From: "Huang, Kai" <kai.huang@intel.com>
To: "Hansen, Dave" <dave.hansen@intel.com>,
"isaku.yamahata@gmail.com" <isaku.yamahata@gmail.com>
Cc: "kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"Luck, Tony" <tony.luck@intel.com>,
"david@redhat.com" <david@redhat.com>,
"bagasdotme@gmail.com" <bagasdotme@gmail.com>,
"ak@linux.intel.com" <ak@linux.intel.com>,
"Wysocki, Rafael J" <rafael.j.wysocki@intel.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"Chatre, Reinette" <reinette.chatre@intel.com>, "Christopherson,,
Sean" <seanjc@google.com>,
"pbonzini@redhat.com" <pbonzini@redhat.com>,
"tglx@linutronix.de" <tglx@linutronix.de>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
"kirill.shutemov@linux.intel.com"
<kirill.shutemov@linux.intel.com>,
"Yamahata, Isaku" <isaku.yamahata@intel.com>,
"peterz@infradead.org" <peterz@infradead.org>,
"Shahar, Sagi" <sagis@google.com>,
"imammedo@redhat.com" <imammedo@redhat.com>,
"Gao, Chao" <chao.gao@intel.com>,
"Brown, Len" <len.brown@intel.com>,
"sathyanarayanan.kuppuswamy@linux.intel.com"
<sathyanarayanan.kuppuswamy@linux.intel.com>,
"Huang, Ying" <ying.huang@intel.com>,
"Williams, Dan J" <dan.j.williams@intel.com>
Subject: Re: [PATCH v10 05/16] x86/virt/tdx: Add skeleton to enable TDX on demand
Date: Thu, 23 Mar 2023 22:42:14 +0000 [thread overview]
Message-ID: <d2c3162f838001f8fa6516dbb7f623a43a3656a3.camel@intel.com> (raw)
In-Reply-To: <1e1bec34-36bd-a719-7d3b-23ab268f7092@intel.com>
On Thu, 2023-03-23 at 15:12 -0700, Hansen, Dave wrote:
> On 3/23/23 15:09, Huang, Kai wrote:
> > 1) In TDH.SYS.INIT, ask TDX module team to return TDX_RND_NO_ENTROPY instead of
> > TDX_SYS_BUSY when running out of entropy.
> >
> > 2) In TDH.SYS.KEY.CONFIG, ask TDX module to return TDX_RND_NO_ENTROPY instead of
> > TDX_KEY_GENERATION_FAILED when running out of entropy. Whether
> > TDX_KEY_GENERATION_FAILED should be still kept is up to TDX module team
> > (because it looks running concurrent PCONFIGs is also related).
> >
> > 3) Ask TDX module to always return TDX_RND_NO_ENTROPY in _ALL_ SEAMCALLs and
> > keep this behaviour for future TDX modules too.
>
> Yes, that's all fine.
>
> > 4) In the common seamcall(), retry on TDX_RND_NO_ENTROPY.
> >
> > In terms of how many times to retry, I will use a fixed value for now, similar
> > to the kernel code below:
> >
> > #define RDRAND_RETRY_LOOPS 10
>
> Heck, you could even just use RDRAND_RETRY_LOOPS directly. It's
> hard(er) to bikeshed your choice of a random number that you didn't even
> pick.
Yes I'll just include the header and use it. Thanks.
next prev parent reply other threads:[~2023-03-23 22:42 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-06 14:13 [PATCH v10 00/16] TDX host kernel support Kai Huang
2023-03-06 14:13 ` [PATCH v10 01/16] x86/tdx: Define TDX supported page sizes as macros Kai Huang
2023-03-16 12:37 ` David Hildenbrand
2023-03-16 22:41 ` Huang, Kai
2023-03-06 14:13 ` [PATCH v10 02/16] x86/virt/tdx: Detect TDX during kernel boot Kai Huang
2023-03-16 12:48 ` David Hildenbrand
2023-03-16 22:37 ` Huang, Kai
2023-03-23 17:02 ` David Hildenbrand
2023-03-23 22:15 ` Huang, Kai
2023-03-06 14:13 ` [PATCH v10 03/16] x86/virt/tdx: Make INTEL_TDX_HOST depend on X86_X2APIC Kai Huang
2023-03-16 12:57 ` David Hildenbrand
2023-03-06 14:13 ` [PATCH v10 04/16] x86/virt/tdx: Add SEAMCALL infrastructure Kai Huang
2023-03-06 14:13 ` [PATCH v10 05/16] x86/virt/tdx: Add skeleton to enable TDX on demand Kai Huang
2023-03-08 22:27 ` Isaku Yamahata
2023-03-12 23:08 ` Huang, Kai
2023-03-13 23:49 ` Isaku Yamahata
2023-03-14 1:50 ` Huang, Kai
2023-03-14 4:02 ` Isaku Yamahata
2023-03-14 5:45 ` Dave Hansen
2023-03-14 17:16 ` Isaku Yamahata
2023-03-14 17:38 ` Dave Hansen
2023-03-14 15:48 ` Dave Hansen
2023-03-15 11:10 ` Huang, Kai
2023-03-16 22:07 ` Huang, Kai
2023-03-23 13:49 ` Dave Hansen
2023-03-23 22:09 ` Huang, Kai
2023-03-23 22:12 ` Dave Hansen
2023-03-23 22:42 ` Huang, Kai [this message]
2023-03-16 0:31 ` Isaku Yamahata
2023-03-16 2:45 ` Isaku Yamahata
2023-03-16 2:52 ` Huang, Kai
2023-03-06 14:13 ` [PATCH v10 06/16] x86/virt/tdx: Get information about TDX module and TDX-capable memory Kai Huang
2023-03-06 14:13 ` [PATCH v10 07/16] x86/virt/tdx: Use all system memory when initializing TDX module as TDX memory Kai Huang
2023-03-09 1:38 ` Isaku Yamahata
2023-03-06 14:13 ` [PATCH v10 08/16] x86/virt/tdx: Add placeholder to construct TDMRs to cover all TDX memory regions Kai Huang
2023-03-06 14:13 ` [PATCH v10 09/16] x86/virt/tdx: Fill out " Kai Huang
2023-03-06 14:13 ` [PATCH v10 10/16] x86/virt/tdx: Allocate and set up PAMTs for TDMRs Kai Huang
2023-03-21 7:44 ` Dong, Eddie
2023-03-21 8:05 ` Huang, Kai
2023-03-06 14:13 ` [PATCH v10 11/16] x86/virt/tdx: Designate reserved areas for all TDMRs Kai Huang
2023-03-06 14:13 ` [PATCH v10 12/16] x86/virt/tdx: Configure TDX module with the TDMRs and global KeyID Kai Huang
2023-03-06 14:13 ` [PATCH v10 13/16] x86/virt/tdx: Configure global KeyID on all packages Kai Huang
2023-03-06 14:13 ` [PATCH v10 14/16] x86/virt/tdx: Initialize all TDMRs Kai Huang
2023-03-06 14:14 ` [PATCH v10 15/16] x86/virt/tdx: Flush cache in kexec() when TDX is enabled Kai Huang
2023-03-06 14:14 ` [PATCH v10 16/16] Documentation/x86: Add documentation for TDX host support Kai Huang
2023-03-08 1:11 ` [PATCH v10 00/16] TDX host kernel support Isaku Yamahata
2023-03-16 12:35 ` David Hildenbrand
2023-03-16 22:06 ` Huang, Kai
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