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HV: save efi_ctx into HV to use after init_paging()

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efi_ctx is passed by EFI stub to hypervisor. The memory was allocated
right after HV binary and marked as Efireserved. But HV is doing a 2MB
alignment in init_paging() and might overwrite the efi_ctx struct or
change the page table attribute. Now, EFI STUB uses Efiloaderdata type
memory and the memory can be re-use by hypervisor/sos after boot time
done. HV should save itself a copy if the content is still needed after
init_paging().

Tracked-On: #2035
Signed-off-by: Chaohong guo <chaohong.guo@intel.com>
This commit is contained in:
Chaohong guo 2019-01-22 11:00:19 +08:00 committed by wenlingz
parent 3fee32c0bb
commit b3b34fe2ad
1 changed files with 6 additions and 7 deletions
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13
hypervisor/bsp/uefi/uefi.c
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@ -12,7 +12,7 @@
#ifdef CONFIG_EFI_STUB
static void efi_init(void);
struct efi_context* efi_ctx = NULL;
struct efi_context efi_ctx;
struct lapic_regs uefi_lapic_regs;
static int32_t efi_initialized;
@ -52,9 +52,9 @@ int32_t uefi_sw_loader(struct acrn_vm *vm)
* init bsp with boot_context.
*/
memcpy_s(&(vcpu_regs->gprs), sizeof(struct acrn_gp_regs),
&(efi_ctx->vcpu_regs.gprs), sizeof(struct acrn_gp_regs));
&(efi_ctx.vcpu_regs.gprs), sizeof(struct acrn_gp_regs));
vcpu_regs->rip = efi_ctx->vcpu_regs.rip;
vcpu_regs->rip = efi_ctx.vcpu_regs.rip;
set_vcpu_regs(vcpu, vcpu_regs);
/* defer irq enabling till vlapic is ready */
@ -68,12 +68,12 @@ void *get_rsdp_from_uefi(void)
if (!efi_initialized)
efi_init();
return hpa2hva((uint64_t)efi_ctx->rsdp);
return hpa2hva((uint64_t)efi_ctx.rsdp);
}
void *get_ap_trampoline_buf(void)
{
return efi_ctx->ap_trampoline_buf;
return efi_ctx.ap_trampoline_buf;
}
static void efi_init(void)
@ -89,8 +89,7 @@ static void efi_init(void)
if (!(mbi->mi_flags & MULTIBOOT_INFO_HAS_DRIVES))
ASSERT(0, "no multiboot drivers for uefi found");
efi_ctx = (struct efi_context *)hpa2hva((uint64_t)mbi->mi_drives_addr);
ASSERT(efi_ctx != NULL, "no uefi context found");
memcpy_s(&efi_ctx, sizeof(struct efi_context), hpa2hva((uint64_t)mbi->mi_drives_addr), sizeof(struct efi_context));
vm_sw_loader = uefi_sw_loader;