[Qemu-devel] [PULL v4 00/18] pci,misc enhancements

[Qemu-devel] [PULL v4 00/18] pci,misc enhancements

[Michael S. Tsirkin]

From: Michael S. Tsirkin <mst@redhat.com>

Changes from v3:
    - fix up xen build

Changes from v2:
    - rebased to origin/master
    - fixed up botched posting

The following changes since commit ab8bf29078e0ab8347e2ff8b4e5542f7a0c751cf:

  Merge remote-tracking branch 'qemu-kvm/uq/master' into staging (2013-07-03 08:37:00 -0500)

are available in the git repository at:


  git://git.kernel.org/pub/scm/virt/kvm/mst/qemu.git tags/for_anthony

for you to fetch changes up to 7588e2b0559ae72d3c2952c7807fc05c03099970:

  pci: Fold host_buses list into PCIHostState functionality (2013-07-07 23:10:57 +0300)

----------------------------------------------------------------
pci,misc enhancements

This includes some pci enhancements:

Better support for systems with multiple PCI root buses
FW cfg interface for more robust pci programming in BIOS
Minor fixes/cleanups for fw cfg and cross-version migration -
    because of dependencies with other patches

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

----------------------------------------------------------------
Andrew Jones (1):
      e1000: cleanup process_tx_desc

David Gibson (10):
      pci: Cleanup configuration for pci-hotplug.c
      pci: Move pci_read_devaddr to pci-hotplug-old.c
      pci: Abolish pci_find_root_bus()
      pci: Use helper to find device's root bus in pci_find_domain()
      pci: Replace pci_find_domain() with more general pci_root_bus_path()
      pci: Add root bus argument to pci_get_bus_devfn()
      pci: Add root bus parameter to pci_nic_init()
      pci: Simpler implementation of primary PCI bus
      pci: Remove domain from PCIHostBus
      pci: Fold host_buses list into PCIHostState functionality

Michael S. Tsirkin (7):
      range: add Range structure
      pci: store PCI hole ranges in guestinfo structure
      pc: pass PCI hole ranges to Guests
      pc_piix: cleanup init compat handling
      MAINTAINERS: s/Marcelo/Paolo/
      pvpanic: initialization cleanup
      pvpanic: fix fwcfg for big endian hosts

 MAINTAINERS                                 |   2 +-
 default-configs/i386-softmmu.mak            |   3 +-
 default-configs/ppc64-softmmu.mak           |   2 -
 default-configs/x86_64-softmmu.mak          |   3 +-
 hmp-commands.hx                             |   4 +-
 hw/alpha/dp264.c                            |   2 +-
 hw/arm/realview.c                           |   6 +-
 hw/arm/versatilepb.c                        |   2 +-
 hw/i386/pc.c                                |  74 ++++++++++++++-
 hw/i386/pc_piix.c                           |  42 ++++++---
 hw/i386/pc_q35.c                            |  18 +++-
 hw/mips/mips_fulong2e.c                     |   6 +-
 hw/mips/mips_malta.c                        |   6 +-
 hw/misc/pvpanic.c                           |  31 ++++---
 hw/net/e1000.c                              |  18 ++--
 hw/pci-host/piix.c                          |   9 ++
 hw/pci-host/q35.c                           |  17 ++++
 hw/pci/Makefile.objs                        |   2 +-
 hw/pci/{pci-hotplug.c => pci-hotplug-old.c} |  75 ++++++++++++---
 hw/pci/pci.c                                | 137 ++++++++++++++--------------
 hw/pci/pci_host.c                           |   1 +
 hw/pci/pcie_aer.c                           |   9 +-
 hw/ppc/e500.c                               |   2 +-
 hw/ppc/mac_newworld.c                       |   2 +-
 hw/ppc/mac_oldworld.c                       |   2 +-
 hw/ppc/ppc440_bamboo.c                      |   2 +-
 hw/ppc/prep.c                               |   2 +-
 hw/ppc/spapr.c                              |   2 +-
 hw/ppc/spapr_pci.c                          |  10 ++
 hw/sh4/r2d.c                                |   5 +-
 hw/sparc64/sun4u.c                          |   2 +-
 include/hw/i386/pc.h                        |  22 ++++-
 include/hw/pci-host/q35.h                   |   2 +
 include/hw/pci/pci.h                        |  17 ++--
 include/hw/pci/pci_host.h                   |  12 +++
 include/qemu/range.h                        |  16 ++++
 include/qemu/typedefs.h                     |   1 +
 37 files changed, 405 insertions(+), 163 deletions(-)
 rename hw/pci/{pci-hotplug.c => pci-hotplug-old.c} (78%)

-- 
MST

[Qemu-devel] [PULL v4 01/18] range: add Range structure

[Michael S. Tsirkin]

Sometimes we need to pass ranges around, add a
handy structure for this purpose.

Note: memory.c defines its own concept of AddrRange structure for
working with 128 addresses.  It's necessary there for doing range math.
This is not needed for most users: struct Range is
much simpler, and is only used for passing the range around.

Cc: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 include/qemu/range.h | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/include/qemu/range.h b/include/qemu/range.h
index 3502372..b76cc0d 100644
--- a/include/qemu/range.h
+++ b/include/qemu/range.h
@@ -1,6 +1,22 @@
 #ifndef QEMU_RANGE_H
 #define QEMU_RANGE_H
 
+#include <inttypes.h>
+
+/*
+ * Operations on 64 bit address ranges.
+ * Notes:
+ *   - ranges must not wrap around 0, but can include the last byte ~0x0LL.
+ *   - this can not represent a full 0 to ~0x0LL range.
+ */
+
+/* A structure representing a range of addresses. */
+struct Range {
+    uint64_t begin; /* First byte of the range, or 0 if empty. */
+    uint64_t end;   /* 1 + the last byte. 0 if range empty or ends at ~0x0LL. */
+};
+typedef struct Range Range;
+
 /* Get last byte of a range from offset + length.
  * Undefined for ranges that wrap around 0. */
 static inline uint64_t range_get_last(uint64_t offset, uint64_t len)
-- 
MST

[Qemu-devel] [PULL v4 03/18] pc: pass PCI hole ranges to Guests

[Michael S. Tsirkin]

Guest currently has to jump through lots of hoops to guess the PCI hole
ranges.  It's fragile, and makes us change BIOS each time we add a new
chipset.  Let's report the window in a ROM file, to make BIOS do exactly
what QEMU intends.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/i386/pc.c         | 26 ++++++++++++++++++++++++++
 hw/i386/pc_piix.c    | 16 +++++++++++++++-
 hw/i386/pc_q35.c     | 12 ++++++++++--
 include/hw/i386/pc.h |  1 +
 4 files changed, 52 insertions(+), 3 deletions(-)

diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 8af1e4e..7c4794c 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -989,6 +989,31 @@ void pc_cpus_init(const char *cpu_model, DeviceState *icc_bridge)
     }
 }
 
+/* pci-info ROM file. Little endian format */
+typedef struct PcRomPciInfo {
+    uint64_t w32_min;
+    uint64_t w32_max;
+    uint64_t w64_min;
+    uint64_t w64_max;
+} PcRomPciInfo;
+
+static void pc_fw_cfg_guest_info(PcGuestInfo *guest_info)
+{
+    PcRomPciInfo *info;
+    if (!guest_info->has_pci_info) {
+        return;
+    }
+
+    info = g_malloc(sizeof *info);
+    info->w32_min = cpu_to_le64(guest_info->pci_info.w32.begin);
+    info->w32_max = cpu_to_le64(guest_info->pci_info.w32.end);
+    info->w64_min = cpu_to_le64(guest_info->pci_info.w64.begin);
+    info->w64_max = cpu_to_le64(guest_info->pci_info.w64.end);
+    /* Pass PCI hole info to guest via a side channel.
+     * Required so guest PCI enumeration does the right thing. */
+    fw_cfg_add_file(guest_info->fw_cfg, "etc/pci-info", info, sizeof *info);
+}
+
 typedef struct PcGuestInfoState {
     PcGuestInfo info;
     Notifier machine_done;
@@ -1000,6 +1025,7 @@ void pc_guest_info_machine_done(Notifier *notifier, void *data)
     PcGuestInfoState *guest_info_state = container_of(notifier,
                                                       PcGuestInfoState,
                                                       machine_done);
+    pc_fw_cfg_guest_info(&guest_info_state->info);
 }
 
 PcGuestInfo *pc_guest_info_init(ram_addr_t below_4g_mem_size,
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index 4637bde..8a18dbe 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -57,6 +57,7 @@ static const int ide_iobase2[MAX_IDE_BUS] = { 0x3f6, 0x376 };
 static const int ide_irq[MAX_IDE_BUS] = { 14, 15 };
 
 static bool has_pvpanic = true;
+static bool has_pci_info = true;
 
 /* PC hardware initialisation */
 static void pc_init1(MemoryRegion *system_memory,
@@ -126,6 +127,7 @@ static void pc_init1(MemoryRegion *system_memory,
     }
 
     guest_info = pc_guest_info_init(below_4g_mem_size, above_4g_mem_size);
+    guest_info->has_pci_info = has_pci_info;
 
     /* Set PCI window size the way seabios has always done it. */
     /* Power of 2 so bios can cover it with a single MTRR */
@@ -260,8 +262,15 @@ static void pc_init_pci(QEMUMachineInitArgs *args)
              initrd_filename, cpu_model, 1, 1);
 }
 
+static void pc_init_pci_1_5(QEMUMachineInitArgs *args)
+{
+    has_pci_info = false;
+    pc_init_pci(args);
+}
+
 static void pc_init_pci_1_4(QEMUMachineInitArgs *args)
 {
+    has_pci_info = false;
     has_pvpanic = false;
     x86_cpu_compat_set_features("n270", FEAT_1_ECX, 0, CPUID_EXT_MOVBE);
     pc_init_pci(args);
@@ -269,6 +278,7 @@ static void pc_init_pci_1_4(QEMUMachineInitArgs *args)
 
 static void pc_init_pci_1_3(QEMUMachineInitArgs *args)
 {
+    has_pci_info = false;
     enable_compat_apic_id_mode();
     has_pvpanic = false;
     pc_init_pci(args);
@@ -277,6 +287,7 @@ static void pc_init_pci_1_3(QEMUMachineInitArgs *args)
 /* PC machine init function for pc-1.1 to pc-1.2 */
 static void pc_init_pci_1_2(QEMUMachineInitArgs *args)
 {
+    has_pci_info = false;
     disable_kvm_pv_eoi();
     enable_compat_apic_id_mode();
     has_pvpanic = false;
@@ -286,6 +297,7 @@ static void pc_init_pci_1_2(QEMUMachineInitArgs *args)
 /* PC machine init function for pc-0.14 to pc-1.0 */
 static void pc_init_pci_1_0(QEMUMachineInitArgs *args)
 {
+    has_pci_info = false;
     disable_kvm_pv_eoi();
     enable_compat_apic_id_mode();
     has_pvpanic = false;
@@ -302,6 +314,7 @@ static void pc_init_pci_no_kvmclock(QEMUMachineInitArgs *args)
     const char *initrd_filename = args->initrd_filename;
     const char *boot_device = args->boot_device;
     has_pvpanic = false;
+    has_pci_info = false;
     disable_kvm_pv_eoi();
     enable_compat_apic_id_mode();
     pc_init1(get_system_memory(),
@@ -320,6 +333,7 @@ static void pc_init_isa(QEMUMachineInitArgs *args)
     const char *initrd_filename = args->initrd_filename;
     const char *boot_device = args->boot_device;
     has_pvpanic = false;
+    has_pci_info = false;
     if (cpu_model == NULL)
         cpu_model = "486";
     disable_kvm_pv_eoi();
@@ -359,7 +373,7 @@ static QEMUMachine pc_i440fx_machine_v1_6 = {
 static QEMUMachine pc_i440fx_machine_v1_5 = {
     .name = "pc-i440fx-1.5",
     .desc = "Standard PC (i440FX + PIIX, 1996)",
-    .init = pc_init_pci,
+    .init = pc_init_pci_1_5,
     .hot_add_cpu = pc_hot_add_cpu,
     .max_cpus = 255,
     .compat_props = (GlobalProperty[]) {
diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
index a13acf2..5b92160 100644
--- a/hw/i386/pc_q35.c
+++ b/hw/i386/pc_q35.c
@@ -47,6 +47,7 @@
 #define MAX_SATA_PORTS     6
 
 static bool has_pvpanic = true;
+static bool has_pci_info = true;
 
