prepare for 32bit pci root bus
-v2: hpa said we should compare with (resource_size_t)~0
-v3: according to Linus to use MAX_RESOURCE instead.
also need need to put related patches together
-v4: according to Andrew, use min in cap_resource()
Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx>
Acked-by: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>
---
arch/x86/pci/amd_bus.c | 8 +++++---
arch/x86/pci/bus_numa.c | 4 ++++
include/linux/range.h | 8 ++++++++
3 files changed, 17 insertions(+), 3 deletions(-)
diff --git a/arch/x86/pci/amd_bus.c b/arch/x86/pci/amd_bus.c
index f06bb1b..f7e13b6 100644
--- a/arch/x86/pci/amd_bus.c
+++ b/arch/x86/pci/amd_bus.c
@@ -201,7 +201,7 @@ static int __init early_fill_mp_bus_info(void)
memset(range, 0, sizeof(range));
/* 0xfd00000000-0xffffffffff for HT */
- range[0].end = (0xfdULL<<32) - 1;
+ range[0].end = cap_resource((0xfdULL<<32) - 1);
/* need to take out [0, TOM) for RAM*/
address = MSR_K8_TOP_MEM1;
@@ -286,7 +286,8 @@ static int __init early_fill_mp_bus_info(void)
}
}
- update_res(info, start, end, IORESOURCE_MEM, 1);
+ update_res(info, cap_resource(start), cap_resource(end),
+ IORESOURCE_MEM, 1);
subtract_range(range, RANGE_NUM, start, end);
printk(KERN_CONT "\n");
}
@@ -321,7 +322,8 @@ static int __init early_fill_mp_bus_info(void)
if (!range[i].end)
continue;
- update_res(info, range[i].start, range[i].end,
+ update_res(info, cap_resource(range[i].start),
+ cap_resource(range[i].end),
IORESOURCE_MEM, 1);
}
}
diff --git a/arch/x86/pci/bus_numa.c b/arch/x86/pci/bus_numa.c
index 3411687..3510778 100644
--- a/arch/x86/pci/bus_numa.c
+++ b/arch/x86/pci/bus_numa.c
@@ -1,5 +1,6 @@
#include <linux/init.h>
#include <linux/pci.h>
+#include <linux/range.h>
#include "bus_numa.h"
@@ -55,6 +56,9 @@ void __devinit update_res(struct pci_root_info *info, resource_size_t start,
if (start > end)
return;
+ if (start == MAX_RESOURCE)
+ return;
+
if (!merge)
goto addit;
diff --git a/include/linux/range.h b/include/linux/range.h
index 0789f14..bd184a5 100644
--- a/include/linux/range.h
+++ b/include/linux/range.h
@@ -19,4 +19,12 @@ int clean_sort_range(struct range *range, int az);
void sort_range(struct range *range, int nr_range);
+#define MAX_RESOURCE ((resource_size_t)~0)
+static inline resource_size_t cap_resource(u64 val)
+{
+ if (val > MAX_RESOURCE)
+ return MAX_RESOURCE;
+
+ return val;
+}
#endif
--
1.6.4.2
--
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