diff options
Diffstat (limited to 'hw/i386')
| -rw-r--r-- | hw/i386/acpi-dsdt-cpu-hotplug.dsl | 1 | ||||
| -rw-r--r-- | hw/i386/pc_piix.c | 19 | ||||
| -rw-r--r-- | hw/i386/pc_sysfw.c | 105 | ||||
| -rw-r--r-- | hw/i386/q35-acpi-dsdt.dsl | 4 |
4 files changed, 105 insertions, 24 deletions
diff --git a/hw/i386/acpi-dsdt-cpu-hotplug.dsl b/hw/i386/acpi-dsdt-cpu-hotplug.dsl index c96ac42a31..995b415bae 100644 --- a/hw/i386/acpi-dsdt-cpu-hotplug.dsl +++ b/hw/i386/acpi-dsdt-cpu-hotplug.dsl @@ -52,7 +52,6 @@ Scope(\_SB) { Sleep(200) } - /* CPU hotplug notify method */ OperationRegion(PRST, SystemIO, 0xaf00, 32) Field(PRST, ByteAcc, NoLock, Preserve) { PRS, 256 diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c index 4e0dae7981..276641436e 100644 --- a/hw/i386/pc_piix.c +++ b/hw/i386/pc_piix.c @@ -61,6 +61,11 @@ static const int ide_irq[MAX_IDE_BUS] = { 14, 15 }; static bool has_pci_info; static bool has_acpi_build = true; static bool smbios_type1_defaults = true; +/* Make sure that guest addresses aligned at 1Gbyte boundaries get mapped to + * host addresses aligned at 1Gbyte boundaries. This way we can use 1GByte + * pages in the host. + */ +static bool gigabyte_align = true; /* PC hardware initialisation */ static void pc_init1(QEMUMachineInitArgs *args, @@ -106,9 +111,17 @@ static void pc_init1(QEMUMachineInitArgs *args, kvmclock_create(); } + /* Check whether RAM fits below 4G (leaving 1/2 GByte for IO memory). + * If it doesn't, we need to split it in chunks below and above 4G. + * In any case, try to make sure that guest addresses aligned at + * 1G boundaries get mapped to host addresses aligned at 1G boundaries. + * For old machine types, use whatever split we used historically to avoid + * breaking migration. + */ if (args->ram_size >= 0xe0000000) { - above_4g_mem_size = args->ram_size - 0xe0000000; - below_4g_mem_size = 0xe0000000; + ram_addr_t lowmem = gigabyte_align ? 0xc0000000 : 0xe0000000; + above_4g_mem_size = args->ram_size - lowmem; + below_4g_mem_size = lowmem; } else { above_4g_mem_size = 0; below_4g_mem_size = args->ram_size; @@ -157,6 +170,7 @@ static void pc_init1(QEMUMachineInitArgs *args, if (pci_enabled) { pci_bus = i440fx_init(&i440fx_state, &piix3_devfn, &isa_bus, gsi, system_memory, system_io, args->ram_size, + below_4g_mem_size, above_4g_mem_size, pci_memory, ram_memory); } else { @@ -245,6 +259,7 @@ static void pc_init_pci(QEMUMachineInitArgs *args) static void pc_compat_1_7(QEMUMachineInitArgs *args) { smbios_type1_defaults = false; + gigabyte_align = false; } static void pc_compat_1_6(QEMUMachineInitArgs *args) diff --git a/hw/i386/pc_sysfw.c b/hw/i386/pc_sysfw.c index e917c83540..75a7ebbaa7 100644 --- a/hw/i386/pc_sysfw.c +++ b/hw/i386/pc_sysfw.c @@ -72,35 +72,102 @@ static void pc_isa_bios_init(MemoryRegion *rom_memory, memory_region_set_readonly(isa_bios, true); } -static void pc_system_flash_init(MemoryRegion *rom_memory, - DriveInfo *pflash_drv) +#define FLASH_MAP_UNIT_MAX 2 + +/* We don't have a theoretically justifiable exact lower bound on the base + * address of any flash mapping. In practice, the IO-APIC MMIO range is + * [0xFEE00000..0xFEE01000[ -- see IO_APIC_DEFAULT_ADDRESS --, leaving free + * only 18MB-4KB below 4G. For now, restrict the cumulative mapping to 8MB in + * size. + */ +#define FLASH_MAP_BASE_MIN ((hwaddr)(0x100000000ULL - 8*1024*1024)) + +/* This function maps flash drives from 4G downward, in order of their unit + * numbers. The mapping starts at unit#0, with unit number increments of 1, and + * stops before the first missing flash drive, or before + * unit#FLASH_MAP_UNIT_MAX, whichever is reached first. + * + * Addressing within one flash drive