 /* PC hardware initialisation */
 static void pc_q35_init(QEMUMachineInitArgs *args)
@@ -107,6 +108,7 @@ static void pc_q35_init(QEMUMachineInitArgs *args)
     }
 
     guest_info = pc_guest_info_init(below_4g_mem_size, above_4g_mem_size);
+    guest_info->has_pci_info = has_pci_info;
 
     /* allocate ram and load rom/bios */
     if (!xen_enabled()) {
@@ -212,11 +214,17 @@ static void pc_q35_init(QEMUMachineInitArgs *args)
     }
 }
 
+static void pc_q35_init_1_5(QEMUMachineInitArgs *args)
+{
+    has_pci_info = false;
+    pc_q35_init(args);
+}
+
 static void pc_q35_init_1_4(QEMUMachineInitArgs *args)
 {
     has_pvpanic = false;
     x86_cpu_compat_set_features("n270", FEAT_1_ECX, 0, CPUID_EXT_MOVBE);
-    pc_q35_init(args);
+    pc_q35_init_1_5(args);
 }
 
 static QEMUMachine pc_q35_machine_v1_6 = {
@@ -232,7 +240,7 @@ static QEMUMachine pc_q35_machine_v1_6 = {
 static QEMUMachine pc_q35_machine_v1_5 = {
     .name = "pc-q35-1.5",
     .desc = "Standard PC (Q35 + ICH9, 2009)",
-    .init = pc_q35_init,
+    .init = pc_q35_init_1_5,
     .hot_add_cpu = pc_hot_add_cpu,
     .max_cpus = 255,
     .compat_props = (GlobalProperty[]) {
diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index eaf6a5d..dbdd523 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -20,6 +20,7 @@ typedef struct PcPciInfo {
 
 struct PcGuestInfo {
     PcPciInfo pci_info;
+    bool has_pci_info;
     FWCfgState *fw_cfg;
 };
 
-- 
MST

[Qemu-devel] [PULL v4 04/18] pc_piix: cleanup init compat handling

[Michael S. Tsirkin]

Make sure 1.4 calls 1.5, 1.3 calls 1.4 etc.
This way it's enough to add enough new compat hook
in a single place in piix.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/i386/pc_piix.c | 18 ++++--------------
 1 file changed, 4 insertions(+), 14 deletions(-)

diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index 8a18dbe..e393022 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -270,38 +270,28 @@ static void pc_init_pci_1_5(QEMUMachineInitArgs *args)
 
 static void pc_init_pci_1_4(QEMUMachineInitArgs *args)
 {
-    has_pci_info = false;
     has_pvpanic = false;
     x86_cpu_compat_set_features("n270", FEAT_1_ECX, 0, CPUID_EXT_MOVBE);
-    pc_init_pci(args);
+    pc_init_pci_1_5(args);
 }
 
 static void pc_init_pci_1_3(QEMUMachineInitArgs *args)
 {
-    has_pci_info = false;
     enable_compat_apic_id_mode();
-    has_pvpanic = false;
-    pc_init_pci(args);
+    pc_init_pci_1_4(args);
 }
 
 /* PC machine init function for pc-1.1 to pc-1.2 */
 static void pc_init_pci_1_2(QEMUMachineInitArgs *args)
 {
-    has_pci_info = false;
     disable_kvm_pv_eoi();
-    enable_compat_apic_id_mode();
-    has_pvpanic = false;
-    pc_init_pci(args);
+    pc_init_pci_1_3(args);
 }
 
 /* PC machine init function for pc-0.14 to pc-1.0 */
 static void pc_init_pci_1_0(QEMUMachineInitArgs *args)
 {
-    has_pci_info = false;
-    disable_kvm_pv_eoi();
-    enable_compat_apic_id_mode();
-    has_pvpanic = false;
-    pc_init_pci(args);
+    pc_init_pci_1_2(args);
 }
 
 /* PC init function for pc-0.10 to pc-0.13, and reused by xenfv */
-- 
MST

[Qemu-devel] [PULL v4 05/18] e1000: cleanup process_tx_desc

[Michael S. Tsirkin]

From: Andrew Jones <drjones@redhat.com>

Coverity complains about two overruns in process_tx_desc(). The
complaints are false positives, but we might as well eliminate
them. The problem is that "hdr" is defined as an unsigned int,
but then used to offset an array of size 65536, and another of
size 256 bytes. hdr will actually never be greater than 255
though, as it's assigned only once and to the value of
tp->hdr_len, which is an uint8_t. This patch simply gets rid of
hdr, replacing it with tp->hdr_len, which makes it consistent
with all other tp member use in the function.

v2:
 - also cleanup coding style issues in the touched lines

Signed-off-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/net/e1000.c | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/hw/net/e1000.c b/hw/net/e1000.c
index e6f46f0..620f947 100644
--- a/hw/net/e1000.c
+++ b/hw/net/e1000.c
@@ -556,7 +556,7 @@ process_tx_desc(E1000State *s, struct e1000_tx_desc *dp)
     uint32_t txd_lower = le32_to_cpu(dp->lower.data);
     uint32_t dtype = txd_lower & (E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D);
     unsigned int split_size = txd_lower & 0xffff, bytes, sz, op;
-    unsigned int msh = 0xfffff, hdr = 0;
+    unsigned int msh = 0xfffff;
     uint64_t addr;
     struct e1000_context_desc *xp = (struct e1000_context_desc *)dp;
     struct e1000_tx *tp = &s->tx;
@@ -603,8 +603,7 @@ process_tx_desc(E1000State *s, struct e1000_tx_desc *dp)
         
     addr = le64_to_cpu(dp->buffer_addr);
     if (tp->tse && tp->cptse) {
-        hdr = tp->hdr_len;
-        msh = hdr + tp->mss;
+        msh = tp->hdr_len + tp->mss;
         do {
             bytes = split_size;
             if (tp->size + bytes > msh)
@@ -612,14 +611,16 @@ process_tx_desc(E1000State *s, struct e1000_tx_desc *dp)
 
             bytes = MIN(sizeof(tp->data) - tp->size, bytes);
             pci_dma_read(&s->dev, addr, tp->data + tp->size, bytes);
-            if ((sz = tp->size + bytes) >= hdr && tp->size < hdr)
-                memmove(tp->header, tp->data, hdr);
+            sz = tp->size + bytes;
+            if (sz >= tp->hdr_len && tp->size < tp->hdr_len) {
+                memmove(tp->header, tp->data, tp->hdr_len);
+            }
             tp->size = sz;
             addr += bytes;
             if (sz == msh) {
                 xmit_seg(s);
-                memmove(tp->data, tp->header, hdr);
-                tp->size = hdr;
+                memmove(tp->data, tp->header, tp->hdr_len);
+                tp->size = tp->hdr_len;
             }
         } while (split_size -= bytes);
     } else if (!tp->tse && tp->cptse) {
@@ -633,8 +634,9 @@ process_tx_desc(E1000State *s, struct e1000_tx_desc *dp)
 
     if (!(txd_lower & E1000_TXD_CMD_EOP))
         return;
-    if (!(tp->tse && tp->cptse && tp->size < hdr))
+    if (!(tp->tse && tp->cptse && tp->size < tp->hdr_len)) {
         xmit_seg(s);
+    }
     tp->tso_frames = 0;
     tp->sum_needed = 0;
     tp->vlan_needed = 0;
-- 
MST

[Qemu-devel] [PULL v4 06/18] MAINTAINERS: s/Marcelo/Paolo/

[Michael S. Tsirkin]

Marcelo doesn't maintain kvm anymore,
Paolo is taking over the job.
Update MAINTAINERS to stop flooding Marcelo with mail.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 MAINTAINERS | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/MAINTAINERS b/MAINTAINERS
index ad9c860..11dffee 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -155,7 +155,7 @@ Guest CPU Cores (KVM):
 
 Overall
 M: Gleb Natapov <gleb@redhat.com>
-M: Marcelo Tosatti <mtosatti@redhat.com>
+M: Paolo Bonzini <pbonzini@redhat.com>
 L: kvm@vger.kernel.org
 S: Supported
 F: kvm-*
-- 
MST

[Qemu-devel] [PULL v4 07/18] pvpanic: initialization cleanup

[Michael S. Tsirkin]

Avoid use of static variables: PC systems
initialize pvpanic device through pvpanic_init,
so we can simply create the fw_cfg file at that point.
This also makes it possible to skip device
creation completely if fw_cfg is not there, e.g. for xen -
so the ports it reserves are not discoverable by guests.

Also, make pvpanic_init void since callers ignore return
status anyway.

