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>,
Sean Christopherson <seanjc@google.com>,
Shuah Khan <shuah@kernel.org>,
x86@kernel.org, linux-sgx@vger.kernel.org,
linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org,
Jia Zhang <zhang.jia@linux.alibaba.com>
Cc: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
Subject: [PATCH v5 2/3] x86/sgx: Allows ioctl PROVISION to execute before CREATE
Date: Tue, 16 Feb 2021 11:31:32 +0800 [thread overview]
Message-ID: <20210216033133.79543-3-tianjia.zhang@linux.alibaba.com> (raw)
In-Reply-To: <20210216033133.79543-1-tianjia.zhang@linux.alibaba.com>
In the function sgx_create_enclave(), the direct assignment
operation of attributes_mask determines that the ioctl PROVISION
operation must be executed after the ioctl CREATE operation,
which will limit the flexibility of SGX developers.
This patch takes the assignment of attributes_mask from the
function sgx_create_enclave() has been moved to the function
sgx_open(), this will allow users to perform ioctl PROVISION
operations before ioctl CREATE, increase the flexibility of
the API and reduce restrictions.
Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
---
arch/x86/kernel/cpu/sgx/driver.c | 1 +
arch/x86/kernel/cpu/sgx/ioctl.c | 1 -
2 files changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/kernel/cpu/sgx/driver.c b/arch/x86/kernel/cpu/sgx/driver.c
index 8ce6d8371cfb..892e2a2a3221 100644
--- a/arch/x86/kernel/cpu/sgx/driver.c
+++ b/arch/x86/kernel/cpu/sgx/driver.c
@@ -36,6 +36,7 @@ static int sgx_open(struct inode *inode, struct file *file)
return ret;
}
+ encl->attributes_mask = SGX_ATTR_DEBUG | SGX_ATTR_MODE64BIT | SGX_ATTR_KSS;
file->private_data = encl;
return 0;
diff --git a/arch/x86/kernel/cpu/sgx/ioctl.c b/arch/x86/kernel/cpu/sgx/ioctl.c
index 90a5caf76939..1c6ecf9fbeff 100644
--- a/arch/x86/kernel/cpu/sgx/ioctl.c
+++ b/arch/x86/kernel/cpu/sgx/ioctl.c
@@ -109,7 +109,6 @@ 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;
/* Set only after completion, as encl->lock has not been taken. */
set_bit(SGX_ENCL_CREATED, &encl->flags);
--
2.19.1.3.ge56e4f7
next prev parent reply other threads:[~2021-02-16 3:33 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-16 3:31 [PATCH v5 0/3] Some optimizations related to sgx Tianjia Zhang
2021-02-16 3:31 ` [PATCH v5 1/3] selftests/x86: Use getauxval() to simplify the code in sgx Tianjia Zhang
2021-02-16 3:31 ` Tianjia Zhang [this message]
2021-02-16 3:31 ` [PATCH v5 3/3] x86/sgx: Remove redundant if conditions in sgx_encl_create Tianjia Zhang
2021-02-16 8:29 ` Jarkko Sakkinen
2021-02-24 9:31 ` Tianjia Zhang
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