linux-kernel - [PATCH 12/18] powerpc 44x: Handle TLB miss regardless of endianness

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Fri,  1 Oct 2010 17:06:05 +1000
From:	"Ian Munsie" <imunsie@....ibm.com>
To:	linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
	benh@...nel.crashing.org
Cc:	paulus@...ba.org, Ian Munsie <imunsie@....ibm.com>,
	Dave Kleikamp <shaggy@...ux.vnet.ibm.com>,
	Josh Boyer <jwboyer@...ux.vnet.ibm.com>,
	Torez Smith <lnxtorez@...ux.vnet.ibm.com>
Subject: [PATCH 12/18] powerpc 44x: Handle TLB miss regardless of endianness

From: Ian Munsie <imunsie@....ibm.com>

On the 44x we use 64bit page table entries, but the CPU is only 32bit.
When a PTE is loaded during a TLB miss each half is loaded into
different registers, so we need to reverse the offsets if the CPU is
running in little endian mode.

Signed-off-by: Ian Munsie <imunsie@....ibm.com>
---
 arch/powerpc/kernel/head_44x.S |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/powerpc/kernel/head_44x.S b/arch/powerpc/kernel/head_44x.S
index 6198733..d4c144f 100644
--- a/arch/powerpc/kernel/head_44x.S
+++ b/arch/powerpc/kernel/head_44x.S
@@ -258,8 +258,8 @@ interrupt_base:
 
 	/* Compute pte address */
 	rlwimi  r12, r10, PPC44x_PTE_ADD_SHIFT, PPC44x_PTE_ADD_MASK_BIT, 28
-	lwz	r11, 0(r12)		/* Get high word of pte entry */
-	lwz	r12, 4(r12)		/* Get low word of pte entry */
+	lwz	r11, p64h(r12)		/* Get high word of pte entry */
+	lwz	r12, p64l(r12)		/* Get low word of pte entry */
 
 	lis	r10,tlb_44x_index@ha
 
@@ -354,8 +354,8 @@ tlb_44x_patch_hwater_D:
 
 	/* Compute pte address */
 	rlwimi	r12, r10, PPC44x_PTE_ADD_SHIFT, PPC44x_PTE_ADD_MASK_BIT, 28
-	lwz	r11, 0(r12)		/* Get high word of pte entry */
-	lwz	r12, 4(r12)		/* Get low word of pte entry */
+	lwz	r11, p64h(r12)		/* Get high word of pte entry */
+	lwz	r12, p64l(r12)		/* Get low word of pte entry */
 
 	lis	r10,tlb_44x_index@ha
 
-- 
1.7.1

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/