Cc: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Paul Durrant <Paul.Durrant@citrix.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/misc/pvpanic.c    | 30 ++++++++++++++++--------------
 include/hw/i386/pc.h |  2 +-
 2 files changed, 17 insertions(+), 15 deletions(-)

diff --git a/hw/misc/pvpanic.c b/hw/misc/pvpanic.c
index 060099b..83ed226 100644
--- a/hw/misc/pvpanic.c
+++ b/hw/misc/pvpanic.c
@@ -97,26 +97,28 @@ static void pvpanic_isa_realizefn(DeviceState *dev, Error **errp)
 {
     ISADevice *d = ISA_DEVICE(dev);
     PVPanicState *s = ISA_PVPANIC_DEVICE(dev);
-    static bool port_configured;
-    FWCfgState *fw_cfg;
 
     isa_register_ioport(d, &s->io, s->ioport);
+}
 
-    if (!port_configured) {
-        fw_cfg = fw_cfg_find();
-        if (fw_cfg) {
-            fw_cfg_add_file(fw_cfg, "etc/pvpanic-port",
-                            g_memdup(&s->ioport, sizeof(s->ioport)),
-                            sizeof(s->ioport));
-            port_configured = true;
-        }
-    }
+static void pvpanic_fw_cfg(ISADevice *dev, FWCfgState *fw_cfg)
+{
+    PVPanicState *s = ISA_PVPANIC_DEVICE(dev);
+
+    fw_cfg_add_file(fw_cfg, "etc/pvpanic-port",
+                    g_memdup(&s->ioport, sizeof(s->ioport)),
+                    sizeof(s->ioport));
 }
 
-int pvpanic_init(ISABus *bus)
+void pvpanic_init(ISABus *bus)
 {
-    isa_create_simple(bus, TYPE_ISA_PVPANIC_DEVICE);
-    return 0;
+    ISADevice *dev;
+    FWCfgState *fw_cfg = fw_cfg_find();
+    if (!fw_cfg) {
+        return;
+    }
+    dev = isa_create_simple (bus, TYPE_ISA_PVPANIC_DEVICE);
+    pvpanic_fw_cfg(dev, fw_cfg);
 }
 
 static Property pvpanic_isa_properties[] = {
diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index dbdd523..5949e7e 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -193,7 +193,7 @@ static inline bool isa_ne2000_init(ISABus *bus, int base, int irq, NICInfo *nd)
 void pc_system_firmware_init(MemoryRegion *rom_memory);
 
 /* pvpanic.c */
-int pvpanic_init(ISABus *bus);
+void pvpanic_init(ISABus *bus);
 
 /* e820 types */
 #define E820_RAM        1
-- 
MST

[Qemu-devel] [PULL v4 08/18] pvpanic: fix fwcfg for big endian hosts

[Michael S. Tsirkin]

Convert port number to little endian when
exposing it in fw cfg.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/misc/pvpanic.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/hw/misc/pvpanic.c b/hw/misc/pvpanic.c
index 83ed226..792d8e4 100644
--- a/hw/misc/pvpanic.c
+++ b/hw/misc/pvpanic.c
@@ -104,10 +104,11 @@ static void pvpanic_isa_realizefn(DeviceState *dev, Error **errp)
 static void pvpanic_fw_cfg(ISADevice *dev, FWCfgState *fw_cfg)
 {
     PVPanicState *s = ISA_PVPANIC_DEVICE(dev);
+    uint16_t *pvpanic_port = g_malloc(sizeof(*pvpanic_port));
+    *pvpanic_port = cpu_to_le16(s->ioport);
 
-    fw_cfg_add_file(fw_cfg, "etc/pvpanic-port",
-                    g_memdup(&s->ioport, sizeof(s->ioport)),
-                    sizeof(s->ioport));
+    fw_cfg_add_file(fw_cfg, "etc/pvpanic-port", pvpanic_port,
+                    sizeof(*pvpanic_port));
 }
 
 void pvpanic_init(ISABus *bus)
-- 
MST

[Qemu-devel] [PULL v4 09/18] pci: Cleanup configuration for pci-hotplug.c

[Michael S. Tsirkin]

From: David Gibson <david@gibson.dropbear.id.au>

pci-hotplug.c and the CONFIG_PCI_HOTPLUG variable which controls its
compilation are misnamed.  They're not about PCI hotplug in general, but
rather about the pci_add/pci_del interface which are now deprecated in
favour of the more general device_add/device_del interface.  This patch
therefore renames them to pci-hotplug-old.c and CONFIG_PCI_HOTPLUG_OLD.

CONFIG_PCI_HOTPLUG=y was listed twice in {i386,x86_64}-softmmu.make for no
particular reason, so we clean that up too.  In addition it was included in
ppc64-softmmu.mak for which the old hotplug interface was never used and is
unsuitable, so we remove that too.

Most of pci-hotplug.c was additionaly protected by #ifdef TARGET_I386.  The
small piece which wasn't is only called from the pci_add and pci_del hooks
in hmp-commands.hx, which themselves were protected by #ifdef TARGET_I386.
This patch therefore also removes the #ifdef from pci-hotplug-old.c,
and changes the ifdefs in hmp-commands.hx to use CONFIG_PCI_HOTPLUG_OLD.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 default-configs/i386-softmmu.mak            | 3 +--
 default-configs/ppc64-softmmu.mak           | 2 --
 default-configs/x86_64-softmmu.mak          | 3 +--
 hmp-commands.hx                             | 4 ++--
 hw/pci/Makefile.objs                        | 2 +-
 hw/pci/{pci-hotplug.c => pci-hotplug-old.c} | 6 +++---
 6 files changed, 8 insertions(+), 12 deletions(-)
 rename hw/pci/{pci-hotplug.c => pci-hotplug-old.c} (98%)

diff --git a/default-configs/i386-softmmu.mak b/default-configs/i386-softmmu.mak
index 03deca2..4a0fc9c 100644
--- a/default-configs/i386-softmmu.mak
+++ b/default-configs/i386-softmmu.mak
@@ -28,11 +28,10 @@ CONFIG_APPLESMC=y
 CONFIG_I8259=y
 CONFIG_PFLASH_CFI01=y
 CONFIG_TPM_TIS=$(CONFIG_TPM)
-CONFIG_PCI_HOTPLUG=y
+CONFIG_PCI_HOTPLUG_OLD=y
 CONFIG_MC146818RTC=y
 CONFIG_PAM=y
 CONFIG_PCI_PIIX=y
-CONFIG_PCI_HOTPLUG=y
 CONFIG_WDT_IB700=y
 CONFIG_PC_SYSFW=y
 CONFIG_XEN_I386=$(CONFIG_XEN)
diff --git a/default-configs/ppc64-softmmu.mak b/default-configs/ppc64-softmmu.mak
index cb279cb..5a72b5f 100644
--- a/default-configs/ppc64-softmmu.mak
+++ b/default-configs/ppc64-softmmu.mak
@@ -45,7 +45,5 @@ CONFIG_OPENPIC=y
 CONFIG_PSERIES=y
 CONFIG_E500=y
 CONFIG_OPENPIC_KVM=$(and $(CONFIG_E500),$(CONFIG_KVM))
-# For pSeries
-CONFIG_PCI_HOTPLUG=y
 # For PReP
 CONFIG_MC146818RTC=y
diff --git a/default-configs/x86_64-softmmu.mak b/default-configs/x86_64-softmmu.mak
index 599b630..10bb0c6 100644
--- a/default-configs/x86_64-softmmu.mak
+++ b/default-configs/x86_64-softmmu.mak
@@ -28,11 +28,10 @@ CONFIG_APPLESMC=y
 CONFIG_I8259=y
 CONFIG_PFLASH_CFI01=y
 CONFIG_TPM_TIS=$(CONFIG_TPM)
-CONFIG_PCI_HOTPLUG=y
+CONFIG_PCI_HOTPLUG_OLD=y
 CONFIG_MC146818RTC=y
 CONFIG_PAM=y
 CONFIG_PCI_PIIX=y
-CONFIG_PCI_HOTPLUG=y
 CONFIG_WDT_IB700=y
 CONFIG_PC_SYSFW=y
 CONFIG_XEN_I386=$(CONFIG_XEN)
diff --git a/hmp-commands.hx b/hmp-commands.hx
index 915b0d1..d1cdcfb 100644
--- a/hmp-commands.hx
+++ b/hmp-commands.hx
@@ -1077,7 +1077,7 @@ STEXI
 Add drive to PCI storage controller.
 ETEXI
 
-#if defined(TARGET_I386)
+#if defined(CONFIG_PCI_HOTPLUG_OLD)
     {
         .name       = "pci_add",
         .args_type  = "pci_addr:s,type:s,opts:s?",
@@ -1093,7 +1093,7 @@ STEXI
 Hot-add PCI device.
 ETEXI
 
-#if defined(TARGET_I386)
+#if defined(CONFIG_PCI_HOTPLUG_OLD)
     {
         .name       = "pci_del",
         .args_type  = "pci_addr:s",
diff --git a/hw/pci/Makefile.objs b/hw/pci/Makefile.objs
index a7fb9d0..720f438 100644
--- a/hw/pci/Makefile.objs
+++ b/hw/pci/Makefile.objs
@@ -8,4 +8,4 @@ common-obj-$(CONFIG_PCI) += pcie.o pcie_aer.o pcie_port.o
 common-obj-$(CONFIG_NO_PCI) += pci-stub.o
 common-obj-$(CONFIG_ALL) += pci-stub.o
 
-obj-$(CONFIG_PCI_HOTPLUG) += pci-hotplug.o
+common-obj-$(CONFIG_PCI_HOTPLUG_OLD) += pci-hotplug-old.o
diff --git a/hw/pci/pci-hotplug.c b/hw/pci/pci-hotplug-old.c
similarity index 98%
rename from hw/pci/pci-hotplug.c
rename to hw/pci/pci-hotplug-old.c
index 12287d1..b3c233c 100644
--- a/hw/pci/pci-hotplug.c
+++ b/hw/pci/pci-hotplug-old.c
@@ -1,5 +1,7 @@
 /*
- * QEMU PCI hotplug support
+ * Deprecated PCI hotplug interface support
+ * This covers the old pci_add / pci_del command, whereas the more general
+ * device_add / device_del commands are now preferred.
  *
  * Copyright (c) 2004 Fabrice Bellard
  *
@@ -34,7 +36,6 @@
 #include "sysemu/blockdev.h"
 #include "qapi/error.h"
 
-#if defined(TARGET_I386)
 static PCIDevice *qemu_pci_hot_add_nic(Monitor *mon,
                                        const char *devaddr,
                                        const char *opts_str)
@@ -257,7 +258,6 @@ void pci_device_hot_add(Monitor *mon, const QDict *qdict)
     } else
         monitor_printf(mon, "failed to add %s\n", opts);
 }
-#endif
 
 static int pci_device_hot_remove(Monitor *mon, const char *pci_addr)
 {
-- 
MST

[Qemu-devel] [PULL v4 10/18] pci: Move pci_read_devaddr to pci-hotplug-old.c

[Michael S. Tsirkin]

From: David Gibson <david@gibson.dropbear.id.au>

pci_read_devaddr() is only used by the legacy functions for the old PCI
hotplug interface in pci-hotplug-old.c.  So we move the function there,
and make it static.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/pci/pci-hotplug-old.c | 14 ++++++++++++++
 hw/pci/pci.c             | 16 +---------------
 include/hw/pci/pci.h     |  4 ++--
 3 files changed, 17 insertions(+), 17 deletions(-)

diff --git a/hw/pci/pci-hotplug-old.c b/hw/pci/pci-hotplug-old.c
index b3c233c..a0b5558 100644
--- a/hw/pci/pci-hotplug-old.c
+++ b/hw/pci/pci-hotplug-old.c
@@ -36,6 +36,20 @@
 #include "sysemu/blockdev.h"
 #include "qapi/error.h"
 
+static int pci_read_devaddr(Monitor *mon, const char *addr, int *domp,
+                            int *busp, unsigned *slotp)
+{
+    /* strip legacy tag */
+    if (!strncmp(addr, "pci_addr=", 9)) {
+        addr += 9;
+    }
+    if (pci_parse_devaddr(addr, domp, busp, slotp, NULL)) {
+        monitor_printf(mon, "Invalid pci address\n");
+        return -1;
+    }
+    return 0;
+}
+
 static PCIDevice *qemu_pci_hot_add_nic(Monitor *mon,
                                        const char *devaddr,
                                        const char *opts_str)
diff --git a/hw/pci/pci.c b/hw/pci/pci.c
index 61b681a..adf4da5 100644
--- a/hw/pci/pci.c
+++ b/hw/pci/pci.c
@@ -522,7 +522,7 @@ static void pci_set_default_subsystem_id(PCIDevice *pci_dev)
  * Parse [[<domain>:]<bus>:]<slot>, return -1 on error if funcp == NULL
  *       [[<domain>:]<bus>:]<slot>.<func>, return -1 on error
  */
-static int pci_parse_devaddr(const char *addr, int *domp, int *busp,
+int pci_parse_devaddr(const char *addr, int *domp, int *busp,
                       unsigned int *slotp, unsigned int *funcp)
 {
     const char *p;
@@ -581,20 +581,6 @@ static int pci_parse_devaddr(const char *addr, int *domp, int *busp,
     return 0;
 }
 
