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https://git.rwth-aachen.de/acs/public/villas/node/
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pci: port to C++
This commit is contained in:
parent
2c0e96797d
commit
8421332706
4 changed files with 322 additions and 278 deletions
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@ -1,92 +0,0 @@
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/** Linux PCI helpers
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*
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* @file
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* @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
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* @copyright 2014-2020, Institute for Automation of Complex Power Systems, EONERC
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* @license GNU General Public License (version 3)
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*
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* VILLAScommon
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*********************************************************************************/
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/** @addtogroup fpga Kernel @{ */
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#pragma once
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#include <cstddef>
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#include <cstdint>
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#include <villas/list.h>
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#define PCI_SLOT(devfn) (((devfn) >> 3) & 0x1f)
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#define PCI_FUNC(devfn) ((devfn) & 0x07)
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struct pci_device {
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struct {
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int vendor;
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int device;
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int class_code;
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} id;
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struct {
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int domain;
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int bus;
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int device;
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int function;
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} slot; /**< Bus, Device, Function (BDF) */
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};
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struct pci_region {
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int num;
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uintptr_t start;
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uintptr_t end;
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unsigned long long flags;
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};
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struct pci {
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struct vlist devices; /**< List of available PCI devices in the system (struct pci_device) */
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};
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/** Initialize Linux PCI handle.
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*
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* This search for all available PCI devices under /sys/bus/pci
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*
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* @retval 0 Success. Everything went well.
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* @retval <0 Error. Something went wrong.
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*/
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int pci_init(struct pci *p);
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/** Destroy handle. */
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int pci_destroy(struct pci *p);
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int pci_device_parse_slot(struct pci_device *f, const char *str, const char **error);
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int pci_device_parse_id(struct pci_device *f, const char *str, const char **error);
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int pci_device_compare(const struct pci_device *d, const struct pci_device *f);
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struct pci_device * pci_lookup_device(struct pci *p, struct pci_device *filter);
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/** Get currently loaded driver for device */
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int pci_get_driver(const struct pci_device *d, char *buf, size_t buflen);
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/** Bind a new LKM to the PCI device */
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int pci_attach_driver(const struct pci_device *d, const char *driver);
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/** Return the IOMMU group of this PCI device or -1 if the device is not in a group. */
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int pci_get_iommu_group(const struct pci_device *d);
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size_t pci_get_regions(const struct pci_device *d, struct pci_region** regions);
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/** @} */
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140
common/include/villas/kernel/pci.hpp
Normal file
140
common/include/villas/kernel/pci.hpp
Normal file
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@ -0,0 +1,140 @@
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/** Linux PCI helpers
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*
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* @file
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* @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
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* @copyright 2014-2020, Institute for Automation of Complex Power Systems, EONERC
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* @license GNU General Public License (version 3)
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*
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* VILLAScommon
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*********************************************************************************/
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/** @addtogroup fpga Kernel @{ */
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#pragma once
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#include <cstddef>
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#include <cstdint>
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#include <list>
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namespace villas {
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namespace kernel {
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namespace pci {
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#define PCI_SLOT(devfn) (((devfn) >> 3) & 0x1f)
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#define PCI_FUNC(devfn) ((devfn) & 0x07)
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class Id {
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public:
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Id(const std::string &str);
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Id(int vid = 0, int did = 0, int cc = 0) :
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vendor(vid),
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device(did),
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class_code(cc)
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{ }
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bool
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operator==(const Id &i);
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int vendor;
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int device;
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int class_code;
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};
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class Slot {
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public:
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Slot(const std::string &str);
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Slot(int dom = 0, int b = 0, int dev = 0, int fcn = 0) :
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domain(dom),
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bus(b),
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device(dev),
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function(fcn)
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{ }
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bool
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operator==(const Slot &s);
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int domain;
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int bus;
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int device;
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int function;
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};
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struct Region {
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int num;
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uintptr_t start;
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uintptr_t end;
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unsigned long long flags;
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};
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class Device {
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public:
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Device(Id i, Slot s) :
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id(i),
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slot(s)
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{ }
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bool
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operator==(const Device &other);
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bool
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operator==(const Id &other);
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bool
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operator==(const Slot &other);
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/** Get currently loaded driver for device */
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std::string
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getDriver() const;
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/** Bind a new LKM to the PCI device */
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bool
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attachDriver(const std::string &driver) const;
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/** Return the IOMMU group of this PCI device or -1 if the device is not in a group. */
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int
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getIOMMUGroup() const;
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std::list<Region>
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getRegions() const;
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Id id;
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Slot slot;
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};
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class DeviceList : public std::list<Device> {
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public:
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/** Initialize Linux PCI handle.
