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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::62d; envelope-from=palmer@rivosinc.com; helo=mail-pl1-x62d.google.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: 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 @rivosinc-com.20210112.gappssmtp.com) X-ZM-MESSAGEID: 1678140426782100004 Content-Type: text/plain; charset="utf-8" From: Sunil V L RISC-V ACPI platforms need to provide RISC-V Hart Capabilities Table (RHCT). Add this to the ACPI tables. Signed-off-by: Sunil V L Reviewed-by: Andrew Jones Message-ID: <20230302091212.999767-7-sunilvl@ventanamicro.com> Signed-off-by: Palmer Dabbelt --- hw/riscv/virt-acpi-build.c | 78 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 78 insertions(+) diff --git a/hw/riscv/virt-acpi-build.c b/hw/riscv/virt-acpi-build.c index 026d1eaf88..82da0a238c 100644 --- a/hw/riscv/virt-acpi-build.c +++ b/hw/riscv/virt-acpi-build.c @@ -33,6 +33,7 @@ #include "migration/vmstate.h" #include "hw/riscv/virt.h" #include "hw/riscv/numa.h" +#include "hw/intc/riscv_aclint.h" =20 #define ACPI_BUILD_TABLE_SIZE 0x20000 =20 @@ -111,6 +112,80 @@ static void acpi_dsdt_add_fw_cfg(Aml *scope, const Mem= MapEntry *fw_cfg_memmap) aml_append(scope, dev); } =20 +/* RHCT Node[N] starts at offset 56 */ +#define RHCT_NODE_ARRAY_OFFSET 56 + +/* + * ACPI spec, Revision 6.5+ + * 5.2.36 RISC-V Hart Capabilities Table (RHCT) + * REF: https://github.com/riscv-non-isa/riscv-acpi/issues/16 + * https://drive.google.com/file/d/1nP3nFiH4jkPMp6COOxP6123DCZKR-tia/= view + */ +static void build_rhct(GArray *table_data, + BIOSLinker *linker, + RISCVVirtState *s) +{ + MachineClass *mc =3D MACHINE_GET_CLASS(s); + MachineState *ms =3D MACHINE(s); + const CPUArchIdList *arch_ids =3D mc->possible_cpu_arch_ids(ms); + size_t len, aligned_len; + uint32_t isa_offset, num_rhct_nodes; + RISCVCPU *cpu; + char *isa; + + AcpiTable table =3D { .sig =3D "RHCT", .rev =3D 1, .oem_id =3D s->oem_= id, + .oem_table_id =3D s->oem_table_id }; + + acpi_table_begin(&table, table_data); + + build_append_int_noprefix(table_data, 0x0, 4); /* Reserved */ + + /* Time Base Frequency */ + build_append_int_noprefix(table_data, + RISCV_ACLINT_DEFAULT_TIMEBASE_FREQ, 8); + + /* ISA + N hart info */ + num_rhct_nodes =3D 1 + ms->smp.cpus; + + /* Number of RHCT nodes*/ + build_append_int_noprefix(table_data, num_rhct_nodes, 4); + + /* Offset to the RHCT node array */ + build_append_int_noprefix(table_data, RHCT_NODE_ARRAY_OFFSET, 4); + + /* ISA String Node */ + isa_offset =3D table_data->len - table.table_offset; + build_append_int_noprefix(table_data, 0, 2); /* Type 0 */ + + cpu =3D &s->soc[0].harts[0]; + isa =3D riscv_isa_string(cpu); + len =3D 8 + strlen(isa) + 1; + aligned_len =3D (len % 2) ? (len + 1) : len; + + build_append_int_noprefix(table_data, aligned_len, 2); /* Length */ + build_append_int_noprefix(table_data, 0x1, 2); /* Revision */ + + /* ISA string length including NUL */ + build_append_int_noprefix(table_data, strlen(isa) + 1, 2); + g_array_append_vals(table_data, isa, strlen(isa) + 1); /* ISA string= */ + + if (aligned_len !=3D len) { + build_append_int_noprefix(table_data, 0x0, 1); /* Optional Paddi= ng */ + } + + /* Hart Info Node */ + for (int i =3D 0; i < arch_ids->len; i++) { + build_append_int_noprefix(table_data, 0xFFFF, 2); /* Type */ + build_append_int_noprefix(table_data, 16, 2); /* Length */ + build_append_int_noprefix(table_data, 0x1, 2); /* Revision */ + build_append_int_noprefix(table_data, 1, 2); /* Number of offse= ts */ + build_append_int_noprefix(table_data, i, 4); /* ACPI Processor = UID */ + build_append_int_noprefix(table_data, isa_offset, 4); /* Offsets[0= ] */ + } + + acpi_table_end(linker, &table); +} + /* FADT */ static void build_fadt_rev6(GArray *table_data, BIOSLinker *linker, @@ -215,6 +290,9 @@ static void virt_acpi_build(RISCVVirtState *s, AcpiBuil= dTables *tables) acpi_add_table(table_offsets, tables_blob); build_madt(tables_blob, tables->linker, s); =20 + acpi_add_table(table_offsets, tables_blob); + build_rhct(tables_blob, tables->linker, s); + /* XSDT is pointed to by RSDP */ xsdt =3D tables_blob->len; build_xsdt(tables_blob, tables->linker, table_offsets, s->oem_id, --=20 2.39.2