diff options
Diffstat (limited to 'pc-bios/bios-pq/0020-qemu-kvm-cfg-maxcpus.patch')
| -rw-r--r-- | pc-bios/bios-pq/0020-qemu-kvm-cfg-maxcpus.patch | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/pc-bios/bios-pq/0020-qemu-kvm-cfg-maxcpus.patch b/pc-bios/bios-pq/0020-qemu-kvm-cfg-maxcpus.patch new file mode 100644 index 0000000..50e9b8c --- /dev/null +++ b/pc-bios/bios-pq/0020-qemu-kvm-cfg-maxcpus.patch @@ -0,0 +1,62 @@ +Read max_cpus variable from QEMU_CFG. If not provided, use value of +smp_cpus. + +Signed-off-by: Jes Sorensen <jes@sgi.com> + +diff --git a/bios/rombios.h b/bios/rombios.h +index 8ece2ee..dbf3bd3 100644 +--- a/bios/rombios.h ++++ b/bios/rombios.h +@@ -65,6 +65,7 @@ + #define QEMU_CFG_UUID 0x02 + #define QEMU_CFG_NUMA 0x0d + #define QEMU_CFG_BOOT_MENU 0x0e ++#define QEMU_CFG_MAX_CPUS 0x0f + #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) +diff --git a/bios/rombios32.c b/bios/rombios32.c +index 69e82b1..610fc1f 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; +@@ -526,6 +527,19 @@ 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; +@@ -2689,6 +2703,12 @@ void rombios32_init(uint32_t *s3_resume_vector, uint8_t *shutdown_flag) + + smp_probe(); + ++#ifdef BX_QEMU ++ max_cpus = get_max_cpus(); ++#else ++ max_cpus = smp_cpus; ++#endif ++ + find_bios_table_area(); + + if (*shutdown_flag == 0xfe) { |
