From: Jarkko Sakkinen <jarkko@kernel.org>
To: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
Cc: 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>
Subject: Re: [PATCH v3 4/5] x86/sgx: Allows ioctl PROVISION to execute before CREATE
Date: Sat, 30 Jan 2021 15:26:20 +0200 [thread overview]
Message-ID: <YBVefNF9x4mQRpSB@kernel.org> (raw)
In-Reply-To: <20210124062907.88229-5-tianjia.zhang@linux.alibaba.com>
On Sun, Jan 24, 2021 at 02:29:06PM +0800, Tianjia Zhang wrote:
> 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() to avoid this restriction.
>
> Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
The commit message should explicit that the API behaviour changes
as the result. Please don't use hyphens in quoting.
/Jarkko
> ---
> 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 f2eac41bb4ff..fba0d0bfe976 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:[~2021-01-30 13:27 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-24 6:29 [PATCH v3 0/5] Some optimizations related to sgx Tianjia Zhang
2021-01-24 6:29 ` [PATCH v3 1/5] selftests/x86: Simplify the code to get vdso base address in sgx Tianjia Zhang
2021-01-24 6:29 ` [PATCH v3 2/5] x86/sgx: Optimize the locking range in sgx_sanitize_section() Tianjia Zhang
2021-01-30 13:24 ` Jarkko Sakkinen
2021-01-24 6:29 ` [PATCH v3 3/5] x86/sgx: Optimize the free_cnt count in sgx_epc_section Tianjia Zhang
2021-01-27 17:40 ` Jarkko Sakkinen
2021-02-11 6:04 ` Tianjia Zhang
2021-02-12 12:19 ` Jarkko Sakkinen
2021-02-16 3:30 ` Tianjia Zhang
2021-01-24 6:29 ` [PATCH v3 4/5] x86/sgx: Allows ioctl PROVISION to execute before CREATE Tianjia Zhang
2021-01-30 13:26 ` Jarkko Sakkinen [this message]
2021-02-01 12:55 ` Tianjia Zhang
2021-01-24 6:29 ` [PATCH v3 5/5] x86/sgx: Remove redundant if conditions in sgx_encl_create Tianjia Zhang
2021-01-24 8:20 ` Greg KH
2021-01-25 18:46 ` Sean Christopherson
2021-01-30 14:33 ` Jarkko Sakkinen
2021-02-01 12:37 ` Tianjia Zhang
2021-01-25 17:22 ` [PATCH v3 0/5] Some optimizations related to sgx Jarkko Sakkinen
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