From: "Edgecombe, Rick P" <rick.p.edgecombe@intel.com>
To: "seanjc@google.com" <seanjc@google.com>,
"Zhao, Yan Y" <yan.y.zhao@intel.com>
Cc: "kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"pbonzini@redhat.com" <pbonzini@redhat.com>,
"Annapurve, Vishal" <vannapurve@google.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"michael.roth@amd.com" <michael.roth@amd.com>,
"Weiny, Ira" <ira.weiny@intel.com>
Subject: Re: [RFC PATCH 02/12] KVM: x86/mmu: Add dedicated API to map guest_memfd pfn into TDP MMU
Date: Thu, 28 Aug 2025 01:26:50 +0000 [thread overview]
Message-ID: <6bb76ce318651fcae796be57b77e10857eb73879.camel@intel.com> (raw)
In-Reply-To: <4c292519bf58d503c561063d4c139ab918ed3304.camel@intel.com>
On Wed, 2025-08-27 at 17:54 -0700, Rick Edgecombe wrote:
> >
> > Then, what about setting
> > .max_level = PG_LEVEL_4K,
> > directly?
> >
> > Otherwise, the "(KVM_BUG_ON(level != PG_LEVEL_4K, kvm)" would be triggered
> > in
> > tdx_sept_set_private_spte().
>
> Yes this fails to boot a TD. With max_level = PG_LEVEL_4K it passes the full
> tests. I don't think it's ideal to encode PAGE.ADD details here though.
>
> But I'm not immediately clear what is going wrong. The old struct
> kvm_page_fault
> looks pretty similar. Did you root cause it?
Oh, duh. Because we are passing in the PFN now so it can't know the size. So
it's not about PAGE.ADD actually.
Sill, how about calling the function kvm_tdp_mmu_map_private_pfn_4k(), or
passing in the level?
next prev parent reply other threads:[~2025-08-28 1:27 UTC|newest]
Thread overview: 85+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-27 0:05 [RFC PATCH 00/12] KVM: x86/mmu: TDX post-populate cleanups Sean Christopherson
2025-08-27 0:05 ` [RFC PATCH 01/12] KVM: TDX: Drop PROVE_MMU=y sanity check on to-be-populated mappings Sean Christopherson
2025-08-27 8:14 ` Yan Zhao
2025-08-28 0:37 ` Ira Weiny
2025-08-28 2:13 ` Huang, Kai
2025-08-27 0:05 ` [RFC PATCH 02/12] KVM: x86/mmu: Add dedicated API to map guest_memfd pfn into TDP MMU Sean Christopherson
2025-08-27 8:25 ` Yan Zhao
2025-08-28 0:54 ` Edgecombe, Rick P
2025-08-28 1:26 ` Edgecombe, Rick P [this message]
2025-08-28 6:23 ` Yan Zhao
2025-08-28 19:40 ` Sean Christopherson
2025-08-29 1:16 ` Yan Zhao
2025-09-01 0:39 ` Yan Zhao
2025-08-28 6:55 ` Yan Zhao
2025-08-28 0:40 ` Ira Weiny
2025-08-28 1:51 ` Edgecombe, Rick P
2025-08-28 19:57 ` Sean Christopherson
2025-08-27 0:05 ` [RFC PATCH 03/12] Revert "KVM: x86/tdp_mmu: Add a helper function to walk down the TDP MMU" Sean Christopherson
2025-08-27 0:05 ` [RFC PATCH 04/12] KVM: x86/mmu: Rename kvm_tdp_map_page() to kvm_tdp_prefault_page() Sean Christopherson
2025-08-28 2:01 ` Edgecombe, Rick P
2025-08-28 18:50 ` Sean Christopherson
2025-08-28 19:04 ` Edgecombe, Rick P
2025-08-27 0:05 ` [RFC PATCH 05/12] KVM: TDX: Drop superfluous page pinning in S-EPT management Sean Christopherson
2025-08-27 8:33 ` Yan Zhao
2025-08-28 2:05 ` Edgecombe, Rick P
2025-08-28 20:16 ` Sean Christopherson
2025-08-28 0:36 ` Ira Weiny
