From: Stefano Stabellini <sstabellini@kernel.org>
To: Rahul Singh <rahul.singh@arm.com>
Cc: xen-devel@lists.xenproject.org, bertrand.marquis@arm.com,
Andre.Przywara@arm.com,
"Stefano Stabellini" <sstabellini@kernel.org>,
"Julien Grall" <julien@xen.org>,
"Volodymyr Babchuk" <Volodymyr_Babchuk@epam.com>,
"Andrew Cooper" <andrew.cooper3@citrix.com>,
"George Dunlap" <george.dunlap@citrix.com>,
"Ian Jackson" <iwj@xenproject.org>,
"Jan Beulich" <jbeulich@suse.com>, "Wei Liu" <wl@xen.org>,
"Roger Pau Monné" <roger.pau@citrix.com>
Subject: Re: [PATCH v5 02/11] xen/arm: Add PHYSDEVOP_pci_device_(*add/remove) support for ARM
Date: Wed, 6 Oct 2021 17:05:45 -0700 (PDT) [thread overview]
Message-ID: <alpine.DEB.2.21.2110061704280.3209@sstabellini-ThinkPad-T480s> (raw)
In-Reply-To: <0dc4423b2e20c1eb40c961b211b18ed041f707b7.1633540842.git.rahul.singh@arm.com>
On Wed, 6 Oct 2021, Rahul Singh wrote:
> Hardware domain is in charge of doing the PCI enumeration and will
> discover the PCI devices and then will communicate to XEN via hyper
> call PHYSDEVOP_pci_device_add(..) to add the PCI devices in XEN.
>
> Also implement PHYSDEVOP_pci_device_remove(..) to remove the PCI device.
>
> As most of the code for PHYSDEVOP_pci_device_* is the same between x86
> and ARM, move the code to a common file to avoid duplication.
>
> There are other PHYSDEVOP_pci_device_* operations to add PCI devices.
> Currently implemented PHYSDEVOP_pci_device_remove(..) and
> PHYSDEVOP_pci_device_add(..) only as those are minimum required to
> support PCI passthrough on ARM.
>
> Signed-off-by: Rahul Singh <rahul.singh@arm.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
> ---
> Change in v5:
> - Move the pci_physdev_op() stub to xen/arch/arm/physdev.c.
> Change in v4:
> - Move file commom/physdev.c to drivers/pci/physdev.c
> - minor comments.
> Change in v3: Fixed minor comment.
> Change in v2:
> - Add support for PHYSDEVOP_pci_device_remove()
> - Move code to common code
> ---
> ---
> xen/arch/arm/physdev.c | 6 ++-
> xen/arch/x86/physdev.c | 52 +----------------------
> xen/arch/x86/x86_64/physdev.c | 2 +-
> xen/drivers/pci/Makefile | 1 +
> xen/drivers/pci/physdev.c | 80 +++++++++++++++++++++++++++++++++++
> xen/include/public/arch-arm.h | 4 +-
> xen/include/xen/hypercall.h | 4 ++
> 7 files changed, 96 insertions(+), 53 deletions(-)
> create mode 100644 xen/drivers/pci/physdev.c
>
> diff --git a/xen/arch/arm/physdev.c b/xen/arch/arm/physdev.c
> index e91355fe22..f9aa274dda 100644
> --- a/xen/arch/arm/physdev.c
> +++ b/xen/arch/arm/physdev.c
> @@ -8,13 +8,17 @@
> #include <xen/lib.h>
> #include <xen/errno.h>
> #include <xen/sched.h>
> -#include <asm/hypercall.h>
> +#include <xen/hypercall.h>
>
>
> int do_physdev_op(int cmd, XEN_GUEST_HANDLE_PARAM(void) arg)
