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HV: modify code for intr storm detect & handling

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This patch is to enhance the feature of "interrupt storm
mitigation"; when interrupt storm happens on one UOS
it should keep as smaller effect to SOS as possible.

Add variables in PTdev entry & VM, used to record one
UOS's pass-thru devices' interrupt data; add a function
to collect the data.

Also add a timer used to delay UOS pass-thru devices'
interrupt injection if an "interrupt storm" detected
by SOS.

Tracked-On: #866
Signed-off-by: Minggui Cao <minggui.cao@intel.com>
Reviewed-by: Li Fei1 <fei1.li@intel.com>
Acked-by: Anthony Xu <anthony.xu@intel.com>
This commit is contained in:
Minggui Cao
2018-09-13 16:31:17 +08:00
committed by lijinxia
parent de68ee7a09
commit 918403f925
5 changed files with 76 additions and 1 deletions
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6
hypervisor/include/common/ptdev.h
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@@ -61,6 +61,9 @@ struct ptdev_remapping_info {
struct list_head softirq_node;
struct list_head entry_node;
struct ptdev_msi_info msi;
uint64_t intr_count;
struct hv_timer intr_delay_timer; /* used for delay intr injection */
};
extern struct list_head ptdev_list;
@@ -83,4 +86,7 @@ void ptdev_deactivate_entry(struct ptdev_remapping_info *entry);
void get_ptdev_info(char *str_arg, int str_max);
#endif /* HV_DEBUG */
uint32_t get_vm_ptdev_intr_data(const struct vm *target_vm, uint64_t *buffer,
uint32_t buffer_cnt);
#endif /* PTDEV_H */