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*
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* This search for all available PCI devices under /sys/bus/pci
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*/
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DeviceList();
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Device &
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lookupDevice(const Slot &slot);
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Device &
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lookupDevice(const Id &id);
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};
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} /* namespace pci */
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} /* namespace kernel */
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} /* namespace villas */
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/** @} */
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@ -30,12 +30,11 @@
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#include <villas/utils.hpp>
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#include <villas/exceptions.hpp>
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#include <villas/config.h>
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#include <villas/kernel/pci.h>
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#include <villas/kernel/pci.hpp>
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using namespace villas;
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using namespace villas::utils;
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using namespace villas::kernel::pci;
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int pci_init(struct pci *p)
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DeviceList::DeviceList()
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{
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struct dirent *e;
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DIR *dp;
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@ -43,15 +42,11 @@ int pci_init(struct pci *p)
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char path[PATH_MAX];
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int ret;
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vlist_init(&p->devices);
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snprintf(path, sizeof(path), "%s/bus/pci/devices", SYSFS_PATH);
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dp = opendir(path);
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if (dp == nullptr) {
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serror("Failed to detect PCI devices");
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return -1;
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}
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if (!dp)
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throw SystemError("Failed to detect PCI devices");
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while ((e = readdir(dp))) {
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/* Ignore special entries */
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@ -59,15 +54,12 @@ int pci_init(struct pci *p)
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(strcmp(e->d_name, "..") == 0) )
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continue;
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struct pci_device *d = new struct pci_device;
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if (!d)
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throw RuntimeError("Failed to allocate memory!");
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memset(d, 0, sizeof(struct pci_device));
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Id id;
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Slot slot;
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struct { const char *s; int *p; } map[] = {
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{ "vendor", &d->id.vendor },
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{ "device", &d->id.device }
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{ "vendor", &id.vendor },
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{ "device", &id.device }
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};
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/* Read vendor & device id */
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@ -76,7 +68,7 @@ int pci_init(struct pci *p)
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f = fopen(path, "r");
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if (!f)
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serror("Failed to open '%s'", path);
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throw SystemError("Failed to open '{}'", path);
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ret = fscanf(f, "%x", map[i].p);
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if (ret != 1)
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@ -86,63 +78,138 @@ int pci_init(struct pci *p)
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}
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/* Get slot id */
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ret = sscanf(e->d_name, "%4x:%2x:%2x.%u", &d->slot.domain, &d->slot.bus, &d->slot.device, &d->slot.function);
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ret = sscanf(e->d_name, "%4x:%2x:%2x.%u", &slot.domain, &slot.bus, &slot.device, &slot.function);
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if (ret != 4)
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error("Failed to parse PCI slot number: %s", e->d_name);
