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authorJuergen Gross <jgross@suse.com>2017-08-16 19:31:56 +0200
committerIngo Molnar <mingo@kernel.org>2017-08-24 09:57:24 +0200
commitedcb5cf84f05e5d2e2af25422a72ccde359fcca9 (patch)
tree72a27a541e13ae9bae45ecd37802a7f0fd7c6384 /arch/x86/xen/xen-asm_64.S
parentee97638b5737cc0dba2f12a3bdcda761656b7c01 (diff)
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x86/paravirt/xen: Remove xen_patch()
Xen's paravirt patch function xen_patch() does some special casing for irq_ops functions to apply relocations when those functions can be patched inline instead of calls. Unfortunately none of the special case function replacements is small enough to be patched inline, so the special case never applies. As xen_patch() will call paravirt_patch_default() in all cases it can be just dropped. xen-asm.h doesn't seem necessary without xen_patch() as the only thing left in it would be the definition of XEN_EFLAGS_NMI used only once. So move that definition and remove xen-asm.h. Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: boris.ostrovsky@oracle.com Cc: lguest@lists.ozlabs.org Cc: rusty@rustcorp.com.au Cc: xen-devel@lists.xenproject.org Link: http://lkml.kernel.org/r/20170816173157.8633-2-jgross@suse.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/xen/xen-asm_64.S')
-rw-r--r--arch/x86/xen/xen-asm_64.S20
1 files changed, 5 insertions, 15 deletions
diff --git a/arch/x86/xen/xen-asm_64.S b/arch/x86/xen/xen-asm_64.S
index c5fee26..3a3b6a2 100644
--- a/arch/x86/xen/xen-asm_64.S
+++ b/arch/x86/xen/xen-asm_64.S
@@ -1,14 +1,8 @@
/*
- * Asm versions of Xen pv-ops, suitable for either direct use or
- * inlining. The inline versions are the same as the direct-use
- * versions, with the pre- and post-amble chopped off.
- *
- * This code is encoded for size rather than absolute efficiency, with
- * a view to being able to inline as much as possible.
+ * Asm versions of Xen pv-ops, suitable for direct use.
*
* We only bother with direct forms (ie, vcpu in pda) of the
- * operations here; the indirect forms are better handled in C, since
- * they're generally too large to inline anyway.
+ * operations here; the indirect forms are better handled in C.
*/
#include <asm/errno.h>
@@ -20,7 +14,7 @@
#include <xen/interface/xen.h>
-#include "xen-asm.h"
+#include <linux/linkage.h>
ENTRY(xen_adjust_exception_frame)
mov 8+0(%rsp), %rcx
@@ -46,9 +40,7 @@ hypercall_iret = hypercall_page + __HYPERVISOR_iret * 32
*/
ENTRY(xen_iret)
pushq $0
-1: jmp hypercall_iret
-ENDPATCH(xen_iret)
-RELOC(xen_iret, 1b+1)
+ jmp hypercall_iret
ENTRY(xen_sysret64)
/*
@@ -65,9 +57,7 @@ ENTRY(xen_sysret64)
pushq %rcx
pushq $VGCF_in_syscall
-1: jmp hypercall_iret
-ENDPATCH(xen_sysret64)
-RELOC(xen_sysret64, 1b+1)
+ jmp hypercall_iret
/*
* Xen handles syscall callbacks much like ordinary exceptions, which
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