Merge tag 'pull-target-arm-20250916' of https://gitlab.com/pm215/qemu into staging

target-arm queue:
 * tests, scripts: Don't import print_function from __future__
 * Implement FEAT_ATS1A
 * Remove deprecated pxa CPU family
 * arm/kvm: report registers we failed to set
 * Expose SME registers to GDB via gdbstub
 * linux-user/aarch64: Generate ESR signal records
 * hw/arm/raspi4b: remove redundant check in raspi_add_memory_node
 * hw/arm/virt: Allow user-creatable SMMUv3 dev instantiation
 * system: drop the -old-param option

# -----BEGIN PGP SIGNATURE-----
#
# iQJNBAABCAA3FiEE4aXFk81BneKOgxXPPCUl7RQ2DN4FAmjJpt8ZHHBldGVyLm1h
# eWRlbGxAbGluYXJvLm9yZwAKCRA8JSXtFDYM3vRGEACO3VrePiMIA9N7egqlUiGn
# aRQVqIKeuPVj6TRVG7BSNWlAX8qvnOWOKg1yGVHDZv/nLvRje9UyfUAw7pf6jXod
# bzxWBCPJ0J0eOB64Tz87WRCLltKB5pEN+uIG00PtpBcXT1ixYCDgBZXyD3mwuJ4Q
# 5Yc5hEwQzpmh+EycLtfCHbmjKDw3x1ncpVlGceOG4h5fvzIvIhcNcZJXfAHhbhyO
# Y4c5PELrCkCLZaTtSSxd6VJ+vXQ9bNWyKaSZu2KRRnLcMeAqw2Ic7dLPlkzCVyxM
# PTOHy4TuDu+kqCbkxdnhpI6fvq5kcHyfTL6qX6tth8ZZS+qKGtvMEIXnYoy6q1kh
# 4jV5vizK8avx31fSiuTKVpttRv4dC+Aq5QrcgYtIVMeOwtkWHv610D8gcFPmXoG+
# uHX9WdzOjrYOzXVKzJaCZF6b7L31ptSEfOrx7asBC9k2wPRwonFXg4JGNq16Yann
# aAO5TM7NAUvM2IPgqS+Tf1Bk0iQqORxGfqzCyL76OO/QMMgfBy9elKH0UR0G+ePJ
# yjpub1oWIELSXsQGMrdFo1W4/NIpFMTu3DP9W+6XRPu1AvrAx/AsrTuvSvXoeFY9
# d/U3yWAXm5XxRzbCIUg7ke8I8zLwRz924M5PA8vophvSnfDLS3V8CJHLwbz/PqYc
# 0P2KCeI6d2NIhVik4mgEoQ==
# =5tK3
# -----END PGP SIGNATURE-----
# gpg: Signature made Tue 16 Sep 2025 11:05:19 AM PDT
# gpg:                using RSA key E1A5C593CD419DE28E8315CF3C2525ED14360CDE
# gpg:                issuer "peter.maydell@linaro.org"
# gpg: Good signature from "Peter Maydell <peter.maydell@linaro.org>" [unknown]
# gpg:                 aka "Peter Maydell <pmaydell@gmail.com>" [unknown]
# gpg:                 aka "Peter Maydell <pmaydell@chiark.greenend.org.uk>" [unknown]
# gpg:                 aka "Peter Maydell <peter@archaic.org.uk>" [unknown]
# gpg: WARNING: The key's User ID is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: E1A5 C593 CD41 9DE2 8E83  15CF 3C25 25ED 1436 0CDE

* tag 'pull-target-arm-20250916' of https://gitlab.com/pm215/qemu: (36 commits)
  hw/usb/network: Remove hardcoded 0x40 prefix in STRING_ETHADDR response
  qtest/bios-tables-test: Update tables for smmuv3 tests
  qtest/bios-tables-test: Add tests for legacy smmuv3 and smmuv3 device
  bios-tables-test: Allow for smmuv3 test data.
  qemu-options.hx: Document the arm-smmuv3 device
  hw/arm/virt: Allow user-creatable SMMUv3 dev instantiation
  hw/pci: Introduce pci_setup_iommu_per_bus() for per-bus IOMMU ops retrieval
  hw/arm/virt: Add an SMMU_IO_LEN macro
  hw/arm/virt: Factor out common SMMUV3 dt bindings code
  hw/arm/virt-acpi-build: Update IORT for multiple smmuv3 devices
  hw/arm/virt-acpi-build: Re-arrange SMMUv3 IORT build
  hw/arm/smmu-common: Check SMMU has PCIe Root Complex association
  target/arm: Added test case for SME register exposure to GDB
  target/arm: Added support for SME register exposure to GDB
  target/arm: Increase MAX_PACKET_LENGTH for SME ZA remote gdb debugging
  arm/kvm: report registers we failed to set
  system: drop the -old-param option
  target/arm: Drop ARM_FEATURE_IWMMXT handling
  target/arm: Drop ARM_FEATURE_XSCALE handling
  target/arm: Remove iwmmxt helper functions
  ...

