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[2620:137:e000::1:20]) by mx.google.com with ESMTP id b7-20020a056402350700b0046351fa4ae2si7609785edd.99.2022.11.27.08.18.31; Sun, 27 Nov 2022 08:18:51 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=OqnEQgq6; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229622AbiK0PrQ (ORCPT + 84 others); Sun, 27 Nov 2022 10:47:16 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55760 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229535AbiK0PrO (ORCPT ); Sun, 27 Nov 2022 10:47:14 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D5A2DDEC0; Sun, 27 Nov 2022 07:47:13 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 3567CB80B0E; Sun, 27 Nov 2022 15:47:12 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 58DD3C433D6; Sun, 27 Nov 2022 15:47:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1669564030; bh=LD1YKON3zFK4mG5HlyRH/MyGGwYEkQUzCSS1PsDLugw=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=OqnEQgq6+MI5qH/iq/zewhEN+UWTUcGLro+2ThPBjtRpkQMIXviACZZ1gTKVtLK5C WlrrLK9Yj3eafY0ftTQzsMc7eVzWzRM5KuR/zQ5CkFX7rk22tM450EA+wrozJyO0od YTEppawNlJYmiS8ylhZIKEWgWnLN+av+Ys7KYoxKuJuQ+T9Ij8znyeGmTxYef8ASr7 zd2ILbx4yN6sXBtwNusS8nTwx6mIwike1UCN2Wn7QUsQcCMvt1UDKTmYHvD7dHm5KN uHa4dFW2l6px77EGhz+6v+u0CX4mbvoh59EymVSur3Kfc95GkUrpxu8RIM7smcu3Ji +vLoJ/Lswol0Q== Date: Sun, 27 Nov 2022 17:47:06 +0200 From: Jarkko Sakkinen To: Eddie James Cc: linux-integrity@vger.kernel.org, linux-kernel@vger.kernel.org, peterhuewe@gmx.de, jgg@ziepe.ca, joel@jms.id.au Subject: Re: [PATCH v2] tpm: Add flag to use default cancellation policy Message-ID: References: <20221107171423.51019-1-eajames@linux.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20221107171423.51019-1-eajames@linux.ibm.com> X-Spam-Status: No, score=-7.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_HI, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Nov 07, 2022 at 11:14:23AM -0600, Eddie James wrote: > The check for cancelled request depends on the VID of the chip, but > some chips share VID which shouldn't share their cancellation > behavior. This is the case for the Nuvoton NPCT75X, which should use > the default cancellation check, not the Winbond one. > To avoid changing the existing behavior, add a new flag to indicate > that the chip should use the default cancellation check and set it > for the I2C TPM2 TIS driver. > > Signed-off-by: Eddie James > --- > Changes since v1: > - Update switch statement with default: break; > > drivers/char/tpm/tpm_tis_core.c | 20 ++++++++++++-------- > drivers/char/tpm/tpm_tis_core.h | 1 + > drivers/char/tpm/tpm_tis_i2c.c | 1 + > 3 files changed, 14 insertions(+), 8 deletions(-) > > diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c > index 757623bacfd5..3f98e587b3e8 100644 > --- a/drivers/char/tpm/tpm_tis_core.c > +++ b/drivers/char/tpm/tpm_tis_core.c > @@ -682,15 +682,19 @@ static bool tpm_tis_req_canceled(struct tpm_chip *chip, u8 status) > { > struct tpm_tis_data *priv = dev_get_drvdata(&chip->dev); > > - switch (priv->manufacturer_id) { > - case TPM_VID_WINBOND: > - return ((status == TPM_STS_VALID) || > - (status == (TPM_STS_VALID | TPM_STS_COMMAND_READY))); > - case TPM_VID_STM: > - return (status == (TPM_STS_VALID | TPM_STS_COMMAND_READY)); > - default: > - return (status == TPM_STS_COMMAND_READY); > + if (!test_bit(TPM_TIS_DEFAULT_CANCELLATION, &priv->flags)) { > + switch (priv->manufacturer_id) { > + case TPM_VID_WINBOND: > + return ((status == TPM_STS_VALID) || > + (status == (TPM_STS_VALID | TPM_STS_COMMAND_READY))); > + case TPM_VID_STM: > + return (status == (TPM_STS_VALID | TPM_STS_COMMAND_READY)); > + default: > + break; > + } > } > + > + return status == TPM_STS_COMMAND_READY; > } > > static irqreturn_t tis_int_handler(int dummy, void *dev_id) > diff --git a/drivers/char/tpm/tpm_tis_core.h b/drivers/char/tpm/tpm_tis_core.h > index 66a5a13cd1df..b68479e0de10 100644 > --- a/drivers/char/tpm/tpm_tis_core.h > +++ b/drivers/char/tpm/tpm_tis_core.h > @@ -86,6 +86,7 @@ enum tis_defaults { > enum tpm_tis_flags { > TPM_TIS_ITPM_WORKAROUND = BIT(0), > TPM_TIS_INVALID_STATUS = BIT(1), > + TPM_TIS_DEFAULT_CANCELLATION = BIT(2), > }; > > struct tpm_tis_data { > diff --git a/drivers/char/tpm/tpm_tis_i2c.c b/drivers/char/tpm/tpm_tis_i2c.c > index 45f388127f4b..91451ee1ef8d 100644 > --- a/drivers/char/tpm/tpm_tis_i2c.c > +++ b/drivers/char/tpm/tpm_tis_i2c.c > @@ -329,6 +329,7 @@ static int tpm_tis_i2c_probe(struct i2c_client *dev, > if (!phy->io_buf) > return -ENOMEM; > > + set_bit(TPM_TIS_DEFAULT_CANCELLATION, &phy->priv.flags); > phy->i2c_client = dev; > > /* must precede all communication with the tpm */ > -- > 2.31.1 > Reviewed-by: Jarkko Sakkinen BR, Jarkko