[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [PATCH 2/9] vpci: Add hooks for PCI device assign/de-assign
From: Oleksandr Andrushchenko <oleksandr_andrushchenko@xxxxxxxx> When a PCI device gets assigned/de-assigned some work on vPCI side needs to be done for that device. Introduce a pair of hooks so vPCI can handle that. Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@xxxxxxxx> --- xen/drivers/passthrough/pci.c | 9 +++++++++ xen/drivers/vpci/vpci.c | 21 +++++++++++++++++++++ xen/include/xen/vpci.h | 16 ++++++++++++++++ 3 files changed, 46 insertions(+) diff --git a/xen/drivers/passthrough/pci.c b/xen/drivers/passthrough/pci.c index 25304dbe9956..deef986acbb4 100644 --- a/xen/drivers/passthrough/pci.c +++ b/xen/drivers/passthrough/pci.c @@ -864,6 +864,10 @@ static int deassign_device(struct domain *d, uint16_t seg, uint8_t bus, if ( ret ) goto out; + ret = vpci_deassign_device(d, pdev); + if ( ret ) + goto out; + if ( pdev->domain == hardware_domain ) pdev->quarantine = false; @@ -1425,6 +1429,11 @@ static int assign_device(struct domain *d, u16 seg, u8 bus, u8 devfn, u32 flag) rc = hd->platform_ops->assign_device(d, devfn, pci_to_dev(pdev), flag); } + if ( rc ) + goto done; + + rc = vpci_assign_device(d, pdev); + done: if ( rc ) printk(XENLOG_G_WARNING "%pd: assign (%pp) failed (%d)\n", diff --git a/xen/drivers/vpci/vpci.c b/xen/drivers/vpci/vpci.c index b05530f2a6b0..ee0ad63a3c12 100644 --- a/xen/drivers/vpci/vpci.c +++ b/xen/drivers/vpci/vpci.c @@ -86,6 +86,27 @@ int __hwdom_init vpci_add_handlers(struct pci_dev *pdev) return rc; } + +/* Notify vPCI that device is assigned to guest. */ +int vpci_assign_device(struct domain *d, struct pci_dev *dev) +{ + /* It only makes sense to assign for hwdom or guest domain. */ + if ( !has_vpci(d) || (d->domain_id >= DOMID_FIRST_RESERVED) ) + return 0; + + return 0; +} + +/* Notify vPCI that device is de-assigned from guest. */ +int vpci_deassign_device(struct domain *d, struct pci_dev *dev) +{ + /* It only makes sense to de-assign from hwdom or guest domain. */ + if ( !has_vpci(d) || (d->domain_id >= DOMID_FIRST_RESERVED) ) + return 0; + + return 0; +} + #endif /* __XEN__ */ static int vpci_register_cmp(const struct vpci_register *r1, diff --git a/xen/include/xen/vpci.h b/xen/include/xen/vpci.h index b861f438cc78..e7a1a09ab4c9 100644 --- a/xen/include/xen/vpci.h +++ b/xen/include/xen/vpci.h @@ -26,6 +26,12 @@ typedef int vpci_register_init_t(struct pci_dev *dev); /* Add vPCI handlers to device. */ int __must_check vpci_add_handlers(struct pci_dev *dev); +/* Notify vPCI that device is assigned to guest. */ +int __must_check vpci_assign_device(struct domain *d, struct pci_dev *dev); + +/* Notify vPCI that device is de-assigned from guest. */ +int __must_check vpci_deassign_device(struct domain *d, struct pci_dev *dev); + /* Remove all handlers and free vpci related structures. */ void vpci_remove_device(struct pci_dev *pdev); /* Remove all handlers for the device given. */ @@ -220,6 +226,16 @@ static inline int vpci_add_handlers(struct pci_dev *pdev) return 0; } +static inline int vpci_assign_device(struct domain *d, struct pci_dev *dev) +{ + return 0; +}; + +static inline int vpci_deassign_device(struct domain *d, struct pci_dev *dev) +{ + return 0; +}; + static inline void vpci_dump_msi(void) { } static inline uint32_t vpci_read(pci_sbdf_t sbdf, unsigned int reg, -- 2.25.1
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