From: Sean Christopherson <seanjc@google.com>
To: Xiaoyao Li <xiaoyao.li@intel.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
Binbin Wu <binbin.wu@linux.intel.com>,
Ira Weiny <ira.weiny@intel.com>,
"H. Peter Anvin" <hpa@zytor.com>, Sagi Shahar <sagis@google.com>,
linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
x86@kernel.org
Subject: Re: [PATCH v2] KVM: TDX: Force split irqchip for TDX at irqchip creation time
Date: Tue, 16 Sep 2025 12:59:33 -0700 [thread overview]
Message-ID: <aMnBpRnI4fNx390T@google.com> (raw)
In-Reply-To: <2e0b5ee6-deae-4eba-89dc-4abfd63b1578@intel.com>
On Tue, Sep 16, 2025, Xiaoyao Li wrote:
> On 9/16/2025 8:25 AM, Sean Christopherson wrote:
> > On Tue, 26 Aug 2025 18:17:26 -0700, Sagi Shahar wrote:
> > > TDX module protects the EOI-bitmap which prevents the use of in-kernel
> > > I/O APIC. See more details in the original patch [1]
> > >
> > > The current implementation already enforces the use of split irqchip for
> > > TDX but it does so at the vCPU creation time which is generally to late
> > > to fallback to split irqchip.
> > >
> > > [...]
> >
> > Applied to kvm-x86 misc, thanks!
>
> The latest one of this patch is v4:
>
> https://lore.kernel.org/all/20250904062007.622530-1-sagis@google.com/
Yeah, I had applied v2 quite some time ago, just took me a while to do final
testing and send the "thank you".
> > [1/1] KVM: TDX: Force split irqchip for TDX at irqchip creation time
> > https://github.com/kvm-x86/linux/commit/2569c8c5767b
>
> What got queued, added a superfluous new line in tdx_vm_init()
Drat. I force pushed to fix that goof, and added Kai's Acked-by in the process.
[1/1] KVM: TDX: Reject fully in-kernel irqchip if EOIs are protected, i.e. for TDX VMs
https://github.com/kvm-x86/linux/commit/b3a37bff8daf
prev parent reply other threads:[~2025-09-16 19:59 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-27 1:17 [PATCH v2] KVM: TDX: Force split irqchip for TDX at irqchip creation time Sagi Shahar
2025-08-27 1:41 ` Binbin Wu
2025-08-27 6:22 ` Xiaoyao Li
2025-09-16 0:25 ` Sean Christopherson
2025-09-16 5:22 ` Xiaoyao Li
2025-09-16 19:59 ` Sean Christopherson [this message]
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