> {
> +#ifdef CONFIG_HAS_PCI
> + return pci_physdev_op(cmd, arg);
> +#else
> gdprintk(XENLOG_DEBUG, "PHYSDEVOP cmd=%d: not implemented\n", cmd);
> return -ENOSYS;
> +#endif
> }
>
> /*
> diff --git a/xen/arch/x86/physdev.c b/xen/arch/x86/physdev.c
> index 23465bcd00..ea38be8b79 100644
> --- a/xen/arch/x86/physdev.c
> +++ b/xen/arch/x86/physdev.c
> @@ -12,7 +12,7 @@
> #include <asm/io_apic.h>
> #include <asm/msi.h>
> #include <asm/hvm/irq.h>
> -#include <asm/hypercall.h>
> +#include <xen/hypercall.h>
> #include <public/xen.h>
> #include <public/physdev.h>
> #include <xsm/xsm.h>
> @@ -480,54 +480,6 @@ ret_t do_physdev_op(int cmd, XEN_GUEST_HANDLE_PARAM(void) arg)
> break;
> }
>
> - case PHYSDEVOP_pci_device_add: {
> - struct physdev_pci_device_add add;
> - struct pci_dev_info pdev_info;
> - nodeid_t node;
> -
> - ret = -EFAULT;
> - if ( copy_from_guest(&add, arg, 1) != 0 )
> - break;
> -
> - pdev_info.is_extfn = !!(add.flags & XEN_PCI_DEV_EXTFN);
> - if ( add.flags & XEN_PCI_DEV_VIRTFN )
> - {
> - pdev_info.is_virtfn = 1;
> - pdev_info.physfn.bus = add.physfn.bus;
> - pdev_info.physfn.devfn = add.physfn.devfn;
> - }
> - else
> - pdev_info.is_virtfn = 0;
> -
> - if ( add.flags & XEN_PCI_DEV_PXM )
> - {
> - uint32_t pxm;
> - size_t optarr_off = offsetof(struct physdev_pci_device_add, optarr) /
> - sizeof(add.optarr[0]);
> -
> - if ( copy_from_guest_offset(&pxm, arg, optarr_off, 1) )
> - break;
> -
> - node = pxm_to_node(pxm);
> - }
> - else
> - node = NUMA_NO_NODE;
> -
> - ret = pci_add_device(add.seg, add.bus, add.devfn, &pdev_info, node);
> - break;
> - }
> -
> - case PHYSDEVOP_pci_device_remove: {
> - struct physdev_pci_device dev;
> -
> - ret = -EFAULT;
> - if ( copy_from_guest(&dev, arg, 1) != 0 )
> - break;
> -
> - ret = pci_remove_device(dev.seg, dev.bus, dev.devfn);
> - break;
> - }
> -
> case PHYSDEVOP_prepare_msix:
> case PHYSDEVOP_release_msix: {
> struct physdev_pci_device dev;
> @@ -663,7 +615,7 @@ ret_t do_physdev_op(int cmd, XEN_GUEST_HANDLE_PARAM(void) arg)
> }
>
> default:
> - ret = -ENOSYS;
> + ret = pci_physdev_op(cmd, arg);
> break;
> }
>
> diff --git a/xen/arch/x86/x86_64/physdev.c b/xen/arch/x86/x86_64/physdev.c
> index 0a50cbd4d8..e3cbd5ebcb 100644
> --- a/xen/arch/x86/x86_64/physdev.c
> +++ b/xen/arch/x86/x86_64/physdev.c
> @@ -9,7 +9,7 @@ EMIT_FILE;
> #include <compat/xen.h>
> #include <compat/event_channel.h>
> #include <compat/physdev.h>
> -#include <asm/hypercall.h>
> +#include <xen/hypercall.h>
>
> #define do_physdev_op compat_physdev_op
>
> diff --git a/xen/drivers/pci/Makefile b/xen/drivers/pci/Makefile
> index a98035df4c..972c923db0 100644
> --- a/xen/drivers/pci/Makefile
> +++ b/xen/drivers/pci/Makefile
> @@ -1 +1,2 @@
> obj-y += pci.o
> +obj-y += physdev.o
