linux-kernel - [tip: objtool/core] x86/xen: Make hypercall

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Date:   Fri, 17 Sep 2021 12:58:05 -0000
From:   "tip-bot2 for Peter Zijlstra" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        Juergen Gross <jgross@...e.com>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: objtool/core] x86/xen: Make hypercall_page noinstr

The following commit has been merged into the objtool/core branch of tip:

Commit-ID:     74ea805b79d2b6eb472daa2540ed35ccb4ed23e7
Gitweb:        https://git.kernel.org/tip/74ea805b79d2b6eb472daa2540ed35ccb4ed23e7
Author:        Peter Zijlstra <peterz@...radead.org>
AuthorDate:    Thu, 24 Jun 2021 11:41:18 +02:00
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Fri, 17 Sep 2021 13:14:44 +02:00

x86/xen: Make hypercall_page noinstr

vmlinux.o: warning: objtool: xen_set_debugreg()+0x3: call to hypercall_page() leaves .noinstr.text section
vmlinux.o: warning: objtool: xen_get_debugreg()+0x3: call to hypercall_page() leaves .noinstr.text section
vmlinux.o: warning: objtool: xen_irq_enable()+0x24: call to hypercall_page() leaves .noinstr.text section

Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Reviewed-by: Juergen Gross <jgross@...e.com>
Link: https://lore.kernel.org/r/20210624095148.810950584@infradead.org
---
 arch/x86/xen/xen-head.S | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/xen/xen-head.S b/arch/x86/xen/xen-head.S
index 488944d..9e27b86 100644
--- a/arch/x86/xen/xen-head.S
+++ b/arch/x86/xen/xen-head.S
@@ -20,7 +20,7 @@
 #include <xen/interface/xen-mca.h>
 #include <asm/xen/interface.h>
 
-.pushsection .text
+.pushsection .noinstr.text, "ax"
 	.balign PAGE_SIZE
 SYM_CODE_START(hypercall_page)
 	.rept (PAGE_SIZE / 32)