[{"id":3674361,"web_url":"http://patchwork.ozlabs.org/comment/3674361/","msgid":"","list_archive_url":null,"date":"2026-04-07T07:49:54","subject":"Re: [PATCH v3 01/10] hw/tpm: Add TPM CRB chunking fields","submitter":{"id":66774,"url":"http://patchwork.ozlabs.org/api/people/66774/","name":"Marc-André Lureau","email":"marcandre.lureau@redhat.com"},"content":"Hi\n\nOn Mon, Apr 6, 2026 at 6:18 PM Arun Menon wrote:\n>\n> From: Arun Menon \n>\n> - Add new fields to the CRB Interface Identifier and the CRB\n> Control Start registers.\n> - CRB_CTRL_START now has 2 new settings, that can be toggled using the\n> nextChunk and crbRspRetry bits.\n> - CapCRBChunk bit (10) was Reserved1 previously. The field is reused in\n> this revision of the specification.\n> - Refer to section 6.4.2.2 of [1]\n>\n> [1] https://trustedcomputinggroup.org/wp-content/uploads/PC-Client-Specific-Platform-TPM-Profile-for-TPM-2p0-v1p07_rc1_121225.pdf\n\nYou may update the link to the released version\nhttps://trustedcomputinggroup.org/wp-content/uploads/PC-Client-Specific-Platform-TPM-Profile-for-TPM-2p0-v1p07_Pub.pdf\n\n>\n> Signed-off-by: Arun Menon \n> Reviewed-by: Stefan Berger \n\nReviewed-by: Marc-André Lureau \n\n> ---\n> hw/tpm/tpm_crb.c | 3 +++\n> include/hw/acpi/tpm.h | 5 ++++-\n> 2 files changed, 7 insertions(+), 1 deletion(-)\n>\n> diff --git a/hw/tpm/tpm_crb.c b/hw/tpm/tpm_crb.c\n> index 8723536f93..0a1c7ecdc6 100644\n> --- a/hw/tpm/tpm_crb.c\n> +++ b/hw/tpm/tpm_crb.c\n> @@ -59,6 +59,7 @@ DECLARE_INSTANCE_CHECKER(CRBState, CRB,\n> #define CRB_INTF_CAP_FIFO_NOT_SUPPORTED 0b0\n> #define CRB_INTF_CAP_CRB_SUPPORTED 0b1\n> #define CRB_INTF_IF_SELECTOR_CRB 0b1\n> +#define CRB_INTF_CAP_CRB_CHUNK 0b1\n>\n> #define CRB_CTRL_CMD_SIZE (TPM_CRB_ADDR_SIZE - A_CRB_DATA_BUFFER)\n>\n> @@ -262,6 +263,8 @@ static void tpm_crb_reset(void *dev)\n> CapCRB, CRB_INTF_CAP_CRB_SUPPORTED);\n> ARRAY_FIELD_DP32(s->regs, CRB_INTF_ID,\n> InterfaceSelector, CRB_INTF_IF_SELECTOR_CRB);\n> + ARRAY_FIELD_DP32(s->regs, CRB_INTF_ID,\n> + CapCRBChunk, CRB_INTF_CAP_CRB_CHUNK);\n> ARRAY_FIELD_DP32(s->regs, CRB_INTF_ID,\n> RID, 0b0000);\n> ARRAY_FIELD_DP32(s->regs, CRB_INTF_ID2,\n> diff --git a/include/hw/acpi/tpm.h b/include/hw/acpi/tpm.h\n> index d2bf6637c5..03d452d2b5 100644\n> --- a/include/hw/acpi/tpm.h\n> +++ b/include/hw/acpi/tpm.h\n> @@ -149,7 +149,7 @@ REG32(CRB_INTF_ID, 0x30)\n> FIELD(CRB_INTF_ID, InterfaceVersion, 4, 4)\n> FIELD(CRB_INTF_ID, CapLocality, 8, 1)\n> FIELD(CRB_INTF_ID, CapCRBIdleBypass, 9, 1)\n> - FIELD(CRB_INTF_ID, Reserved1, 10, 1)\n> + FIELD(CRB_INTF_ID, CapCRBChunk, 10, 1)\n> FIELD(CRB_INTF_ID, CapDataXferSizeSupport, 11, 2)\n> FIELD(CRB_INTF_ID, CapFIFO, 13, 1)\n> FIELD(CRB_INTF_ID, CapCRB, 14, 1)\n> @@ -168,6 +168,9 @@ REG32(CRB_CTRL_STS, 0x44)\n> FIELD(CRB_CTRL_STS, tpmIdle, 1, 1)\n> REG32(CRB_CTRL_CANCEL, 0x48)\n> REG32(CRB_CTRL_START, 0x4C)\n> + FIELD(CRB_CTRL_START, invoke, 0, 1)\n\nAny reason to diverge from the spec \"Start\" naming here?