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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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1
hypervisor/arch/x86/guest/vm.c
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@@ -187,6 +187,7 @@ int create_vm(struct vm_description *vm_desc, struct vm **rtn_vm)
INIT_LIST_HEAD(&vm->softirq_dev_entry_list);
spinlock_init(&vm->softirq_dev_lock);
vm->intr_inject_delay_delta = 0UL;
/* Set up IO bit-mask such that VM exit occurs on
* selected IO ranges