-int pci_read_devaddr(Monitor *mon, const char *addr, int *domp, int *busp,
-                     unsigned *slotp)
-{
-    /* strip legacy tag */
-    if (!strncmp(addr, "pci_addr=", 9)) {
-        addr += 9;
-    }
-    if (pci_parse_devaddr(addr, domp, busp, slotp, NULL)) {
-        monitor_printf(mon, "Invalid pci address\n");
-        return -1;
-    }
-    return 0;
-}
-
 PCIBus *pci_get_bus_devfn(int *devfnp, const char *devaddr)
 {
     int dom, bus;
diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h
index 6ef1f97..b5edef8 100644
--- a/include/hw/pci/pci.h
+++ b/include/hw/pci/pci.h
@@ -395,8 +395,8 @@ PCIDevice *pci_find_device(PCIBus *bus, int bus_num, uint8_t devfn);
 int pci_qdev_find_device(const char *id, PCIDevice **pdev);
 PCIBus *pci_get_bus_devfn(int *devfnp, const char *devaddr);
 
-int pci_read_devaddr(Monitor *mon, const char *addr, int *domp, int *busp,
-                     unsigned *slotp);
+int pci_parse_devaddr(const char *addr, int *domp, int *busp,
+                      unsigned int *slotp, unsigned int *funcp);
 
 void pci_device_deassert_intx(PCIDevice *dev);
 
-- 
MST

[Qemu-devel] [PULL v4 11/18] pci: Abolish pci_find_root_bus()

[Michael S. Tsirkin]

From: David Gibson <david@gibson.dropbear.id.au>

pci_find_root_bus() takes a domain parameter.  Currently PCI root buses
with domain other than 0 can't be created, so this is more or less a long
winded way of retrieving the main PCI root bus.  Numbered domains don't
actually properly cover the (non x86) possibilities for multiple PCI root
buses, so this patch for now enforces the domain == 0 restriction in other
places to replace pci_find_root_bus() with an explicit
pci_find_primary_bus().

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/i386/pc_piix.c        |  2 +-
 hw/pci/pci-hotplug-old.c | 34 +++++++++++++++++++++++++---------
 hw/pci/pci.c             | 19 +++++++++++++++----
 include/hw/pci/pci.h     |  2 +-
 4 files changed, 42 insertions(+), 15 deletions(-)

diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index e393022..0276694 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -342,7 +342,7 @@ static void pc_xen_hvm_init(QEMUMachineInitArgs *args)
 
     pc_init_pci(args);
 
-    bus = pci_find_root_bus(0);
+    bus = pci_find_primary_bus();
     if (bus != NULL) {
         pci_create_simple(bus, -1, "xen-platform");
     }
diff --git a/hw/pci/pci-hotplug-old.c b/hw/pci/pci-hotplug-old.c
index a0b5558..7a47d6b 100644
--- a/hw/pci/pci-hotplug-old.c
+++ b/hw/pci/pci-hotplug-old.c
@@ -36,17 +36,23 @@
 #include "sysemu/blockdev.h"
 #include "qapi/error.h"
 
-static int pci_read_devaddr(Monitor *mon, const char *addr, int *domp,
+static int pci_read_devaddr(Monitor *mon, const char *addr,
                             int *busp, unsigned *slotp)
 {
+    int dom;
+
     /* strip legacy tag */
     if (!strncmp(addr, "pci_addr=", 9)) {
         addr += 9;
     }
-    if (pci_parse_devaddr(addr, domp, busp, slotp, NULL)) {
+    if (pci_parse_devaddr(addr, &dom, busp, slotp, NULL)) {
         monitor_printf(mon, "Invalid pci address\n");
         return -1;
     }
+    if (dom != 0) {
+        monitor_printf(mon, "Multiple PCI domains not supported, use device_add\n");
+        return -1;
+    }
     return 0;
 }
 
@@ -128,18 +134,22 @@ static int scsi_hot_add(Monitor *mon, DeviceState *adapter,
 
 int pci_drive_hot_add(Monitor *mon, const QDict *qdict, DriveInfo *dinfo)
 {
-    int dom, pci_bus;
+    int pci_bus;
     unsigned slot;
+    PCIBus *root = pci_find_primary_bus();
     PCIDevice *dev;
     const char *pci_addr = qdict_get_str(qdict, "pci_addr");
 
     switch (dinfo->type) {
     case IF_SCSI:
-        if (pci_read_devaddr(mon, pci_addr, &dom, &pci_bus, &slot)) {
+        if (!root) {
+            monitor_printf(mon, "no primary PCI bus\n");
+            goto err;
+        }
+        if (pci_read_devaddr(mon, pci_addr, &pci_bus, &slot)) {
             goto err;
         }
-        dev = pci_find_device(pci_find_root_bus(dom), pci_bus,
-                              PCI_DEVFN(slot, 0));
+        dev = pci_find_device(root, pci_bus, PCI_DEVFN(slot, 0));
         if (!dev) {
             monitor_printf(mon, "no pci device with address %s\n", pci_addr);
             goto err;
@@ -275,16 +285,22 @@ void pci_device_hot_add(Monitor *mon, const QDict *qdict)
 
 static int pci_device_hot_remove(Monitor *mon, const char *pci_addr)
 {
+    PCIBus *root = pci_find_primary_bus();
     PCIDevice *d;
-    int dom, bus;
+    int bus;
     unsigned slot;
     Error *local_err = NULL;
 
-    if (pci_read_devaddr(mon, pci_addr, &dom, &bus, &slot)) {
+    if (!root) {
+        monitor_printf(mon, "no primary PCI bus\n");
+        return -1;
+    }
+
+    if (pci_read_devaddr(mon, pci_addr, &bus, &slot)) {
         return -1;
     }
 
-    d = pci_find_device(pci_find_root_bus(dom), bus, PCI_DEVFN(slot, 0));
+    d = pci_find_device(root, bus, PCI_DEVFN(slot, 0));
     if (!d) {
         monitor_printf(mon, "slot %d empty\n", slot);
         return -1;
diff --git a/hw/pci/pci.c b/hw/pci/pci.c
index adf4da5..fc99e3b 100644
--- a/hw/pci/pci.c
+++ b/hw/pci/pci.c
@@ -246,12 +246,12 @@ static void pci_host_bus_register(int domain, PCIBus *bus)
     QLIST_INSERT_HEAD(&host_buses, host, next);
 }
 
-PCIBus *pci_find_root_bus(int domain)
+PCIBus *pci_find_primary_bus(void)
 {
     struct PCIHostBus *host;
 
     QLIST_FOREACH(host, &host_buses, next) {
-        if (host->domain == domain) {
+        if (host->domain == 0) {
             return host->bus;
         }
     }
@@ -583,20 +583,31 @@ int pci_parse_devaddr(const char *addr, int *domp, int *busp,
 
 PCIBus *pci_get_bus_devfn(int *devfnp, const char *devaddr)
 {
+    PCIBus *root = pci_find_primary_bus();
     int dom, bus;
     unsigned slot;
 
+    if (!root) {
+        fprintf(stderr, "No primary PCI bus\n");
+        return NULL;
+    }
+
     if (!devaddr) {
         *devfnp = -1;
-        return pci_find_bus_nr(pci_find_root_bus(0), 0);
+        return pci_find_bus_nr(root, 0);
     }
 
     if (pci_parse_devaddr(devaddr, &dom, &bus, &slot, NULL) < 0) {
         return NULL;
     }
 
+    if (dom != 0) {
+        fprintf(stderr, "No support for non-zero PCI domains\n");
+        return NULL;
+    }
+
     *devfnp = PCI_DEVFN(slot, 0);
-    return pci_find_bus_nr(pci_find_root_bus(dom), bus);
+    return pci_find_bus_nr(root, bus);
 }
 
 static void pci_init_cmask(PCIDevice *dev)
diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h
index b5edef8..7b89d88 100644
--- a/include/hw/pci/pci.h
+++ b/include/hw/pci/pci.h
@@ -389,7 +389,7 @@ int pci_bus_num(PCIBus *s);
 void pci_for_each_device(PCIBus *bus, int bus_num,
                          void (*fn)(PCIBus *bus, PCIDevice *d, void *opaque),
                          void *opaque);
-PCIBus *pci_find_root_bus(int domain);
+PCIBus *pci_find_primary_bus(void);
 int pci_find_domain(const PCIBus *bus);
 PCIDevice *pci_find_device(PCIBus *bus, int bus_num, uint8_t devfn);
 int pci_qdev_find_device(const char *id, PCIDevice **pdev);
-- 
MST

[Qemu-devel] [PULL v4 12/18] pci: Use helper to find device's root bus in pci_find_domain()

[Michael S. Tsirkin]

From: David Gibson <david@gibson.dropbear.id.au>

Currently pci_find_domain() performs two functions - it locates the PCI
root bus above the given bus, then looks up that root bus's domain number.
This patch adds a helper function to perform the first task, finding the
root bus for a given PCI device.  This is then used in pci_find_domain().
This changes pci_find_domain()'s signature slightly, taking a PCIDevice
instead of a PCIBus - since all callers passed something of the form
dev->bus, this simplifies things slightly.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/pci/pci-hotplug-old.c |  2 +-
 hw/pci/pci.c             | 20 +++++++++++++-------
 hw/pci/pcie_aer.c        |  3 +--
 include/hw/pci/pci.h     |  3 ++-
 4 files changed, 17 insertions(+), 11 deletions(-)

diff --git a/hw/pci/pci-hotplug-old.c b/hw/pci/pci-hotplug-old.c
index 7a47d6b..37e0720 100644
--- a/hw/pci/pci-hotplug-old.c
+++ b/hw/pci/pci-hotplug-old.c
@@ -276,7 +276,7 @@ void pci_device_hot_add(Monitor *mon, const QDict *qdict)
 
     if (dev) {
         monitor_printf(mon, "OK domain %d, bus %d, slot %d, function %d\n",
-                       pci_find_domain(dev->bus),
+                       pci_find_domain(dev),
                        pci_bus_num(dev->bus), PCI_SLOT(dev->devfn),
                        PCI_FUNC(dev->devfn));
     } else
diff --git a/hw/pci/pci.c b/hw/pci/pci.c
index fc99e3b..69a6995 100644
--- a/hw/pci/pci.c
+++ b/hw/pci/pci.c
@@ -259,18 +259,24 @@ PCIBus *pci_find_primary_bus(void)
     return NULL;
 }
 
-int pci_find_domain(const PCIBus *bus)
+PCIBus *pci_device_root_bus(const PCIDevice *d)
 {
-    PCIDevice *d;
-    struct PCIHostBus *host;
+    PCIBus *bus = d->bus;
 
-    /* obtain root bus */
     while ((d = bus->parent_dev) != NULL) {
         bus = d->bus;
     }
 
