Messages in this thread | | | Date | Fri, 26 Aug 2022 14:00:20 +0200 | From | Anders Roxell <> | Subject | Re: [PATCH V2] arm64/mm: Fix __enable_mmu() for new TGRAN range values |
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On 2021-03-10 11:23, Anshuman Khandual wrote: > From: James Morse <james.morse@arm.com> > > As per ARM ARM DDI 0487G.a, when FEAT_LPA2 is implemented, ID_AA64MMFR0_EL1 > might contain a range of values to describe supported translation granules > (4K and 16K pages sizes in particular) instead of just enabled or disabled > values. This changes __enable_mmu() function to handle complete acceptable > range of values (depending on whether the field is signed or unsigned) now > represented with ID_AA64MMFR0_TGRAN_SUPPORTED_[MIN..MAX] pair. While here, > also fix similar situations in EFI stub and KVM as well. > > Cc: Catalin Marinas <catalin.marinas@arm.com> > Cc: Will Deacon <will@kernel.org> > Cc: Marc Zyngier <maz@kernel.org> > Cc: James Morse <james.morse@arm.com> > Cc: Suzuki K Poulose <suzuki.poulose@arm.com> > Cc: Ard Biesheuvel <ardb@kernel.org> > Cc: Mark Rutland <mark.rutland@arm.com> > Cc: linux-arm-kernel@lists.infradead.org > Cc: kvmarm@lists.cs.columbia.edu > Cc: linux-efi@vger.kernel.org > Cc: linux-kernel@vger.kernel.org > Acked-by: Marc Zyngier <maz@kernel.org> > Signed-off-by: James Morse <james.morse@arm.com> > Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Hi,
When building an arm64 defconfig kernel from stable/linux-5.10.y and booting that in QEMU (version: 1:7.0+dfsg-2~bpo11+2) with '-cpu max' the kernel doesn't boot. I don't get any output. The kernel boots fine if I change to '-cpu cortex-a72'.
If I cherry-pick this patch to stable/linux-5.10.y I'm able too boot the kernel with '-cpu max'.
However, I'm not comfortable to backport this patch to older kernels since there are a lot of conflicts. Can someone help out to do the packport?
Cheers, Anders
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