[Xen-changelog] [xen master] x86: don't setup legacy syscall vector when !CONFIG_PV

[patchbot@xxxxxxx]

commit 3528426cb93948e440da947963bd8163f186ef67
Author:     Wei Liu <wei.liu2@xxxxxxxxxx>
AuthorDate: Fri Oct 19 15:28:36 2018 +0100
Commit:     Wei Liu <wei.liu2@xxxxxxxxxx>
CommitDate: Mon Oct 22 12:31:09 2018 +0100

    x86: don't setup legacy syscall vector when !CONFIG_PV
    
    The code snippet is to switch between SYS_DECS_trap_gate and
    SYS_DESC_irq_gate depending on whether XPTI is used. When PV is
    disabled there is no need to switch.
    
    Signed-off-by: Wei Liu <wei.liu2@xxxxxxxxxx>
    Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
 xen/arch/x86/smpboot.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/xen/arch/x86/smpboot.c b/xen/arch/x86/smpboot.c
index 35abfc4ea4..43deb82e53 100644
--- a/xen/arch/x86/smpboot.c
+++ b/xen/arch/x86/smpboot.c
@@ -1094,12 +1094,14 @@ void __init smp_prepare_cpus(void)
     {
         get_cpu_info()->pv_cr3 = 0;
 
+#ifdef CONFIG_PV
         /*
          * All entry points which may need to switch page tables have to start
          * with interrupts off. Re-write what pv_trap_init() has put there.
          */
         _set_gate(idt_table + LEGACY_SYSCALL_VECTOR, SYS_DESC_irq_gate, 3,
                   &int80_direct_trap);
+#endif
     }
 
     set_nr_sockets();
--
generated by git-patchbot for /home/xen/git/xen.git#master

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