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ptdev: change the ptdev_lock from per-vm to global

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this patch is a preparation for changing ptdev remapping entry from
virtual to physical based, it changes the ptdev_lock from per-vm to
global, as entries based on physical mode are global resource.

Signed-off-by: Jason Chen CJ <jason.cj.chen@intel.com>
This commit is contained in:
Jason Chen CJ 2018-03-26 03:45:53 +08:00 committed by lijinxia
parent 7aae57a154
commit 7cc420161c
3 changed files with 31 additions and 43 deletions
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71
arch/x86/assign.c
View File

@ -42,12 +42,13 @@
static struct list_head softirq_dev_entry_list;
/* passthrough device link */
static struct list_head ptdev_list;
static spinlock_t ptdev_lock;
/*
* entry could both be in ptdev_list and softirq_dev_entry_list.
* When release entry, we need make sure entry deleted from both
* lists. We have to require two locks and the lock sequence is:
* vm->ptdev_lock
* ptdev_lock
* softirq_dev_lock
*/
static spinlock_t softirq_dev_lock;
@ -115,9 +116,9 @@ get_remapping_entry(struct vm *vm, uint32_t id)
{
struct ptdev_remapping_info *entry;
spinlock_obtain(&vm->ptdev_lock);
spinlock_obtain(&ptdev_lock);
entry = _get_remapping_entry(vm, id);
spinlock_release(&vm->ptdev_lock);
spinlock_release(&ptdev_lock);
return entry;
}
@ -297,7 +298,7 @@ static void check_deactive_pic_intx(struct vm *vm, uint8_t phys_pin)
if (phys_pin >= NR_LEGACY_IRQ)
return;
spinlock_obtain(&vm->ptdev_lock);
spinlock_obtain(&ptdev_lock);
list_for_each(pos, &ptdev_list) {
entry = list_entry(pos, struct ptdev_remapping_info,
entry_node);
@ -315,7 +316,7 @@ static void check_deactive_pic_intx(struct vm *vm, uint8_t phys_pin)
entry->vm->attr.id, entry->intx.virt_pin);
}
}
spinlock_release(&vm->ptdev_lock);
spinlock_release(&ptdev_lock);
}
static bool ptdev_native_owned_intx(struct vm *vm, struct ptdev_intx_info *info)
@ -430,7 +431,7 @@ add_msix_remapping(struct vm *vm, uint16_t virt_bdf, uint16_t phys_bdf,
{
struct ptdev_remapping_info *entry;
spinlock_obtain(&vm->ptdev_lock);
spinlock_obtain(&ptdev_lock);
entry = _get_remapping_entry(vm,
entry_id_from_msix(virt_bdf, msix_entry_index));
if (!entry) {
@ -439,7 +440,7 @@ add_msix_remapping(struct vm *vm, uint16_t virt_bdf, uint16_t phys_bdf,
entry->phys_bdf = phys_bdf;
entry->msi.msix_entry_index = msix_entry_index;
}
spinlock_release(&vm->ptdev_lock);
spinlock_release(&ptdev_lock);
dev_dbg(ACRN_DBG_IRQ,
"VM%d MSIX add vector mapping vbdf%x:pbdf%x idx=%d",
@ -453,7 +454,7 @@ remove_msix_remapping(struct vm *vm, uint16_t virt_bdf, int msix_entry_index)
{
struct ptdev_remapping_info *entry;
spinlock_obtain(&vm->ptdev_lock);
spinlock_obtain(&ptdev_lock);
entry = _get_remapping_entry(vm,
entry_id_from_msix(virt_bdf, msix_entry_index));
if (!entry)
@ -471,7 +472,7 @@ remove_msix_remapping(struct vm *vm, uint16_t virt_bdf, int msix_entry_index)
release_entry(entry);
END:
spinlock_release(&vm->ptdev_lock);
spinlock_release(&ptdev_lock);
}
@ -483,7 +484,7 @@ add_intx_remapping(struct vm *vm, uint8_t virt_pin, uint8_t phys_pin, bool pic_p
enum ptdev_vpin_source vpin_src =
pic_pin ? PTDEV_VPIN_PIC : PTDEV_VPIN_IOAPIC;
spinlock_obtain(&vm->ptdev_lock);
spinlock_obtain(&ptdev_lock);
entry = _get_remapping_entry(vm,
entry_id_from_intx(virt_pin, vpin_src));
