From: "Huang, Kai" <kai.huang@intel.com>
To: "Zhao, Yan Y" <yan.y.zhao@intel.com>
Cc: "Du, Fan" <fan.du@intel.com>,
"Li, Xiaoyao" <xiaoyao.li@intel.com>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"Hansen, Dave" <dave.hansen@intel.com>,
"david@redhat.com" <david@redhat.com>,
"thomas.lendacky@amd.com" <thomas.lendacky@amd.com>,
"tabba@google.com" <tabba@google.com>,
"vbabka@suse.cz" <vbabka@suse.cz>,
"michael.roth@amd.com" <michael.roth@amd.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"seanjc@google.com" <seanjc@google.com>,
"pbonzini@redhat.com" <pbonzini@redhat.com>,
"binbin.wu@linux.intel.com" <binbin.wu@linux.intel.com>,
"ackerleytng@google.com" <ackerleytng@google.com>,
"kas@kernel.org" <kas@kernel.org>,
"Weiny, Ira" <ira.weiny@intel.com>,
"Peng, Chao P" <chao.p.peng@intel.com>,
"Yamahata, Isaku" <isaku.yamahata@intel.com>,
"Annapurve, Vishal" <vannapurve@google.com>,
"Edgecombe, Rick P" <rick.p.edgecombe@intel.com>,
"Miao, Jun" <jun.miao@intel.com>,
"x86@kernel.org" <x86@kernel.org>,
"pgonda@google.com" <pgonda@google.com>
Subject: Re: [RFC PATCH v2 14/23] KVM: TDX: Split and inhibit huge mappings if a VMExit carries level info
Date: Tue, 18 Nov 2025 01:04:20 +0000 [thread overview]
Message-ID: <6635e53388c7d2f1bde4da7648a9cffa2bda8caf.camel@intel.com> (raw)
In-Reply-To: <aRbYxOIWosU7RF1K@yzhao56-desk.sh.intel.com>
On Fri, 2025-11-14 at 15:22 +0800, Yan Zhao wrote:
> > Will 'level == PG_LEVEL_4K' in this case? Or will this function return
> > early right after check the eeq_type?
> The function will return early right after check the eeq_type.
But for such case the fault handler will still return 2M and KVM will AUG 2M
page? Then if guest accepts 4K page, a new exit to KVM would happen?
But this time KVM is able to find the info that guest is accepting 4K and KVM
will split the 2M to 4K pages so we are good to go?
next prev parent reply other threads:[~2025-11-18 1:04 UTC|newest]
Thread overview: 129+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-07 9:39 [RFC PATCH v2 00/23] KVM: TDX huge page support for private memory Yan Zhao
2025-08-07 9:41 ` [RFC PATCH v2 01/23] x86/tdx: Enhance tdh_mem_page_aug() to support huge pages Yan Zhao
2025-08-07 9:41 ` [RFC PATCH v2 02/23] x86/virt/tdx: Add SEAMCALL wrapper tdh_mem_page_demote() Yan Zhao
2025-09-01 8:55 ` Binbin Wu
2025-09-01 9:08 ` Yan Zhao
2025-09-02 16:56 ` Edgecombe, Rick P
2025-09-02 17:37 ` Sean Christopherson
2025-09-02 17:45 ` Edgecombe, Rick P
2025-09-04 9:31 ` Yan Zhao
2025-11-11 9:15 ` Huang, Kai
2025-11-12 8:06 ` Yan Zhao
2025-11-14 9:14 ` Binbin Wu
