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Tsirkin" , Marcelo Tosatti , Marcel Apfelbaum , Zhao Liu , kvm@vger.kernel.org, Oliver Steffen Subject: [PATCH v5 1/6] hw/acpi: Make BIOS linker optional Date: Tue, 27 Jan 2026 10:59:31 +0100 Message-ID: <20260127095936.1072464-2-osteffen@redhat.com> In-Reply-To: <20260127095936.1072464-1-osteffen@redhat.com> References: <20260127095936.1072464-1-osteffen@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 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=osteffen@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, 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: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1769508026148154101 Content-Type: text/plain; charset="utf-8" Make the BIOS linker optional in acpi_table_end() and calculate the ACPI table checksum directly if no linker is provided. This makes it possible to call for example acpi_build_madt() from outside the ACPI table builder context. Signed-off-by: Oliver Steffen --- hw/acpi/aml-build.c | 29 +++++++++++++++++++++++++++-- 1 file changed, 27 insertions(+), 2 deletions(-) diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c index dad4cfcc7d..6a3650076f 100644 --- a/hw/acpi/aml-build.c +++ b/hw/acpi/aml-build.c @@ -1730,6 +1730,25 @@ void acpi_table_begin(AcpiTable *desc, GArray *array) build_append_int_noprefix(array, 1, 4); /* Creator Revision */ } =20 +static uint8_t calculate_acpi_checksum(const gchar *data, size_t len) +{ + size_t i; + uint8_t sum =3D 0; + + for (i =3D 0; i < len; ++i) { + sum +=3D (uint8_t)data[i]; + } + + return sum; +} + +static void update_acpi_checksum(gchar *data, size_t start_offset, + size_t table_len, size_t checksum_offset) +{ + uint8_t sum =3D calculate_acpi_checksum(&data[start_offset], table_len= ); + data[checksum_offset] =3D 0xff - sum + 1; +} + void acpi_table_end(BIOSLinker *linker, AcpiTable *desc) { /* @@ -1748,8 +1767,14 @@ void acpi_table_end(BIOSLinker *linker, AcpiTable *d= esc) */ memcpy(len_ptr, &table_len_le, sizeof table_len_le); =20 - bios_linker_loader_add_checksum(linker, ACPI_BUILD_TABLE_FILE, - desc->table_offset, table_len, desc->table_offset + checksum_offse= t); + if (linker !=3D NULL) { + bios_linker_loader_add_checksum(linker, ACPI_BUILD_TABLE_FILE, + desc->table_offset, table_len, + desc->table_offset + checksum_offs= et); + } else { + update_acpi_checksum(desc->array->data, desc->table_offset, + table_len, desc->table_offset + checksum_offs= et); + } } =20 void *acpi_data_push(GArray *table_data, unsigned size) --=20 2.52.0