From: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
To: Jarkko Sakkinen <jarkko@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
"H. Peter Anvin" <hpa@zytor.com>,
Andrew Morton <akpm@linux-foundation.org>,
Shuah Khan <shuah@kernel.org>,
haitao.huang@intel.com, Kai Huang <kai.huang@intel.com>,
x86@kernel.org, linux-sgx@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
linux-kselftest@vger.kernel.org,
Jia Zhang <zhang.jia@linux.alibaba.com>
Cc: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
Subject: [PATCH] x86/sgx: Allows ioctl PROVISION to execute before CREATE
Date: Mon, 18 Jan 2021 21:33:35 +0800 [thread overview]
Message-ID: <20210118133335.98907-1-tianjia.zhang@linux.alibaba.com> (raw)
In function sgx_encl_create(), the logic of directly assigning
value to attributes_mask determines that the call to
SGX_IOC_ENCLAVE_PROVISION must be after the command of
SGX_IOC_ENCLAVE_CREATE. If change this assignment statement to
or operation, the PROVISION command can be executed earlier and
more flexibly.
Reported-by: Jia Zhang <zhang.jia@linux.alibaba.com>
Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
---
arch/x86/kernel/cpu/sgx/ioctl.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/kernel/cpu/sgx/ioctl.c b/arch/x86/kernel/cpu/sgx/ioctl.c
index f45957c05f69..0ca3fc238bc2 100644
--- a/arch/x86/kernel/cpu/sgx/ioctl.c
+++ b/arch/x86/kernel/cpu/sgx/ioctl.c
@@ -108,7 +108,7 @@ static int sgx_encl_create(struct sgx_encl *encl, struct sgx_secs *secs)
encl->base = secs->base;
encl->size = secs->size;
encl->attributes = secs->attributes;
- encl->attributes_mask = SGX_ATTR_DEBUG | SGX_ATTR_MODE64BIT | SGX_ATTR_KSS;
+ encl->attributes_mask |= SGX_ATTR_DEBUG | SGX_ATTR_MODE64BIT | SGX_ATTR_KSS;
/* Set only after completion, as encl->lock has not been taken. */
set_bit(SGX_ENCL_CREATED, &encl->flags);
--
2.19.1.3.ge56e4f7
next reply other threads:[~2021-01-18 13:52 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-18 13:33 Tianjia Zhang [this message]
2021-01-19 20:05 ` [PATCH] x86/sgx: Allows ioctl PROVISION to execute before CREATE Sean Christopherson
2021-01-20 3:57 ` Tianjia Zhang
2021-01-20 22:34 ` Jarkko Sakkinen
2021-01-20 22:37 ` Jarkko Sakkinen
2021-01-24 6:36 ` Tianjia Zhang
2021-01-20 14:31 ` Jarkko Sakkinen
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=20210118133335.98907-1-tianjia.zhang@linux.alibaba.com \
--to=tianjia.zhang@linux.alibaba.com \
--cc=akpm@linux-foundation.org \
--cc=bp@alien8.de \
--cc=haitao.huang@intel.com \
--cc=hpa@zytor.com \
--cc=jarkko@kernel.org \
--cc=kai.huang@intel.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-kselftest@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=linux-sgx@vger.kernel.org \
--cc=mingo@redhat.com \
--cc=shuah@kernel.org \
--cc=tglx@linutronix.de \
--cc=x86@kernel.org \
--cc=zhang.jia@linux.alibaba.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;
as well as URLs for NNTP newsgroup(s).