diff mbox

Sort the fw_cfg file list

Message ID 1458838119-6426-1-git-send-email-minyard@acm.org (mailing list archive)
State New, archived
Headers show

Commit Message

Corey Minyard March 24, 2016, 4:48 p.m. UTC
From: Gerd Hoffmann <kraxel@redhat.com>

Entries are inserted in filename order instead of being
appended to the end in case sorting is enabled.

This will avoid any future issues of moving the file creation
around, it doesn't matter what order they are created now,
the will always be in filename order.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

Added machine type handling for compatibility.  This was
a fairly complex change, this will preserve the order of fw_cfg
for older versions no matter what order the firmware files
actually come in.  A list is kept of the correct legacy order
and the entries will be inserted based upon their order in
the list.  Except that some entries are ordered (in a specific
area of the list) based upon what order they appear on the
command line.  Special handling is added for those entries.

Signed-off-by: Corey Minyard <cminyard@mvista.com>
---

Changes from v4:

 * Add a space in fw_cfg.h to improve readability.

 * Move the set order override for user file out of the main function
   in vl.c to parse_fw_cfg().  That way it has the fw_cfg and can
   call the fww_cfg_set_order_override() function directly.

 * Added a ROM I missed: genroms/kvmvapic.bin.  I looked around
   some more and I couldn't find anything else.

I'm not sure who should merge this.

 hw/core/loader.c          |  10 ++++
 hw/i386/pc.c              |   4 ++
 hw/i386/pc_piix.c         |   1 +
 hw/i386/pc_q35.c          |   1 +
 hw/nvram/fw_cfg.c         | 131 +++++++++++++++++++++++++++++++++++++++++++---
 include/hw/boards.h       |   3 +-
 include/hw/loader.h       |   2 +
 include/hw/nvram/fw_cfg.h |   8 +++
 vl.c                      |  10 +++-
 9 files changed, 159 insertions(+), 11 deletions(-)
diff mbox

Patch

diff --git a/hw/core/loader.c b/hw/core/loader.c
index 8e8031c..8a3d518 100644
--- a/hw/core/loader.c
+++ b/hw/core/loader.c
@@ -1051,6 +1051,16 @@  void rom_set_fw(FWCfgState *f)
     fw_cfg = f;
 }
 
+void rom_set_order_override(int order)
+{
+    fw_cfg_set_order_override(fw_cfg, order);
+}
+
+void rom_reset_order_override(void)
+{
+    fw_cfg_reset_order_override(fw_cfg);
+}
+
 static Rom *find_rom(hwaddr addr)
 {
     Rom *rom;
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 56ec6cd..aa3f4f3 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -1406,6 +1406,7 @@  DeviceState *pc_vga_init(ISABus *isa_bus, PCIBus *pci_bus)
 {
     DeviceState *dev = NULL;
 
+    rom_set_order_override(FW_CFG_ORDER_OVERRIDE_VGA);
     if (pci_bus) {
         PCIDevice *pcidev = pci_vga_init(pci_bus);
         dev = pcidev ? &pcidev->qdev : NULL;
@@ -1413,6 +1414,7 @@  DeviceState *pc_vga_init(ISABus *isa_bus, PCIBus *pci_bus)
         ISADevice *isadev = isa_vga_init(isa_bus);
         dev = isadev ? DEVICE(isadev) : NULL;
     }
+    rom_reset_order_override();
     return dev;
 }
 
@@ -1541,6 +1543,7 @@  void pc_nic_init(ISABus *isa_bus, PCIBus *pci_bus)
 {
     int i;
 
+    rom_set_order_override(FW_CFG_ORDER_OVERRIDE_NIC);
     for (i = 0; i < nb_nics; i++) {
         NICInfo *nd = &nd_table[i];
 
