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[PATCH 08/11] target/arm: Enforce PAN semantics in get_S1prot
From: |
Richard Henderson |
Subject: |
[PATCH 08/11] target/arm: Enforce PAN semantics in get_S1prot |
Date: |
Tue, 3 Dec 2019 14:53:30 -0800 |
If we have a PAN-enforcing mmu_idx, set prot == 0 if user_rw != 0.
Signed-off-by: Richard Henderson <address@hidden>
---
target/arm/internals.h | 13 +++++++++++++
target/arm/helper.c | 3 +++
2 files changed, 16 insertions(+)
diff --git a/target/arm/internals.h b/target/arm/internals.h
index 2408953031..ab3b436379 100644
--- a/target/arm/internals.h
+++ b/target/arm/internals.h
@@ -893,6 +893,19 @@ static inline bool regime_is_secure(CPUARMState *env,
ARMMMUIdx mmu_idx)
}
}
+static inline bool regime_is_pan(CPUARMState *env, ARMMMUIdx mmu_idx)
+{
+ switch (mmu_idx) {
+ case ARMMMUIdx_Stage1_E1_PAN:
+ case ARMMMUIdx_EL10_1_PAN:
+ case ARMMMUIdx_EL20_2_PAN:
+ case ARMMMUIdx_SE1_PAN:
+ return true;
+ default:
+ return false;
+ }
+}
+
/* Return the FSR value for a debug exception (watchpoint, hardware
* breakpoint or BKPT insn) targeting the specified exception level.
*/
diff --git a/target/arm/helper.c b/target/arm/helper.c
index 6c65dd799e..a1dbafb9b2 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -9444,6 +9444,9 @@ static int get_S1prot(CPUARMState *env, ARMMMUIdx
mmu_idx, bool is_aa64,
if (is_user) {
prot_rw = user_rw;
} else {
+ if (user_rw && regime_is_pan(env, mmu_idx)) {
+ return 0;
+ }
prot_rw = simple_ap_to_rw_prot_is_user(ap, false);
}
--
2.17.1
- [PATCH 06/11] target/arm: Update MSR access for PAN, (continued)
- [PATCH 06/11] target/arm: Update MSR access for PAN, Richard Henderson, 2019/12/03
- [PATCH 07/11] target/arm: Update arm_mmu_idx_el for PAN, Richard Henderson, 2019/12/03
- [PATCH 05/11] target/arm: Add isar_feature tests for PAN + ATS1E1, Richard Henderson, 2019/12/03
- [PATCH 03/11] target/arm: Add mmu_idx for EL1 and EL2 w/ PAN enabled, Richard Henderson, 2019/12/03
- [PATCH 09/11] target/arm: Set PAN bit as required on exception entry, Richard Henderson, 2019/12/03
- [PATCH 08/11] target/arm: Enforce PAN semantics in get_S1prot,
Richard Henderson <=
- [PATCH 11/11] target/arm: Enable ARMv8.2-ATS1E1 in -cpu max, Richard Henderson, 2019/12/03
- [PATCH 10/11] target/arm: Implement ATS1E1 system registers, Richard Henderson, 2019/12/03