Re: [PATCH 16/22] arm64/debug: Make use of the system wide safe value

[Suzuki K. Poulose]

On 29/09/15 13:17, Vladimir Murzin wrote:
> On 16/09/15 15:21, Suzuki K. Poulose wrote:
> > From: "Suzuki K. Poulose" <suzuki.poulose@xxxxxxx>
> >
> > Use the system wide value of ID_AA64DFR0 to make safer decisions
> >
> > Signed-off-by: Suzuki K. Poulose <suzuki.poulose@xxxxxxx>
> > ---
> >   arch/arm64/include/asm/hw_breakpoint.h |   14 ++------------
> >   arch/arm64/kernel/debug-monitors.c     |    6 ++++--
> >   arch/arm64/kernel/hw_breakpoint.c      |   19 ++++++++++++++++++-
> >   3 files changed, 24 insertions(+), 15 deletions(-)
>
> Looks like this patch introduces build-time regression if
> CONFIG_PERF_EVENTS is not set:
>
> > arch/arm64/kvm/built-in.o: In function `kvm_arm_setup_debug':
> > /work/tools/linux/arch/arm64/kvm/debug.c:173: undefined reference to `get_num_brps'
> > /work/tools/linux/arch/arm64/kvm/debug.c:177: undefined reference to `get_num_wrps'
> > arch/arm64/kvm/built-in.o: In function `kvm_arm_clear_debug':
> > /work/tools/linux/arch/arm64/kvm/debug.c:208: undefined reference to `get_num_brps'
> > /work/tools/linux/arch/arm64/kvm/debug.c:212: undefined reference to `get_num_wrps'
> > arch/arm64/kvm/built-in.o: In function `kvm_arch_dev_ioctl_check_extension':
> > /work/tools/linux/arch/arm64/kvm/reset.c:78: undefined reference to `get_num_wrps'
> > /work/tools/linux/arch/arm64/kvm/reset.c:75: undefined reference to `get_num_brps'
> > make: *** [vmlinux] Error 1

The fixed series is available here :

git://linux-arm.org/linux-skp.git cpu-ftr/v1.1-4.3-rc3


I will wait for some more comments/review before I sent the updated
version to the list.

Thanks
Suzuki

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