From: Dave Hansen <dave.hansen@intel.com>
To: "Xin Li (Intel)" <xin@zytor.com>,
linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
linux-doc@vger.kernel.org
Cc: pbonzini@redhat.com, seanjc@google.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 06/22] x86/cea: Export __this_cpu_ist_top_va() to KVM
Date: Mon, 27 Oct 2025 08:50:01 -0700 [thread overview]
Message-ID: <c6a006dd-1ad4-4bd7-a21e-5ae9b1aa688f@intel.com> (raw)
In-Reply-To: <20251026201911.505204-7-xin@zytor.com>
On 10/26/25 13:18, Xin Li (Intel) wrote:
> Export __this_cpu_ist_top_va() to allow KVM to retrieve the per-CPU
> exception stack top.
>
> FRED introduced new fields in the host-state area of the VMCS for stack
> levels 1->3 (HOST_IA32_FRED_RSP[123]), each respectively corresponding to
> per-CPU exception stacks for #DB, NMI and #DF. KVM must populate these
> fields each time a vCPU is loaded onto a CPU.
Acked-by: Dave Hansen <dave.hansen@linux.intel.com>
next prev parent reply other threads:[~2025-10-27 15:50 UTC|newest]
Thread overview: 50+ 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)
2025-10-26 20:18 ` [PATCH v9 03/22] KVM: VMX: Disable FRED if FRED consistency checks fail Xin Li (Intel)
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
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 [this message]
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
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
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
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
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
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
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
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
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
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
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
2025-12-08 22:51 ` Sean Christopherson
2025-12-09 17:08 ` Xin Li
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