From: Sean Christopherson <seanjc@google.com>
To: Xin Li <xin@zytor.com>
Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
linux-doc@vger.kernel.org, pbonzini@redhat.com, corbet@lwn.net,
tglx@linutronix.de, mingo@redhat.com, bp@alien8.de,
dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com,
luto@kernel.org, peterz@infradead.org,
andrew.cooper3@citrix.com, chao.gao@intel.com,
hch@infradead.org, sohil.mehta@intel.com
Subject: Re: [PATCH v9 00/22] Enable FRED with KVM VMX
Date: Thu, 13 Nov 2025 14:20:18 -0800 [thread overview]
Message-ID: <aRZZoqxwTBa_16HU@google.com> (raw)
In-Reply-To: <9EF391B5-71E8-4A9C-BD55-B78B5DEE5638@zytor.com>
On Thu, Nov 06, 2025, Xin Li wrote:
>
> > On Oct 26, 2025, at 1:18 PM, Xin Li (Intel) <xin@zytor.com> wrote:
> > Although FRED and CET supervisor shadow stacks are independent CPU
> > features, FRED unconditionally includes FRED shadow stack pointer
> > MSRs IA32_FRED_SSP[0123], and IA32_FRED_SSP0 is just an alias of the
> > CET MSR IA32_PL0_SSP. IOW, the state management of MSR IA32_PL0_SSP
> > becomes an overlap area, and Sean requested that FRED virtualization
> > to land after CET virtualization [1].
> >
> > With CET virtualization now merged in v6.18, the path is clear to submit
> > the FRED virtualization patch series :).
>
> Sean, what is the plan for the FRED patch series?
Review and merge it asap. Unfortunately, "asap" isn't all that soon, mostly
because I've been bogged down with non-upstream stuff. I'm hoping to dive in
next week (but take that with a grain of salt; I've more or less said that exact
thing to someone else for other patches for three weeks running).
next prev parent reply other threads:[~2025-11-13 22:20 UTC|newest]
Thread overview: 123+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-26 20:18 [PATCH v9 00/22] Enable FRED with KVM VMX Xin Li (Intel)
2025-10-26 20:18 ` [PATCH v9 01/22] KVM: VMX: Enable support for secondary VM exit controls Xin Li (Intel)
2025-10-26 20:18 ` [PATCH v9 02/22] KVM: VMX: Initialize VM entry/exit FRED controls in vmcs_config Xin Li (Intel)
2026-01-20 9:24 ` Binbin Wu
2026-01-22 17:57 ` Xin Li
2025-10-26 20:18 ` [PATCH v9 03/22] KVM: VMX: Disable FRED if FRED consistency checks fail Xin Li (Intel)
2026-03-05 0:25 ` Sean Christopherson
2025-10-26 20:18 ` [PATCH v9 04/22] x86/cea: Prefix event stack names with ESTACK_ Xin Li (Intel)
2025-10-26 20:18 ` [PATCH v9 05/22] x86/cea: Use array indexing to simplify exception stack access Xin Li (Intel)
2025-10-27 15:49 ` Dave Hansen
2025-10-28 2:31 ` Xin Li
2026-01-30 13:42 ` Borislav Petkov
2025-10-26 20:18 ` [PATCH v9 06/22] x86/cea: Export __this_cpu_ist_top_va() to KVM Xin Li (Intel)
2025-10-27 15:50 ` Dave Hansen
2026-01-30 13:46 ` Borislav Petkov
2026-01-30 16:35 ` Xin Li
2026-01-30 17:56 ` Borislav Petkov
2026-03-07 7:38 ` Xin Li
2026-03-09 15:24 ` Sean Christopherson
2026-03-09 22:57 ` Xin Li
2025-10-26 20:18 ` [PATCH v9 07/22] KVM: VMX: Initialize VMCS FRED fields Xin Li (Intel)
2025-11-19 2:44 ` Chao Gao
2026-01-21 6:44 ` Binbin Wu
2026-01-21 18:14 ` Xin Li
2026-01-22 0:45 ` Xin Li
2026-01-22 1:56 ` Binbin Wu
2026-01-22 17:22 ` Xin Li
2026-03-04 16:23 ` Sean Christopherson
2026-03-05 5:27 ` Xin Li
2026-03-05 15:21 ` Sean Christopherson
2026-03-05 17:25 ` Xin Li
2025-10-26 20:18 ` [PATCH v9 08/22] KVM: VMX: Set FRED MSR intercepts Xin Li (Intel)
2025-11-12 5:49 ` Chao Gao
2026-03-05 0:48 ` Sean Christopherson
2026-03-05 5:56 ` Xin Li
2026-03-06 2:30 ` Chao Gao
2026-03-06 15:54 ` Sean Christopherson
2026-01-16 19:49 ` Dave Hansen
2026-01-17 0:43 ` H. Peter Anvin
2025-10-26 20:18 ` [PATCH v9 09/22] KVM: VMX: Save/restore guest FRED RSP0 Xin Li (Intel)
