• Ard Biesheuvel's avatar
    KVM: arm/arm64: Reduce verbosity of KVM init log · 76600428
    Ard Biesheuvel authored
    On my GICv3 system, the following is printed to the kernel log at boot:
    
       kvm [1]: 8-bit VMID
       kvm [1]: IDMAP page: d20e35000
       kvm [1]: HYP VA range: 800000000000:ffffffffffff
       kvm [1]: vgic-v2@2c020000
       kvm [1]: GIC system register CPU interface enabled
       kvm [1]: vgic interrupt IRQ1
       kvm [1]: virtual timer IRQ4
       kvm [1]: Hyp mode initialized successfully
    
    The KVM IDMAP is a mapping of a statically allocated kernel structure,
    and so printing its physical address leaks the physical placement of
    the kernel when physical KASLR in effect. So change the kvm_info() to
    kvm_debug() to remove it from the log output.
    
    While at it, trim the output a bit more: IRQ numbers can be found in
    /proc/interrupts, and the HYP VA and vgic-v2 lines are not highly
    informational either.
    
    Cc: <stable@vger.kernel.org>
    Acked-by: default avatarWill Deacon <will.deacon@arm.com>
    Acked-by: default avatarChristoffer Dall <cdall@kernel.org>
    Signed-off-by: default avatarArd Biesheuvel <ard.biesheuvel@linaro.org>
    Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
    76600428
mmu.c 53.9 KB