Merge tag 'for-upstream' of https://gitlab.com/bonzini/qemu into staging

* x86: re-enable rng seeding via SetupData
* x86: reinitialize RNG seed on system reboot and after kernel load
* qboot: rebuild based on latest commit
* watchdog: remove -watchdog option
* update Meson to 0.61.5, move more configure tests

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# gpg: Signature made Sat 01 Oct 2022 15:16:48 EDT
# gpg:                using RSA key F13338574B662389866C7682BFFBD25F78C7AE83
# gpg:                issuer "pbonzini@redhat.com"
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" [full]
# gpg:                 aka "Paolo Bonzini <pbonzini@redhat.com>" [full]
# Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4  E2F7 7E15 100C CD36 69B1
#      Subkey fingerprint: F133 3857 4B66 2389 866C  7682 BFFB D25F 78C7 AE83

* tag 'for-upstream' of https://gitlab.com/bonzini/qemu:
  x86: re-initialize RNG seed when selecting kernel
  target/i386/kvm: fix kvmclock_current_nsec: Assertion `time.tsc_timestamp <= migration_tsc' failed
  configure, meson: move linker flag detection to meson
  configure, meson: move C++ compiler detection to meson.build
  meson: multiple names can be passed to dependency()
  meson: require 0.61.3
  meson: -display dbus and CFI are incompatible
  ui: fix path to dbus-display1.h
  watchdog: remove -watchdog option
  configure: do not invoke as/ld directly for pc-bios/optionrom
  qboot: rebuild based on latest commit
  x86: re-enable rng seeding via SetupData
  x86: reinitialize RNG seed on system reboot
  x86: use typedef for SetupData struct
  x86: return modified setup_data only if read as memory, not as file

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

12 files changed, 64 insertions, 105 deletions

diff --git a/hw/i386/microvm.c b/hw/i386/microvm.c
index 52cafa003d..7fe8cce03e 100644
--- a/hw/i386/microvm.c
+++ b/hw/i386/microvm.c
@@ -332,7 +332,7 @@ static void microvm_memory_init(MicrovmMachineState *mms)
     rom_set_fw(fw_cfg);
 
     if (machine->kernel_filename != NULL) {
-        x86_load_linux(x86ms, fw_cfg, 0, true, true);
+        x86_load_linux(x86ms, fw_cfg, 0, true, false);
     }
 
     if (mms->option_roms) {
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index 8043a250ad..0b1a79c0fa 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -439,7 +439,6 @@ static void pc_i440fx_7_2_machine_options(MachineClass *m)
     m->alias = "pc";
     m->is_default = true;
     pcmc->default_cpu_version = 1;
-    pcmc->legacy_no_rng_seed = true;
 }
 
 DEFINE_I440FX_MACHINE(v7_2, "pc-i440fx-7.2", NULL,
@@ -447,9 +446,11 @@ DEFINE_I440FX_MACHINE(v7_2, "pc-i440fx-7.2", NULL,
 
 static void pc_i440fx_7_1_machine_options(MachineClass *m)
 {
+    PCMachineClass *pcmc = PC_MACHINE_CLASS(m);
     pc_i440fx_7_2_machine_options(m);
     m->alias = NULL;
     m->is_default = false;
+    pcmc->legacy_no_rng_seed = true;
     compat_props_add(m->compat_props, hw_compat_7_1, hw_compat_7_1_len);
     compat_props_add(m->compat_props, pc_compat_7_1, pc_compat_7_1_len);
 }
diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
index 53eda50e81..a496bd6e74 100644
--- a/hw/i386/pc_q35.c
+++ b/hw/i386/pc_q35.c
@@ -376,7 +376,6 @@ static void pc_q35_7_2_machine_options(MachineClass *m)
     pc_q35_machine_options(m);
     m->alias = "q35";
     pcmc->default_cpu_version = 1;
-    pcmc->legacy_no_rng_seed = true;
 }
 
