Merge tag 'pull-target-arm-20241119' of https://git.linaro.org/people/pmaydell/qemu-arm into staging

target-arm queue:
 * hw/timer/exynos4210_mct: fix possible int overflow
 * hw/net/rocker/rocker_of_dpa.c: Remove superfluous error check
 * hw/intc/openpic: Avoid taking address of out-of-bounds array index
 * hw/watchdog/cmsdk_apb_watchdog: Fix INTEN issues
 * arm/ptw: Honour WXN/UWXN and SIF in short-format descriptors
 * hw/intc/loongarch_extioi: Use set_bit32() and clear_bit32() to avoid UB
 * system/dma-helpers.c: Move trace events to system/trace-events
 * target/arm/hvf: Add trace.h header
 * trace: Don't include trace-root.h in control.c or control-target.c

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# gpg: Signature made Tue 19 Nov 2024 14:20:44 GMT
# gpg:                using RSA key E1A5C593CD419DE28E8315CF3C2525ED14360CDE
# gpg:                issuer "peter.maydell@linaro.org"
# gpg: Good signature from "Peter Maydell <peter.maydell@linaro.org>" [ultimate]
# gpg:                 aka "Peter Maydell <pmaydell@gmail.com>" [ultimate]
# gpg:                 aka "Peter Maydell <pmaydell@chiark.greenend.org.uk>" [ultimate]
# gpg:                 aka "Peter Maydell <peter@archaic.org.uk>" [ultimate]
# Primary key fingerprint: E1A5 C593 CD41 9DE2 8E83  15CF 3C25 25ED 1436 0CDE

* tag 'pull-target-arm-20241119' of https://git.linaro.org/people/pmaydell/qemu-arm:
  trace: Don't include trace-root.h in control.c or control-target.c
  target/arm/hvf: Add trace.h header
  system/dma-helpers.c: Move trace events to system/trace-events
  hw/intc/loongarch_extioi: Use set_bit32() and clear_bit32() for s->isr
  hw/intc/arm_gicv3: Use bitops.h uint32_t bit array functions
  bitops.h: Define bit operations on 'uint32_t' arrays
  arm/ptw: Honour WXN/UWXN and SIF in short-format descriptors
  arm/ptw: Make get_S1prot accept decoded AP
  tests/qtest/cmsdk-apb-watchdog-test: Test INTEN as counter enable
  tests/qtest/cmsdk-apb-watchdog-test: Don't abort on assertion failure
  tests/qtest/cmsdk-apb-watchdog-test: Parameterize tests
  hw/watchdog/cmsdk_apb_watchdog: Fix INTEN issues
  hw/intc/openpic: Avoid taking address of out-of-bounds array index
  hw/net/rocker/rocker_of_dpa.c: Remove superfluous error check
  hw/timer/exynos4210_mct: fix possible int overflow

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 33 insertions, 39 deletions

diff --git a/target/arm/ptw.c b/target/arm/ptw.c
index 9849949508..64bb6878a4 100644
--- a/target/arm/ptw.c
+++ b/target/arm/ptw.c
@@ -85,6 +85,10 @@ static bool get_phys_addr_gpc(CPUARMState *env, S1Translate *ptw,
                               GetPhysAddrResult *result,
                               ARMMMUFaultInfo *fi);
 
+static int get_S1prot(CPUARMState *env, ARMMMUIdx mmu_idx, bool is_aa64,
+                      int user_rw, int prot_rw, int xn, int pxn,
+                      ARMSecuritySpace in_pa, ARMSecuritySpace out_pa);
+
 /* This mapping is common between ID_AA64MMFR0.PARANGE and TCR_ELx.{I}PS. */
 static const uint8_t pamax_map[] = {
     [0] = 32,
@@ -1148,7 +1152,7 @@ static bool get_phys_addr_v6(CPUARMState *env, S1Translate *ptw,
     hwaddr phys_addr;
     uint32_t dacr;
     bool ns;
-    int user_prot;
+    ARMSecuritySpace out_space;
 
     /* Pagetable walk.  */
     /* Lookup l1 descriptor.  */
@@ -1240,16 +1244,19 @@ static bool get_phys_addr_v6(CPUARMState *env, S1Translate *ptw,
             g_assert_not_reached();
         }
     }
+    out_space = ptw->in_space;
+    if (ns) {
+        /*
+         * The NS bit will (as required by the architecture) have no effect if
+         * the CPU doesn't support TZ or this is a non-secure translation
+         * regime, because the output space will already be non-secure.
+         */
+        out_space = ARMSS_NonSecure;
+    }
     if (domain_prot == 3) {
         result->f.prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
     } else {
-        if (pxn && !regime_is_user(env, mmu_idx)) {
-            xn = 1;
-        }
-        if (xn && access_type == MMU_INST_FETCH) {
-            fi->type = ARMFault_Permission;
-            goto do_fault;
-        }
+        int user_rw, prot_rw;
 
