Merge remote-tracking branch 'remotes/pmaydell/tags/pull-target-arm-20190708' into staging

target-arm queue:
 * tests/migration-test: Fix read off end of aarch64_kernel array
 * Fix sve_zcr_len_for_el off-by-one error
 * hw/arm/sbsa-ref: Silence Coverity nit
 * vfp_helper: Call set_fpscr_to_host before updating to FPSCR

# gpg: Signature made Mon 08 Jul 2019 14:21:20 BST
# 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-20190708:
  target/arm/vfp_helper: Call set_fpscr_to_host before updating to FPSCR
  hw/arm/sbsa-ref: Remove unnecessary check for secure_sysmem == NULL
  tests/migration-test: Fix read off end of aarch64_kernel array
  target/arm: Fix sve_zcr_len_for_el

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

4 files changed, 13 insertions, 25 deletions

diff --git a/hw/arm/sbsa-ref.c b/hw/arm/sbsa-ref.c
index e8c65e3..9c67d5c 100644
--- a/hw/arm/sbsa-ref.c
+++ b/hw/arm/sbsa-ref.c
@@ -254,8 +254,6 @@ static void sbsa_flash_map(SBSAMachineState *sms,
      * sysmem is the system memory space. secure_sysmem is the secure view
      * of the system, and the first flash device should be made visible only
      * there. The second flash device is visible to both secure and nonsecure.
-     * If sysmem == secure_sysmem this means there is no separate Secure
-     * address space and both flash devices are generally visible.
      */
     hwaddr flashsize = sbsa_ref_memmap[SBSA_FLASH].size / 2;
     hwaddr flashbase = sbsa_ref_memmap[SBSA_FLASH].base;
@@ -591,7 +589,7 @@ static void sbsa_ref_init(MachineState *machine)
     SBSAMachineState *sms = SBSA_MACHINE(machine);
     MachineClass *mc = MACHINE_GET_CLASS(machine);
     MemoryRegion *sysmem = get_system_memory();
-    MemoryRegion *secure_sysmem = NULL;
+    MemoryRegion *secure_sysmem = g_new(MemoryRegion, 1);
     MemoryRegion *ram = g_new(MemoryRegion, 1);
     bool firmware_loaded;
     const CPUArchIdList *possible_cpus;
@@ -615,13 +613,11 @@ static void sbsa_ref_init(MachineState *machine)
      * containing the system memory at low priority; any secure-only
      * devices go in at higher priority and take precedence.
      */
-    secure_sysmem = g_new(MemoryRegion, 1);
     memory_region_init(secure_sysmem, OBJECT(machine), "secure-memory",
                        UINT64_MAX);
     memory_region_add_subregion_overlap(secure_sysmem, 0, sysmem, -1);
 
-    firmware_loaded = sbsa_firmware_init(sms, sysmem,
-                                         secure_sysmem ?: sysmem);
+    firmware_loaded = sbsa_firmware_init(sms, sysmem, secure_sysmem);
 
     if (machine->kernel_filename && firmware_loaded) {
         error_report("sbsa-ref: No fw_cfg device on this machine, "
diff --git a/target/arm/helper.c b/target/arm/helper.c
index 2df7152..20f8728 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -5283,10 +5283,10 @@ uint32_t sve_zcr_len_for_el(CPUARMState *env, int el)
     if (el <= 1) {
         zcr_len = MIN(zcr_len, 0xf & (uint32_t)env->vfp.zcr_el[1]);
     }
-    if (el < 2 && arm_feature(env, ARM_FEATURE_EL2)) {
+    if (el <= 2 && arm_feature(env, ARM_FEATURE_EL2)) {
         zcr_len = MIN(zcr_len, 0xf & (uint32_t)env->vfp.zcr_el[2]);
     }
-    if (el < 3 && arm_feature(env, ARM_FEATURE_EL3)) {
+    if (arm_feature(env, ARM_FEATURE_EL3)) {
         zcr_len = MIN(zcr_len, 0xf & (uint32_t)env->vfp.zcr_el[3]);
     }
     return zcr_len;
diff --git a/target/arm/vfp_helper.c b/target/arm/vfp_helper.c
index 46041e3..9710ef1 100644
--- a/target/arm/vfp_helper.c
+++ b/target/arm/vfp_helper.c
@@ -197,6 +197,8 @@ void HELPER(vfp_set_fpscr)(CPUARMState *env, uint32_t val)
         val &= 0xf7c0009f;
     }
 
