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[PATCH v6 30/31] target/arm: Enable MTE for user-only
From: |
Richard Henderson |
Subject: |
[PATCH v6 30/31] target/arm: Enable MTE for user-only |
Date: |
Tue, 9 Feb 2021 16:02:22 -0800 |
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/cpu.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/target/arm/cpu.c b/target/arm/cpu.c
index 761f0c61bd..929de1071b 100644
--- a/target/arm/cpu.c
+++ b/target/arm/cpu.c
@@ -209,6 +209,21 @@ static void arm_cpu_reset(DeviceState *dev)
* Note that this must match useronly_clean_ptr.
*/
env->cp15.tcr_el[1].raw_tcr = (1ULL << 37);
+
+ /* Enable MTE */
+ if (cpu_isar_feature(aa64_mte, cpu)) {
+ /* Enable tag access, but leave TCF0 as No Effect (0). */
+ env->cp15.sctlr_el[1] |= SCTLR_ATA0;
+ /*
+ * Exclude all tags, so that tag 0 is always used.
+ * This corresponds to Linux current->thread.gcr_incl = 0.
+ *
+ * Set RRND, so that helper_irg() will generate a seed later.
+ * Here in cpu_reset(), the crypto subsystem has not yet been
+ * initialized.
+ */
+ env->cp15.gcr_el1 = 0x1ffff;
+ }
#else
/* Reset into the highest available EL */
if (arm_feature(env, ARM_FEATURE_EL3)) {
--
2.25.1
- [PATCH v6 14/31] linux-user: Use guest_range_valid in access_ok, (continued)
- [PATCH v6 14/31] linux-user: Use guest_range_valid in access_ok, Richard Henderson, 2021/02/09
- [PATCH v6 09/31] linux-user: Do not use guest_addr_valid for h2g_valid, Richard Henderson, 2021/02/09
- [PATCH v6 12/31] exec: Use cpu_untagged_addr in g2h; split out g2h_untagged, Richard Henderson, 2021/02/09
- [PATCH v6 10/31] linux-user: Fix guest_addr_valid vs reserved_va, Richard Henderson, 2021/02/09
- [PATCH v6 11/31] exec: Introduce cpu_untagged_addr, Richard Henderson, 2021/02/09
- [PATCH v6 16/31] linux-user: Use cpu_untagged_addr in access_ok; split out *_untagged, Richard Henderson, 2021/02/09
- [PATCH v6 18/31] linux-user: Fix types in uaccess.c, Richard Henderson, 2021/02/09
- [PATCH v6 15/31] exec: Rename guest_{addr,range}_valid to *_untagged, Richard Henderson, 2021/02/09
- [PATCH v6 17/31] linux-user: Move lock_user et al out of line, Richard Henderson, 2021/02/09
- [PATCH v6 20/31] linux-user/aarch64: Implement PR_TAGGED_ADDR_ENABLE, Richard Henderson, 2021/02/09
- [PATCH v6 30/31] target/arm: Enable MTE for user-only,
Richard Henderson <=
- [PATCH v6 27/31] linux-user/aarch64: Signal SEGV_MTESERR for sync tag check fault, Richard Henderson, 2021/02/09
- [PATCH v6 29/31] target/arm: Add allocation tag storage for user mode, Richard Henderson, 2021/02/09
- [PATCH v6 31/31] tests/tcg/aarch64: Add mte smoke tests, Richard Henderson, 2021/02/09
- [PATCH v6 23/31] linux-user/aarch64: Implement PR_MTE_TCF and PR_MTE_TAG, Richard Henderson, 2021/02/09
- [PATCH v6 19/31] linux-user: Handle tags in lock_user/unlock_user, Richard Henderson, 2021/02/09
- [PATCH v6 22/31] target/arm: Use the proper TBI settings for linux-user, Richard Henderson, 2021/02/09
- [PATCH v6 24/31] linux-user/aarch64: Implement PROT_MTE, Richard Henderson, 2021/02/09
- [PATCH v6 21/31] target/arm: Improve gen_top_byte_ignore, Richard Henderson, 2021/02/09
- [PATCH v6 26/31] linux-user/aarch64: Pass syndrome to EXC_*_ABORT, Richard Henderson, 2021/02/09