From: Jarkko Sakkinen <jarkko@kernel.org>
To: Cathy Zhang <cathy.zhang@intel.com>
Cc: linux-sgx@vger.kernel.org, x86@kernel.org,
reinette.chatre@intel.com, dave.hansen@intel.com,
ashok.raj@intel.com, chao.p.peng@linux.intel.com,
yang.zhong@intel.com
Subject: Re: [PATCH v5 2/9] x86/sgx: Save enclave pointer for VA page
Date: Fri, 20 May 2022 22:07:06 +0300 [thread overview]
Message-ID: <Yofm2hDXF2KCNnL7@iki.fi> (raw)
In-Reply-To: <20220520103904.1216-3-cathy.zhang@intel.com>
On Fri, May 20, 2022 at 06:38:57PM +0800, Cathy Zhang wrote:
> Tearing down all enclaves is required by SGX SVN update, which
> involves running the ENCLS[EREMOVE] instruction on every EPC
> page. This (tearing down all enclaves) should be coordinated
> with any enclaves that may be in the process of existing and thus
> already be running ENCLS[EREMOVE] as part of enclave release.
>
> In support of this coordination, it is required to know which enclave
> owns each in-use EPC page. It is already possible to locate the
> owning enclave of SECS and regular pages but not for VA pages.
>
> Make the following changes for VA pages' location:
> 1) Make epc->owner type-agnostic by changing its type to 'void *'. So,
> besides "struct sgx_encl_page", it can have other types, like
> "struct sgx_va_page".
> 2) Save the enclave pointer for each VA page to support locating its
> owning enclave.
Enumeration lists imply that you would better to split this into
two patches.
BR, Jarkko
next prev parent reply other threads:[~2022-05-20 19:08 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-20 10:38 [PATCH v5 0/9] Support microcode updates affecting SGX Cathy Zhang
2022-05-20 10:38 ` [PATCH v5 1/9] x86/sgx: Introduce mechanism to prevent new initializations of EPC pages Cathy Zhang
2022-05-20 19:05 ` Jarkko Sakkinen
2022-05-20 10:38 ` [PATCH v5 2/9] x86/sgx: Save enclave pointer for VA page Cathy Zhang
2022-05-20 19:07 ` Jarkko Sakkinen [this message]
2022-05-20 10:38 ` [PATCH v5 3/9] x86/sgx: Keep record for SGX VA and Guest page type Cathy Zhang
2022-05-20 19:11 ` Jarkko Sakkinen
2022-05-23 0:06 ` Zhang, Cathy
2022-05-23 6:09 ` Zhang, Cathy
2022-05-23 19:19 ` Jarkko Sakkinen
2022-05-20 10:38 ` [PATCH v5 4/9] x86/sgx: Save the size of each EPC section Cathy Zhang
2022-05-20 10:39 ` [PATCH v5 5/9] x86/sgx: Forced EPC page zapping for EUPDATESVN Cathy Zhang
2022-05-20 10:39 ` [PATCH v5 6/9] x86/sgx: Define error codes for ENCLS[EUPDATESVN] Cathy Zhang
2022-05-20 10:39 ` [PATCH v5 7/9] x86/sgx: Implement ENCLS[EUPDATESVN] Cathy Zhang
2022-05-20 10:39 ` [PATCH v5 8/9] x86/cpu: Call ENCLS[EUPDATESVN] procedure in microcode update Cathy Zhang
2022-05-20 10:39 ` [PATCH v5 9/9] x86/sgx: Call ENCLS[EUPDATESVN] during SGX initialization Cathy Zhang
2022-05-24 19:15 ` [PATCH v5 0/9] Support microcode updates affecting SGX Thomas Gleixner
2022-05-24 19:26 ` Borislav Petkov
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