Merge remote-tracking branch 'remotes/pmaydell/tags/pull-target-arm-20190201' into staging

target-arm queue:
 * New machine mps2-an521 -- this is a model of the AN521 FPGA image for the MPS2 devboard
 * Fix various places where we failed to UNDEF invalid A64 instructions
 * Don't UNDEF a valid FCMLA on 32-bit inputs
 * Fix some bugs in the newly-added PAuth implementation
 * microbit: Implement NVMC non-volatile memory controller

# gpg: Signature made Fri 01 Feb 2019 16:06:03 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]
# Primary key fingerprint: E1A5 C593 CD41 9DE2 8E83  15CF 3C25 25ED 1436 0CDE

* remotes/pmaydell/tags/pull-target-arm-20190201: (47 commits)
  tests/microbit-test: Add tests for nRF51 NVMC
  arm: Instantiate NRF51 special NVM's and NVMC
  hw/nvram/nrf51_nvm: Add nRF51 non-volatile memories
  target/arm: fix decoding of B{,L}RA{A,B}
  target/arm: fix AArch64 virtual address space size
  linux-user: Initialize aarch64 pac keys
  aarch64-linux-user: Enable HWCAP bits for PAuth
  aarch64-linux-user: Update HWCAP bits from linux 5.0-rc1
  target/arm: Always enable pac keys for user-only
  arm: Clarify the logic of set_pc()
  target/arm: Enable API, APK bits in SCR, HCR
  target/arm: Add a timer to predict PMU counter overflow
  target/arm: Send interrupts on PMU counter overflow
  target/arm/translate-a64: Fix mishandling of size in FCMLA decode
  target/arm/translate-a64: Fix FCMLA decoding error
  exec.c: Don't reallocate IOMMUNotifiers that are in use
  target/arm/translate-a64: Don't underdecode SDOT and UDOT
  target/arm/translate-a64: Don't underdecode FP insns
  target/arm/translate-a64: Don't underdecode add/sub extended register
  target/arm/translate-a64: Don't underdecode SIMD ld/st single
  ...

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

3 files changed, 41 insertions, 2 deletions

diff --git a/linux-user/aarch64/cpu_loop.c b/linux-user/aarch64/cpu_loop.c
index 65d815f030..d75fd9d3e2 100644
--- a/linux-user/aarch64/cpu_loop.c
+++ b/linux-user/aarch64/cpu_loop.c
@@ -147,10 +147,29 @@ void cpu_loop(CPUARMState *env)
     }
 }
 
+static uint64_t arm_rand64(void)
+{
+    int shift = 64 - clz64(RAND_MAX);
+    int i, n = 64 / shift + (64 % shift != 0);
+    uint64_t ret = 0;
+
+    for (i = 0; i < n; i++) {
+        ret = (ret << shift) | rand();
+    }
+    return ret;
+}
+
+void arm_init_pauth_key(ARMPACKey *key)
+{
+    key->lo = arm_rand64();
+    key->hi = arm_rand64();
+}
+
 void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
 {
-    CPUState *cpu = ENV_GET_CPU(env);
-    TaskState *ts = cpu->opaque;
+    ARMCPU *cpu = arm_env_get_cpu(env);
+    CPUState *cs = CPU(cpu);
+    TaskState *ts = cs->opaque;
     struct image_info *info = ts->info;
     int i;
 
@@ -172,6 +191,14 @@ void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
     }
 #endif
 
+    if (cpu_isar_feature(aa64_pauth, cpu)) {
+        arm_init_pauth_key(&env->apia_key);
+        arm_init_pauth_key(&env->apib_key);
+        arm_init_pauth_key(&env->apda_key);
+        arm_init_pauth_key(&env->apdb_key);
+        arm_init_pauth_key(&env->apga_key);
+    }
+
     ts->stack_base = info->start_stack;
     ts->heap_base = info->brk;
     /* This will be filled in on the first SYS_HEAPINFO call.  */
diff --git a/linux-user/aarch64/target_syscall.h b/linux-user/aarch64/target_syscall.h
index 205265e619..937fd7989e 100644
--- a/linux-user/aarch64/target_syscall.h
+++ b/linux-user/aarch64/target_syscall.h
@@ -22,4 +22,6 @@ struct target_pt_regs {
 #define TARGET_PR_SVE_SET_VL  50
 #define TARGET_PR_SVE_GET_VL  51
 
+void arm_init_pauth_key(ARMPACKey *key);
+
 #endif /* AARCH64_TARGET_SYSCALL_H */
diff --git a/linux-user/elfload.c b/linux-user/elfload.c
index 4cff9e1a31..775a36ccdd 100644
--- a/linux-user/elfload.c
+++ b/linux-user/elfload.c
@@ -560,6 +560,15 @@ enum {
     ARM_HWCAP_A64_ASIMDDP       = 1 << 20,
     ARM_HWCAP_A64_SHA512        = 1 << 21,
     ARM_HWCAP_A64_SVE           = 1 << 22,
+    ARM_HWCAP_A64_ASIMDFHM      = 1 << 23,
+    ARM_HWCAP_A64_DIT           = 1 << 24,
+    ARM_HWCAP_A64_USCAT         = 1 << 25,
+    ARM_HWCAP_A64_ILRCPC        = 1 << 26,
+    ARM_HWCAP_A64_FLAGM         = 1 << 27,
+    ARM_HWCAP_A64_SSBS          = 1 << 28,
+    ARM_HWCAP_A64_SB            = 1 << 29,
+    ARM_HWCAP_A64_PACA          = 1 << 30,
+    ARM_HWCAP_A64_PACG          = 1UL << 31,
 };
 
 #define ELF_HWCAP get_elf_hwcap()
@@ -591,6 +600,7 @@ static uint32_t get_elf_hwcap(void)
     GET_FEATURE_ID(aa64_dp, ARM_HWCAP_A64_ASIMDDP);
     GET_FEATURE_ID(aa64_fcma, ARM_HWCAP_A64_FCMA);
     GET_FEATURE_ID(aa64_sve, ARM_HWCAP_A64_SVE);
+    GET_FEATURE_ID(aa64_pauth, ARM_HWCAP_A64_PACA | ARM_HWCAP_A64_PACG);
 
 #undef GET_FEATURE_ID