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From cfb7a42b4241cf1a8dea0f33947c66671923f694 Mon Sep 17 00:00:00 2001
From: Markus Armbruster <armbru@redhat.com>
Date: Tue, 6 Aug 2013 13:17:05 +0200
Subject: [PATCH 12/28] Simplify -machine option queries with qemu_get_machine_opts()

RH-Author: Markus Armbruster <armbru@redhat.com>
Message-id: <1375795025-28674-7-git-send-email-armbru@redhat.com>
Patchwork-id: 52996
O-Subject: [PATCH 7.0 qemu-kvm 6/6] Simplify -machine option queries with qemu_get_machine_opts()
Bugzilla: 980782
RH-Acked-by: Laszlo Ersek <lersek@redhat.com>
RH-Acked-by: Michal Novotny <minovotn@redhat.com>
RH-Acked-by: Orit Wasserman <owasserm@redhat.com>

The previous two commits fixed bugs in -machine option queries.  I
can't find fault with the remaining queries, but let's use
qemu_get_machine_opts() everywhere, for consistency, simplicity and
robustness.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-id: 1372943363-24081-7-git-send-email-armbru@redhat.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
(cherry picked from commit 2ff3de685a875ece3ee21256736c0a9dbf39dc4c)
---
 device_tree.c  | 28 ++++++++++------------------
 exec.c         | 12 ++++--------
 hw/arm/boot.c  |  8 +-------
 hw/ppc/e500.c  | 12 +++---------
 hw/ppc/spapr.c | 28 ++++++++++------------------
 vl.c           | 22 ++++++----------------
 6 files changed, 34 insertions(+), 76 deletions(-)

Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
---
 device_tree.c  |   28 ++++++++++------------------
 exec.c         |   12 ++++--------
 hw/arm/boot.c  |    8 +-------
 hw/ppc/e500.c  |   12 +++---------
 hw/ppc/spapr.c |   28 ++++++++++------------------
 vl.c           |   22 ++++++----------------
 6 files changed, 34 insertions(+), 76 deletions(-)

diff --git a/device_tree.c b/device_tree.c
index 56af24b..77cbe04 100644
--- a/device_tree.c
+++ b/device_tree.c
@@ -21,6 +21,7 @@
 #include "config.h"
 #include "qemu-common.h"
 #include "sysemu/device_tree.h"
+#include "sysemu/sysemu.h"
 #include "hw/loader.h"
 #include "qemu/option.h"
 #include "qemu/config-file.h"
@@ -239,14 +240,10 @@ uint32_t qemu_devtree_alloc_phandle(void *fdt)
      * which phandle id to start allocting phandles.
      */
     if (!phandle) {
-        QemuOpts *machine_opts;
-        machine_opts = qemu_opts_find(qemu_find_opts("machine"), 0);
-        if (machine_opts) {
-            const char *phandle_start;
-            phandle_start = qemu_opt_get(machine_opts, "phandle_start");
-            if (phandle_start) {
-                phandle = strtoul(phandle_start, NULL, 0);
-            }
+        const char *phandle_start = qemu_opt_get(qemu_get_machine_opts(),
+                                                 "phandle_start");
+        if (phandle_start) {
+            phandle = strtoul(phandle_start, NULL, 0);
         }
     }
 
@@ -307,15 +304,10 @@ int qemu_devtree_add_subnode(void *fdt, const char *name)
 
 void qemu_devtree_dumpdtb(void *fdt, int size)
 {
-    QemuOpts *machine_opts;
-
-    machine_opts = qemu_opts_find(qemu_find_opts("machine"), 0);
-    if (machine_opts) {
-        const char *dumpdtb = qemu_opt_get(machine_opts, "dumpdtb");
-        if (dumpdtb) {
-            /* Dump the dtb to a file and quit */
-            exit(g_file_set_contents(dumpdtb, fdt, size, NULL) ? 0 : 1);
-        }
-    }
+    const char *dumpdtb = qemu_opt_get(qemu_get_machine_opts(), "dumpdtb");
 
