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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [PATCH v3 2/3] xen/pci: Move x86 specific code to x86 directory.
On Mon, 16 Nov 2020, Rahul Singh wrote:
> passthrough/pci.c file is common for all architecture, but there is x86
> specific code in this file.
>
> Move x86 specific code to the drivers/passthrough/io.c file to avoid
> compilation error for other architecture.
>
> As drivers/passthrough/io.c is compiled only for x86 move it to
> x86 directory and rename it to hvm.c.
>
> No functional change.
>
> Signed-off-by: Rahul Singh <rahul.singh@xxxxxxx>
This patch breaks the x86 build if you disable CONFIG_HVM:
prelink-efi.o: In function `pci_release_devices':
/local/repos/xen-upstream/xen/drivers/passthrough/pci.c:900: undefined
reference to `arch_pci_clean_pirqs'
Makefile:209: recipe for target '/local/repos/xen-upstream/xen/xen.efi' failed
> ---
>
> Changes in v3:
> - fixed typo
> - As per suggestion move the code to the file io.c and move that file to
> x86 directory and rename it hvm.c
>
> ---
> xen/drivers/passthrough/Makefile | 3 -
> xen/drivers/passthrough/pci.c | 78 +--------------------
> xen/drivers/passthrough/x86/Makefile | 1 +
> xen/drivers/passthrough/{io.c => x86/hvm.c} | 66 +++++++++++++++++
> xen/drivers/passthrough/x86/iommu.c | 7 ++
> xen/include/xen/pci.h | 2 +
> 6 files changed, 77 insertions(+), 80 deletions(-)
> rename xen/drivers/passthrough/{io.c => x86/hvm.c} (95%)
>
> diff --git a/xen/drivers/passthrough/Makefile
> b/xen/drivers/passthrough/Makefile
> index e973e16c74..cc646612c7 100644
> --- a/xen/drivers/passthrough/Makefile
> +++ b/xen/drivers/passthrough/Makefile
> @@ -6,6 +6,3 @@ obj-$(CONFIG_ARM) += arm/
> obj-y += iommu.o
> obj-$(CONFIG_HAS_PCI) += pci.o
> obj-$(CONFIG_HAS_DEVICE_TREE) += device_tree.o
> -
> -x86-$(CONFIG_HVM) := io.o
> -obj-$(CONFIG_X86) += $(x86-y)
> diff --git a/xen/drivers/passthrough/pci.c b/xen/drivers/passthrough/pci.c
> index 51e584127e..e8a28df126 100644
> --- a/xen/drivers/passthrough/pci.c
> +++ b/xen/drivers/passthrough/pci.c
> @@ -14,9 +14,6 @@
> * this program; If not, see <http://www.gnu.org/licenses/>.
