From: arve@android.com (Arve Hjønnevåg)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] ARM: decompressor: Flush tlb before swiching domain 0 to client mode
Date: Tue, 11 Dec 2012 17:41:04 -0800 [thread overview]
Message-ID: <1355276466-18295-1-git-send-email-arve@android.com> (raw)
If the bootloader used a page table that is incompatible with domain 0
in client mode, then swithing domain 0 to client mode causes a fault
if we don't flush the tlb after updating the page table pointer.
Signed-off-by: Arve Hj?nnev?g <arve@android.com>
---
arch/arm/boot/compressed/head.S | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/arch/arm/boot/compressed/head.S b/arch/arm/boot/compressed/head.S
index 90275f0..9c8034c 100644
--- a/arch/arm/boot/compressed/head.S
+++ b/arch/arm/boot/compressed/head.S
@@ -704,6 +704,7 @@ __armv7_mmu_cache_on:
bic r6, r6, #1 << 31 @ 32-bit translation system
bic r6, r6, #3 << 0 @ use only ttbr0
mcrne p15, 0, r3, c2, c0, 0 @ load page table pointer
+ mcrne p15, 0, r0, c8, c7, 0 @ flush I,D TLBs
mcrne p15, 0, r1, c3, c0, 0 @ load domain access control
mcrne p15, 0, r6, c2, c0, 2 @ load ttb control
#endif
--
1.7.7.3
WARNING: multiple messages have this Message-ID (diff)
From: "Arve Hjønnevåg" <arve@android.com>
To: linux-kernel@vger.kernel.org
Cc: r.sricharan@ti.com, santosh.shilimkar@ti.com,
rmk+kernel@arm.linux.org.uk, "Arve Hjønnevåg" <arve@android.com>,
linux-arm-kernel@lists.infradead.org (moderated list:ARM PORT)
Subject: [PATCH] ARM: decompressor: Flush tlb before swiching domain 0 to client mode
Date: Tue, 11 Dec 2012 17:41:04 -0800 [thread overview]
Message-ID: <1355276466-18295-1-git-send-email-arve@android.com> (raw)
If the bootloader used a page table that is incompatible with domain 0
in client mode, then swithing domain 0 to client mode causes a fault
if we don't flush the tlb after updating the page table pointer.
Signed-off-by: Arve Hjønnevåg <arve@android.com>
---
arch/arm/boot/compressed/head.S | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/arch/arm/boot/compressed/head.S b/arch/arm/boot/compressed/head.S
index 90275f0..9c8034c 100644
--- a/arch/arm/boot/compressed/head.S
+++ b/arch/arm/boot/compressed/head.S
@@ -704,6 +704,7 @@ __armv7_mmu_cache_on:
bic r6, r6, #1 << 31 @ 32-bit translation system
bic r6, r6, #3 << 0 @ use only ttbr0
mcrne p15, 0, r3, c2, c0, 0 @ load page table pointer
+ mcrne p15, 0, r0, c8, c7, 0 @ flush I,D TLBs
mcrne p15, 0, r1, c3, c0, 0 @ load domain access control
mcrne p15, 0, r6, c2, c0, 2 @ load ttb control
#endif
--
1.7.7.3
next reply other threads:[~2012-12-12 1:41 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-12 1:41 Arve Hjønnevåg [this message]
2012-12-12 1:41 ` [PATCH] ARM: decompressor: Flush tlb before swiching domain 0 to client mode Arve Hjønnevåg
2012-12-12 10:10 ` Santosh Shilimkar
2012-12-12 10:10 ` Santosh Shilimkar
2012-12-12 22:27 ` Arve Hjønnevåg
2012-12-12 22:27 ` Arve Hjønnevåg
2012-12-12 22:46 ` Santosh Shilimkar
2012-12-12 22:46 ` Santosh Shilimkar
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