1e7552ff5c
We use the capability chains of the VFIO_DEVICE_GET_INFO ioctl to retrieve the CLP information that the kernel exports. To be compatible with previous kernel versions we fall back on previous predefined values, same as the emulation values, when the ioctl is found to not support capability chains. If individual CLP capabilities are not found, we fall back on default values for only those capabilities missing from the chain. This patch is based on work previously done by Pierre Morel. Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> [aw: non-Linux build fixes] Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
39 lines
1.2 KiB
C
39 lines
1.2 KiB
C
/*
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* s390 vfio-pci interfaces
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*
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* Copyright 2020 IBM Corp.
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* Author(s): Matthew Rosato <mjrosato@linux.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or (at
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* your option) any later version. See the COPYING file in the top-level
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* directory.
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*/
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#ifndef HW_S390_PCI_VFIO_H
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#define HW_S390_PCI_VFIO_H
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#include "hw/s390x/s390-pci-bus.h"
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#ifdef CONFIG_LINUX
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bool s390_pci_update_dma_avail(int fd, unsigned int *avail);
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S390PCIDMACount *s390_pci_start_dma_count(S390pciState *s,
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S390PCIBusDevice *pbdev);
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void s390_pci_end_dma_count(S390pciState *s, S390PCIDMACount *cnt);
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void s390_pci_get_clp_info(S390PCIBusDevice *pbdev);
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#else
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static inline bool s390_pci_update_dma_avail(int fd, unsigned int *avail)
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{
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return false;
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}
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static inline S390PCIDMACount *s390_pci_start_dma_count(S390pciState *s,
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S390PCIBusDevice *pbdev)
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{
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return NULL;
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}
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static inline void s390_pci_end_dma_count(S390pciState *s,
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S390PCIDMACount *cnt) { }
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static inline void s390_pci_get_clp_info(S390PCIBusDevice *pbdev) { }
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#endif
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#endif
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