diff options
Diffstat (limited to 'pc-bios/bios-pq/0011_read-additional-acpi-tables-from-a-vm.patch')
| -rw-r--r-- | pc-bios/bios-pq/0011_read-additional-acpi-tables-from-a-vm.patch | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/pc-bios/bios-pq/0011_read-additional-acpi-tables-from-a-vm.patch b/pc-bios/bios-pq/0011_read-additional-acpi-tables-from-a-vm.patch new file mode 100644 index 0000000000..0250021fe4 --- /dev/null +++ b/pc-bios/bios-pq/0011_read-additional-acpi-tables-from-a-vm.patch @@ -0,0 +1,155 @@ +Read additional ACPI tables from a VM (Gleb Natapov) + +Signed-off-by: Gleb Natapov <gleb@redhat.com> +Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> + +diff --git a/bios/rombios32.c b/bios/rombios32.c +index 3269be5..191707d 100644 +--- a/bios/rombios32.c ++++ b/bios/rombios32.c +@@ -457,6 +457,8 @@ void wrmsr_smp(uint32_t index, uint64_t val) + #define QEMU_CFG_SIGNATURE 0x00 + #define QEMU_CFG_ID 0x01 + #define QEMU_CFG_UUID 0x02 ++#define QEMU_CFG_ARCH_LOCAL 0x8000 ++#define QEMU_CFG_ACPI_TABLES (QEMU_CFG_ARCH_LOCAL + 0) + + int qemu_cfg_port; + +@@ -484,6 +486,27 @@ void qemu_cfg_read(uint8_t *buf, int len) + while (len--) + *(buf++) = inb(QEMU_CFG_DATA_PORT); + } ++ ++static uint16_t acpi_additional_tables(void) ++{ ++ uint16_t cnt; ++ ++ qemu_cfg_select(QEMU_CFG_ACPI_TABLES); ++ qemu_cfg_read((uint8_t*)&cnt, sizeof(cnt)); ++ ++ return cnt; ++} ++ ++static int acpi_load_table(int i, uint32_t addr, uint16_t *len) ++{ ++ qemu_cfg_read((uint8_t*)len, sizeof(*len)); ++ ++ if (!*len) ++ return -1; ++ ++ qemu_cfg_read((uint8_t*)addr, *len); ++ return 0; ++} + #endif + + void uuid_probe(void) +@@ -1534,8 +1557,8 @@ void acpi_bios_init(void) + uint32_t hpet_addr; + #endif + uint32_t base_addr, rsdt_addr, fadt_addr, addr, facs_addr, dsdt_addr, ssdt_addr; +- uint32_t acpi_tables_size, madt_addr, madt_size; +- int i; ++ uint32_t acpi_tables_size, madt_addr, madt_size, rsdt_size; ++ uint16_t i, external_tables; + + /* reserve memory space for tables */ + #ifdef BX_USE_EBDA_TABLES +@@ -1548,10 +1571,17 @@ void acpi_bios_init(void) + bios_table_cur_addr += sizeof(*rsdp); + #endif + ++#ifdef BX_QEMU ++ external_tables = acpi_additional_tables(); ++#else ++ external_tables = 0; ++#endif ++ + addr = base_addr = ram_size - ACPI_DATA_SIZE; + rsdt_addr = addr; + rsdt = (void *)(addr); +- addr += sizeof(*rsdt); ++ rsdt_size = sizeof(*rsdt) + external_tables * 4; ++ addr += rsdt_size; + + fadt_addr = addr; + fadt = (void *)(addr); +@@ -1590,12 +1620,6 @@ void acpi_bios_init(void) + addr += sizeof(*hpet); + #endif + +- acpi_tables_size = addr - base_addr; +- +- BX_INFO("ACPI tables: RSDP addr=0x%08lx ACPI DATA addr=0x%08lx size=0x%x\n", +- (unsigned long)rsdp, +- (unsigned long)rsdt, acpi_tables_size); +- + /* RSDP */ + memset(rsdp, 0, sizeof(*rsdp)); + memcpy(rsdp->signature, "RSD PTR ", 8); +@@ -1607,17 +1631,6 @@ void acpi_bios_init(void) + rsdp->rsdt_physical_address = cpu_to_le32(rsdt_addr); + rsdp->checksum = acpi_checksum((void *)rsdp, 20); + +- /* RSDT */ +- memset(rsdt, 0, sizeof(*rsdt)); +- rsdt->table_offset_entry[0] = cpu_to_le32(fadt_addr); +- rsdt->table_offset_entry[1] = cpu_to_le32(madt_addr); +- rsdt->table_offset_entry[2] = cpu_to_le32(ssdt_addr); +-#ifdef BX_QEMU +- rsdt->table_offset_entry[3] = cpu_to_le32(hpet_addr); +-#endif +- acpi_build_table_header((struct acpi_table_header *)rsdt, +- "RSDT", sizeof(*rsdt), 1); +- + /* FADT */ + memset(fadt, 0, sizeof(*fadt)); + fadt->firmware_ctrl = cpu_to_le32(facs_addr); +@@ -1692,6 +1705,7 @@ void acpi_bios_init(void) + "APIC", madt_size, 1); + } + ++ memset(rsdt, 0, rsdt_size); + #ifdef BX_QEMU + /* HPET */ + memset(hpet, 0, sizeof(*hpet)); +@@ -1702,7 +1716,34 @@ void acpi_bios_init(void) + hpet->addr.address = cpu_to_le32(ACPI_HPET_ADDRESS); + acpi_build_table_header((struct acpi_table_header *)hpet, + "HPET", sizeof(*hpet), 1); ++ ++ acpi_additional_tables(); /* resets cfg to required entry */ ++ for(i = 0; i < external_tables; i++) { ++ uint16_t len; ++ if(acpi_load_table(i, addr, &len) < 0) ++ BX_PANIC("Failed to load ACPI table from QEMU\n"); ++ rsdt->table_offset_entry[i+4] = cpu_to_le32(addr); ++ addr += len; ++ if(addr >= ram_size) ++ BX_PANIC("ACPI table overflow\n"); ++ } ++#endif ++ ++ /* RSDT */ ++ rsdt->table_offset_entry[0] = cpu_to_le32(fadt_addr); ++ rsdt->table_offset_entry[1] = cpu_to_le32(madt_addr); ++ rsdt->table_offset_entry[2] = cpu_to_le32(ssdt_addr); ++#ifdef BX_QEMU ++ rsdt->table_offset_entry[3] = cpu_to_le32(hpet_addr); + #endif ++ acpi_build_table_header((struct acpi_table_header *)rsdt, ++ "RSDT", rsdt_size, 1); ++ ++ acpi_tables_size = addr - base_addr; ++ ++ BX_INFO("ACPI tables: RSDP addr=0x%08lx ACPI DATA addr=0x%08lx size=0x%x\n", ++ (unsigned long)rsdp, ++ (unsigned long)rsdt, acpi_tables_size); + + } + +-- + Gleb. + + + |