From: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
To: benh@kernel.crashing.org, paulus@samba.org,
michael@ellerman.id.au, anton@samba.org
Cc: linuxppc-dev@lists.ozlabs.org
Subject: Re: [Early RFC 0/6] arch/powerpc: Add 64TB support to ppc64
Date: Fri, 01 Jun 2012 01:28:45 +0530 [thread overview]
Message-ID: <874nqwyvey.fsf@skywalker.in.ibm.com> (raw)
In-Reply-To: <1338493841-9926-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com>
"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com> writes:
> Hi,
>
> This patchset include preparatory patches for supporting 64TB with ppc64. I haven't
> completed the actual patch that bump the USER_ESID bits. I wanted the share the
> changes early so that I can get feedback on the approach. The changes itself
> contains few FIXME!! which I will be addressing in the later updates.
>
Here is the patch that update USER_ESID_BITS. I get a machine check
exception with this changes. That is why I didn't include this in the patch
series.
commit 5fff8ff606bc136c510350a40528431196f60001
Author: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Date: Wed May 23 16:59:36 2012 +0530
arch/powerpc: Add 64TB support
Increase max addressable range to 64TB. This is not tested on
real hardware yet.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
diff --git a/arch/powerpc/include/asm/mmu-hash64.h b/arch/powerpc/include/asm/mmu-hash64.h
index 0f8b10d..9f9a2a1 100644
--- a/arch/powerpc/include/asm/mmu-hash64.h
+++ b/arch/powerpc/include/asm/mmu-hash64.h
@@ -375,8 +375,8 @@ extern void slb_set_size(u16 size);
#define VSID_MODULUS_1T ((1UL<<VSID_BITS_1T)-1)
#define CONTEXT_BITS 19
-#define USER_ESID_BITS 16
-#define USER_ESID_BITS_1T 4
+#define USER_ESID_BITS 18
+#define USER_ESID_BITS_1T 6
#define USER_VSID_RANGE (1UL << (USER_ESID_BITS + SID_SHIFT))
diff --git a/arch/powerpc/include/asm/pgtable-ppc64-4k.h b/arch/powerpc/include/asm/pgtable-ppc64-4k.h
index 6eefdcf..b3eccf2 100644
--- a/arch/powerpc/include/asm/pgtable-ppc64-4k.h
+++ b/arch/powerpc/include/asm/pgtable-ppc64-4k.h
@@ -7,7 +7,7 @@
*/
#define PTE_INDEX_SIZE 9
#define PMD_INDEX_SIZE 7
-#define PUD_INDEX_SIZE 7
+#define PUD_INDEX_SIZE 9
#define PGD_INDEX_SIZE 9
#ifndef __ASSEMBLY__
diff --git a/arch/powerpc/include/asm/pgtable-ppc64-64k.h b/arch/powerpc/include/asm/pgtable-ppc64-64k.h
index 90533dd..be4e287 100644
--- a/arch/powerpc/include/asm/pgtable-ppc64-64k.h
+++ b/arch/powerpc/include/asm/pgtable-ppc64-64k.h
@@ -7,7 +7,7 @@
#define PTE_INDEX_SIZE 12
#define PMD_INDEX_SIZE 12
#define PUD_INDEX_SIZE 0
-#define PGD_INDEX_SIZE 4
+#define PGD_INDEX_SIZE 6
#ifndef __ASSEMBLY__
#define PTE_TABLE_SIZE (sizeof(real_pte_t) << PTE_INDEX_SIZE)
diff --git a/arch/powerpc/include/asm/processor.h b/arch/powerpc/include/asm/processor.h
index 8e2d037..426ed13 100644
--- a/arch/powerpc/include/asm/processor.h
+++ b/arch/powerpc/include/asm/processor.h
@@ -100,8 +100,8 @@ extern struct task_struct *last_task_used_spe;
#endif
#ifdef CONFIG_PPC64
-/* 64-bit user address space is 44-bits (16TB user VM) */
-#define TASK_SIZE_USER64 (0x0000100000000000UL)
+/* 64-bit user address space is 46-bits (64TB user VM) */
+#define TASK_SIZE_USER64 (0x0000400000000000UL)
/*
* 32-bit user address space is 4GB - 1 page
diff --git a/arch/powerpc/include/asm/sparsemem.h b/arch/powerpc/include/asm/sparsemem.h
index 0c5fa31..f6fc0ee 100644
--- a/arch/powerpc/include/asm/sparsemem.h
+++ b/arch/powerpc/include/asm/sparsemem.h
@@ -10,8 +10,8 @@
*/
#define SECTION_SIZE_BITS 24
-#define MAX_PHYSADDR_BITS 44
-#define MAX_PHYSMEM_BITS 44
+#define MAX_PHYSADDR_BITS 46
+#define MAX_PHYSMEM_BITS 46
#endif /* CONFIG_SPARSEMEM */
prev parent reply other threads:[~2012-05-31 19:58 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-31 19:50 [Early RFC 0/6] arch/powerpc: Add 64TB support to ppc64 Aneesh Kumar K.V
2012-05-31 19:50 ` [Early RFC 1/6] arch/powerpc: Use hpt_va to compute virtual address Aneesh Kumar K.V
2012-05-31 19:50 ` [Early RFC 2/6] arch/powerpc: Convert virtual address to a struct Aneesh Kumar K.V
2012-05-31 19:50 ` [Early RFC 3/6] arch/powerpc: Simplify hpte_decode Aneesh Kumar K.V
2012-05-31 19:50 ` [Early RFC 4/6] arch/powerpc: Use vsid and segment offset to represent virtual address Aneesh Kumar K.V
2012-05-31 19:50 ` [Early RFC 5/6] arch/powerpc: Make KERN_VIRT_SIZE not dependend on PGTABLE_RANGE Aneesh Kumar K.V
2012-05-31 19:50 ` [Early RFC 6/6] arch/powerpc: Increase the slice range to 64TB Aneesh Kumar K.V
2012-05-31 19:58 ` Aneesh Kumar K.V [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=874nqwyvey.fsf@skywalker.in.ibm.com \
--to=aneesh.kumar@linux.vnet.ibm.com \
--cc=anton@samba.org \
--cc=benh@kernel.crashing.org \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=michael@ellerman.id.au \
--cc=paulus@samba.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).