diff options
Diffstat (limited to 'tools/ioemu/hw/pc.c')
| -rw-r--r-- | tools/ioemu/hw/pc.c | 19 |
1 files changed, 8 insertions, 11 deletions
diff --git a/tools/ioemu/hw/pc.c b/tools/ioemu/hw/pc.c index fc25a4224e..999b4f4e9e 100644 --- a/tools/ioemu/hw/pc.c +++ b/tools/ioemu/hw/pc.c @@ -31,9 +31,6 @@ #define VGABIOS_CIRRUS_FILENAME "vgabios-cirrus.bin" #define LINUX_BOOT_FILENAME "linux_boot.bin" -/* Leave a chunk of memory at the top of RAM for the BIOS ACPI tables. */ -#define ACPI_DATA_SIZE 0x10000 - static fdctrl_t *floppy_controller; static RTCState *rtc_state; #ifndef CONFIG_DM @@ -542,6 +539,7 @@ static void load_linux(const char *kernel_filename, uint16_t seg[6]; uint16_t real_seg; int setup_size, kernel_size, initrd_size, cmdline_size; + unsigned long end_low_ram; uint32_t initrd_max; uint8_t header[1024]; target_phys_addr_t real_addr, reloc_prot_addr, prot_addr, cmdline_addr, initrd_addr; @@ -595,15 +593,14 @@ static void load_linux(const char *kernel_filename, (size_t)cmdline_addr, (size_t)prot_addr); - /* highest address for loading the initrd */ - if (protocol >= 0x203) - initrd_max = ldl_p(header+0x22c); - else - initrd_max = 0x37ffffff; - - if (initrd_max >= ram_size-ACPI_DATA_SIZE) - initrd_max = ram_size-ACPI_DATA_SIZE-1; + /* Special pages are placed at end of low RAM: pick an arbitrary one and + * subtract a suitably large amount of padding (64kB) to skip BIOS data. */ + xc_get_hvm_param(xc_handle, domid, HVM_PARAM_BUFIOREQ_PFN, &end_low_ram); + end_low_ram = (end_low_ram << 12) - (64*1024); + /* highest address for loading the initrd */ + initrd_max = (protocol >= 0x203) ? ldl_p(header+0x22c) : 0x37ffffff; + initrd_max = MIN(initrd_max, (uint32_t)end_low_ram); /* kernel command line */ ncmdline = strlen(kernel_cmdline); |