Mailing List Archive

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.

Signed-off-by: Rahul Singh <rahul.singh@arm.com>
---
Change in v2:
- Add support for PHYSDEVOP_pci_device_remove()
- Move code to common code
---
xen/arch/arm/physdev.c | 5 +-
xen/arch/x86/physdev.c | 50 +-------------------
xen/arch/x86/x86_64/physdev.c | 4 +-
xen/common/Makefile | 1 +
xen/common/physdev.c | 81 +++++++++++++++++++++++++++++++++
xen/include/asm-arm/hypercall.h | 2 -
xen/include/asm-arm/numa.h | 5 ++
xen/include/asm-x86/hypercall.h | 9 ++--
xen/include/xen/hypercall.h | 8 ++++
9 files changed, 106 insertions(+), 59 deletions(-)
create mode 100644 xen/common/physdev.c

diff --git a/xen/arch/arm/physdev.c b/xen/arch/arm/physdev.c
index e91355fe22..4e00b03aab 100644
--- a/xen/arch/arm/physdev.c
+++ b/xen/arch/arm/physdev.c
@@ -8,10 +8,9 @@
#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)
+long arch_physdev_op(int cmd, XEN_GUEST_HANDLE_PARAM(void) arg)
{
gdprintk(XENLOG_DEBUG, "PHYSDEVOP cmd=%d: not implemented\n", cmd);
return -ENOSYS;
diff --git a/xen/arch/x86/physdev.c b/xen/arch/x86/physdev.c
index 23465bcd00..c00cc99404 100644
--- a/xen/arch/x86/physdev.c
+++ b/xen/arch/x86/physdev.c
@@ -174,7 +174,7 @@ int physdev_unmap_pirq(domid_t domid, int pirq)
}
#endif /* COMPAT */

-ret_t do_physdev_op(int cmd, XEN_GUEST_HANDLE_PARAM(void) arg)
+ret_t arch_physdev_op(int cmd, XEN_GUEST_HANDLE_PARAM(void) arg)
{
int irq;
ret_t ret;
@@ -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;
diff --git a/xen/arch/x86/x86_64/physdev.c b/xen/arch/x86/x86_64/physdev.c
index 0a50cbd4d8..5f72652ff7 100644
--- a/xen/arch/x86/x86_64/physdev.c
+++ b/xen/arch/x86/x86_64/physdev.c
@@ -9,9 +9,10 @@ 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
+#define arch_physdev_op arch_compat_physdev_op

#define physdev_apic compat_physdev_apic
#define physdev_apic_t physdev_apic_compat_t
@@ -82,6 +83,7 @@ CHECK_physdev_pci_device
typedef int ret_t;

#include "../physdev.c"
+#include "../../../common/physdev.c"

/*
* Local variables:
diff --git a/xen/common/Makefile b/xen/common/Makefile
index 54de70d422..bcb1c8fb03 100644
--- a/xen/common/Makefile
+++ b/xen/common/Makefile
@@ -29,6 +29,7 @@ obj-y += notifier.o
obj-y += page_alloc.o
obj-$(CONFIG_HAS_PDX) += pdx.o
obj-$(CONFIG_PERF_COUNTERS) += perfc.o
+obj-y += physdev.o
obj-y += preempt.o
obj-y += random.o
obj-y += rangeset.o
diff --git a/xen/common/physdev.c b/xen/common/physdev.c
new file mode 100644
index 0000000000..8d44b20db8
--- /dev/null
+++ b/xen/common/physdev.c
@@ -0,0 +1,81 @@
+
+#include <xen/guest_access.h>
+#include <xen/hypercall.h>
+#include <xen/init.h>
+
+#ifndef COMPAT
+typedef long ret_t;
+#endif
+
+ret_t do_physdev_op(int cmd, XEN_GUEST_HANDLE_PARAM(void) arg)
+{
+ ret_t ret;
+
+ switch ( cmd )
+ {
+#ifdef CONFIG_HAS_PCI
+ 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;
+ }
+#endif
+ default:
+ ret = arch_physdev_op(cmd, arg);;
+ 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/asm-arm/hypercall.h b/xen/include/asm-arm/hypercall.h
index a0c5a31a2f..c6e4a04fd6 100644
--- a/xen/include/asm-arm/hypercall.h
+++ b/xen/include/asm-arm/hypercall.h
@@ -2,8 +2,6 @@
#define __ASM_ARM_HYPERCALL_H__

#include <public/domctl.h> /* for arch_do_domctl */
-int do_physdev_op(int cmd, XEN_GUEST_HANDLE_PARAM(void) arg);
-
long do_arm_vcpu_op(int cmd, unsigned int vcpuid, XEN_GUEST_HANDLE_PARAM(void) arg);

long subarch_do_domctl(struct xen_domctl *domctl, struct domain *d,
diff --git a/xen/include/asm-arm/numa.h b/xen/include/asm-arm/numa.h
index 31a6de4e23..dbd1c2467f 100644
--- a/xen/include/asm-arm/numa.h
+++ b/xen/include/asm-arm/numa.h
@@ -25,6 +25,11 @@ extern mfn_t first_valid_mfn;
#define node_start_pfn(nid) (mfn_x(first_valid_mfn))
#define __node_distance(a, b) (20)

+static inline nodeid_t pxm_to_node(unsigned pxm)
+{
+ return 0xff;
+}
+
#endif /* __ARCH_ARM_NUMA_H */
/*
* Local variables:
diff --git a/xen/include/asm-x86/hypercall.h b/xen/include/asm-x86/hypercall.h
index 0ae3b8b043..7afba98186 100644
--- a/xen/include/asm-x86/hypercall.h
+++ b/xen/include/asm-x86/hypercall.h
@@ -105,10 +105,6 @@ do_update_va_mapping(
u64 val64,
unsigned long flags);

-extern long
-do_physdev_op(
- int cmd, XEN_GUEST_HANDLE_PARAM(void) arg);
-
extern long
do_update_va_mapping_otherdomain(
unsigned long va,
@@ -151,6 +147,11 @@ compat_physdev_op(
int cmd,
XEN_GUEST_HANDLE_PARAM(void) arg);

+extern int
+arch_compat_physdev_op(
+ int cmd,
+ XEN_GUEST_HANDLE_PARAM(void) arg);
+
extern int
arch_compat_vcpu_op(
int cmd, struct vcpu *v, XEN_GUEST_HANDLE_PARAM(void) arg);
diff --git a/xen/include/xen/hypercall.h b/xen/include/xen/hypercall.h
index 3771487a30..5cc74f40b7 100644
--- a/xen/include/xen/hypercall.h
+++ b/xen/include/xen/hypercall.h
@@ -45,6 +45,14 @@ extern long
do_platform_op(
XEN_GUEST_HANDLE_PARAM(xen_platform_op_t) u_xenpf_op);

+extern long
+do_physdev_op(
+ int cmd, XEN_GUEST_HANDLE_PARAM(void) arg);
+
+extern long
+arch_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
--
2.17.1