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 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756227AbbI2MRu (ORCPT ); Tue, 29 Sep 2015 08:17:50 -0400 Received: from eu-smtp-delivery-143.mimecast.com ([146.101.78.143]:20153 "EHLO eu-smtp-delivery-143.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753269AbbI2MRj convert rfc822-to-8bit (ORCPT ); Tue, 29 Sep 2015 08:17:39 -0400 Message-ID: <560A8159.8000300@arm.com> Date: Tue, 29 Sep 2015 13:17:29 +0100 From: Vladimir Murzin User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.2.0 MIME-Version: 1.0 To: "Suzuki K. Poulose" , "linux-arm-kernel@lists.infradead.org" CC: Mark Rutland , "ard.biesheuvel@linaro.org" , "aph@redhat.com" , Catalin Marinas , Will Deacon , "linux-kernel@vger.kernel.org" , "edward.nevill@linaro.org" , Andre Przywara , Marc Zyngier , Dave P Martin Subject: Re: [PATCH 16/22] arm64/debug: Make use of the system wide safe value References: <1442413280-31885-1-git-send-email-suzuki.poulose@arm.com> <1442413280-31885-17-git-send-email-suzuki.poulose@arm.com> In-Reply-To: <1442413280-31885-17-git-send-email-suzuki.poulose@arm.com> X-OriginalArrivalTime: 29 Sep 2015 12:17:34.0513 (UTC) FILETIME=[D26A8A10:01D0FAB0] X-MC-Unique: JYnInRRWQxCB0NbavMjrdQ-1 Content-Type: text/plain; charset=WINDOWS-1252 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.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