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Re: [PATCH 1/2] x86/vmx: Fix IRQ handling for EXIT_REASON_INIT
- To: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Thu, 11 Jan 2024 08:48:02 +0100
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- Cc: Reima ISHII <ishiir@xxxxxxxxxxxxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, Jun Nakajima <jun.nakajima@xxxxxxxxx>, Kevin Tian <kevin.tian@xxxxxxxxx>, Tamas K Lengyel <tamas@xxxxxxxxxxxxx>, Takahiro Shinagawa <shina@xxxxxxxxxxxxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- Delivery-date: Thu, 11 Jan 2024 07:48:19 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 10.01.2024 20:11, Andrew Cooper wrote:
> On 02/11/2023 8:57 am, Jan Beulich wrote:
>> On 01.11.2023 20:20, Andrew Cooper wrote:
>>> --- a/xen/arch/x86/hvm/vmx/vmx.c
>>> +++ b/xen/arch/x86/hvm/vmx/vmx.c
>>> @@ -4097,10 +4097,6 @@ void vmx_vmexit_handler(struct cpu_user_regs *regs)
>>> case EXIT_REASON_MCE_DURING_VMENTRY:
>>> do_machine_check(regs);
>>> break;
>>> -
>>> - case EXIT_REASON_INIT:
>>> - printk(XENLOG_ERR "Error: INIT received - ignoring\n");
>>> - return; /* Renter the guest without further processing */
>>> }
>> Wouldn't the printk() better remain where it was, and just the "return" be
>> purged?
>
> Not really... that would hit the unknown vmexit path in the second.
Well, I didn't mean to suggest to purge the other hunk. Instead I meant ...
> We actually have a variety of empty cases in the second. We could add
> another.
... something along these lines - do nothing but "break;" there.
Jan
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