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[Qemu-devel] [PULL 15/22] target/arm: Enable TBI for user-only
From: |
Peter Maydell |
Subject: |
[Qemu-devel] [PULL 15/22] target/arm: Enable TBI for user-only |
Date: |
Tue, 5 Feb 2019 17:05:03 +0000 |
From: Richard Henderson <address@hidden>
This has been enabled in the linux kernel since v3.11
(commit d50240a5f6cea, 2013-09-03,
"arm64: mm: permit use of tagged pointers at EL0").
Reviewed-by: Peter Maydell <address@hidden>
Signed-off-by: Richard Henderson <address@hidden>
Message-id: address@hidden
Signed-off-by: Peter Maydell <address@hidden>
---
target/arm/cpu.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/target/arm/cpu.c b/target/arm/cpu.c
index 3874dc98754..edf6e0e1f1c 100644
--- a/target/arm/cpu.c
+++ b/target/arm/cpu.c
@@ -200,6 +200,12 @@ static void arm_cpu_reset(CPUState *s)
env->vfp.zcr_el[1] = cpu->sve_max_vq - 1;
env->vfp.zcr_el[2] = env->vfp.zcr_el[1];
env->vfp.zcr_el[3] = env->vfp.zcr_el[1];
+ /*
+ * Enable TBI0 and TBI1. While the real kernel only enables TBI0,
+ * turning on both here will produce smaller code and otherwise
+ * make no difference to the user-level emulation.
+ */
+ env->cp15.tcr_el[1].raw_tcr = (3ULL << 37);
#else
/* Reset into the highest available EL */
if (arm_feature(env, ARM_FEATURE_EL3)) {
--
2.20.1
- [Qemu-devel] [PULL 00/22] target-arm queue, Peter Maydell, 2019/02/05
- [Qemu-devel] [PULL 02/22] target/arm: Add PSTATE.BTYPE, Peter Maydell, 2019/02/05
- [Qemu-devel] [PULL 10/22] linux-user: Implement PR_PAC_RESET_KEYS, Peter Maydell, 2019/02/05
- [Qemu-devel] [PULL 21/22] hw/arm/boot: Support DTB autoload for firmware-only boots, Peter Maydell, 2019/02/05
- [Qemu-devel] [PULL 01/22] target/arm: Introduce isar_feature_aa64_bti, Peter Maydell, 2019/02/05
- [Qemu-devel] [PULL 15/22] target/arm: Enable TBI for user-only,
Peter Maydell <=
- [Qemu-devel] [PULL 04/22] exec: Add target-specific tlb bits to MemTxAttrs, Peter Maydell, 2019/02/05
- [Qemu-devel] [PULL 07/22] target/arm: Reset btype for direct branches, Peter Maydell, 2019/02/05
- [Qemu-devel] [PULL 09/22] target/arm: Enable BTI for -cpu max, Peter Maydell, 2019/02/05
- [Qemu-devel] [PULL 14/22] target/arm: Compute TB_FLAGS for TBI for user-only, Peter Maydell, 2019/02/05
- [Qemu-devel] [PULL 19/22] hw/arm/boot: Factor out "set up firmware boot" code, Peter Maydell, 2019/02/05
- [Qemu-devel] [PULL 12/22] target/arm: Add TBFLAG_A64_TBID, split out gen_top_byte_ignore, Peter Maydell, 2019/02/05
- [Qemu-devel] [PULL 03/22] target/arm: Add BT and BTYPE to tb->flags, Peter Maydell, 2019/02/05
- [Qemu-devel] [PULL 06/22] target/arm: Default handling of BTYPE during translation, Peter Maydell, 2019/02/05
- [Qemu-devel] [PULL 16/22] gdbstub: allow killing QEMU via vKill command, Peter Maydell, 2019/02/05
- [Qemu-devel] [PULL 11/22] tests/tcg/aarch64: Add pauth smoke test, Peter Maydell, 2019/02/05