[PULL 31/37] target/arm: Replicate TBI/TBID bits for single range regimes

[Peter Maydell]

From: Richard Henderson <richard.hender...@linaro.org>

Replicate the single TBI bit from TCR_EL2 and TCR_EL3 so that
we can unconditionally use pointer bit 55 to index into our
composite TBI1:TBI0 field.

Reviewed-by: Peter Maydell <peter.mayd...@linaro.org>
Signed-off-by: Richard Henderson <richard.hender...@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <phi...@redhat.com>
Message-id: 20200302175829.2183-2-richard.hender...@linaro.org
Signed-off-by: Peter Maydell <peter.mayd...@linaro.org>
---
 target/arm/helper.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/target/arm/helper.c b/target/arm/helper.c
index 6abf52db660..f7ba34bbf6d 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -10458,7 +10458,8 @@ static int aa64_va_parameter_tbi(uint64_t tcr, 
ARMMMUIdx mmu_idx)
     } else if (mmu_idx == ARMMMUIdx_Stage2) {
         return 0; /* VTCR_EL2 */
     } else {
-        return extract32(tcr, 20, 1);
+        /* Replicate the single TBI bit so we always have 2 bits.  */
+        return extract32(tcr, 20, 1) * 3;
     }
 }
 
@@ -10469,7 +10470,8 @@ static int aa64_va_parameter_tbid(uint64_t tcr, 
ARMMMUIdx mmu_idx)
     } else if (mmu_idx == ARMMMUIdx_Stage2) {
         return 0; /* VTCR_EL2 */
     } else {
-        return extract32(tcr, 29, 1);
+        /* Replicate the single TBID bit so we always have 2 bits.  */
+        return extract32(tcr, 29, 1) * 3;
     }
 }
 
-- 
2.20.1