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| author | Richard Henderson | 2019-02-05 17:52:40 +0100 |
|---|---|---|
| committer | Peter Maydell | 2019-02-05 17:52:40 +0100 |
| commit | f6a148fef63698826e69ca91cc11877ab1ed786f (patch) | |
| tree | caa1193efb3bfdda4c8aefae3553dfe3b52ff3ff /target | |
| parent | target/arm: Compute TB_FLAGS for TBI for user-only (diff) | |
| download | qemu-f6a148fef63698826e69ca91cc11877ab1ed786f.tar.gz qemu-f6a148fef63698826e69ca91cc11877ab1ed786f.tar.xz qemu-f6a148fef63698826e69ca91cc11877ab1ed786f.zip | |
target/arm: Enable TBI for user-only
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 <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20190204132126.3255-5-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'target')
| -rw-r--r-- | target/arm/cpu.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/target/arm/cpu.c b/target/arm/cpu.c index 3874dc9875..edf6e0e1f1 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)) { |