Allow PCI config space syscalls to be used by 64-bit processes.
The pciconfig_iobase, pciconfig_read and pciconfig_write system calls
were only implemented for 32-bit processes; for 64-bit processes they
returned an ENOSYS error. This allows them to be used by 64-bit
processes as well. The X server uses pciconfig_iobase at least, and
this change is necessary to allow a 64-bit X server to work on my G5.
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/ppc64/kernel/misc.S b/arch/ppc64/kernel/misc.S
index 6d860c1..c047663 100644
--- a/arch/ppc64/kernel/misc.S
+++ b/arch/ppc64/kernel/misc.S
@@ -1431,9 +1431,9 @@
.llong .sys_ni_syscall /* 195 - 32bit only stat64 */
.llong .sys_ni_syscall /* 32bit only lstat64 */
.llong .sys_ni_syscall /* 32bit only fstat64 */
- .llong .sys_ni_syscall /* 32bit only pciconfig_read */
- .llong .sys_ni_syscall /* 32bit only pciconfig_write */
- .llong .sys_ni_syscall /* 32bit only pciconfig_iobase */
+ .llong .sys_pciconfig_read
+ .llong .sys_pciconfig_write
+ .llong .sys_pciconfig_iobase /* 200 - pciconfig_iobase */
.llong .sys_ni_syscall /* reserved for MacOnLinux */
.llong .sys_getdents64
.llong .sys_pivot_root
diff --git a/arch/ppc64/kernel/pci.c b/arch/ppc64/kernel/pci.c
index 446b465..8447dcc 100644
--- a/arch/ppc64/kernel/pci.c
+++ b/arch/ppc64/kernel/pci.c
@@ -21,6 +21,7 @@
#include <linux/bootmem.h>
#include <linux/mm.h>
#include <linux/list.h>
+#include <linux/syscalls.h>
#include <asm/processor.h>
#include <asm/io.h>
@@ -984,3 +985,62 @@
}
#endif /* CONFIG_PPC_MULTIPLATFORM */
+
+
+#define IOBASE_BRIDGE_NUMBER 0
+#define IOBASE_MEMORY 1
+#define IOBASE_IO 2
+#define IOBASE_ISA_IO 3
+#define IOBASE_ISA_MEM 4
+
+long sys_pciconfig_iobase(long which, unsigned long in_bus,
+ unsigned long in_devfn)
+{
+ struct pci_controller* hose;
+ struct list_head *ln;
+ struct pci_bus *bus = NULL;
+ struct device_node *hose_node;
+
+ /* Argh ! Please forgive me for that hack, but that's the
+ * simplest way to get existing XFree to not lockup on some
+ * G5 machines... So when something asks for bus 0 io base
+ * (bus 0 is HT root), we return the AGP one instead.
+ */
+#ifdef CONFIG_PPC_PMAC
+ if (systemcfg->platform == PLATFORM_POWERMAC &&
+ machine_is_compatible("MacRISC4"))
+ if (in_bus == 0)
+ in_bus = 0xf0;
+#endif /* CONFIG_PPC_PMAC */
+
+ /* That syscall isn't quite compatible with PCI domains, but it's
+ * used on pre-domains setup. We return the first match
+ */
+
+ for (ln = pci_root_buses.next; ln != &pci_root_buses; ln = ln->next) {
+ bus = pci_bus_b(ln);
+ if (in_bus >= bus->number && in_bus < (bus->number + bus->subordinate))
+ break;
+ bus = NULL;
+ }
+ if (bus == NULL || bus->sysdata == NULL)
+ return -ENODEV;
+
+ hose_node = (struct device_node *)bus->sysdata;
+ hose = PCI_DN(hose_node)->phb;
+
+ switch (which) {
+ case IOBASE_BRIDGE_NUMBER:
+ return (long)hose->first_busno;
+ case IOBASE_MEMORY:
+ return (long)hose->pci_mem_offset;
+ case IOBASE_IO:
+ return (long)hose->io_base_phys;
+ case IOBASE_ISA_IO:
+ return (long)isa_io_base;
+ case IOBASE_ISA_MEM:
+ return -EINVAL;
+ }
+
+ return -EOPNOTSUPP;
+}
diff --git a/arch/ppc64/kernel/sys_ppc32.c b/arch/ppc64/kernel/sys_ppc32.c
index 57a6db7..e93c134 100644
--- a/arch/ppc64/kernel/sys_ppc32.c
+++ b/arch/ppc64/kernel/sys_ppc32.c
@@ -708,62 +708,9 @@
compat_ptr(ubuf));
}
-#define IOBASE_BRIDGE_NUMBER 0
-#define IOBASE_MEMORY 1
-#define IOBASE_IO 2
-#define IOBASE_ISA_IO 3
-#define IOBASE_ISA_MEM 4
-
asmlinkage int sys32_pciconfig_iobase(u32 which, u32 in_bus, u32 in_devfn)
{
-#ifdef CONFIG_PCI
- struct pci_controller* hose;
- struct list_head *ln;
- struct pci_bus *bus = NULL;
- struct device_node *hose_node;
-
- /* Argh ! Please forgive me for that hack, but that's the
- * simplest way to get existing XFree to not lockup on some
- * G5 machines... So when something asks for bus 0 io base
- * (bus 0 is HT root), we return the AGP one instead.
- */
-#ifdef CONFIG_PPC_PMAC
- if (systemcfg->platform == PLATFORM_POWERMAC &&
- machine_is_compatible("MacRISC4"))
- if (in_bus == 0)
- in_bus = 0xf0;
-#endif /* CONFIG_PPC_PMAC */
-
- /* That syscall isn't quite compatible with PCI domains, but it's
- * used on pre-domains setup. We return the first match
- */
-
- for (ln = pci_root_buses.next; ln != &pci_root_buses; ln = ln->next) {
- bus = pci_bus_b(ln);
- if (in_bus >= bus->number && in_bus < (bus->number + bus->subordinate))
- break;
- bus = NULL;
- }
- if (bus == NULL || bus->sysdata == NULL)
- return -ENODEV;
-
- hose_node = bus->sysdata;
- hose = PCI_DN(hose_node)->phb;
-
- switch (which) {
- case IOBASE_BRIDGE_NUMBER:
- return (long)hose->first_busno;
- case IOBASE_MEMORY:
- return (long)hose->pci_mem_offset;
- case IOBASE_IO:
- return (long)hose->io_base_phys;
- case IOBASE_ISA_IO:
- return (long)isa_io_base;
- case IOBASE_ISA_MEM:
- return -EINVAL;
- }
-#endif /* CONFIG_PCI */
- return -EOPNOTSUPP;
+ return sys_pciconfig_iobase(which, in_bus, in_devfn);
}
