_probe(const struct gic_kvm_info *info);
int vgic_v2_map_resources(struct kvm *kvm);
int vgic_register_dist_iodev(struct kvm *kvm, gpa_t dist_base_address,
enum vgic_type);
void vgic_v2_init_lrs(void);
void vgic_v2_load(struct kvm_vcpu *vcpu);
void vgic_v2_put(struct kvm_vcpu *vcpu);
void vgic_v2_vmcr_sync(struct kvm_vcpu *vcpu);
void vgic_v2_save_state(struct kvm_vcpu *vcpu);
void vgic_v2_restore_state(struct kvm_vcpu *vcpu);
static inline void vgic_get_irq_kref(struct vgic_irq *irq)
{
if (irq->intid < VGIC_MIN_LPI)
return;
kref_get(&irq->refcount);
}
void vgic_v3_fold_lr_state(struct kvm_vcpu *vcpu);
void vgic_v3_populate_lr(struct kvm_vcpu *vcpu, struct vgic_irq *irq, int lr);
void vgic_v3_clear_lr(struct kvm_vcpu *vcpu, int lr);
void vgic_v3_set_underflow(struct kvm_vcpu *vcpu);
void vgic_v3_set_npie(struct kvm_vcpu *vcpu);
void vgic_v3_set_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);
void vgic_v3_get_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);
void vgic_v3_enable(struct kvm_vcpu *vcpu);
int vgic_v3_probe(const struct gic_kvm_info *info);
int vgic_v3_map_resources(struct kvm *kvm);
int vgic_v3_lpi_sync_pending_status(struct kvm *kvm, struct vgic_irq *irq);
int vgic_v3_save_pending_tables(struct kvm *kvm);
int vgic_v3_set_redist_base(struct kvm *kvm, u32 index, u64 addr, u32 count);
int vgic_register_redist_iodev(struct kvm_vcpu *vcpu);
bool vgic_v3_check_base(struct kvm *kvm);
void vgic_v3_load(struct kvm_vcpu *vcpu);
void vgic_v3_put(struct kvm_vcpu *vcpu);
void vgic_v3_vmcr_sync(struct kvm_vcpu *vcpu);
bool vgic_has_its(struct kvm *kvm);
int kvm_vgic_register_its_device(void);
void vgic_enable_lpis(struct kvm_vcpu *vcpu);
void vgic_flush_pending_lpis(struct kvm_vcpu *vcpu);
int vgic_its_inject_msi(struct kvm *kvm, struct kvm_msi *msi);
int vgic_v3_has_attr_regs(struct kvm_device *dev, struct kvm_device_attr *attr);
int vgic_v3_dist_uaccess(struct kvm_vcpu *vcpu, bool is_write,
int offset, u32 *val);
int vgic_v3_redist_uaccess(struct kvm_vcpu *vcpu, bool is_write,
int offset, u32 *val);
int vgic_v3_cpu_sysregs_uaccess(struct kvm_vcpu *vcpu, bool is_write,
u64 id, u64 *val);
int vgic_v3_has_cpu_sysregs_attr(struct kvm_vcpu *vcpu, bool is_write, u64 id,
u64 *reg);
int vgic_v3_line_level_info_uaccess(struct kvm_vcpu *vcpu, bool is_write,
u32 intid, u64 *val);
int kvm_register_vgic_device(unsigned long type);
void vgic_set_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);
void vgic_get_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);
int vgic_lazy_init(struct kvm *kvm);
int vgic_init(struct kvm *kvm);
void vgic_debug_init(struct kvm *kvm);
void vgic_debug_destroy(struct kvm *kvm);
bool lock_all_vcpus(struct kvm *kvm);
void unlock_all_vcpus(struct kvm *kvm);
static inline int vgic_v3_max_apr_idx(struct kvm_vcpu *vcpu)
{
struct vgic_cpu *cpu_if = &vcpu->arch.vgic_cpu;
/*
* num_pri_bits are initialized with HW supported values.
* We can rely safely on num_pri_bits even if VM has not
* restored ICC_CTLR_EL1 before restoring APnR registers.
*/
switch (cpu_if->num_pri_bits) {
case 7: return 3;
case 6: return 1;
default: return 0;
}
}
static inline bool
vgic_v3_redist_region_full(struct vgic_redist_region *region)
{
if (!region->count)
return false;
return (region->free_index >= region->count);
}
struct vgic_redist_region *vgic_v3_rdist_free_slot(struct list_head *rdregs);
static inline size_t
vgic_v3_rd_region_size(struct kvm *kvm, struct vgic_redist_region *rdreg)
{
if (!rdreg->count)
return atomic_read(&kvm->online_vcpus) * KVM_VGIC_V3_REDIST_SIZE;
else
return rdreg->count * KVM_VGIC_V3_REDIST_SIZE;
}
struct vgic_redist_region *vgic_v3_rdist_region_from_index(struct kvm *kvm,
u32 index);
bool vgic_v3_rdist_overlap(struct kvm *kvm, gpa_t base, size_t size);
static inline bool vgic_dist_overlap(struct kvm *kvm, gpa_t base, size_t size)
{
struct vgic_dist *d = &kvm->arch.vgic;
return (base + size > d->vgic_dist_base) &&
(base < d->vgic_dist_base + KVM_VGIC_V3_DIST_SIZE);
}
int vgic_copy_lpi_list(struct kvm *kvm, struct kvm_vcpu *vcpu, u32 **intid_ptr);
int vgic_its_resolve_lpi(struct kvm *kvm, struct vgic_its *its,
u32 devid, u32 eventid, struct vgic_irq **irq);
struct vgic_its *vgic_msi_to_its(struct kvm *kvm, struct kvm_msi *msi);
int vgic_its_inject_cached_translation(struct kvm *kvm, struct kvm_msi *msi);
void vgic_lpi_translation_cache_init(struct kvm *kvm);
void vgic_lpi_translation_cache_destroy(struct kvm *kvm);
void vgic_its_invalidate_cache(struct kvm *kvm);
bool vgic_supports_direct_msis(struct kvm *kvm);
int vgic_v4_init(struct kvm *kvm);
void vgic_v4_teardown(struct kvm *kvm);
int vgic_v4_sync_hwstate(struct kvm_vcpu *vcpu);
int vgic_v4_flush_hwstate(struct kvm_vcpu *vcpu);
#endif
Reference in New Issue View Git Blame Copy Permalink