[Qemu-devel] [QEMU] [PATCH 0/8] Add Qemu to SeaBIOS LCHS interface

[Qemu-devel] [QEMU] [PATCH 0/8] Add Qemu to SeaBIOS LCHS interface

[Sam Eiderman]

Non-standard logical geometries break under QEMU.

A virtual disk which contains an operating system which depends on
logical geometries (consistent values being reported from BIOS INT13
AH=08) will most likely break under QEMU/SeaBIOS if it has non-standard
logical geometries - for example 56 SPT (sectors per track).
No matter what QEMU will guess - SeaBIOS, for large enough disks - will
use LBA translation, which will report 63 SPT instead.

In addition we can not enforce SeaBIOS to rely on phyiscal geometries at
all. A virtio-blk-pci virtual disk with 255 phyiscal heads can not
report more than 16 physical heads when moved to an IDE controller, the
ATA spec allows a maximum of 16 heads - this is an artifact of
virtualization.

By supplying the logical geometies directly we are able to support such
"exotic" disks.

We will use fw_cfg to do just that.

Sam Eiderman (8):
  block: Refactor macros - fix tabbing
  block: Support providing LCHS from user
  bootdevice: Add interface to gather LCHS
  scsi: Propagate unrealize() callback to scsi-hd
  bootdevice: Gather LCHS from all relevant devices
  bootdevice: Refactor get_boot_devices_list
  bootdevice: FW_CFG interface for LCHS values
  hd-geo-test: Add tests for lchs override

 bootdevice.c             | 158 ++++++++++---
 hw/block/virtio-blk.c    |   6 +
 hw/ide/qdev.c            |   7 +-
 hw/nvram/fw_cfg.c        |  14 +-
 hw/scsi/scsi-bus.c       |  15 ++
 hw/scsi/scsi-disk.c      |  14 ++
 include/hw/block/block.h |  22 +-
 include/hw/scsi/scsi.h   |   1 +
 include/sysemu/sysemu.h  |   4 +
 tests/Makefile.include   |   2 +-
 tests/hd-geo-test.c      | 565 +++++++++++++++++++++++++++++++++++++++++++++++
 11 files changed, 767 insertions(+), 41 deletions(-)

-- 
2.13.3

[Qemu-devel] [QEMU] [PATCH 1/8] block: Refactor macros - fix tabbing

[Sam Eiderman]

Fixing tabbing in block related macros.

Reviewed-by: Karl Heubaum <karl.heubaum@oracle.com>
Reviewed-by: Arbel Moshe <arbel.moshe@oracle.com>
Signed-off-by: Sam Eiderman <shmuel.eiderman@oracle.com>
---
 hw/ide/qdev.c            |  2 +-
 include/hw/block/block.h | 16 ++++++++--------
 2 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/hw/ide/qdev.c b/hw/ide/qdev.c
index 360cd20bd8..9cae3205df 100644
--- a/hw/ide/qdev.c
+++ b/hw/ide/qdev.c
@@ -285,7 +285,7 @@ static void ide_drive_realize(IDEDevice *dev, Error **errp)
     DEFINE_BLOCK_PROPERTIES(IDEDrive, dev.conf),        \
     DEFINE_BLOCK_ERROR_PROPERTIES(IDEDrive, dev.conf),  \
     DEFINE_PROP_STRING("ver",  IDEDrive, dev.version),  \
-    DEFINE_PROP_UINT64("wwn",  IDEDrive, dev.wwn, 0),    \
+    DEFINE_PROP_UINT64("wwn",  IDEDrive, dev.wwn, 0),   \
     DEFINE_PROP_STRING("serial",  IDEDrive, dev.serial),\
     DEFINE_PROP_STRING("model", IDEDrive, dev.model)
 
diff --git a/include/hw/block/block.h b/include/hw/block/block.h
index 607539057a..fd55a30bca 100644
--- a/include/hw/block/block.h
+++ b/include/hw/block/block.h
@@ -50,21 +50,21 @@ static inline unsigned int get_physical_block_exp(BlockConf *conf)
                           _conf.logical_block_size),                    \
     DEFINE_PROP_BLOCKSIZE("physical_block_size", _state,                \
                           _conf.physical_block_size),                   \
-    DEFINE_PROP_UINT16("min_io_size", _state, _conf.min_io_size, 0),  \
+    DEFINE_PROP_UINT16("min_io_size", _state, _conf.min_io_size, 0),    \
     DEFINE_PROP_UINT32("opt_io_size", _state, _conf.opt_io_size, 0),    \
-    DEFINE_PROP_UINT32("discard_granularity", _state, \
-                       _conf.discard_granularity, -1), \
-    DEFINE_PROP_ON_OFF_AUTO("write-cache", _state, _conf.wce, \
-                            ON_OFF_AUTO_AUTO), \
+    DEFINE_PROP_UINT32("discard_granularity", _state,                   \
+                       _conf.discard_granularity, -1),                  \
+    DEFINE_PROP_ON_OFF_AUTO("write-cache", _state, _conf.wce,           \
+                            ON_OFF_AUTO_AUTO),                          \
     DEFINE_PROP_BOOL("share-rw", _state, _conf.share_rw, false)
 
 #define DEFINE_BLOCK_PROPERTIES(_state, _conf)                          \
     DEFINE_PROP_DRIVE("drive", _state, _conf.blk),                      \
     DEFINE_BLOCK_PROPERTIES_BASE(_state, _conf)
 
-#define DEFINE_BLOCK_CHS_PROPERTIES(_state, _conf)      \
-    DEFINE_PROP_UINT32("cyls", _state, _conf.cyls, 0),  \
-    DEFINE_PROP_UINT32("heads", _state, _conf.heads, 0), \
+#define DEFINE_BLOCK_CHS_PROPERTIES(_state, _conf)                      \
+    DEFINE_PROP_UINT32("cyls", _state, _conf.cyls, 0),                  \
+    DEFINE_PROP_UINT32("heads", _state, _conf.heads, 0),                \
     DEFINE_PROP_UINT32("secs", _state, _conf.secs, 0)
 
 #define DEFINE_BLOCK_ERROR_PROPERTIES(_state, _conf)                    \
-- 
2.13.3

[Qemu-devel] [QEMU] [PATCH 2/8] block: Support providing LCHS from user

[Sam Eiderman]

Add logical geometry variables to BlockConf.

A user can now supply "lcyls", "lheads" & "lsecs" for any HD device
that supports CHS ("cyls", "heads", "secs").

These devices include:
    * ide-hd
    * scsi-hd
    * virtio-blk-pci

In future commits we will use the provided LCHS and pass it to the BIOS
through fw_cfg to be supplied using INT13 routines.

Reviewed-by: Karl Heubaum <karl.heubaum@oracle.com>
Reviewed-by: Arbel Moshe <arbel.moshe@oracle.com>
Signed-off-by: Sam Eiderman <shmuel.eiderman@oracle.com>
---
 include/hw/block/block.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/include/hw/block/block.h b/include/hw/block/block.h
index fd55a30bca..d7246f3862 100644
--- a/include/hw/block/block.h
+++ b/include/hw/block/block.h
@@ -26,6 +26,7 @@ typedef struct BlockConf {
     uint32_t discard_granularity;
     /* geometry, not all devices use this */
     uint32_t cyls, heads, secs;
+    uint32_t lcyls, lheads, lsecs;
     OnOffAuto wce;
     bool share_rw;
     BlockdevOnError rerror;
@@ -65,7 +66,10 @@ static inline unsigned int get_physical_block_exp(BlockConf *conf)
 #define DEFINE_BLOCK_CHS_PROPERTIES(_state, _conf)                      \
     DEFINE_PROP_UINT32("cyls", _state, _conf.cyls, 0),                  \
     DEFINE_PROP_UINT32("heads", _state, _conf.heads, 0),                \
-    DEFINE_PROP_UINT32("secs", _state, _conf.secs, 0)
+    DEFINE_PROP_UINT32("secs", _state, _conf.secs, 0),                  \
+    DEFINE_PROP_UINT32("lcyls", _state, _conf.lcyls, 0),                \
+    DEFINE_PROP_UINT32("lheads", _state, _conf.lheads, 0),              \
+    DEFINE_PROP_UINT32("lsecs", _state, _conf.lsecs, 0)
 
 #define DEFINE_BLOCK_ERROR_PROPERTIES(_state, _conf)                    \
     DEFINE_PROP_BLOCKDEV_ON_ERROR("rerror", _state, _conf.rerror,       \
-- 
2.13.3

[Qemu-devel] [QEMU] [PATCH 3/8] bootdevice: Add interface to gather LCHS

[Sam Eiderman]

Add an interface to provide direct logical CHS values for boot devices.
We will use this interface in the next commits.

Reviewed-by: Karl Heubaum <karl.heubaum@oracle.com>
Reviewed-by: Arbel Moshe <arbel.moshe@oracle.com>
Signed-off-by: Sam Eiderman <shmuel.eiderman@oracle.com>
---
 bootdevice.c            | 55 +++++++++++++++++++++++++++++++++++++++++++++++++
 include/sysemu/sysemu.h |  3 +++
 2 files changed, 58 insertions(+)

diff --git a/bootdevice.c b/bootdevice.c
index 1d225202f9..bc5e1c2de4 100644
--- a/bootdevice.c
+++ b/bootdevice.c
@@ -343,3 +343,58 @@ void device_add_bootindex_property(Object *obj, int32_t *bootindex,
     /* initialize devices' bootindex property to -1 */
     object_property_set_int(obj, -1, name, NULL);
 }
+
+typedef struct FWLCHSEntry FWLCHSEntry;
+
+struct FWLCHSEntry {
+    QTAILQ_ENTRY(FWLCHSEntry) link;
+    DeviceState *dev;
+    char *suffix;
+    uint32_t lcyls;
+    uint32_t lheads;
+    uint32_t lsecs;
+};
+
+static QTAILQ_HEAD(, FWLCHSEntry) fw_lchs =
+    QTAILQ_HEAD_INITIALIZER(fw_lchs);
+
+void add_boot_device_lchs(DeviceState *dev, const char *suffix,
+                          uint32_t lcyls, uint32_t lheads, uint32_t lsecs)
+{
+    FWLCHSEntry *node;
+
+    if (!lcyls && !lheads && !lsecs) {
+        return;
+    }
+
+    assert(dev != NULL || suffix != NULL);
+
+    node = g_malloc0(sizeof(FWLCHSEntry));
+    node->suffix = g_strdup(suffix);
+    node->dev = dev;
+    node->lcyls = lcyls;
+    node->lheads = lheads;
+    node->lsecs = lsecs;
+
+    QTAILQ_INSERT_TAIL(&fw_lchs, node, link);
+}
+
+void del_boot_device_lchs(DeviceState *dev, const char *suffix)
+{
+    FWLCHSEntry *i;
+
+    if (dev == NULL) {
+        return;
+    }
+
+    QTAILQ_FOREACH(i, &fw_lchs, link) {
+        if ((!suffix || !g_strcmp0(i->suffix, suffix)) &&
+             i->dev == dev) {
+            QTAILQ_REMOVE(&fw_lchs, i, link);
+            g_free(i->suffix);
+            g_free(i);
+
+            break;
+        }
+    }
+}
diff --git a/include/sysemu/sysemu.h b/include/sysemu/sysemu.h
index 61579ae71e..173dfbb539 100644
--- a/include/sysemu/sysemu.h
+++ b/include/sysemu/sysemu.h
@@ -171,6 +171,9 @@ void device_add_bootindex_property(Object *obj, int32_t *bootindex,
                                    DeviceState *dev, Error **errp);
 void restore_boot_order(void *opaque);
 void validate_bootdevices(const char *devices, Error **errp);
+void add_boot_device_lchs(DeviceState *dev, const char *suffix,
+                          uint32_t lcyls, uint32_t lheads, uint32_t lsecs);
+void del_boot_device_lchs(DeviceState *dev, const char *suffix);
 
 /* handler to set the boot_device order for a specific type of MachineClass */
 typedef void QEMUBootSetHandler(void *opaque, const char *boot_order,
-- 
2.13.3

[Qemu-devel] [QEMU] [PATCH 4/8] scsi: Propagate unrealize() callback to scsi-hd

[Sam Eiderman]

We will need to add LCHS removal logic to scsi-hd's unrealize() in the
next commit.