> diff --git a/xen/drivers/pci/physdev.c b/xen/drivers/pci/physdev.c
> new file mode 100644
> index 0000000000..4f3e1a96c0
> --- /dev/null
> +++ b/xen/drivers/pci/physdev.c
> @@ -0,0 +1,80 @@
> +
> +#include <xen/guest_access.h>
> +#include <xen/hypercall.h>
> +#include <xen/init.h>
> +
> +#ifndef COMPAT
> +typedef long ret_t;
> +#endif
> +
> +ret_t pci_physdev_op(int cmd, XEN_GUEST_HANDLE_PARAM(void) arg)
> +{
> + ret_t ret;
> +
> + switch ( cmd )
> + {
> + case PHYSDEVOP_pci_device_add: {
> + struct physdev_pci_device_add add;
> + struct pci_dev_info pdev_info;
> + nodeid_t node = NUMA_NO_NODE;
> +
> + ret = -EFAULT;
> + if ( copy_from_guest(&add, arg, 1) != 0 )
> + break;
> +
> + pdev_info.is_extfn = (add.flags & XEN_PCI_DEV_EXTFN);
> + if ( add.flags & XEN_PCI_DEV_VIRTFN )
> + {
> + pdev_info.is_virtfn = true;
> + pdev_info.physfn.bus = add.physfn.bus;
> + pdev_info.physfn.devfn = add.physfn.devfn;
> + }
> + else
> + pdev_info.is_virtfn = false;
> +
> +#ifdef CONFIG_NUMA
> + if ( add.flags & XEN_PCI_DEV_PXM )
> + {
> + uint32_t pxm;
> + size_t optarr_off = offsetof(struct physdev_pci_device_add, optarr) /
> + sizeof(add.optarr[0]);
> +
> + if ( copy_from_guest_offset(&pxm, arg, optarr_off, 1) )
> + break;
> +
> + node = pxm_to_node(pxm);
> + }
> +#endif
> +
> + ret = pci_add_device(add.seg, add.bus, add.devfn, &pdev_info, node);
> + break;
> + }
> +
> + case PHYSDEVOP_pci_device_remove: {
> + struct physdev_pci_device dev;
> +
> + ret = -EFAULT;
> + if ( copy_from_guest(&dev, arg, 1) != 0 )
> + break;
> +
> + ret = pci_remove_device(dev.seg, dev.bus, dev.devfn);
> + break;
> + }
> +
> + default:
> + ret = -ENOSYS;
> + break;
> + }
> +
> + return ret;
> +}
> +
> +/*
> + * Local variables:
> + * mode: C
> + * c-file-style: "BSD"
> + * c-basic-offset: 4
> + * tab-width: 4
> + * indent-tabs-mode: nil
> + * End:
> + */
> diff --git a/xen/include/public/arch-arm.h b/xen/include/public/arch-arm.h
> index 6b5a5f818a..d46c61fca9 100644
> --- a/xen/include/public/arch-arm.h
> +++ b/xen/include/public/arch-arm.h
> @@ -107,7 +107,9 @@
> * All generic sub-operations
> *
> * HYPERVISOR_physdev_op
> - * No sub-operations are currenty supported
> + * Exactly these sub-operations are supported:
> + * PHYSDEVOP_pci_device_add
> + * PHYSDEVOP_pci_device_remove
> *
> * HYPERVISOR_sysctl
> * All generic sub-operations, with the exception of:
> diff --git a/xen/include/xen/hypercall.h b/xen/include/xen/hypercall.h
> index 3771487a30..07b10ec230 100644
> --- a/xen/include/xen/hypercall.h
> +++ b/xen/include/xen/hypercall.h
> @@ -45,6 +45,10 @@ extern long
> do_platform_op(
> XEN_GUEST_HANDLE_PARAM(xen_platform_op_t) u_xenpf_op);
>
> +extern long
> +pci_physdev_op(
> + int cmd, XEN_GUEST_HANDLE_PARAM(void) arg);
> +
> /*
