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Re: [RFC PATCH v4 28/36] i386/tdx: Disable PIC for TDX VMs
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From: |
Gerd Hoffmann |
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Subject: |
Re: [RFC PATCH v4 28/36] i386/tdx: Disable PIC for TDX VMs |
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Date: |
Tue, 24 May 2022 10:00:52 +0200 |
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@redhat.com>
- Re: [RFC PATCH v4 23/36] i386/tdx: Setup the TD HOB list, (continued)
- [RFC PATCH v4 27/36] i386/tdx: Disable SMM for TDX VMs, Xiaoyao Li, 2022/05/11
- [RFC PATCH v4 29/36] i386/tdx: Don't allow system reset for TDX VMs, Xiaoyao Li, 2022/05/11
- [RFC PATCH v4 30/36] hw/i386: add eoi_intercept_unsupported member to X86MachineState, Xiaoyao Li, 2022/05/11
- [RFC PATCH v4 26/36] i386/tdx: Finalize TDX VM, Xiaoyao Li, 2022/05/11
- [RFC PATCH v4 28/36] i386/tdx: Disable PIC for TDX VMs, Xiaoyao Li, 2022/05/11
- Re: [RFC PATCH v4 28/36] i386/tdx: Disable PIC for TDX VMs,
Gerd Hoffmann <=
- [RFC PATCH v4 33/36] i386/tdx: Only configure MSR_IA32_UCODE_REV in kvm_init_msrs() for TDs, Xiaoyao Li, 2022/05/11
- [RFC PATCH v4 35/36] i386/tdx: Don't get/put guest state for TDX VMs, Xiaoyao Li, 2022/05/11
- [RFC PATCH v4 32/36] i386/tdx: Don't synchronize guest tsc for TDs, Xiaoyao Li, 2022/05/11
- [RFC PATCH v4 34/36] i386/tdx: Skip kvm_put_apicbase() for TDs, Xiaoyao Li, 2022/05/11
- [RFC PATCH v4 31/36] hw/i386: add option to forcibly report edge trigger in acpi tables, Xiaoyao Li, 2022/05/11
- [RFC PATCH v4 36/36] docs: Add TDX documentation, Xiaoyao Li, 2022/05/11