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HV:EFI-STUB:UEFI loader name supporting

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In the current design, UEFI loader name is not supported,
it is hard to ditinguish UEFI boot loader (efi stub in
the code) from other multiboot compiliant boot loader (such
as SBL, ABL, GRUB etc) explicitly. From long term, it is
better that detect boot loader according to loader name and
use different boot method according to different boot loader
and VM configuration flag.

Allocate memory to store UEFI loader name statically, set
MULTIBOOT_INFO_BOOT_LOADER_NAME in flag of the multiboot header,
store host physical start address of loader name in the multiboot
header according to multiboot protocol.

V5-->V6:
	Update "Tracked-On"

Tracked-On: #2944

Signed-off-by: Xiangyang Wu <xiangyang.wu@linux.intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Xiangyang Wu
2019-04-15 22:42:56 +08:00
committed by ACRN System Integration
parent 048d72fd94
commit a13c19b450
2 changed files with 17 additions and 2 deletions
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11
efi-stub/boot.c
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@@ -247,6 +247,8 @@ switch_to_guest_mode(EFI_HANDLE image, EFI_PHYSICAL_ADDRESS hv_hpa)
struct acpi_table_rsdp *rsdp = NULL;
int32_t i;
EFI_CONFIGURATION_TABLE *config_table;
char *uefi_boot_loader_name;
const char loader_name[BOOT_LOADER_NAME_SIZE] = UEFI_BOOT_LOADER_NAME;
err = allocate_pool(EfiLoaderData, EFI_BOOT_MEM_SIZE, (VOID *)&addr);
if (err != EFI_SUCCESS) {
@@ -259,6 +261,9 @@ switch_to_guest_mode(EFI_HANDLE image, EFI_PHYSICAL_ADDRESS hv_hpa)
mbi = MBOOT_INFO_PTR(addr);
efi_ctx = BOOT_CTX_PTR(addr);
uefi_boot_loader_name = BOOT_LOADER_NAME_PTR(addr);
memcpy(uefi_boot_loader_name, loader_name, BOOT_LOADER_NAME_SIZE);
/* reserve secondary memory region for CPU trampoline code */
err = emalloc_reserved_mem(&addr, CONFIG_LOW_RAM_SIZE, MEM_ADDR_1MB);
if (err != EFI_SUCCESS)
@@ -302,6 +307,12 @@ switch_to_guest_mode(EFI_HANDLE image, EFI_PHYSICAL_ADDRESS hv_hpa)
mbi->mi_flags |= MULTIBOOT_INFO_HAS_DRIVES;
mbi->mi_drives_addr = (UINT32)(UINTN)efi_ctx;
/* Set boot loader name in the multiboot header of UEFI, this name is used by hypervisor;
* The host physical start address of boot loader name is stored in multiboot header.
*/
mbi->mi_flags |= MULTIBOOT_INFO_HAS_LOADER_NAME;
mbi->mi_loader_name = (UINT32)uefi_boot_loader_name;
asm volatile ("pushf\n\t"
"pop %0\n\t"
: "=r"(efi_ctx->vcpu_regs.rflags)