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vlist_push(&p->devices, d);
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emplace_back(id, slot);
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}
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closedir(dp);
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return 0;
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}
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int pci_destroy(struct pci *p)
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Device &
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DeviceList::lookupDevice(const Slot &s)
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{
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vlist_destroy(&p->devices, nullptr, true);
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return 0;
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return *std::find(begin(), end(), s);
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}
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int pci_device_parse_slot(struct pci_device *f, const char *s, const char **error)
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Device &
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DeviceList::lookupDevice(const Id &i)
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{
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char *str = strdup(s);
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char *colon = strrchr(str, ':');
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char *dot = strchr((colon ? colon + 1 : str), '.');
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char *mid = str;
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char *e, *bus, *colon2;
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return *std::find(begin(), end(), i);
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}
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Id::Id(const std::string &str) :
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vendor(0),
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device(0),
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class_code(0)
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{
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char *s, *c, *e;
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char *tmp = strdup(str.c_str());
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if (!*tmp)
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return;
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s = strchr(tmp, ':');
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if (!s) {
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free(tmp);
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throw RuntimeError("Failed to parse PCI id: ':' expected", str);
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}
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*s++ = 0;
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if (tmp[0] && strcmp(tmp, "*")) {
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long int x = strtol(tmp, &e, 16);
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if ((e && *e) || (x < 0 || x > 0xffff)) {
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free(tmp);
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throw RuntimeError("Failed to parse PCI id: {}: Invalid vendor id", str);
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}
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vendor = x;
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}
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c = strchr(s, ':');
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if (c)
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*c++ = 0;
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if (s[0] && strcmp(s, "*")) {
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long int x = strtol(s, &e, 16);
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if ((e && *e) || (x < 0 || x > 0xffff)) {
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free(tmp);
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throw RuntimeError("Failed to parse PCI id: {}: Invalid device id", str);
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}
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device = x;
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}
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if (c && c[0] && strcmp(s, "*")) {
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long int x = strtol(c, &e, 16);
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if ((e && *e) || (x < 0 || x > 0xffff)) {
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free(tmp);
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throw RuntimeError("Failed to parse PCI id: {}: Invalid class code", str);
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}
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class_code = x;
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}
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}
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bool
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Id::operator==(const Id &i)
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{
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if ((i.device != 0 && i.device != device) ||
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(i.vendor != 0 && i.vendor != vendor))
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return false;
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if ((i.class_code != 0) || (i.class_code != class_code))
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return false;
