From: Sean Christopherson <sean.j.christopherson@intel.com>
To: "Paolo Bonzini" <pbonzini@redhat.com>,
"Radim Krčmář" <rkrcmar@redhat.com>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Ingo Molnar" <mingo@redhat.com>,
"Borislav Petkov" <bp@alien8.de>,
x86@kernel.org,
"Jarkko Sakkinen" <jarkko.sakkinen@linux.intel.com>,
"Sean Christopherson" <sean.j.christopherson@intel.com>,
"Joerg Roedel" <joro@8bytes.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-sgx@vger.kernel.org, Andy Lutomirski <luto@amacapital.net>
Subject: [RFC PATCH 02/21] x86/sgx: Move bus registration and device init to common code
Date: Fri, 26 Jul 2019 22:51:55 -0700 [thread overview]
Message-ID: <20190727055214.9282-3-sean.j.christopherson@intel.com> (raw)
In-Reply-To: <20190727055214.9282-1-sean.j.christopherson@intel.com>
Move the SGX bus registration and initialization into common code in
preparation for adding a virtual EPC device, which will reside outside
of the native SGX userspace driver.
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
---
arch/x86/kernel/cpu/sgx/driver/main.c | 48 +------------------------
arch/x86/kernel/cpu/sgx/main.c | 50 ++++++++++++++++++++++++++-
arch/x86/kernel/cpu/sgx/sgx.h | 4 +++
3 files changed, 54 insertions(+), 48 deletions(-)
diff --git a/arch/x86/kernel/cpu/sgx/driver/main.c b/arch/x86/kernel/cpu/sgx/driver/main.c
index a2506a49c95a..d62bdc7ed4d9 100644
--- a/arch/x86/kernel/cpu/sgx/driver/main.c
+++ b/arch/x86/kernel/cpu/sgx/driver/main.c
@@ -158,42 +158,10 @@ const struct file_operations sgx_provision_fops = {
.owner = THIS_MODULE,
};
-static struct bus_type sgx_bus_type = {
- .name = "sgx",
-};
-
static struct device sgx_encl_dev;
static struct cdev sgx_encl_cdev;
static struct device sgx_provision_dev;
static struct cdev sgx_provision_cdev;
-static dev_t sgx_devt;
-
-static void sgx_dev_release(struct device *dev)
-{
-}
-
-static __init int sgx_dev_init(const char *name, struct device *dev,
- struct cdev *cdev,
- const struct file_operations *fops, int minor)
-{
- int ret;
-
- device_initialize(dev);
-
- dev->bus = &sgx_bus_type;
- dev->devt = MKDEV(MAJOR(sgx_devt), minor);
- dev->release = sgx_dev_release;
-
- ret = dev_set_name(dev, name);
- if (ret) {
- put_device(dev);
- return ret;
- }
-
- cdev_init(cdev, fops);
- cdev->owner = THIS_MODULE;
- return 0;
-}
int __init sgx_drv_init(void)
{
@@ -207,14 +175,6 @@ int __init sgx_drv_init(void)
return -ENODEV;
}
- ret = bus_register(&sgx_bus_type);
- if (ret)
- return ret;
-
- ret = alloc_chrdev_region(&sgx_devt, 0, SGX_MAX_NR_DEVICES, "sgx");
- if (ret < 0)
- goto err_bus;
-
cpuid_count(SGX_CPUID, 0, &eax, &ebx, &ecx, &edx);
sgx_misc_reserved_mask = ~ebx | SGX_MISC_RESERVED_MASK;
sgx_encl_size_max_64 = 1ULL << ((edx >> 8) & 0xFF);
@@ -240,7 +200,7 @@ int __init sgx_drv_init(void)
ret = sgx_dev_init("sgx/enclave", &sgx_encl_dev, &sgx_encl_cdev,
&sgx_encl_fops, SGX_ENCL_DEV_MINOR);
if (ret)
- goto err_chrdev_region;
+ return ret;
ret = sgx_dev_init("sgx/provision", &sgx_provision_dev,
&sgx_provision_cdev, &sgx_provision_fops,
@@ -277,11 +237,5 @@ int __init sgx_drv_init(void)
err_encl_dev:
put_device(&sgx_encl_dev);
-err_chrdev_region:
- unregister_chrdev_region(sgx_devt, SGX_MAX_NR_DEVICES);
-
-err_bus:
- bus_unregister(&sgx_bus_type);
-
return ret;
}
diff --git a/arch/x86/kernel/cpu/sgx/main.c b/arch/x86/kernel/cpu/sgx/main.c
index f790a03571c5..edbd465083c7 100644
--- a/arch/x86/kernel/cpu/sgx/main.c
+++ b/arch/x86/kernel/cpu/sgx/main.c
@@ -1,6 +1,7 @@
// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
// Copyright(c) 2016-17 Intel Corporation.
