All of lore.kernel.org
 help / color / mirror / Atom feed
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


WARNING: multiple messages have this Message-ID (diff)
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

             reply	other threads:[~2012-12-12  2:08 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

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=1355276466-18295-1-git-send-email-arve@android.com \
    --to=arve@android.com \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=r.sricharan@ti.com \
    --cc=rmk+kernel@arm.linux.org.uk \
    --cc=santosh.shilimkar@ti.com \
    /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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.