 DEFINE_Q35_MACHINE(v7_2, "pc-q35-7.2", NULL,
@@ -384,8 +383,10 @@ DEFINE_Q35_MACHINE(v7_2, "pc-q35-7.2", NULL,
 
 static void pc_q35_7_1_machine_options(MachineClass *m)
 {
+    PCMachineClass *pcmc = PC_MACHINE_CLASS(m);
     pc_q35_7_2_machine_options(m);
     m->alias = NULL;
+    pcmc->legacy_no_rng_seed = true;
     compat_props_add(m->compat_props, hw_compat_7_1, hw_compat_7_1_len);
     compat_props_add(m->compat_props, pc_compat_7_1, pc_compat_7_1_len);
 }
diff --git a/hw/i386/x86.c b/hw/i386/x86.c
index 050eedc0c8..1148f70c03 100644
--- a/hw/i386/x86.c
+++ b/hw/i386/x86.c
@@ -37,6 +37,7 @@
 #include "sysemu/whpx.h"
 #include "sysemu/numa.h"
 #include "sysemu/replay.h"
+#include "sysemu/reset.h"
 #include "sysemu/sysemu.h"
 #include "sysemu/cpu-timers.h"
 #include "sysemu/xen.h"
@@ -652,12 +653,12 @@ DeviceState *ioapic_init_secondary(GSIState *gsi_state)
     return dev;
 }
 
-struct setup_data {
+typedef struct SetupData {
     uint64_t next;
     uint32_t type;
     uint32_t len;
     uint8_t data[];
-} __attribute__((packed));
+} __attribute__((packed)) SetupData;
 
 
 /*
@@ -764,6 +765,30 @@ static bool load_elfboot(const char *kernel_filename,
     return true;
 }
 
+typedef struct SetupDataFixup {
+    void *pos;
+    hwaddr orig_val, new_val;
+    uint32_t addr;
+} SetupDataFixup;
+
+static void fixup_setup_data(void *opaque)
+{
+    SetupDataFixup *fixup = opaque;
+    stq_p(fixup->pos, fixup->new_val);
+}
+
+static void reset_setup_data(void *opaque)
+{
+    SetupDataFixup *fixup = opaque;
+    stq_p(fixup->pos, fixup->orig_val);
+}
+
+static void reset_rng_seed(void *opaque)
+{
+    SetupData *setup_data = opaque;
+    qemu_guest_getrandom_nofail(setup_data->data, le32_to_cpu(setup_data->len));
+}
+
 void x86_load_linux(X86MachineState *x86ms,
                     FWCfgState *fw_cfg,
                     int acpi_data_size,
@@ -780,7 +805,7 @@ void x86_load_linux(X86MachineState *x86ms,
     FILE *f;
     char *vmode;
     MachineState *machine = MACHINE(x86ms);
-    struct setup_data *setup_data;
+    SetupData *setup_data;
     const char *kernel_filename = machine->kernel_filename;
     const char *initrd_filename = machine->initrd_filename;
     const char *dtb_filename = machine->dtb;
@@ -1063,11 +1088,11 @@ void x86_load_linux(X86MachineState *x86ms,
         }
 
         setup_data_offset = QEMU_ALIGN_UP(kernel_size, 16);
-        kernel_size = setup_data_offset + sizeof(struct setup_data) + dtb_size;
+        kernel_size = setup_data_offset + sizeof(SetupData) + dtb_size;
         kernel = g_realloc(kernel, kernel_size);
 
