From: "Edgecombe, Rick P" <rick.p.edgecombe@intel.com>
To: "binbin.wu@linux.intel.com" <binbin.wu@linux.intel.com>
Cc: "kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"linux-coco@lists.linux.dev" <linux-coco@lists.linux.dev>,
"Huang, Kai" <kai.huang@intel.com>,
"Hansen, Dave" <dave.hansen@intel.com>,
"Zhao, Yan Y" <yan.y.zhao@intel.com>,
"kirill.shutemov@linux.intel.com"
<kirill.shutemov@linux.intel.com>,
"kas@kernel.org" <kas@kernel.org>,
"seanjc@google.com" <seanjc@google.com>,
"mingo@redhat.com" <mingo@redhat.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"pbonzini@redhat.com" <pbonzini@redhat.com>,
"nik.borisov@suse.com" <nik.borisov@suse.com>,
"linux-doc@vger.kernel.org" <linux-doc@vger.kernel.org>,
"hpa@zytor.com" <hpa@zytor.com>,
"tglx@kernel.org" <tglx@kernel.org>,
"Annapurve, Vishal" <vannapurve@google.com>,
"bp@alien8.de" <bp@alien8.de>, "Gao, Chao" <chao.gao@intel.com>,
"x86@kernel.org" <x86@kernel.org>
Subject: Re: [PATCH v6 09/11] KVM: TDX: Get/put PAMT pages when (un)mapping private memory
Date: Mon, 6 Jul 2026 20:47:18 +0000 [thread overview]
Message-ID: <2bdcc07d98df66954b9508be537b6f6a7c9f88de.camel@intel.com> (raw)
In-Reply-To: <0c31fcdc-048c-4ff2-9e89-1ba112815c84@linux.intel.com>
On Fri, 2026-07-03 at 11:15 +0800, Binbin Wu wrote:
> > @@ -1669,16 +1683,29 @@ static struct page *tdx_spte_to_sept_pt(struct kvm
> > *kvm, gfn_t gfn,
> > static int tdx_sept_map_nonleaf_spte(struct kvm *kvm, gfn_t gfn,
> > enum pg_level level, u64 new_spte)
> > {
> > + struct kvm_vcpu *vcpu = kvm_get_running_vcpu();
> > + struct vcpu_tdx *tdx = to_tdx(vcpu);
>
> Nit:
> Is it better to move this after checking vcpu is not NULL?
> Although tdx is not dereferenced in between, if vcpu is NULL,
> it means container_of() does arithmetic to a NULL pointer.
Personally I'm on the fence. I'm going to leave it, because Sean did it that
way:
https://lore.kernel.org/kvm/20260129011517.3545883-23-seanjc@google.com/
next prev parent reply other threads:[~2026-07-06 20:47 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-26 2:35 [PATCH v6 00/11] Dynamic PAMT Rick Edgecombe
2026-05-26 2:35 ` [PATCH v6 01/11] x86/virt/tdx: Simplify tdmr_get_pamt_sz() Rick Edgecombe
2026-06-04 16:05 ` Kiryl Shutsemau
2026-07-01 0:08 ` Edgecombe, Rick P
2026-06-11 18:25 ` Vishal Annapurve
2026-07-03 5:48 ` Chao Gao
2026-07-06 20:18 ` Edgecombe, Rick P
2026-05-26 2:35 ` [PATCH v6 02/11] x86/virt/tdx: Allocate page bitmap for Dynamic PAMT Rick Edgecombe
2026-06-04 16:14 ` Kiryl Shutsemau
2026-07-01 0:14 ` Edgecombe, Rick P
2026-06-11 18:47 ` Vishal Annapurve
2026-07-03 8:26 ` Chao Gao
2026-05-26 2:35 ` [PATCH v6 03/11] x86/virt/tdx: Add tdx_alloc/free_control_page() helpers Rick Edgecombe
2026-06-08 2:11 ` Binbin Wu
