lkml.org 
[lkml]   [2020]   [Jan]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[RFC v5 49/57] arm64: kvm: Annotate non-standard stack frame functions
Date
From: Raphael Gault <raphael.gault@arm.com>

Both __guest_entry and __guest_exit functions do not setup
a correct stack frame. Because they can be considered as callable
functions, even if they are particular cases, we chose to silence
the warnings given by objtool by annotating them as non-standard.

Signed-off-by: Raphael Gault <raphael.gault@arm.com>
Signed-off-by: Julien Thierry <jthierry@redhat.com>
Cc: Marc Zyngier <maz@kernel.org>
Cc: James Morse <james.morse@arm.com>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: kvmarm@lists.cs.columbia.edu
---
arch/arm64/kvm/hyp/entry.S | 3 +++
1 file changed, 3 insertions(+)

diff --git a/arch/arm64/kvm/hyp/entry.S b/arch/arm64/kvm/hyp/entry.S
index e5cc8d66bf53..c3443bfd0944 100644
--- a/arch/arm64/kvm/hyp/entry.S
+++ b/arch/arm64/kvm/hyp/entry.S
@@ -15,6 +15,7 @@
#include <asm/kvm_asm.h>
#include <asm/kvm_mmu.h>
#include <asm/kvm_ptrauth.h>
+#include <linux/frame.h>

#define CPU_GP_REG_OFFSET(x) (CPU_GP_REGS + x)
#define CPU_XREG_OFFSET(x) CPU_GP_REG_OFFSET(CPU_USER_PT_REGS + 8*x)
@@ -97,6 +98,7 @@ alternative_else_nop_endif
eret
sb
ENDPROC(__guest_enter)
+asm_stack_frame_non_standard __guest_enter

ENTRY(__guest_exit)
// x0: return code
@@ -193,3 +195,4 @@ abort_guest_exit_end:
orr x0, x0, x5
1: ret
ENDPROC(__guest_exit)
+asm_stack_frame_non_standard __guest_exit
--
2.21.0
\
 
 \ /
  Last update: 2020-01-09 17:09    [W:0.331 / U:2.228 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site