\n\n> + FIELD(CRB_CTRL_START, crbRspRetry, 1, 1)\n> + FIELD(CRB_CTRL_START, nextChunk, 2, 1)\n> REG32(CRB_INT_ENABLED, 0x50)\n> REG32(CRB_INT_STS, 0x54)\n> REG32(CRB_CTRL_CMD_SIZE, 0x58)\n> --\n> 2.53.0\n>","headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256\n header.s=mimecast20190719 header.b=aKETjzme;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256\n header.s=google header.b=WuZExjdt;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; 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Tue, 07 Apr 2026\n 00:50:06 -0700 (PDT)"],"MIME-Version":"1.0","References":"<20260406141735.25844-1-armenon@redhat.com>\n <20260406141735.25844-2-armenon@redhat.com>","In-Reply-To":"<20260406141735.25844-2-armenon@redhat.com>","From":"=?utf-8?q?Marc-Andr=C3=A9_Lureau?= ","Date":"Tue, 7 Apr 2026 11:49:54 +0400","X-Gm-Features":"AQROBzDtwowtje3Ysgx5ZrasJVXquCi1HvuR-yY3xK0f6JBPSt7--7MiuVf7900","Message-ID":"\n ","Subject":"Re: [PATCH v3 01/10] hw/tpm: Add TPM CRB chunking fields","To":"Arun Menon ","Cc":"qemu-devel@nongnu.org, Ani Sinha ,\n Laurent Vivier , Zhao Liu ,\n Stefan Berger ,\n Marcel Apfelbaum ,\n Paolo Bonzini , Fabiano Rosas ,\n \"Michael S. Tsirkin\" , Yanan Wang ,\n Igor Mammedov ,\n =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= ,\n Stefan Berger ","Content-Type":"text/plain; charset=\"UTF-8\"","Content-Transfer-Encoding":"quoted-printable","Received-SPF":"pass client-ip=170.10.129.124; envelope-from=mlureau@redhat.com;\n helo=us-smtp-delivery-124.mimecast.com","X-Spam_score_int":"-25","X-Spam_score":"-2.6","X-Spam_bar":"--","X-Spam_report":"(-2.6 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.54,\n DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1,\n RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001,\n RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001,\n SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no","X-Spam_action":"no action","X-BeenThere":"qemu-devel@nongnu.org","X-Mailman-Version":"2.1.29","Precedence":"list","List-Id":"qemu development ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org","Sender":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org"}},{"id":3677673,"web_url":"http://patchwork.ozlabs.org/comment/3677673/","msgid":"","list_archive_url":null,"date":"2026-04-15T13:35:11","subject":"Re: [PATCH v3 01/10] hw/tpm: Add TPM CRB chunking fields","submitter":{"id":91136,"url":"http://patchwork.ozlabs.org/api/people/91136/","name":"Arun Menon","email":"armenon@redhat.com"},"content":"On Tue, Apr 07, 2026 at 11:49:54AM +0400, Marc-André Lureau wrote:\n> Hi\n>\n> On Mon, Apr 6, 2026 at 6:18 PM Arun Menon wrote:\n> >\n> > From: Arun Menon \n> >\n> > - Add new fields to the CRB Interface Identifier and the CRB\n> > Control Start registers.\n> > - CRB_CTRL_START now has 2 new settings, that can be toggled using the\n> > nextChunk and crbRspRetry bits.\n> > - CapCRBChunk bit (10) was Reserved1 previously. The field is reused in\n> > this revision of the specification.