+    return bus;
+}
+
+int pci_find_domain(const PCIDevice *dev)
+{
+    const PCIBus *rootbus = pci_device_root_bus(dev);
+    struct PCIHostBus *host;
+
     QLIST_FOREACH(host, &host_buses, next) {
-        if (host->bus == bus) {
+        if (host->bus == rootbus) {
             return host->domain;
         }
     }
@@ -1997,7 +2003,7 @@ int pci_add_capability(PCIDevice *pdev, uint8_t cap_id,
                 fprintf(stderr, "ERROR: %04x:%02x:%02x.%x "
                         "Attempt to add PCI capability %x at offset "
                         "%x overlaps existing capability %x at offset %x\n",
-                        pci_find_domain(pdev->bus), pci_bus_num(pdev->bus),
+                        pci_find_domain(pdev), pci_bus_num(pdev->bus),
                         PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn),
                         cap_id, offset, overlapping_cap, i);
                 return -EINVAL;
@@ -2152,7 +2158,7 @@ static char *pcibus_get_dev_path(DeviceState *dev)
     path[path_len] = '\0';
 
     /* First field is the domain. */
-    s = snprintf(domain, sizeof domain, "%04x:00", pci_find_domain(d->bus));
+    s = snprintf(domain, sizeof domain, "%04x:00", pci_find_domain(d));
     assert(s == domain_len);
     memcpy(path, domain, domain_len);
 
diff --git a/hw/pci/pcie_aer.c b/hw/pci/pcie_aer.c
index 1ce72ce..06f77ac 100644
--- a/hw/pci/pcie_aer.c
+++ b/hw/pci/pcie_aer.c
@@ -1022,8 +1022,7 @@ int do_pcie_aer_inject_error(Monitor *mon,
     *ret_data = qobject_from_jsonf("{'id': %s, "
                                    "'domain': %d, 'bus': %d, 'devfn': %d, "
                                    "'ret': %d}",
-                                   id,
-                                   pci_find_domain(dev->bus),
+                                   id, pci_find_domain(dev),
                                    pci_bus_num(dev->bus), dev->devfn,
                                    ret);
     assert(*ret_data);
diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h
index 7b89d88..f2bf1ed 100644
--- a/include/hw/pci/pci.h
+++ b/include/hw/pci/pci.h
@@ -390,7 +390,8 @@ void pci_for_each_device(PCIBus *bus, int bus_num,
                          void (*fn)(PCIBus *bus, PCIDevice *d, void *opaque),
                          void *opaque);
 PCIBus *pci_find_primary_bus(void);
-int pci_find_domain(const PCIBus *bus);
+PCIBus *pci_device_root_bus(const PCIDevice *d);
+int pci_find_domain(const PCIDevice *dev);
 PCIDevice *pci_find_device(PCIBus *bus, int bus_num, uint8_t devfn);
 int pci_qdev_find_device(const char *id, PCIDevice **pdev);
 PCIBus *pci_get_bus_devfn(int *devfnp, const char *devaddr);
-- 
MST

[Qemu-devel] [PULL v4 13/18] pci: Replace pci_find_domain() with more general pci_root_bus_path()

[Michael S. Tsirkin]

From: David Gibson <david@gibson.dropbear.id.au>

pci_find_domain() is used in a number of places where we want an id for a
whole PCI domain (i.e. the subtree under a PCI root bus).  The trouble is
that many platforms may support multiple independent host bridges with no
hardware supplied notion of domain number.

This patch, therefore, replaces calls to pci_find_domain() with calls to
a new pci_root_bus_path() returning a string.  The new call is implemented
in terms of a new callback in the host bridge class, so it can be defined
in some way that's well defined for the platform.  When no callback is
available we fall back on the qbus name.

Most current uses of pci_find_domain() are for error or informational
messages, so the change in identifiers should be harmless.  The exception
is pci_get_dev_path(), whose results form part of migration streams.  To
maintain compatibility with old migration streams, the PIIX PCI host is
altered to always supply "0000" for this path, which matches the old domain
number (since the code didn't actually support domains other than 0).

For the pseries (spapr) PCI bridge we use a different platform-unique
identifier (pseries machines can routinely have dozens of PCI host
bridges).  Theoretically that breaks migration streams, but given that we
don't yet have migration support for pseries, it doesn't matter.

Any other machines that have working migration support including PCI
devices will need to be updated to maintain migration stream compatibility.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/pci-host/piix.c        |  9 +++++++++
 hw/pci-host/q35.c         |  9 +++++++++
 hw/pci/pci-hotplug-old.c  |  4 ++--
 hw/pci/pci.c              | 38 ++++++++++++++++++++------------------
 hw/pci/pci_host.c         |  1 +
 hw/pci/pcie_aer.c         |  8 ++++----
 hw/ppc/spapr_pci.c        | 10 ++++++++++
 include/hw/pci/pci.h      |  2 +-
 include/hw/pci/pci_host.h | 10 ++++++++++
 9 files changed, 66 insertions(+), 25 deletions(-)

diff --git a/hw/pci-host/piix.c b/hw/pci-host/piix.c
index f9e68c3..c36e725 100644
--- a/hw/pci-host/piix.c
+++ b/hw/pci-host/piix.c
@@ -629,11 +629,20 @@ static const TypeInfo i440fx_info = {
     .class_init    = i440fx_class_init,
 };
 
+static const char *i440fx_pcihost_root_bus_path(PCIHostState *host_bridge,
+                                                PCIBus *rootbus)
+{
+    /* For backwards compat with old device paths */
+    return "0000";
+}
+
 static void i440fx_pcihost_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
+    PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_CLASS(klass);
 
+    hc->root_bus_path = i440fx_pcihost_root_bus_path;
     k->init = i440fx_pcihost_initfn;
     dc->fw_name = "pci";
     dc->no_user = 1;
diff --git a/hw/pci-host/q35.c b/hw/pci-host/q35.c
index 3a5cff9..13148ed 100644
--- a/hw/pci-host/q35.c
+++ b/hw/pci-host/q35.c
@@ -63,6 +63,13 @@ static int q35_host_init(SysBusDevice *dev)
     return 0;
 }
 
+static const char *q35_host_root_bus_path(PCIHostState *host_bridge,
+                                          PCIBus *rootbus)
+{
+    /* For backwards compat with old device paths */
+    return "0000";
+}
+
 static Property mch_props[] = {
     DEFINE_PROP_UINT64("MCFG", Q35PCIHost, host.base_addr,
                         MCH_HOST_BRIDGE_PCIEXBAR_DEFAULT),
@@ -73,7 +80,9 @@ static void q35_host_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
+    PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_CLASS(klass);
 
+    hc->root_bus_path = q35_host_root_bus_path;
     k->init = q35_host_init;
     dc->props = mch_props;
     dc->fw_name = "pci";
diff --git a/hw/pci/pci-hotplug-old.c b/hw/pci/pci-hotplug-old.c
index 37e0720..e251810 100644
--- a/hw/pci/pci-hotplug-old.c
+++ b/hw/pci/pci-hotplug-old.c
@@ -275,8 +275,8 @@ void pci_device_hot_add(Monitor *mon, const QDict *qdict)
     }
 
     if (dev) {
-        monitor_printf(mon, "OK domain %d, bus %d, slot %d, function %d\n",
-                       pci_find_domain(dev),
+        monitor_printf(mon, "OK root bus %s, bus %d, slot %d, function %d\n",
+                       pci_root_bus_path(dev),
                        pci_bus_num(dev->bus), PCI_SLOT(dev->devfn),
                        PCI_FUNC(dev->devfn));
     } else
diff --git a/hw/pci/pci.c b/hw/pci/pci.c
index 69a6995..350b872 100644
--- a/hw/pci/pci.c
+++ b/hw/pci/pci.c
@@ -25,6 +25,7 @@
 #include "hw/pci/pci.h"
 #include "hw/pci/pci_bridge.h"
 #include "hw/pci/pci_bus.h"
+#include "hw/pci/pci_host.h"
 #include "monitor/monitor.h"
 #include "net/net.h"
 #include "sysemu/sysemu.h"
@@ -270,19 +271,20 @@ PCIBus *pci_device_root_bus(const PCIDevice *d)
     return bus;
 }
 
-int pci_find_domain(const PCIDevice *dev)
+const char *pci_root_bus_path(PCIDevice *dev)
 {
-    const PCIBus *rootbus = pci_device_root_bus(dev);
-    struct PCIHostBus *host;
+    PCIBus *rootbus = pci_device_root_bus(dev);
+    PCIHostState *host_bridge = PCI_HOST_BRIDGE(rootbus->qbus.parent);
+    PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_GET_CLASS(host_bridge);
 
-    QLIST_FOREACH(host, &host_buses, next) {
-        if (host->bus == rootbus) {
-            return host->domain;
-        }
+    assert(!rootbus->parent_dev);
+    assert(host_bridge->bus == rootbus);
+
+    if (hc->root_bus_path) {
+        return (*hc->root_bus_path)(host_bridge, rootbus);
     }
 
-    abort();    /* should not be reached */
-    return -1;
+    return rootbus->qbus.name;
 }
 
 static void pci_bus_init(PCIBus *bus, DeviceState *parent,
@@ -2000,10 +2002,10 @@ int pci_add_capability(PCIDevice *pdev, uint8_t cap_id,
         for (i = offset; i < offset + size; i++) {
             overlapping_cap = pci_find_capability_at_offset(pdev, i);
             if (overlapping_cap) {
-                fprintf(stderr, "ERROR: %04x:%02x:%02x.%x "
+                fprintf(stderr, "ERROR: %s:%02x:%02x.%x "
                         "Attempt to add PCI capability %x at offset "
                         "%x overlaps existing capability %x at offset %x\n",
-                        pci_find_domain(pdev), pci_bus_num(pdev->bus),
+                        pci_root_bus_path(pdev), pci_bus_num(pdev->bus),
                         PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn),
                         cap_id, offset, overlapping_cap, i);
                 return -EINVAL;
@@ -2137,30 +2139,30 @@ static char *pcibus_get_dev_path(DeviceState *dev)
      * domain:Bus:Slot.Func for systems without nested PCI bridges.
      * Slot.Function list specifies the slot and function numbers for all
      * devices on the path from root to the specific device. */
-    char domain[] = "DDDD:00";
+    const char *root_bus_path;
+    int root_bus_len;
     char slot[] = ":SS.F";
-    int domain_len = sizeof domain - 1 /* For '\0' */;
     int slot_len = sizeof slot - 1 /* For '\0' */;
     int path_len;
     char *path, *p;
     int s;
 
+    root_bus_path = pci_root_bus_path(d);
+    root_bus_len = strlen(root_bus_path);
+
     /* Calculate # of slots on path between device and root. */;
     slot_depth = 0;
     for (t = d; t; t = t->bus->parent_dev) {
         ++slot_depth;
     }
 
-    path_len = domain_len + slot_len * slot_depth;
+    path_len = root_bus_len + slot_len * slot_depth;
 
     /* Allocate memory, fill in the terminating null byte. */
     path = g_malloc(path_len + 1 /* For '\0' */);
     path[path_len] = '\0';
 
-    /* First field is the domain. */
-    s = snprintf(domain, sizeof domain, "%04x:00", pci_find_domain(d));
-    assert(s == domain_len);
-    memcpy(path, domain, domain_len);
+    memcpy(path, root_bus_path, root_bus_len);
 