Reviewed-by: Karl Heubaum <karl.heubaum@oracle.com>
Reviewed-by: Arbel Moshe <arbel.moshe@oracle.com>
Signed-off-by: Sam Eiderman <shmuel.eiderman@oracle.com>
---
 hw/scsi/scsi-bus.c     | 15 +++++++++++++++
 include/hw/scsi/scsi.h |  1 +
 2 files changed, 16 insertions(+)

diff --git a/hw/scsi/scsi-bus.c b/hw/scsi/scsi-bus.c
index c480553083..f6fe497a1a 100644
--- a/hw/scsi/scsi-bus.c
+++ b/hw/scsi/scsi-bus.c
@@ -55,6 +55,14 @@ static void scsi_device_realize(SCSIDevice *s, Error **errp)
     }
 }
 
+static void scsi_device_unrealize(SCSIDevice *s, Error **errp)
+{
+    SCSIDeviceClass *sc = SCSI_DEVICE_GET_CLASS(s);
+    if (sc->unrealize) {
+        sc->unrealize(s, errp);
+    }
+}
+
 int scsi_bus_parse_cdb(SCSIDevice *dev, SCSICommand *cmd, uint8_t *buf,
                        void *hba_private)
 {
@@ -213,11 +221,18 @@ static void scsi_qdev_realize(DeviceState *qdev, Error **errp)
 static void scsi_qdev_unrealize(DeviceState *qdev, Error **errp)
 {
     SCSIDevice *dev = SCSI_DEVICE(qdev);
+    Error *local_err = NULL;
 
     if (dev->vmsentry) {
         qemu_del_vm_change_state_handler(dev->vmsentry);
     }
 
+    scsi_device_unrealize(dev, &local_err);
+    if (local_err) {
+        error_propagate(errp, local_err);
+        return;
+    }
+
     scsi_device_purge_requests(dev, SENSE_CODE(NO_SENSE));
     blockdev_mark_auto_del(dev->conf.blk);
 }
diff --git a/include/hw/scsi/scsi.h b/include/hw/scsi/scsi.h
index 426566a5c6..8cf71f910d 100644
--- a/include/hw/scsi/scsi.h
+++ b/include/hw/scsi/scsi.h
@@ -59,6 +59,7 @@ struct SCSIRequest {
 typedef struct SCSIDeviceClass {
     DeviceClass parent_class;
     void (*realize)(SCSIDevice *dev, Error **errp);
+    void (*unrealize)(SCSIDevice *dev, Error **errp);
     int (*parse_cdb)(SCSIDevice *dev, SCSICommand *cmd, uint8_t *buf,
                      void *hba_private);
     SCSIRequest *(*alloc_req)(SCSIDevice *s, uint32_t tag, uint32_t lun,
-- 
2.13.3

[Qemu-devel] [QEMU] [PATCH 5/8] bootdevice: Gather LCHS from all relevant devices

[Sam Eiderman]

Relevant devices are:
    * ide-hd (and ide-cd, ide-drive)
    * scsi-hd (and scsi-cd, scsi-disk, scsi-block)
    * virtio-blk-pci

We do not call del_boot_device_lchs() for ide-* since we don't need to -
IDE block devices do not support unplugging.

Reviewed-by: Karl Heubaum <karl.heubaum@oracle.com>
Reviewed-by: Arbel Moshe <arbel.moshe@oracle.com>
Signed-off-by: Sam Eiderman <shmuel.eiderman@oracle.com>
---
 hw/block/virtio-blk.c |  6 ++++++
 hw/ide/qdev.c         |  5 +++++
 hw/scsi/scsi-disk.c   | 14 ++++++++++++++
 3 files changed, 25 insertions(+)

diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c
index 06e57a4d39..787bbd768a 100644
--- a/hw/block/virtio-blk.c
+++ b/hw/block/virtio-blk.c
@@ -1182,6 +1182,11 @@ static void virtio_blk_device_realize(DeviceState *dev, Error **errp)
     blk_set_guest_block_size(s->blk, s->conf.conf.logical_block_size);
 
     blk_iostatus_enable(s->blk);
+
+    add_boot_device_lchs(dev, "/disk@0,0",
+                         (&conf->conf)->lcyls,
+                         (&conf->conf)->lheads,
+                         (&conf->conf)->lsecs);
 }
 
 static void virtio_blk_device_unrealize(DeviceState *dev, Error **errp)
@@ -1189,6 +1194,7 @@ static void virtio_blk_device_unrealize(DeviceState *dev, Error **errp)
     VirtIODevice *vdev = VIRTIO_DEVICE(dev);
     VirtIOBlock *s = VIRTIO_BLK(dev);
 
+    del_boot_device_lchs(dev, "/disk@0,0");
     virtio_blk_data_plane_destroy(s->dataplane);
     s->dataplane = NULL;
     qemu_del_vm_change_state_handler(s->change);
diff --git a/hw/ide/qdev.c b/hw/ide/qdev.c
index 9cae3205df..07f429d5e3 100644
--- a/hw/ide/qdev.c
+++ b/hw/ide/qdev.c
@@ -215,6 +215,11 @@ static void ide_dev_initfn(IDEDevice *dev, IDEDriveKind kind, Error **errp)
 
     add_boot_device_path(dev->conf.bootindex, &dev->qdev,
                          dev->unit ? "/disk@1" : "/disk@0");
+
+    add_boot_device_lchs(&dev->qdev, dev->unit ? "/disk@1" : "/disk@0",
+                         (&dev->conf)->lcyls,
+                         (&dev->conf)->lheads,
+                         (&dev->conf)->lsecs);
 }
 
 static void ide_dev_get_bootindex(Object *obj, Visitor *v, const char *name,
diff --git a/hw/scsi/scsi-disk.c b/hw/scsi/scsi-disk.c
index 7b89ac798b..3451aefdea 100644
--- a/hw/scsi/scsi-disk.c
+++ b/hw/scsi/scsi-disk.c
@@ -2390,6 +2390,16 @@ static void scsi_realize(SCSIDevice *dev, Error **errp)
     blk_set_guest_block_size(s->qdev.conf.blk, s->qdev.blocksize);
 
     blk_iostatus_enable(s->qdev.conf.blk);
+
+    add_boot_device_lchs(&dev->qdev, NULL,
+                         (&dev->conf)->lcyls,
+                         (&dev->conf)->lheads,
+                         (&dev->conf)->lsecs);
+}
+
+static void scsi_unrealize(SCSIDevice *dev, Error **errp)
+{
+    del_boot_device_lchs(&dev->qdev, NULL);
 }
 
 static void scsi_hd_realize(SCSIDevice *dev, Error **errp)
@@ -2988,6 +2998,7 @@ static void scsi_hd_class_initfn(ObjectClass *klass, void *data)
     SCSIDeviceClass *sc = SCSI_DEVICE_CLASS(klass);
 
     sc->realize      = scsi_hd_realize;
+    sc->unrealize    = scsi_unrealize;
     sc->alloc_req    = scsi_new_request;
     sc->unit_attention_reported = scsi_disk_unit_attention_reported;
     dc->desc = "virtual SCSI disk";
@@ -3019,6 +3030,7 @@ static void scsi_cd_class_initfn(ObjectClass *klass, void *data)
     SCSIDeviceClass *sc = SCSI_DEVICE_CLASS(klass);
 
     sc->realize      = scsi_cd_realize;
+    sc->unrealize    = scsi_unrealize;
     sc->alloc_req    = scsi_new_request;
     sc->unit_attention_reported = scsi_disk_unit_attention_reported;
     dc->desc = "virtual SCSI CD-ROM";
@@ -3054,6 +3066,7 @@ static void scsi_block_class_initfn(ObjectClass *klass, void *data)
     SCSIDiskClass *sdc = SCSI_DISK_BASE_CLASS(klass);
 
     sc->realize      = scsi_block_realize;
+    sc->unrealize    = scsi_unrealize;
     sc->alloc_req    = scsi_block_new_request;
     sc->parse_cdb    = scsi_block_parse_cdb;
     sdc->dma_readv   = scsi_block_dma_readv;
@@ -3095,6 +3108,7 @@ static void scsi_disk_class_initfn(ObjectClass *klass, void *data)
     SCSIDeviceClass *sc = SCSI_DEVICE_CLASS(klass);
 
     sc->realize      = scsi_disk_realize;
+    sc->unrealize    = scsi_unrealize;
     sc->alloc_req    = scsi_new_request;
     sc->unit_attention_reported = scsi_disk_unit_attention_reported;
     dc->fw_name = "disk";
-- 
2.13.3

[Qemu-devel] [QEMU] [PATCH 6/8] bootdevice: Refactor get_boot_devices_list

[Sam Eiderman]

Move device name construction to a separate function.

We will reuse this function in the following commit to pass logical CHS
parameters through fw_cfg much like we currently pass bootindex.