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return true;
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}
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Slot::Slot(const std::string &str) :
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domain(0),
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bus(0),
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device(0),
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function(0)
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{
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char *tmp = strdup(str.c_str());
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char *colon = strrchr(tmp, ':');
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char *dot = strchr((colon ? colon + 1 : tmp), '.');
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char *mid = tmp;
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char *e, *buss, *colon2;
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if (colon) {
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*colon++ = 0;
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mid = colon;
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colon2 = strchr(str, ':');
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colon2 = strchr(tmp, ':');
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if (colon2) {
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*colon2++ = 0;
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bus = colon2;
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buss = colon2;
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if (str[0] && strcmp(str, "*")) {
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long int x = strtol(str, &e, 16);
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if (tmp[0] && strcmp(tmp, "*")) {
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long int x = strtol(tmp, &e, 16);
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if ((e && *e) || (x < 0 || x > 0x7fffffff)) {
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*error = "Invalid domain number";
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goto fail;
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free(tmp);
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throw RuntimeError("Failed to parse PCI slot: {}: invalid domain", str);
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}
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f->slot.domain = x;
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domain = x;
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}
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}
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else
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bus = str;
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buss = tmp;
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if (bus[0] && strcmp(bus, "*")) {
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long int x = strtol(bus, &e, 16);
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if (buss[0] && strcmp(buss, "*")) {
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long int x = strtol(buss, &e, 16);
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if ((e && *e) || (x < 0 || x > 0xff)) {
|
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*error = "Invalid bus number";
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goto fail;
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free(tmp);
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throw RuntimeError("Failed to parse PCI slot: {}: invalid bus", str);
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}
|
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|
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f->slot.bus = x;
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bus = x;
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}
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}
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|
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@ -153,146 +220,87 @@ int pci_device_parse_slot(struct pci_device *f, const char *s, const char **erro
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long int x = strtol(mid, &e, 16);
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if ((e && *e) || (x < 0 || x > 0x1f)) {
|
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*error = "Invalid slot number";
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goto fail;
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free(tmp);
|
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throw RuntimeError("Failed to parse PCI slot: {}: invalid slot", str);
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}
|
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|
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f->slot.device = x;
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device = x;
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}
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|
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if (dot && dot[0] && strcmp(dot, "*")) {
|
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long int x = strtol(dot, &e, 16);
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|
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if ((e && *e) || (x < 0 || x > 7)) {
|
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*error = "Invalid function number";
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goto fail;
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free(tmp);
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throw RuntimeError("Failed to parse PCI slot: {}: invalid function", str);