@@ -1550,6 +1553,7 @@  void pc_nic_init(ISABus *isa_bus, PCIBus *pci_bus)
             pci_nic_init_nofail(nd, pci_bus, "e1000", NULL);
         }
     }
+    rom_reset_order_override();
 }
 
 void pc_pci_device_init(PCIBus *pci_bus)
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index 6f8c2cd..447703b 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -429,6 +429,7 @@  static void pc_i440fx_2_5_machine_options(MachineClass *m)
     m->alias = NULL;
     m->is_default = 0;
     pcmc->save_tsc_khz = false;
+    m->legacy_fw_cfg_order = 1;
     SET_MACHINE_COMPAT(m, PC_COMPAT_2_5);
 }
 
diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
index 46522c9..04f3609 100644
--- a/hw/i386/pc_q35.c
+++ b/hw/i386/pc_q35.c
@@ -291,6 +291,7 @@  static void pc_q35_2_5_machine_options(MachineClass *m)
     pc_q35_2_6_machine_options(m);
     m->alias = NULL;
     pcmc->save_tsc_khz = false;
+    m->legacy_fw_cfg_order = 1;
     SET_MACHINE_COMPAT(m, PC_COMPAT_2_5);
 }
 
diff --git a/hw/nvram/fw_cfg.c b/hw/nvram/fw_cfg.c
index 7866248..a58efe4 100644
--- a/hw/nvram/fw_cfg.c
+++ b/hw/nvram/fw_cfg.c
@@ -28,6 +28,7 @@ 
 #include "hw/isa/isa.h"
 #include "hw/nvram/fw_cfg.h"
 #include "hw/sysbus.h"
+#include "hw/boards.h"
 #include "trace.h"
 #include "qemu/error-report.h"
 #include "qemu/config-file.h"
@@ -68,11 +69,14 @@  struct FWCfgState {
     /*< public >*/
 
     FWCfgEntry entries[2][FW_CFG_MAX_ENTRY];
+    int entry_order[FW_CFG_MAX_ENTRY];
     FWCfgFiles *files;
     uint16_t cur_entry;
     uint32_t cur_offset;
     Notifier machine_ready;
 
+    int fw_cfg_order_override;
+
     bool dma_enabled;
     dma_addr_t dma_addr;
     AddressSpace *dma_as;
@@ -664,12 +668,87 @@  void fw_cfg_add_i64(FWCfgState *s, uint16_t key, uint64_t value)
     fw_cfg_add_bytes(s, key, copy, sizeof(value));
 }
 
+void fw_cfg_set_order_override(FWCfgState *s, int order)
+{
+    assert(s->fw_cfg_order_override == 0);
+    s->fw_cfg_order_override = order;
+}
+
+void fw_cfg_reset_order_override(FWCfgState *s)
+{
+    assert(s->fw_cfg_order_override != 0);
+    s->fw_cfg_order_override = 0;
+}
+
+/*
+ * This is the legacy order list.  For legacy systems, files are in
+ * the fw_cfg in the order defined below, by the "order" value.  Note
+ * that some entries (VGA ROMs, NIC option ROMS, etc.) go into a
+ * specific area, but there may be more than one and they occur in the
+ * order that the user specifies them on the command line.  Those are
+ * handled in a special manner, using the order override above.
+ *
+ * For non-legacy, the files are sorted by filename to avoid this kind
+ * of complexity in the future.
+ *
+ * This is only for x86, other arches don't implement versioning so
+ * they won't set legacy mode.
+ */
+static struct {
+    const char *name;
+    int order;
+} fw_cfg_order[] = {
+    { "etc/boot-menu-wait", 10 },
+    { "bootsplash.jpg", 11 },
+    { "bootsplash.bmp", 12 },
+    { "etc/boot-fail-wait", 15 },
+    { "etc/smbios/smbios-tables", 20 },
+    { "etc/smbios/smbios-anchor", 30 },
+    { "etc/e820", 40 },
+    { "etc/reserved-memory-end", 50 },
+    { "genroms/kvmvapic.bin", 55 },
+    { "genroms/linuxboot.bin", 60 },
+    { }, /* VGA ROMs from pc_vga_init come here, 70. */
+    { }, /* NIC option ROMs from pc_nic_init come here, 80. */
+    { "etc/system-states", 90 },
+    { }, /* User ROMs come here, 100. */
+    { }, /* Device FW comes here, 110. */
+    { "etc/extra-pci-roots", 120 },
+    { "etc/acpi/tables", 130 },
+    { "etc/table-loader", 140 },
+    { "etc/tpm/log", 150 },
+    { "etc/acpi/rsdp", 160 },
+    { "bootorder", 170 },
+
+#define FW_CFG_ORDER_OVERRIDE_LAST 200
+};
+
+static int get_fw_cfg_order(FWCfgState *s, const char *name)
+{
+    int i;
+
+    if (s->fw_cfg_order_override > 0)
+	return s->fw_cfg_order_override;
+
+    for (i = 0; i < ARRAY_SIZE(fw_cfg_order); i++) {
+	if (fw_cfg_order[i].name == NULL)
+	    continue;
+	if (strcmp(name, fw_cfg_order[i].name) == 0)
+	    return fw_cfg_order[i].order;
+    }
+    /* Stick unknown stuff at the end. */
+    error_report("warning: Unknown firmware file in legacy mode: %s\n", name);
+    return FW_CFG_ORDER_OVERRIDE_LAST;
+}
+
 void fw_cfg_add_file_callback(FWCfgState *s,  const char *filename,
                               FWCfgReadCallback callback, void *callback_opaque,
                               void *data, size_t len)
 {
-    int i, index;
+    int i, index, count;
     size_t dsize;
+    MachineClass *mc = MACHINE_GET_CLASS(qdev_get_machine());
+    int order = 0;
 
