[Xen-changelog] [xen stable-4.8] Revert "xen/arm32: entry: Consolidate DEFINE_TRAP_ENTRY_* macros"

[patchbot@xxxxxxx]

commit 960670ae79d142e52c3a5fc7d44b2fcbabd67dd3
Author:     Julien Grall <julien.grall@xxxxxxx>
AuthorDate: Thu Oct 17 14:25:05 2019 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Mon Nov 4 15:20:16 2019 +0100

    Revert "xen/arm32: entry: Consolidate DEFINE_TRAP_ENTRY_* macros"
    
    This reverts commit 6082e3ba8941b3d10c3cb73f445759c19e89afc9.
    
    The patch was meant to only consolidate the code but it also re-enables
    Abort interrupt. Follow-up patch will introduce a different way to
    consolidate the code.
    
    This is part of XSA-303.
    
    Reported-by: Julien Grall <Julien.Grall@xxxxxxx>
    Signed-off-by: Julien Grall <julien.grall@xxxxxxx>
    Acked-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
---
 xen/arch/arm/arm32/entry.S | 22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

diff --git a/xen/arch/arm/arm32/entry.S b/xen/arch/arm/arm32/entry.S
index b66705ff50..3e320dc8ac 100644
--- a/xen/arch/arm/arm32/entry.S
+++ b/xen/arch/arm/arm32/entry.S
@@ -116,15 +116,11 @@ abort_guest_exit_end:
 
         mov pc, lr
 
-/*
- * Macro to define trap entry. The iflags corresponds to the list of
- * interrupts (Asynchronous Abort, IRQ, FIQ) to unmask.
- */
-#define __DEFINE_TRAP_ENTRY(trap, iflags)                               \
+#define DEFINE_TRAP_ENTRY(trap)                                         \
         ALIGN;                                                          \
 trap_##trap:                                                            \
         SAVE_ALL;                                                       \
-        cpsie iflags;                                                   \
+        cpsie i;        /* local_irq_enable */                          \
         adr lr, return_from_trap;                                       \
         mov r0, sp;                                                     \
         /*                                                              \
@@ -135,11 +131,15 @@ trap_##trap:                                              
              \
         bic sp, #7; /* Align the stack pointer (noop on guest trap) */  \
         b do_trap_##trap
 
-/* Trap handler which unmask IRQ/Abort, keep FIQ masked */
-#define DEFINE_TRAP_ENTRY(trap) __DEFINE_TRAP_ENTRY(trap, ai)
-
-/* Trap handler which unmask Abort, keep IRQ/FIQ masked */
-#define DEFINE_TRAP_ENTRY_NOIRQ(trap) __DEFINE_TRAP_ENTRY(trap, a)
+#define DEFINE_TRAP_ENTRY_NOIRQ(trap)                                   \
+        ALIGN;                                                          \
+trap_##trap:                                                            \
+        SAVE_ALL;                                                       \
+        adr lr, return_from_trap;                                       \
+        mov r0, sp;                                                     \
+        mov r11, sp;                                                    \
+        bic sp, #7; /* Align the stack pointer (noop on guest trap) */  \
+        b do_trap_##trap
 
         .align 5
 GLOBAL(hyp_traps_vector)
--
generated by git-patchbot for /home/xen/git/xen.git#stable-4.8

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