is of course not reversed. + * + * An error message is printed and the process exits if: + * - the size of the backing file for a flash drive is non-positive, or not a + * multiple of the required sector size, or + * - the current mapping's base address would fall below FLASH_MAP_BASE_MIN. + * + * The drive with unit#0 (if available) is mapped at the highest address, and + * it is passed to pc_isa_bios_init(). Merging several drives for isa-bios is + * not supported. + */ +static void pc_system_flash_init(MemoryRegion *rom_memory) { + int unit; + DriveInfo *pflash_drv; BlockDriverState *bdrv; int64_t size; - hwaddr phys_addr; + char *fatal_errmsg = NULL; + hwaddr phys_addr = 0x100000000ULL; int sector_bits, sector_size; pflash_t *system_flash; MemoryRegion *flash_mem; + char name[64]; - bdrv = pflash_drv->bdrv; - size = bdrv_getlength(pflash_drv->bdrv); sector_bits = 12; sector_size = 1 << sector_bits; - if ((size % sector_size) != 0) { - fprintf(stderr, - "qemu: PC system firmware (pflash) must be a multiple of 0x%x\n", - sector_size); - exit(1); + for (unit = 0; + (unit < FLASH_MAP_UNIT_MAX && + (pflash_drv = drive_get(IF_PFLASH, 0, unit)) != NULL); + ++unit) { + bdrv = pflash_drv->bdrv; + size = bdrv_getlength(bdrv); + if (size < 0) { + fatal_errmsg = g_strdup_printf("failed to get backing file size"); + } else if (size == 0) { + fatal_errmsg = g_strdup_printf("PC system firmware (pflash) " + "cannot have zero size"); + } else if ((size % sector_size) != 0) { + fatal_errmsg = g_strdup_printf("PC system firmware (pflash) " + "must be a multiple of 0x%x", sector_size); + } else if (phys_addr < size || phys_addr - size < FLASH_MAP_BASE_MIN) { + fatal_errmsg = g_strdup_printf("oversized backing file, pflash " + "segments cannot be mapped under " + TARGET_FMT_plx, FLASH_MAP_BASE_MIN); + } + if (fatal_errmsg != NULL) { + Location loc; + + /* push a new, "none" location on the location stack; overwrite its + * contents with the location saved in the option; print the error + * (includes location); pop the top + */ + loc_push_none(&loc); + if (pflash_drv->opts != NULL) { + qemu_opts_loc_restore(pflash_drv->opts); + } + error_report("%s", fatal_errmsg); + loc_pop(&loc); + g_free(fatal_errmsg); + exit(1); + } + + phys_addr -= size; + + /* pflash_cfi01_register() creates a deep copy of the name */ + snprintf(name, sizeof name, "system.flash%d", unit); + system_flash = pflash_cfi01_register(phys_addr, NULL /* qdev */, name, + size, bdrv, sector_size, + size >> sector_bits, + 1 /* width */, + 0x0000 /* id0 */, + 0x0000 /* id1 */, + 0x0000 /* id2 */, + 0x0000 /* id3 */, + 0 /* be */); + if (unit == 0) { + flash_mem = pflash_cfi01_get_memory(system_flash); + pc_isa_bios_init(rom_memory, flash_mem, size); + } } - - phys_addr = 0x100000000ULL - size; - system_flash = pflash_cfi01_register(phys_addr, NULL, "system.flash", size, - bdrv, sector_size, size >> sector_bits, - 1, 0x0000, 0x0000, 0x0000, 0x0000, 0); - flash_mem = pflash_cfi01_get_memory(system_flash); - - pc_isa_bios_init(rom_memory, flash_mem, size); } static void old_pc_system_rom_init(MemoryRegion *rom_memory, bool isapc_ram_fw) @@ -181,5 +248,5 @@ void pc_system_firmware_init(MemoryRegion *rom_memory, bool isapc_ram_fw) exit(1); } - pc_system_flash_init(rom_memory, pflash_drv); + pc_system_flash_init(rom_memory); } diff --git a/hw/i386/q35-acpi-dsdt.dsl b/hw/i386/q35-acpi-dsdt.dsl index 575c5d7376..7934a9ddfb 100644 --- a/hw/i386/q35-acpi-dsdt.dsl +++ b/hw/i386/q35-acpi-dsdt.dsl @@ -417,11 +417,11 @@ DefinitionBlock ( Method(_L00) { } Method(_L01) { + } + Method(_E02) { // CPU hotplug event \_SB.PRSC() } - Method(_L02) { - } Method(_L03) { } Method(_L04) { |