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}
|
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|
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f->slot.function = x;
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function = x;
|
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}
|
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|
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free(str);
|
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return 0;
|
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|
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fail:
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free(str);
|
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return -1;
|
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free(tmp);
|
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}
|
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|
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/* ID filter syntax: [vendor]:[device][:class] */
|
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int pci_device_parse_id(struct pci_device *f, const char *str, const char **error)
|
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bool
|
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Slot::operator==(const Slot &s)
|
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{
|
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char *s, *c, *e;
|
||||
char *tmp = strdup(str);
|
||||
if ((s.domain != 0 && s.domain != domain) ||
|
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(s.bus != 0 && s.bus != bus) ||
|
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(s.device != 0 && s.device != device) ||
|
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(s.function != 0 && s.function != function))
|
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return false;
|
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|
||||
if (!*tmp)
|
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return 0;
|
||||
|
||||
s = strchr(tmp, ':');
|
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if (!s) {
|
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*error = "':' expected";
|
||||
goto fail;
|
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}
|
||||
|
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*s++ = 0;
|
||||
if (tmp[0] && strcmp(tmp, "*")) {
|
||||
long int x = strtol(tmp, &e, 16);
|
||||
|
||||
if ((e && *e) || (x < 0 || x > 0xffff)) {
|
||||
*error = "Invalid vendor ID";
|
||||
goto fail;
|
||||
}
|
||||
|
||||
f->id.vendor = x;
|
||||
}
|
||||
|
||||
c = strchr(s, ':');
|
||||
if (c)
|
||||
*c++ = 0;
|
||||
|
||||
if (s[0] && strcmp(s, "*")) {
|
||||
long int x = strtol(s, &e, 16);
|
||||
if ((e && *e) || (x < 0 || x > 0xffff)) {
|
||||
*error = "Invalid device ID";
|
||||
goto fail;
|
||||
}
|
||||
|
||||
f->id.device = x;
|
||||
}
|
||||
|
||||
if (c && c[0] && strcmp(s, "*")) {
|
||||
long int x = strtol(c, &e, 16);
|
||||
|
||||
if ((e && *e) || (x < 0 || x > 0xffff)) {
|
||||
*error = "Invalid class code";
|
||||
goto fail;
|
||||
}
|
||||
|
||||
f->id.class_code = x;
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
fail: free(tmp);
|
||||
return -1;
|
||||
return true;
|
||||
}
|
||||
|
||||
int pci_device_compare(const struct pci_device *d, const struct pci_device *f)
|
||||
bool
|
||||
Device::operator==(const Device &f)
|
||||
{
|
||||
if ((f->slot.domain != 0 && f->slot.domain != d->slot.domain) ||
|
||||
(f->slot.bus != 0 && f->slot.bus != d->slot.bus) ||
|
||||
(f->slot.device != 0 && f->slot.device != d->slot.device) ||
|
||||
(f->slot.function != 0 && f->slot.function != d->slot.function))
|
||||
return 1;
|
||||
|
||||
if ((f->id.device != 0 && f->id.device != d->id.device) ||
|
||||
(f->id.vendor != 0 && f->id.vendor != d->id.vendor))
|
||||
return 1;
|
||||
|
||||
if ((f->id.class_code != 0) || (f->id.class_code != d->id.class_code))
|
||||
return 1;
|
||||
|
||||
return 0; /* found */
|
||||
return id == f.id && slot == f.slot;
|
||||
}
|
||||
|
||||
struct pci_device * pci_lookup_device(struct pci *p, struct pci_device *f)
|
||||
bool
|
||||
Device::operator==(const Slot &s)
|
||||
{
|
||||
return (struct pci_device *) vlist_search(&p->devices, (cmp_cb_t) pci_device_compare, (void *) f);
|
||||
return slot == s;
|
||||
}
|
||||
|
||||
size_t pci_get_regions(const struct pci_device *d, struct pci_region** regions)
|
||||
bool
|
||||
Device::operator==(const Id &i)
|
||||
{
|
||||
return id == i;
|
||||
}
|
||||
|
||||
std::list<Region>
|
||||
Device::getRegions() const
|
||||
{
|
||||
FILE* f;
|
||||
char sysfs[1024];
|
||||
|
||||
assert(regions != nullptr);
|
||||
|
||||
snprintf(sysfs, sizeof(sysfs), "%s/bus/pci/devices/%04x:%02x:%02x.%x/resource",
|
||||
SYSFS_PATH, d->slot.domain, d->slot.bus, d->slot.device, d->slot.function);
|
||||
SYSFS_PATH, slot.domain, slot.bus, slot.device, slot.function);
|
||||
|
||||
f = fopen(sysfs, "r");
|
||||
if (!f)
|
||||
serror("Failed to open resource mapping %s", sysfs);
|
||||
throw SystemError("Failed to open resource mapping {}", sysfs);
|
||||
|
||||
struct pci_region _regions[8];
|
||||
struct pci_region* cur_region = _regions;
|
||||
size_t valid_regions = 0;
|
||||
std::list<Region> regions;
|
||||
|
||||
ssize_t bytesRead;
|
||||
char* line = nullptr;
|
||||
size_t len = 0;
|
||||
|
||||
int region = 0;
|
||||
int reg_num = 0;
|
||||
|
||||
/* Cap to 8 regions, just because we don't know how many may exist. */
|
||||
while (region < 8 && (bytesRead = getline(&line, &len, f)) != -1) {
|
||||
while (reg_num < 8 && (bytesRead = getline(&line, &len, f)) != -1) {
|
||||
unsigned long long tokens[3];
|
||||
char* s = line;
|
||||