     if (!s->files) {
         dsize = sizeof(uint32_t) + sizeof(FWCfgFile) * FW_CFG_FILE_SLOTS;
@@ -677,13 +756,48 @@  void fw_cfg_add_file_callback(FWCfgState *s,  const char *filename,
         fw_cfg_add_bytes(s, FW_CFG_FILE_DIR, s->files, dsize);
     }
 
-    index = be32_to_cpu(s->files->count);
-    assert(index < FW_CFG_FILE_SLOTS);
+    count = be32_to_cpu(s->files->count);
+    assert(count < FW_CFG_FILE_SLOTS);
 
-    pstrcpy(s->files->f[index].name, sizeof(s->files->f[index].name),
-            filename);
-    for (i = 0; i < index; i++) {
-        if (strcmp(s->files->f[index].name, s->files->f[i].name) == 0) {
+    /* Find the insertion point. */
+    if (mc->legacy_fw_cfg_order) {
+        /*
+         * Sort by order. For files with the same order, we keep them
+         * in the sequence in which they were added.
+         */
+        order = get_fw_cfg_order(s, filename);
+        for (index = count;
+             index > 0 && order < s->entry_order[index - 1];
+             index--);
+    } else {
+        /* Sort by file name. */
+        for (index = count;
+             index > 0 && strcmp(filename, s->files->f[index - 1].name) < 0;
+             index--);
+    }
+
+    /*
+     * Move all the entries from the index point and after down one
+     * to create a slot for the new entry.  Because calculations are
+     * being done with the index, make it so that "i" is the current
+     * index and "i - 1" is the one being copied from, thus the
+     * unusual start and end in the for statement.
+     */
+    for (i = count + 1; i > index; i--) {
+        s->files->f[i] = s->files->f[i - 1];
+        s->files->f[i].select = cpu_to_be16(FW_CFG_FILE_FIRST + i);
+        s->entries[0][FW_CFG_FILE_FIRST + i] =
+            s->entries[0][FW_CFG_FILE_FIRST + i - 1];
+        s->entry_order[i] = s->entry_order[i - 1];
+    }
+
+    memset(&s->files->f[index], 0, sizeof(FWCfgFile));
+    memset(&s->entries[0][FW_CFG_FILE_FIRST + index], 0, sizeof(FWCfgEntry));
+
+    pstrcpy(s->files->f[index].name, sizeof(s->files->f[index].name), filename);
+    for (i = 0; i <= count; i++) {
+        if (i != index &&
+            strcmp(s->files->f[index].name, s->files->f[i].name) == 0) {
             error_report("duplicate fw_cfg file name: %s",
                          s->files->f[index].name);
             exit(1);
@@ -695,9 +809,10 @@  void fw_cfg_add_file_callback(FWCfgState *s,  const char *filename,
 
     s->files->f[index].size   = cpu_to_be32(len);
     s->files->f[index].select = cpu_to_be16(FW_CFG_FILE_FIRST + index);
+    s->entry_order[index] = order;
     trace_fw_cfg_add_file(s, index, s->files->f[index].name, len);
 