+    if (dumpdtb) {
+        /* Dump the dtb to a file and quit */
+        exit(g_file_set_contents(dumpdtb, fdt, size, NULL) ? 0 : 1);
+    }
 }
diff --git a/exec.c b/exec.c
index aec65c5..ee22b9b 100644
--- a/exec.c
+++ b/exec.c
@@ -31,6 +31,7 @@
 #include "hw/qdev.h"
 #include "qemu/osdep.h"
 #include "sysemu/kvm.h"
+#include "sysemu/sysemu.h"
 #include "hw/xen/xen.h"
 #include "qemu/timer.h"
 #include "qemu/config-file.h"
@@ -979,12 +980,10 @@ ram_addr_t last_ram_offset(void)
 static void qemu_ram_setup_dump(void *addr, ram_addr_t size)
 {
     int ret;
-    QemuOpts *machine_opts;
 
     /* Use MADV_DONTDUMP, if user doesn't want the guest memory in the core */
-    machine_opts = qemu_opts_find(qemu_find_opts("machine"), 0);
-    if (machine_opts &&
-        !qemu_opt_get_bool(machine_opts, "dump-guest-core", true)) {
+    if (!qemu_opt_get_bool(qemu_get_machine_opts(),
+                           "dump-guest-core", true)) {
         ret = qemu_madvise(addr, size, QEMU_MADV_DONTDUMP);
         if (ret) {
             perror("qemu_madvise");
@@ -1031,10 +1030,7 @@ void qemu_ram_set_idstr(ram_addr_t addr, const char *name, DeviceState *dev)
 
 static int memory_try_enable_merging(void *addr, size_t len)
 {
-    QemuOpts *opts;
-
-    opts = qemu_opts_find(qemu_find_opts("machine"), 0);
-    if (opts && !qemu_opt_get_bool(opts, "mem-merge", true)) {
+    if (!qemu_opt_get_bool(qemu_get_machine_opts(), "mem-merge", true)) {
         /* disabled by the user */
         return 0;
     }
diff --git a/hw/arm/boot.c b/hw/arm/boot.c
index 6bffc3d..6436109 100644
--- a/hw/arm/boot.c
+++ b/hw/arm/boot.c
@@ -365,7 +365,6 @@ void arm_load_kernel(ARMCPU *cpu, struct arm_boot_info *info)
     uint64_t elf_entry;
     hwaddr entry;
     int big_endian;
-    QemuOpts *machine_opts;
 
     /* Load the kernel.  */
     if (!info->kernel_filename) {
@@ -373,12 +372,7 @@ void arm_load_kernel(ARMCPU *cpu, struct arm_boot_info *info)
         exit(1);
     }
 
-    machine_opts = qemu_opts_find(qemu_find_opts("machine"), 0);
-    if (machine_opts) {
-        info->dtb_filename = qemu_opt_get(machine_opts, "dtb");
-    } else {
-        info->dtb_filename = NULL;
-    }
+    info->dtb_filename = qemu_opt_get(qemu_get_machine_opts(), "dtb");
 
     if (!info->secondary_cpu_reset_hook) {
         info->secondary_cpu_reset_hook = default_reset_secondary;
diff --git a/hw/ppc/e500.c b/hw/ppc/e500.c
index c9ae512..ef3e571 100644
--- a/hw/ppc/e500.c
+++ b/hw/ppc/e500.c
@@ -137,7 +137,6 @@ static int ppce500_load_device_tree(CPUPPCState *env,
     uint32_t clock_freq = 400000000;
     uint32_t tb_freq = 400000000;
     int i;
-    const char *toplevel_compat = NULL; /* user override */
     char compatible_sb[] = "fsl,mpc8544-immr\0simple-bus";
     char soc[128];
     char mpic[128];
@@ -158,14 +157,9 @@ static int ppce500_load_device_tree(CPUPPCState *env,
             0x0, 0xe1000000,
             0x0, 0x10000,
         };
-    QemuOpts *machine_opts;
-    const char *dtb_file = NULL;
-
-    machine_opts = qemu_opts_find(qemu_find_opts("machine"), 0);
-    if (machine_opts) {
-        dtb_file = qemu_opt_get(machine_opts, "dtb");
-        toplevel_compat = qemu_opt_get(machine_opts, "dt_compatible");
-    }
+    QemuOpts *machine_opts = qemu_get_machine_opts();
+    const char *dtb_file = qemu_opt_get(machine_opts, "dtb");
+    const char *toplevel_compat = qemu_opt_get(machine_opts, "dt_compatible");
 