Reviewed-by: Karl Heubaum <karl.heubaum@oracle.com>
Reviewed-by: Arbel Moshe <arbel.moshe@oracle.com>
Signed-off-by: Sam Eiderman <shmuel.eiderman@oracle.com>
---
 bootdevice.c | 61 +++++++++++++++++++++++++++++++++---------------------------
 1 file changed, 34 insertions(+), 27 deletions(-)

diff --git a/bootdevice.c b/bootdevice.c
index bc5e1c2de4..2b12fb85a4 100644
--- a/bootdevice.c
+++ b/bootdevice.c
@@ -202,6 +202,39 @@ DeviceState *get_boot_device(uint32_t position)
     return res;
 }
 
+static char *get_boot_device_path(DeviceState *dev, bool ignore_suffixes,
+                                  char *suffix)
+{
+    char *devpath = NULL, *s = NULL, *d, *bootpath;
+
+    if (dev) {
+        devpath = qdev_get_fw_dev_path(dev);
+        assert(devpath);
+    }
+
+    if (!ignore_suffixes) {
+        if (dev) {
+            d = qdev_get_own_fw_dev_path_from_handler(dev->parent_bus, dev);
+            if (d) {
+                assert(!suffix);
+                s = d;
+            } else {
+                s = g_strdup(suffix);
+            }
+        } else {
+            s = g_strdup(suffix);
+        }
+    }
+
+    bootpath = g_strdup_printf("%s%s",
+                               devpath ? devpath : "",
+                               s ? s : "");
+    g_free(devpath);
+    g_free(s);
+
+    return bootpath;
+}
+
 /*
  * This function returns null terminated string that consist of new line
  * separated device paths.
@@ -218,36 +251,10 @@ char *get_boot_devices_list(size_t *size)
     bool ignore_suffixes = mc->ignore_boot_device_suffixes;
 
     QTAILQ_FOREACH(i, &fw_boot_order, link) {
-        char *devpath = NULL,  *suffix = NULL;
         char *bootpath;
-        char *d;
         size_t len;
 
-        if (i->dev) {
-            devpath = qdev_get_fw_dev_path(i->dev);
-            assert(devpath);
-        }
-
-        if (!ignore_suffixes) {
-            if (i->dev) {
-                d = qdev_get_own_fw_dev_path_from_handler(i->dev->parent_bus,
-                                                          i->dev);
-                if (d) {
-                    assert(!i->suffix);
-                    suffix = d;
-                } else {
-                    suffix = g_strdup(i->suffix);
-                }
-            } else {
-                suffix = g_strdup(i->suffix);
-            }
-        }
-
-        bootpath = g_strdup_printf("%s%s",
-                                   devpath ? devpath : "",
-                                   suffix ? suffix : "");
-        g_free(devpath);
-        g_free(suffix);
+        bootpath = get_boot_device_path(i->dev, ignore_suffixes, i->suffix);
 
         if (total) {
             list[total-1] = '\n';
-- 
2.13.3

[Qemu-devel] [QEMU] [PATCH 7/8] bootdevice: FW_CFG interface for LCHS values

[Sam Eiderman]

Using fw_cfg, supply logical CHS values directly from QEMU to the BIOS.

Non-standard logical geometries break under QEMU.

A virtual disk which contains an operating system which depends on
logical geometries (consistent values being reported from BIOS INT13
AH=08) will most likely break under QEMU/SeaBIOS if it has non-standard
logical geometries - for example 56 SPT (sectors per track).
No matter what QEMU will report - SeaBIOS, for large enough disks - will
use LBA translation, which will report 63 SPT instead.

In addition we cannot force SeaBIOS to rely on physical geometries at
all. A virtio-blk-pci virtual disk with 255 phyiscal heads cannot
report more than 16 physical heads when moved to an IDE controller,
since the ATA spec allows a maximum of 16 heads - this is an artifact of
virtualization.

By supplying the logical geometries directly we are able to support such
"exotic" disks.

We serialize this information in a similar way to the "bootorder"
interface.
The fw_cfg entry is "bootdevices" and it serializes a struct.
At the moment the struct holds the values of logical CHS values but it
can be expanded easily due to the extendable ABI implemented.

(In the future, we can pass the bootindex through "bootdevices" instead
"bootorder" - unifying all bootdevice information in one fw_cfg value)

The PV interface through fw_cfg could have also been implemented using
device specific keys, e.g.: "/etc/bootdevice/%s/logical_geometry" where
%s is the device name QEMU produces - but this implementation would
require much more code refactoring, both in QEMU and SeaBIOS, so the
current implementation was chosen.

Reviewed-by: Karl Heubaum <karl.heubaum@oracle.com>
Reviewed-by: Arbel Moshe <arbel.moshe@oracle.com>
Signed-off-by: Sam Eiderman <shmuel.eiderman@oracle.com>
---
 bootdevice.c            | 42 ++++++++++++++++++++++++++++++++++++++++++
 hw/nvram/fw_cfg.c       | 14 +++++++++++---
 include/sysemu/sysemu.h |  1 +
 3 files changed, 54 insertions(+), 3 deletions(-)

diff --git a/bootdevice.c b/bootdevice.c
index 2b12fb85a4..84c2a83f25 100644
--- a/bootdevice.c
+++ b/bootdevice.c
@@ -405,3 +405,45 @@ void del_boot_device_lchs(DeviceState *dev, const char *suffix)
         }
     }
 }
+
+typedef struct QEMU_PACKED BootDeviceEntrySerialized {
+    /* Do not change field order - add new fields below */
+    uint32_t lcyls;
+    uint32_t lheads;
+    uint32_t lsecs;
+} BootDeviceEntrySerialized;
+
+/* Serialized as: struct size (4) + (device name\0 + device struct) x devices */
+char *get_boot_devices_info(size_t *size)
+{
+    FWLCHSEntry *i;
+    BootDeviceEntrySerialized s;
+    size_t total = 0;
+    char *list = NULL;
+
+    list = g_malloc0(sizeof(uint32_t));
+    *((uint32_t *)list) = (uint32_t)sizeof(s);
+    total = sizeof(uint32_t);
+
+    QTAILQ_FOREACH(i, &fw_lchs, link) {
+        char *bootpath;
+        size_t len;
+
+        bootpath = get_boot_device_path(i->dev, false, i->suffix);
+        s.lcyls = i->lcyls;
+        s.lheads = i->lheads;
+        s.lsecs = i->lsecs;
+
+        len = strlen(bootpath) + 1;
+        list = g_realloc(list, total + len + sizeof(s));
+        memcpy(&list[total], bootpath, len);
+        memcpy(&list[total + len], &s, sizeof(s));
+        total += len + sizeof(s);
+
+        g_free(bootpath);
+    }
+
+    *size = total;
+
+    return list;
+}
diff --git a/hw/nvram/fw_cfg.c b/hw/nvram/fw_cfg.c
index 9f7b7789bc..008b21542f 100644
--- a/hw/nvram/fw_cfg.c
+++ b/hw/nvram/fw_cfg.c
@@ -916,13 +916,21 @@ void *fw_cfg_modify_file(FWCfgState *s, const char *filename,
 
 static void fw_cfg_machine_reset(void *opaque)
 {
+    MachineClass *mc = MACHINE_GET_CLASS(qdev_get_machine());
+    FWCfgState *s = opaque;
     void *ptr;
     size_t len;
-    FWCfgState *s = opaque;
-    char *bootindex = get_boot_devices_list(&len);
+    char *buf;
 
-    ptr = fw_cfg_modify_file(s, "bootorder", (uint8_t *)bootindex, len);
+    buf = get_boot_devices_list(&len);
+    ptr = fw_cfg_modify_file(s, "bootorder", (uint8_t *)buf, len);
     g_free(ptr);
+
+    if (!mc->legacy_fw_cfg_order) {
+        buf = get_boot_devices_info(&len);
+        ptr = fw_cfg_modify_file(s, "bootdevices", (uint8_t *)buf, len);
+        g_free(ptr);
+    }
 }
 
 static void fw_cfg_machine_ready(struct Notifier *n, void *data)
diff --git a/include/sysemu/sysemu.h b/include/sysemu/sysemu.h
index 173dfbb539..f0552006f4 100644
--- a/include/sysemu/sysemu.h
+++ b/include/sysemu/sysemu.h
@@ -174,6 +174,7 @@ void validate_bootdevices(const char *devices, Error **errp);
 void add_boot_device_lchs(DeviceState *dev, const char *suffix,
                           uint32_t lcyls, uint32_t lheads, uint32_t lsecs);
 void del_boot_device_lchs(DeviceState *dev, const char *suffix);
+char *get_boot_devices_info(size_t *size);
 
 /* handler to set the boot_device order for a specific type of MachineClass */
 typedef void QEMUBootSetHandler(void *opaque, const char *boot_order,
-- 
2.13.3

[Qemu-devel] [QEMU] [PATCH 8/8] hd-geo-test: Add tests for lchs override

[Sam Eiderman]

Add QTest tests to check the logical geometry override option.

The tests in hd-geo-test are out of date - they only test IDE and do not
test interesting MBRs.

I added a few helper functions which will make adding more tests easier.

QTest's fw_cfg helper functions support only legacy fw_cfg, so I had to
read the new fw_cfg layout on my own.

Creating qcow2 disks with specific size and MBR layout is currently
unused - we only use a default empty MBR.

Reviewed-by: Karl Heubaum <karl.heubaum@oracle.com>
Reviewed-by: Arbel Moshe <arbel.moshe@oracle.com>
Signed-off-by: Sam Eiderman <shmuel.eiderman@oracle.com>
---
 tests/Makefile.include |   2 +-
 tests/hd-geo-test.c    | 565 +++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 566 insertions(+), 1 deletion(-)

diff --git a/tests/Makefile.include b/tests/Makefile.include
index 46a36c2c95..55ea165ed4 100644
--- a/tests/Makefile.include
+++ b/tests/Makefile.include
@@ -765,7 +765,7 @@ tests/ide-test$(EXESUF): tests/ide-test.o $(libqos-pc-obj-y)
 tests/ahci-test$(EXESUF): tests/ahci-test.o $(libqos-pc-obj-y) qemu-img$(EXESUF)
 tests/ipmi-kcs-test$(EXESUF): tests/ipmi-kcs-test.o
 tests/ipmi-bt-test$(EXESUF): tests/ipmi-bt-test.o
-tests/hd-geo-test$(EXESUF): tests/hd-geo-test.o
+tests/hd-geo-test$(EXESUF): tests/hd-geo-test.o $(libqos-obj-y)
 tests/boot-order-test$(EXESUF): tests/boot-order-test.o $(libqos-obj-y)
 tests/boot-serial-test$(EXESUF): tests/boot-serial-test.o $(libqos-obj-y)
 tests/bios-tables-test$(EXESUF): tests/bios-tables-test.o \
diff --git a/tests/hd-geo-test.c b/tests/hd-geo-test.c
index 62eb624726..16e7447f75 100644
--- a/tests/hd-geo-test.c
+++ b/tests/hd-geo-test.c
@@ -17,7 +17,11 @@
 
 #include "qemu/osdep.h"
 #include "qemu-common.h"
+#include "qemu/bswap.h"
+#include "qapi/qmp/qlist.h"
 #include "libqtest.h"
+#include "libqos/fw_cfg.h"
+#include "standard-headers/linux/qemu_fw_cfg.h"
 
 #define ARGV_SIZE 256
 
@@ -388,6 +392,557 @@ static void test_ide_drive_cd_0(void)
     qtest_quit(qts);
 }
 
