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QEMU BOCHS bios patches to use maxcpus value.

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Signed-off-by: Jes Sorensen <jes@sgi.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Jes Sorensen 2009-07-23 17:03:43 +02:00 committed by Anthony Liguori
parent 6be68d7eb9
commit baef8a666c
4 changed files with 181 additions and 0 deletions
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62
pc-bios/bios-pq/0020-qemu-kvm-cfg-maxcpus.patch Normal file
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@ -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) {

117
pc-bios/bios-pq/0021-qemu-madt-maxcpus.patch Normal file
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@ -0,0 +1,117 @@
Use max_cpus when building bios tables.
Signed-off-by: Jes Sorensen <jes@sgi.com>
diff --git a/bios/rombios32.c b/bios/rombios32.c
index e6bb164..3d15283 100644
--- a/bios/rombios32.c
+++ b/bios/rombios32.c
@@ -1145,23 +1145,25 @@ static void mptable_init(void)
putle32(&q, 0); /* OEM table ptr */
putle16(&q, 0); /* OEM table size */
#ifdef BX_QEMU
- putle16(&q, smp_cpus + 17); /* entry count */
+ putle16(&q, max_cpus + 17); /* entry count */
#else
- putle16(&q, smp_cpus + 18); /* entry count */
+ putle16(&q, max_cpus + 18); /* entry count */
#endif
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 */
if (i == 0)
putb(&q, 3); /* cpu flags: enabled, bootstrap cpu */
- else
+ else if (i < smp_cpus)
putb(&q, 1); /* cpu flags: enabled */
+ else
+ putb(&q, 0); /* cpu flags: disabled */
putb(&q, 0); /* cpu signature */
putb(&q, 6);
putb(&q, 0);
@@ -1181,7 +1183,7 @@ 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 */
@@ -1581,7 +1583,7 @@ 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);
@@ -1713,7 +1715,7 @@ 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;
@@ -1726,7 +1728,7 @@ 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
@@ -1799,18 +1801,21 @@ 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;i<smp_cpus;i++) {
+ for(i = 0;i < max_cpus; i++) {
apic->type = APIC_PROCESSOR;
apic->length = sizeof(*apic);
apic->processor_id = i;
apic->local_apic_id = i;
- apic->flags = cpu_to_le32(1);
+ if (i < smp_cpus)
+ apic->flags = cpu_to_le32(1);
+ else
+ apic->flags = 0;
apic++;
}
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
@@ -1844,7 +1849,7 @@ 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;
@@ -2603,7 +2608,7 @@ 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. */

2
pc-bios/bios-pq/series
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@ -17,3 +17,5 @@
0017-bochs-bios-Move-QEMU_CFG-constants-to-rombios.h.patch
0018-bochs-bios-Make-boot-prompt-optional.patch
0019-bios-fix-multiple-calls.patch
0020-qemu-kvm-cfg-maxcpus.patch
0021-qemu-madt-maxcpus.patch

BIN
pc-bios/bios.bin
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