     if (dtb_file) {
         char *filename;
diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index c96ac81..6a46488 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -678,27 +678,19 @@ static void spapr_cpu_reset(void *opaque)
 
 static void spapr_create_nvram(sPAPREnvironment *spapr)
 {
-    QemuOpts *machine_opts;
-    DeviceState *dev;
+    DeviceState *dev = qdev_create(&spapr->vio_bus->bus, "spapr-nvram");
+    const char *drivename = qemu_opt_get(qemu_get_machine_opts(), "nvram");
 
-    dev = qdev_create(&spapr->vio_bus->bus, "spapr-nvram");
+    if (drivename) {
+        BlockDriverState *bs;
 
-    machine_opts = qemu_opts_find(qemu_find_opts("machine"), 0);
-    if (machine_opts) {
-        const char *drivename;
-
-        drivename = qemu_opt_get(machine_opts, "nvram");
-        if (drivename) {
-            BlockDriverState *bs;
-
-            bs = bdrv_find(drivename);
-            if (!bs) {
-                fprintf(stderr, "No such block device \"%s\" for nvram\n",
-                        drivename);
-                exit(1);
-            }
-            qdev_prop_set_drive_nofail(dev, "drive", bs);
+        bs = bdrv_find(drivename);
+        if (!bs) {
+            fprintf(stderr, "No such block device \"%s\" for nvram\n",
+                    drivename);
+            exit(1);
         }
+        qdev_prop_set_drive_nofail(dev, "drive", bs);
     }
 
     qdev_init_nofail(dev);
diff --git a/vl.c b/vl.c
index 0ed9257..d424af7 100644
--- a/vl.c
+++ b/vl.c
@@ -1037,15 +1037,9 @@ static int parse_sandbox(QemuOpts *opts, void *opaque)
     return 0;
 }
 
-/*********QEMU USB setting******/
 bool usb_enabled(bool default_usb)
 {
-    QemuOpts *mach_opts;
-    mach_opts = qemu_opts_find(qemu_find_opts("machine"), 0);
-    if (mach_opts) {
-        return qemu_opt_get_bool(mach_opts, "usb", default_usb);
-    }
-    return default_usb;
+    return qemu_opt_get_bool(qemu_get_machine_opts(), "usb", default_usb);
 }
 
 #ifndef _WIN32
@@ -4136,14 +4130,10 @@ int main(int argc, char **argv, char **envp)
         qtest_init();
     }
 
-    machine_opts = qemu_opts_find(qemu_find_opts("machine"), 0);
-    if (machine_opts) {
-        kernel_filename = qemu_opt_get(machine_opts, "kernel");
-        initrd_filename = qemu_opt_get(machine_opts, "initrd");
-        kernel_cmdline = qemu_opt_get(machine_opts, "append");
-    } else {
-        kernel_filename = initrd_filename = kernel_cmdline = NULL;
-    }
+    machine_opts = qemu_get_machine_opts();
+    kernel_filename = qemu_opt_get(machine_opts, "kernel");
+    initrd_filename = qemu_opt_get(machine_opts, "initrd");
+    kernel_cmdline = qemu_opt_get(machine_opts, "append");
 
     if (!kernel_cmdline) {
         kernel_cmdline = "";
@@ -4161,7 +4151,7 @@ int main(int argc, char **argv, char **envp)
         exit(1);
     }
 
-    if (!linux_boot && machine_opts && qemu_opt_get(machine_opts, "dtb")) {
+    if (!linux_boot && qemu_opt_get(machine_opts, "dtb")) {
         fprintf(stderr, "-dtb only allowed with -kernel option\n");
         exit(1);
     }
-- 
1.7.1