[PATCH] makedumpfile: Enable --mem-usage for s390x

[Michael Holzheu]

Hello Atsushi,

On Thu, 30 Oct 2014 01:29:18 +0000
Atsushi Kumagai <kumagai-atsushi at mxc.nes.nec.co.jp> wrote:

[snip]

> Now I don't plan to use is_iomem_phys_addr() for non s390x architectures,
> I prefer putting is_iomem_phys_addr() into arch/s390x.c as Baoquan
> commented before.
> 
> Could you modify the patch ? or any questions ?

I modified the patch and moved the is_iomem_phys_addr() function to
s390x.c. I did not add __pa() because currently I don't see the
need for it (?).

The updated patch below applies on top of our "Compile warnings on
archs without get_versiondep_info()" patch.

Michael
---
[PATCH] makedumpfile: Enable --mem-usage for s390x

Replace is_vmalloc_addr() by is_phys_addr() and implement is_phys_addr()
on s390x using /proc/iommem parsing to enable the new makedumpfile
option "--mem-usage".

Signed-off-by: Michael Holzheu <holzheu at linux.vnet.ibm.com>
---
 arch/s390x.c   |   26 ++++++++++++++++++++++++++
 elf_info.c     |    4 ++--
 makedumpfile.h |   20 +++++++++++++-------
 3 files changed, 41 insertions(+), 9 deletions(-)

--- a/arch/s390x.c
+++ b/arch/s390x.c
@@ -308,4 +308,30 @@ vaddr_to_paddr_s390x(unsigned long vaddr
 	return paddr;
 }
 
+struct addr_check {
+	unsigned long addr;
+	int found;
+};
+
+static int phys_addr_callback(void *data, int nr, char *str,
+			      unsigned long base, unsigned long length)
+{
+	struct addr_check *addr_check = data;
+	unsigned long addr = addr_check->addr;
+
+	if (addr >= base && addr < base + length) {
+		addr_check->found = 1;
+		return -1;
+	}
+	return 0;
+}
+
+int is_iomem_phys_addr_s390x(unsigned long addr)
+{
+	struct addr_check addr_check = {addr, 0};
+
+	iomem_for_each_line("System RAM\n", phys_addr_callback, &addr_check);
+	return addr_check.found;
+}
+
 #endif /* __s390x__ */
--- a/elf_info.c
+++ b/elf_info.c
@@ -854,7 +854,7 @@ int get_kcore_dump_loads(void)
 
 	for (i = 0; i < num_pt_loads; ++i) {
 		struct pt_load_segment *p = &pt_loads[i];
-		if (is_vmalloc_addr(p->virt_start))
+		if (!is_phys_addr(p->virt_start))
 			continue;
 		loads++;
 	}
@@ -874,7 +874,7 @@ int get_kcore_dump_loads(void)
 
 	for (i = 0, j = 0; i < num_pt_loads; ++i) {
 		struct pt_load_segment *p = &pt_loads[i];
-		if (is_vmalloc_addr(p->virt_start))
+		if (!is_phys_addr(p->virt_start))
 			continue;
 		if (j >= loads)
 			return FALSE;
--- a/makedumpfile.h
+++ b/makedumpfile.h
@@ -767,7 +767,7 @@ unsigned long long vaddr_to_paddr_arm(un
 #define get_machdep_info()	get_machdep_info_arm()
 #define get_versiondep_info()	stub_true()
 #define vaddr_to_paddr(X)	vaddr_to_paddr_arm(X)
-#define is_vmalloc_addr(X)	stub_true_ul(X)
+#define is_phys_addr(X)		stub_true_ul(X)
 #endif /* arm */
 
 #ifdef __x86__
@@ -778,7 +778,7 @@ unsigned long long vaddr_to_paddr_x86(un
 #define get_machdep_info()	get_machdep_info_x86()
 #define get_versiondep_info()	get_versiondep_info_x86()
 #define vaddr_to_paddr(X)	vaddr_to_paddr_x86(X)
-#define is_vmalloc_addr(X)	stub_true_ul(X)
+#define is_phys_addr(X)		stub_true_ul(X)
 #endif /* x86 */
 
 #ifdef __x86_64__
@@ -791,7 +791,7 @@ unsigned long long vaddr_to_paddr_x86_64
 #define get_machdep_info()	get_machdep_info_x86_64()
 #define get_versiondep_info()	get_versiondep_info_x86_64()
 #define vaddr_to_paddr(X)	vaddr_to_paddr_x86_64(X)
-#define is_vmalloc_addr(X)	is_vmalloc_addr_x86_64(X)
+#define is_phys_addr(X)		(!is_vmalloc_addr_x86_64(X))
 #endif /* x86_64 */
 
 #ifdef __powerpc64__ /* powerpc64 */
@@ -802,7 +802,7 @@ unsigned long long vaddr_to_paddr_ppc64(
 #define get_machdep_info()	get_machdep_info_ppc64()
 #define get_versiondep_info()	get_versiondep_info_ppc64()
 #define vaddr_to_paddr(X)	vaddr_to_paddr_ppc64(X)
-#define is_vmalloc_addr(X)	stub_true_ul(X)
+#define is_phys_addr(X)		stub_true_ul(X)
 #endif          /* powerpc64 */
 
 #ifdef __powerpc32__ /* powerpc32 */
@@ -812,17 +812,18 @@ unsigned long long vaddr_to_paddr_ppc(un
 #define get_machdep_info()	get_machdep_info_ppc()
 #define get_versiondep_info()	stub_true()
 #define vaddr_to_paddr(X)	vaddr_to_paddr_ppc(X)
-#define is_vmalloc_addr(X)	stub_true_ul(X)
+#define is_phys_addr(X)		stub_true_ul(X)
 #endif          /* powerpc32 */
 
 #ifdef __s390x__ /* s390x */
 int get_machdep_info_s390x(void);
 unsigned long long vaddr_to_paddr_s390x(unsigned long vaddr);
+int is_iomem_phys_addr_s390x(unsigned long addr);
 #define get_phys_base()		stub_true()
 #define get_machdep_info()	get_machdep_info_s390x()
 #define get_versiondep_info()	stub_true()
 #define vaddr_to_paddr(X)	vaddr_to_paddr_s390x(X)
-#define is_vmalloc_addr(X)	stub_true_ul(X)
+#define is_phys_addr(X)		is_iomem_phys_addr_s390x(X)
 #endif          /* s390x */
 
 #ifdef __ia64__ /* ia64 */
@@ -834,7 +835,7 @@ unsigned long long vaddr_to_paddr_ia64(u
 #define get_versiondep_info()	stub_true()
 #define vaddr_to_paddr(X)	vaddr_to_paddr_ia64(X)
 #define VADDR_REGION(X)		(((unsigned long)(X)) >> REGION_SHIFT)
-#define is_vmalloc_addr(X)	stub_true_ul(X)
+#define is_phys_addr(X)		stub_true_ul(X)
 #endif          /* ia64 */
 
 typedef unsigned long long mdf_pfn_t;
@@ -1569,6 +1570,11 @@ int read_disk_dump_header(struct disk_du
 int read_kdump_sub_header(struct kdump_sub_header *kh, char *filename);
 void close_vmcoreinfo(void);
 int close_files_for_creating_dumpfile(void);
+int iomem_for_each_line(char *match, int (*callback)(void *data, int nr,
+						     char *str,
+						     unsigned long base,
+						     unsigned long length),
+			void *data);
 
 
 /*