diff options
| author | Ard Biesheuvel <ardb@kernel.org> | 2020-01-23 13:10:25 +0100 |
|---|---|---|
| committer | Ard Biesheuvel <ardb@kernel.org> | 2020-02-23 21:59:42 +0100 |
| commit | fe4db90a80cd12ebe4efe385d40d6636330149ed (patch) | |
| tree | 4b6acd9cb68f1fbb30b05493022c96b1b1a74979 /drivers/firmware/efi | |
| parent | 96a3dd3dece8134ba19b0ded7e6663136d3107b9 (diff) | |
efi: Add support for EFI_RT_PROPERTIES table
Take the newly introduced EFI_RT_PROPERTIES_TABLE configuration table
into account, which carries a mask of which EFI runtime services are
still functional after ExitBootServices() has been called by the OS.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Diffstat (limited to 'drivers/firmware/efi')
| -rw-r--r-- | drivers/firmware/efi/efi.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c index 703a019d81b4..a35230517f9c 100644 --- a/drivers/firmware/efi/efi.c +++ b/drivers/firmware/efi/efi.c @@ -47,6 +47,7 @@ EXPORT_SYMBOL(efi); static unsigned long __ro_after_init rng_seed = EFI_INVALID_TABLE_ADDR; static unsigned long __initdata mem_reserve = EFI_INVALID_TABLE_ADDR; +static unsigned long __initdata rt_prop = EFI_INVALID_TABLE_ADDR; struct mm_struct efi_mm = { .mm_rb = RB_ROOT, @@ -449,6 +450,7 @@ static const efi_config_table_type_t common_tables[] __initconst = { {LINUX_EFI_TPM_EVENT_LOG_GUID, "TPMEventLog", &efi.tpm_log}, {LINUX_EFI_TPM_FINAL_LOG_GUID, "TPMFinalLog", &efi.tpm_final_log}, {LINUX_EFI_MEMRESERVE_TABLE_GUID, "MEMRESERVE", &mem_reserve}, + {EFI_RT_PROPERTIES_TABLE_GUID, "RTPROP", &rt_prop}, #ifdef CONFIG_EFI_RCI2_TABLE {DELLEMC_EFI_RCI2_TABLE_GUID, NULL, &rci2_table_phys}, #endif @@ -575,6 +577,16 @@ int __init efi_config_parse_tables(const efi_config_table_t *config_tables, } } + if (rt_prop != EFI_INVALID_TABLE_ADDR) { + efi_rt_properties_table_t *tbl; + + tbl = early_memremap(rt_prop, sizeof(*tbl)); + if (tbl) { + efi.runtime_supported_mask &= tbl->runtime_services_supported; + early_memunmap(tbl, sizeof(*tbl)); + } + } + return 0; } |