mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-24 09:30:52 +07:00
f515241652
Similar to the commit 02d715b4a8 ("iommu/vt-d: Fix RCU list debugging
warnings"), there are several other places that call
list_for_each_entry_rcu() outside of an RCU read side critical section
but with dmar_global_lock held. Silence those false positives as well.
drivers/iommu/intel-iommu.c:4288 RCU-list traversed in non-reader section!!
1 lock held by swapper/0/1:
#0: ffffffff935892c8 (dmar_global_lock){+.+.}, at: intel_iommu_init+0x1ad/0xb97
drivers/iommu/dmar.c:366 RCU-list traversed in non-reader section!!
1 lock held by swapper/0/1:
#0: ffffffff935892c8 (dmar_global_lock){+.+.}, at: intel_iommu_init+0x125/0xb97
drivers/iommu/intel-iommu.c:5057 RCU-list traversed in non-reader section!!
1 lock held by swapper/0/1:
#0: ffffffffa71892c8 (dmar_global_lock){++++}, at: intel_iommu_init+0x61a/0xb13
Signed-off-by: Qian Cai <cai@lca.pw>
Acked-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
286 lines
7.6 KiB
C
286 lines
7.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Copyright (c) 2006, Intel Corporation.
|
|
*
|
|
* Copyright (C) Ashok Raj <ashok.raj@intel.com>
|
|
* Copyright (C) Shaohua Li <shaohua.li@intel.com>
|
|
*/
|
|
|
|
#ifndef __DMAR_H__
|
|
#define __DMAR_H__
|
|
|
|
#include <linux/acpi.h>
|
|
#include <linux/types.h>
|
|
#include <linux/msi.h>
|
|
#include <linux/irqreturn.h>
|
|
#include <linux/rwsem.h>
|
|
#include <linux/rculist.h>
|
|
|
|
struct acpi_dmar_header;
|
|
|
|
#ifdef CONFIG_X86
|
|
# define DMAR_UNITS_SUPPORTED MAX_IO_APICS
|
|
#else
|
|
# define DMAR_UNITS_SUPPORTED 64
|
|
#endif
|
|
|
|
/* DMAR Flags */
|
|
#define DMAR_INTR_REMAP 0x1
|
|
#define DMAR_X2APIC_OPT_OUT 0x2
|
|
#define DMAR_PLATFORM_OPT_IN 0x4
|
|
|
|
struct intel_iommu;
|
|
|
|
struct dmar_dev_scope {
|
|
struct device __rcu *dev;
|
|
u8 bus;
|
|
u8 devfn;
|
|
};
|
|
|
|
#ifdef CONFIG_DMAR_TABLE
|
|
extern struct acpi_table_header *dmar_tbl;
|
|
struct dmar_drhd_unit {
|
|
struct list_head list; /* list of drhd units */
|
|
struct acpi_dmar_header *hdr; /* ACPI header */
|
|
u64 reg_base_addr; /* register base address*/
|
|
struct dmar_dev_scope *devices;/* target device array */
|
|
int devices_cnt; /* target device count */
|
|
u16 segment; /* PCI domain */
|
|
u8 ignored:1; /* ignore drhd */
|
|
u8 include_all:1;
|
|
struct intel_iommu *iommu;
|
|
};
|
|
|
|
struct dmar_pci_path {
|
|
u8 bus;
|
|
u8 device;
|
|
u8 function;
|
|
};
|
|
|
|
struct dmar_pci_notify_info {
|
|
struct pci_dev *dev;
|
|
unsigned long event;
|
|
int bus;
|
|
u16 seg;
|
|
u16 level;
|
|
struct dmar_pci_path path[];
|
|
} __attribute__((packed));
|
|
|
|
extern struct rw_semaphore dmar_global_lock;
|
|
extern struct list_head dmar_drhd_units;
|
|
|
|
#define for_each_drhd_unit(drhd) \
|
|
list_for_each_entry_rcu(drhd, &dmar_drhd_units, list, \
|
|
dmar_rcu_check())
|
|
|
|
#define for_each_active_drhd_unit(drhd) \
|
|
list_for_each_entry_rcu(drhd, &dmar_drhd_units, list, \
|
|
dmar_rcu_check()) \
|
|
if (drhd->ignored) {} else
|
|
|
|
#define for_each_active_iommu(i, drhd) \
|
|