if (!entry) {
@ -494,7 +495,7 @@ add_intx_remapping(struct vm *vm, uint8_t virt_pin, uint8_t phys_pin, bool pic_p
/* update existing */
entry->intx.virt_pin = virt_pin;
entry->intx.phys_pin = phys_pin;
spinlock_release(&vm->ptdev_lock);
spinlock_release(&ptdev_lock);
dev_dbg(ACRN_DBG_IRQ,
"VM%d INTX add pin mapping vpin%d:ppin%d",
@ -511,7 +512,7 @@ void remove_intx_remapping(struct vm *vm, uint8_t virt_pin, bool pic_pin)
enum ptdev_vpin_source vpin_src =
pic_pin ? PTDEV_VPIN_PIC : PTDEV_VPIN_IOAPIC;
spinlock_obtain(&vm->ptdev_lock);
spinlock_obtain(&ptdev_lock);
entry = _get_remapping_entry(vm,
entry_id_from_intx(virt_pin, vpin_src));
if (!entry)
@ -537,7 +538,7 @@ void remove_intx_remapping(struct vm *vm, uint8_t virt_pin, bool pic_pin)
release_entry(entry);
END:
spinlock_release(&vm->ptdev_lock);
spinlock_release(&ptdev_lock);
}
static void ptdev_intr_handle_irq(struct vm *vm,
@ -860,21 +861,17 @@ void ptdev_init(void)
return;
INIT_LIST_HEAD(&ptdev_list);
spinlock_init(&ptdev_lock);
INIT_LIST_HEAD(&softirq_dev_entry_list);
spinlock_init(&softirq_dev_lock);
}
void ptdev_vm_init(struct vm *vm)
{
spinlock_init(&vm->ptdev_lock);
}
void ptdev_vm_deinit(struct vm *vm)
{
/* VM already down */
spinlock_obtain(&vm->ptdev_lock);
spinlock_obtain(&ptdev_lock);
release_all_entry(vm);
spinlock_release(&vm->ptdev_lock);
spinlock_release(&ptdev_lock);
}
void ptdev_add_intx_remapping(struct vm *vm,
@ -979,33 +976,29 @@ int get_ptdev_info(char *str, int str_max)
uint64_t dest;
bool lvl_tm;
int pin, vpin, bdf, vbdf;
struct list_head *pos, *vm_pos;
struct vm *vm;
struct list_head *pos;
len = snprintf(str, size,
"\r\nVM\tTYPE\tIRQ\tVEC\tDEST\tTM\tPIN\tVPIN\tBDF\tVBDF");
size -= len;
str += len;
spinlock_obtain(&vm_list_lock);
list_for_each(vm_pos, &vm_list) {
vm = list_entry(vm_pos, struct vm, list);
spinlock_obtain(&vm->ptdev_lock);
list_for_each(pos, &ptdev_list) {
entry = list_entry(pos, struct ptdev_remapping_info,
entry_node);
if (entry_is_active(entry)) {
get_entry_info(entry, type, &irq, &vector,
spinlock_obtain(&ptdev_lock);
list_for_each(pos, &ptdev_list) {
entry = list_entry(pos, struct ptdev_remapping_info,
entry_node);
if (entry_is_active(entry)) {
get_entry_info(entry, type, &irq, &vector,
&dest, &lvl_tm, &pin, &vpin,
&bdf, &vbdf);
len = snprintf(str, size,
len = snprintf(str, size,
"\r\n%d\t%s\t%d\t0x%X\t0x%X",
entry->vm->attr.id, type,
irq, vector, dest);
size -= len;
str += len;
size -= len;
str += len;
len = snprintf(str, size,
len = snprintf(str, size,
"\t%s\t%d\t%d\t%x:%x.%x\t%x:%x.%x",
entry_is_active(entry) ?
(lvl_tm ? "level" : "edge") : "none",
@ -1014,13 +1007,11 @@ int get_ptdev_info(char *str, int str_max)
(bdf & 0xf8) >> 3, bdf & 0x7,
(vbdf & 0xff00) >> 8,
(vbdf & 0xf8) >> 3, vbdf & 0x7);
size -= len;
str += len;
}
size -= len;
str += len;
}
spinlock_release(&vm->ptdev_lock);
}
spinlock_release(&vm_list_lock);
spinlock_release(&ptdev_lock);
snprintf(str, size, "\r\n");
return 0;

1
arch/x86/guest/vm.c
View File

@ -167,7 +167,6 @@ int create_vm(struct vm_description *vm_desc, struct vm **rtn_vm)
/* Populate return VM handle */
*rtn_vm = vm;
ptdev_vm_init(vm);
vm->sw.req_buf = 0;
status = set_vcpuid_entries(vm);

2
include/arch/x86/guest/vm.h
View File

@ -174,8 +174,6 @@ struct vm {
struct _vm_virtual_device_node *tail;
} virtual_device_list;
spinlock_t ptdev_lock;
unsigned char GUID[16];
struct secure_world_control sworld_control;