Commit f6a148fe authored by Richard Henderson's avatar Richard Henderson Committed by Peter Maydell
Browse files

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: default avatarPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: default avatarRichard Henderson <richard.henderson@linaro.org>
Message-id: 20190204132126.3255-5-richard.henderson@linaro.org
Signed-off-by: default avatarPeter Maydell <peter.maydell@linaro.org>
parent c47eaf9f

target/arm/cpu.c

+6 −0
Original line number Diff line number Diff line
@@ -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)) {