From: Thomas Gleixner <tglx@linutronix.de>
To: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Cc: x86@kernel.org, platform-driver-x86@vger.kernel.org,
dave.hansen@intel.com, sean.j.christopherson@intel.com,
nhorman@redhat.com, npmccallum@redhat.com,
linux-sgx@vger.kernel.org, Ingo Molnar <mingo@redhat.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Vikas Shivappa <vikas.shivappa@linux.intel.com>,
"Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
Andi Kleen <ak@linux.intel.com>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
"open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)"
<linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v12 06/13] x86/sgx: detect Intel SGX
Date: Tue, 3 Jul 2018 21:09:52 +0200 (CEST) [thread overview]
Message-ID: <alpine.DEB.2.21.1807032105290.1816@nanos.tec.linutronix.de> (raw)
In-Reply-To: <20180703182118.15024-7-jarkko.sakkinen@linux.intel.com>
On Tue, 3 Jul 2018, Jarkko Sakkinen wrote:
> @@ -0,0 +1,54 @@
> +// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
> +// Copyright(c) 2016-17 Intel Corporation.
> +
> +#include <asm/sgx.h>
> +#include <asm/sgx_pr.h>
> +#include <linux/freezer.h>
> +#include <linux/highmem.h>
> +#include <linux/kthread.h>
> +#include <linux/ratelimit.h>
> +#include <linux/sched/signal.h>
> +#include <linux/slab.h>
The common include ordering is
include linux/....
include asm/...
> +
> +bool sgx_enabled __ro_after_init;
> +EXPORT_SYMBOL(sgx_enabled);
> +bool sgx_lc_enabled __ro_after_init;
> +EXPORT_SYMBOL(sgx_lc_enabled);
> +
> +static __init bool sgx_is_enabled(bool *lc_enabled)
> +{
> + unsigned long fc;
> +
> + if (!boot_cpu_has(X86_FEATURE_SGX))
> + return false;
> +
> + if (!boot_cpu_has(X86_FEATURE_SGX1))
> + return false;
> +
> + rdmsrl(MSR_IA32_FEATURE_CONTROL, fc);
> + if (!(fc & FEATURE_CONTROL_LOCKED)) {
> + pr_info("IA32_FEATURE_CONTROL MSR is not locked\n");
> + return false;
> + }
> +
> + if (!(fc & FEATURE_CONTROL_SGX_ENABLE)) {
> + pr_info("disabled by the firmware\n");
> + return false;
> + }
> +
> + if (!(fc & FEATURE_CONTROL_SGX_LE_WR)) {
> + pr_info("IA32_SGXLEPUBKEYHASHn MSRs are not writable\n");
> + return false;
> + }
> +
> + *lc_enabled = !!(fc & FEATURE_CONTROL_SGX_LE_WR);
> + return true;
> +}
> +
> +static __init int sgx_init(void)
> +{
> + sgx_enabled = sgx_is_enabled(&sgx_lc_enabled);
This is horrible, really. Both variables are global. So what the heck is
wrong with assigning them directly in the function?
Thanks,
tglx
next prev parent reply other threads:[~2018-07-03 19:10 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-03 18:19 [PATCH v12 00/13] Intel SGX1 support Jarkko Sakkinen
2018-07-03 18:19 ` [PATCH v12 01/13] x86/sgx: updated MAINTAINERS Jarkko Sakkinen
2018-07-03 18:41 ` Thomas Gleixner
2018-07-04 17:23 ` Jarkko Sakkinen
2018-07-03 18:19 ` [PATCH v12 02/13] x86/sgx: add SGX definitions to cpufeature Jarkko Sakkinen
2018-07-03 18:48 ` Thomas Gleixner
2018-07-04 17:24 ` Jarkko Sakkinen
2018-07-03 18:19 ` [PATCH v12 03/13] x86/sgx: add SGX definitions to msr-index.h Jarkko Sakkinen
2018-07-03 18:31 ` Dave Hansen
2018-07-04 17:25 ` Jarkko Sakkinen
2018-07-05 16:05 ` Jarkko Sakkinen
2018-07-05 16:08 ` Jarkko Sakkinen
2018-07-05 16:09 ` Dave Hansen
2018-07-03 18:51 ` Thomas Gleixner
2018-07-04 17:26 ` Jarkko Sakkinen
2018-07-03 18:19 ` [PATCH v12 04/13] x86/cpufeatures: add Intel-defined SGX leaf CPUID_12_EAX Jarkko Sakkinen
2018-07-03 18:54 ` Thomas Gleixner
2018-07-04 17:27 ` Jarkko Sakkinen
2018-07-03 18:19 ` [PATCH v12 05/13] x86/sgx: architectural structures Jarkko Sakkinen
2018-07-03 19:02 ` Dave Hansen
2018-07-04 18:03 ` Jarkko Sakkinen
2018-07-03 19:04 ` Thomas Gleixner
2018-07-04 18:07 ` Jarkko Sakkinen
2018-07-03 21:22 ` Dave Hansen
2018-07-04 18:09 ` Jarkko Sakkinen
2018-07-05 15:31 ` Dave Hansen
2018-07-05 20:09 ` Jarkko Sakkinen
2018-07-05 21:50 ` hpa
2018-07-10 8:06 ` Andy Shevchenko
2018-07-10 11:57 ` Thomas Gleixner
2018-07-03 18:19 ` [PATCH v12 06/13] x86/sgx: detect Intel SGX Jarkko Sakkinen
2018-07-03 19:09 ` Thomas Gleixner [this message]
2018-07-04 17:28 ` Jarkko Sakkinen
2018-07-03 18:19 ` [PATCH v12 07/13] x86/sgx: data structures for tracking available EPC pages Jarkko Sakkinen
2018-07-03 19:03 ` Dave Hansen
2018-07-04 17:34 ` Jarkko Sakkinen
2018-07-03 19:46 ` Thomas Gleixner
2018-07-03 20:26 ` Randy Dunlap
2018-07-03 20:44 ` Thomas Gleixner
2018-07-04 17:36 ` Jarkko Sakkinen
2018-07-03 18:19 ` [PATCH v12 08/13] x86/sgx: wrappers for ENCLS opcode leaf functions Jarkko Sakkinen
2018-07-03 20:16 ` Thomas Gleixner
2018-07-04 17:33 ` Jarkko Sakkinen
2018-07-03 18:19 ` [PATCH v12 09/13] x86/sgx: EPC page allocation routines Jarkko Sakkinen
2018-07-03 20:41 ` Thomas Gleixner
2018-07-04 4:25 ` Borislav Petkov
2018-07-05 18:21 ` Jarkko Sakkinen
2018-07-04 18:24 ` Jarkko Sakkinen
2018-07-03 18:19 ` [PATCH v12 10/13] x86/sgx: sgx_einit() Jarkko Sakkinen
2018-07-03 18:19 ` [PATCH v12 11/13] platform/x86: Intel SGX driver Jarkko Sakkinen
2018-07-25 15:52 ` Jethro Beekman
2018-07-28 13:23 ` Jarkko Sakkinen
2018-07-03 18:19 ` [PATCH v12 12/13] platform/x86: ptrace() support for the " Jarkko Sakkinen
2018-07-03 18:19 ` [PATCH v12 13/13] x86/sgx: driver documentation Jarkko Sakkinen
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