     /* Fill in slot numbers. We walk up from device to root, so need to print
      * them in the reverse order, last to first. */
diff --git a/hw/pci/pci_host.c b/hw/pci/pci_host.c
index 12254b1..7dd9b25 100644
--- a/hw/pci/pci_host.c
+++ b/hw/pci/pci_host.c
@@ -169,6 +169,7 @@ static const TypeInfo pci_host_type_info = {
     .name = TYPE_PCI_HOST_BRIDGE,
     .parent = TYPE_SYS_BUS_DEVICE,
     .abstract = true,
+    .class_size = sizeof(PCIHostBridgeClass),
     .instance_size = sizeof(PCIHostState),
 };
 
diff --git a/hw/pci/pcie_aer.c b/hw/pci/pcie_aer.c
index 06f77ac..ca762ab 100644
--- a/hw/pci/pcie_aer.c
+++ b/hw/pci/pcie_aer.c
@@ -817,9 +817,9 @@ void pcie_aer_inject_error_print(Monitor *mon, const QObject *data)
     qdict = qobject_to_qdict(data);
 
     devfn = (int)qdict_get_int(qdict, "devfn");
-    monitor_printf(mon, "OK id: %s domain: %x, bus: %x devfn: %x.%x\n",
+    monitor_printf(mon, "OK id: %s root bus: %s, bus: %x devfn: %x.%x\n",
                    qdict_get_str(qdict, "id"),
-                   (int) qdict_get_int(qdict, "domain"),
+                   qdict_get_str(qdict, "root_bus"),
                    (int) qdict_get_int(qdict, "bus"),
                    PCI_SLOT(devfn), PCI_FUNC(devfn));
 }
@@ -1020,9 +1020,9 @@ int do_pcie_aer_inject_error(Monitor *mon,
 
     ret = pcie_aer_inject_error(dev, &err);
     *ret_data = qobject_from_jsonf("{'id': %s, "
-                                   "'domain': %d, 'bus': %d, 'devfn': %d, "
+                                   "'root_bus': %s, 'bus': %d, 'devfn': %d, "
                                    "'ret': %d}",
-                                   id, pci_find_domain(dev),
+                                   id, pci_root_bus_path(dev),
                                    pci_bus_num(dev->bus), dev->devfn,
                                    ret);
     assert(*ret_data);
diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c
index c8c12c8..f7be24c 100644
--- a/hw/ppc/spapr_pci.c
+++ b/hw/ppc/spapr_pci.c
@@ -696,11 +696,21 @@ static Property spapr_phb_properties[] = {
     DEFINE_PROP_END_OF_LIST(),
 };
 
+static const char *spapr_phb_root_bus_path(PCIHostState *host_bridge,
+                                           PCIBus *rootbus)
+{
+    sPAPRPHBState *sphb = SPAPR_PCI_HOST_BRIDGE(host_bridge);
+
+    return sphb->dtbusname;
+}
+
 static void spapr_phb_class_init(ObjectClass *klass, void *data)
 {
+    PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_CLASS(klass);
     SysBusDeviceClass *sdc = SYS_BUS_DEVICE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
 
+    hc->root_bus_path = spapr_phb_root_bus_path;
     sdc->init = spapr_phb_init;
     dc->props = spapr_phb_properties;
     dc->reset = spapr_phb_reset;
diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h
index f2bf1ed..e0597b7 100644
--- a/include/hw/pci/pci.h
+++ b/include/hw/pci/pci.h
@@ -391,7 +391,7 @@ void pci_for_each_device(PCIBus *bus, int bus_num,
                          void *opaque);
 PCIBus *pci_find_primary_bus(void);
 PCIBus *pci_device_root_bus(const PCIDevice *d);
-int pci_find_domain(const PCIDevice *dev);
+const char *pci_root_bus_path(PCIDevice *dev);
 PCIDevice *pci_find_device(PCIBus *bus, int bus_num, uint8_t devfn);
 int pci_qdev_find_device(const char *id, PCIDevice **pdev);
 PCIBus *pci_get_bus_devfn(int *devfnp, const char *devaddr);
diff --git a/include/hw/pci/pci_host.h b/include/hw/pci/pci_host.h
index 236cd0f..44052f2 100644
--- a/include/hw/pci/pci_host.h
+++ b/include/hw/pci/pci_host.h
@@ -33,6 +33,10 @@
 #define TYPE_PCI_HOST_BRIDGE "pci-host-bridge"
 #define PCI_HOST_BRIDGE(obj) \
     OBJECT_CHECK(PCIHostState, (obj), TYPE_PCI_HOST_BRIDGE)
+#define PCI_HOST_BRIDGE_CLASS(klass) \
+     OBJECT_CLASS_CHECK(PCIHostBridgeClass, (klass), TYPE_PCI_HOST_BRIDGE)
+#define PCI_HOST_BRIDGE_GET_CLASS(obj) \
+     OBJECT_GET_CLASS(PCIHostBridgeClass, (obj), TYPE_PCI_HOST_BRIDGE)
 
 struct PCIHostState {
     SysBusDevice busdev;
@@ -44,6 +48,12 @@ struct PCIHostState {
     PCIBus *bus;
 };
 
+typedef struct PCIHostBridgeClass {
+    SysBusDeviceClass parent_class;
+
+    const char *(*root_bus_path)(PCIHostState *, PCIBus *);
+} PCIHostBridgeClass;
+
 /* common internal helpers for PCI/PCIe hosts, cut off overflows */
 void pci_host_config_write_common(PCIDevice *pci_dev, uint32_t addr,
                                   uint32_t limit, uint32_t val, uint32_t len);
-- 
MST

[Qemu-devel] [PULL v4 14/18] pci: Add root bus argument to pci_get_bus_devfn()

[Michael S. Tsirkin]

From: David Gibson <david@gibson.dropbear.id.au>

pci_get_bus_devfn() interprets a full PCI address string to give a PCIBus *
and device/function number within that bus.  Currently it assumes it is
working on an address under the primary PCI root bus.  This patch extends
it to allow the caller to specify a root bus.  This might seem a little odd
since the supplied address can (theoretically) include a PCI domain number.
However, attempting to use a non-zero domain number there is currently an
error, so that shouldn't really cause problems.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/pci/pci-hotplug-old.c | 4 ++--
 hw/pci/pci.c             | 7 ++++---
 include/hw/pci/pci.h     | 2 +-
 3 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/hw/pci/pci-hotplug-old.c b/hw/pci/pci-hotplug-old.c
index e251810..e92d646 100644
--- a/hw/pci/pci-hotplug-old.c
+++ b/hw/pci/pci-hotplug-old.c
@@ -65,7 +65,7 @@ static PCIDevice *qemu_pci_hot_add_nic(Monitor *mon,
     PCIBus *bus;
     int ret, devfn;
 
-    bus = pci_get_bus_devfn(&devfn, devaddr);
+    bus = pci_get_bus_devfn(&devfn, pci_find_primary_bus(), devaddr);
     if (!bus) {
         monitor_printf(mon, "Invalid PCI device address %s\n", devaddr);
         return NULL;
@@ -205,7 +205,7 @@ static PCIDevice *qemu_pci_hot_add_storage(Monitor *mon,
         dinfo = NULL;
     }
 
-    bus = pci_get_bus_devfn(&devfn, devaddr);
+    bus = pci_get_bus_devfn(&devfn, pci_find_primary_bus(), devaddr);
     if (!bus) {
         monitor_printf(mon, "Invalid PCI device address %s\n", devaddr);
         return NULL;
diff --git a/hw/pci/pci.c b/hw/pci/pci.c
index 350b872..c4f63ad 100644
--- a/hw/pci/pci.c
+++ b/hw/pci/pci.c
@@ -589,12 +589,13 @@ int pci_parse_devaddr(const char *addr, int *domp, int *busp,
     return 0;
 }
 
-PCIBus *pci_get_bus_devfn(int *devfnp, const char *devaddr)
+PCIBus *pci_get_bus_devfn(int *devfnp, PCIBus *root, const char *devaddr)
 {
-    PCIBus *root = pci_find_primary_bus();
     int dom, bus;
     unsigned slot;
 
+    assert(!root->parent_dev);
+
     if (!root) {
         fprintf(stderr, "No primary PCI bus\n");
         return NULL;
@@ -1588,7 +1589,7 @@ PCIDevice *pci_nic_init(NICInfo *nd, const char *default_model,
     if (i < 0)
         return NULL;
 
-    bus = pci_get_bus_devfn(&devfn, devaddr);
+    bus = pci_get_bus_devfn(&devfn, pci_find_primary_bus(), devaddr);
     if (!bus) {
         error_report("Invalid PCI device address %s for device %s",
                      devaddr, pci_nic_names[i]);
diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h
index e0597b7..3a43fba 100644
--- a/include/hw/pci/pci.h
+++ b/include/hw/pci/pci.h
@@ -394,7 +394,7 @@ PCIBus *pci_device_root_bus(const PCIDevice *d);
 const char *pci_root_bus_path(PCIDevice *dev);
 PCIDevice *pci_find_device(PCIBus *bus, int bus_num, uint8_t devfn);
 int pci_qdev_find_device(const char *id, PCIDevice **pdev);
-PCIBus *pci_get_bus_devfn(int *devfnp, const char *devaddr);
+PCIBus *pci_get_bus_devfn(int *devfnp, PCIBus *root, const char *devaddr);
 
 int pci_parse_devaddr(const char *addr, int *domp, int *busp,
                       unsigned int *slotp, unsigned int *funcp);
-- 
MST

[Qemu-devel] [PULL v4 15/18] pci: Add root bus parameter to pci_nic_init()

[Michael S. Tsirkin]

From: David Gibson <david@gibson.dropbear.id.au>

At present, pci_nic_init() and pci_nic_init_nofail() assume that they will
only create a NIC under the primary PCI root.  As we add support for
multiple PCI roots, that may no longer be the case.  This patch adds a root
bus parameter to pci_nic_init() (and updates callers accordingly) to allow
the machine init code using it to specify the right PCI root for NICs
created by old-style -net nic parameters.  NICs created new-style, with
-device can of course be put anywhere.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/alpha/dp264.c         |  2 +-
 hw/arm/realview.c        |  6 ++++--
 hw/arm/versatilepb.c     |  2 +-
 hw/i386/pc.c             |  2 +-
 hw/mips/mips_fulong2e.c  |  6 +++---
 hw/mips/mips_malta.c     |  6 +++---
 hw/pci/pci-hotplug-old.c |  3 ++-
 hw/pci/pci.c             | 10 ++++++----
 hw/ppc/e500.c            |  2 +-
 hw/ppc/mac_newworld.c    |  2 +-
 hw/ppc/mac_oldworld.c    |  2 +-
 hw/ppc/ppc440_bamboo.c   |  2 +-
 hw/ppc/prep.c            |  2 +-
 hw/ppc/spapr.c           |  2 +-
 hw/sh4/r2d.c             |  5 ++++-
 hw/sparc64/sun4u.c       |  2 +-
 include/hw/pci/pci.h     |  6 ++++--
 17 files changed, 36 insertions(+), 26 deletions(-)

diff --git a/hw/alpha/dp264.c b/hw/alpha/dp264.c
index 8695efb..8dad08f 100644
--- a/hw/alpha/dp264.c
+++ b/hw/alpha/dp264.c
@@ -89,7 +89,7 @@ static void clipper_init(QEMUMachineInitArgs *args)
 
     /* Network setup.  e1000 is good enough, failing Tulip support.  */
     for (i = 0; i < nb_nics; i++) {
-        pci_nic_init_nofail(&nd_table[i], "e1000", NULL);
+        pci_nic_init_nofail(&nd_table[i], pci_bus, "e1000", NULL);
     }
 
