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author | Alexei Fedorov <Alexei.Fedorov@arm.com> | 2019-09-13 14:11:59 +0100 |
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committer | Alexei Fedorov <Alexei.Fedorov@arm.com> | 2019-09-13 14:11:59 +0100 |
commit | ed108b56051de5da8024568a06781ce287e86c78 (patch) | |
tree | 71b3c4864bdffb66bcc8e8a8273f484a8acfd05a /include/plat/common | |
parent | 2fc6ffc451c9af16e03eff51e779c33828e9ab07 (diff) | |
download | trusted-firmware-a-ed108b56051de5da8024568a06781ce287e86c78.tar.gz |
Refactor ARMv8.3 Pointer Authentication support code
This patch provides the following features and makes modifications
listed below:
- Individual APIAKey key generation for each CPU.
- New key generation on every BL31 warm boot and TSP CPU On event.
- Per-CPU storage of APIAKey added in percpu_data[]
of cpu_data structure.
- `plat_init_apiakey()` function replaced with `plat_init_apkey()`
which returns 128-bit value and uses Generic timer physical counter
value to increase the randomness of the generated key.
The new function can be used for generation of all ARMv8.3-PAuth keys
- ARMv8.3-PAuth specific code placed in `lib\extensions\pauth`.
- New `pauth_init_enable_el1()` and `pauth_init_enable_el3()` functions
generate, program and enable APIAKey_EL1 for EL1 and EL3 respectively;
pauth_disable_el1()` and `pauth_disable_el3()` functions disable
PAuth for EL1 and EL3 respectively;
`pauth_load_bl31_apiakey()` loads saved per-CPU APIAKey_EL1 from
cpu-data structure.
- Combined `save_gp_pauth_registers()` function replaces calls to
`save_gp_registers()` and `pauth_context_save()`;
`restore_gp_pauth_registers()` replaces `pauth_context_restore()`
and `restore_gp_registers()` calls.
- `restore_gp_registers_eret()` function removed with corresponding
code placed in `el3_exit()`.
- Fixed the issue when `pauth_t pauth_ctx` structure allocated space
for 12 uint64_t PAuth registers instead of 10 by removal of macro
CTX_PACGAKEY_END from `include/lib/el3_runtime/aarch64/context.h`
and assigning its value to CTX_PAUTH_REGS_END.
- Use of MODE_SP_ELX and MODE_SP_EL0 macro definitions
in `msr spsel` instruction instead of hard-coded values.
- Changes in documentation related to ARMv8.3-PAuth and ARMv8.5-BTI.
Change-Id: Id18b81cc46f52a783a7e6a09b9f149b6ce803211
Signed-off-by: Alexei Fedorov <Alexei.Fedorov@arm.com>
Diffstat (limited to 'include/plat/common')
-rw-r--r-- | include/plat/common/platform.h | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/include/plat/common/platform.h b/include/plat/common/platform.h index 3f9ab1b662..eeae62141c 100644 --- a/include/plat/common/platform.h +++ b/include/plat/common/platform.h @@ -104,7 +104,6 @@ void plat_panic_handler(void) __dead2; const char *plat_log_get_prefix(unsigned int log_level); void bl2_plat_preload_setup(void); int plat_try_next_boot_source(void); -uint64_t *plat_init_apiakey(void); /******************************************************************************* * Mandatory BL1 functions |