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* [Patch 1/2] Kexec/Kdump support POWER6
@ 2007-05-23  9:34 Sachin P. Sant
  0 siblings, 0 replies; 2+ messages in thread
From: Sachin P. Sant @ 2007-05-23  9:34 UTC (permalink / raw)
  To: linuxppc-dev, Paul Mackerras; +Cc: Olof Johansson, Milton Miller II

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Read supported VRMA page size from device tree.

Thanks
-Sachin




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* Read supported VRMA page size from device tree.

Signed-Off-By : Sachin Sant <sachinp@in.ibm.com>
Signed-Off-By : Mohan Kumar M <mohan@in.ibm.com>
---

diff -Naurp linux-2.6.22-rc2/arch/powerpc/kernel/setup_64.c linux-2.6.22-rc2-vrma/arch/powerpc/kernel/setup_64.c
--- linux-2.6.22-rc2/arch/powerpc/kernel/setup_64.c	2007-05-19 09:36:17.000000000 +0530
+++ linux-2.6.22-rc2-vrma/arch/powerpc/kernel/setup_64.c	2007-05-23 11:25:45.000000000 +0530
@@ -73,6 +73,10 @@ int have_of = 1;
 int boot_cpuid = 0;
 u64 ppc64_pft_size;
 
+/* For VRMA */
+u64 ppc64_vrma_page_shift;
+int have_vrma = 0;
+
 /* Pick defaults since we might want to patch instructions
  * before we've read this from the device tree.
  */
diff -Naurp linux-2.6.22-rc2/arch/powerpc/mm/hash_utils_64.c linux-2.6.22-rc2-vrma/arch/powerpc/mm/hash_utils_64.c
--- linux-2.6.22-rc2/arch/powerpc/mm/hash_utils_64.c	2007-05-19 09:36:17.000000000 +0530
+++ linux-2.6.22-rc2-vrma/arch/powerpc/mm/hash_utils_64.c	2007-05-23 11:26:03.000000000 +0530
@@ -199,6 +199,13 @@ static int __init htab_dt_scan_page_size
 	if (type == NULL || strcmp(type, "cpu") != 0)
 		return 0;
 
+	prop = (u32 *)of_get_flat_dt_prop(node, "ibm,vrma-page-sizes", &size);
+	if (prop != NULL) {
+		DBG("VRMA Page size from device-tree:\n");
+		ppc64_vrma_page_shift = prop[0];
+		have_vrma = 1;
+	}
+
 	prop = (u32 *)of_get_flat_dt_prop(node,
 					  "ibm,segment-page-sizes", &size);
 	if (prop != NULL) {
diff -Naurp linux-2.6.22-rc2/include/asm-powerpc/page_64.h linux-2.6.22-rc2-vrma/include/asm-powerpc/page_64.h
--- linux-2.6.22-rc2/include/asm-powerpc/page_64.h	2007-05-19 09:36:17.000000000 +0530
+++ linux-2.6.22-rc2-vrma/include/asm-powerpc/page_64.h	2007-05-23 11:25:27.000000000 +0530
@@ -76,6 +76,10 @@ static inline void copy_page(void *to, v
 /* Log 2 of page table size */
 extern u64 ppc64_pft_size;
 
+/* For VRMA */
+extern u64 ppc64_vrma_page_shift;
+extern int have_vrma;
+
 /* Large pages size */
 #ifdef CONFIG_HUGETLB_PAGE
 extern unsigned int HPAGE_SHIFT;

^ permalink raw reply	[flat|nested] 2+ messages in thread
* [Patch 0/2] Kexec/Kdump support POWER6
@ 2007-05-22 12:22 Sachin P. Sant
  2007-05-22 12:24 ` [Patch 1/2] " Sachin P. Sant
  0 siblings, 1 reply; 2+ messages in thread
From: Sachin P. Sant @ 2007-05-22 12:22 UTC (permalink / raw)
  To: linuxppc-dev; +Cc: Milton Miller II, ellerman

Here are a set of patches which adds kdump support for Power6.

The first patch reads VRMA page size from device tree.

Second patch adds Kexec/Kdump support for Power6 processor. 
On Power machines supporting VRMA, Kexec/Kdump does not work.
Hypervisor stores VRMA mapping used by the OS, in the hpte 
hash tables. This patch makes sure these hpte entries are 
left untouched.

Comments are welcome.

Thanks
-Sachin

Signed-off-by : Sachin Sant <sachinp@in.ibm.com>
Signed-off-by : Mohan Kumar M <mohan@in.ibm.com>
---

^ permalink raw reply	[flat|nested] 2+ messages in thread
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2007-05-23  9:34 [Patch 1/2] Kexec/Kdump support POWER6 Sachin P. Sant
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2007-05-22 12:22 [Patch 0/2] " Sachin P. Sant
2007-05-22 12:24 ` [Patch 1/2] " Sachin P. Sant

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