2025-11-14 9:21 ` Yan Zhao
2025-08-07 9:42 ` [RFC PATCH v2 03/23] x86/tdx: Enhance tdh_phymem_page_wbinvd_hkid() to invalidate huge pages Yan Zhao
2025-11-11 9:23 ` Huang, Kai
2025-11-12 8:43 ` Yan Zhao
2025-11-12 10:29 ` Huang, Kai
2025-11-13 2:35 ` Yan Zhao
2025-11-13 7:37 ` Huang, Kai
2025-11-13 9:03 ` Yan Zhao
2025-11-13 15:26 ` Dave Hansen
2025-11-14 1:21 ` Yan Zhao
2025-12-10 1:14 ` Vishal Annapurve
2025-12-10 1:18 ` Yan Zhao
2025-12-10 1:30 ` Vishal Annapurve
2025-12-10 1:55 ` Yan Zhao
2025-12-31 19:37 ` Vishal Annapurve
2026-01-06 10:37 ` Yan Zhao
2025-08-07 9:42 ` [RFC PATCH v2 04/23] KVM: TDX: Introduce tdx_clear_folio() to clear " Yan Zhao
2025-09-02 2:56 ` Binbin Wu
2025-09-03 9:51 ` Yan Zhao
2025-09-03 11:19 ` Binbin Wu
2025-09-04 2:53 ` Yan Zhao
2025-08-07 9:42 ` [RFC PATCH v2 05/23] x86/tdx: Enhance tdh_phymem_page_reclaim() to support " Yan Zhao
2025-11-17 2:09 ` Binbin Wu
2025-11-17 4:05 ` Yan Zhao
2025-08-07 9:42 ` [RFC PATCH v2 06/23] KVM: TDX: Do not hold page refcount on private guest pages Yan Zhao
2025-08-07 9:42 ` [RFC PATCH v2 07/23] KVM: x86/mmu: Disallow page merging (huge page adjustment) for mirror root Yan Zhao
2025-08-07 9:43 ` [RFC PATCH v2 08/23] KVM: x86/tdp_mmu: Alloc external_spt page for mirror page table splitting Yan Zhao
2025-11-11 9:52 ` Huang, Kai
2025-11-12 9:29 ` Yan Zhao
2025-08-07 9:43 ` [RFC PATCH v2 09/23] KVM: x86/tdp_mmu: Add split_external_spt hook called during write mmu_lock Yan Zhao
2025-11-11 10:06 ` Huang, Kai
2025-11-13 3:16 ` Yan Zhao
2025-11-17 8:53 ` Binbin Wu
2025-11-17 9:09 ` Yan Zhao
2025-08-07 9:43 ` [RFC PATCH v2 10/23] KVM: TDX: Enable huge page splitting under write kvm->mmu_lock Yan Zhao
2025-11-11 10:20 ` Huang, Kai
2025-11-13 5:53 ` Yan Zhao
2025-11-17 9:17 ` Binbin Wu
2025-11-17 9:26 ` Yan Zhao
2025-12-09 23:49 ` Sagi Shahar
2025-12-09 23:54 ` Edgecombe, Rick P
2025-12-10 0:28 ` Sagi Shahar
2025-12-10 0:50 ` Yan Zhao
2025-12-10 17:16 ` Sagi Shahar
2025-12-10 19:49 ` Edgecombe, Rick P
2025-12-11 2:10 ` Yan Zhao
2025-08-07 9:43 ` [RFC PATCH v2 11/23] KVM: x86: Reject splitting huge pages under shared mmu_lock for mirror root Yan Zhao
2025-09-03 3:30 ` Binbin Wu
2025-08-07 9:43 ` [RFC PATCH v2 12/23] KVM: x86/mmu: Introduce kvm_split_cross_boundary_leafs() Yan Zhao
2025-09-03 6:57 ` Binbin Wu
2025-09-03 9:44 ` Yan Zhao
2025-11-11 10:42 ` Huang, Kai
2025-11-13 8:54 ` Yan Zhao
2025-11-13 11:02 ` Huang, Kai
2025-11-13 11:40 ` Huang, Kai
2025-11-14 6:09 ` Yan Zhao
2025-11-18 0:14 ` Huang, Kai
2025-11-18 6:30 ` Yan Zhao
2025-11-18 8:59 ` Binbin Wu
2025-11-18 10:49 ` Huang, Kai
