Signed-off-by: Jes Sorensen --- pc-bios/bios-pq/0017-qemu-kvm-cfg-maxcpus.patch | 57 +++++++++++++ pc-bios/bios-pq/0018-qemu-madt-maxcpus.patch | 105 ++++++++++++++++++++++++ pc-bios/bios-pq/series | 2 3 files changed, 164 insertions(+) Index: qemu/pc-bios/bios-pq/0017-qemu-kvm-cfg-maxcpus.patch =================================================================== --- /dev/null +++ qemu/pc-bios/bios-pq/0017-qemu-kvm-cfg-maxcpus.patch @@ -0,0 +1,57 @@ +Read max_cpus variable from QEMU_CFG. If not provided, use value of +smp_cpus. + +Signed-off-by: Jes Sorensen + +diff --git a/bios/rombios32.c b/bios/rombios32.c +index f861f81..f4a6300 100644 +--- a/bios/rombios32.c ++++ b/bios/rombios32.c +@@ -436,6 +436,7 @@ void delay_ms(int n) + } + + uint16_t smp_cpus; ++uint16_t max_cpus; + uint32_t cpuid_signature; + uint32_t cpuid_features; + uint32_t cpuid_ext_features; +@@ -474,6 +475,7 @@ void wrmsr_smp(uint32_t index, uint64_t val) + #define QEMU_CFG_ID 0x01 + #define QEMU_CFG_UUID 0x02 + #define QEMU_CFG_NUMA 0x0D ++#define QEMU_CFG_MAX_CPUS 0x0E + #define QEMU_CFG_ARCH_LOCAL 0x8000 + #define QEMU_CFG_ACPI_TABLES (QEMU_CFG_ARCH_LOCAL + 0) + #define QEMU_CFG_SMBIOS_ENTRIES (QEMU_CFG_ARCH_LOCAL + 1) +@@ -536,6 +538,19 @@ static uint16_t smbios_entries(void) + return cnt; + } + ++static uint16_t get_max_cpus(void) ++{ ++ uint16_t cnt; ++ ++ qemu_cfg_select(QEMU_CFG_MAX_CPUS); ++ qemu_cfg_read((uint8_t*)&cnt, sizeof(cnt)); ++ ++ if (!cnt) ++ cnt = smp_cpus; ++ ++ return cnt; ++} ++ + uint64_t qemu_cfg_get64 (void) + { + uint64_t ret; +@@ -1655,6 +1670,11 @@ void acpi_bios_init(void) + uint16_t i, external_tables; + int nb_numa_nodes; + ++#ifdef BX_QEMU ++ max_cpus = get_max_cpus(); ++#else ++ max_cpus = smp_cpus; ++#endif + /* reserve memory space for tables */ + #ifdef BX_USE_EBDA_TABLES + ebda_cur_addr = align(ebda_cur_addr, 16); Index: qemu/pc-bios/bios-pq/0018-qemu-madt-maxcpus.patch =================================================================== --- /dev/null +++ qemu/pc-bios/bios-pq/0018-qemu-madt-maxcpus.patch @@ -0,0 +1,105 @@ +Use max_cpus when building bios tables. + +Signed-off-by: Jes Sorensen + +diff --git a/bios/rombios32.c b/bios/rombios32.c +index f4a6300..fb4d663 100644 +--- a/bios/rombios32.c ++++ b/bios/rombios32.c +@@ -1155,13 +1155,13 @@ static void mptable_init(void) + putstr(&q, "0.1 "); /* vendor id */ + putle32(&q, 0); /* OEM table ptr */ + putle16(&q, 0); /* OEM table size */ +- putle16(&q, smp_cpus + 18); /* entry count */ ++ putle16(&q, max_cpus + 18); /* entry count */ + putle32(&q, 0xfee00000); /* local APIC addr */ + putle16(&q, 0); /* ext table length */ + putb(&q, 0); /* ext table checksum */ + putb(&q, 0); /* reserved */ + +- for(i = 0; i < smp_cpus; i++) { ++ for(i = 0; i < max_cpus; i++) { + putb(&q, 0); /* entry type = processor */ + putb(&q, i); /* APIC id */ + putb(&q, 0x11); /* local APIC version number */ +@@ -1188,7 +1188,7 @@ static void mptable_init(void) + putstr(&q, "ISA "); + + /* ioapic */ +- ioapic_id = smp_cpus; ++ ioapic_id = max_cpus; + putb(&q, 2); /* entry type = I/O APIC */ + putb(&q, ioapic_id); /* apic ID */ + putb(&q, 0x11); /* I/O APIC version number */ +@@ -1588,7 +1588,7 @@ int acpi_build_processor_ssdt(uint8_t *ssdt) + { + uint8_t *ssdt_ptr = ssdt; + int i, length; +- int acpi_cpus = smp_cpus > 0xff ? 