> * To allow safe resume of do_memory_op() after preemption, we need to know
> * at what point in the page list to resume. For this purpose I steal the
> --
> 2.25.1
>
next prev parent reply other threads:[~2021-10-07 0:06 UTC|newest]
Thread overview: 190+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-06 17:40 [PATCH v5 00/11] PCI devices passthrough on Arm Rahul Singh
2021-10-06 17:40 ` [PATCH v5 01/11] xen/arm: xc_domain_ioport_permission(..) not supported on ARM Rahul Singh
2021-10-11 11:47 ` Roger Pau Monné
2021-10-11 12:11 ` Bertrand Marquis
2021-10-11 13:20 ` Roger Pau Monné
2021-10-11 13:40 ` Bertrand Marquis
2021-10-11 13:57 ` Roger Pau Monné
2021-10-11 14:16 ` Bertrand Marquis
2021-10-11 16:32 ` Roger Pau Monné
2021-10-11 17:11 ` Bertrand Marquis
2021-10-12 8:29 ` Jan Beulich
2021-10-12 8:41 ` Bertrand Marquis
2021-10-12 9:32 ` Jan Beulich
2021-10-12 9:38 ` Oleksandr Andrushchenko
2021-10-12 10:01 ` Jan Beulich
2021-10-12 10:06 ` Oleksandr Andrushchenko
2021-10-12 10:20 ` Jan Beulich
2021-10-12 10:41 ` Bertrand Marquis
2021-10-12 10:44 ` Jan Beulich
2021-10-12 14:53 ` Ian Jackson
2021-10-12 16:15 ` Bertrand Marquis
2021-10-12 16:29 ` Ian Jackson
2021-10-12 20:42 ` Stefano Stabellini
2021-10-13 8:07 ` Roger Pau Monné
2021-10-13 11:52 ` Ian Jackson
2021-10-13 8:02 ` Roger Pau Monné
2021-10-13 12:02 ` Ian Jackson
2021-10-12 9:40 ` Bertrand Marquis
2021-10-12 10:03 ` Jan Beulich
2021-10-11 14:16 ` Oleksandr Andrushchenko
2021-10-06 17:40 ` [PATCH v5 02/11] xen/arm: Add PHYSDEVOP_pci_device_(*add/remove) support for ARM Rahul Singh
2021-10-07 0:05 ` Stefano Stabellini [this message]
2021-10-07 12:58 ` Jan Beulich
2021-10-21 9:28 ` xen/arm: Missing appropriate locking for the IOMMU (WAS Re: [PATCH v5 02/11] xen/arm: Add PHYSDEVOP_pci_device_(*add/remove) support for ARM) Julien Grall
2021-10-21 13:15 ` Bertrand Marquis
2021-10-21 13:47 ` Julien Grall
2021-10-21 13:52 ` Bertrand Marquis
2021-10-06 17:40 ` [PATCH v5 03/11] xen/arm: Add cmdline boot option "pci-passthrough = <boolean>" Rahul Singh
2021-10-07 8:27 ` Jan Beulich
2021-10-07 8:32 ` Rahul Singh
2021-10-07 12:59 ` Jan Beulich
2021-10-06 17:40 ` [PATCH v5 04/11] xen/arm: PCI host bridge discovery within XEN on ARM Rahul Singh
2021-10-06 17:40 ` [PATCH v5 05/11] xen/arm: Add support for Xilinx ZynqMP PCI host controller Rahul Singh
2021-10-06 17:40 ` [PATCH v5 06/11] xen/arm: Implement pci access functions Rahul Singh
2021-10-06 17:40 ` [PATCH v5 07/11] xen/domctl: Introduce XEN_DOMCTL_CDF_vpci flag Rahul Singh
2021-10-07 13:08 ` Jan Beulich
2021-10-08 18:06 ` Andrew Cooper
2021-10-08 21:12 ` Julien Grall
2021-10-08 21:46 ` Stefano Stabellini
2021-10-11 9:24 ` Julien Grall
2021-10-11 11:29 ` Michal Orzel
2021-10-11 11:35 ` Jan Beulich
