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 | |
| parent | 96a3dd3dece8134ba19b0ded7e6663136d3107b9 (diff) | |
| download | linux-fe4db90a80cd12ebe4efe385d40d6636330149ed.tar.bz2 | |
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>
| -rw-r--r-- | drivers/firmware/efi/efi.c | 12 | ||||
| -rw-r--r-- | include/linux/efi.h | 9 |
2 files changed, 21 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; } diff --git a/include/linux/efi.h b/include/linux/efi.h index 57695f400044..2ab33d5d6ca5 100644 --- a/include/linux/efi.h +++ b/include/linux/efi.h @@ -334,6 +334,7 @@ void efi_native_runtime_setup(void); #define EFI_TCG2_PROTOCOL_GUID EFI_GUID(0x607f766c, 0x7455, 0x42be, 0x93, 0x0b, 0xe4, 0xd7, 0x6d, 0xb2, 0x72, 0x0f) #define EFI_LOAD_FILE_PROTOCOL_GUID EFI_GUID(0x56ec3091, 0x954c, 0x11d2, 0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b) #define EFI_LOAD_FILE2_PROTOCOL_GUID EFI_GUID(0x4006c0c1, 0xfcb3, 0x403e, 0x99, 0x6d, 0x4a, 0x6c, 0x87, 0x24, 0xe0, 0x6d) +#define EFI_RT_PROPERTIES_TABLE_GUID EFI_GUID(0xeb66918a, 0x7eef, 0x402a, 0x84, 0x2e, 0x93, 0x1d, 0x21, 0xc3, 0x8a, 0xe9) #define EFI_IMAGE_SECURITY_DATABASE_GUID EFI_GUID(0xd719b2cb, 0x3d3a, 0x4596, 0xa3, 0xbc, 0xda, 0xd0, 0x0e, 0x67, 0x65, 0x6f) #define EFI_SHIM_LOCK_GUID EFI_GUID(0x605dab50, 0xe046, 0x4300, 0xab, 0xb6, 0x3d, 0xd8, 0x10, 0xdd, 0x8b, 0x23) @@ -486,6 +487,14 @@ typedef struct { #define EFI_PROPERTIES_TABLE_VERSION 0x00010000 #define EFI_PROPERTIES_RUNTIME_MEMORY_PROTECTION_NON_EXECUTABLE_PE_DATA 0x1 +typedef struct { + u16 version; + u16 length; + u32 runtime_services_supported; +} efi_rt_properties_table_t; + +#define EFI_RT_PROPERTIES_TABLE_VERSION 0x1 + #define EFI_INVALID_TABLE_ADDR (~0UL) typedef struct { |