From: Chao Gao <chao.gao@intel.com>
To: Dave Hansen <dave.hansen@intel.com>
Cc: <tglx@linutronix.de>, <x86@kernel.org>, <seanjc@google.com>,
<pbonzini@redhat.com>, <linux-kernel@vger.kernel.org>,
<kvm@vger.kernel.org>, <peterz@infradead.org>,
<rick.p.edgecombe@intel.com>, <mlevitsk@redhat.com>,
<weijiang.yang@intel.com>, <john.allen@amd.com>
Subject: Re: [PATCH v2 2/6] x86/fpu/xstate: Add CET supervisor mode state support
Date: Wed, 5 Mar 2025 16:32:43 +0800 [thread overview]
Message-ID: <Z8gMK0IMWpLIkgMu@intel.com> (raw)
In-Reply-To: <866757ec-3a05-4360-b35d-5ab8e66ab6c5@intel.com>
On Tue, Mar 04, 2025 at 02:26:01PM -0800, Dave Hansen wrote:
>On 11/26/24 02:17, Chao Gao wrote:
>...
>> The alternative is to enable it in KVM domain, but KVM maintainers NAKed
>> the solution. The external discussion can be found at [*], it ended up
>> with adding the support in kernel instead of KVM domain.
>So, there's a lot of changelog here, but scant details.
Let me refine the changelog to ensure it's clear and concise and includes all
necessary details.
>
>This patch enables XFEATURE_CET_KERNEL everywhere it's available, right?
Yes
>So, this patch at least wastes the XSAVE buffer space and doesn't
>actually get anything. Right?
Yes
next prev parent reply other threads:[~2025-03-05 8:33 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-11-26 10:17 [PATCH v2 0/6] Introduce CET supervisor state support Chao Gao
2024-11-26 10:17 ` [PATCH v2 1/6] x86/fpu/xstate: Always preserve non-user xfeatures/flags in __state_perm Chao Gao
2025-03-04 22:20 ` Dave Hansen
2025-03-05 8:25 ` Chao Gao
2024-11-26 10:17 ` [PATCH v2 2/6] x86/fpu/xstate: Add CET supervisor mode state support Chao Gao
2025-03-04 22:26 ` Dave Hansen
2025-03-05 8:32 ` Chao Gao [this message]
2024-11-26 10:17 ` [PATCH v2 3/6] x86/fpu/xstate: Introduce XFEATURE_MASK_KERNEL_DYNAMIC xfeature set Chao Gao
2025-03-04 22:37 ` Dave Hansen
2025-03-05 8:43 ` Chao Gao
2024-11-26 10:17 ` [PATCH v2 4/6] x86/fpu/xstate: Introduce fpu_guest_cfg for guest FPU configuration Chao Gao
2025-03-04 22:50 ` Dave Hansen
2025-03-05 8:57 ` Chao Gao
2024-11-26 10:17 ` [PATCH v2 5/6] x86/fpu/xstate: Create guest fpstate with guest specific config Chao Gao
2025-03-04 23:02 ` Dave Hansen
2025-03-05 9:04 ` Chao Gao
2024-11-26 10:17 ` [PATCH v2 6/6] x86/fpu/xstate: Warn if CET supervisor state is detected in normal fpstate Chao Gao
2024-11-26 10:28 ` [PATCH v2 0/6] Introduce CET supervisor state support Chao Gao
2025-01-11 1:26 ` Sean Christopherson
2025-02-11 2:09 ` Xin Li
2025-03-04 19:40 ` Xin Li
2025-03-04 19:53 ` Sean Christopherson
2025-02-19 1:44 ` Chao Gao
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