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hv: apicv: enable interrupt-window if any pending external interrupts

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The external interrupt events only can be inject if RFLAGS.IF = 1 and no
blocking by both STI and MOV SS. If met this scenario, we need to enable
"interrupt-window exiting" for injection in next VMEXIT.

Tracked-On: #1189
Signed-off-by: Yu Wang <yu1.wang@intel.com>
Acked-by: Anthony Xu <anthony.xu@intel.com>
This commit is contained in:
Yu Wang
2018-09-06 03:06:42 +00:00
committed by lijinxia
parent 46c3276ec8
commit 8e296155d5
1 changed files with 11 additions and 2 deletions
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13
hypervisor/arch/x86/virq.c
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@@ -495,9 +495,18 @@ INTR_WIN:
* and automatic inject the virtual interrupts in appropriate time. * and automatic inject the virtual interrupts in appropriate time.
* And from SDM Vol3 29.2.1, the apicv only trigger evaluation of * And from SDM Vol3 29.2.1, the apicv only trigger evaluation of
* pending virtual interrupts when "interrupt-window exiting" is 0. * pending virtual interrupts when "interrupt-window exiting" is 0.
*
* External interrupt(from vpic) can't be delivered by "virtual-
* interrupt delivery", it only deliver interrupt from vlapic.
*
* So need to enable "interrupt-window exiting", when there is
* an ExtInt or there is lapic interrupt and virtual interrupt
* deliver is disabled.
*/ */
if (is_apicv_intr_delivery_supported() || if (!bitmap_test(ACRN_REQUEST_EXTINT,
!vcpu_pending_request(vcpu)) { pending_req_bits) &&
(is_apicv_intr_delivery_supported() ||
!vcpu_pending_request(vcpu))) {
return ret; return ret;
} }