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A set of EFI fixes: 

- Prevent memblock and I/O reserved resources to get out of sync when EFI
     memreserve is in use.
 
   - Don't claim a non-existing table is invalid
 
   - Don't warn when firmware memory is already reserved correctly
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Merge tag 'efi-urgent-2021-07-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull EFI fixes from Thomas Gleixner:
 "A set of EFI fixes:

   - Prevent memblock and I/O reserved resources to get out of sync when
     EFI memreserve is in use.

   - Don't claim a non-existing table is invalid

   - Don't warn when firmware memory is already reserved correctly"

* tag 'efi-urgent-2021-07-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  efi/mokvar: Reserve the table only if it is in boot services data
  efi/libstub: Fix the efi_load_initrd function description
  firmware/efi: Tell memblock about EFI iomem reservations
  efi/tpm: Differentiate missing and invalid final event log table.
This commit is contained in:
Linus Torvalds 2021-07-25 10:04:27 -07:00
parent 9041a4d2ee ddab1e71d2
commit e049597e7e
4 changed files with 23 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/firmware/efi/efi.c
View File

@ -896,6 +896,7 @@ static int __init efi_memreserve_map_root(void)
static int efi_mem_reserve_iomem(phys_addr_t addr, u64 size)
{
struct resource *res, *parent;
int ret;
res = kzalloc(sizeof(struct resource), GFP_ATOMIC);
if (!res)
@ -908,7 +909,17 @@ static int efi_mem_reserve_iomem(phys_addr_t addr, u64 size)
/* we expect a conflict with a 'System RAM' region */
parent = request_resource_conflict(&iomem_resource, res);
return parent ? request_resource(parent, res) : 0;
ret = parent ? request_resource(parent, res) : 0;
/*
* Given that efi_mem_reserve_iomem() can be called at any
* time, only call memblock_reserve() if the architecture
* keeps the infrastructure around.
*/
if (IS_ENABLED(CONFIG_ARCH_KEEP_MEMBLOCK) && !ret)
memblock_reserve(addr, size);
return ret;
}
int __ref efi_mem_reserve_persistent(phys_addr_t addr, u64 size)

4
drivers/firmware/efi/libstub/efi-stub-helper.c
View File

@ -630,8 +630,8 @@ efi_status_t efi_load_initrd_cmdline(efi_loaded_image_t *image,
* @image: EFI loaded image protocol
* @load_addr: pointer to loaded initrd
* @load_size: size of loaded initrd
* @soft_limit: preferred size of allocated memory for loading the initrd
* @hard_limit: minimum size of allocated memory
* @soft_limit: preferred address for loading the initrd
* @hard_limit: upper limit address for loading the initrd
*
* Return: status code
*/

5
drivers/firmware/efi/mokvar-table.c
View File

@ -180,7 +180,10 @@ void __init efi_mokvar_table_init(void)
pr_err("EFI MOKvar config table is not valid\n");
return;
}
efi_mem_reserve(efi.mokvar_table, map_size_needed);
if (md.type == EFI_BOOT_SERVICES_DATA)
efi_mem_reserve(efi.mokvar_table, map_size_needed);
efi_mokvar_table_size = map_size_needed;
}

8
drivers/firmware/efi/tpm.c
View File

@ -62,9 +62,11 @@ int __init efi_tpm_eventlog_init(void)
tbl_size = sizeof(*log_tbl) + log_tbl->size;
memblock_reserve(efi.tpm_log, tbl_size);
if (efi.tpm_final_log == EFI_INVALID_TABLE_ADDR ||
log_tbl->version != EFI_TCG2_EVENT_LOG_FORMAT_TCG_2) {
pr_warn(FW_BUG "TPM Final Events table missing or invalid\n");
if (efi.tpm_final_log == EFI_INVALID_TABLE_ADDR) {
pr_info("TPM Final Events table not present\n");
goto out;
} else if (log_tbl->version != EFI_TCG2_EVENT_LOG_FORMAT_TCG_2) {
pr_warn(FW_BUG "TPM Final Events table invalid\n");
goto out;
}