list_for_each_entry_rcu(drhd, &dmar_drhd_units, list, \
|
|
dmar_rcu_check()) \
|
|
if (i=drhd->iommu, drhd->ignored) {} else
|
|
|
|
#define for_each_iommu(i, drhd) \
|
|
list_for_each_entry_rcu(drhd, &dmar_drhd_units, list, \
|
|
dmar_rcu_check()) \
|
|
if (i=drhd->iommu, 0) {} else
|
|
|
|
static inline bool dmar_rcu_check(void)
|
|
{
|
|
return rwsem_is_locked(&dmar_global_lock) ||
|
|
system_state == SYSTEM_BOOTING;
|
|
}
|
|
|
|
#define dmar_rcu_dereference(p) rcu_dereference_check((p), dmar_rcu_check())
|
|
|
|
#define for_each_dev_scope(devs, cnt, i, tmp) \
|
|
for ((i) = 0; ((tmp) = (i) < (cnt) ? \
|
|
dmar_rcu_dereference((devs)[(i)].dev) : NULL, (i) < (cnt)); \
|
|
(i)++)
|
|
|
|
#define for_each_active_dev_scope(devs, cnt, i, tmp) \
|
|
for_each_dev_scope((devs), (cnt), (i), (tmp)) \
|
|
if (!(tmp)) { continue; } else
|
|
|
|
extern int dmar_table_init(void);
|
|
extern int dmar_dev_scope_init(void);
|
|
extern void dmar_register_bus_notifier(void);
|
|
extern int dmar_parse_dev_scope(void *start, void *end, int *cnt,
|
|
struct dmar_dev_scope **devices, u16 segment);
|
|
extern void *dmar_alloc_dev_scope(void *start, void *end, int *cnt);
|
|
extern void dmar_free_dev_scope(struct dmar_dev_scope **devices, int *cnt);
|
|
extern int dmar_insert_dev_scope(struct dmar_pci_notify_info *info,
|
|
void *start, void*end, u16 segment,
|
|
struct dmar_dev_scope *devices,
|
|
int devices_cnt);
|
|
extern int dmar_remove_dev_scope(struct dmar_pci_notify_info *info,
|
|
u16 segment, struct dmar_dev_scope *devices,
|
|
int count);
|
|
/* Intel IOMMU detection */
|
|
extern int detect_intel_iommu(void);
|
|
extern int enable_drhd_fault_handling(void);
|
|
extern int dmar_device_add(acpi_handle handle);
|
|
extern int dmar_device_remove(acpi_handle handle);
|
|
|
|
static inline int dmar_res_noop(struct acpi_dmar_header *hdr, void *arg)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_INTEL_IOMMU
|
|
extern int iommu_detected, no_iommu;
|
|
extern int intel_iommu_init(void);
|
|
extern void intel_iommu_shutdown(void);
|
|
extern int dmar_parse_one_rmrr(struct acpi_dmar_header *header, void *arg);
|
|
extern int dmar_parse_one_atsr(struct acpi_dmar_header *header, void *arg);
|
|
extern int dmar_check_one_atsr(struct acpi_dmar_header *hdr, void *arg);
|
|
extern int dmar_release_one_atsr(struct acpi_dmar_header *hdr, void *arg);
|
|
extern int dmar_iommu_hotplug(struct dmar_drhd_unit *dmaru, bool insert);
|
|
extern int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info);
|
|
#else /* !CONFIG_INTEL_IOMMU: */
|
|
static inline int intel_iommu_init(void) { return -ENODEV; }
|
|
static inline void intel_iommu_shutdown(void) { }
|
|
|
|
#define dmar_parse_one_rmrr dmar_res_noop
|
|
#define dmar_parse_one_atsr dmar_res_noop
|
|
#define dmar_check_one_atsr dmar_res_noop
|
|
#define dmar_release_one_atsr dmar_res_noop
|
|
|
|
static inline int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int dmar_iommu_hotplug(struct dmar_drhd_unit *dmaru, bool insert)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_INTEL_IOMMU */
|
|
|
|
#ifdef CONFIG_IRQ_REMAP
|
|