     /* IDE disk setup.  */
diff --git a/hw/arm/realview.c b/hw/arm/realview.c
index d6f47bf..036a188 100644
--- a/hw/arm/realview.c
+++ b/hw/arm/realview.c
@@ -59,7 +59,7 @@ static void realview_init(QEMUMachineInitArgs *args,
     qemu_irq *irqp;
     qemu_irq pic[64];
     qemu_irq mmc_irq[2];
-    PCIBus *pci_bus;
+    PCIBus *pci_bus = NULL;
     NICInfo *nd;
     i2c_bus *i2c;
     int n;
@@ -250,7 +250,9 @@ static void realview_init(QEMUMachineInitArgs *args,
             }
             done_nic = 1;
         } else {
-            pci_nic_init_nofail(nd, "rtl8139", NULL);
+            if (pci_bus) {
+                pci_nic_init_nofail(nd, pci_bus, "rtl8139", NULL);
+            }
         }
     }
 
diff --git a/hw/arm/versatilepb.c b/hw/arm/versatilepb.c
index 753757e..15eb086 100644
--- a/hw/arm/versatilepb.c
+++ b/hw/arm/versatilepb.c
@@ -244,7 +244,7 @@ static void versatile_init(QEMUMachineInitArgs *args, int board_id)
             smc91c111_init(nd, 0x10010000, sic[25]);
             done_smc = 1;
         } else {
-            pci_nic_init_nofail(nd, "rtl8139", NULL);
+            pci_nic_init_nofail(nd, pci_bus, "rtl8139", NULL);
         }
     }
     if (usb_enabled(false)) {
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 7c4794c..80c27d6 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -1310,7 +1310,7 @@ void pc_nic_init(ISABus *isa_bus, PCIBus *pci_bus)
         if (!pci_bus || (nd->model && strcmp(nd->model, "ne2k_isa") == 0)) {
             pc_init_ne2k_isa(isa_bus, nd);
         } else {
-            pci_nic_init_nofail(nd, "e1000", NULL);
+            pci_nic_init_nofail(nd, pci_bus, "e1000", NULL);
         }
     }
 }
diff --git a/hw/mips/mips_fulong2e.c b/hw/mips/mips_fulong2e.c
index 00c9071..db67966 100644
--- a/hw/mips/mips_fulong2e.c
+++ b/hw/mips/mips_fulong2e.c
@@ -231,7 +231,7 @@ static void audio_init (PCIBus *pci_bus)
 }
 
 /* Network support */
-static void network_init (void)
+static void network_init (PCIBus *pci_bus)
 {
     int i;
 
@@ -244,7 +244,7 @@ static void network_init (void)
             default_devaddr = "07";
         }
 
-        pci_nic_init_nofail(nd, "rtl8139", default_devaddr);
+        pci_nic_init_nofail(nd, pci_bus, "rtl8139", default_devaddr);
     }
 }
 
@@ -393,7 +393,7 @@ static void mips_fulong2e_init(QEMUMachineInitArgs *args)
     /* Sound card */
     audio_init(pci_bus);
     /* Network card */
-    network_init();
+    network_init(pci_bus);
 }
 
 static QEMUMachine mips_fulong2e_machine = {
diff --git a/hw/mips/mips_malta.c b/hw/mips/mips_malta.c
index 8a4459d..5843fad 100644
--- a/hw/mips/mips_malta.c
+++ b/hw/mips/mips_malta.c
@@ -468,7 +468,7 @@ static MaltaFPGAState *malta_fpga_init(MemoryRegion *address_space,
 }
 
 /* Network support */
-static void network_init(void)
+static void network_init(PCIBus *pci_bus)
 {
     int i;
 
@@ -480,7 +480,7 @@ static void network_init(void)
             /* The malta board has a PCNet card using PCI SLOT 11 */
             default_devaddr = "0b";
 
-        pci_nic_init_nofail(nd, "pcnet", default_devaddr);
+        pci_nic_init_nofail(nd, pci_bus, "pcnet", default_devaddr);
     }
 }
 
@@ -985,7 +985,7 @@ void mips_malta_init(QEMUMachineInitArgs *args)
     fdctrl_init_isa(isa_bus, fd);
 
     /* Network card */
-    network_init();
+    network_init(pci_bus);
 
     /* Optional PCI video card */
     pci_vga_init(pci_bus);
diff --git a/hw/pci/pci-hotplug-old.c b/hw/pci/pci-hotplug-old.c
index e92d646..807260c 100644
--- a/hw/pci/pci-hotplug-old.c
+++ b/hw/pci/pci-hotplug-old.c
@@ -92,7 +92,8 @@ static PCIDevice *qemu_pci_hot_add_nic(Monitor *mon,
         monitor_printf(mon, "Parameter addr not supported\n");
         return NULL;
     }
-    return pci_nic_init(&nd_table[ret], "rtl8139", devaddr);
+    return pci_nic_init(&nd_table[ret], pci_find_primary_bus(),
+                        "rtl8139", devaddr);
 }
 
 static int scsi_hot_add(Monitor *mon, DeviceState *adapter,
diff --git a/hw/pci/pci.c b/hw/pci/pci.c
index c4f63ad..2f2db0f 100644
--- a/hw/pci/pci.c
+++ b/hw/pci/pci.c
@@ -1575,7 +1575,8 @@ static const char * const pci_nic_names[] = {
 
 /* Initialize a PCI NIC.  */
 /* FIXME callers should check for failure, but don't */
-PCIDevice *pci_nic_init(NICInfo *nd, const char *default_model,
+PCIDevice *pci_nic_init(NICInfo *nd, PCIBus *rootbus,
+                        const char *default_model,
                         const char *default_devaddr)
 {
     const char *devaddr = nd->devaddr ? nd->devaddr : default_devaddr;
@@ -1589,7 +1590,7 @@ PCIDevice *pci_nic_init(NICInfo *nd, const char *default_model,
     if (i < 0)
         return NULL;
 
-    bus = pci_get_bus_devfn(&devfn, pci_find_primary_bus(), devaddr);
+    bus = pci_get_bus_devfn(&devfn, rootbus, devaddr);
     if (!bus) {
         error_report("Invalid PCI device address %s for device %s",
                      devaddr, pci_nic_names[i]);
@@ -1604,7 +1605,8 @@ PCIDevice *pci_nic_init(NICInfo *nd, const char *default_model,
     return pci_dev;
 }
 
-PCIDevice *pci_nic_init_nofail(NICInfo *nd, const char *default_model,
+PCIDevice *pci_nic_init_nofail(NICInfo *nd, PCIBus *rootbus,
+                               const char *default_model,
                                const char *default_devaddr)
 {
     PCIDevice *res;
@@ -1612,7 +1614,7 @@ PCIDevice *pci_nic_init_nofail(NICInfo *nd, const char *default_model,
     if (qemu_show_nic_models(nd->model, pci_nic_models))
         exit(0);
 
-    res = pci_nic_init(nd, default_model, default_devaddr);
+    res = pci_nic_init(nd, rootbus, default_model, default_devaddr);
     if (!res)
         exit(1);
     return res;
diff --git a/hw/ppc/e500.c b/hw/ppc/e500.c
index 38f7990..75b05a2 100644
--- a/hw/ppc/e500.c
+++ b/hw/ppc/e500.c
@@ -707,7 +707,7 @@ void ppce500_init(PPCE500Params *params)
     if (pci_bus) {
         /* Register network interfaces. */
         for (i = 0; i < nb_nics; i++) {
-            pci_nic_init_nofail(&nd_table[i], "virtio", NULL);
+            pci_nic_init_nofail(&nd_table[i], pci_bus, "virtio", NULL);
         }
     }
 
diff --git a/hw/ppc/mac_newworld.c b/hw/ppc/mac_newworld.c
index 3badfa3..98b902e 100644
--- a/hw/ppc/mac_newworld.c
+++ b/hw/ppc/mac_newworld.c
@@ -375,7 +375,7 @@ static void ppc_core99_init(QEMUMachineInitArgs *args)
                              escc_mem, 0, memory_region_size(escc_mem));
 
     for(i = 0; i < nb_nics; i++)
-        pci_nic_init_nofail(&nd_table[i], "ne2k_pci", NULL);
+        pci_nic_init_nofail(&nd_table[i], pci_bus, "ne2k_pci", NULL);
 
     ide_drive_get(hd, MAX_IDE_BUS);
 
diff --git a/hw/ppc/mac_oldworld.c b/hw/ppc/mac_oldworld.c
index 8faff30..1d73a73 100644
--- a/hw/ppc/mac_oldworld.c
+++ b/hw/ppc/mac_oldworld.c
@@ -259,7 +259,7 @@ static void ppc_heathrow_init(QEMUMachineInitArgs *args)
                              escc_mem, 0, memory_region_size(escc_mem));
 
     for(i = 0; i < nb_nics; i++)
-        pci_nic_init_nofail(&nd_table[i], "ne2k_pci", NULL);
+        pci_nic_init_nofail(&nd_table[i], pci_bus, "ne2k_pci", NULL);
 
 
     ide_drive_get(hd, MAX_IDE_BUS);
diff --git a/hw/ppc/ppc440_bamboo.c b/hw/ppc/ppc440_bamboo.c
index b0c1c02..5b039ab 100644
--- a/hw/ppc/ppc440_bamboo.c
+++ b/hw/ppc/ppc440_bamboo.c
@@ -243,7 +243,7 @@ static void bamboo_init(QEMUMachineInitArgs *args)
         for (i = 0; i < nb_nics; i++) {
             /* There are no PCI NICs on the Bamboo board, but there are
              * PCI slots, so we can pick whatever default model we want. */
-            pci_nic_init_nofail(&nd_table[i], "e1000", NULL);
+            pci_nic_init_nofail(&nd_table[i], pcibus, "e1000", NULL);
         }
     }
 
diff --git a/hw/ppc/prep.c b/hw/ppc/prep.c
index 90828f2..f674ab7 100644
--- a/hw/ppc/prep.c
+++ b/hw/ppc/prep.c
@@ -628,7 +628,7 @@ static void ppc_prep_init(QEMUMachineInitArgs *args)
             isa_ne2000_init(isa_bus, ne2000_io[i], ne2000_irq[i],
                             &nd_table[i]);
         } else {
-            pci_nic_init_nofail(&nd_table[i], "ne2k_pci", NULL);
+            pci_nic_init_nofail(&nd_table[i], pci_bus, "ne2k_pci", NULL);
         }
     }
 
diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index fe34291..e2183d3 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -887,7 +887,7 @@ static void ppc_spapr_init(QEMUMachineInitArgs *args)
         if (strcmp(nd->model, "ibmveth") == 0) {
             spapr_vlan_create(spapr->vio_bus, nd);
         } else {
-            pci_nic_init_nofail(&nd_table[i], nd->model, NULL);
+            pci_nic_init_nofail(&nd_table[i], phb->bus, nd->model, NULL);
         }
     }
 
diff --git a/hw/sh4/r2d.c b/hw/sh4/r2d.c
index 3e4818e..dd81d75 100644
--- a/hw/sh4/r2d.c
+++ b/hw/sh4/r2d.c
@@ -236,6 +236,7 @@ static void r2d_init(QEMUMachineInitArgs *args)
     DeviceState *dev;
     SysBusDevice *busdev;
     MemoryRegion *address_space_mem = get_system_memory();
+    PCIBus *pci_bus;
 
     if (cpu_model == NULL) {
         cpu_model = "SH7751R";
@@ -264,6 +265,7 @@ static void r2d_init(QEMUMachineInitArgs *args)
     dev = qdev_create(NULL, "sh_pci");
     busdev = SYS_BUS_DEVICE(dev);
     qdev_init_nofail(dev);
+    pci_bus = PCI_BUS(qdev_get_child_bus(dev, "pci"));
     sysbus_mmio_map(busdev, 0, P4ADDR(0x1e200000));
     sysbus_mmio_map(busdev, 1, A7ADDR(0x1e200000));
     sysbus_connect_irq(busdev, 0, irq[PCI_INTA]);
@@ -295,7 +297,8 @@ static void r2d_init(QEMUMachineInitArgs *args)
 
