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bh=OtsQrBTSZxnze/3PFKDuMZdI/yapTOY94mDoz2wrV3U=; b=G0wli1iSE9w13mbe2YYllmYkzGkSgIAHtSwL4ehLBpodd4g9SoFzJKf4f0WqA3BSbtlfI9 9bHjqszOjNnrkvRmCnLIFW0ag/VYUZ3i9JbnFvmW4xAbXTjMWsSAR6Rmo55h8qRN33uSfh QgOyDkFWH6ybB/RKgk5yz5zotE9UQxg= X-MC-Unique: fQuwCeVQOaejh9FDPgKk0w-1 From: Eric Auger To: eric.auger.pro@gmail.com, eric.auger@redhat.com, mst@redhat.com, imammedo@redhat.com, philmd@redhat.com, peter.maydell@linaro.org, shannon.zhaosl@gmail.com, qemu-arm@nongnu.org, qemu-devel@nongnu.org, ardb@kernel.org, drjones@redhat.com Subject: [PATCH v4 2/3] hw/arm/virt_acpi_build: Generate DBG2 table Date: Thu, 7 Oct 2021 09:29:21 +0200 Message-Id: <20211007072922.655330-3-eric.auger@redhat.com> In-Reply-To: <20211007072922.655330-1-eric.auger@redhat.com> References: <20211007072922.655330-1-eric.auger@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=eric.auger@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.133.124; envelope-from=eric.auger@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -28 X-Spam_score: -2.9 X-Spam_bar: -- X-Spam_report: (-2.9 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.05, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: gshan@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1633592041717100001 Content-Type: text/plain; charset="utf-8" ARM SBBR specification mandates DBG2 table (Debug Port Table 2) since v1.0 (ARM DEN0044F 8.3.1.7 DBG2). The DBG2 table allows to describe one or more debug ports. Generate an DBG2 table featuring a single debug port, the PL011. The DBG2 specification can be found at "Microsoft Debug Port Table 2 (DBG2)" https://docs.microsoft.com/en-us/windows-hardware/drivers/bringup/acpi-debu= g-port-table?redirectedfrom=3DMSDN Signed-off-by: Eric Auger Acked-by: Michael S. Tsirkin Reviewed-by: Andrew Jones Reviewed-by: Igor Mammedov --- v3 -> v4: - Change the revision in the header (0), + vs comments, s/0x1000/vms->memmap[VIRT_UART].size - Added Michael's A-b v2 -> v3: Took into account all comments from Igor on v2: mostly style adjustment, revision references v1 -> v2: - rebased on Igor's refactoring --- hw/arm/virt-acpi-build.c | 63 +++++++++++++++++++++++++++++++++++++++- 1 file changed, 62 insertions(+), 1 deletion(-) diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c index 6cec97352b..dd17a48c00 100644 --- a/hw/arm/virt-acpi-build.c +++ b/hw/arm/virt-acpi-build.c @@ -616,6 +616,64 @@ build_gtdt(GArray *table_data, BIOSLinker *linker, Vir= tMachineState *vms) acpi_table_end(linker, &table); } =20 +/* Debug Port Table 2 (DBG2) */ +static void +build_dbg2(GArray *table_data, BIOSLinker *linker, VirtMachineState *vms) +{ + AcpiTable table =3D { .sig =3D "DBG2", .rev =3D 0, .oem_id =3D vms->oe= m_id, + .oem_table_id =3D vms->oem_table_id }; + int dbg2devicelength; + const char name[] =3D "COM0"; + const int namespace_length =3D sizeof(name); + + acpi_table_begin(&table, table_data); + + dbg2devicelength =3D 22 + /* BaseAddressRegister[] offset */ + 12 + /* BaseAddressRegister[] */ + 4 + /* AddressSize[] */ + namespace_length /* NamespaceString[] */; + + /* OffsetDbgDeviceInfo */ + build_append_int_noprefix(table_data, 44, 4); + /* NumberDbgDeviceInfo */ + build_append_int_noprefix(table_data, 1, 4); + + /* Table 2. Debug Device Information structure format */ + build_append_int_noprefix(table_data, 0, 1); /* Revision */ + build_append_int_noprefix(table_data, dbg2devicelength, 2); /* Length = */ + /* NumberofGenericAddressRegisters */ + build_append_int_noprefix(table_data, 1, 1); + /* NameSpaceStringLength */ + build_append_int_noprefix(table_data, namespace_length, 2); + build_append_int_noprefix(table_data, 38, 2); /* NameSpaceStringOffset= */ + build_append_int_noprefix(table_data, 0, 2); /* OemDataLength */ + /* OemDataOffset (0 means no OEM data) */ + build_append_int_noprefix(table_data, 0, 2); + + /* Port Type */ + build_append_int_noprefix(table_data, 0x8000 /* Serial */, 2); + /* Port Subtype */ + build_append_int_noprefix(table_data, 0x3 /* ARM PL011 UART */, 2); + build_append_int_noprefix(table_data, 0, 2); /* Reserved */ + /* BaseAddressRegisterOffset */ + build_append_int_noprefix(table_data, 22, 2); + /* AddressSizeOffset */ + build_append_int_noprefix(table_data, 34, 2); + + /* BaseAddressRegister[] */ + build_append_gas(table_data, AML_AS_SYSTEM_MEMORY, 8, 0, 1, + vms->memmap[VIRT_UART].base); + + /* AddressSize[] */ + build_append_int_noprefix(table_data, + vms->memmap[VIRT_UART].size, 4); + + /* NamespaceString[] */ + g_array_append_vals(table_data, name, namespace_length); + + acpi_table_end(linker, &table); +}; + /* * ACPI spec, Revision 5.1 Errata A * 5.2.12 Multiple APIC Description Table (MADT) @@ -875,7 +933,7 @@ void virt_acpi_build(VirtMachineState *vms, AcpiBuildTa= bles *tables) dsdt =3D tables_blob->len; build_dsdt(tables_blob, tables->linker, vms); =20 - /* FADT MADT GTDT MCFG SPCR pointed to by RSDT */ + /* FADT MADT GTDT MCFG SPCR DBG2 pointed to by RSDT */ acpi_add_table(table_offsets, tables_blob); build_fadt_rev5(tables_blob, tables->linker, vms, dsdt); =20 @@ -898,6 +956,9 @@ void virt_acpi_build(VirtMachineState *vms, AcpiBuildTa= bles *tables) acpi_add_table(table_offsets, tables_blob); build_spcr(tables_blob, tables->linker, vms); =20 + acpi_add_table(table_offsets, tables_blob); + build_dbg2(tables_blob, tables->linker, vms); + if (vms->ras) { build_ghes_error_table(tables->hardware_errors, tables->linker); acpi_add_table(table_offsets, tables_blob); --=20 2.26.3