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@infradead.org>
Reviewed-by: Juergen Gross <jgross@suse.com>
Link: https://lore.kernel.org/r/20210624095148.810950584@infradead.org

diff --git a/arch/x86/xen/xen-head.S b/arch/x86/xen/xen-head.S
index 488944d6d430ee3cd46c14b6e7dd3868abbd8965..9e27b86a0c31b26a595fe9fadaabb87531c42e6a 100644 (file)
--- 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)