diff options
| -rw-r--r-- | hw/i386/pc.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/hw/i386/pc.c b/hw/i386/pc.c index ebc27e4..56d8c17 100644 --- a/hw/i386/pc.c +++ b/hw/i386/pc.c @@ -879,6 +879,18 @@ static uint64_t pc_get_cxl_range_end(PCMachineState *pcms) return start; } +static hwaddr pc_max_used_gpa(PCMachineState *pcms, uint64_t pci_hole64_size) +{ + X86CPU *cpu = X86_CPU(first_cpu); + + /* 32-bit systems don't have hole64 thus return max CPU address */ + if (cpu->phys_bits <= 32) { + return ((hwaddr)1 << cpu->phys_bits) - 1; + } + + return pc_pci_hole64_start() + pci_hole64_size - 1; +} + void pc_memory_init(PCMachineState *pcms, MemoryRegion *system_memory, MemoryRegion *rom_memory, @@ -893,7 +905,9 @@ void pc_memory_init(PCMachineState *pcms, MachineClass *mc = MACHINE_GET_CLASS(machine); PCMachineClass *pcmc = PC_MACHINE_GET_CLASS(pcms); X86MachineState *x86ms = X86_MACHINE(pcms); + hwaddr maxphysaddr, maxusedaddr; hwaddr cxl_base, cxl_resv_end = 0; + X86CPU *cpu = X86_CPU(first_cpu); assert(machine->ram_size == x86ms->below_4g_mem_size + x86ms->above_4g_mem_size); @@ -901,6 +915,19 @@ void pc_memory_init(PCMachineState *pcms, linux_boot = (machine->kernel_filename != NULL); /* + * phys-bits is required to be appropriately configured + * to make sure max used GPA is reachable. + */ + maxusedaddr = pc_max_used_gpa(pcms, pci_hole64_size); + maxphysaddr = ((hwaddr)1 << cpu->phys_bits) - 1; + if (maxphysaddr < maxusedaddr) { + error_report("Address space limit 0x%"PRIx64" < 0x%"PRIx64 + " phys-bits too low (%u)", + maxphysaddr, maxusedaddr, cpu->phys_bits); + exit(EXIT_FAILURE); + } + + /* * Split single memory region and use aliases to address portions of it, * done for backwards compatibility with older qemus. */ |