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| author | Amit Daniel Kachhap <amit.kachhap@arm.com> | 2020-03-13 12:05:01 +0300 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2020-03-18 12:50:21 +0300 |
| commit | e51f5f56dd69e009e22af8a4354dce0817a7addb (patch) | |
| tree | 182804e98137612faba8658ff92a128e37ac5c2b /arch/arm64/kernel | |
| parent | cdcb61ae4c56f9edcd1eca4c2df444f3f5e96e1d (diff) | |
| download | linux-e51f5f56dd69e009e22af8a4354dce0817a7addb.tar.xz | |
arm64: suspend: restore the kernel ptrauth keys
This patch restores the kernel keys from current task during cpu resume
after the mmu is turned on and ptrauth is enabled.
A flag is added in macro ptrauth_keys_install_kernel to check if isb
instruction needs to be executed.
Signed-off-by: Amit Daniel Kachhap <amit.kachhap@arm.com>
Reviewed-by: Vincenzo Frascino <Vincenzo.Frascino@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/kernel')
| -rw-r--r-- | arch/arm64/kernel/entry.S | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S index 3dad2d000e3c..6273d7bed962 100644 --- a/arch/arm64/kernel/entry.S +++ b/arch/arm64/kernel/entry.S @@ -178,7 +178,7 @@ alternative_cb_end apply_ssbd 1, x22, x23 - ptrauth_keys_install_kernel tsk, x20, x22, x23 + ptrauth_keys_install_kernel tsk, 1, x20, x22, x23 .else add x21, sp, #S_FRAME_SIZE get_current_task tsk @@ -900,7 +900,7 @@ ENTRY(cpu_switch_to) ldr lr, [x8] mov sp, x9 msr sp_el0, x1 - ptrauth_keys_install_kernel x1, x8, x9, x10 + ptrauth_keys_install_kernel x1, 1, x8, x9, x10 ret ENDPROC(cpu_switch_to) NOKPROBE(cpu_switch_to) |