From patchwork Mon Nov 20 13:21:11 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bartosz Golaszewski X-Patchwork-Id: 745442 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bgdev-pl.20230601.gappssmtp.com header.i=@bgdev-pl.20230601.gappssmtp.com header.b="Po3/Amb7" Received: from mail-wm1-x329.google.com (mail-wm1-x329.google.com [IPv6:2a00:1450:4864:20::329]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 05938139 for ; Mon, 20 Nov 2023 05:21:31 -0800 (PST) Received: by mail-wm1-x329.google.com with SMTP id 5b1f17b1804b1-4083f61312eso17949255e9.3 for ; Mon, 20 Nov 2023 05:21:30 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bgdev-pl.20230601.gappssmtp.com; s=20230601; t=1700486489; x=1701091289; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=Xqz1VK0mYS8f9CyDoxvSzBDgulCTNu27LF81cKbiT0w=; b=Po3/Amb7v1NdnzU3tMQLlJeY7SmhfqjZ2Z+Omz2Bc0vfT1dNdthmh3earOgDyeupn7 n55oIsO8+cy90Bo8aCDtNMUqBtkf8nzI6R99ZUATe1s10MjMJpt7uhtgSK8u9qrgvW6N 2Jy9ZjHKj3inwTHS+2qSNlE1qbrv8NpOsl4jDpDzSs5fn5aoOcGuDhrwIux5XX6t6hWB nvHeRSS4QAjnwgWEVkD/vWOMYDHM9+UJBnc/Vh/lc4OpgenhOfdifere5CeIcrJhGj5m ENGVfSODVTpozEp0uAclpwGjxgBRvoLMlHP+ELoboQ6IOEZeDXZ07B9emTfaNt4udKkF 1hUw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1700486489; x=1701091289; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=Xqz1VK0mYS8f9CyDoxvSzBDgulCTNu27LF81cKbiT0w=; b=mbMKQWuf4xdqgCWeOPilAOk/d3Huc4JQN2+8gx7sn3fULWgGtIRhoj8oE+Z1YR71MN NEGW3AL2e0WTtbTGpdxty1vLav74kowvq27h01H7Cry59MDMEUORRgpFztX0k/G1hmuR UppXNmizOxBR1gLx47hZuSqWs/B7uHabVe7pSvkgbJvuBidaWbqKdc8ORpAffCFyT+mf hH9ECTw+7jgB/NwjkIYvKlvNS64iNdgA+c2+emLG8r/lYuGgRoqvC7RqEPamwEGurve9 DksT9BfXGpegW4jb51jtPiEdIBjKQiDWYd37BwUMCM+agBGTMXiRPg3emP1sJwYoUxBd F1og== X-Gm-Message-State: AOJu0Yy/c60FdI1Chczky+05TikXr++QuvEQkitZoW54Q6Zd/TmPooZM LstyHDKc1N4xzc5J8PTQXIKJRg== X-Google-Smtp-Source: AGHT+IEHJG2PWRT7hWRMJXRn4DOeHbhS3nW6N5WgPprhwMyamnDq4Sm6+2fVU7uQp0iok0njT7QtbA== X-Received: by 2002:a05:600c:1994:b0:405:40ec:415d with SMTP id t20-20020a05600c199400b0040540ec415dmr6097795wmq.39.1700486489266; Mon, 20 Nov 2023 05:21:29 -0800 (PST) Received: from brgl-uxlite.home ([2a01:cb1d:334:ac00:c590:a7ce:883:eba3]) by smtp.gmail.com with ESMTPSA id k18-20020a05600c0b5200b004065e235417sm17329192wmr.21.2023.11.20.05.21.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 20 Nov 2023 05:21:28 -0800 (PST) From: Bartosz Golaszewski To: Andy Gross , Bjorn Andersson , Konrad Dybcio , Elliot Berman , Krzysztof Kozlowski , Guru Das Srinagesh , Andrew Halaney , Maximilian Luz , Alex Elder , Srini Kandagatla Cc: linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel@quicinc.com, Bartosz Golaszewski Subject: [RESEND PATCH v5 05/12] firmware: qcom: scm: make qcom_scm_ice_set_key() use the TZ allocator Date: Mon, 20 Nov 2023 14:21:11 +0100 Message-Id: <20231120132118.30473-6-brgl@bgdev.pl> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20231120132118.30473-1-brgl@bgdev.pl> References: <20231120132118.30473-1-brgl@bgdev.pl> Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Bartosz Golaszewski Let's use the new TZ memory allocator to obtain a buffer for this call instead of using dma_alloc_coherent(). Signed-off-by: Bartosz Golaszewski Reviewed-by: Andrew Halaney Tested-by: Andrew Halaney # sc8280xp-lenovo-thinkpad-x13s --- drivers/firmware/qcom/qcom_scm.c | 21 +++++---------------- 1 file changed, 5 insertions(+), 16 deletions(-) diff --git a/drivers/firmware/qcom/qcom_scm.c b/drivers/firmware/qcom/qcom_scm.c index 754f6056b99f..31071a714cf1 100644 --- a/drivers/firmware/qcom/qcom_scm.c +++ b/drivers/firmware/qcom/qcom_scm.c @@ -1197,32 +1197,21 @@ int qcom_scm_ice_set_key(u32 index, const u8 *key, u32 key_size, .args[4] = data_unit_size, .owner = ARM_SMCCC_OWNER_SIP, }; - void *keybuf; - dma_addr_t key_phys; + int ret; - /* - * 'key' may point to vmalloc()'ed memory, but we need to pass a - * physical address that's been properly flushed. The sanctioned way to - * do this is by using the DMA API. But as is best practice for crypto - * keys, we also must wipe the key after use. This makes kmemdup() + - * dma_map_single() not clearly correct, since the DMA API can use - * bounce buffers. Instead, just use dma_alloc_coherent(). Programming - * keys is normally rare and thus not performance-critical. - */ - - keybuf = dma_alloc_coherent(__scm->dev, key_size, &key_phys, - GFP_KERNEL); + void *keybuf __free(qcom_tzmem) = qcom_tzmem_alloc(__scm->mempool, + key_size, + GFP_KERNEL); if (!keybuf) return -ENOMEM; memcpy(keybuf, key, key_size); - desc.args[1] = key_phys; + desc.args[1] = qcom_tzmem_to_phys(keybuf); ret = qcom_scm_call(__scm->dev, &desc, NULL); memzero_explicit(keybuf, key_size); - dma_free_coherent(__scm->dev, key_size, keybuf, key_phys); return ret; } EXPORT_SYMBOL_GPL(qcom_scm_ice_set_key);