From mboxrd@z Thu Jan 1 00:00:00 1970 From: sboyd@codeaurora.org (Stephen Boyd) Date: Mon, 3 Jun 2013 17:35:25 -0700 Subject: [RFC PATCH] ARM: update legacy CPU ID in decompressor cache support jump table In-Reply-To: References: Message-ID: <20130604003525.GI599@codeaurora.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On 06/03, Marc C wrote: > Hello, > > The following is a formal RFC PATCH for the suggestion offered by rmk > in this thread: > http://lists.infradead.org/pipermail/linux-arm-kernel/2010-January/007871.html > > The previous mask values for the legacy ARM CPU IDs were conflicting > with the CPU ID assignments for late-generation CPUs (like the > Qualcomm MSM/QSD or Broadcom Brahma-15 processors). This change > corrects the legacy ARM CPU ID value so that the jump table can > fall-through to the appropriate cache maintenance / MMU functions. > > To: linux-arm-kernel at lists.infradead.org > Signed-off-by: Marc Carino > --- > arch/arm/boot/compressed/head.S | 4 ++-- > 1 files changed, 2 insertions(+), 2 deletions(-) > > diff --git a/arch/arm/boot/compressed/head.S b/arch/arm/boot/compressed/head.S > index fe4d9c3..a1b9e83 100644 > --- a/arch/arm/boot/compressed/head.S > +++ b/arch/arm/boot/compressed/head.S > @@ -805,8 +805,8 @@ call_cache_fn: adr r12, proc_types > .align 2 > .type proc_types,#object > proc_types: > - .word 0x00000000 @ old ARM ID > - .word 0x0000f000 > + .word 0x41000000 @ old ARM ID > + .word 0xff00f000 > mov pc, lr > THUMB( nop ) > mov pc, lr I sent a similar patch and Russell just applied it[1]. It removes this entry on V7 builds. Your patch will also work for me. [1] http://www.arm.linux.org.uk/developer/patches/viewpatch.php?id=7736/1 -- Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation