From: "Jürgen Groß" <jgross@suse.com>
To: Dave Hansen <dave.hansen@intel.com>,
"Reshetova, Elena" <elena.reshetova@intel.com>,
"Annapurve, Vishal" <vannapurve@google.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"bp@alien8.de" <bp@alien8.de>,
"tglx@linutronix.de" <tglx@linutronix.de>,
"peterz@infradead.org" <peterz@infradead.org>,
"mingo@redhat.com" <mingo@redhat.com>,
"hpa@zytor.com" <hpa@zytor.com>,
"thomas.lendacky@amd.com" <thomas.lendacky@amd.com>,
"x86@kernel.org" <x86@kernel.org>,
"kas@kernel.org" <kas@kernel.org>,
"Edgecombe, Rick P" <rick.p.edgecombe@intel.com>,
"dwmw@amazon.co.uk" <dwmw@amazon.co.uk>,
"Huang, Kai" <kai.huang@intel.com>,
"seanjc@google.com" <seanjc@google.com>,
"Chatre, Reinette" <reinette.chatre@intel.com>,
"Yamahata, Isaku" <isaku.yamahata@intel.com>,
"Williams, Dan J" <dan.j.williams@intel.com>,
"ashish.kalra@amd.com" <ashish.kalra@amd.com>,
"nik.borisov@suse.com" <nik.borisov@suse.com>,
"Gao, Chao" <chao.gao@intel.com>,
"sagis@google.com" <sagis@google.com>,
"Chen, Farrah" <farrah.chen@intel.com>,
Binbin Wu <binbin.wu@linux.intel.com>
Subject: Re: [PATCH 4/7] x86/kexec: Disable kexec/kdump on platforms with TDX partial write erratum
Date: Wed, 8 Oct 2025 20:13:41 +0200 [thread overview]
Message-ID: <c68c29ba-fe81-4411-b976-7867120e38ca@suse.com> (raw)
In-Reply-To: <9d86698d-525e-4d8c-b3d9-b6a0e7634649@intel.com>
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On 08.10.25 17:40, Dave Hansen wrote:
> On 10/7/25 06:31, Jürgen Groß wrote:>
>> If we can't come to an agreement that kdump should be allowed in
>> spite of a potential #MC, maybe we could disable kdump only if TDX
>> guests have been active on the machine before?
>
> How would we determine that?
>
> We can't just call the TDX module to see because it might have been
> running before but got shut down.
Ah, okay, I didn't think of that.
Then we could add a kernel boot parameter to let the user opt-in for kexec
being possible in spite of the potential #MC. I think this should cover it.
Juergen
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next prev parent reply other threads:[~2025-10-08 18:13 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-01 16:09 [PATCH v8 0/7] TDX host: kexec/kdump support Paolo Bonzini
2025-09-01 16:09 ` [PATCH 1/7] x86/kexec: Consolidate relocate_kernel() function parameters Paolo Bonzini
2025-09-01 16:09 ` [PATCH 2/7] x86/sme: Use percpu boolean to control WBINVD during kexec Paolo Bonzini
2025-09-01 16:09 ` [PATCH 3/7] x86/virt/tdx: Mark memory cache state incoherent when making SEAMCALL Paolo Bonzini
2025-09-01 16:09 ` [PATCH 4/7] x86/kexec: Disable kexec/kdump on platforms with TDX partial write erratum Paolo Bonzini
2025-09-30 1:38 ` Vishal Annapurve
2025-09-30 21:32 ` Dave Hansen
2025-10-01 2:05 ` Vishal Annapurve
2025-10-01 14:32 ` Dave Hansen
2025-10-01 17:17 ` Vishal Annapurve
2025-10-01 18:00 ` Dave Hansen
2025-10-01 21:19 ` Huang, Kai
2025-10-02 6:59 ` Reshetova, Elena
2025-10-02 7:46 ` Juergen Gross
2025-10-02 8:10 ` Reshetova, Elena
2025-10-02 15:06 ` Dave Hansen
2025-10-02 16:09 ` Vishal Annapurve
2025-10-18 15:54 ` Vishal Annapurve
2025-10-21 17:08 ` Dave Hansen
2025-10-22 2:50 ` Vishal Annapurve
2025-10-22 21:05 ` Huang, Kai
2025-10-23 16:54 ` Vishal Annapurve
2025-10-07 13:31 ` Jürgen Groß
2025-10-08 15:40 ` Dave Hansen
2025-10-08 18:13 ` Jürgen Groß [this message]
2025-10-26 23:33 ` Vishal Annapurve
2025-10-27 0:50 ` Huang, Kai
2025-10-27 16:23 ` Edgecombe, Rick P
2025-10-27 21:28 ` Huang, Kai
2025-10-28 0:07 ` Vishal Annapurve
2025-10-28 9:31 ` Huang, Kai
2025-11-03 16:44 ` Vishal Annapurve
2025-09-01 16:09 ` [PATCH 5/7] x86/virt/tdx: Remove the !KEXEC_CORE dependency Paolo Bonzini
2025-09-01 16:09 ` [PATCH 6/7] x86/virt/tdx: Update the kexec section in the TDX documentation Paolo Bonzini
2025-09-01 16:09 ` [PATCH 7/7] KVM: TDX: Explicitly do WBINVD when no more TDX SEAMCALLs Paolo Bonzini
2025-10-03 13:09 ` [PATCH v8 0/7] TDX host: kexec/kdump support Paolo Bonzini
2025-10-03 13:54 ` David Woodhouse
2025-10-03 14:05 ` Dave Hansen
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