From mboxrd@z Thu Jan 1 00:00:00 1970 From: vladimir.murzin@arm.com (Vladimir Murzin) Date: Tue, 29 Sep 2015 13:17:29 +0100 Subject: [PATCH 16/22] arm64/debug: Make use of the system wide safe value In-Reply-To: <1442413280-31885-17-git-send-email-suzuki.poulose@arm.com> References: <1442413280-31885-1-git-send-email-suzuki.poulose@arm.com> <1442413280-31885-17-git-send-email-suzuki.poulose@arm.com> Message-ID: <560A8159.8000300@arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On 16/09/15 15:21, Suzuki K. Poulose wrote: > From: "Suzuki K. Poulose" > > Use the system wide value of ID_AA64DFR0 to make safer decisions > > Signed-off-by: Suzuki K. Poulose > --- > 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 Vladimir