From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 83C91C433F5 for ; Tue, 12 Oct 2021 13:18:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 656E5603E8 for ; Tue, 12 Oct 2021 13:18:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236817AbhJLNUY (ORCPT ); Tue, 12 Oct 2021 09:20:24 -0400 Received: from foss.arm.com ([217.140.110.172]:41714 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236695AbhJLNUT (ORCPT ); Tue, 12 Oct 2021 09:20:19 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 9DB3EED1; Tue, 12 Oct 2021 06:18:17 -0700 (PDT) Received: from ewhatever.cambridge.arm.com (ewhatever.cambridge.arm.com [10.1.197.1]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 33AF73F70D; Tue, 12 Oct 2021 06:18:16 -0700 (PDT) From: Suzuki K Poulose To: will@kernel.org, mathieu.poirier@linaro.org Cc: catalin.marinas@arm.com, anshuman.khandual@arm.com, mike.leach@linaro.org, leo.yan@linaro.org, maz@kernel.org, coresight@lists.linaro.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Suzuki K Poulose Subject: [PATCH v4 06/15] coresight: trbe: Add a helper to pad a given buffer area Date: Tue, 12 Oct 2021 14:17:34 +0100 Message-Id: <20211012131743.2040596-7-suzuki.poulose@arm.com> X-Mailer: git-send-email 2.25.4 In-Reply-To: <20211012131743.2040596-1-suzuki.poulose@arm.com> References: <20211012131743.2040596-1-suzuki.poulose@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Refactor the helper to pad a given AUX buffer area to allow "filling" ignore packets, without moving any handle pointers. This will be useful in working around errata, where we may have to fill the buffer after a session. Cc: Mathieu Poirier Cc: Mike Leach Cc: Leo Yan Reviewed-by: Anshuman Khandual Reviewed-by: Mathieu Poirier Signed-off-by: Suzuki K Poulose --- drivers/hwtracing/coresight/coresight-trbe.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/hwtracing/coresight/coresight-trbe.c b/drivers/hwtracing/coresight/coresight-trbe.c index 5902ef41bfb8..3de03136285f 100644 --- a/drivers/hwtracing/coresight/coresight-trbe.c +++ b/drivers/hwtracing/coresight/coresight-trbe.c @@ -199,12 +199,18 @@ static void trbe_stop_and_truncate_event(struct perf_output_handle *handle) * consumed from the user space. The enabled TRBE buffer area is a moving subset of * the allocated perf auxiliary buffer. */ + +static void __trbe_pad_buf(struct trbe_buf *buf, u64 offset, int len) +{ + memset((void *)buf->trbe_base + offset, ETE_IGNORE_PACKET, len); +} + static void trbe_pad_buf(struct perf_output_handle *handle, int len) { struct trbe_buf *buf = etm_perf_sink_config(handle); u64 head = PERF_IDX2OFF(handle->head, buf); - memset((void *)buf->trbe_base + head, ETE_IGNORE_PACKET, len); + __trbe_pad_buf(buf, head, len); if (!buf->snapshot) perf_aux_output_skip(handle, len); } -- 2.25.4