From nobody Tue Dec 23 10:15:39 2025 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1631026324955572.3026435382893; Tue, 7 Sep 2021 07:52:04 -0700 (PDT) Received: from localhost ([::1]:58410 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mNcSB-0005lV-U5 for importer@patchew.org; Tue, 07 Sep 2021 10:52:03 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:36714) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mNcOk-0005iu-R5 for qemu-devel@nongnu.org; Tue, 07 Sep 2021 10:48:30 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:28890) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mNcOi-000864-V0 for qemu-devel@nongnu.org; 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bh=dI1nXtzrYpzKxm5Dm5hJDAuG+TqjiVGXFjLK27Te20I=; b=h5hfN7GqchElbEYbiCmbMEGJ7jI7WMIHbtAnIVAuNf2HoBcnLX28nZQY51GLL6iiSYPJeU +xuzmO9pXYokfuVXwocauXJCQYJPowX3TsAIKIwJntcmyExI+0nqOvQpcKnM6ifDUceS+I +S3om2cweMOlA4BnYERajLEG6KWgluc= X-MC-Unique: _SoCgXkjNVCWac8w0FuNJQ-1 From: Igor Mammedov To: qemu-devel@nongnu.org Subject: [PATCH v3 01/35] acpi: add helper routines to initialize ACPI tables Date: Tue, 7 Sep 2021 10:47:40 -0400 Message-Id: <20210907144814.741785-2-imammedo@redhat.com> In-Reply-To: <20210907144814.741785-1-imammedo@redhat.com> References: <20210907144814.741785-1-imammedo@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=imammedo@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=imammedo@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -31 X-Spam_score: -3.2 X-Spam_bar: --- X-Spam_report: (-3.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.391, 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: wangyanan55@huawei.com, eric.auger@redhat.com, mst@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZM-MESSAGEID: 1631026326458100001 Content-Type: text/plain; charset="utf-8" Patch introduces acpi_table_begin()/ acpi_table_end() API that hides pointer/offset arithmetic from user as opposed to build_header(), to prevent errors caused by it [1]. acpi_table_begin(): initializes table header and keeps track of table data/offsets acpi_table_end(): sets actual table length and tells bios loader where table is for the later initialization on guest side. 1) commits bb9feea43179 x86: acpi: use offset instead of pointer when using build_h= eader() 4d027afeb3a9 Virt: ACPI: fix qemu assert due to re-assigned table data a= ddress Signed-off-by: Igor Mammedov Reviewed-by: Eric Auger --- CC: eric.auger@redhat.com CC: wangyanan55@huawei.com --- include/hw/acpi/aml-build.h | 31 +++++++++++++++++++ hw/acpi/aml-build.c | 62 +++++++++++++++++++++++++++++++++++++ 2 files changed, 93 insertions(+) diff --git a/include/hw/acpi/aml-build.h b/include/hw/acpi/aml-build.h index 471266d739..4242382399 100644 --- a/include/hw/acpi/aml-build.h +++ b/include/hw/acpi/aml-build.h @@ -413,6 +413,37 @@ Aml *aml_concatenate(Aml *source1, Aml *source2, Aml *= target); Aml *aml_object_type(Aml *object); =20 void build_append_int_noprefix(GArray *table, uint64_t value, int size); + +typedef struct AcpiTable { + const char *sig; + const uint8_t rev; + const char *oem_id; + const char *oem_table_id; + /* private vars tracking table state */ + GArray *array; + unsigned table_offset; +} AcpiTable; + +/** + * acpi_table_begin: + * initializes table header and keeps track of + * table data/offsets + * @desc: ACPI table descriptor + * @array: blob where the ACPI table will be composed/stored. + */ +void acpi_table_begin(AcpiTable *desc, GArray *array); + +/** + * acpi_table_end: + * sets actual table length and tells bios loader + * where table is for the later initialization on + * guest side. + * @linker: reference to BIOSLinker object to use for the table + * @table: ACPI table descriptor that was used with @acpi_table_begin + * counterpart + */ +void acpi_table_end(BIOSLinker *linker, AcpiTable *table); + void build_header(BIOSLinker *linker, GArray *table_data, AcpiTableHeader *h, const char *sig, int len, uint8_t rev, diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c index d5103e6d7b..229a3eb654 100644 --- a/hw/acpi/aml-build.c +++ b/hw/acpi/aml-build.c @@ -52,6 +52,19 @@ static void build_append_byte(GArray *array, uint8_t val) g_array_append_val(array, val); } =20 +static void build_append_padded_str(GArray *array, const char *str, + size_t maxlen, char pad) +{ + size_t i; + size_t len =3D strlen(str); + + g_assert(len <=3D maxlen); + g_array_append_vals(array, str, len); + for (i =3D maxlen - len; i > 0; i--) { + g_array_append_val(array, pad); + } +} + static void build_append_array(GArray *array, GArray *val) { g_array_append_vals(array, val->data, val->len); @@ -1692,6 +1705,55 @@ Aml *aml_object_type(Aml *object) return var; } =20 +void acpi_table_begin(AcpiTable *desc, GArray *array) +{ + + desc->array =3D array; + desc->table_offset =3D array->len; + + /* + * ACPI spec 1.0b + * 5.2.3 System Description Table Header + */ + g_assert(strlen(desc->sig) =3D=3D 4); + g_array_append_vals(array, desc->sig, 4); /* Signature */ + /* + * reserve space for Length field, which will be patched by + * acpi_table_end() when the table creation is finished. + */ + build_append_int_noprefix(array, 0, 4); /* Length */ + build_append_int_noprefix(array, desc->rev, 1); /* Revision */ + build_append_int_noprefix(array, 0, 1); /* Checksum */ + build_append_padded_str(array, desc->oem_id, 6, ' '); /* OEMID */ + /* OEM Table ID */ + build_append_padded_str(array, desc->oem_table_id, 8, ' '); + build_append_int_noprefix(array, 1, 4); /* OEM Revision */ + g_array_append_vals(array, ACPI_BUILD_APPNAME8, 4); /* Creator ID */ + build_append_int_noprefix(array, 1, 4); /* Creator Revision */ +} + +void acpi_table_end(BIOSLinker *linker, AcpiTable *desc) +{ + /* + * ACPI spec 1.0b + * 5.2.3 System Description Table Header + * Table 5-2 DESCRIPTION_HEADER Fields + */ + const unsigned checksum_offset =3D 9; + uint32_t table_len =3D desc->array->len - desc->table_offset; + uint32_t table_len_le =3D cpu_to_le32(table_len); + gchar *len_ptr =3D &desc->array->data[desc->table_offset + 4]; + + /* patch "Length" field that has been reserved by acpi_table_begin() + * to the actual length, i.e. accumulated table length from + * acpi_table_begin() till acpi_table_end() + */ + memcpy(len_ptr, &table_len_le, sizeof table_len_le); + + bios_linker_loader_add_checksum(linker, ACPI_BUILD_TABLE_FILE, + desc->table_offset, table_len, desc->table_offset + checksum_offse= t); +} + void build_header(BIOSLinker *linker, GArray *table_data, AcpiTableHeader *h, const char *sig, int len, uint8_t rev, --=20 2.27.0