+typedef struct {
+    bool active;
+    uint32_t head;
+    uint32_t sector;
+    uint32_t cyl;
+    uint32_t end_head;
+    uint32_t end_sector;
+    uint32_t end_cyl;
+    uint32_t start_sect;
+    uint32_t nr_sects;
+} MBRpartitions[4];
+
+static MBRpartitions empty_mbr = { {false, 0, 0, 0, 0, 0, 0, 0, 0},
+                                   {false, 0, 0, 0, 0, 0, 0, 0, 0},
+                                   {false, 0, 0, 0, 0, 0, 0, 0, 0},
+                                   {false, 0, 0, 0, 0, 0, 0, 0, 0} };
+
+static char *create_qcow2_with_mbr(MBRpartitions mbr, uint64_t sectors)
+{
+    const char *template = "/tmp/qtest.XXXXXX";
+    char *raw_path = strdup(template);
+    char *qcow2_path = strdup(template);
+    char cmd[100 + 2 * PATH_MAX];
+    uint8_t buf[512];
+    int i, ret, fd, offset;
+    uint64_t qcow2_size = sectors * 512;
+    uint8_t status, parttype, head, sector, cyl;
+
+    offset = 0xbe;
+
+    for (i = 0; i < 4; i++) {
+        status = mbr[i].active ? 0x80 : 0x00;
+        g_assert(mbr[i].head < 256);
+        g_assert(mbr[i].sector < 64);
+        g_assert(mbr[i].cyl < 1024);
+        head = mbr[i].head;
+        sector = mbr[i].sector + ((mbr[i].cyl & 0x300) >> 2);
+        cyl = mbr[i].cyl & 0xff;
+
+        buf[offset + 0x0] = status;
+        buf[offset + 0x1] = head;
+        buf[offset + 0x2] = sector;
+        buf[offset + 0x3] = cyl;
+
+        parttype = 0;
+        g_assert(mbr[i].end_head < 256);
+        g_assert(mbr[i].end_sector < 64);
+        g_assert(mbr[i].end_cyl < 1024);
+        head = mbr[i].end_head;
+        sector = mbr[i].end_sector + ((mbr[i].end_cyl & 0x300) >> 2);
+        cyl = mbr[i].end_cyl & 0xff;
+
+        buf[offset + 0x4] = parttype;
+        buf[offset + 0x5] = head;
+        buf[offset + 0x6] = sector;
+        buf[offset + 0x7] = cyl;
+
+        (*(uint32_t *)&buf[offset + 0x8]) = cpu_to_le32(mbr[i].start_sect);
+        (*(uint32_t *)&buf[offset + 0xc]) = cpu_to_le32(mbr[i].nr_sects);
+
+        offset += 0x10;
+    }
+
+    fd = mkstemp(raw_path);
+    g_assert(fd);
+    close(fd);
+
+    fd = open(raw_path, O_WRONLY);
+    g_assert(fd >= 0);
+    ret = write(fd, buf, sizeof(buf));
+    g_assert(ret == sizeof(buf));
+    close(fd);
+
+    fd = mkstemp(qcow2_path);
+    g_assert(fd);
+    close(fd);
+
+    ret = snprintf(cmd, sizeof(cmd),
+                   "$QTEST_QEMU_IMG convert -f raw -O qcow2 %s %s > /dev/null",
+                   raw_path, qcow2_path);
+    g_assert((0 < ret) && (ret <= sizeof(cmd)));
+    ret = system(cmd);
+    g_assert(ret == 0);
+
+    ret = snprintf(cmd, sizeof(cmd),
+                   "$QTEST_QEMU_IMG resize %s %" PRIu64 " > /dev/null",
+                   qcow2_path, qcow2_size);
+    g_assert((0 < ret) && (ret <= sizeof(cmd)));
+    ret = system(cmd);
+    g_assert(ret == 0);
+
+    unlink(raw_path);
+    free(raw_path);
+
+    return qcow2_path;
+}
+
+struct QemuCfgFile {
+    uint32_t  size;        /* file size */
+    uint16_t  select;      /* write this to 0x510 to read it */
+    uint16_t  reserved;
+    char name[56];
+};
+
+static uint16_t find_fw_cfg_file(QFWCFG *fw_cfg,
+                                 const char *filename)
+{
+    struct QemuCfgFile qfile;
+    uint32_t count, e;
+    uint16_t select;
+
+    count = qfw_cfg_get_u32(fw_cfg, FW_CFG_FILE_DIR);
+    count = be32_to_cpu(count);
+    for (select = 0, e = 0; e < count; e++) {
+        qfw_cfg_read_data(fw_cfg, &qfile, sizeof(qfile));
+        if (!strcmp(filename, qfile.name)) {
+            select = be16_to_cpu(qfile.select);
+        }
+    }
+
+    return select;
+}
+
+static void read_fw_cfg_file(QFWCFG *fw_cfg,
+                             const char *filename,
+                             void *data,
+                             size_t len)
+{
+    uint16_t select = find_fw_cfg_file(fw_cfg, filename);
+
+    g_assert(select);
+
+    qfw_cfg_get(fw_cfg, select, data, len);
+}
+
+#define BOOTDEVICES_MAX_SIZE 10000
+
+typedef struct {
+    uint32_t c;
+    uint32_t h;
+    uint32_t s;
+} CHS;
+
+typedef struct {
+    const char *dev_path;
+    CHS chs;
+} CHSResult;
+
+static void read_bootdevices(QFWCFG *fw_cfg, CHSResult expected[])
+{
+    uint32_t info_size;
+    char *buf = g_malloc0(BOOTDEVICES_MAX_SIZE);
+    void *cur;
+    char *name;
+    CHS *chs;
+    GList *results = NULL, *cur_result;
+    CHSResult *r;
+    int i;
+    bool found;
+
+    read_fw_cfg_file(fw_cfg, "bootdevices", buf, BOOTDEVICES_MAX_SIZE);
+
+    cur = buf;
+
+    info_size = *((uint32_t *)cur);
+
+    g_assert(info_size >= sizeof(*chs));
+
+    cur += 4;
+
+    while (strlen(cur)) {
+        name = cur;
+        chs = cur + strlen(cur) + 1;
+
+        r = g_malloc0(sizeof(*r));
+        r->dev_path = name;
+        r->chs = *chs;
+
+        results = g_list_prepend(results, r);
+
+        cur += strlen(cur) + 1 + info_size;
+    }
+
+    i = 0;
+
+    while (expected[i].dev_path) {
+        found = false;
+        cur_result = results;
+        while (cur_result) {
+            r = cur_result->data;
+            if (!strcmp(r->dev_path, expected[i].dev_path) &&
+                !memcmp(&(r->chs), &(expected[i].chs), sizeof(r->chs))) {
+                found = true;
+                break;
+            }
+            cur_result = g_list_next(cur_result);
+        }
+        g_assert(found);
+        g_free(cur_result->data);
+        results = g_list_delete_link(results, cur_result);
+        i++;
+    }
+
+    g_assert(results == NULL);
+
+    g_free(buf);
+}
+
+#define MAX_DRIVES 30
+
+typedef struct {
+    char **argv;
+    int argc;
+    char **drives;
+    int n_drives;
+    int n_scsi_disks;
+    int n_scsi_controllers;
+    int n_virtio_disks;
+} TestArgs;
+
+static TestArgs *create_args(void)
+{
+    TestArgs *args = g_malloc0(sizeof(*args));
+    args->argv = g_new0(char *, ARGV_SIZE);
+    args->argc = append_arg(args->argc, args->argv,
+                            ARGV_SIZE, g_strdup("-nodefaults"));
+    args->drives = g_new0(char *, MAX_DRIVES);
+    return args;
+}
+
+static void add_drive_with_mbr(TestArgs *args,
+                               MBRpartitions mbr, uint64_t sectors)
+{
+    char *img_file_name;
+    char part[300];
+    int ret;
+
+    g_assert(args->n_drives < MAX_DRIVES);
+
+    img_file_name = create_qcow2_with_mbr(mbr, sectors);
+
+    args->drives[args->n_drives] = img_file_name;
+    ret = snprintf(part, sizeof(part),
+                   "-drive file=%s,if=none,format=qcow2,id=disk%d",
+                   img_file_name, args->n_drives);
+    g_assert((0 < ret) && (ret <= sizeof(part)));
+    args->argc = append_arg(args->argc, args->argv, ARGV_SIZE, g_strdup(part));
+    args->n_drives++;
+}
+
+static void add_ide_disk(TestArgs *args,
+                         int drive_idx, int bus, int unit, int c, int h, int s)
+{
+    char part[300];
+    int ret;
+
+    ret = snprintf(part, sizeof(part),
+                   "-device ide-hd,drive=disk%d,bus=ide.%d,unit=%d,"
+                   "lcyls=%d,lheads=%d,lsecs=%d",
+                   drive_idx, bus, unit, c, h, s);
+    g_assert((0 < ret) && (ret <= sizeof(part)));
+    args->argc = append_arg(args->argc, args->argv, ARGV_SIZE, g_strdup(part));
+}
+
+static void add_scsi_controller(TestArgs *args,
+                                const char *type,
+                                const char *bus,
+                                int addr)
+{
+    char part[300];
+    int ret;
+
+    ret = snprintf(part, sizeof(part),
+                   "-device %s,id=scsi%d,bus=%s,addr=%d",
+                   type, args->n_scsi_controllers, bus, addr);
+    g_assert((0 < ret) && (ret <= sizeof(part)));
+    args->argc = append_arg(args->argc, args->argv, ARGV_SIZE, g_strdup(part));
+    args->n_scsi_controllers++;
+}
+
+static void add_scsi_disk(TestArgs *args,
+                          int drive_idx, int bus,
+                          int channel, int scsi_id, int lun,
+                          int c, int h, int s)
+{
+    char part[300];
+    int ret;
+
+    ret = snprintf(part, sizeof(part),
+                   "-device scsi-hd,id=scsi-disk%d,drive=disk%d,"
+                   "bus=scsi%d.0,"
+                   "channel=%d,scsi-id=%d,lun=%d,"
+                   "lcyls=%d,lheads=%d,lsecs=%d",
+                   args->n_scsi_disks, drive_idx, bus, channel, scsi_id, lun,
+                   c, h, s);
+    g_assert((0 < ret) && (ret <= sizeof(part)));
+    args->argc = append_arg(args->argc, args->argv, ARGV_SIZE, g_strdup(part));
+    args->n_scsi_disks++;
+}
+
+static void add_virtio_disk(TestArgs *args,
+                            int drive_idx, const char *bus, int addr,
+                            int c, int h, int s)
+{