-    s->files->count = cpu_to_be32(index+1);
+    s->files->count = cpu_to_be32(count+1);
 }
 
 void fw_cfg_add_file(FWCfgState *s,  const char *filename,
diff --git a/include/hw/boards.h b/include/hw/boards.h
index b5d7eae..b6567f7 100644
--- a/include/hw/boards.h
+++ b/include/hw/boards.h
@@ -84,7 +84,8 @@  struct MachineClass {
         no_cdrom:1,
         no_sdcard:1,
         has_dynamic_sysbus:1,
-        pci_allow_0_address:1;
+        pci_allow_0_address:1,
+        legacy_fw_cfg_order:1;
     int is_default;
     const char *default_machine_opts;
     const char *default_boot_order;
diff --git a/include/hw/loader.h b/include/hw/loader.h
index 0ba7808..e0fd5e8 100644
--- a/include/hw/loader.h
+++ b/include/hw/loader.h
@@ -128,6 +128,8 @@  int rom_add_elf_program(const char *name, void *data, size_t datasize,
                         size_t romsize, hwaddr addr);
 int rom_check_and_register_reset(void);
 void rom_set_fw(FWCfgState *f);
+void rom_set_order_override(int order);
+void rom_reset_order_override(void);
 int rom_copy(uint8_t *dest, hwaddr addr, size_t size);
 void *rom_ptr(hwaddr addr);
 void hmp_info_roms(Monitor *mon, const QDict *qdict);
diff --git a/include/hw/nvram/fw_cfg.h b/include/hw/nvram/fw_cfg.h
index 4315f4e..d56c969 100644
--- a/include/hw/nvram/fw_cfg.h
+++ b/include/hw/nvram/fw_cfg.h
@@ -57,6 +57,14 @@  typedef struct FWCfgFile {
     char      name[FW_CFG_MAX_FILE_PATH];
 } FWCfgFile;
 
+#define FW_CFG_ORDER_OVERRIDE_VGA    70
+#define FW_CFG_ORDER_OVERRIDE_NIC    80
+#define FW_CFG_ORDER_OVERRIDE_USER   100
+#define FW_CFG_ORDER_OVERRIDE_DEVICE 110
+
+void fw_cfg_set_order_override(FWCfgState *fw_cfg, int order);
+void fw_cfg_reset_order_override(FWCfgState *fw_cfg);
+
 typedef struct FWCfgFiles {
     uint32_t  count;
     FWCfgFile f[];
diff --git a/vl.c b/vl.c
index 7a28982..736d3e7 100644
--- a/vl.c
+++ b/vl.c
@@ -2296,8 +2296,9 @@  static int parse_fw_cfg(void *opaque, QemuOpts *opts, Error **errp)
     gchar *buf;
     size_t size;
     const char *name, *file, *str;
+    FWCfgState *fw_cfg = (FWCfgState *) opaque;
 
-    if (opaque == NULL) {
+    if (fw_cfg == NULL) {
         error_report("fw_cfg device not available");
         return -1;
     }
@@ -2331,7 +2332,10 @@  static int parse_fw_cfg(void *opaque, QemuOpts *opts, Error **errp)
             return -1;
         }
     }
-    fw_cfg_add_file((FWCfgState *)opaque, name, buf, size);
+    /* For legacy, keep user files in a specific global order. */
+    fw_cfg_set_order_override(fw_cfg, FW_CFG_ORDER_OVERRIDE_USER);
+    fw_cfg_add_file(fw_cfg, name, buf, size);
+    fw_cfg_reset_order_override(fw_cfg);
     return 0;
 }
 
@@ -4535,10 +4539,12 @@  int main(int argc, char **argv, char **envp)
     igd_gfx_passthru();
 
     /* init generic devices */
+    rom_set_order_override(FW_CFG_ORDER_OVERRIDE_DEVICE);
     if (qemu_opts_foreach(qemu_find_opts("device"),
                           device_init_func, NULL, NULL)) {
         exit(1);
     }
+    rom_reset_order_override();
 
     /* Did we create any drives that we failed to create a device for? */
     drive_check_orphaned();