This is needed for MSI-X, since MSI-X will need to be initialized
before parsing the BARs, so that the header BAR handlers are aware of
the MSI-X related holes and make sure they are not mapped in order for
the trap handlers to work properly.
Signed-off-by: Roger Pau Monné <roger....@citrix.com>
Reviewed-by: Jan Beulich <jbeul...@suse.com>
---
Cc: Stefano Stabellini <sstabell...@kernel.org>
Cc: Julien Grall <julien.gr...@arm.com>
Cc: Andrew Cooper <andrew.coop...@citrix.com>
Cc: George Dunlap <george.dun...@eu.citrix.com>
Cc: Ian Jackson <ian.jack...@eu.citrix.com>
Cc: Jan Beulich <jbeul...@suse.com>
Cc: Konrad Rzeszutek Wilk <konrad.w...@oracle.com>
Cc: Tim Deegan <t...@xen.org>
Cc: Wei Liu <wei.l...@citrix.com>
---
Changes since v4:
- Add a middle priority and add the PCI header to it.
Changes since v3:
- Add a numerial suffix to the section used to store the pointer to
each initializer function, and sort them at link time.
---
xen/arch/arm/xen.lds.S | 4 ++--
xen/arch/x86/xen.lds.S | 4 ++--
xen/drivers/vpci/header.c | 2 +-
xen/drivers/vpci/msi.c | 2 +-
xen/include/xen/vpci.h | 8 ++++++--
5 files changed, 12 insertions(+), 8 deletions(-)
diff --git a/xen/arch/arm/xen.lds.S b/xen/arch/arm/xen.lds.S
index 49cae2af71..245a0e0e85 100644
--- a/xen/arch/arm/xen.lds.S
+++ b/xen/arch/arm/xen.lds.S
@@ -69,7 +69,7 @@ SECTIONS
#if defined(CONFIG_HAS_VPCI) && defined(CONFIG_LATE_HWDOM)
. = ALIGN(POINTER_ALIGN);
__start_vpci_array = .;
- *(.data.vpci)
+ *(SORT(.data.vpci.*))
__end_vpci_array = .;
#endif
} :text
@@ -182,7 +182,7 @@ SECTIONS
#if defined(CONFIG_HAS_VPCI) && !defined(CONFIG_LATE_HWDOM)
. = ALIGN(POINTER_ALIGN);
__start_vpci_array = .;
- *(.data.vpci)
+ *(SORT(.data.vpci.*))
__end_vpci_array = .;
#endif
} :text
diff --git a/xen/arch/x86/xen.lds.S b/xen/arch/x86/xen.lds.S
index 7bd6fb51c3..70afedd31d 100644
--- a/xen/arch/x86/xen.lds.S
+++ b/xen/arch/x86/xen.lds.S
@@ -139,7 +139,7 @@ SECTIONS
#if defined(CONFIG_HAS_VPCI) && defined(CONFIG_LATE_HWDOM)
. = ALIGN(POINTER_ALIGN);
__start_vpci_array = .;
- *(.data.vpci)
+ *(SORT(.data.vpci.*))
__end_vpci_array = .;
#endif
} :text
@@ -246,7 +246,7 @@ SECTIONS
#if defined(CONFIG_HAS_VPCI) && !defined(CONFIG_LATE_HWDOM)
. = ALIGN(POINTER_ALIGN);
__start_vpci_array = .;
- *(.data.vpci)
+ *(SORT(.data.vpci.*))
__end_vpci_array = .;
#endif
} :text
diff --git a/xen/drivers/vpci/header.c b/xen/drivers/vpci/header.c
index b502bac81e..28e599f445 100644
--- a/xen/drivers/vpci/header.c
+++ b/xen/drivers/vpci/header.c
@@ -539,7 +539,7 @@ static int init_bars(struct pci_dev *pdev)
return (cmd & PCI_COMMAND_MEMORY) ? modify_bars(pdev, true, false) : 0;
}
-REGISTER_VPCI_INIT(init_bars);
+REGISTER_VPCI_INIT(init_bars, VPCI_PRIORITY_MIDDLE);
/*
* Local variables:
diff --git a/xen/drivers/vpci/msi.c b/xen/drivers/vpci/msi.c
index c3c69ec453..de4ddf562e 100644
--- a/xen/drivers/vpci/msi.c
+++ b/xen/drivers/vpci/msi.c
@@ -267,7 +267,7 @@ static int init_msi(struct pci_dev *pdev)
return 0;
}
-REGISTER_VPCI_INIT(init_msi);
+REGISTER_VPCI_INIT(init_msi, VPCI_PRIORITY_LOW);
void vpci_dump_msi(void)
{
diff --git a/xen/include/xen/vpci.h b/xen/include/xen/vpci.h
index 116b93f519..7266c17679 100644
--- a/xen/include/xen/vpci.h
+++ b/xen/include/xen/vpci.h
@@ -15,9 +15,13 @@ typedef void vpci_write_t(const struct pci_dev *pdev,
unsigned int reg,
typedef int vpci_register_init_t(struct pci_dev *dev);
-#define REGISTER_VPCI_INIT(x) \
+#define VPCI_PRIORITY_HIGH "1"
+#define VPCI_PRIORITY_MIDDLE "5"
+#define VPCI_PRIORITY_LOW "9"
+
+#define REGISTER_VPCI_INIT(x, p) \
static vpci_register_init_t *const x##_entry \
- __used_section(".data.vpci") = x
+ __used_section(".data.vpci." p) = x
/* Add vPCI handlers to device. */
int __must_check vpci_add_handlers(struct pci_dev *dev);
--
2.16.2
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xenproject.org
https://lists.xenproject.org/mailman/listinfo/xen-devel