+    vfp_set_fpscr_to_host(env, val);
+
     /*
      * We don't implement trapped exception handling, so the
      * trap enable bits, IDE|IXE|UFE|OFE|DZE|IOE are all RAZ/WI (not RES0!)
@@ -217,8 +219,6 @@ void HELPER(vfp_set_fpscr)(CPUARMState *env, uint32_t val)
     env->vfp.qc[1] = 0;
     env->vfp.qc[2] = 0;
     env->vfp.qc[3] = 0;
-
-    vfp_set_fpscr_to_host(env, val);
 }
 
 void vfp_set_fpscr(CPUARMState *env, uint32_t val)
diff --git a/tests/migration-test.c b/tests/migration-test.c
index 0cd014d..b643462 100644
--- a/tests/migration-test.c
+++ b/tests/migration-test.c
@@ -91,23 +91,13 @@ static const char *tmpfs;
  */
 #include "tests/migration/i386/a-b-bootblock.h"
 #include "tests/migration/aarch64/a-b-kernel.h"
-
-static void init_bootfile(const char *bootpath, void *content)
-{
-    FILE *bootfile = fopen(bootpath, "wb");
-
-    g_assert_cmpint(fwrite(content, 512, 1, bootfile), ==, 1);
-    fclose(bootfile);
-}
-
 #include "tests/migration/s390x/a-b-bios.h"
 
-static void init_bootfile_s390x(const char *bootpath)
+static void init_bootfile(const char *bootpath, void *content, size_t len)
 {
     FILE *bootfile = fopen(bootpath, "wb");
-    size_t len = sizeof(s390x_elf);
 
-    g_assert_cmpint(fwrite(s390x_elf, len, 1, bootfile), ==, 1);
+    g_assert_cmpint(fwrite(content, len, 1, bootfile), ==, 1);
     fclose(bootfile);
 }
 
@@ -537,7 +527,9 @@ static int test_migrate_start(QTestState **from, QTestState **to,
     got_stop = false;
     bootpath = g_strdup_printf("%s/bootsect", tmpfs);
     if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) {
-        init_bootfile(bootpath, x86_bootsect);
+        /* the assembled x86 boot sector should be exactly one sector large */
+        assert(sizeof(x86_bootsect) == 512);
+        init_bootfile(bootpath, x86_bootsect, sizeof(x86_bootsect));
         extra_opts = use_shmem ? get_shmem_opts("150M", shmem_path) : NULL;
         cmd_src = g_strdup_printf("-machine accel=%s -m 150M"
                                   " -name source,debug-threads=on"
@@ -555,7 +547,7 @@ static int test_migrate_start(QTestState **from, QTestState **to,
         start_address = X86_TEST_MEM_START;
         end_address = X86_TEST_MEM_END;
     } else if (g_str_equal(arch, "s390x")) {
-        init_bootfile_s390x(bootpath);
+        init_bootfile(bootpath, s390x_elf, sizeof(s390x_elf));
         extra_opts = use_shmem ? get_shmem_opts("128M", shmem_path) : NULL;
         cmd_src = g_strdup_printf("-machine accel=%s -m 128M"
                                   " -name source,debug-threads=on"
@@ -590,7 +582,7 @@ static int test_migrate_start(QTestState **from, QTestState **to,
         start_address = PPC_TEST_MEM_START;
         end_address = PPC_TEST_MEM_END;
     } else if (strcmp(arch, "aarch64") == 0) {
-        init_bootfile(bootpath, aarch64_kernel);
+        init_bootfile(bootpath, aarch64_kernel, sizeof(aarch64_kernel));
         extra_opts = use_shmem ? get_shmem_opts("150M", shmem_path) : NULL;
         cmd_src = g_strdup_printf("-machine virt,accel=%s,gic-version=max "
                                   "-name vmsource,debug-threads=on -cpu max "