2021-10-11 13:17 ` Roger Pau Monné
2021-10-11 9:48 ` Ian Jackson
2021-10-11 9:27 ` Roger Pau Monné
2021-10-11 12:06 ` Michal Orzel
2021-10-12 10:38 ` Michal Orzel
2021-10-13 8:30 ` Roger Pau Monné
2021-10-13 9:36 ` Bertrand Marquis
2021-10-13 10:56 ` Roger Pau Monné
2021-10-13 12:11 ` Bertrand Marquis
2021-10-13 12:57 ` Jan Beulich
2021-10-13 20:41 ` Stefano Stabellini
2021-10-14 6:23 ` Jan Beulich
2021-10-14 7:53 ` Bertrand Marquis
2021-10-13 14:28 ` Roger Pau Monné
2021-10-13 20:53 ` Stefano Stabellini
2021-10-13 23:21 ` Stefano Stabellini
2021-10-12 21:48 ` Stefano Stabellini
2021-10-13 6:18 ` Jan Beulich
2021-10-13 7:11 ` Michal Orzel
2021-10-06 17:40 ` [PATCH v5 08/11] xen/arm: Enable the existing x86 virtual PCI support for ARM Rahul Singh
2021-10-07 13:43 ` Jan Beulich
2021-10-11 12:41 ` Bertrand Marquis
2021-10-11 13:09 ` Jan Beulich
2021-10-11 13:34 ` Bertrand Marquis
2021-10-11 14:10 ` Jan Beulich
2021-10-11 14:52 ` Bertrand Marquis
2021-10-11 18:18 ` Stefano Stabellini
2021-10-12 8:04 ` Jan Beulich
2021-10-12 21:37 ` Stefano Stabellini
2021-10-13 6:10 ` Jan Beulich
2021-10-13 10:02 ` Bertrand Marquis
2021-10-13 12:21 ` Jan Beulich
2021-10-12 15:04 ` Julien Grall
2021-10-12 16:12 ` Bertrand Marquis
2021-10-12 16:20 ` Julien Grall
2021-10-12 17:50 ` Bertrand Marquis
2021-10-11 10:51 ` Roger Pau Monné
2021-10-11 16:12 ` Bertrand Marquis
2021-10-11 16:20 ` Oleksandr Andrushchenko
2021-10-11 16:43 ` Roger Pau Monné
2021-10-11 17:15 ` Bertrand Marquis
2021-10-11 18:30 ` Oleksandr Andrushchenko
2021-10-11 19:27 ` Stefano Stabellini
2021-10-12 5:34 ` Oleksandr Andrushchenko
2021-10-12 7:44 ` Bertrand Marquis
2021-10-12 14:32 ` Julien Grall
2021-10-12 14:34 ` Bertrand Marquis
2021-10-13 8:45 ` Roger Pau Monné
2021-10-13 9:48 ` Bertrand Marquis
2021-10-13 10:33 ` Roger Pau Monné
2021-10-13 13:00 ` Jan Beulich
2021-10-13 14:51 ` Oleksandr Andrushchenko
2021-10-13 15:15 ` Jan Beulich
2021-10-13 19:27 ` Stefano Stabellini
2021-10-14 6:33 ` Jan Beulich
2021-10-14 7:53 ` Bertrand Marquis
2021-10-14 9:03 ` Bertrand Marquis
2021-10-14 9:24 ` Jan Beulich
2021-10-06 17:40 ` [PATCH v5 09/11] xen/arm: Transitional change to build HAS_VPCI on ARM Rahul Singh
2021-10-11 11:43 ` Roger Pau Monné
2021-10-11 12:15 ` Bertrand Marquis
2021-10-12 1:32 ` Stefano Stabellini
2021-10-06 17:40 ` [PATCH v5 10/11] arm/libxl: Emulated PCI device tree node in libxl Rahul Singh
2021-10-06 18:01 ` Julien Grall
2021-10-07 0:26 ` Stefano Stabellini
2021-10-07 15:31 ` Rahul Singh
2021-10-07 10:53 ` Ian Jackson
2021-10-07 15:29 ` Rahul Singh
2021-10-07 16:11 ` Ian Jackson
2021-10-11 13:46 ` Roger Pau Monné
2021-10-14 17:16 ` Bertrand Marquis
2021-10-14 14:49 ` [PATCH v6 0/3] PCI devices passthrough on Arm Bertrand Marquis