for (int i = 0; i < 3; i++) {
|
||||
char* end;
|
||||
tokens[i] = strtoull(s, &end, 16);
|
||||
if (s == end) {
|
||||
printf("Error parsing line %d of %s\n", region + 1, sysfs);
|
||||
printf("Error parsing line %d of %s\n", reg_num + 1, sysfs);
|
||||
tokens[0] = tokens[1] = 0; /* Mark invalid */
|
||||
break;
|
||||
}
|
||||
|
|
@ -305,86 +313,79 @@ size_t pci_get_regions(const struct pci_device *d, struct pci_region** regions)
|
|||
line = nullptr;
|
||||
len = 0;
|
||||
|
||||
if (tokens[0] != tokens[1]) {
|
||||
/* This is a valid region */
|
||||
cur_region->num = region;
|
||||
cur_region->start = tokens[0];
|
||||
cur_region->end = tokens[1];
|
||||
cur_region->flags = tokens[2];
|
||||
cur_region++;
|
||||
valid_regions++;
|
||||
if (tokens[0] != tokens[1]) { /* This is a valid region */
|
||||
Region region;
|
||||
|
||||
region.num = reg_num;
|
||||
region.start = tokens[0];
|
||||
region.end = tokens[1];
|
||||
region.flags = tokens[2];
|
||||
|
||||
regions.push_back(region);
|
||||
}
|
||||
|
||||
region++;
|
||||
reg_num++;
|
||||
}
|
||||
|
||||
if (valid_regions > 0) {
|
||||
*regions = new struct pci_region[valid_regions];
|
||||
if (!*regions)
|
||||
throw RuntimeError("Failed to allocate memory!");
|
||||
fclose(f);
|
||||
|
||||
memcpy(*regions, _regions, valid_regions * sizeof (struct pci_region));
|
||||
}
|
||||
|
||||
return valid_regions;
|
||||
return regions;
|
||||
}
|
||||
|
||||
|
||||
int pci_get_driver(const struct pci_device *d, char *buf, size_t buflen)
|
||||
std::string
|
||||
Device::getDriver() const
|
||||
{
|
||||
int ret;
|
||||
char sysfs[1024], syml[1024];
|
||||
memset(syml, 0, sizeof(syml));
|
||||
|
||||
snprintf(sysfs, sizeof(sysfs), "%s/bus/pci/devices/%04x:%02x:%02x.%x/driver", SYSFS_PATH,
|
||||
d->slot.domain, d->slot.bus, d->slot.device, d->slot.function);
|
||||
slot.domain, slot.bus, slot.device, slot.function);
|
||||
|
||||
ret = readlink(sysfs, syml, sizeof(syml));
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
throw SystemError("Failed to follow link: {}", sysfs);
|
||||
|
||||
char *driver = basename(syml);
|
||||
|
||||
strncpy(buf, driver, buflen);
|
||||
|
||||
return 0;
|
||||
return basename(syml);
|
||||
}
|
||||
|
||||
int pci_attach_driver(const struct pci_device *d, const char *driver)
|
||||
bool
|
||||
Device::attachDriver(const std::string &driver) const
|
||||
{
|
||||
FILE *f;
|
||||
char fn[1024];
|
||||
|
||||
/* Add new ID to driver */
|
||||
snprintf(fn, sizeof(fn), "%s/bus/pci/drivers/%s/new_id", SYSFS_PATH, driver);
|
||||
snprintf(fn, sizeof(fn), "%s/bus/pci/drivers/%s/new_id", SYSFS_PATH, driver.c_str());
|
||||
f = fopen(fn, "w");
|
||||
if (!f)
|
||||
serror("Failed to add PCI id to %s driver (%s)", driver, fn);
|
||||
throw SystemError("Failed to add PCI id to {} driver ({})", driver, fn);
|
||||
|
||||
info("Adding ID to %s module: %04x %04x", driver, d->id.vendor, d->id.device);
|
||||
fprintf(f, "%04x %04x", d->id.vendor, d->id.device);
|
||||
info("Adding ID to %s module: %04x %04x", driver.c_str(), id.vendor, id.device);
|
||||
fprintf(f, "%04x %04x", id.vendor, id.device);
|
||||
fclose(f);
|
||||
|
||||
/* Bind to driver */
|
||||
snprintf(fn, sizeof(fn), "%s/bus/pci/drivers/%s/bind", SYSFS_PATH, driver);
|
||||
snprintf(fn, sizeof(fn), "%s/bus/pci/drivers/%s/bind", SYSFS_PATH, driver.c_str());
|
||||
f = fopen(fn, "w");
|
||||
if (!f)
|
||||
serror("Failed to bind PCI device to %s driver (%s)", driver, fn);
|
||||
throw SystemError("Failed to bind PCI device to {} driver ({})", driver, fn);
|
||||
|
||||
info("Bind device to %s driver", driver);
|
||||
fprintf(f, "%04x:%02x:%02x.%x\n", d->slot.domain, d->slot.bus, d->slot.device, d->slot.function);
|
||||
info("Bind device to %s driver", driver.c_str());
|
||||
fprintf(f, "%04x:%02x:%02x.%x\n", slot.domain, slot.bus, slot.device, slot.function);
|
||||
fclose(f);
|
||||
|
||||
return 0;
|
||||
return true;
|
||||
}
|
||||
|
||||
int pci_get_iommu_group(const struct pci_device *d)
|
||||
int
|
||||
Device::getIOMMUGroup() const
|
||||
{
|
||||
int ret;
|
||||
char *group, link[1024], sysfs[1024];
|
||||
|
||||
snprintf(sysfs, sizeof(sysfs), "%s/bus/pci/devices/%04x:%02x:%02x.%x/iommu_group", SYSFS_PATH,
|
||||
d->slot.domain, d->slot.bus, d->slot.device, d->slot.function);
|
||||
slot.domain, slot.bus, slot.device, slot.function);
|
||||
|
||||
ret = readlink(sysfs, link, sizeof(link));
|
||||
if (ret < 0)
|
||||
|
|
|
|||
|
|
@ -45,7 +45,7 @@
|
|||
#include <linux/pci_regs.h>
|
||||
|
||||
#include <villas/log.hpp>
|
||||
#include <villas/kernel/pci.h>
|
||||
#include <villas/kernel/pci.hpp>
|
||||
#include <villas/kernel/kernel.hpp>
|
||||
#include <villas/kernel/vfio.hpp>
|
||||
|
||||
|
|
@ -305,18 +305,13 @@ VfioContainer::attachDevice(const pci_device* pdev)
|
|||
}
|
||||
|
||||
/* Bind PCI card to vfio-pci driver if not already bound */
|
||||
ret = pci_get_driver(pdev, name, sizeof(name));
|
||||
if (ret || strcmp(name, kernelDriver)) {
|
||||
if (pdev.getDriver() != kernelDriver) {
|
||||
logger->debug("Bind PCI card to kernel driver '{}'", kernelDriver);
|
||||
ret = pci_attach_driver(pdev, kernelDriver);
|
||||
if (ret) {
|
||||
logger->error("Failed to attach device to driver");
|
||||
throw std::exception();
|
||||
}
|
||||
pdev.attachDriver(kernelDriver);
|
||||
}
|
||||
|
||||
/* Get IOMMU group of device */
|
||||
int index = isIommuEnabled() ? pci_get_iommu_group(pdev) : 0;
|
||||
int index = isIommuEnabled() ? pdev.getIOMMUGroup() : 0;
|
||||
if (index < 0) {
|
||||
ret = kernel::get_cmdline_param("intel_iommu", iommu_state, sizeof(iommu_state));
|
||||
if (ret != 0 || strcmp("on", iommu_state) != 0)
|
||||
|
|
|
|||
Loading…
Add table
Reference in a new issue