+#include <linux/cdev.h>
#include <linux/freezer.h>
#include <linux/highmem.h>
#include <linux/kthread.h>
@@ -329,6 +330,39 @@ static __init int sgx_page_cache_init(void)
return 0;
}
+static struct bus_type sgx_bus_type = {
+ .name = "sgx",
+};
+static dev_t sgx_devt;
+
+static void sgx_dev_release(struct device *dev)
+{
+
+}
+
+__init int sgx_dev_init(const char *name, struct device *dev,
+ struct cdev *cdev, const struct file_operations *fops,
+ int minor)
+{
+ int ret;
+
+ device_initialize(dev);
+
+ dev->bus = &sgx_bus_type;
+ dev->devt = MKDEV(MAJOR(sgx_devt), minor);
+ dev->release = sgx_dev_release;
+
+ ret = dev_set_name(dev, name);
+ if (ret) {
+ put_device(dev);
+ return ret;
+ }
+
+ cdev_init(cdev, fops);
+ cdev->owner = THIS_MODULE;
+ return 0;
+}
+
static __init int sgx_init(void)
{
int ret;
@@ -344,12 +378,26 @@ static __init int sgx_init(void)
if (ret)
goto err_page_cache;
- ret = sgx_drv_init();
+ ret = bus_register(&sgx_bus_type);
if (ret)
goto err_kthread;
+ ret = alloc_chrdev_region(&sgx_devt, 0, SGX_MAX_NR_DEVICES, "sgx");
+ if (ret < 0)
+ goto err_bus;
+
+ ret = sgx_drv_init();
+ if (ret)
+ goto err_chrdev_region;
+
return 0;
+err_chrdev_region:
+ unregister_chrdev_region(sgx_devt, SGX_MAX_NR_DEVICES);
+
+err_bus:
+ bus_unregister(&sgx_bus_type);
+
err_kthread:
kthread_stop(ksgxswapd_tsk);
diff --git a/arch/x86/kernel/cpu/sgx/sgx.h b/arch/x86/kernel/cpu/sgx/sgx.h
index 4e2c3ce94f63..85b3674e1d43 100644
--- a/arch/x86/kernel/cpu/sgx/sgx.h
+++ b/arch/x86/kernel/cpu/sgx/sgx.h
@@ -93,4 +93,8 @@ int sgx_einit(struct sgx_sigstruct *sigstruct, struct sgx_einittoken *token,
#define SGX_PROV_DEV_MINOR 1
#define SGX_MAX_NR_DEVICES 2
+__init int sgx_dev_init(const char *name, struct device *dev,
+ struct cdev *cdev, const struct file_operations *fops,
+ int minor);
+
#endif /* _X86_SGX_H */
--
2.22.0
next prev parent reply other threads:[~2019-07-27 5:54 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-27 5:51 [RFC PATCH 00/21] x86/sgx: KVM: Add SGX virtualization Sean Christopherson
2019-07-27 5:51 ` [RFC PATCH 01/21] x86/sgx: Add defines for SGX device minor numbers Sean Christopherson
2019-07-27 5:51 ` Sean Christopherson [this message]
2019-07-27 5:51 ` [RFC PATCH 03/21] x86/sgx: Move provisioning device to common code Sean Christopherson
2019-07-27 5:51 ` [RFC PATCH 04/21] x86/sgx: Add /dev/sgx/virt_epc device to allocate "raw" EPC for VMs Sean Christopherson
