On 2021-03-10 11:23, Anshuman Khandual wrote: > From: James Morse <james.morse@xxxxxxx> > > 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@xxxxxxx> > Cc: Will Deacon <will@xxxxxxxxxx> > Cc: Marc Zyngier <maz@xxxxxxxxxx> > Cc: James Morse <james.morse@xxxxxxx> > Cc: Suzuki K Poulose <suzuki.poulose@xxxxxxx> > Cc: Ard Biesheuvel <ardb@xxxxxxxxxx> > Cc: Mark Rutland <mark.rutland@xxxxxxx> > Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx > Cc: kvmarm@xxxxxxxxxxxxxxxxxxxxx > Cc: linux-efi@xxxxxxxxxxxxxxx > Cc: linux-kernel@xxxxxxxxxxxxxxx > Acked-by: Marc Zyngier <maz@xxxxxxxxxx> > Signed-off-by: James Morse <james.morse@xxxxxxx> > Signed-off-by: Anshuman Khandual <anshuman.khandual@xxxxxxx> 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