0xff : smp_cpus; ++ int acpi_cpus = max_cpus > 0xff ? 0xff : max_cpus; + + ssdt_ptr[9] = 0; // checksum; + ssdt_ptr += sizeof(struct acpi_table_header); +@@ -1725,7 +1725,7 @@ void acpi_bios_init(void) + addr = (addr + 7) & ~7; + srat_addr = addr; + srat_size = sizeof(*srat) + +- sizeof(struct srat_processor_affinity) * smp_cpus + ++ sizeof(struct srat_processor_affinity) * max_cpus + + sizeof(struct srat_memory_affinity) * (nb_numa_nodes + 2); + srat = (void *)(addr); + addr += srat_size; +@@ -1738,7 +1738,7 @@ void acpi_bios_init(void) + addr = (addr + 7) & ~7; + madt_addr = addr; + madt_size = sizeof(*madt) + +- sizeof(struct madt_processor_apic) * smp_cpus + ++ sizeof(struct madt_processor_apic) * max_cpus + + #ifdef BX_QEMU + sizeof(struct madt_io_apic) + sizeof(struct madt_int_override); + #else +@@ -1811,7 +1811,7 @@ void acpi_bios_init(void) + madt->local_apic_address = cpu_to_le32(0xfee00000); + madt->flags = cpu_to_le32(1); + apic = (void *)(madt + 1); +- for(i=0;itype = APIC_PROCESSOR; + apic->length = sizeof(*apic); + apic->processor_id = i; +@@ -1822,7 +1822,7 @@ void acpi_bios_init(void) + io_apic = (void *)apic; + io_apic->type = APIC_IO; + io_apic->length = sizeof(*io_apic); +- io_apic->io_apic_id = smp_cpus; ++ io_apic->io_apic_id = max_cpus; + io_apic->address = cpu_to_le32(0xfec00000); + io_apic->interrupt = cpu_to_le32(0); + #ifdef BX_QEMU +@@ -1856,7 +1856,7 @@ void acpi_bios_init(void) + srat->reserved1=1; + + core = (void*)(srat + 1); +- for (i = 0; i < smp_cpus; ++i) { ++ for (i = 0; i < max_cpus; ++i) { + core->type = SRAT_PROCESSOR; + core->length = sizeof(*core); + core->local_apic_id = i; +@@ -1864,7 +1864,7 @@ void acpi_bios_init(void) + core->proximity_lo = curnode; + memset (core->proximity_hi, 0, 3); + core->local_sapic_eid = 0; +- if (i < smp_cpus) ++ if (i < max_cpus) + core->flags = cpu_to_le32(1); + else + core->flags = 0; +@@ -2614,7 +2614,7 @@ void smbios_init(void) + add_struct(0, p); + add_struct(1, p); + add_struct(3, p); +- for (cpu_num = 1; cpu_num <= smp_cpus; cpu_num++) ++ for (cpu_num = 1; cpu_num <= max_cpus; cpu_num++) + add_struct(4, p, cpu_num); + + /* Each 'memory device' covers up to 16GB of address space. */ Index: qemu/pc-bios/bios-pq/series =================================================================== --- qemu.orig/pc-bios/bios-pq/series +++ qemu/pc-bios/bios-pq/series @@ -14,3 +14,5 @@ 0014_add-srat-acpi-table-support.patch 0015_enable-power-button-even-generation.patch 0016-use-correct-mask-to-size-pci-option-rom-bar.patch +0017-qemu-kvm-cfg-maxcpus.patch +0018-qemu-madt-maxcpus.patch