2021-10-14 14:49 ` [PATCH v6 1/3] xen/vpci: Move ecam access functions to common code Bertrand Marquis
2021-10-14 16:06 ` Jan Beulich
2021-10-14 17:09 ` Bertrand Marquis
2021-10-15 6:29 ` Jan Beulich
2021-10-15 7:37 ` Bertrand Marquis
2021-10-15 8:13 ` Jan Beulich
2021-10-15 8:20 ` Bertrand Marquis
2021-10-15 8:24 ` Jan Beulich
2021-10-15 9:49 ` Roger Pau Monné
2021-10-14 23:47 ` Stefano Stabellini
2021-10-15 7:44 ` Roger Pau Monné
2021-10-15 7:53 ` Bertrand Marquis
2021-10-15 9:53 ` Roger Pau Monné
2021-10-15 10:12 ` Bertrand Marquis
2021-10-15 10:14 ` Jan Beulich
2021-10-14 14:49 ` [PATCH v6 2/3] xen/arm: Enable the existing x86 virtual PCI support for ARM Bertrand Marquis
2021-10-14 23:49 ` Stefano Stabellini
2021-10-15 6:40 ` Jan Beulich
2021-10-15 9:59 ` Ian Jackson
2021-10-15 10:10 ` Bertrand Marquis
2021-10-15 8:00 ` Jan Beulich
2021-10-15 10:09 ` Bertrand Marquis
2021-10-15 10:14 ` Ian Jackson
2021-10-15 10:18 ` Jan Beulich
2021-10-15 11:35 ` Roger Pau Monné
2021-10-15 12:13 ` Bertrand Marquis
2021-10-15 12:18 ` Jan Beulich
2021-10-15 12:28 ` Bertrand Marquis
2021-10-15 13:00 ` Jan Beulich
2021-10-15 13:10 ` Bertrand Marquis
2021-10-15 10:38 ` Jan Beulich
2021-10-15 8:32 ` Roger Pau Monné
2021-10-15 8:42 ` Michal Orzel
2021-10-15 9:52 ` Bertrand Marquis
2021-10-15 10:13 ` Luca Fancellu
2021-10-15 10:17 ` Bertrand Marquis
2021-10-15 10:19 ` Roger Pau Monné
2021-10-15 10:31 ` Bertrand Marquis
2021-10-15 10:24 ` Jan Beulich
2021-10-15 10:33 ` Bertrand Marquis
2021-10-15 10:41 ` Jan Beulich
2021-10-15 10:48 ` Bertrand Marquis
2021-10-15 10:51 ` Jan Beulich
2021-10-15 11:08 ` Bertrand Marquis
2021-10-15 13:47 ` Roger Pau Monné
2021-10-15 14:00 ` Luca Fancellu
2021-10-15 14:32 ` Roger Pau Monné
2021-10-14 14:49 ` [PATCH v6 3/3] arm/libxl: Emulated PCI device tree node in libxl Bertrand Marquis
2021-10-14 17:54 ` [PATCH v6 3/3] arm/libxl: Emulated PCI device tree node in libxl [and 1 more messages] Ian Jackson
2021-10-14 23:50 ` Stefano Stabellini
2021-10-15 7:28 ` Julien Grall
2021-10-15 7:41 ` Michal Orzel
2021-10-15 9:01 ` Julien Grall
2021-10-15 10:02 ` Ian Jackson
2021-10-15 10:58 ` Michal Orzel
2021-10-15 11:04 ` Michal Orzel
2021-10-15 11:46 ` Ian Jackson
2021-10-15 11:53 ` Michal Orzel
2021-10-15 12:10 ` Julien Grall
2021-10-15 12:14 ` Ian Jackson
2021-10-15 12:13 ` Ian Jackson
2021-10-12 15:03 ` [PATCH v5 10/11] arm/libxl: Emulated PCI device tree node in libxl Ian Jackson
2021-10-06 17:40 ` [PATCH v5 11/11] xen/arm: Add linux,pci-domain property for hwdom if not available Rahul Singh
2021-10-13 20:54 ` Stefano Stabellini
2021-10-07 19:54 ` [PATCH v5 00/11] PCI devices passthrough on Arm Stefano Stabellini
2021-10-07 21:29 ` Rahul Singh
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as well as URLs for NNTP newsgroup(s).