+    char part[300];
+    int ret;
+
+    ret = snprintf(part, sizeof(part),
+                   "-device virtio-blk-pci,id=virtio-disk%d,"
+                   "drive=disk%d,bus=%s,addr=%d,"
+                   "lcyls=%d,lheads=%d,lsecs=%d",
+                   args->n_virtio_disks, drive_idx, bus, addr, c, h, s);
+    g_assert((0 < ret) && (ret <= sizeof(part)));
+    args->argc = append_arg(args->argc, args->argv, ARGV_SIZE, g_strdup(part));
+    args->n_virtio_disks++;
+}
+
+static void test_override(TestArgs *args, CHSResult expected[])
+{
+    char *joined_args;
+    QFWCFG *fw_cfg;
+    int i;
+
+    joined_args = g_strjoinv(" ", args->argv);
+
+    qtest_start(joined_args);
+    fw_cfg = pc_fw_cfg_init(global_qtest);
+
+    read_bootdevices(fw_cfg, expected);
+
+    g_free(joined_args);
+    qtest_end();
+
+    g_free(fw_cfg);
+
+    for (i = 0; i < args->n_drives; i++) {
+        unlink(args->drives[i]);
+        free(args->drives[i]);
+    }
+    g_free(args->drives);
+    g_strfreev(args->argv);
+    g_free(args);
+}
+
+static void test_override_ide(void)
+{
+    TestArgs *args = create_args();
+    CHSResult expected[] = {
+        {"/pci@i0cf8/ide@1,1/drive@0/disk@0", 10000, 120, 30},
+        {"/pci@i0cf8/ide@1,1/drive@0/disk@1", 9000, 120, 30},
+        {"/pci@i0cf8/ide@1,1/drive@1/disk@0", 0, 1, 1},
+        {"/pci@i0cf8/ide@1,1/drive@1/disk@1", 1, 0, 0},
+        {NULL, 0, 0, 0}
+    };
+    add_drive_with_mbr(args, empty_mbr, 1);
+    add_drive_with_mbr(args, empty_mbr, 1);
+    add_drive_with_mbr(args, empty_mbr, 1);
+    add_drive_with_mbr(args, empty_mbr, 1);
+    add_ide_disk(args, 0, 0, 0, 10000, 120, 30);
+    add_ide_disk(args, 1, 0, 1, 9000, 120, 30);
+    add_ide_disk(args, 2, 1, 0, 0, 1, 1);
+    add_ide_disk(args, 3, 1, 1, 1, 0, 0);
+    test_override(args, expected);
+}
+
+static void test_override_scsi(void)
+{
+    TestArgs *args = create_args();
+    CHSResult expected[] = {
+        {"/pci@i0cf8/scsi@3/channel@0/disk@0,0", 10000, 120, 30},
+        {"/pci@i0cf8/scsi@3/channel@0/disk@1,0", 9000, 120, 30},
+        {"/pci@i0cf8/scsi@3/channel@0/disk@2,0", 1, 0, 0},
+        {"/pci@i0cf8/scsi@3/channel@0/disk@3,0", 0, 1, 0},
+        {NULL, 0, 0, 0}
+    };
+    add_drive_with_mbr(args, empty_mbr, 1);
+    add_drive_with_mbr(args, empty_mbr, 1);
+    add_drive_with_mbr(args, empty_mbr, 1);
+    add_drive_with_mbr(args, empty_mbr, 1);
+    add_scsi_controller(args, "lsi53c895a", "pci.0", 3);
+    add_scsi_disk(args, 0, 0, 0, 0, 0, 10000, 120, 30);
+    add_scsi_disk(args, 1, 0, 0, 1, 0, 9000, 120, 30);
+    add_scsi_disk(args, 2, 0, 0, 2, 0, 1, 0, 0);
+    add_scsi_disk(args, 3, 0, 0, 3, 0, 0, 1, 0);
+    test_override(args, expected);
+}
+
+static void test_override_scsi_2_controllers(void)
+{
+    TestArgs *args = create_args();
+    CHSResult expected[] = {
+        {"/pci@i0cf8/scsi@3/channel@0/disk@0,0", 10000, 120, 30},
+        {"/pci@i0cf8/scsi@3/channel@0/disk@1,0", 9000, 120, 30},
+        {"/pci@i0cf8/scsi@4/channel@0/disk@0,1", 1, 0, 0},
+        {"/pci@i0cf8/scsi@4/channel@0/disk@1,2", 0, 1, 0},
+        {NULL, 0, 0, 0}
+    };
+    add_drive_with_mbr(args, empty_mbr, 1);
+    add_drive_with_mbr(args, empty_mbr, 1);
+    add_drive_with_mbr(args, empty_mbr, 1);
+    add_drive_with_mbr(args, empty_mbr, 1);
+    add_scsi_controller(args, "lsi53c895a", "pci.0", 3);
+    add_scsi_controller(args, "virtio-scsi-pci", "pci.0", 4);
+    add_scsi_disk(args, 0, 0, 0, 0, 0, 10000, 120, 30);
+    add_scsi_disk(args, 1, 0, 0, 1, 0, 9000, 120, 30);
+    add_scsi_disk(args, 2, 1, 0, 0, 1, 1, 0, 0);
+    add_scsi_disk(args, 3, 1, 0, 1, 2, 0, 1, 0);
+    test_override(args, expected);
+}
+
+static void test_override_virtio_blk(void)
+{
+    TestArgs *args = create_args();
+    CHSResult expected[] = {
+        {"/pci@i0cf8/scsi@3/disk@0,0", 10000, 120, 30},
+        {"/pci@i0cf8/scsi@4/disk@0,0", 9000, 120, 30},
+        {NULL, 0, 0, 0}
+    };
+    add_drive_with_mbr(args, empty_mbr, 1);
+    add_drive_with_mbr(args, empty_mbr, 1);
+    add_virtio_disk(args, 0, "pci.0", 3, 10000, 120, 30);
+    add_virtio_disk(args, 1, "pci.0", 4, 9000, 120, 30);
+    test_override(args, expected);
+}
+
+static void test_override_zero_chs(void)
+{
+    TestArgs *args = create_args();
+    CHSResult expected[] = {
+        {NULL, 0, 0, 0}
+    };
+    add_drive_with_mbr(args, empty_mbr, 1);
+    add_ide_disk(args, 0, 1, 1, 0, 0, 0);
+    test_override(args, expected);
+}
+
+static void test_override_scsi_hot_unplug(void)
+{
+    char *joined_args;
+    QFWCFG *fw_cfg;
+    QDict *response;
+    int i;
+    TestArgs *args = create_args();
+    CHSResult expected[] = {
+        {"/pci@i0cf8/scsi@2/channel@0/disk@0,0", 10000, 120, 30},
+        {"/pci@i0cf8/scsi@2/channel@0/disk@1,0", 20, 20, 20},
+        {NULL, 0, 0, 0}
+    };
+    CHSResult expected2[] = {
+        {"/pci@i0cf8/scsi@2/channel@0/disk@1,0", 20, 20, 20},
+        {NULL, 0, 0, 0}
+    };
+    add_drive_with_mbr(args, empty_mbr, 1);
+    add_drive_with_mbr(args, empty_mbr, 1);
+    add_scsi_controller(args, "virtio-scsi-pci", "pci.0", 2);
+    add_scsi_disk(args, 0, 0, 0, 0, 0, 10000, 120, 30);
+    add_scsi_disk(args, 1, 0, 0, 1, 0, 20, 20, 20);
+
+    joined_args = g_strjoinv(" ", args->argv);
+
+    qtest_start(joined_args);
+    fw_cfg = pc_fw_cfg_init(global_qtest);
+
+    read_bootdevices(fw_cfg, expected);
+
+    /* unplug device an restart */
+    response = qmp("{ 'execute': 'device_del',"
+                   "  'arguments': {'id': 'scsi-disk0' }}");
+    g_assert(response);
+    g_assert(!qdict_haskey(response, "error"));
+    qobject_unref(response);
+    response = qmp("{ 'execute': 'system_reset', 'arguments': { }}");
+    g_assert(response);
+    g_assert(!qdict_haskey(response, "error"));
+    qobject_unref(response);
+
+    qtest_qmp_eventwait(global_qtest, "RESET");
+
+    read_bootdevices(fw_cfg, expected2);
+
+    g_free(joined_args);
+    qtest_end();
+
+    g_free(fw_cfg);
+
+    for (i = 0; i < args->n_drives; i++) {
+        unlink(args->drives[i]);
+        free(args->drives[i]);
+    }
+    g_free(args->drives);
+    g_strfreev(args->argv);
+    g_free(args);
+}
+
+static void test_override_virtio_hot_unplug(void)
+{
+    char *joined_args;
+    QFWCFG *fw_cfg;
+    QDict *response;
+    int i;
+    TestArgs *args = create_args();
+    CHSResult expected[] = {
+        {"/pci@i0cf8/scsi@2/disk@0,0", 10000, 120, 30},
+        {"/pci@i0cf8/scsi@3/disk@0,0", 20, 20, 20},
+        {NULL, 0, 0, 0}
+    };
+    CHSResult expected2[] = {
+        {"/pci@i0cf8/scsi@3/disk@0,0", 20, 20, 20},
+        {NULL, 0, 0, 0}
+    };
+    add_drive_with_mbr(args, empty_mbr, 1);
+    add_drive_with_mbr(args, empty_mbr, 1);
+    add_virtio_disk(args, 0, "pci.0", 2, 10000, 120, 30);
+    add_virtio_disk(args, 1, "pci.0", 3, 20, 20, 20);
+
+    joined_args = g_strjoinv(" ", args->argv);
+
+    qtest_start(joined_args);
+    fw_cfg = pc_fw_cfg_init(global_qtest);
+
+    read_bootdevices(fw_cfg, expected);
+
+    /* unplug device an restart */
+    response = qmp("{ 'execute': 'device_del',"
+                   "  'arguments': {'id': 'virtio-disk0' }}");
+    g_assert(response);
+    g_assert(!qdict_haskey(response, "error"));
+    qobject_unref(response);
+    response = qmp("{ 'execute': 'system_reset', 'arguments': { }}");
+    g_assert(response);
+    g_assert(!qdict_haskey(response, "error"));
+    qobject_unref(response);
+
+    qtest_qmp_eventwait(global_qtest, "RESET");
+
+    read_bootdevices(fw_cfg, expected2);
+
+    g_free(joined_args);
+    qtest_end();
+
+    g_free(fw_cfg);
+
+    for (i = 0; i < args->n_drives; i++) {
+        unlink(args->drives[i]);
+        free(args->drives[i]);
+    }
+    g_free(args->drives);
+    g_strfreev(args->argv);
+    g_free(args);
+}
+
 int main(int argc, char **argv)
 {
     Backend i;
@@ -413,6 +968,16 @@ int main(int argc, char **argv)
     qtest_add_func("hd-geo/ide/device/mbr/chs", test_ide_device_mbr_chs);
     qtest_add_func("hd-geo/ide/device/user/chs", test_ide_device_user_chs);
     qtest_add_func("hd-geo/ide/device/user/chst", test_ide_device_user_chst);
+    qtest_add_func("hd-geo/override/ide", test_override_ide);
+    qtest_add_func("hd-geo/override/scsi", test_override_scsi);
+    qtest_add_func("hd-geo/override/scsi_2_controllers",
+                   test_override_scsi_2_controllers);
+    qtest_add_func("hd-geo/override/virtio_blk", test_override_virtio_blk);
+    qtest_add_func("hd-geo/override/zero_chs", test_override_zero_chs);
+    qtest_add_func("hd-geo/override/scsi_hot_unplug",
+                   test_override_scsi_hot_unplug);
+    qtest_add_func("hd-geo/override/virtio_hot_unplug",
+                   test_override_virtio_hot_unplug);
 