2025-11-12 5:59 ` Chao Gao
2026-01-21 7:23 ` Binbin Wu
2025-10-26 20:18 ` [PATCH v9 10/22] KVM: VMX: Add support for saving and restoring FRED MSRs Xin Li (Intel)
2025-11-12 6:16 ` Chao Gao
2025-12-01 6:20 ` Xin Li
2025-10-26 20:18 ` [PATCH v9 11/22] KVM: x86: Add a helper to detect if FRED is enabled for a vCPU Xin Li (Intel)
2025-11-12 6:19 ` Chao Gao
2026-01-21 8:05 ` Binbin Wu
2026-01-21 16:46 ` Xin Li
2026-01-21 20:24 ` Sean Christopherson
2026-01-21 22:38 ` Xin Li
2025-10-26 20:19 ` [PATCH v9 12/22] KVM: VMX: Virtualize FRED event_data Xin Li (Intel)
2025-11-19 3:24 ` Chao Gao
2026-01-29 17:12 ` Xin Li
2026-01-29 17:21 ` H. Peter Anvin
2026-01-29 22:50 ` Xin Li
2026-03-04 16:42 ` Sean Christopherson
2025-10-26 20:19 ` [PATCH v9 13/22] KVM: VMX: Virtualize FRED nested exception tracking Xin Li (Intel)
2025-11-19 6:54 ` Chao Gao
2026-03-07 2:07 ` Sean Christopherson
2026-03-07 3:05 ` Xin Li
2025-10-26 20:19 ` [PATCH v9 14/22] KVM: x86: Save/restore the nested flag of an exception Xin Li (Intel)
2025-11-19 6:13 ` Chao Gao
2025-10-26 20:19 ` [PATCH v9 15/22] KVM: x86: Mark CR4.FRED as not reserved Xin Li (Intel)
2025-11-19 7:26 ` Chao Gao
2026-03-05 0:58 ` Sean Christopherson
2026-03-05 7:20 ` Xin Li
2026-03-05 15:35 ` Sean Christopherson
2026-03-05 17:09 ` Xin Li
2026-03-05 17:46 ` Xin Li
2026-03-06 5:33 ` Chao Gao
2025-10-26 20:19 ` [PATCH v9 16/22] KVM: VMX: Dump FRED context in dump_vmcs() Xin Li (Intel)
2025-11-19 7:40 ` Chao Gao
2025-11-30 18:42 ` Xin Li
2025-10-26 20:19 ` [PATCH v9 17/22] KVM: x86: Advertise support for FRED Xin Li (Intel)
2025-11-12 7:30 ` Chao Gao
2026-01-20 6:56 ` Xin Li
2026-01-20 8:07 ` Chao Gao
2026-01-20 9:09 ` Xin Li
2026-01-20 9:46 ` Binbin Wu
2026-01-20 15:25 ` Sean Christopherson
2026-01-20 18:04 ` Xin Li
2026-01-20 17:58 ` Xin Li
2025-10-26 20:19 ` [PATCH v9 18/22] KVM: nVMX: Enable support for secondary VM exit controls Xin Li (Intel)
2025-11-12 13:42 ` Chao Gao
2025-10-26 20:19 ` [PATCH v9 19/22] KVM: nVMX: Handle FRED VMCS fields in nested VMX context Xin Li (Intel)
2025-12-02 6:32 ` Chao Gao
2026-01-20 6:30 ` Xin Li
2026-01-20 16:07 ` Dave Hansen
2026-01-20 18:10 ` Xin Li
2026-01-21 0:44 ` Chao Gao
2026-01-22 16:52 ` Xin Li
2025-12-08 22:37 ` Sean Christopherson
2025-10-26 20:19 ` [PATCH v9 20/22] KVM: nVMX: Validate FRED-related VMCS fields Xin Li (Intel)
2025-11-13 3:00 ` Chao Gao
2026-01-20 9:19 ` Xin Li
2026-01-21 2:33 ` Chao Gao
2025-10-26 20:19 ` [PATCH v9 21/22] KVM: nVMX: Guard SHADOW_FIELD_R[OW] macros with VMX feature checks Xin Li (Intel)
2025-12-02 6:35 ` Chao Gao
2025-12-08 22:49 ` Sean Christopherson
2025-10-26 20:19 ` [PATCH v9 22/22] KVM: nVMX: Enable VMX FRED controls Xin Li (Intel)
2025-11-13 3:20 ` Chao Gao
2025-11-06 17:35 ` [PATCH v9 00/22] Enable FRED with KVM VMX Xin Li
2025-11-13 22:20 ` Sean Christopherson [this message]
2025-12-08 22:51 ` Sean Christopherson
2025-12-09 17:08 ` Xin Li
2026-04-23 14:35 ` David Woodhouse
2026-04-23 22:56 ` Xin Li
2026-05-05 18:04 ` Maciej Wieczor-Retman
2026-05-05 18:30 ` Andrew Cooper
2026-05-05 19:29 ` H. Peter Anvin
2026-05-05 20:20 ` Maciej Wieczor-Retman
2026-05-05 20:27 ` Andrew Cooper
2026-05-06 14:05 ` Maciej Wieczor-Retman
2026-05-07 7:49 ` David Woodhouse
2026-05-07 12:59 ` Maciej Wieczor-Retman
2026-05-07 13:35 ` David Woodhouse
2026-05-07 13:53 ` Maciej Wieczor-Retman
2026-05-07 14:01 ` David Woodhouse
2026-05-07 23:00 ` David Woodhouse
2026-05-08 14:25 ` Maciej Wieczor-Retman
2026-05-08 14:46 ` David Woodhouse
2026-05-08 18:06 ` Maciej Wieczor-Retman
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