 
-        setup_data = (struct setup_data *)(kernel + setup_data_offset);
+        setup_data = (SetupData *)(kernel + setup_data_offset);
         setup_data->next = cpu_to_le64(first_setup_data);
         first_setup_data = prot_addr + setup_data_offset;
         setup_data->type = cpu_to_le32(SETUP_DTB);
@@ -1078,18 +1103,25 @@ void x86_load_linux(X86MachineState *x86ms,
 
     if (!legacy_no_rng_seed) {
         setup_data_offset = QEMU_ALIGN_UP(kernel_size, 16);
-        kernel_size = setup_data_offset + sizeof(struct setup_data) + RNG_SEED_LENGTH;
+        kernel_size = setup_data_offset + sizeof(SetupData) + RNG_SEED_LENGTH;
         kernel = g_realloc(kernel, kernel_size);
-        setup_data = (struct setup_data *)(kernel + setup_data_offset);
+        setup_data = (SetupData *)(kernel + setup_data_offset);
         setup_data->next = cpu_to_le64(first_setup_data);
         first_setup_data = prot_addr + setup_data_offset;
         setup_data->type = cpu_to_le32(SETUP_RNG_SEED);
         setup_data->len = cpu_to_le32(RNG_SEED_LENGTH);
         qemu_guest_getrandom_nofail(setup_data->data, RNG_SEED_LENGTH);
+        qemu_register_reset(reset_rng_seed, setup_data);
+        fw_cfg_add_bytes_callback(fw_cfg, FW_CFG_KERNEL_DATA, reset_rng_seed, NULL,
+                                  setup_data, kernel, kernel_size, true);
+    } else {
+        fw_cfg_add_bytes(fw_cfg, FW_CFG_KERNEL_DATA, kernel, kernel_size);
     }
 
-    /* Offset 0x250 is a pointer to the first setup_data link. */
-    stq_p(header + 0x250, first_setup_data);
+    fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_ADDR, prot_addr);
+    fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_SIZE, kernel_size);
+    sev_load_ctx.kernel_data = (char *)kernel;
+    sev_load_ctx.kernel_size = kernel_size;
 
     /*
      * If we're starting an encrypted VM, it will be OVMF based, which uses the
@@ -1099,16 +1131,20 @@ void x86_load_linux(X86MachineState *x86ms,
      * file the user passed in.
      */
     if (!sev_enabled()) {
+        SetupDataFixup *fixup = g_malloc(sizeof(*fixup));
+
         memcpy(setup, header, MIN(sizeof(header), setup_size));
+        /* Offset 0x250 is a pointer to the first setup_data link. */
+        fixup->pos = setup + 0x250;
+        fixup->orig_val = ldq_p(fixup->pos);
+        fixup->new_val = first_setup_data;
+        fixup->addr = cpu_to_le32(real_addr);
+        fw_cfg_add_bytes_callback(fw_cfg, FW_CFG_SETUP_ADDR, fixup_setup_data, NULL,
+                                  fixup, &fixup->addr, sizeof(fixup->addr), true);
+        qemu_register_reset(reset_setup_data, fixup);
+    } else {
+        fw_cfg_add_i32(fw_cfg, FW_CFG_SETUP_ADDR, real_addr);
     }
-
-    fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_ADDR, prot_addr);
-    fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_SIZE, kernel_size);
-    fw_cfg_add_bytes(fw_cfg, FW_CFG_KERNEL_DATA, kernel, kernel_size);
-    sev_load_ctx.kernel_data = (char *)kernel;
-    sev_load_ctx.kernel_size = kernel_size;
-
-    fw_cfg_add_i32(fw_cfg, FW_CFG_SETUP_ADDR, real_addr);
     fw_cfg_add_i32(fw_cfg, FW_CFG_SETUP_SIZE, setup_size);
     fw_cfg_add_bytes(fw_cfg, FW_CFG_SETUP_DATA, setup, setup_size);
     sev_load_ctx.setup_data = (char *)setup;
diff --git a/hw/nvram/fw_cfg.c b/hw/nvram/fw_cfg.c
index d605f3f45a..564bda3395 100644
--- a/hw/nvram/fw_cfg.c
+++ b/hw/nvram/fw_cfg.c
@@ -692,12 +692,12 @@ static const VMStateDescription vmstate_fw_cfg = {
     }
 };
 
