From: "Edgecombe, Rick P" <rick.p.edgecombe@intel.com>
To: "seanjc@google.com" <seanjc@google.com>
Cc: "Yang, Weijiang" <weijiang.yang@intel.com>,
"isaku.yamahata@gmail.com" <isaku.yamahata@gmail.com>,
"Huang, Kai" <kai.huang@intel.com>,
"sagis@google.com" <sagis@google.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"Aktas, Erdem" <erdemaktas@google.com>,
"Zhao, Yan Y" <yan.y.zhao@intel.com>,
"pbonzini@redhat.com" <pbonzini@redhat.com>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"dmatlack@google.com" <dmatlack@google.com>
Subject: Re: [PATCH 02/16] KVM: x86/mmu: Introduce a slot flag to zap only slot leafs on slot deletion
Date: Thu, 16 May 2024 02:21:40 +0000 [thread overview]
Message-ID: <a69d1a1bca645fbcc450e2ded425cc3ab8f3d145.camel@intel.com> (raw)
In-Reply-To: <ec40aed73b79f0099ec14293f2d87d0f72e7d67b.camel@intel.com>
On Wed, 2024-05-15 at 16:56 -0700, Rick Edgecombe wrote:
>
> If we think it is not a security issue, and we don't even know if it can be
> hit
> for TDX, then I'd be included to go with (a). Especially since we are just
> aiming for the most basic support, and don't have to worry about regressions
> in
> the classical sense.
>
> I'm not sure how easy it will be to root cause it at this point. Hopefully Yan
> will be coming online soon. She mentioned some previous Intel effort to
> investigate it. Presumably we would have to start with the old kernel that
> exhibited the issue. If it can still be found...
>
Weijiang filled me in. It sounds like a really tough one, as he described: "From
my experience, to reproduce the issue, it requires specific HW config + specific
SW + specific operations, I almost died on it"
If it shows up in TDX, we might get lucky with an easier reproducer...
next prev parent reply other threads:[~2024-05-16 2:21 UTC|newest]
Thread overview: 152+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-15 0:59 [PATCH 00/16] TDX MMU prep series part 1 Rick Edgecombe
2024-05-15 0:59 ` [PATCH 01/16] KVM: x86: Add a VM type define for TDX Rick Edgecombe
2024-05-15 0:59 ` [PATCH 02/16] KVM: x86/mmu: Introduce a slot flag to zap only slot leafs on slot deletion Rick Edgecombe
2024-05-15 13:24 ` Huang, Kai
2024-05-15 19:09 ` Sean Christopherson
2024-05-15 19:23 ` Edgecombe, Rick P
2024-05-15 20:05 ` Sean Christopherson
2024-05-15 20:53 ` Edgecombe, Rick P
2024-05-15 22:47 ` Sean Christopherson
2024-05-15 23:06 ` Huang, Kai
2024-05-15 23:20 ` Sean Christopherson
2024-05-15 23:36 ` Huang, Kai
2024-05-16 1:12 ` Xiaoyao Li
2024-05-17 15:30 ` Paolo Bonzini
2024-05-22 1:29 ` Yan Zhao
2024-05-22 2:31 ` Sean Christopherson
2024-05-22 6:48 ` Yan Zhao
2024-05-22 15:45 ` Paolo Bonzini
2024-05-24 1:50 ` Yan Zhao
2024-05-15 23:56 ` Edgecombe, Rick P
2024-05-16 2:21 ` Edgecombe, Rick P [this message]
2024-05-16 3:56 ` Yan Zhao
2024-05-17 15:27 ` Paolo Bonzini
2024-05-17 15:25 ` Paolo Bonzini
2024-05-15 18:03 ` Isaku Yamahata
2024-05-15 0:59 ` [PATCH 03/16] KVM: x86/tdp_mmu: Add a helper function to walk down the TDP MMU Rick Edgecombe
2024-05-17 7:44 ` Chao Gao
2024-05-17 9:08 ` Isaku Yamahata
2024-05-15 0:59 ` [PATCH 04/16] KVM: x86/mmu: Add address conversion functions for TDX shared bit of GPA Rick Edgecombe
2024-05-15 22:34 ` Huang, Kai
2024-05-15 23:21 ` Edgecombe, Rick P
2024-05-15 23:31 ` Huang, Kai
2024-05-15 23:38 ` Edgecombe, Rick P
2024-05-15 23:44 ` Huang, Kai
2024-05-15 23:59 ` Edgecombe, Rick P
2024-05-16 0:12 ` Huang, Kai
2024-05-16 0:19 ` Edgecombe, Rick P
2024-05-16 0:25 ` Huang, Kai
2024-05-16 0:35 ` Edgecombe, Rick P
2024-05-16 1:04 ` Huang, Kai
2024-05-16 1:20 ` Edgecombe, Rick P
2024-05-16 1:40 ` Huang, Kai
2024-05-16 5:52 ` Yan Zhao
2024-05-18 0:25 ` Edgecombe, Rick P
2024-05-16 23:08 ` Edgecombe, Rick P
2024-05-17 0:37 ` Huang, Kai
2024-05-17 1:51 ` Edgecombe, Rick P
2024-05-17 4:26 ` Huang, Kai
2024-05-17 21:12 ` Edgecombe, Rick P
2024-05-15 0:59 ` [PATCH 05/16] KVM: Add member to struct kvm_gfn_range for target alias Rick Edgecombe
2024-05-17 20:58 ` Edgecombe, Rick P
2024-05-15 0:59 ` [PATCH 06/16] KVM: x86/mmu: Add a new is_private member for union kvm_mmu_page_role Rick Edgecombe
2024-05-15 0:59 ` [PATCH 07/16] KVM: x86/mmu: Add a private pointer to struct kvm_mmu_page Rick Edgecombe
2024-05-15 0:59 ` [PATCH 08/16] KVM: x86/mmu: Bug the VM if kvm_zap_gfn_range() is called for TDX Rick Edgecombe
2024-05-15 13:27 ` Huang, Kai
2024-05-15 15:22 ` Edgecombe, Rick P
2024-05-15 23:14 ` Huang, Kai
2024-05-15 15:34 ` Sean Christopherson
2024-05-15 15:49 ` Edgecombe, Rick P
2024-05-15 15:56 ` Edgecombe, Rick P
2024-05-15 16:02 ` Sean Christopherson
2024-05-15 16:12 ` Edgecombe, Rick P
2024-05-15 18:09 ` Sean Christopherson
2024-05-15 18:22 ` Edgecombe, Rick P
2024-05-15 19:48 ` Sean Christopherson
2024-05-15 20:32 ` Edgecombe, Rick P
2024-05-15 23:26 ` Sean Christopherson
2024-05-15 16:22 ` Isaku Yamahata
2024-05-15 22:17 ` Huang, Kai
2024-05-15 23:14 ` Edgecombe, Rick P
2024-05-15 23:38 ` Huang, Kai
2024-05-16 0:13 ` Edgecombe, Rick P
2024-05-16 0:27 ` Isaku Yamahata
2024-05-16 1:11 ` Huang, Kai
2024-05-16 0:15 ` Isaku Yamahata
2024-05-16 0:52 ` Edgecombe, Rick P
2024-05-16 1:21 ` Huang, Kai
2024-05-16 17:27 ` Isaku Yamahata
2024-05-16 21:46 ` Edgecombe, Rick P
2024-05-16 22:23 ` Huang, Kai
2024-05-16 22:38 ` Edgecombe, Rick P
2024-05-16 23:16 ` Huang, Kai
2024-05-15 0:59 ` [PATCH 09/16] KVM: x86/mmu: Make kvm_tdp_mmu_alloc_root() return void Rick Edgecombe
2024-05-15 0:59 ` [PATCH 10/16] KVM: x86/tdp_mmu: Support TDX private mapping for TDP MMU Rick Edgecombe
2024-05-15 17:35 ` Isaku Yamahata
2024-05-15 18:00 ` Edgecombe, Rick P
