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authorJuergen Gross <jgross@suse.com>2017-08-31 20:42:49 +0300
committerThomas Gleixner <tglx@linutronix.de>2017-08-31 22:35:10 +0300
commit5878d5d6fdef6447d73b0acc121ba445bef37f53 (patch)
treeb4d36a16451274496a02a43adef75a68b84fdf6f /arch/x86/include/asm/proto.h
parentef1d4deab953ecb1dfcf9f167043bda8b3f14a11 (diff)
downloadlinux-5878d5d6fdef6447d73b0acc121ba445bef37f53.tar.xz
x86/xen: Get rid of paravirt op adjust_exception_frame
When running as Xen pv-guest the exception frame on the stack contains %r11 and %rcx additional to the other data pushed by the processor. Instead of having a paravirt op being called for each exception type prepend the Xen specific code to each exception entry. When running as Xen pv-guest just use the exception entry with prepended instructions, otherwise use the entry without the Xen specific code. [ tglx: Merged through tip to avoid ugly merge conflict ] Signed-off-by: Juergen Gross <jgross@suse.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: xen-devel@lists.xenproject.org Cc: boris.ostrovsky@oracle.com Cc: luto@amacapital.net Link: http://lkml.kernel.org/r/20170831174249.26853-1-jg@pfupf.net
Diffstat (limited to 'arch/x86/include/asm/proto.h')
-rw-r--r--arch/x86/include/asm/proto.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/include/asm/proto.h b/arch/x86/include/asm/proto.h
index 8d3964fc5f91..b408b1886195 100644
--- a/arch/x86/include/asm/proto.h
+++ b/arch/x86/include/asm/proto.h
@@ -24,6 +24,9 @@ void entry_SYSENTER_compat(void);
void __end_entry_SYSENTER_compat(void);
void entry_SYSCALL_compat(void);
void entry_INT80_compat(void);
+#if defined(CONFIG_X86_64) && defined(CONFIG_XEN_PV)
+void xen_entry_INT80_compat(void);
+#endif
#endif
void x86_configure_nx(void);