> */
>
> -#include <xen/sched.h>
> -#include <xen/pci.h>
> -#include <xen/pci_regs.h>
> #include <xen/pci_ids.h>
> #include <xen/list.h>
> #include <xen/prefetch.h>
> @@ -24,7 +21,6 @@
> #include <xen/irq.h>
> #include <xen/param.h>
> #include <xen/vm_event.h>
> -#include <asm/hvm/irq.h>
> #include <xen/delay.h>
> #include <xen/keyhandler.h>
> #include <xen/event.h>
> @@ -842,71 +838,6 @@ int pci_remove_device(u16 seg, u8 bus, u8 devfn)
> return ret;
> }
>
> -static int pci_clean_dpci_irq(struct domain *d,
> - struct hvm_pirq_dpci *pirq_dpci, void *arg)
> -{
> - struct dev_intx_gsi_link *digl, *tmp;
> -
> - pirq_guest_unbind(d, dpci_pirq(pirq_dpci));
> -
> - if ( pt_irq_need_timer(pirq_dpci->flags) )
> - kill_timer(&pirq_dpci->timer);
> -
> - list_for_each_entry_safe ( digl, tmp, &pirq_dpci->digl_list, list )
> - {
> - list_del(&digl->list);
> - xfree(digl);
> - }
> -
> - radix_tree_delete(&d->pirq_tree, dpci_pirq(pirq_dpci)->pirq);
> -
> - if ( !pt_pirq_softirq_active(pirq_dpci) )
> - return 0;
> -
> - domain_get_irq_dpci(d)->pending_pirq_dpci = pirq_dpci;
> -
> - return -ERESTART;
> -}
> -
> -static int pci_clean_dpci_irqs(struct domain *d)
> -{
> - struct hvm_irq_dpci *hvm_irq_dpci = NULL;
> -
> - if ( !is_iommu_enabled(d) )
> - return 0;
> -
> - if ( !is_hvm_domain(d) )
> - return 0;
> -
> - spin_lock(&d->event_lock);
> - hvm_irq_dpci = domain_get_irq_dpci(d);
> - if ( hvm_irq_dpci != NULL )
> - {
> - int ret = 0;
> -
> - if ( hvm_irq_dpci->pending_pirq_dpci )
> - {
> - if ( pt_pirq_softirq_active(hvm_irq_dpci->pending_pirq_dpci) )
> - ret = -ERESTART;
> - else
> - hvm_irq_dpci->pending_pirq_dpci = NULL;
> - }
> -
> - if ( !ret )
> - ret = pt_pirq_iterate(d, pci_clean_dpci_irq, NULL);
> - if ( ret )
> - {
> - spin_unlock(&d->event_lock);
> - return ret;
> - }
> -
> - hvm_domain_irq(d)->dpci = NULL;
> - free_hvm_irq_dpci(hvm_irq_dpci);
> - }
> - spin_unlock(&d->event_lock);
> - return 0;
> -}
> -
> /* Caller should hold the pcidevs_lock */
> static int deassign_device(struct domain *d, uint16_t seg, uint8_t bus,
> uint8_t devfn)
> @@ -966,7 +897,7 @@ int pci_release_devices(struct domain *d)
> int ret;
>
> pcidevs_lock();
> - ret = pci_clean_dpci_irqs(d);
> + ret = arch_pci_clean_pirqs(d);
> if ( ret )
> {
> pcidevs_unlock();
> @@ -1370,13 +1301,6 @@ static int __init setup_dump_pcidevs(void)
> }
> __initcall(setup_dump_pcidevs);
>
> -int iommu_update_ire_from_msi(
> - struct msi_desc *msi_desc, struct msi_msg *msg)
> -{
> - return iommu_intremap
> - ? iommu_call(&iommu_ops, update_ire_from_msi, msi_desc, msg) : 0;
> -}
> -
> static int iommu_add_device(struct pci_dev *pdev)
> {
> const struct domain_iommu *hd;
> diff --git a/xen/drivers/passthrough/x86/Makefile
> b/xen/drivers/passthrough/x86/Makefile
> index a70cf9460d..69284a5d19 100644
> --- a/xen/drivers/passthrough/x86/Makefile
> +++ b/xen/drivers/passthrough/x86/Makefile
> @@ -1,2 +1,3 @@
> obj-y += ats.o
> obj-y += iommu.o
> +obj-$(CONFIG_HVM) += hvm.o
> diff --git a/xen/drivers/passthrough/io.c b/xen/drivers/passthrough/x86/hvm.c
