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qemu: support xen hvm direct kernel boot 

qemu side patch to support xen HVM direct kernel boot:
if -kernel exists, calls xen_load_linux(), which will read kernel/initrd
and add a linuxboot.bin or multiboot.bin option rom. The
linuxboot.bin/multiboot.bin will load kernel/initrd and jump to execute
kernel directly. It's working when xen uses seabios.

During this work, found the 'kvmvapic' is in option_rom list, it should
not be there in xen case. Set s->vapic_control = 0 in xen_apic_realize()
to handle that.

Signed-off-by: Chunyan Liu <cyliu@suse.com>
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Chunyan Liu 2014-07-07 14:34:35 +08:00 committed by Stefano Stabellini
parent 8677de2b4d
commit b33a5bbfba
4 changed files with 38 additions and 0 deletions
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25
hw/i386/pc.c
View File

@ -1190,6 +1190,31 @@ void pc_acpi_init(const char *default_dsdt)
}
}
FWCfgState *xen_load_linux(const char *kernel_filename,
const char *kernel_cmdline,
const char *initrd_filename,
ram_addr_t below_4g_mem_size,
PcGuestInfo *guest_info)
{
int i;
FWCfgState *fw_cfg;
assert(kernel_filename != NULL);
fw_cfg = fw_cfg_init(BIOS_CFG_IOPORT, BIOS_CFG_IOPORT + 1, 0, 0);
rom_set_fw(fw_cfg);
load_linux(fw_cfg, kernel_filename, initrd_filename,
kernel_cmdline, below_4g_mem_size);
for (i = 0; i < nb_option_roms; i++) {
assert(!strcmp(option_rom[i].name, "linuxboot.bin") ||
!strcmp(option_rom[i].name, "multiboot.bin"));
rom_add_option(option_rom[i].name, option_rom[i].bootindex);
}
guest_info->fw_cfg = fw_cfg;
return fw_cfg;
}
FWCfgState *pc_memory_init(MachineState *machine,
MemoryRegion *system_memory,
ram_addr_t below_4g_mem_size,

7
hw/i386/pc_piix.c
View File

@ -182,6 +182,13 @@ static void pc_init1(MachineState *machine,
fw_cfg = pc_memory_init(machine, system_memory,
below_4g_mem_size, above_4g_mem_size,
rom_memory, &ram_memory, guest_info);
} else if (machine->kernel_filename != NULL) {
/* For xen HVM direct kernel boot, load linux here */
fw_cfg = xen_load_linux(machine->kernel_filename,
machine->kernel_cmdline,
machine->initrd_filename,
below_4g_mem_size,
guest_info);
}
gsi_state = g_malloc0(sizeof(*gsi_state));

1
hw/i386/xen/xen_apic.c
View File

@ -40,6 +40,7 @@ static void xen_apic_realize(DeviceState *dev, Error **errp)
{
APICCommonState *s = APIC_COMMON(dev);
s->vapic_control = 0;
memory_region_init_io(&s->io_memory, OBJECT(s), &xen_apic_io_ops, s,
"xen-apic-msi", APIC_SPACE_SIZE);

5
include/hw/i386/pc.h
View File

@ -188,6 +188,11 @@ PcGuestInfo *pc_guest_info_init(ram_addr_t below_4g_mem_size,
void pc_pci_as_mapping_init(Object *owner, MemoryRegion *system_memory,
MemoryRegion *pci_address_space);
FWCfgState *xen_load_linux(const char *kernel_filename,
const char *kernel_cmdline,
const char *initrd_filename,
ram_addr_t below_4g_mem_size,
PcGuestInfo *guest_info);
FWCfgState *pc_memory_init(MachineState *machine,
MemoryRegion *system_memory,
ram_addr_t below_4g_mem_size,