This is a note to let you know that I've just added the patch titled powerpc/mm/hash: Always clear UPRT and Host Radix bits when setting up CPU to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: powerpc-mm-hash-always-clear-uprt-and-host-radix-bits-when-setting-up-cpu.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From fda2d27db6eae5c2468f9e4657539b72bbc238bb Mon Sep 17 00:00:00 2001 From: "Aneesh Kumar K.V" <aneesh.kumar@xxxxxxxxxxxxxxxxxx> Date: Wed, 22 Feb 2017 10:42:02 +0530 Subject: powerpc/mm/hash: Always clear UPRT and Host Radix bits when setting up CPU From: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxxxxxxx> commit fda2d27db6eae5c2468f9e4657539b72bbc238bb upstream. We will set LPCR with correct value for radix during int. This make sure we start with a sanitized value of LPCR. In case of kexec, cpus can have LPCR value based on the previous translation mode we were running. Fixes: fe036a0605d60 ("powerpc/64/kexec: Fix MMU cleanup on radix") Acked-by: Michael Neuling <mikey@xxxxxxxxxxx> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxxxxxxx> Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- arch/powerpc/kernel/cpu_setup_power.S | 4 ++++ 1 file changed, 4 insertions(+) --- a/arch/powerpc/kernel/cpu_setup_power.S +++ b/arch/powerpc/kernel/cpu_setup_power.S @@ -100,6 +100,8 @@ _GLOBAL(__setup_cpu_power9) mfspr r3,SPRN_LPCR LOAD_REG_IMMEDIATE(r4, LPCR_PECEDH | LPCR_PECE_HVEE | LPCR_HVICE) or r3, r3, r4 + LOAD_REG_IMMEDIATE(r4, LPCR_UPRT | LPCR_HR) + andc r3, r3, r4 bl __init_LPCR bl __init_HFSCR bl __init_tlb_power9 @@ -120,6 +122,8 @@ _GLOBAL(__restore_cpu_power9) mfspr r3,SPRN_LPCR LOAD_REG_IMMEDIATE(r4, LPCR_PECEDH | LPCR_PECE_HVEE | LPCR_HVICE) or r3, r3, r4 + LOAD_REG_IMMEDIATE(r4, LPCR_UPRT | LPCR_HR) + andc r3, r3, r4 bl __init_LPCR bl __init_HFSCR bl __init_tlb_power9 Patches currently in stable-queue which might be from aneesh.kumar@xxxxxxxxxxxxxxxxxx are queue-4.9/powerpc-mm-add-mmu_ftr_kernel_ro-to-possible-feature-mask.patch queue-4.9/powerpc-mm-hash-always-clear-uprt-and-host-radix-bits-when-setting-up-cpu.patch