2024-05-16 0:52 ` Huang, Kai
2024-05-16 1:27 ` Edgecombe, Rick P
2024-05-16 2:07 ` Huang, Kai
2024-05-16 2:57 ` Edgecombe, Rick P
2024-05-16 13:04 ` Huang, Kai
2024-05-16 16:36 ` Edgecombe, Rick P
2024-05-16 19:42 ` Isaku Yamahata
2024-05-17 2:35 ` Edgecombe, Rick P
2024-05-17 9:03 ` Isaku Yamahata
2024-05-17 18:16 ` Edgecombe, Rick P
2024-05-17 19:16 ` Isaku Yamahata
2024-05-20 23:32 ` Isaku Yamahata
2024-05-21 15:07 ` Edgecombe, Rick P
2024-05-21 16:15 ` Isaku Yamahata
2024-05-22 22:34 ` Isaku Yamahata
2024-05-22 23:09 ` Edgecombe, Rick P
2024-05-22 23:47 ` Isaku Yamahata
2024-05-22 23:50 ` Edgecombe, Rick P
2024-05-23 0:01 ` Isaku Yamahata
2024-05-23 18:27 ` Edgecombe, Rick P
2024-05-24 7:55 ` Isaku Yamahata
2024-05-28 16:27 ` Edgecombe, Rick P
2024-05-28 17:47 ` Paolo Bonzini
2024-05-29 2:13 ` Edgecombe, Rick P
2024-05-29 7:25 ` Paolo Bonzini
2024-05-31 14:11 ` Isaku Yamahata
2024-05-28 17:43 ` Paolo Bonzini
2024-05-28 17:16 ` Paolo Bonzini
2024-05-28 18:29 ` Edgecombe, Rick P
2024-05-29 1:06 ` Isaku Yamahata
2024-05-29 1:51 ` Edgecombe, Rick P
2024-05-17 2:36 ` Huang, Kai
2024-05-17 8:14 ` Isaku Yamahata
2024-05-18 5:42 ` Huang, Kai
2024-05-18 15:41 ` Edgecombe, Rick P
2024-05-20 10:38 ` Huang, Kai
2024-05-20 18:58 ` Isaku Yamahata
2024-05-20 19:02 ` Edgecombe, Rick P
2024-05-20 23:39 ` Edgecombe, Rick P
2024-05-21 2:25 ` Isaku Yamahata
2024-05-21 2:57 ` Edgecombe, Rick P
2024-05-20 22:34 ` Huang, Kai
2024-05-16 1:48 ` Isaku Yamahata
2024-05-16 2:00 ` Edgecombe, Rick P
2024-05-16 2:10 ` Huang, Kai
2024-05-28 16:59 ` Paolo Bonzini
2024-05-16 17:10 ` Isaku Yamahata
2024-05-23 23:14 ` Edgecombe, Rick P
2024-05-24 8:20 ` Isaku Yamahata
2024-05-28 21:48 ` Edgecombe, Rick P
2024-05-29 1:16 ` Isaku Yamahata
2024-05-29 1:50 ` Edgecombe, Rick P
2024-05-29 2:20 ` Isaku Yamahata
2024-05-29 2:29 ` Edgecombe, Rick P
2024-05-28 20:54 ` Edgecombe, Rick P
2024-05-29 1:24 ` Isaku Yamahata
2024-05-28 23:06 ` Edgecombe, Rick P
2024-05-29 1:57 ` Isaku Yamahata
2024-05-29 2:13 ` Edgecombe, Rick P
2024-05-29 16:55 ` Isaku Yamahata
2024-05-15 0:59 ` [PATCH 11/16] KVM: x86/tdp_mmu: Extract root invalid check from tdx_mmu_next_root() Rick Edgecombe
2024-05-15 0:59 ` [PATCH 12/16] KVM: x86/tdp_mmu: Introduce KVM MMU root types to specify page table type Rick Edgecombe
2024-05-15 0:59 ` [PATCH 13/16] KVM: x86/tdp_mmu: Introduce shared, private KVM MMU root types Rick Edgecombe
2024-05-15 0:59 ` [PATCH 14/16] KVM: x86/tdp_mmu: Take root types for kvm_tdp_mmu_invalidate_all_roots() Rick Edgecombe
2024-05-15 0:59 ` [PATCH 15/16] KVM: x86/tdp_mmu: Make mmu notifier callbacks to check kvm_process Rick Edgecombe
2024-05-15 0:59 ` [PATCH 16/16] KVM: x86/tdp_mmu: Invalidate correct roots Rick Edgecombe
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