Messages in this thread | | | Date | Tue, 19 Mar 2013 19:39:24 +0100 | From | Paolo Bonzini <> | Subject | Re: [PATCH] x86: let userspace inject interrupts into the local APIC |
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Il 19/03/2013 19:13, Gleb Natapov ha scritto: >> > There is no way for userspace to inject interrupts into a VCPU's >> > local APIC, which is important in order to inject INITs coming from >> > the chipset. KVM_INTERRUPT is currently disabled when the in-kernel >> > local APIC is used, so we can repurpose it. The shorthand destination >> > field must contain APIC_DEST_SELF, which has a double effect: first, >> > the ICR2 register is not used and the 32-bit field of KVM_INTERRUPT is >> > enough; second, it ensures that the valid range of the irq field is >> > distinct in the userspace-APIC and kernel-APIC cases. >> > > Init coming from triggering INIT# line should not be modeled as INIT coming from > APIC.
Then Jan's patch was wrong, and INIT should not have been an apic event (perhaps SIPI should).
> In fact INIT cannot be send using SELF shorthand.
Where does the SDM say that?
Paolo
> If APIC code will be fixed to check for that this code will break.
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