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

1 files changed, 33 insertions, 1 deletions

diff --git a/linux-user/aarch64/signal.c b/linux-user/aarch64/signal.c
index 668353bbda..ef97be3ac7 100644
--- a/linux-user/aarch64/signal.c
+++ b/linux-user/aarch64/signal.c
@@ -65,6 +65,13 @@ struct target_fpsimd_context {
     uint64_t vregs[32 * 2]; /* really uint128_t vregs[32] */
 };
 
+#define TARGET_ESR_MAGIC    0x45535201
+
+struct target_esr_context {
+    struct target_aarch64_ctx head;
+    uint64_t esr;
+};
+
 #define TARGET_EXTRA_MAGIC  0x45585401
 
 struct target_extra_context {
@@ -201,6 +208,14 @@ static void target_setup_fpsimd_record(struct target_fpsimd_context *fpsimd,
     }
 }
 
+static void target_setup_esr_record(struct target_esr_context *ctx,
+                                    CPUARMState *env)
+{
+    __put_user(TARGET_ESR_MAGIC, &ctx->head.magic);
+    __put_user(sizeof(*ctx), &ctx->head.size);
+    __put_user(env->cp15.esr_el[1], &ctx->esr);
+}
+
 static void target_setup_extra_record(struct target_extra_context *extra,
                                       uint64_t datap, uint32_t extra_size)
 {
@@ -531,6 +546,9 @@ static int target_restore_sigframe(CPUARMState *env,
             fpsimd = (struct target_fpsimd_context *)ctx;
             break;
 
+        case TARGET_ESR_MAGIC:
+            break; /* ignore */
+
         case TARGET_SVE_MAGIC:
             if (sve || size < sizeof(struct target_sve_context)) {
                 goto err;
@@ -683,7 +701,7 @@ static void target_setup_frame(int usig, struct target_sigaction *ka,
                                uc.tuc_mcontext.__reserved),
     };
     int fpsimd_ofs, fr_ofs, sve_ofs = 0, za_ofs = 0, tpidr2_ofs = 0;
-    int zt_ofs = 0;
+    int zt_ofs = 0, esr_ofs = 0;
     int sve_size = 0, za_size = 0, tpidr2_size = 0, zt_size = 0;
     struct target_rt_sigframe *frame;
     struct target_rt_frame_record *fr;
@@ -693,6 +711,15 @@ static void target_setup_frame(int usig, struct target_sigaction *ka,
     fpsimd_ofs = alloc_sigframe_space(sizeof(struct target_fpsimd_context),
                                       &layout);
 
+    /*
+     * In user mode, ESR_EL1 is only set by cpu_loop while queueing the
+     * signal, and it's only valid for the one sync insn.
+     */
+    if (env->cp15.esr_el[1]) {
+        esr_ofs = alloc_sigframe_space(sizeof(struct target_esr_context),
+                                       &layout);
+    }
+
     /* SVE state needs saving only if it exists.  */
     if (cpu_isar_feature(aa64_sve, env_archcpu(env)) ||
         cpu_isar_feature(aa64_sme, env_archcpu(env))) {
@@ -754,6 +781,11 @@ static void target_setup_frame(int usig, struct target_sigaction *ka,
 
     target_setup_general_frame(frame, env, set);
     target_setup_fpsimd_record((void *)frame + fpsimd_ofs, env);
+    if (esr_ofs) {
+        target_setup_esr_record((void *)frame + esr_ofs, env);
+        /* Leave ESR_EL1 clear while it's not relevant. */
+        env->cp15.esr_el[1] = 0;
+    }
     target_setup_end_record((void *)frame + layout.std_end_ofs);
     if (layout.extra_ofs) {
         target_setup_extra_record((void *)frame + layout.extra_ofs,