acrn-hypervisor

mirror of https://github.com/projectacrn/acrn-hypervisor.git synced 2025-12-17 18:32:40 +00:00

Files

Victor Sun f66517e913 HV: place kernel and ramdisk by find_space_from_ve820()

We should not hardcode the VM ramdisk load address right after kernel
load address because of two reasons:
	1. Per Linux kernel boot protocol, the Kernel need a size of
	   contiguous memory(i.e. init_size field in zeropage) from
	   its load address to boot, then the address would overlap
	   with ramdisk;
	2. The hardcoded address could not be ensured as a valid address
	   in guest e820 table, especially with a huge ramdisk;

Also we should not hardcode the VM kernel load address to its pref_address
which work for non-relocatable kernel only. For a relocatable kernel,
it could run from any valid address where bootloader load to.

The patch will set the VM kernel and ramdisk load address by scanning
guest e820 table with find_space_from_ve820() api:
	1. For SOS VM, the ramdisk has been loaded by multiboot bootloader
	   already so set the load address as module source address,
	   the relocatable kernel would be relocated to a higher address
	   after hypervisor and all multiboot modules to avoid guest
	   memory copy corruption;
	2. For pre-launched VM, the kernel would be loaded to pref_address
	   first. If kernel end address is higher than maximum ramdisk
	   address limit, hypervisor would try to locate ramdisk load
	   address from 0x100000 to kernel load address; If kernel end
	   address is lower than maximum ramdisk address limit, hypervisor
	   would try to locate ramdisk address from kernel end address
	   to the maximum ramdisk address limit under 4GB;

Tracked-On: #5879

Signed-off-by: Victor Sun <victor.sun@intel.com>
Reviewed-by: Jason Chen CJ <jason.cj.chen@intel.com>

2021-06-04 16:29:33 +08:00

delay.c

hv/mod_timer: separate delay functions from the timer module

2021-05-18 16:43:28 +08:00

efi_mmap.c

HV: add efi memory map parsing function

2021-06-04 16:29:33 +08:00

event.c

hv: mod: do not use explicit arch name when including headers

2021-05-08 11:15:46 +08:00

hv_main.c

hv: mod: do not use explicit arch name when including headers