-static void fw_cfg_add_bytes_callback(FWCfgState *s, uint16_t key,
-                                      FWCfgCallback select_cb,
-                                      FWCfgWriteCallback write_cb,
-                                      void *callback_opaque,
-                                      void *data, size_t len,
-                                      bool read_only)
+void fw_cfg_add_bytes_callback(FWCfgState *s, uint16_t key,
+                               FWCfgCallback select_cb,
+                               FWCfgWriteCallback write_cb,
+                               void *callback_opaque,
+                               void *data, size_t len,
+                               bool read_only)
 {
     int arch = !!(key & FW_CFG_ARCH_LOCAL);
 
diff --git a/hw/watchdog/sbsa_gwdt.c b/hw/watchdog/sbsa_gwdt.c
index e49cacd0e2..7aa57a8c51 100644
--- a/hw/watchdog/sbsa_gwdt.c
+++ b/hw/watchdog/sbsa_gwdt.c
@@ -24,11 +24,6 @@
 #include "qemu/log.h"
 #include "qemu/module.h"
 
-static WatchdogTimerModel model = {
-    .wdt_name = TYPE_WDT_SBSA,
-    .wdt_description = "SBSA-compliant generic watchdog device",
-};
-
 static const VMStateDescription vmstate_sbsa_gwdt = {
     .name = "sbsa-gwdt",
     .version_id = 1,
@@ -287,7 +282,6 @@ static const TypeInfo wdt_sbsa_gwdt_info = {
 
 static void wdt_sbsa_gwdt_register_types(void)
 {
-    watchdog_add_model(&model);
     type_register_static(&wdt_sbsa_gwdt_info);
 }
 
diff --git a/hw/watchdog/watchdog.c b/hw/watchdog/watchdog.c
index 1437e6c5b6..6c082a3263 100644
--- a/hw/watchdog/watchdog.c
+++ b/hw/watchdog/watchdog.c
@@ -32,49 +32,6 @@
 #include "qemu/help_option.h"
 
 static WatchdogAction watchdog_action = WATCHDOG_ACTION_RESET;
-static QLIST_HEAD(, WatchdogTimerModel) watchdog_list;
-
-void watchdog_add_model(WatchdogTimerModel *model)
-{
-    QLIST_INSERT_HEAD(&watchdog_list, model, entry);
-}
-
-/* Returns:
- *   0 = continue
- *   1 = exit program with error
- *   2 = exit program without error
- */
-int select_watchdog(const char *p)
-{
-    WatchdogTimerModel *model;
-    QemuOpts *opts;
-
-    /* -watchdog ? lists available devices and exits cleanly. */
-    if (is_help_option(p)) {
-        QLIST_FOREACH(model, &watchdog_list, entry) {
-            fprintf(stderr, "\t%s\t%s\n",
-                     model->wdt_name, model->wdt_description);
-        }
-        return 2;
-    }
-
-    QLIST_FOREACH(model, &watchdog_list, entry) {
-        if (strcasecmp(model->wdt_name, p) == 0) {
-            /* add the device */
-            opts = qemu_opts_create(qemu_find_opts("device"), NULL, 0,
-                                    &error_abort);
-            qemu_opt_set(opts, "driver", p, &error_abort);
-            return 0;
-        }
-    }
-
-    fprintf(stderr, "Unknown -watchdog device. Supported devices are:\n");
-    QLIST_FOREACH(model, &watchdog_list, entry) {
-        fprintf(stderr, "\t%s\t%s\n",
-                 model->wdt_name, model->wdt_description);
-    }
-    return 1;
-}
 
 WatchdogAction get_watchdog_action(void)
 {
diff --git a/hw/watchdog/wdt_aspeed.c b/hw/watchdog/wdt_aspeed.c
index 31855afdf4..d753693a2e 100644
--- a/hw/watchdog/wdt_aspeed.c
+++ b/hw/watchdog/wdt_aspeed.c
@@ -202,11 +202,6 @@ static void aspeed_wdt_write(void *opaque, hwaddr offset, uint64_t data,
     return;
 }
 
