From: Sean Christopherson <sean.j.christopherson@intel.com>
To: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Cc: x86@kernel.org, linux-sgx@vger.kernel.org,
linux-kernel@vger.kernel.org,
Jethro Beekman <jethro@fortanix.com>,
Haitao Huang <haitao.huang@linux.intel.com>,
Chunyang Hui <sanqian.hcy@antfin.com>,
Jordan Hand <jorhand@linux.microsoft.com>,
Nathaniel McCallum <npmccallum@redhat.com>,
Seth Moore <sethmo@google.com>,
Suresh Siddha <suresh.b.siddha@intel.com>,
akpm@linux-foundation.org, andriy.shevchenko@linux.intel.com,
asapek@google.com, bp@alien8.de, cedric.xing@intel.com,
chenalexchen@google.com, conradparker@google.com,
cyhanish@google.com, dave.hansen@intel.com,
haitao.huang@intel.com, josh@joshtriplett.org,
kai.huang@intel.com, kai.svahn@intel.com, kmoy@google.com,
ludloff@google.com, luto@kernel.org, nhorman@redhat.com,
puiterwijk@redhat.com, rientjes@google.com, tglx@linutronix.de,
yaozhangx@google.com
Subject: Re: [PATCH v34 12/24] x86/sgx: Add SGX_IOC_ENCLAVE_CREATE
Date: Mon, 6 Jul 2020 20:29:15 -0700 [thread overview]
Message-ID: <20200707032915.GC5208@linux.intel.com> (raw)
In-Reply-To: <20200707030204.126021-13-jarkko.sakkinen@linux.intel.com>
On Tue, Jul 07, 2020 at 06:01:52AM +0300, Jarkko Sakkinen wrote:
> +long sgx_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
> +{
> + struct sgx_encl *encl = filep->private_data;
> + int ret, encl_flags;
> +
> + encl_flags = atomic_fetch_or(SGX_ENCL_IOCTL, &encl->flags);
> + if (encl_flags & SGX_ENCL_IOCTL)
> + return -EBUSY;
As called out in my belated feedback, SGX_ENCL_DEAD needs to be checked
here to prevent invoking ENCLS operations on a dead enclave. If you're
splitting hairs, the check could technically be deferred until the next
patch, "Add SGX_IOC_ENCLAVE_ADD_PAGES", which is the first usage of
sgx_encl_destroy() from an ioctl(), but that seems a bit gratuitous.
> +
> + switch (cmd) {
> + case SGX_IOC_ENCLAVE_CREATE:
> + ret = sgx_ioc_enclave_create(encl, (void __user *)arg);
> + break;
> + default:
> + ret = -ENOIOCTLCMD;
> + break;
> + }
> +
> + atomic_andnot(SGX_ENCL_IOCTL, &encl->flags);
> + return ret;
> +}
> --
> 2.25.1
>
next prev parent reply other threads:[~2020-07-07 3:29 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-07 3:01 [PATCH v34 00/24] Intel SGX foundations Jarkko Sakkinen
2020-07-07 3:01 ` [PATCH v34 01/24] x86/cpufeatures: x86/msr: Add Intel SGX hardware bits Jarkko Sakkinen
2020-07-07 3:01 ` [PATCH v34 02/24] x86/cpufeatures: x86/msr: Add Intel SGX Launch Control " Jarkko Sakkinen
2020-07-07 3:01 ` [PATCH v34 03/24] x86/mm: x86/sgx: Signal SIGSEGV with PF_SGX Jarkko Sakkinen
