From: Xiaoyao Li <xiaoyao.li@intel.com>
To: Dexuan Cui <decui@microsoft.com>,
ak@linux.intel.com, arnd@arndb.de, bp@alien8.de,
brijesh.singh@amd.com, dan.j.williams@intel.com,
dave.hansen@intel.com, dave.hansen@linux.intel.com,
haiyangz@microsoft.com, hpa@zytor.com, jane.chu@oracle.com,
kirill.shutemov@linux.intel.com, kys@microsoft.com,
linux-arch@vger.kernel.org, linux-hyperv@vger.kernel.org,
luto@kernel.org, mingo@redhat.com, peterz@infradead.org,
rostedt@goodmis.org, sathyanarayanan.kuppuswamy@linux.intel.com,
seanjc@google.com, tglx@linutronix.de, tony.luck@intel.com,
wei.liu@kernel.org, x86@kernel.org, mikelley@microsoft.com
Cc: linux-kernel@vger.kernel.org, Tianyu.Lan@microsoft.com,
rick.p.edgecombe@intel.com
Subject: Re: [PATCH v9 1/2] x86/tdx: Retry TDVMCALL_MAP_GPA() when needed
Date: Wed, 19 Jul 2023 10:31:06 +0800 [thread overview]
Message-ID: <e3d2c81f-16e9-9a62-9fcb-d9552c3f12d2@intel.com> (raw)
In-Reply-To: <20230621191317.4129-2-decui@microsoft.com>
On 6/22/2023 3:13 AM, Dexuan Cui wrote:
> GHCI spec for TDX 1.0 says that the MapGPA call may fail with the R10
> error code = TDG.VP.VMCALL_RETRY (1), and the guest must retry this
> operation for the pages in the region starting at the GPA specified
> in R11.
>
> When a fully enlightened TDX guest runs on Hyper-V, Hyper-V can return
> the retry error when set_memory_decrypted() is called to decrypt up to
> 1GB of swiotlb bounce buffers.
just out of curiosity, what size does Hyper-v handle at most in one call?
next prev parent reply other threads:[~2023-07-19 2:31 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-21 19:13 [PATCH v9 0/2] Support TDX guests on Hyper-V (the x86/tdx part) Dexuan Cui
2023-06-21 19:13 ` [PATCH v9 1/2] x86/tdx: Retry TDVMCALL_MAP_GPA() when needed Dexuan Cui
2023-07-19 2:31 ` Xiaoyao Li [this message]
2023-07-27 0:19 ` Dexuan Cui
2023-06-21 19:13 ` [PATCH v9 2/2] x86/tdx: Support vmalloc() for tdx_enc_status_changed() Dexuan Cui
2023-06-28 18:05 ` [PATCH v9 0/2] Support TDX guests on Hyper-V (the x86/tdx part) Wei Liu
2023-06-28 18:45 ` Dexuan Cui
2023-07-10 17:20 ` Dexuan Cui
2023-07-27 0:29 ` Dexuan Cui
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