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hv: add memory allocation functions for trampoline code relocation

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emalloc_for_low_mem() is used if CONFIG_EFI_STUB is defined.
e820_alloc_low_memory() is used for other cases

In either case, the allocated memory will be marked with E820_TYPE_RESERVED

Signed-off-by: Zheng, Gen <gen.zheng@intel.com>
Signed-off-by: Jason Chen CJ <jason.cj.chen@intel.com>
Signed-off-by: Zide Chen <zide.chen@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
Acked-by: Xu, Anthony <anthony.xu@intel.com>
This commit is contained in:
Zide Chen
2018-05-02 23:21:07 -07:00
committed by lijinxia
parent 1f074a2f2a
commit 77580edff0
4 changed files with 114 additions and 0 deletions
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59
hypervisor/bsp/uefi/efi/malloc.c
View File

@@ -164,6 +164,65 @@ fail:
return err;
}
EFI_STATUS emalloc_for_low_mem(EFI_PHYSICAL_ADDRESS *addr, UINTN size)
{
UINTN map_size, map_key, desc_size;
EFI_MEMORY_DESCRIPTOR *map_buf;
UINTN d, map_end;
UINT32 desc_version;
EFI_STATUS err;
UINTN nr_pages = EFI_SIZE_TO_PAGES(size);
err = memory_map(&map_buf, &map_size, &map_key,
&desc_size, &desc_version);
if (err != EFI_SUCCESS)
goto fail;
d = (UINTN)map_buf;
map_end = (UINTN)map_buf + map_size;
for (; d < map_end; d += desc_size) {
EFI_MEMORY_DESCRIPTOR *desc;
EFI_PHYSICAL_ADDRESS start, end, aligned;
desc = (EFI_MEMORY_DESCRIPTOR *)d;
if (desc->Type != EfiConventionalMemory)
continue;
if (desc->NumberOfPages < nr_pages)
continue;
start = desc->PhysicalStart;
end = start + (desc->NumberOfPages << EFI_PAGE_SHIFT);
size = nr_pages << EFI_PAGE_SHIFT;
/* allocate in low memory only */
if (start >= 1 << 20)
continue;
if (end > 1 << 20)
end = (1 << 20);
if (end - start >= size) {
aligned = end - size;
err = allocate_pages(AllocateAddress, EfiReservedMemoryType,
nr_pages, &aligned);
if (err == EFI_SUCCESS) {
*addr = aligned;
break;
}
}
}
if (d == map_end)
err = EFI_OUT_OF_RESOURCES;
free_pool(map_buf);
fail:
return err;
}
/* FIXME: This function cannot guarantee to return address under 4G,
* and the hypervisor cannot handle params, which address is above 4G,
* delivered from efi stub.

1
hypervisor/bsp/uefi/efi/stdlib.h
View File

@@ -50,6 +50,7 @@ extern void *calloc(UINTN nmemb, UINTN size);
extern EFI_STATUS emalloc(UINTN, UINTN, EFI_PHYSICAL_ADDRESS *);
extern EFI_STATUS __emalloc(UINTN, UINTN, EFI_PHYSICAL_ADDRESS *, EFI_MEMORY_TYPE);
extern EFI_STATUS emalloc_for_low_mem(EFI_PHYSICAL_ADDRESS *addr, UINTN size);
extern void efree(EFI_PHYSICAL_ADDRESS, UINTN);
static inline void memset(void *dstv, char ch, UINTN size)