From: santosh.shilimkar@ti.com (Santosh Shilimkar)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 5/8] ARM: mm: Add __pv_stub_mov to patch MOV instruction
Date: Fri, 21 Jun 2013 19:48:19 -0400 [thread overview]
Message-ID: <1371858502-10083-6-git-send-email-santosh.shilimkar@ti.com> (raw)
In-Reply-To: <1371858502-10083-1-git-send-email-santosh.shilimkar@ti.com>
From: Sricharan R <r.sricharan@ti.com>
Patch adds stub for MOV instruction. This is preparatory patch to
add the subsequent 64 bit patching which will use MOV stub.
For review simplicity the patch is kept as a separate change
Signed-off-by: Sricharan R <r.sricharan@ti.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
---
arch/arm/include/asm/memory.h | 10 ++++++++++
arch/arm/kernel/head.S | 2 ++
arch/arm/kernel/vmlinux.lds.S | 5 +++++
3 files changed, 17 insertions(+)
diff --git a/arch/arm/include/asm/memory.h b/arch/arm/include/asm/memory.h
index 3d4f79c..d8a3ea6 100644
--- a/arch/arm/include/asm/memory.h
+++ b/arch/arm/include/asm/memory.h
@@ -172,6 +172,7 @@
* so that all we need to do is modify the 8-bit constant field.
*/
#define __PV_BITS_31_24 0x81000000
+#define __PV_BITS_7_0 0x81
extern phys_addr_t (*arch_virt_to_idmap) (unsigned long x);
extern unsigned long __pv_phys_offset;
@@ -188,6 +189,15 @@ extern unsigned long __pv_offset;
: "=r" (to) \
: "r" (from), "I" (type))
+#define __pv_stub_mov(to, instr, type) \
+ __asm__ volatile("@ __pv_stub_mov\n" \
+ "1: " instr " %R0, %1\n" \
+ " .pushsection .pv_high_table,\"a\"\n" \
+ " .long 1b\n" \
+ " .popsection\n" \
+ : "=r" (to) \
+ : "I" (type))
+
static inline phys_addr_t __virt_to_phys(unsigned long x)
{
unsigned long t;
diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S
index 764e83b..b1bdeb5 100644
--- a/arch/arm/kernel/head.S
+++ b/arch/arm/kernel/head.S
@@ -565,6 +565,8 @@ ENDPROC(__fixup_pv_table)
.long __pv_table_begin
.long __pv_table_end
2: .long __pv_phys_offset
+3: .long __pv_high_table_begin
+ .long __pv_high_table_end
.text
__fixup_a_pv_table:
diff --git a/arch/arm/kernel/vmlinux.lds.S b/arch/arm/kernel/vmlinux.lds.S
index a871b8e..cf17c7b 100644
--- a/arch/arm/kernel/vmlinux.lds.S
+++ b/arch/arm/kernel/vmlinux.lds.S
@@ -182,6 +182,11 @@ SECTIONS
*(.pv_table)
__pv_table_end = .;
}
+ .init.pv_high_table : {
+ __pv_high_table_begin = .;
+ *(.pv_high_table)
+ __pv_high_table_end = .;
+ }
.init.data : {
#ifndef CONFIG_XIP_KERNEL
INIT_DATA
--
1.7.9.5
next prev parent reply other threads:[~2013-06-21 23:48 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-21 23:48 [PATCH 0/8] ARM: mm: Extend the runtime patch stub for PAE systems Santosh Shilimkar
2013-06-21 23:48 ` [PATCH 1/8] ARM: mm: LPAE: use phys_addr_t appropriately in p2v and v2p conversions Santosh Shilimkar
2013-07-22 15:03 ` Nicolas Pitre
2013-06-21 23:48 ` [PATCH 2/8] ARM: mm: Introduce virt_to_idmap() with an arch hook Santosh Shilimkar
2013-06-21 23:48 ` [PATCH 3/8] ARM: mm: Move the idmap print to appropriate place in the code Santosh Shilimkar
2013-06-21 23:48 ` [PATCH 4/8] ARM: mm: Pass the constant as an argument to fixup_pv_table() Santosh Shilimkar
2013-06-21 23:48 ` Santosh Shilimkar [this message]
2013-06-21 23:48 ` [PATCH 6/8] ARM: mm: LPAE: Correct virt_to_phys patching for 64 bit physical addresses Santosh Shilimkar
2013-07-24 1:10 ` Nicolas Pitre
2013-07-24 2:01 ` Santosh Shilimkar
2013-07-24 2:49 ` Nicolas Pitre
2013-07-24 11:50 ` Sricharan R
2013-07-24 12:07 ` Sricharan R
2013-07-24 14:04 ` Santosh Shilimkar
2013-07-24 20:21 ` Nicolas Pitre
2013-07-25 3:49 ` Sricharan R
2013-07-25 18:53 ` Santosh Shilimkar
2013-06-21 23:48 ` [PATCH 7/8] ARM: mm: Recreate kernel mappings in early_paging_init() Santosh Shilimkar
2013-06-21 23:48 ` [PATCH 8/8] ARM: keystone: Switch over to high physical address range Santosh Shilimkar
2013-06-22 1:51 ` [PATCH 0/8] ARM: mm: Extend the runtime patch stub for PAE systems Nicolas Pitre
2013-06-22 2:17 ` Santosh Shilimkar
2013-07-16 18:42 ` Santosh Shilimkar
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