linux-kernel - [RFC v5 52/57] arm64: kernel: Annotate non-standard stack frame functions

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Date:   Thu,  9 Jan 2020 16:02:55 +0000
From:   Julien Thierry <jthierry@...hat.com>
To:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Cc:     jpoimboe@...hat.com, peterz@...radead.org, raphael.gault@....com,
        catalin.marinas@....com, will@...nel.org,
        Julien Thierry <jthierry@...hat.com>,
        Marc Zyngier <maz@...nel.org>,
        James Morse <james.morse@....com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        kvmarm@...ts.cs.columbia.edu
Subject: [RFC v5 52/57] arm64: kernel: Annotate non-standard stack frame functions

From: Raphael Gault <raphael.gault@....com>

Annotate assembler functions which are callable but do not
setup a correct stack frame.

Signed-off-by: Raphael Gault <raphael.gault@....com>
Signed-off-by: Julien Thierry <jthierry@...hat.com>
Cc: Marc Zyngier <maz@...nel.org>
Cc: James Morse <james.morse@....com>
Cc: Suzuki K Poulose <suzuki.poulose@....com>
Cc: kvmarm@...ts.cs.columbia.edu
---
 arch/arm64/kernel/hyp-stub.S | 3 +++
 arch/arm64/kvm/hyp-init.S    | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/arch/arm64/kernel/hyp-stub.S b/arch/arm64/kernel/hyp-stub.S
index 73d46070b315..8917d42f38c7 100644
--- a/arch/arm64/kernel/hyp-stub.S
+++ b/arch/arm64/kernel/hyp-stub.S
@@ -6,6 +6,7 @@
  * Author:	Marc Zyngier <marc.zyngier@....com>
  */

+#include <linux/frame.h>
 #include <linux/init.h>
 #include <linux/linkage.h>
 #include <linux/irqchip/arm-gic-v3.h>
@@ -42,6 +43,7 @@ ENTRY(__hyp_stub_vectors)
 	ventry	el1_fiq_invalid			// FIQ 32-bit EL1
 	ventry	el1_error_invalid		// Error 32-bit EL1
 ENDPROC(__hyp_stub_vectors)
+asm_stack_frame_non_standard __hyp_stub_vectors

 	.align 11

@@ -69,6 +71,7 @@ el1_sync:
 9:	mov	x0, xzr
 	eret
 ENDPROC(el1_sync)
+asm_stack_frame_non_standard el1_sync

 .macro invalid_vector	label
 \label:
diff --git a/arch/arm64/kvm/hyp-init.S b/arch/arm64/kvm/hyp-init.S
index 160be2b4696d..63deea39313d 100644
--- a/arch/arm64/kvm/hyp-init.S
+++ b/arch/arm64/kvm/hyp-init.S
@@ -12,6 +12,7 @@
 #include <asm/pgtable-hwdef.h>
 #include <asm/sysreg.h>
 #include <asm/virt.h>
+#include <linux/frame.h>

 	.text
 	.pushsection	.hyp.idmap.text, "ax"
@@ -118,6 +119,7 @@ CPU_BE(	orr	x4, x4, #SCTLR_ELx_EE)
 	/* Hello, World! */
 	eret
 ENDPROC(__kvm_hyp_init)
+asm_stack_frame_non_standard __kvm_hyp_init

 ENTRY(__kvm_handle_stub_hvc)
 	cmp	x0, #HVC_SOFT_RESTART
@@ -159,6 +161,7 @@ reset:
 	eret

 ENDPROC(__kvm_handle_stub_hvc)
+asm_stack_frame_non_standard __kvm_handle_stub_hvc

 	.ltorg

--
2.21.0