From: Sergey Fedorov <s.fedo...@samsung.com>
This patch is based on idea found in patch at
git://github.com/jowinter/qemu-trustzone.git
f3d955c6c0ed8c46bc0eb10b634201032a651dd2 by
Johannes Winter <johannes.win...@iaik.tugraz.at>.
The TBFLAG captures the SCR NS secure state at the time when a TB is created so
the correct bank is accessed on system register accesses. It also allows to
generate different TCG code depending on CPU secure state.
Signed-off-by: Sergey Fedorov <s.fedo...@samsung.com>
Signed-off-by: Fabian Aggeler <aggel...@ethz.ch>
Signed-off-by: Greg Bellows <greg.bell...@linaro.org>
==========
v5 -> v6
- Removed 64-bit NS TBFLAG macros as they are not needed
- Added comment on DisasContext ns field
- Replaced use of USE_SECURE_REG with use_secure_reg
v4 -> v5
- Merge changes
- Fixed issue where TB secure state flag was incorrectly being set based on
secure state rather than NS setting. This caused an issue where monitor mode
MRC/MCR accesses were always secure rather than being based on NS bit
setting.
- Added separate 64/32 TB secure state flags
- Unconditionalized the setting of the DC ns bit
- Removed IS_NS macro and replaced with direct usage.
Signed-off-by: Greg Bellows <greg.bell...@linaro.org>
---
target-arm/cpu.h | 7 +++++++
target-arm/translate.c | 1 +
target-arm/translate.h | 1 +
3 files changed, 9 insertions(+)
diff --git a/target-arm/cpu.h b/target-arm/cpu.h
index b48b81a..e041437 100644
--- a/target-arm/cpu.h
+++ b/target-arm/cpu.h
@@ -1551,6 +1551,8 @@ static inline bool arm_singlestep_active(CPUARMState *env)
*/
#define ARM_TBFLAG_XSCALE_CPAR_SHIFT 20
#define ARM_TBFLAG_XSCALE_CPAR_MASK (3 << ARM_TBFLAG_XSCALE_CPAR_SHIFT)
+#define ARM_TBFLAG_NS_SHIFT 22
+#define ARM_TBFLAG_NS_MASK (1 << ARM_TBFLAG_NS_SHIFT)
/* Bit usage when in AArch64 state */
#define ARM_TBFLAG_AA64_EL_SHIFT 0
@@ -1595,6 +1597,8 @@ static inline bool arm_singlestep_active(CPUARMState *env)
(((F) & ARM_TBFLAG_AA64_SS_ACTIVE_MASK) >> ARM_TBFLAG_AA64_SS_ACTIVE_SHIFT)
#define ARM_TBFLAG_AA64_PSTATE_SS(F) \
(((F) & ARM_TBFLAG_AA64_PSTATE_SS_MASK) >> ARM_TBFLAG_AA64_PSTATE_SS_SHIFT)
+#define ARM_TBFLAG_NS(F) \
+ (((F) & ARM_TBFLAG_NS_MASK) >> ARM_TBFLAG_NS_SHIFT)
static inline void cpu_get_tb_cpu_state(CPUARMState *env, target_ulong *pc,
target_ulong *cs_base, int *flags)
@@ -1644,6 +1648,9 @@ static inline void cpu_get_tb_cpu_state(CPUARMState *env,
target_ulong *pc,
if (privmode) {
*flags |= ARM_TBFLAG_PRIV_MASK;
}
+ if (!(use_secure_reg(env))) {
+ *flags |= ARM_TBFLAG_NS_MASK;
+ }
if (env->vfp.xregs[ARM_VFP_FPEXC] & (1 << 30)
|| arm_el_is_aa64(env, 1)) {
*flags |= ARM_TBFLAG_VFPEN_MASK;
diff --git a/target-arm/translate.c b/target-arm/translate.c
index 91958b6..aa17a20 100644
--- a/target-arm/translate.c
+++ b/target-arm/translate.c
@@ -11002,6 +11002,7 @@ static inline void
gen_intermediate_code_internal(ARMCPU *cpu,
#if !defined(CONFIG_USER_ONLY)
dc->user = (ARM_TBFLAG_PRIV(tb->flags) == 0);
#endif
+ dc->ns = ARM_TBFLAG_NS(tb->flags);
dc->cpacr_fpen = ARM_TBFLAG_CPACR_FPEN(tb->flags);
dc->vfp_enabled = ARM_TBFLAG_VFPEN(tb->flags);
dc->vec_len = ARM_TBFLAG_VECLEN(tb->flags);
diff --git a/target-arm/translate.h b/target-arm/translate.h
index 41a9071..f6ee789 100644
--- a/target-arm/translate.h
+++ b/target-arm/translate.h
@@ -20,6 +20,7 @@ typedef struct DisasContext {
#if !defined(CONFIG_USER_ONLY)
int user;
#endif
+ bool ns; /* Use non-secure CPREG bank on access */
bool cpacr_fpen; /* FP enabled via CPACR.FPEN */
bool vfp_enabled; /* FP enabled via FPSCR.EN */
int vec_len;
--
1.8.3.2