extern int dmar_ir_hotplug(struct dmar_drhd_unit *dmaru, bool insert);
|
|
#else /* CONFIG_IRQ_REMAP */
|
|
static inline int dmar_ir_hotplug(struct dmar_drhd_unit *dmaru, bool insert)
|
|
{ return 0; }
|
|
#endif /* CONFIG_IRQ_REMAP */
|
|
|
|
extern bool dmar_platform_optin(void);
|
|
|
|
#else /* CONFIG_DMAR_TABLE */
|
|
|
|
static inline int dmar_device_add(void *handle)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int dmar_device_remove(void *handle)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline bool dmar_platform_optin(void)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
#endif /* CONFIG_DMAR_TABLE */
|
|
|
|
struct irte {
|
|
union {
|
|
/* Shared between remapped and posted mode*/
|
|
struct {
|
|
__u64 present : 1, /* 0 */
|
|
fpd : 1, /* 1 */
|
|
__res0 : 6, /* 2 - 6 */
|
|
avail : 4, /* 8 - 11 */
|
|
__res1 : 3, /* 12 - 14 */
|
|
pst : 1, /* 15 */
|
|
vector : 8, /* 16 - 23 */
|
|
__res2 : 40; /* 24 - 63 */
|
|
};
|
|
|
|
/* Remapped mode */
|
|
struct {
|
|
__u64 r_present : 1, /* 0 */
|
|
r_fpd : 1, /* 1 */
|
|
dst_mode : 1, /* 2 */
|
|
redir_hint : 1, /* 3 */
|
|
trigger_mode : 1, /* 4 */
|
|
dlvry_mode : 3, /* 5 - 7 */
|
|
r_avail : 4, /* 8 - 11 */
|
|
r_res0 : 4, /* 12 - 15 */
|
|
r_vector : 8, /* 16 - 23 */
|
|
r_res1 : 8, /* 24 - 31 */
|
|
dest_id : 32; /* 32 - 63 */
|
|
};
|
|
|
|
/* Posted mode */
|
|
struct {
|
|
__u64 p_present : 1, /* 0 */
|
|
p_fpd : 1, /* 1 */
|
|
p_res0 : 6, /* 2 - 7 */
|
|
p_avail : 4, /* 8 - 11 */
|
|
p_res1 : 2, /* 12 - 13 */
|
|
p_urgent : 1, /* 14 */
|
|
p_pst : 1, /* 15 */
|
|
p_vector : 8, /* 16 - 23 */
|
|
p_res2 : 14, /* 24 - 37 */
|
|
pda_l : 26; /* 38 - 63 */
|
|
};
|
|
__u64 low;
|
|
};
|
|
|
|
union {
|
|
/* Shared between remapped and posted mode*/
|
|
struct {
|
|
__u64 sid : 16, /* 64 - 79 */
|
|
sq : 2, /* 80 - 81 */
|
|
svt : 2, /* 82 - 83 */
|
|
__res3 : 44; /* 84 - 127 */
|
|
};
|
|
|
|
/* Posted mode*/
|
|
struct {
|
|
__u64 p_sid : 16, /* 64 - 79 */
|
|
p_sq : 2, /* 80 - 81 */
|
|
p_svt : 2, /* 82 - 83 */
|
|
p_res3 : 12, /* 84 - 95 */
|
|
pda_h : 32; /* 96 - 127 */
|
|
};
|
|
__u64 high;
|
|
};
|
|
};
|
|
|
|
static inline void dmar_copy_shared_irte(struct irte *dst, struct irte *src)
|
|
{
|
|
dst->present = src->present;
|
|
dst->fpd = src->fpd;
|
|
dst->avail = src->avail;
|
|
dst->pst = src->pst;
|
|
dst->vector = src->vector;
|
|
dst->sid = src->sid;
|
|
dst->sq = src->sq;
|
|
dst->svt = src->svt;
|
|
}
|
|
|
|
#define PDA_LOW_BIT 26
|
|
#define PDA_HIGH_BIT 32
|
|
|
|
/* Can't use the common MSI interrupt functions
|
|
* since DMAR is not a pci device
|
|
*/
|
|
struct irq_data;
|
|
extern void dmar_msi_unmask(struct irq_data *data);
|
|
extern void dmar_msi_mask(struct irq_data *data);
|
|
extern void dmar_msi_read(int irq, struct msi_msg *msg);
|
|
extern void dmar_msi_write(int irq, struct msi_msg *msg);
|
|
extern int dmar_set_interrupt(struct intel_iommu *iommu);
|
|
extern irqreturn_t dmar_fault(int irq, void *dev_id);
|
|
extern int dmar_alloc_hwirq(int id, int node, void *arg);
|
|
extern void dmar_free_hwirq(int irq);
|
|
|
|
#endif /* __DMAR_H__ */
|