github/acrn-hypervisor
1
0
Fork 0
mirror of https://github.com/projectacrn/acrn-hypervisor.git synced 2025-09-23 09:47:44 +00:00
Code Issues Projects Releases Wiki Activity

hv: ptdev: move softirq_dev_entry_list from vm structure to per_cpu region

Browse Source 
Using per_cpu list to record ptdev interrupts is more reasonable than
recording them per-vm. It makes dispatching such interrupts more easier
as we now do it in softirq which happens following interrupt context of
each pcpu.

Tracked-On: #3663
Signed-off-by: Jason Chen CJ <jason.cj.chen@intel.com>
Signed-off-by: Shuo A Liu <shuo.a.liu@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Shuo A Liu
2019-09-03 11:50:01 +08:00
committed by wenlingz
parent 2cc45534d6
commit 4742d1c747
7 changed files with 18 additions and 22 deletions
Download Patch File Download Diff File Expand all files Collapse all files

23
hypervisor/common/ptdev.c
View File

@@ -4,6 +4,7 @@
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <per_cpu.h>
#include <vm.h>
#include <softirq.h>
#include <ptdev.h>
@@ -34,13 +35,13 @@ static void ptirq_enqueue_softirq(struct ptirq_remapping_info *entry)
uint64_t rflags;
/* enqueue request in order, SOFTIRQ_PTDEV will pickup */
spinlock_irqsave_obtain(&entry->vm->softirq_dev_lock, &rflags);
CPU_INT_ALL_DISABLE(&rflags);
/* avoid adding recursively */
list_del(&entry->softirq_node);
/* TODO: assert if entry already in list */
list_add_tail(&entry->softirq_node, &entry->vm->softirq_dev_entry_list);
spinlock_irqrestore_release(&entry->vm->softirq_dev_lock, rflags);
list_add_tail(&entry->softirq_node, &get_cpu_var(softirq_dev_entry_list));
CPU_INT_ALL_RESTORE(rflags);
fire_softirq(SOFTIRQ_PTDEV);
}
@@ -51,15 +52,15 @@ static void ptirq_intr_delay_callback(void *data)
ptirq_enqueue_softirq(entry);
}
struct ptirq_remapping_info *ptirq_dequeue_softirq(struct acrn_vm *vm)
struct ptirq_remapping_info *ptirq_dequeue_softirq(uint16_t pcpu_id)
{
uint64_t rflags;
struct ptirq_remapping_info *entry = NULL;
spinlock_irqsave_obtain(&vm->softirq_dev_lock, &rflags);
CPU_INT_ALL_DISABLE(&rflags);
while (!list_empty(&vm->softirq_dev_entry_list)) {
entry = get_first_item(&vm->softirq_dev_entry_list, struct ptirq_remapping_info, softirq_node);
while (!list_empty(&get_cpu_var(softirq_dev_entry_list))) {
entry = get_first_item(&per_cpu(softirq_dev_entry_list, pcpu_id), struct ptirq_remapping_info, softirq_node);
list_del_init(&entry->softirq_node);
@@ -73,7 +74,7 @@ struct ptirq_remapping_info *ptirq_dequeue_softirq(struct acrn_vm *vm)
}
}
spinlock_irqrestore_release(&vm->softirq_dev_lock, rflags);
CPU_INT_ALL_RESTORE(rflags);
return entry;
}
@@ -106,10 +107,10 @@ void ptirq_release_entry(struct ptirq_remapping_info *entry)
{
uint64_t rflags;
spinlock_irqsave_obtain(&entry->vm->softirq_dev_lock, &rflags);
CPU_INT_ALL_DISABLE(&rflags);
list_del_init(&entry->softirq_node);
del_timer(&entry->intr_delay_timer);
spinlock_irqrestore_release(&entry->vm->softirq_dev_lock, rflags);
CPU_INT_ALL_RESTORE(rflags);
bitmap_clear_nolock((entry->ptdev_entry_id) & 0x3FU,
&ptirq_entry_bitmaps[((entry->ptdev_entry_id) & 0x3FU) >> 6U]);
@@ -176,10 +177,10 @@ void ptirq_deactivate_entry(struct ptirq_remapping_info *entry)
void ptdev_init(void)
{
if (get_pcpu_id() == BOOT_CPU_ID) {
spinlock_init(&ptdev_lock);
register_softirq(SOFTIRQ_PTDEV, ptirq_softirq);
}
INIT_LIST_HEAD(&get_cpu_var(softirq_dev_entry_list));
}
void ptdev_release_all_entries(const struct acrn_vm *vm)