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lmb: move lmb_map_update_notify() to EFI

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When building with qemu_arm64_defconfig with CONFIG_CC_OPTIMIZE_FOR_DEBUG=y
and CONFIG_EFI_LOADER=n an error undefined reference to efi_add_memory_map_pg
occurs.

Move the EFI dependent part of lmb_map_update_notify() to the EFI
sub-system.

Reported-by: Liya Huang <1425075683@qq.com>
Acked-by: Liya Huang <1425075683@qq.com>
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
This commit is contained in:
Heinrich Schuchardt 2025-02-16 12:12:40 +01:00
parent 08573d7688
commit 41d5734442
3 changed files with 45 additions and 28 deletions
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15
include/efi_loader.h
View file

@ -1263,6 +1263,21 @@ efi_status_t efi_disk_get_device_name(const efi_handle_t handle, char *buf, int
*/
void efi_add_known_memory(void);
/**
* efi_map_update_notify() - notify EFI of memory map changes
*
* @addr: start of memory area
* @size: size of memory area
* @op: type of change
* Return: 0 if change could be processed
*/
#ifdef CONFIG_EFI_LOADER
int efi_map_update_notify(phys_addr_t addr, phys_size_t size,
enum lmb_map_op op);
#else
#define efi_map_update_notify(addr, size, op) (0)
#endif
/**
* efi_load_option_dp_join() - join device-paths for load option
*

27
lib/efi_loader/efi_memory.c
View file

@ -865,3 +865,30 @@ int efi_memory_init(void)
return 0;
}
int efi_map_update_notify(phys_addr_t addr, phys_size_t size,
enum lmb_map_op op)
{
u64 efi_addr;
u64 pages;
efi_status_t status;
efi_addr = (uintptr_t)map_sysmem(addr, 0);
pages = efi_size_in_pages(size + (efi_addr & EFI_PAGE_MASK));
efi_addr &= ~EFI_PAGE_MASK;
status = efi_add_memory_map_pg(efi_addr, pages,
op == LMB_MAP_OP_RESERVE ?
EFI_BOOT_SERVICES_DATA :
EFI_CONVENTIONAL_MEMORY,
false);
if (status != EFI_SUCCESS) {
log_err("LMB Map notify failure %lu\n",
status & ~EFI_ERROR_MASK);
return -1;
}
unmap_sysmem((void *)(uintptr_t)efi_addr);
return 0;
}

31
lib/lmb.c
View file

@ -426,37 +426,12 @@ long io_lmb_free(struct lmb *io_lmb, phys_addr_t base, phys_size_t size)
static struct lmb lmb;
static bool lmb_should_notify(u32 flags)
{
return !lmb.test && !(flags & LMB_NONOTIFY) &&
CONFIG_IS_ENABLED(EFI_LOADER);
}
static int lmb_map_update_notify(phys_addr_t addr, phys_size_t size,
enum lmb_map_op op, u32 flags)
{
u64 efi_addr;
u64 pages;
efi_status_t status;
if (!lmb_should_notify(flags))
return 0;
efi_addr = (uintptr_t)map_sysmem(addr, 0);
pages = efi_size_in_pages(size + (efi_addr & EFI_PAGE_MASK));
efi_addr &= ~EFI_PAGE_MASK;
status = efi_add_memory_map_pg(efi_addr, pages,
op == LMB_MAP_OP_RESERVE ?
EFI_BOOT_SERVICES_DATA :
EFI_CONVENTIONAL_MEMORY,
false);
if (status != EFI_SUCCESS) {
log_err("%s: LMB Map notify failure %lu\n", __func__,
status & ~EFI_ERROR_MASK);
return -1;
}
unmap_sysmem((void *)(uintptr_t)efi_addr);
if (CONFIG_IS_ENABLED(EFI_LOADER) &&
!lmb.test && !(flags & LMB_NONOTIFY))
return efi_map_update_notify(addr, size, op);
return 0;
}