Re: [RFC PATCH v4 28/36] i386/tdx: Disable PIC for TDX VMs

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On Thu, May 12, 2022 at 11:17:55AM +0800, Xiaoyao Li wrote:
> Legacy PIC (8259) cannot be supported for TDX VMs since TDX module
> doesn't allow directly interrupt injection.  Using posted interrupts
> for the PIC is not a viable option as the guest BIOS/kernel will not
> do EOI for PIC IRQs, i.e. will leave the vIRR bit set.
> 
> Hence disable PIC for TDX VMs and error out if user wants PIC.

Acked-by: Gerd Hoffmann <kraxel@xxxxxxxxxx>




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