     ret = g_test_run();
 
-- 
2.13.3

Re: [Qemu-devel] [SeaBIOS] [QEMU] [PATCH 0/8] Add Qemu to SeaBIOS LCHS interface

[no-reply]

Patchew URL: https://patchew.org/QEMU/20190612094237.47462-1-shmuel.eiderman@oracle.com/



Hi,

This series seems to have some coding style problems. See output below for
more information:

Subject: [SeaBIOS] [QEMU] [PATCH 0/8] Add Qemu to SeaBIOS LCHS interface
Type: series
Message-id: 20190612094237.47462-1-shmuel.eiderman@oracle.com

=== TEST SCRIPT BEGIN ===
#!/bin/bash
git rev-parse base > /dev/null || exit 0
git config --local diff.renamelimit 0
git config --local diff.renames True
git config --local diff.algorithm histogram
./scripts/checkpatch.pl --mailback base..
=== TEST SCRIPT END ===

From https://github.com/patchew-project/qemu
 * [new tag]               patchew/20190612094237.47462-1-shmuel.eiderman@oracle.com -> patchew/20190612094237.47462-1-shmuel.eiderman@oracle.com
Switched to a new branch 'test'
a9a0cfc956 hd-geo-test: Add tests for lchs override
d1b86f9f47 bootdevice: FW_CFG interface for LCHS values
48dd083d65 bootdevice: Refactor get_boot_devices_list
f37e8f7c3c bootdevice: Gather LCHS from all relevant devices
8a7193c16b scsi: Propagate unrealize() callback to scsi-hd
c0a3a43fe2 bootdevice: Add interface to gather LCHS
9ebc9c1fd9 block: Support providing LCHS from user
6593400075 block: Refactor macros - fix tabbing

=== OUTPUT BEGIN ===
1/8 Checking commit 659340007537 (block: Refactor macros - fix tabbing)
ERROR: Macros with complex values should be enclosed in parenthesis
#55: FILE: include/hw/block/block.h:65:
+#define DEFINE_BLOCK_CHS_PROPERTIES(_state, _conf)                      \
+    DEFINE_PROP_UINT32("cyls", _state, _conf.cyls, 0),                  \
+    DEFINE_PROP_UINT32("heads", _state, _conf.heads, 0),                \
     DEFINE_PROP_UINT32("secs", _state, _conf.secs, 0)

total: 1 errors, 0 warnings, 37 lines checked

Patch 1/8 has style problems, please review.  If any of these errors
are false positives report them to the maintainer, see
CHECKPATCH in MAINTAINERS.

2/8 Checking commit 9ebc9c1fd9a2 (block: Support providing LCHS from user)
3/8 Checking commit c0a3a43fe22e (bootdevice: Add interface to gather LCHS)
4/8 Checking commit 8a7193c16bb9 (scsi: Propagate unrealize() callback to scsi-hd)
5/8 Checking commit f37e8f7c3cc6 (bootdevice: Gather LCHS from all relevant devices)
6/8 Checking commit 48dd083d65ed (bootdevice: Refactor get_boot_devices_list)
7/8 Checking commit d1b86f9f478c (bootdevice: FW_CFG interface for LCHS values)
8/8 Checking commit a9a0cfc956a7 (hd-geo-test: Add tests for lchs override)
=== OUTPUT END ===

Test command exited with code: 1


The full log is available at
http://patchew.org/logs/20190612094237.47462-1-shmuel.eiderman@oracle.com/testing.checkpatch/?type=message.
---
Email generated automatically by Patchew [https://patchew.org/].
Please send your feedback to patchew-devel@redhat.com

Re: [Qemu-devel] [SeaBIOS] [QEMU] [PATCH 0/8] Add Qemu to SeaBIOS LCHS interface

[no-reply]

Patchew URL: https://patchew.org/QEMU/20190612094237.47462-1-shmuel.eiderman@oracle.com/



Hi,

This series failed the asan build test. Please find the testing commands and
their output below. If you have Docker installed, you can probably reproduce it
locally.

=== TEST SCRIPT BEGIN ===
#!/bin/bash
time make docker-test-debug@fedora TARGET_LIST=x86_64-softmmu J=14 NETWORK=1
=== TEST SCRIPT END ===

clang -iquote /tmp/qemu-test/build/tests -iquote tests -iquote /tmp/qemu-test/src/tcg -iquote /tmp/qemu-test/src/tcg/i386 -I/tmp/qemu-test/src/linux-headers -I/tmp/qemu-test/build/linux-headers -iquote . -iquote /tmp/qemu-test/src -iquote /tmp/qemu-test/src/accel/tcg -iquote /tmp/qemu-test/src/include -I/usr/include/pixman-1  -I/tmp/qemu-test/src/dtc/libfdt -Werror -DHAS_LIBSSH2_SFTP_FSYNC  -pthread -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include  -fPIE -DPIE -m64 -mcx16 -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -Wstrict-prototypes -Wredundant-decls -Wall -Wundef -Wwrite-strings -Wmissing-prototypes -fno-strict-aliasing -fno-common -fwrapv -std=gnu99  -Wno-string-plus-int -Wno-typedef-redefinition -Wno-initializer-overrides -Wexpansion-to-defined -Wendif-labels -Wno-shift-negative-value -Wno-missing-include-dirs -Wempty-body -Wnested-externs -Wformat-security -Wformat-y2k -Winit-self -Wignored-qualifiers -Wold-style-definition -Wtype-limits -fstack-protector-strong  -I/usr/include/p11-kit-1     -I/usr/include/libpng16  -I/usr/include/spice-1 -I/usr/include/spice-server -I/usr/include/cacard -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -I/usr/include/nss3 -I/usr/include/nspr4 -pthread -I/usr/include/libmount -I/usr/include/blkid -I/usr/include/uuid -I/usr/include/pixman-1   -I/tmp/qemu-test/src/tests -MMD -MP -MT tests/tpm-tis-swtpm-test.o -MF tests/tpm-tis-swtpm-test.d -fsanitize=undefined -fsanitize=address -g   -c -o tests/tpm-tis-swtpm-test.o /tmp/qemu-test/src/tests/tpm-tis-swtpm-test.c
clang -iquote /tmp/qemu-test/build/tests -iquote tests -iquote /tmp/qemu-test/src/tcg -iquote /tmp/qemu-test/src/tcg/i386 -I/tmp/qemu-test/src/linux-headers -I/tmp/qemu-test/build/linux-headers -iquote . -iquote /tmp/qemu-test/src -iquote /tmp/qemu-test/src/accel/tcg -iquote /tmp/qemu-test/src/include -I/usr/include/pixman-1  -I/tmp/qemu-test/src/dtc/libfdt -Werror -DHAS_LIBSSH2_SFTP_FSYNC  -pthread -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include  -fPIE -DPIE -m64 -mcx16 -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -Wstrict-prototypes -Wredundant-decls -Wall -Wundef -Wwrite-strings -Wmissing-prototypes -fno-strict-aliasing -fno-common -fwrapv -std=gnu99  -Wno-string-plus-int -Wno-typedef-redefinition -Wno-initializer-overrides -Wexpansion-to-defined -Wendif-labels -Wno-shift-negative-value -Wno-missing-include-dirs -Wempty-body -Wnested-externs -Wformat-security -Wformat-y2k -Winit-self -Wignored-qualifiers -Wold-style-definition -Wtype-limits -fstack-protector-strong  -I/usr/include/p11-kit-1     -I/usr/include/libpng16  -I/usr/include/spice-1 -I/usr/include/spice-server -I/usr/include/cacard -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -I/usr/include/nss3 -I/usr/include/nspr4 -pthread -I/usr/include/libmount -I/usr/include/blkid -I/usr/include/uuid -I/usr/include/pixman-1   -I/tmp/qemu-test/src/tests -MMD -MP -MT tests/tpm-tis-test.o -MF tests/tpm-tis-test.d -fsanitize=undefined -fsanitize=address -g   -c -o tests/tpm-tis-test.o /tmp/qemu-test/src/tests/tpm-tis-test.c
clang -iquote /tmp/qemu-test/build/. -iquote . -iquote /tmp/qemu-test/src/tcg -iquote /tmp/qemu-test/src/tcg/i386 -I/tmp/qemu-test/src/linux-headers -I/tmp/qemu-test/build/linux-headers -iquote . -iquote /tmp/qemu-test/src -iquote /tmp/qemu-test/src/accel/tcg -iquote /tmp/qemu-test/src/include -I/tmp/qemu-test/src/tests/fp -I/tmp/qemu-test/src/tests/fp/berkeley-softfloat-3/source/include -I/tmp/qemu-test/src/tests/fp/berkeley-softfloat-3/source/8086-SSE -I/tmp/qemu-test/src/tests/fp/berkeley-testfloat-3/source -I/usr/include/pixman-1 -I/tmp/qemu-test/src/dtc/libfdt -Werror -DHAS_LIBSSH2_SFTP_FSYNC -pthread -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -fPIE -DPIE -m64 -mcx16 -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -Wstrict-prototypes -Wredundant-decls -Wall -Wundef -Wwrite-strings -Wmissing-prototypes -fno-strict-aliasing -fno-common -fwrapv -std=gnu99 -Wno-string-plus-int -Wno-typedef-redefinition -Wno-initializer-overrides -Wexpansion-to-defined -Wendif-labels -Wno-shift-negative-value -Wno-missing-include-dirs -Wempty-body -Wnested-externs -Wformat-security -Wformat-y2k -Winit-self -Wignored-qualifiers -Wold-style-definition -Wtype-limits -fstack-protector-strong -I/usr/include/p11-kit-1 -I/usr/include/libpng16 -I/usr/include/spice-1 -I/usr/include/spice-server -I/usr/include/cacard -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -I/usr/include/nss3 -I/usr/include/nspr4 -pthread -I/usr/include/libmount -I/usr/include/blkid -I/usr/include/uuid -I/usr/include/pixman-1 -DHW_POISON_H -DTARGET_ARM  -DSOFTFLOAT_ROUND_ODD -DINLINE_LEVEL=5 -DSOFTFLOAT_FAST_DIV32TO16 -DSOFTFLOAT_FAST_DIV64TO32 -DSOFTFLOAT_FAST_INT64  -DFLOAT16 -DFLOAT64 -DEXTFLOAT80 -DFLOAT128 -DFLOAT_ROUND_ODD -DLONG_DOUBLE_IS_EXTFLOAT80  -Wno-strict-prototypes -Wno-unknown-pragmas -Wno-uninitialized -Wno-missing-prototypes -Wno-return-type -Wno-unused-function -Wno-error -MMD -MP -MT test_a_i64_z_f16.o -MF ./test_a_i64_z_f16.d -fsanitize=undefined -fsanitize=address -g   -c -o test_a_i64_z_f16.o /tmp/qemu-test/src/tests/fp/berkeley-testfloat-3/source/test_a_i64_z_f16.c
/tmp/qemu-test/src/tests/hd-geo-test.c:743:47: error: suggest braces around initialization of subobject [-Werror,-Wmissing-braces]
        {"/pci@i0cf8/ide@1,1/drive@0/disk@0", 10000, 120, 30},
                                              ^~~~~~~~~~~~~~
                                              {             }
/tmp/qemu-test/src/tests/hd-geo-test.c:744:47: error: suggest braces around initialization of subobject [-Werror,-Wmissing-braces]
        {"/pci@i0cf8/ide@1,1/drive@0/disk@1", 9000, 120, 30},
                                              ^~~~~~~~~~~~~
                                              {            }
/tmp/qemu-test/src/tests/hd-geo-test.c:745:47: error: suggest braces around initialization of subobject [-Werror,-Wmissing-braces]
        {"/pci@i0cf8/ide@1,1/drive@1/disk@0", 0, 1, 1},
                                              ^~~~~~~
                                              {      }
/tmp/qemu-test/src/tests/hd-geo-test.c:746:47: error: suggest braces around initialization of subobject [-Werror,-Wmissing-braces]
        {"/pci@i0cf8/ide@1,1/drive@1/disk@1", 1, 0, 0},
                                              ^~~~~~~
                                              {      }
/tmp/qemu-test/src/tests/hd-geo-test.c:747:16: error: suggest braces around initialization of subobject [-Werror,-Wmissing-braces]
        {NULL, 0, 0, 0}
               ^~~~~~~
               {      }
/tmp/qemu-test/src/tests/hd-geo-test.c:764:50: error: suggest braces around initialization of subobject [-Werror,-Wmissing-braces]
        {"/pci@i0cf8/scsi@3/channel@0/disk@0,0", 10000, 120, 30},
                                                 ^~~~~~~~~~~~~~
                                                 {             }
/tmp/qemu-test/src/tests/hd-geo-test.c:765:50: error: suggest braces around initialization of subobject [-Werror,-Wmissing-braces]
        {"/pci@i0cf8/scsi@3/channel@0/disk@1,0", 9000, 120, 30},
                                                 ^~~~~~~~~~~~~
                                                 {            }
/tmp/qemu-test/src/tests/hd-geo-test.c:766:50: error: suggest braces around initialization of subobject [-Werror,-Wmissing-braces]
        {"/pci@i0cf8/scsi@3/channel@0/disk@2,0", 1, 0, 0},
                                                 ^~~~~~~
                                                 {      }
/tmp/qemu-test/src/tests/hd-geo-test.c:767:50: error: suggest braces around initialization of subobject [-Werror,-Wmissing-braces]
        {"/pci@i0cf8/scsi@3/channel@0/disk@3,0", 0, 1, 0},
                                                 ^~~~~~~
                                                 {      }
/tmp/qemu-test/src/tests/hd-geo-test.c:768:16: error: suggest braces around initialization of subobject [-Werror,-Wmissing-braces]
        {NULL, 0, 0, 0}
               ^~~~~~~
               {      }
/tmp/qemu-test/src/tests/hd-geo-test.c:786:50: error: suggest braces around initialization of subobject [-Werror,-Wmissing-braces]
        {"/pci@i0cf8/scsi@3/channel@0/disk@0,0", 10000, 120, 30},
                                                 ^~~~~~~~~~~~~~
                                                 {             }
/tmp/qemu-test/src/tests/hd-geo-test.c:787:50: error: suggest braces around initialization of subobject [-Werror,-Wmissing-braces]
        {"/pci@i0cf8/scsi@3/channel@0/disk@1,0", 9000, 120, 30},
                                                 ^~~~~~~~~~~~~
                                                 {            }
/tmp/qemu-test/src/tests/hd-geo-test.c:788:50: error: suggest braces around initialization of subobject [-Werror,-Wmissing-braces]
        {"/pci@i0cf8/scsi@4/channel@0/disk@0,1", 1, 0, 0},
                                                 ^~~~~~~
                                                 {      }
/tmp/qemu-test/src/tests/hd-geo-test.c:789:50: error: suggest braces around initialization of subobject [-Werror,-Wmissing-braces]
        {"/pci@i0cf8/scsi@4/channel@0/disk@1,2", 0, 1, 0},
                                                 ^~~~~~~
                                                 {      }
/tmp/qemu-test/src/tests/hd-geo-test.c:790:16: error: suggest braces around initialization of subobject [-Werror,-Wmissing-braces]
        {NULL, 0, 0, 0}
               ^~~~~~~
               {      }
/tmp/qemu-test/src/tests/hd-geo-test.c:809:40: error: suggest braces around initialization of subobject [-Werror,-Wmissing-braces]
        {"/pci@i0cf8/scsi@3/disk@0,0", 10000, 120, 30},
                                       ^~~~~~~~~~~~~~
                                       {             }
/tmp/qemu-test/src/tests/hd-geo-test.c:810:40: error: suggest braces around initialization of subobject [-Werror,-Wmissing-braces]
        {"/pci@i0cf8/scsi@4/disk@0,0", 9000, 120, 30},
                                       ^~~~~~~~~~~~~
                                       {            }
/tmp/qemu-test/src/tests/hd-geo-test.c:811:16: error: suggest braces around initialization of subobject [-Werror,-Wmissing-braces]
        {NULL, 0, 0, 0}
               ^~~~~~~
               {      }
/tmp/qemu-test/src/tests/hd-geo-test.c:824:16: error: suggest braces around initialization of subobject [-Werror,-Wmissing-braces]
        {NULL, 0, 0, 0}
               ^~~~~~~
               {      }
fatal error: too many errors emitted, stopping now [-ferror-limit=]
20 errors generated.
clang -iquote /tmp/qemu-test/build/tests -iquote tests -iquote /tmp/qemu-test/src/tcg -iquote /tmp/qemu-test/src/tcg/i386 -I/tmp/qemu-test/src/linux-headers -I/tmp/qemu-test/build/linux-headers -iquote . -iquote /tmp/qemu-test/src -iquote /tmp/qemu-test/src/accel/tcg -iquote /tmp/qemu-test/src/include -I/usr/include/pixman-1  -I/tmp/qemu-test/src/dtc/libfdt -Werror -DHAS_LIBSSH2_SFTP_FSYNC  -pthread -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include  -fPIE -DPIE -m64 -mcx16 -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -Wstrict-prototypes -Wredundant-decls -Wall -Wundef -Wwrite-strings -Wmissing-prototypes -fno-strict-aliasing -fno-common -fwrapv -std=gnu99  -Wno-string-plus-int -Wno-typedef-redefinition -Wno-initializer-overrides -Wexpansion-to-defined -Wendif-labels -Wno-shift-negative-value -Wno-missing-include-dirs -Wempty-body -Wnested-externs -Wformat-security -Wformat-y2k -Winit-self -Wignored-qualifiers -Wold-style-definition -Wtype-limits -fstack-protector-strong  -I/usr/include/p11-kit-1     -I/usr/include/libpng16  -I/usr/include/spice-1 -I/usr/include/spice-server -I/usr/include/cacard -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -I/usr/include/nss3 -I/usr/include/nspr4 -pthread -I/usr/include/libmount -I/usr/include/blkid -I/usr/include/uuid -I/usr/include/pixman-1   -I/tmp/qemu-test/src/tests -MMD -MP -MT tests/test-netfilter.o -MF tests/test-netfilter.d -fsanitize=undefined -fsanitize=address -g   -c -o tests/test-netfilter.o /tmp/qemu-test/src/tests/test-netfilter.c
make: *** [/tmp/qemu-test/src/rules.mak:69: tests/hd-geo-test.o] Error 1


