accel/tcg: Store some tlb flags in CPUTLBEntryFull

We have run out of bits we can use within the CPUTLBEntry comparators,
as TLB_FLAGS_MASK cannot overlap alignment.

Store slow_flags[] in CPUTLBEntryFull, and merge with the flags from
the comparator.  A new TLB_FORCE_SLOW bit is set within the comparator
as an indication that the slow path must be used.

Move TLB_BSWAP to TLB_SLOW_FLAGS_MASK.  Since we are out of bits,
we cannot create a new bit without moving an old one.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/include/exec/cpu-defs.h b/include/exec/cpu-defs.h
index e6a0794..fb4c8d4 100644
--- a/include/exec/cpu-defs.h
+++ b/include/exec/cpu-defs.h
@@ -125,6 +125,12 @@ typedef struct CPUTLBEntryFull {
     uint8_t lg_page_size;
 
     /*
+     * Additional tlb flags for use by the slow path. If non-zero,
+     * the corresponding CPUTLBEntry comparator must have TLB_FORCE_SLOW.
+     */
+    uint8_t slow_flags[MMU_ACCESS_COUNT];
+
+    /*
      * Allow target-specific additions to this structure.
      * This may be used to cache items from the guest cpu
      * page tables for later use by the implementation.