2025-08-28 7:08 ` Yan Zhao
2025-08-28 15:54 ` Ira Weiny
2025-08-28 2:45 ` Huang, Kai
2025-08-27 0:05 ` [RFC PATCH 06/12] KVM: TDX: Return -EIO, not -EINVAL, on a KVM_BUG_ON() condition Sean Christopherson
2025-08-27 8:39 ` Yan Zhao
2025-08-27 17:26 ` Sean Christopherson
2025-08-28 2:11 ` Edgecombe, Rick P
2025-08-28 19:21 ` Sean Christopherson
2025-08-28 20:13 ` Edgecombe, Rick P
2025-08-28 21:00 ` Sean Christopherson
2025-08-28 21:19 ` Edgecombe, Rick P
2025-08-28 21:34 ` Sean Christopherson
2025-08-28 15:03 ` Ira Weiny
2025-08-27 0:05 ` [RFC PATCH 07/12] KVM: TDX: Avoid a double-KVM_BUG_ON() in tdx_sept_zap_private_spte() Sean Christopherson
2025-08-28 2:19 ` Edgecombe, Rick P
2025-08-28 14:50 ` Edgecombe, Rick P
2025-08-29 1:10 ` Yan Zhao
2025-08-28 15:02 ` Ira Weiny
2025-08-27 0:05 ` [RFC PATCH 08/12] KVM: TDX: Use atomic64_dec_return() instead of a poor equivalent Sean Christopherson
2025-08-28 2:56 ` Edgecombe, Rick P
2025-08-28 6:48 ` Yan Zhao
2025-08-28 19:14 ` Edgecombe, Rick P
2025-08-28 22:33 ` Sean Christopherson
2025-08-28 23:18 ` Edgecombe, Rick P
2025-08-28 15:03 ` Ira Weiny
2025-08-27 0:05 ` [RFC PATCH 09/12] KVM: TDX: Fold tdx_mem_page_record_premap_cnt() into its sole caller Sean Christopherson
2025-08-27 9:02 ` Yan Zhao
2025-08-27 19:08 ` Sean Christopherson
2025-08-28 3:13 ` Edgecombe, Rick P
2025-08-28 5:56 ` Yan Zhao
2025-08-28 19:08 ` Edgecombe, Rick P
2025-08-28 5:43 ` Yan Zhao
2025-08-28 17:00 ` Sean Christopherson
2025-08-28 18:52 ` Edgecombe, Rick P
2025-08-28 20:26 ` Sean Christopherson
2025-08-28 21:33 ` Edgecombe, Rick P
2025-08-28 21:57 ` Sean Christopherson
2025-08-28 23:17 ` Edgecombe, Rick P
2025-08-29 6:08 ` Yan Zhao
2025-08-28 22:06 ` Ira Weiny
2025-08-28 23:17 ` Sean Christopherson
2025-08-29 0:35 ` Ira Weiny
2025-08-29 6:06 ` Yan Zhao
2025-08-28 21:44 ` Sean Christopherson
2025-08-29 2:42 ` Binbin Wu
2025-08-29 2:31 ` Yan Zhao
2025-08-29 6:33 ` Yan Zhao
2025-08-28 15:30 ` Ira Weiny
2025-08-28 15:28 ` Ira Weiny
2025-08-27 0:05 ` [RFC PATCH 10/12] KVM: TDX: Assert that slots_lock is held when nr_premapped is accessed Sean Christopherson
2025-08-27 0:05 ` [RFC PATCH 11/12] KVM: TDX: Track nr_premapped as an "unsigned long", not an "atomic64_t" Sean Christopherson
2025-08-27 9:12 ` Yan Zhao
2025-08-27 0:05 ` [RFC PATCH 12/12] KVM: TDX: Rename nr_premapped to nr_pending_tdh_mem_page_adds Sean Christopherson
2025-08-27 9:22 ` Yan Zhao
2025-08-28 15:23 ` Ira Weiny
2025-08-27 9:48 ` [RFC PATCH 00/12] KVM: x86/mmu: TDX post-populate cleanups Yan Zhao
2025-08-28 19:01 ` Edgecombe, Rick P
2025-08-28 23:19 ` Sean Christopherson
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=6bb76ce318651fcae796be57b77e10857eb73879.camel@intel.com \
--to=rick.p.edgecombe@intel.com \
--cc=ira.weiny@intel.com \
--cc=kvm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=michael.roth@amd.com \
--cc=pbonzini@redhat.com \
--cc=seanjc@google.com \
--cc=vannapurve@google.com \
--cc=yan.y.zhao@intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®