-static WatchdogTimerModel model = {
-    .wdt_name = TYPE_ASPEED_WDT,
-    .wdt_description = "Aspeed watchdog device",
-};
-
 static const VMStateDescription vmstate_aspeed_wdt = {
     .name = "vmstate_aspeed_wdt",
     .version_id = 0,
@@ -416,7 +411,6 @@ static const TypeInfo aspeed_1030_wdt_info = {
 
 static void wdt_aspeed_register_types(void)
 {
-    watchdog_add_model(&model);
     type_register_static(&aspeed_wdt_info);
     type_register_static(&aspeed_2400_wdt_info);
     type_register_static(&aspeed_2500_wdt_info);
diff --git a/hw/watchdog/wdt_diag288.c b/hw/watchdog/wdt_diag288.c
index 9e8882a11c..76d89fbf78 100644
--- a/hw/watchdog/wdt_diag288.c
+++ b/hw/watchdog/wdt_diag288.c
@@ -19,11 +19,6 @@
 #include "migration/vmstate.h"
 #include "qemu/log.h"
 
-static WatchdogTimerModel model = {
-    .wdt_name = TYPE_WDT_DIAG288,
-    .wdt_description = "diag288 device for s390x platform",
-};
-
 static const VMStateDescription vmstate_diag288 = {
     .name = "vmstate_diag288",
     .version_id = 0,
@@ -138,7 +133,6 @@ static const TypeInfo wdt_diag288_info = {
 
 static void wdt_diag288_register_types(void)
 {
-    watchdog_add_model(&model);
     type_register_static(&wdt_diag288_info);
 }
 
diff --git a/hw/watchdog/wdt_i6300esb.c b/hw/watchdog/wdt_i6300esb.c
index f99a1c9d29..5693ec6a09 100644
--- a/hw/watchdog/wdt_i6300esb.c
+++ b/hw/watchdog/wdt_i6300esb.c
@@ -457,11 +457,6 @@ static void i6300esb_exit(PCIDevice *dev)
     timer_free(d->timer);
 }
 
-static WatchdogTimerModel model = {
-    .wdt_name = "i6300esb",
-    .wdt_description = "Intel 6300ESB",
-};
-
 static void i6300esb_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -493,7 +488,6 @@ static const TypeInfo i6300esb_info = {
 
 static void i6300esb_register_types(void)
 {
-    watchdog_add_model(&model);
     type_register_static(&i6300esb_info);
 }
 
diff --git a/hw/watchdog/wdt_ib700.c b/hw/watchdog/wdt_ib700.c
index 91d1bdc0da..b116c3a3aa 100644
--- a/hw/watchdog/wdt_ib700.c
+++ b/hw/watchdog/wdt_ib700.c
@@ -128,11 +128,6 @@ static void wdt_ib700_reset(DeviceState *dev)
     timer_del(s->timer);
 }
 
-static WatchdogTimerModel model = {
-    .wdt_name = "ib700",
-    .wdt_description = "iBASE 700",
-};
-
 static void wdt_ib700_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -153,7 +148,6 @@ static const TypeInfo wdt_ib700_info = {
 
 static void wdt_ib700_register_types(void)
 {
-    watchdog_add_model(&model);
     type_register_static(&wdt_ib700_info);
 }
 
diff --git a/hw/watchdog/wdt_imx2.c b/hw/watchdog/wdt_imx2.c
index c3128370b5..e776a2fbd4 100644
--- a/hw/watchdog/wdt_imx2.c
+++ b/hw/watchdog/wdt_imx2.c
@@ -291,14 +291,8 @@ static const TypeInfo imx2_wdt_info = {
     .class_init    = imx2_wdt_class_init,
 };
 
-static WatchdogTimerModel model = {
-    .wdt_name = "imx2-watchdog",
-    .wdt_description = "i.MX2 Watchdog",
-};
-
 static void imx2_wdt_register_type(void)
 {
-    watchdog_add_model(&model);
     type_register_static(&imx2_wdt_info);
 }
 type_init(imx2_wdt_register_type)