From: Binbin Wu <binbin.wu@linux.intel.com>
To: Kishen Maloor <kishen.maloor@intel.com>,
linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Cc: seanjc@google.com, pbonzini@redhat.com,
dave.hansen@linux.intel.com, andrew.cooper3@citrix.com,
nik.borisov@suse.com, kas@kernel.org, rick.p.edgecombe@intel.com,
xiaoyao.li@intel.com, chao.gao@intel.com
Subject: Re: [PATCH v3 2/4] KVM: TDX: Report CORE_CAPABILITIES as configurable
Date: Thu, 3 Sep 2026 16:12:37 +0800 [thread overview]
Message-ID: <d04fee8f-6742-469c-9dfa-6afbc44129a6@linux.intel.com> (raw)
In-Reply-To: <0c2881c6-3352-486d-be59-e6350fda9ad7@intel.com>
On 9/3/2026 2:10 PM, Kishen Maloor wrote:
> On 9/2/26 7:22 PM, Binbin Wu wrote:
>> On 9/3/2026 1:43 AM, Kishen Maloor wrote:
>>> On 8/26/26 8:18 PM, Binbin Wu wrote:
>> ...
>>
>> Actually this is the #VE reduction on fixed-1 bit, which changes a previous fixed-1
>> bit to directly configurable.
>> There are several cases of this category, i.e. MCA/MCE/MTRR/CORE_CAPABILITIES.
>> However, CORE_CAPABILITIES is the only case that KVM doesn't support for non-TDX
>> VMs
>> I will add these info to the change log.
>
>
> The cover letter highlights the deprecation case, but it sounds like
> you hit this now due to #VE reduction. Is further #VE reduction expected?
> If this is altogether rare, then yeah, added measures aren't necessary.
No new #VE reductions are expected.
next prev parent reply other threads:[~2026-09-03 8:12 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-27 3:18 [PATCH v3 0/4] KVM: TDX: Validate directly configurable CPUID bits Binbin Wu
2026-08-27 3:18 ` [PATCH v3 1/4] KVM: TDX: Track configurable CPUID bits allowed by KVM Binbin Wu
2026-09-01 6:29 ` Tony Lindgren
2026-09-01 8:23 ` Binbin Wu
2026-09-01 8:27 ` Tony Lindgren
2026-09-01 14:35 ` Xiaoyao Li
2026-09-02 0:33 ` Binbin Wu
2026-09-02 15:09 ` Xiaoyao Li
2026-09-02 16:19 ` Binbin Wu
2026-09-02 16:22 ` Edgecombe, Rick P
2026-09-02 16:25 ` Binbin Wu
2026-09-03 7:28 ` Xiaoyao Li
2026-09-03 8:57 ` Binbin Wu
2026-09-08 21:13 ` Edgecombe, Rick P
2026-09-09 16:39 ` Xiaoyao Li
2026-09-09 22:29 ` Sean Christopherson
2026-09-09 23:18 ` Edgecombe, Rick P
2026-09-10 2:39 ` Binbin Wu
2026-09-10 2:53 ` Xiaoyao Li
2026-09-08 21:15 ` Edgecombe, Rick P
2026-08-27 3:18 ` [PATCH v3 2/4] KVM: TDX: Report CORE_CAPABILITIES as configurable Binbin Wu
2026-09-01 6:45 ` Tony Lindgren
2026-09-02 17:43 ` Kishen Maloor
2026-09-03 2:22 ` Binbin Wu
2026-09-03 6:10 ` Kishen Maloor
2026-09-03 8:12 ` Binbin Wu [this message]
2026-08-27 3:18 ` [PATCH v3 3/4] KVM: TDX: Filter configurable CPUID bits Binbin Wu
2026-09-01 6:44 ` Tony Lindgren
2026-09-01 8:42 ` Binbin Wu
2026-09-01 9:09 ` Tony Lindgren
2026-09-03 8:04 ` Xiaoyao Li
2026-09-03 8:23 ` Binbin Wu
2026-08-27 3:18 ` [PATCH v3 4/4] KVM: TDX: Validate userspace CPUID input for KVM_TDX_INIT_VM Binbin Wu
2026-08-27 3:24 ` sashiko-bot
2026-08-27 7:25 ` Binbin Wu
2026-09-01 6:47 ` Tony Lindgren
2026-08-27 19:33 ` [PATCH v3 0/4] KVM: TDX: Validate directly configurable CPUID bits Edgecombe, Rick P
2026-08-28 3:19 ` Binbin Wu
2026-08-28 16:58 ` Edgecombe, Rick P
2026-08-31 5:01 ` Binbin Wu
2026-09-01 9:42 ` Xiaoyao Li
2026-09-01 10:21 ` Xiaoyao Li
2026-09-02 16:09 ` Edgecombe, Rick P
2026-09-02 16:21 ` Binbin Wu
2026-09-09 1:46 ` Binbin Wu
2026-09-01 9:38 ` Xiaoyao Li
2026-09-01 17:41 ` Edgecombe, Rick P
2026-09-02 10:29 ` Xiaoyao Li
2026-09-02 13:13 ` Edgecombe, Rick P
2026-09-02 13:39 ` Xiaoyao Li
2026-09-02 13:53 ` Edgecombe, Rick P
2026-09-02 14:21 ` Xiaoyao Li
2026-09-02 16:26 ` Binbin Wu
2026-09-08 9:42 ` Artem Bityutskiy
2026-09-09 0:04 ` Binbin Wu
2026-09-08 20:30 ` Artem Bityutskiy
2026-09-08 22:31 ` Edgecombe, Rick P
2026-09-09 6:52 ` Artem Bityutskiy
2026-09-09 8:48 ` Binbin Wu
2026-09-09 11:20 ` Artem Bityutskiy
2026-09-10 2:54 ` Binbin Wu
2026-09-08 23:54 ` Binbin Wu
2026-09-09 5:37 ` Binbin Wu
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