2025-11-19 3:41 ` Yan Zhao
2026-01-06 10:35 ` Yan Zhao
2025-11-19 6:23 ` Yan Zhao
2025-11-19 6:31 ` Yan Zhao
2025-08-07 9:44 ` [RFC PATCH v2 13/23] KVM: x86: Introduce hugepage_set_guest_inhibit() Yan Zhao
2025-08-07 9:44 ` [RFC PATCH v2 14/23] KVM: TDX: Split and inhibit huge mappings if a VMExit carries level info Yan Zhao
2025-09-03 7:36 ` Binbin Wu
2025-09-03 9:37 ` Yan Zhao
2025-11-11 10:55 ` Huang, Kai
2025-11-14 1:42 ` Yan Zhao
2025-11-18 0:26 ` Huang, Kai
2025-11-18 2:44 ` Yan Zhao
2025-11-11 11:05 ` Huang, Kai
2025-11-14 7:22 ` Yan Zhao
2025-11-18 1:04 ` Huang, Kai [this message]
2025-11-18 2:20 ` Yan Zhao
2025-11-18 9:44 ` Huang, Kai
2025-11-19 2:58 ` Yan Zhao
2025-11-19 5:51 ` Binbin Wu
2025-11-19 6:29 ` Yan Zhao
2025-11-19 6:39 ` Binbin Wu
2025-08-07 9:44 ` [RFC PATCH v2 15/23] KVM: Change the return type of gfn_handler_t() from bool to int Yan Zhao
2025-08-07 9:44 ` [RFC PATCH v2 16/23] KVM: x86: Split cross-boundary mirror leafs for KVM_SET_MEMORY_ATTRIBUTES Yan Zhao
2025-08-07 9:45 ` [RFC PATCH v2 17/23] KVM: guest_memfd: Split for punch hole and private-to-shared conversion Yan Zhao
2025-09-04 7:58 ` Binbin Wu
2025-09-04 9:48 ` Yan Zhao
2025-09-04 11:07 ` Yan Zhao
2025-10-01 6:21 ` Ackerley Tng
2025-10-13 0:18 ` Yan Zhao
2025-10-01 8:00 ` Ackerley Tng
2025-10-13 0:45 ` Yan Zhao
2025-08-07 9:45 ` [RFC PATCH v2 18/23] x86/virt/tdx: Do not perform cache flushes unless CLFLUSH_BEFORE_ALLOC is set Yan Zhao
2025-08-11 21:10 ` Sagi Shahar
2025-08-12 6:37 ` Yan Zhao
2025-09-04 8:16 ` Binbin Wu
2025-09-04 9:50 ` Yan Zhao
2025-09-05 9:05 ` Binbin Wu
2025-09-05 15:41 ` Edgecombe, Rick P
2025-09-15 6:05 ` Yan Zhao
2025-08-07 9:45 ` [RFC PATCH v2 19/23] KVM: TDX: Pass down pfn to split_external_spt() Yan Zhao
2025-09-04 8:30 ` Binbin Wu
2025-08-07 9:45 ` [RFC PATCH v2 20/23] KVM: TDX: Handle Dynamic PAMT in tdh_mem_page_demote() Yan Zhao
2025-08-07 9:46 ` [RFC PATCH v2 21/23] KVM: TDX: Preallocate PAMT pages to be used in split path Yan Zhao
2025-09-04 9:17 ` Binbin Wu
2025-09-04 9:58 ` Yan Zhao
2025-12-05 6:14 ` Sagi Shahar
2025-12-08 5:49 ` Yan Zhao
2025-12-11 1:42 ` Vishal Annapurve
2025-12-11 2:36 ` Yan Zhao
2025-08-07 9:46 ` [RFC PATCH v2 22/23] KVM: TDX: Handle Dynamic PAMT on page split Yan Zhao
2025-08-14 5:31 ` Vishal Annapurve
2025-08-14 18:29 ` Vishal Annapurve
2025-08-18 4:19 ` Yan Zhao
2025-08-07 9:46 ` [RFC PATCH v2 23/23] KVM: TDX: Turn on PG_LEVEL_2M after TD is RUNNABLE Yan Zhao
2025-11-11 11:25 ` Huang, Kai
2025-11-14 8:34 ` Yan Zhao
2025-11-18 0:56 ` Huang, Kai
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