2020-07-07 3:01 ` [PATCH v34 04/24] x86/sgx: Add SGX microarchitectural data structures Jarkko Sakkinen
2020-07-07 3:01 ` [PATCH v34 05/24] x86/sgx: Add wrappers for ENCLS leaf functions Jarkko Sakkinen
2020-07-07 3:01 ` [PATCH v34 06/24] x86/cpu/intel: Detect SGX support Jarkko Sakkinen
2020-07-07 3:01 ` [PATCH v34 07/24] x86/cpu/intel: Add nosgx kernel parameter Jarkko Sakkinen
2020-07-07 3:01 ` [PATCH v34 08/24] x86/sgx: Initialize metadata for Enclave Page Cache (EPC) sections Jarkko Sakkinen
2020-07-07 3:01 ` [PATCH v34 09/24] x86/sgx: Add __sgx_alloc_epc_page() and sgx_free_epc_page() Jarkko Sakkinen
2020-07-07 3:01 ` [PATCH v34 10/24] mm: Add vm_ops->mprotect() Jarkko Sakkinen
2020-07-07 3:14 ` Matthew Wilcox
2020-07-07 3:22 ` Sean Christopherson
2020-07-07 3:24 ` Matthew Wilcox
2020-07-07 4:01 ` Jarkko Sakkinen
2020-07-07 4:10 ` Matthew Wilcox
2020-07-08 14:33 ` Jarkko Sakkinen
2020-07-08 14:37 ` Matthew Wilcox
2020-07-08 16:10 ` Jarkko Sakkinen
2020-07-08 22:56 ` Jarkko Sakkinen
2020-07-07 4:03 ` Jarkko Sakkinen
2020-07-07 3:01 ` [PATCH v34 11/24] x86/sgx: Add SGX enclave driver Jarkko Sakkinen
2020-07-07 3:36 ` Matthew Wilcox
2020-07-07 4:11 ` Jarkko Sakkinen
2020-07-07 4:29 ` Sean Christopherson
2020-07-07 4:39 ` Matthew Wilcox
2020-07-07 4:46 ` Sean Christopherson
2020-07-07 3:01 ` [PATCH v34 12/24] x86/sgx: Add SGX_IOC_ENCLAVE_CREATE Jarkko Sakkinen
2020-07-07 3:29 ` Sean Christopherson [this message]
2020-07-07 4:04 ` Jarkko Sakkinen
2020-07-07 3:01 ` [PATCH v34 13/24] x86/sgx: Add SGX_IOC_ENCLAVE_ADD_PAGES Jarkko Sakkinen
2020-07-07 3:01 ` [PATCH v34 14/24] x86/sgx: Add SGX_IOC_ENCLAVE_INIT Jarkko Sakkinen
2020-07-07 3:01 ` [PATCH v34 15/24] x86/sgx: Allow a limited use of ATTRIBUTE.PROVISIONKEY for attestation Jarkko Sakkinen
2020-07-07 3:01 ` [PATCH v34 16/24] x86/sgx: Add a page reclaimer Jarkko Sakkinen
2020-07-07 3:01 ` [PATCH v34 17/24] x86/sgx: ptrace() support for the SGX driver Jarkko Sakkinen
2020-07-07 3:01 ` [PATCH v34 18/24] x86/vdso: Add support for exception fixup in vDSO functions Jarkko Sakkinen
2020-07-07 3:01 ` [PATCH v34 19/24] x86/fault: Add helper function to sanitize error code Jarkko Sakkinen
2020-07-07 3:02 ` [PATCH v34 20/24] x86/traps: Attempt to fixup exceptions in vDSO before signaling Jarkko Sakkinen
2020-07-07 3:02 ` [PATCH v34 21/24] x86/vdso: Implement a vDSO for Intel SGX enclave call Jarkko Sakkinen
2020-07-07 3:02 ` [PATCH v34 22/24] selftests/x86: Add a selftest for SGX Jarkko Sakkinen
2020-07-07 3:02 ` [PATCH v34 23/24] docs: x86/sgx: Document SGX micro architecture and kernel internals Jarkko Sakkinen
2020-07-07 3:02 ` [PATCH v34 24/24] x86/sgx: Update MAINTAINERS Jarkko Sakkinen
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