Re: [Qemu-devel] [PATCH for-4.2 18/24] target/arm: Update arm_sctlr for VHE

["Alex Bennée" <alex.bennee@linaro.org>]

Richard Henderson <richard.henderson@linaro.org> writes:

> Use this function in many more places in order to select
> the correct control.
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>

> ---
>  target/arm/cpu.h          | 10 ++++++----
>  target/arm/arch_dump.c    |  2 +-
>  target/arm/helper-a64.c   |  2 +-
>  target/arm/helper.c       | 10 +++++-----
>  target/arm/pauth_helper.c |  9 +--------
>  5 files changed, 14 insertions(+), 19 deletions(-)
>
> diff --git a/target/arm/cpu.h b/target/arm/cpu.h
> index 7310adfd9b..7efbb488d9 100644
> --- a/target/arm/cpu.h
> +++ b/target/arm/cpu.h
> @@ -3104,11 +3104,13 @@ static inline bool arm_sctlr_b(CPUARMState *env)
>  static inline uint64_t arm_sctlr(CPUARMState *env, int el)
>  {
>      if (el == 0) {
> -        /* FIXME: ARMv8.1-VHE S2 translation regime.  */
> -        return env->cp15.sctlr_el[1];
> -    } else {
> -        return env->cp15.sctlr_el[el];
> +        if (arm_el_is_aa64(env, 2) && (arm_hcr_el2_eff(env) & HCR_E2H)) {
> +            el = 2;
> +        } else {
> +            el = 1;
> +        }
>      }
> +    return env->cp15.sctlr_el[el];
>  }
>
>
> diff --git a/target/arm/arch_dump.c b/target/arm/arch_dump.c
> index 26a2c09868..5fbd008d8c 100644
> --- a/target/arm/arch_dump.c
> +++ b/target/arm/arch_dump.c
> @@ -320,7 +320,7 @@ int cpu_get_dump_info(ArchDumpInfo *info,
>       * dump a hypervisor that happens to be running an opposite-endian
>       * kernel.
>       */
> -    info->d_endian = (env->cp15.sctlr_el[1] & SCTLR_EE) != 0
> +    info->d_endian = (arm_sctlr(env, 1) & SCTLR_EE) != 0
>                       ? ELFDATA2MSB : ELFDATA2LSB;
>
>      return 0;
> diff --git a/target/arm/helper-a64.c b/target/arm/helper-a64.c
> index 060699b901..3bf1b731e7 100644
> --- a/target/arm/helper-a64.c
> +++ b/target/arm/helper-a64.c
> @@ -70,7 +70,7 @@ static void daif_check(CPUARMState *env, uint32_t op,
>                         uint32_t imm, uintptr_t ra)
>  {
>      /* DAIF update to PSTATE. This is OK from EL0 only if UMA is set.  */
> -    if (arm_current_el(env) == 0 && !(env->cp15.sctlr_el[1] & SCTLR_UMA)) {
> +    if (arm_current_el(env) == 0 && !(arm_sctlr(env, 0) & SCTLR_UMA)) {
>          raise_exception_ra(env, EXCP_UDEF,
>                             syn_aa64_sysregtrap(0, extract32(op, 0, 3),
>                                                 extract32(op, 3, 3), 4,
> diff --git a/target/arm/helper.c b/target/arm/helper.c
> index 54c328b844..db13a8f9c0 100644
> --- a/target/arm/helper.c
> +++ b/target/arm/helper.c
> @@ -3868,7 +3868,7 @@ static void aa64_fpsr_write(CPUARMState *env, const ARMCPRegInfo *ri,
>  static CPAccessResult aa64_daif_access(CPUARMState *env, const ARMCPRegInfo *ri,
>                                         bool isread)
>  {
> -    if (arm_current_el(env) == 0 && !(env->cp15.sctlr_el[1] & SCTLR_UMA)) {
> +    if (arm_current_el(env) == 0 && !(arm_sctlr(env, 0) & SCTLR_UMA)) {
>          return CP_ACCESS_TRAP;
>      }
>      return CP_ACCESS_OK;
> @@ -3887,7 +3887,7 @@ static CPAccessResult aa64_cacheop_access(CPUARMState *env,
>      /* Cache invalidate/clean: NOP, but EL0 must UNDEF unless
>       * SCTLR_EL1.UCI is set.
>       */
> -    if (arm_current_el(env) == 0 && !(env->cp15.sctlr_el[1] & SCTLR_UCI)) {
> +    if (arm_current_el(env) == 0 && !(arm_sctlr(env, 0) & SCTLR_UCI)) {
>          return CP_ACCESS_TRAP;
>      }
>      return CP_ACCESS_OK;
> @@ -4114,7 +4114,7 @@ static CPAccessResult aa64_zva_access(CPUARMState *env, const ARMCPRegInfo *ri,
>      /* We don't implement EL2, so the only control on DC ZVA is the
>       * bit in the SCTLR which can prohibit access for EL0.
>       */
> -    if (arm_current_el(env) == 0 && !(env->cp15.sctlr_el[1] & SCTLR_DZE)) {
> +    if (arm_current_el(env) == 0 && !(arm_sctlr(env, 0) & SCTLR_DZE)) {
>          return CP_ACCESS_TRAP;
>      }
>      return CP_ACCESS_OK;
> @@ -5344,7 +5344,7 @@ static CPAccessResult ctr_el0_access(CPUARMState *env, const ARMCPRegInfo *ri,
>      /* Only accessible in EL0 if SCTLR.UCT is set (and only in AArch64,
>       * but the AArch32 CTR has its own reginfo struct)
>       */
> -    if (arm_current_el(env) == 0 && !(env->cp15.sctlr_el[1] & SCTLR_UCT)) {
> +    if (arm_current_el(env) == 0 && !(arm_sctlr(env, 0) & SCTLR_UCT)) {
>          return CP_ACCESS_TRAP;
>      }
>      return CP_ACCESS_OK;
> @@ -8161,7 +8161,7 @@ static void take_aarch32_exception(CPUARMState *env, int new_mode,
>      env->uncached_cpsr = (env->uncached_cpsr & ~CPSR_M) | new_mode;
>      /* Set new mode endianness */
>      env->uncached_cpsr &= ~CPSR_E;
> -    if (env->cp15.sctlr_el[arm_current_el(env)] & SCTLR_EE) {
> +    if (arm_sctlr(env, arm_current_el(env)) & SCTLR_EE) {
>          env->uncached_cpsr |= CPSR_E;
>      }
>      /* J and IL must always be cleared for exception entry */
> diff --git a/target/arm/pauth_helper.c b/target/arm/pauth_helper.c
> index d3194f2043..42c9141bb7 100644
> --- a/target/arm/pauth_helper.c
> +++ b/target/arm/pauth_helper.c
> @@ -386,14 +386,7 @@ static void pauth_check_trap(CPUARMState *env, int el, uintptr_t ra)
>
>  static bool pauth_key_enabled(CPUARMState *env, int el, uint32_t bit)
>  {
> -    uint32_t sctlr;
> -    if (el == 0) {
> -        /* FIXME: ARMv8.1-VHE S2 translation regime.  */
> -        sctlr = env->cp15.sctlr_el[1];
> -    } else {
> -        sctlr = env->cp15.sctlr_el[el];
> -    }
> -    return (sctlr & bit) != 0;
> +    return (arm_sctlr(env, el) & bit) != 0;
>  }
>
>  uint64_t HELPER(pacia)(CPUARMState *env, uint64_t x, uint64_t y)


--
Alex Bennée