2019-07-27 17:44 ` Andy Lutomirski
2019-07-29 17:05 ` Sean Christopherson
2019-07-27 5:51 ` [RFC PATCH 05/21] x86/sgx: Expose SGX architectural definitions to the kernel Sean Christopherson
2019-07-27 5:51 ` [RFC PATCH 06/21] KVM: x86: Add SGX sub-features leaf to reverse CPUID table Sean Christopherson
2019-07-27 5:52 ` [RFC PATCH 07/21] KVM: x86: Add WARN_ON_ONCE(index!=0) in __do_cpuid_ent Sean Christopherson
2019-07-27 5:52 ` [RFC PATCH 08/21] KVM: x86: Add kvm_x86_ops hook to short circuit emulation Sean Christopherson
2019-07-27 17:38 ` Andy Lutomirski
2019-07-30 2:49 ` Sean Christopherson
2019-08-16 0:47 ` Andy Lutomirski
2019-08-19 22:01 ` Sean Christopherson
2019-08-20 1:34 ` Andy Lutomirski
2019-08-20 1:41 ` Sean Christopherson
2019-07-30 3:08 ` Sean Christopherson
2019-07-27 5:52 ` [RFC PATCH 09/21] KVM: VMX: Add basic handling of VM-Exit from SGX enclave Sean Christopherson
2019-07-27 5:52 ` [RFC PATCH 10/21] KVM: x86: Export kvm_mmu_gva_to_gpa_{read,write}() for VMX/SGX Sean Christopherson
2019-07-27 5:52 ` [RFC PATCH 11/21] KVM: x86: Export kvm_propagate_fault (as kvm_propagate_page_fault) Sean Christopherson
2019-07-27 5:52 ` [RFC PATCH 12/21] KVM: x86: Define new #PF SGX error code bit Sean Christopherson
2019-07-27 5:52 ` [RFC PATCH 13/21] x86/sgx: Move the intermediate EINIT helper into the driver Sean Christopherson
2019-07-27 5:52 ` [RFC PATCH 14/21] x86/sgx: Add helpers to expose ECREATE and EINIT to KVM Sean Christopherson
2019-07-27 5:52 ` [RFC PATCH 15/21] KVM: VMX: Add SGX ENCLS[ECREATE] handler to enforce CPUID restrictions Sean Christopherson
2019-07-27 5:52 ` [RFC PATCH 16/21] KVM: VMX: Edd emulation of SGX Launch Control LE hash MSRs Sean Christopherson
2019-07-27 5:52 ` [RFC PATCH 17/21] KVM: VMX: Add handler for ENCLS[EINIT] to support SGX Launch Control Sean Christopherson
2019-07-27 5:52 ` [RFC PATCH 18/21] KVM: x86: Invoke kvm_x86_ops->cpuid_update() after kvm_update_cpuid() Sean Christopherson
2019-07-27 5:52 ` [RFC PATCH 19/21] KVM: VMX: Enable SGX virtualization for SGX1, SGX2 and LC Sean Christopherson
2019-07-27 5:52 ` [RFC PATCH 20/21] x86/sgx: Export sgx_set_attribute() for use by KVM Sean Christopherson
2019-07-27 5:52 ` [RFC PATCH 21/21] KVM: x86: Add capability to grant VM access to privileged SGX attribute Sean Christopherson
2019-07-27 17:32 ` Andy Lutomirski
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