2026-06-08 2:18 ` Yan Zhao
2026-07-01 0:15 ` Edgecombe, Rick P
2026-07-06 12:31 ` Chao Gao
2026-07-06 20:23 ` Edgecombe, Rick P
2026-05-26 2:35 ` [PATCH v6 04/11] x86/virt/tdx: Allocate ref counts for Dynamic PAMT memory Rick Edgecombe
2026-07-02 7:20 ` Binbin Wu
2026-07-06 20:26 ` Edgecombe, Rick P
2026-07-06 13:22 ` Chao Gao
2026-07-06 20:26 ` Edgecombe, Rick P
2026-05-26 2:35 ` [PATCH v6 05/11] x86/virt/tdx: Handle concurrent callers in tdx_pamt_get/put() Rick Edgecombe
2026-07-02 7:39 ` Binbin Wu
2026-07-06 20:27 ` Edgecombe, Rick P
2026-05-26 2:35 ` [PATCH v6 06/11] x86/virt/tdx: Optimize tdx_pamt_get/put() Rick Edgecombe
2026-05-26 8:57 ` Chao Gao
2026-05-26 16:42 ` Edgecombe, Rick P
2026-06-04 16:59 ` Kiryl Shutsemau
2026-06-05 5:40 ` Chao Gao
2026-06-05 11:42 ` Kiryl Shutsemau
2026-06-05 16:23 ` Dave Hansen
2026-06-08 9:14 ` Kiryl Shutsemau
2026-06-08 9:50 ` Yan Zhao
2026-07-01 1:45 ` Edgecombe, Rick P
2026-07-01 5:37 ` Yan Zhao
2026-07-01 1:05 ` Edgecombe, Rick P
2026-05-26 2:35 ` [PATCH v6 07/11] KVM: TDX: Allocate PAMT memory for TD and vCPU control structures Rick Edgecombe
2026-07-02 8:55 ` Binbin Wu
2026-05-26 2:35 ` [PATCH v6 08/11] x86/tdx: Add APIs to support Dynamic PAMT ops from KVM's fault path Rick Edgecombe
2026-06-04 17:11 ` Kiryl Shutsemau
2026-07-02 9:32 ` Binbin Wu
2026-05-26 2:35 ` [PATCH v6 09/11] KVM: TDX: Get/put PAMT pages when (un)mapping private memory Rick Edgecombe
2026-07-03 3:15 ` Binbin Wu
2026-07-06 20:47 ` Edgecombe, Rick P [this message]
2026-07-06 21:02 ` Sean Christopherson
2026-07-06 21:52 ` Edgecombe, Rick P
2026-05-26 2:35 ` [PATCH v6 10/11] x86/virt/tdx: Enable Dynamic PAMT Rick Edgecombe
2026-06-04 17:14 ` Kiryl Shutsemau
2026-06-05 5:25 ` Chao Gao
2026-07-01 1:20 ` Edgecombe, Rick P
2026-07-06 20:48 ` Edgecombe, Rick P
2026-07-03 4:35 ` Binbin Wu
2026-05-26 2:35 ` [PATCH v6 11/11] Documentation/x86: Add documentation for TDX's " Rick Edgecombe
2026-07-03 4:54 ` Binbin Wu
2026-06-08 5:45 ` [PATCH v6 00/11] " Tony Lindgren
2026-07-06 21:01 ` Edgecombe, Rick P
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=2bdcc07d98df66954b9508be537b6f6a7c9f88de.camel@intel.com \
--to=rick.p.edgecombe@intel.com \
--cc=binbin.wu@linux.intel.com \
--cc=bp@alien8.de \
--cc=chao.gao@intel.com \
--cc=dave.hansen@intel.com \
--cc=hpa@zytor.com \
--cc=kai.huang@intel.com \
--cc=kas@kernel.org \
--cc=kirill.shutemov@linux.intel.com \
--cc=kvm@vger.kernel.org \
--cc=linux-coco@lists.linux.dev \
--cc=linux-doc@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@redhat.com \
--cc=nik.borisov@suse.com \
--cc=pbonzini@redhat.com \
--cc=seanjc@google.com \
--cc=tglx@kernel.org \
--cc=vannapurve@google.com \
--cc=x86@kernel.org \
--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