The full log is available at
http://patchew.org/logs/20190612094237.47462-1-shmuel.eiderman@oracle.com/testing.asan/?type=message.
---
Email generated automatically by Patchew [https://patchew.org/].
Please send your feedback to patchew-devel@redhat.com

Re: [Qemu-devel] [QEMU] [PATCH 7/8] bootdevice: FW_CFG interface for LCHS values

[Laszlo Ersek]

On 06/12/19 11:42, Sam Eiderman wrote:
> Using fw_cfg, supply logical CHS values directly from QEMU to the BIOS.
> 
> Non-standard logical geometries break under QEMU.
> 
> A virtual disk which contains an operating system which depends on
> logical geometries (consistent values being reported from BIOS INT13
> AH=08) will most likely break under QEMU/SeaBIOS if it has non-standard
> logical geometries - for example 56 SPT (sectors per track).
> No matter what QEMU will report - SeaBIOS, for large enough disks - will
> use LBA translation, which will report 63 SPT instead.
> 
> In addition we cannot force SeaBIOS to rely on physical geometries at
> all. A virtio-blk-pci virtual disk with 255 phyiscal heads cannot
> report more than 16 physical heads when moved to an IDE controller,
> since the ATA spec allows a maximum of 16 heads - this is an artifact of
> virtualization.
> 
> By supplying the logical geometries directly we are able to support such
> "exotic" disks.
> 
> We serialize this information in a similar way to the "bootorder"
> interface.
> The fw_cfg entry is "bootdevices" and it serializes a struct.
> At the moment the struct holds the values of logical CHS values but it
> can be expanded easily due to the extendable ABI implemented.
> 
> (In the future, we can pass the bootindex through "bootdevices" instead
> "bootorder" - unifying all bootdevice information in one fw_cfg value)

I would disagree with that. UEFI guest firmware doesn't seem to have any
use for this new type of information ("logical CHS values"), so the
current interface (the "bootorder" fw_cfg file) should continue to work.
The ArmVirtQemu and OVMF platform firmwares (built from the edk2
project, and bundled with QEMU 4.1+) implement some serious parsing and
processing for "bootorder".

Independently, another comment:

> The PV interface through fw_cfg could have also been implemented using
> device specific keys, e.g.: "/etc/bootdevice/%s/logical_geometry" where
> %s is the device name QEMU produces - but this implementation would
> require much more code refactoring, both in QEMU and SeaBIOS, so the
> current implementation was chosen.
> 
> Reviewed-by: Karl Heubaum <karl.heubaum@oracle.com>
> Reviewed-by: Arbel Moshe <arbel.moshe@oracle.com>
> Signed-off-by: Sam Eiderman <shmuel.eiderman@oracle.com>
> ---
>  bootdevice.c            | 42 ++++++++++++++++++++++++++++++++++++++++++
>  hw/nvram/fw_cfg.c       | 14 +++++++++++---
>  include/sysemu/sysemu.h |  1 +
>  3 files changed, 54 insertions(+), 3 deletions(-)
> 
> diff --git a/bootdevice.c b/bootdevice.c
> index 2b12fb85a4..84c2a83f25 100644
> --- a/bootdevice.c
> +++ b/bootdevice.c
> @@ -405,3 +405,45 @@ void del_boot_device_lchs(DeviceState *dev, const char *suffix)
>          }
>      }
>  }
> +
> +typedef struct QEMU_PACKED BootDeviceEntrySerialized {
> +    /* Do not change field order - add new fields below */
> +    uint32_t lcyls;
> +    uint32_t lheads;
> +    uint32_t lsecs;
> +} BootDeviceEntrySerialized;
> +
> +/* Serialized as: struct size (4) + (device name\0 + device struct) x devices */
> +char *get_boot_devices_info(size_t *size)
> +{
> +    FWLCHSEntry *i;
> +    BootDeviceEntrySerialized s;
> +    size_t total = 0;
> +    char *list = NULL;
> +
> +    list = g_malloc0(sizeof(uint32_t));
> +    *((uint32_t *)list) = (uint32_t)sizeof(s);
> +    total = sizeof(uint32_t);
> +
> +    QTAILQ_FOREACH(i, &fw_lchs, link) {
> +        char *bootpath;
> +        size_t len;
> +
> +        bootpath = get_boot_device_path(i->dev, false, i->suffix);
> +        s.lcyls = i->lcyls;
> +        s.lheads = i->lheads;
> +        s.lsecs = i->lsecs;

You should document the endianness of the fields in
BootDeviceEntrySerialized, and then call byte order conversion functions
here accordingly (most probably cpu_to_le32()).

