x86/ibt,sev: Annotations

No IBT on AMD so far.. probably correct, who knows.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Link: https://lore.kernel.org/r/20220308154318.995109889@infradead.org

diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S
index d76f14f..6e53991 100644 (file)
--- a/arch/x86/entry/entry_64.S
+++ b/arch/x86/entry/entry_64.S
@@ -95,6 +95,7 @@ SYM_CODE_START(entry_SYSCALL_64)
        movq    PER_CPU_VAR(cpu_current_top_of_stack), %rsp
 
 SYM_INNER_LABEL(entry_SYSCALL_64_safe_stack, SYM_L_GLOBAL)
+       ANNOTATE_NOENDBR
 
        /* Construct struct pt_regs on stack */
        pushq   $__USER_DS                              /* pt_regs->ss */

diff --git a/arch/x86/entry/entry_64_compat.S b/arch/x86/entry/entry_64_compat.S
index 74208a1..4fdb007 100644 (file)
--- a/arch/x86/entry/entry_64_compat.S
+++ b/arch/x86/entry/entry_64_compat.S
@@ -214,6 +214,7 @@ SYM_CODE_START(entry_SYSCALL_compat)
        movq    PER_CPU_VAR(cpu_current_top_of_stack), %rsp
 
 SYM_INNER_LABEL(entry_SYSCALL_compat_safe_stack, SYM_L_GLOBAL)
+       ANNOTATE_NOENDBR
 
        /* Construct struct pt_regs on stack */
        pushq   $__USER32_DS            /* pt_regs->ss */

diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S
index 462cc1e..b8e3019 100644 (file)
--- a/arch/x86/kernel/head_64.S
+++ b/arch/x86/kernel/head_64.S
@@ -332,6 +332,7 @@ SYM_CODE_END(start_cpu0)
  */
 SYM_CODE_START_NOALIGN(vc_boot_ghcb)
        UNWIND_HINT_IRET_REGS offset=8
+       ENDBR
 
        /* Build pt_regs */
        PUSH_AND_CLEAR_REGS
@@ -439,6 +440,7 @@ SYM_CODE_END(early_idt_handler_common)
  */
 SYM_CODE_START_NOALIGN(vc_no_ghcb)
        UNWIND_HINT_IRET_REGS offset=8
+       ENDBR
 
        /* Build pt_regs */
        PUSH_AND_CLEAR_REGS