\n> > - Refer to section 6.4.2.2 of [1]\n> >\n> > [1] https://trustedcomputinggroup.org/wp-content/uploads/PC-Client-Specific-Platform-TPM-Profile-for-TPM-2p0-v1p07_rc1_121225.pdf\n>\n> You may update the link to the released version\n> https://trustedcomputinggroup.org/wp-content/uploads/PC-Client-Specific-Platform-TPM-Profile-for-TPM-2p0-v1p07_Pub.pdf\n>\n> >\n> > Signed-off-by: Arun Menon \n> > Reviewed-by: Stefan Berger \n>\n> Reviewed-by: Marc-André Lureau \n>\n> > ---\n> > hw/tpm/tpm_crb.c | 3 +++\n> > include/hw/acpi/tpm.h | 5 ++++-\n> > 2 files changed, 7 insertions(+), 1 deletion(-)\n> >\n> > diff --git a/hw/tpm/tpm_crb.c b/hw/tpm/tpm_crb.c\n> > index 8723536f93..0a1c7ecdc6 100644\n> > --- a/hw/tpm/tpm_crb.c\n> > +++ b/hw/tpm/tpm_crb.c\n> > @@ -59,6 +59,7 @@ DECLARE_INSTANCE_CHECKER(CRBState, CRB,\n> > #define CRB_INTF_CAP_FIFO_NOT_SUPPORTED 0b0\n> > #define CRB_INTF_CAP_CRB_SUPPORTED 0b1\n> > #define CRB_INTF_IF_SELECTOR_CRB 0b1\n> > +#define CRB_INTF_CAP_CRB_CHUNK 0b1\n> >\n> > #define CRB_CTRL_CMD_SIZE (TPM_CRB_ADDR_SIZE - A_CRB_DATA_BUFFER)\n> >\n> > @@ -262,6 +263,8 @@ static void tpm_crb_reset(void *dev)\n> > CapCRB, CRB_INTF_CAP_CRB_SUPPORTED);\n> > ARRAY_FIELD_DP32(s->regs, CRB_INTF_ID,\n> > InterfaceSelector, CRB_INTF_IF_SELECTOR_CRB);\n> > + ARRAY_FIELD_DP32(s->regs, CRB_INTF_ID,\n> > + CapCRBChunk, CRB_INTF_CAP_CRB_CHUNK);\n> > ARRAY_FIELD_DP32(s->regs, CRB_INTF_ID,\n> > RID, 0b0000);\n> > ARRAY_FIELD_DP32(s->regs, CRB_INTF_ID2,\n> > diff --git a/include/hw/acpi/tpm.h b/include/hw/acpi/tpm.h\n> > index d2bf6637c5..03d452d2b5 100644\n> > --- a/include/hw/acpi/tpm.h\n> > +++ b/include/hw/acpi/tpm.h\n> > @@ -149,7 +149,7 @@ REG32(CRB_INTF_ID, 0x30)\n> > FIELD(CRB_INTF_ID, InterfaceVersion, 4, 4)\n> > FIELD(CRB_INTF_ID, CapLocality, 8, 1)\n> > FIELD(CRB_INTF_ID, CapCRBIdleBypass, 9, 1)\n> > - FIELD(CRB_INTF_ID, Reserved1, 10, 1)\n> > + FIELD(CRB_INTF_ID, CapCRBChunk, 10, 1)\n> > FIELD(CRB_INTF_ID, CapDataXferSizeSupport, 11, 2)\n> > FIELD(CRB_INTF_ID, CapFIFO, 13, 1)\n> > FIELD(CRB_INTF_ID, CapCRB, 14, 1)\n> > @@ -168,6 +168,9 @@ REG32(CRB_CTRL_STS, 0x44)\n> > FIELD(CRB_CTRL_STS, tpmIdle, 1, 1)\n> > REG32(CRB_CTRL_CANCEL, 0x48)\n> > REG32(CRB_CTRL_START, 0x4C)\n> > + FIELD(CRB_CTRL_START, invoke, 0, 1)\n>\n> Any reason to diverge from the spec \"Start\" naming here?\n\nNo reason; I think I should stick to spec. I saw cancel invoke and I\nthought start should also have an invoke.\nI will change it to FIELD(CRB_CTRL_START, start, 0, 1)\n\n>\n> > + FIELD(CRB_CTRL_START, crbRspRetry, 1, 1)\n> > + FIELD(CRB_CTRL_START, nextChunk, 2, 1)\n> > REG32(CRB_INT_ENABLED, 0x50)\n> > REG32(CRB_INT_STS, 0x54)\n> > REG32(CRB_CTRL_CMD_SIZE, 0x58)\n> > --\n> > 2.53.0\n> >\n>\n\nRegards,\nArun Menon","headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256\n header.s=mimecast20190719 header.b=aIsg7t/E;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256\n header.s=google header.b=LiBXDZUq;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; helo=lists1p.gnu.org;\n envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n receiver=patchwork.ozlabs.org)"],"Received":["from lists1p.gnu.org (lists1p.gnu.org [209.51.188.17])\n\t(using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fwhxj4qQRz1yCv\n\tfor ; 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