As written, this code would break if you ran qemu-system-x86_64 /
qemu-system-i386 (with TCG acceleration) on a big endian host.

Thanks
Laszlo

> +
> +        len = strlen(bootpath) + 1;
> +        list = g_realloc(list, total + len + sizeof(s));
> +        memcpy(&list[total], bootpath, len);
> +        memcpy(&list[total + len], &s, sizeof(s));
> +        total += len + sizeof(s);
> +
> +        g_free(bootpath);
> +    }
> +
> +    *size = total;
> +
> +    return list;
> +}
> diff --git a/hw/nvram/fw_cfg.c b/hw/nvram/fw_cfg.c
> index 9f7b7789bc..008b21542f 100644
> --- a/hw/nvram/fw_cfg.c
> +++ b/hw/nvram/fw_cfg.c
> @@ -916,13 +916,21 @@ void *fw_cfg_modify_file(FWCfgState *s, const char *filename,
>  
>  static void fw_cfg_machine_reset(void *opaque)
>  {
> +    MachineClass *mc = MACHINE_GET_CLASS(qdev_get_machine());
> +    FWCfgState *s = opaque;
>      void *ptr;
>      size_t len;
> -    FWCfgState *s = opaque;
> -    char *bootindex = get_boot_devices_list(&len);
> +    char *buf;
>  
> -    ptr = fw_cfg_modify_file(s, "bootorder", (uint8_t *)bootindex, len);
> +    buf = get_boot_devices_list(&len);
> +    ptr = fw_cfg_modify_file(s, "bootorder", (uint8_t *)buf, len);
>      g_free(ptr);
> +
> +    if (!mc->legacy_fw_cfg_order) {
> +        buf = get_boot_devices_info(&len);
> +        ptr = fw_cfg_modify_file(s, "bootdevices", (uint8_t *)buf, len);
> +        g_free(ptr);
> +    }
>  }
>  
>  static void fw_cfg_machine_ready(struct Notifier *n, void *data)
> diff --git a/include/sysemu/sysemu.h b/include/sysemu/sysemu.h
> index 173dfbb539..f0552006f4 100644
> --- a/include/sysemu/sysemu.h
> +++ b/include/sysemu/sysemu.h
> @@ -174,6 +174,7 @@ void validate_bootdevices(const char *devices, Error **errp);
>  void add_boot_device_lchs(DeviceState *dev, const char *suffix,
>                            uint32_t lcyls, uint32_t lheads, uint32_t lsecs);
>  void del_boot_device_lchs(DeviceState *dev, const char *suffix);
> +char *get_boot_devices_info(size_t *size);
>  
>  /* handler to set the boot_device order for a specific type of MachineClass */
>  typedef void QEMUBootSetHandler(void *opaque, const char *boot_order,
> 

Re: [Qemu-devel] [QEMU] [PATCH 7/8] bootdevice: FW_CFG interface for LCHS values

[Sam Eiderman]

> On 12 Jun 2019, at 15:27, Laszlo Ersek <lersek@redhat.com> wrote:
> 
> On 06/12/19 11:42, Sam Eiderman wrote:
>> Using fw_cfg, supply logical CHS values directly from QEMU to the BIOS.
>> 
>> Non-standard logical geometries break under QEMU.
>> 
>> A virtual disk which contains an operating system which depends on
>> logical geometries (consistent values being reported from BIOS INT13
>> AH=08) will most likely break under QEMU/SeaBIOS if it has non-standard
>> logical geometries - for example 56 SPT (sectors per track).
>> No matter what QEMU will report - SeaBIOS, for large enough disks - will
>> use LBA translation, which will report 63 SPT instead.
>> 
>> In addition we cannot force SeaBIOS to rely on physical geometries at
>> all. A virtio-blk-pci virtual disk with 255 phyiscal heads cannot
>> report more than 16 physical heads when moved to an IDE controller,
>> since the ATA spec allows a maximum of 16 heads - this is an artifact of
>> virtualization.
>> 
>> By supplying the logical geometries directly we are able to support such
>> "exotic" disks.
>> 
>> We serialize this information in a similar way to the "bootorder"
>> interface.
>> The fw_cfg entry is "bootdevices" and it serializes a struct.
>> At the moment the struct holds the values of logical CHS values but it
>> can be expanded easily due to the extendable ABI implemented.
>> 
>> (In the future, we can pass the bootindex through "bootdevices" instead
>> "bootorder" - unifying all bootdevice information in one fw_cfg value)
> 
> I would disagree with that. UEFI guest firmware doesn't seem to have any
> use for this new type of information ("logical CHS values"), so the
> current interface (the "bootorder" fw_cfg file) should continue to work.
> The ArmVirtQemu and OVMF platform firmwares (built from the edk2
> project, and bundled with QEMU 4.1+) implement some serious parsing and
> processing for "bootorder”.

I agree, I didn’t mean to say that “bootdevices" will replace “bootorder”,
they will have to reside side by side.
I just meant to emphasis that bootorder is not extendible - adding more disk
specific fields other than bootorder (that for some platforms will be unused)
is not possible. “bootdevices” will work for LCHS, if another entry has to be
passed - it can be added to “bootdevice”.
Migrating “bootorder” into a different fw_cfg value is a tedious, probably not
worth it, effort.

> 
> Independently, another comment:
> 
>> The PV interface through fw_cfg could have also been implemented using
>> device specific keys, e.g.: "/etc/bootdevice/%s/logical_geometry" where
>> %s is the device name QEMU produces - but this implementation would
>> require much more code refactoring, both in QEMU and SeaBIOS, so the
>> current implementation was chosen.
>> 
>> Reviewed-by: Karl Heubaum <karl.heubaum@oracle.com>
>> Reviewed-by: Arbel Moshe <arbel.moshe@oracle.com>
>> Signed-off-by: Sam Eiderman <shmuel.eiderman@oracle.com>
>> ---
>> bootdevice.c            | 42 ++++++++++++++++++++++++++++++++++++++++++
>> hw/nvram/fw_cfg.c       | 14 +++++++++++---
>> include/sysemu/sysemu.h |  1 +
>> 3 files changed, 54 insertions(+), 3 deletions(-)
>> 
>> diff --git a/bootdevice.c b/bootdevice.c
>> index 2b12fb85a4..84c2a83f25 100644
>> --- a/bootdevice.c
>> +++ b/bootdevice.c
>> @@ -405,3 +405,45 @@ void del_boot_device_lchs(DeviceState *dev, const char *suffix)
>>         }
>>     }
>> }
>> +
>> +typedef struct QEMU_PACKED BootDeviceEntrySerialized {
>> +    /* Do not change field order - add new fields below */
>> +    uint32_t lcyls;
>> +    uint32_t lheads;
>> +    uint32_t lsecs;
>> +} BootDeviceEntrySerialized;
>> +
>> +/* Serialized as: struct size (4) + (device name\0 + device struct) x devices */
>> +char *get_boot_devices_info(size_t *size)
>> +{
>> +    FWLCHSEntry *i;
>> +    BootDeviceEntrySerialized s;
>> +    size_t total = 0;
>> +    char *list = NULL;
>> +
>> +    list = g_malloc0(sizeof(uint32_t));
>> +    *((uint32_t *)list) = (uint32_t)sizeof(s);
>> +    total = sizeof(uint32_t);
>> +
>> +    QTAILQ_FOREACH(i, &fw_lchs, link) {
>> +        char *bootpath;
>> +        size_t len;
>> +
>> +        bootpath = get_boot_device_path(i->dev, false, i->suffix);
>> +        s.lcyls = i->lcyls;
>> +        s.lheads = i->lheads;
>> +        s.lsecs = i->lsecs;
> 
> You should document the endianness of the fields in
> BootDeviceEntrySerialized, and then call byte order conversion functions
> here accordingly (most probably cpu_to_le32()).
> 
> As written, this code would break if you ran qemu-system-x86_64 /
> qemu-system-i386 (with TCG acceleration) on a big endian host.

Nice catch, thanks!

> 
> Thanks
> Laszlo
> 
>> +
>> +        len = strlen(bootpath) + 1;
>> +        list = g_realloc(list, total + len + sizeof(s));
>> +        memcpy(&list[total], bootpath, len);
>> +        memcpy(&list[total + len], &s, sizeof(s));
>> +        total += len + sizeof(s);
>> +
>> +        g_free(bootpath);
>> +    }
>> +
>> +    *size = total;
>> +
>> +    return list;
>> +}
>> diff --git a/hw/nvram/fw_cfg.c b/hw/nvram/fw_cfg.c
>> index 9f7b7789bc..008b21542f 100644
>> --- a/hw/nvram/fw_cfg.c
>> +++ b/hw/nvram/fw_cfg.c
>> @@ -916,13 +916,21 @@ void *fw_cfg_modify_file(FWCfgState *s, const char *filename,
>> 
>> static void fw_cfg_machine_reset(void *opaque)
>> {
>> +    MachineClass *mc = MACHINE_GET_CLASS(qdev_get_machine());
>> +    FWCfgState *s = opaque;
>>     void *ptr;
>>     size_t len;
>> -    FWCfgState *s = opaque;
>> -    char *bootindex = get_boot_devices_list(&len);
>> +    char *buf;
>> 
>> -    ptr = fw_cfg_modify_file(s, "bootorder", (uint8_t *)bootindex, len);
>> +    buf = get_boot_devices_list(&len);
>> +    ptr = fw_cfg_modify_file(s, "bootorder", (uint8_t *)buf, len);
>>     g_free(ptr);
>> +
>> +    if (!mc->legacy_fw_cfg_order) {
>> +        buf = get_boot_devices_info(&len);
>> +        ptr = fw_cfg_modify_file(s, "bootdevices", (uint8_t *)buf, len);
>> +        g_free(ptr);
>> +    }
>> }
>> 
>> static void fw_cfg_machine_ready(struct Notifier *n, void *data)
>> diff --git a/include/sysemu/sysemu.h b/include/sysemu/sysemu.h
>> index 173dfbb539..f0552006f4 100644
>> --- a/include/sysemu/sysemu.h
>> +++ b/include/sysemu/sysemu.h
>> @@ -174,6 +174,7 @@ void validate_bootdevices(const char *devices, Error **errp);
>> void add_boot_device_lchs(DeviceState *dev, const char *suffix,
>>                           uint32_t lcyls, uint32_t lheads, uint32_t lsecs);
>> void del_boot_device_lchs(DeviceState *dev, const char *suffix);
>> +char *get_boot_devices_info(size_t *size);
>> 
>> /* handler to set the boot_device order for a specific type of MachineClass */
>> typedef void QEMUBootSetHandler(void *opaque, const char *boot_order,