[PATCH] KVM: arm/arm64: reduce verbosity of KVM init log
Will Deacon
will.deacon at arm.com
Fri Mar 2 01:36:28 PST 2018
On Fri, Mar 02, 2018 at 08:16:30AM +0000, Ard Biesheuvel wrote:
> 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 at 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 at vger.kernel.org>
> Signed-off-by: Ard Biesheuvel <ard.biesheuvel at linaro.org>
> ---
> virt/kvm/arm/arch_timer.c | 2 +-
> virt/kvm/arm/mmu.c | 6 +++---
> virt/kvm/arm/vgic/vgic-init.c | 2 +-
> virt/kvm/arm/vgic/vgic-v2.c | 2 +-
> 4 files changed, 6 insertions(+), 6 deletions(-)
Acked-by: Will Deacon <will.deacon at arm.com>
Will
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