> similarity index 95%
> rename from xen/drivers/passthrough/io.c
> rename to xen/drivers/passthrough/x86/hvm.c
> index 6b1305a3e5..41cfa2e200 100644
> --- a/xen/drivers/passthrough/io.c
> +++ b/xen/drivers/passthrough/x86/hvm.c
> @@ -1036,6 +1036,72 @@ unlock:
> spin_unlock(&d->event_lock);
> }
>
> +static int pci_clean_dpci_irq(struct domain *d,
> + struct hvm_pirq_dpci *pirq_dpci, void *arg)
> +{
> + struct dev_intx_gsi_link *digl, *tmp;
> +
> + pirq_guest_unbind(d, dpci_pirq(pirq_dpci));
> +
> + if ( pt_irq_need_timer(pirq_dpci->flags) )
> + kill_timer(&pirq_dpci->timer);
> +
> + list_for_each_entry_safe ( digl, tmp, &pirq_dpci->digl_list, list )
> + {
> + list_del(&digl->list);
> + xfree(digl);
> + }
> +
> + radix_tree_delete(&d->pirq_tree, dpci_pirq(pirq_dpci)->pirq);
> +
> + if ( !pt_pirq_softirq_active(pirq_dpci) )
> + return 0;
> +
> + domain_get_irq_dpci(d)->pending_pirq_dpci = pirq_dpci;
> +
> + return -ERESTART;
> +}
> +
> +int arch_pci_clean_pirqs(struct domain *d)
> +{
> + struct hvm_irq_dpci *hvm_irq_dpci = NULL;
> +
> + if ( !is_iommu_enabled(d) )
> + return 0;
> +
> + if ( !is_hvm_domain(d) )
> + return 0;
> +
> + spin_lock(&d->event_lock);
> + hvm_irq_dpci = domain_get_irq_dpci(d);
> + if ( hvm_irq_dpci != NULL )
> + {
> + int ret = 0;
> +
> + if ( hvm_irq_dpci->pending_pirq_dpci )
> + {
> + if ( pt_pirq_softirq_active(hvm_irq_dpci->pending_pirq_dpci) )
> + ret = -ERESTART;
> + else
> + hvm_irq_dpci->pending_pirq_dpci = NULL;
> + }
> +
> + if ( !ret )
> + ret = pt_pirq_iterate(d, pci_clean_dpci_irq, NULL);
> + if ( ret )
> + {
> + spin_unlock(&d->event_lock);
> + return ret;
> + }
> +
> + hvm_domain_irq(d)->dpci = NULL;
> + free_hvm_irq_dpci(hvm_irq_dpci);
> + }
> + spin_unlock(&d->event_lock);
> +
> + return 0;
> +}
> +
> /*
> * Note: 'pt_pirq_softirq_reset' can clear the STATE_SCHED before we get to
> * doing it. If that is the case we let 'pt_pirq_softirq_reset' do
> ref-counting.
> diff --git a/xen/drivers/passthrough/x86/iommu.c
> b/xen/drivers/passthrough/x86/iommu.c
> index f17b1820f4..875e67b53b 100644
> --- a/xen/drivers/passthrough/x86/iommu.c
> +++ b/xen/drivers/passthrough/x86/iommu.c
> @@ -308,6 +308,13 @@ struct page_info *iommu_alloc_pgtable(struct domain *d)
> return pg;
> }
>
> +int iommu_update_ire_from_msi(
> + struct msi_desc *msi_desc, struct msi_msg *msg)
> +{
> + return iommu_intremap
> + ? iommu_call(&iommu_ops, update_ire_from_msi, msi_desc, msg) : 0;
> +}
> +
> /*
> * Local variables:
> * mode: C
> diff --git a/xen/include/xen/pci.h b/xen/include/xen/pci.h
> index 20a54a5bb4..78d83afe64 100644
> --- a/xen/include/xen/pci.h
> +++ b/xen/include/xen/pci.h
> @@ -208,4 +208,6 @@ int msixtbl_pt_register(struct domain *, struct pirq *,
> uint64_t gtable);
> void msixtbl_pt_unregister(struct domain *, struct pirq *);
> void msixtbl_pt_cleanup(struct domain *d);
>
> +int arch_pci_clean_pirqs(struct domain *d);
> +
> #endif /* __XEN_PCI_H__ */
> --
> 2.17.1
>
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