         if (arm_feature(env, ARM_FEATURE_V6K) &&
                 (regime_sctlr(env, mmu_idx) & SCTLR_AFE)) {
@@ -1259,37 +1266,23 @@ static bool get_phys_addr_v6(CPUARMState *env, S1Translate *ptw,
                 fi->type = ARMFault_AccessFlag;
                 goto do_fault;
             }
-            result->f.prot = simple_ap_to_rw_prot(env, mmu_idx, ap >> 1);
-            user_prot = simple_ap_to_rw_prot_is_user(ap >> 1, 1);
+            prot_rw = simple_ap_to_rw_prot(env, mmu_idx, ap >> 1);
+            user_rw = simple_ap_to_rw_prot_is_user(ap >> 1, 1);
         } else {
-            result->f.prot = ap_to_rw_prot(env, mmu_idx, ap, domain_prot);
-            user_prot = ap_to_rw_prot_is_user(env, mmu_idx, ap, domain_prot, 1);
-        }
-        if (result->f.prot && !xn) {
-            result->f.prot |= PAGE_EXEC;
+            prot_rw = ap_to_rw_prot(env, mmu_idx, ap, domain_prot);
+            user_rw = ap_to_rw_prot_is_user(env, mmu_idx, ap, domain_prot, 1);
         }
+
+        result->f.prot = get_S1prot(env, mmu_idx, false, user_rw, prot_rw,
+                                    xn, pxn, result->f.attrs.space, out_space);
         if (!(result->f.prot & (1 << access_type))) {
             /* Access permission fault.  */
             fi->type = ARMFault_Permission;
             goto do_fault;
         }
-        if (regime_is_pan(env, mmu_idx) &&
-            !regime_is_user(env, mmu_idx) &&
-            user_prot &&
-            access_type != MMU_INST_FETCH) {
-            /* Privileged Access Never fault */
-            fi->type = ARMFault_Permission;
-            goto do_fault;
-        }
-    }
-    if (ns) {
-        /* The NS bit will (as required by the architecture) have no effect if
-         * the CPU doesn't support TZ or this is a non-secure translation
-         * regime, because the attribute will already be non-secure.
-         */
-        result->f.attrs.secure = false;
-        result->f.attrs.space = ARMSS_NonSecure;
     }
+    result->f.attrs.space = out_space;
+    result->f.attrs.secure = arm_space_is_secure(out_space);
     result->f.phys_addr = phys_addr;
     return false;
 do_fault:
@@ -1357,25 +1350,24 @@ static int get_S2prot(CPUARMState *env, int s2ap, int xn, bool s1_is_el0)
  * @env:     CPUARMState
  * @mmu_idx: MMU index indicating required translation regime
  * @is_aa64: TRUE if AArch64
- * @ap:      The 2-bit simple AP (AP[2:1])
+ * @user_rw: Translated AP for user access
+ * @prot_rw: Translated AP for privileged access
  * @xn:      XN (execute-never) bit
  * @pxn:     PXN (privileged execute-never) bit
  * @in_pa:   The original input pa space
  * @out_pa:  The output pa space, modified by NSTable, NS, and NSE
  */
 static int get_S1prot(CPUARMState *env, ARMMMUIdx mmu_idx, bool is_aa64,
-                      int ap, int xn, int pxn,
+                      int user_rw, int prot_rw, int xn, int pxn,
                       ARMSecuritySpace in_pa, ARMSecuritySpace out_pa)
 {
     ARMCPU *cpu = env_archcpu(env);
     bool is_user = regime_is_user(env, mmu_idx);
-    int prot_rw, user_rw;
     bool have_wxn;
     int wxn = 0;
 
     assert(!regime_is_stage2(mmu_idx));
 
-    user_rw = simple_ap_to_rw_prot_is_user(ap, true);
     if (is_user) {
         prot_rw = user_rw;
     } else {
@@ -1393,8 +1385,6 @@ static int get_S1prot(CPUARMState *env, ARMMMUIdx mmu_idx, bool is_aa64,
                    regime_is_pan(env, mmu_idx) &&
                    (regime_sctlr(env, mmu_idx) & SCTLR_EPAN) && !xn) {
             prot_rw = 0;
-        } else {
-            prot_rw = simple_ap_to_rw_prot_is_user(ap, false);
         }
     }
 
@@ -2044,6 +2034,7 @@ static bool get_phys_addr_lpae(CPUARMState *env, S1Translate *ptw,
         int nse, ns = extract32(attrs, 5, 1);
         uint8_t attrindx;
         uint64_t mair;
+        int user_rw, prot_rw;
 
         switch (out_space) {
         case ARMSS_Root:
@@ -2110,12 +2101,15 @@ static bool get_phys_addr_lpae(CPUARMState *env, S1Translate *ptw,
             xn = 0;
             ap &= ~1;
         }
+
+        user_rw = simple_ap_to_rw_prot_is_user(ap, true);
+        prot_rw = simple_ap_to_rw_prot_is_user(ap, false);
         /*
          * Note that we modified ptw->in_space earlier for NSTable, but
          * result->f.attrs retains a copy of the original security space.
          */
-        result->f.prot = get_S1prot(env, mmu_idx, aarch64, ap, xn, pxn,
-                                    result->f.attrs.space, out_space);
+        result->f.prot = get_S1prot(env, mmu_idx, aarch64, user_rw, prot_rw,
+                                    xn, pxn, result->f.attrs.space, out_space);
 
         /* Index into MAIR registers for cache attributes */
         attrindx = extract32(attrs, 2, 3);