     /* NIC: rtl8139 on-board, and 2 slots. */
     for (i = 0; i < nb_nics; i++)
-        pci_nic_init_nofail(&nd_table[i], "rtl8139", i==0 ? "2" : NULL);
+        pci_nic_init_nofail(&nd_table[i], pci_bus,
+                            "rtl8139", i==0 ? "2" : NULL);
 
     /* USB keyboard */
     usbdevice_create("keyboard");
diff --git a/hw/sparc64/sun4u.c b/hw/sparc64/sun4u.c
index a6a3b76..19dd954 100644
--- a/hw/sparc64/sun4u.c
+++ b/hw/sparc64/sun4u.c
@@ -854,7 +854,7 @@ static void sun4uv_init(MemoryRegion *address_space_mem,
     }
 
     for(i = 0; i < nb_nics; i++)
-        pci_nic_init_nofail(&nd_table[i], "ne2k_pci", NULL);
+        pci_nic_init_nofail(&nd_table[i], pci_bus, "ne2k_pci", NULL);
 
     ide_drive_get(hd, MAX_IDE_BUS);
 
diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h
index 3a43fba..209dda4 100644
--- a/include/hw/pci/pci.h
+++ b/include/hw/pci/pci.h
@@ -378,9 +378,11 @@ void pci_device_set_intx_routing_notifier(PCIDevice *dev,
 void pci_device_reset(PCIDevice *dev);
 void pci_bus_reset(PCIBus *bus);
 
-PCIDevice *pci_nic_init(NICInfo *nd, const char *default_model,
+PCIDevice *pci_nic_init(NICInfo *nd, PCIBus *rootbus,
+                        const char *default_model,
                         const char *default_devaddr);
-PCIDevice *pci_nic_init_nofail(NICInfo *nd, const char *default_model,
+PCIDevice *pci_nic_init_nofail(NICInfo *nd, PCIBus *rootbus,
+                               const char *default_model,
                                const char *default_devaddr);
 
 PCIDevice *pci_vga_init(PCIBus *bus);
-- 
MST

[Qemu-devel] [PULL v4 16/18] pci: Simpler implementation of primary PCI bus

[Michael S. Tsirkin]

From: David Gibson <david@gibson.dropbear.id.au>

Currently pci_find_primary_bus() searches the list of root buses for one
with domain 0.  But since host buses are always registered with domain 0,
this just amounts to finding the only PCI host bus.  The only remaining
users of pci_find_primary_bus() are in pci-hotplug-old.c, which implements
the old style pci_add/pci_del commands.

Therefore, this patch redefines pci_find_primary_bus() to find the only
PCI root bus, returning an error if there are multiple roots.  The callers
in pci-hotplug-old.c are updated correspondingly, to produce sensible
error messages.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/pci/pci-hotplug-old.c | 26 ++++++++++++++++++++------
 hw/pci/pci.c             |  9 ++++++---
 2 files changed, 26 insertions(+), 9 deletions(-)

diff --git a/hw/pci/pci-hotplug-old.c b/hw/pci/pci-hotplug-old.c
index 807260c..8077289 100644
--- a/hw/pci/pci-hotplug-old.c
+++ b/hw/pci/pci-hotplug-old.c
@@ -62,10 +62,17 @@ static PCIDevice *qemu_pci_hot_add_nic(Monitor *mon,
 {
     Error *local_err = NULL;
     QemuOpts *opts;
+    PCIBus *root = pci_find_primary_bus();
     PCIBus *bus;
     int ret, devfn;
 
-    bus = pci_get_bus_devfn(&devfn, pci_find_primary_bus(), devaddr);
+    if (!root) {
+        monitor_printf(mon, "no primary PCI bus (if there are multiple"
+                       " PCI roots, you must use device_add instead)");
+        return NULL;
+    }
+
+    bus = pci_get_bus_devfn(&devfn, root, devaddr);
     if (!bus) {
         monitor_printf(mon, "Invalid PCI device address %s\n", devaddr);
         return NULL;
@@ -92,8 +99,7 @@ static PCIDevice *qemu_pci_hot_add_nic(Monitor *mon,
         monitor_printf(mon, "Parameter addr not supported\n");
         return NULL;
     }
-    return pci_nic_init(&nd_table[ret], pci_find_primary_bus(),
-                        "rtl8139", devaddr);
+    return pci_nic_init(&nd_table[ret], root, "rtl8139", devaddr);
 }
 
 static int scsi_hot_add(Monitor *mon, DeviceState *adapter,
@@ -144,7 +150,8 @@ int pci_drive_hot_add(Monitor *mon, const QDict *qdict, DriveInfo *dinfo)
     switch (dinfo->type) {
     case IF_SCSI:
         if (!root) {
-            monitor_printf(mon, "no primary PCI bus\n");
+            monitor_printf(mon, "no primary PCI bus (if there are multiple"
+                           " PCI roots, you must use device_add instead)");
             goto err;
         }
         if (pci_read_devaddr(mon, pci_addr, &pci_bus, &slot)) {
@@ -177,6 +184,7 @@ static PCIDevice *qemu_pci_hot_add_storage(Monitor *mon,
     DriveInfo *dinfo = NULL;
     int type = -1;
     char buf[128];
+    PCIBus *root = pci_find_primary_bus();
     PCIBus *bus;
     int devfn;
 
@@ -206,7 +214,12 @@ static PCIDevice *qemu_pci_hot_add_storage(Monitor *mon,
         dinfo = NULL;
     }
 
-    bus = pci_get_bus_devfn(&devfn, pci_find_primary_bus(), devaddr);
+    if (!root) {
+        monitor_printf(mon, "no primary PCI bus (if there are multiple"
+                       " PCI roots, you must use device_add instead)");
+        return NULL;
+    }
+    bus = pci_get_bus_devfn(&devfn, root, devaddr);
     if (!bus) {
         monitor_printf(mon, "Invalid PCI device address %s\n", devaddr);
         return NULL;
@@ -293,7 +306,8 @@ static int pci_device_hot_remove(Monitor *mon, const char *pci_addr)
     Error *local_err = NULL;
 
     if (!root) {
-        monitor_printf(mon, "no primary PCI bus\n");
+        monitor_printf(mon, "no primary PCI bus (if there are multiple"
+                       " PCI roots, you must use device_del instead)");
         return -1;
     }
 
diff --git a/hw/pci/pci.c b/hw/pci/pci.c
index 2f2db0f..e0995aa 100644
--- a/hw/pci/pci.c
+++ b/hw/pci/pci.c
@@ -249,15 +249,18 @@ static void pci_host_bus_register(int domain, PCIBus *bus)
 
 PCIBus *pci_find_primary_bus(void)
 {
+    PCIBus *primary_bus = NULL;
     struct PCIHostBus *host;
 
     QLIST_FOREACH(host, &host_buses, next) {
-        if (host->domain == 0) {
-            return host->bus;
+        if (primary_bus) {
+            /* We have multiple root buses, refuse to select a primary */
+            return NULL;
         }
+        primary_bus = host->bus;
     }
 
-    return NULL;
+    return primary_bus;
 }
 
 PCIBus *pci_device_root_bus(const PCIDevice *d)
-- 
MST

[Qemu-devel] [PULL v4 17/18] pci: Remove domain from PCIHostBus

[Michael S. Tsirkin]

From: David Gibson <david@gibson.dropbear.id.au>

There are now no users of the domain field of PCIHostBus, so remove it
from the structure, and as a parameter from the pci_host_bus_register()
function which sets it.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/pci/pci.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/hw/pci/pci.c b/hw/pci/pci.c
index e0995aa..d861b40 100644
--- a/hw/pci/pci.c
+++ b/hw/pci/pci.c
@@ -91,7 +91,6 @@ static uint16_t pci_default_sub_vendor_id = PCI_SUBVENDOR_ID_REDHAT_QUMRANET;
 static uint16_t pci_default_sub_device_id = PCI_SUBDEVICE_ID_QEMU;
 
 struct PCIHostBus {
-    int domain;
     struct PCIBus *bus;
     QLIST_ENTRY(PCIHostBus) next;
 };
@@ -238,11 +237,10 @@ static int pcibus_reset(BusState *qbus)
     return 1;
 }
 
-static void pci_host_bus_register(int domain, PCIBus *bus)
+static void pci_host_bus_register(PCIBus *bus)
 {
     struct PCIHostBus *host;
     host = g_malloc0(sizeof(*host));
-    host->domain = domain;
     host->bus = bus;
     QLIST_INSERT_HEAD(&host_buses, host, next);
 }
@@ -303,7 +301,8 @@ static void pci_bus_init(PCIBus *bus, DeviceState *parent,
 
     /* host bridge */
     QLIST_INIT(&bus->child);
-    pci_host_bus_register(0, bus); /* for now only pci domain 0 is supported */
+
+    pci_host_bus_register(bus);
 
     vmstate_register(NULL, -1, &vmstate_pcibus, bus);
 }
-- 
MST

[Qemu-devel] [PULL v4 18/18] pci: Fold host_buses list into PCIHostState functionality

[Michael S. Tsirkin]

From: David Gibson <david@gibson.dropbear.id.au>

The host_buses list is an odd structure - a list of pointers to PCI root
buses existing in parallel to the normal qdev tree structure.  This patch
removes it, instead putting the link pointers into the PCIHostState
structure, which have a 1:1 relationship to PCIHostBus structures anyway.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/pci/pci.c              | 33 ++++++++++++++-------------------
 include/hw/pci/pci_host.h |  2 ++
 2 files changed, 16 insertions(+), 19 deletions(-)

diff --git a/hw/pci/pci.c b/hw/pci/pci.c
index d861b40..8680063 100644
--- a/hw/pci/pci.c
+++ b/hw/pci/pci.c
@@ -90,11 +90,7 @@ static void pci_del_option_rom(PCIDevice *pdev);
 static uint16_t pci_default_sub_vendor_id = PCI_SUBVENDOR_ID_REDHAT_QUMRANET;
 static uint16_t pci_default_sub_device_id = PCI_SUBDEVICE_ID_QEMU;
 
-struct PCIHostBus {
-    struct PCIBus *bus;
-    QLIST_ENTRY(PCIHostBus) next;
-};
-static QLIST_HEAD(, PCIHostBus) host_buses;
+static QLIST_HEAD(, PCIHostState) pci_host_bridges;
 
 static const VMStateDescription vmstate_pcibus = {
     .name = "PCIBUS",
@@ -237,20 +233,19 @@ static int pcibus_reset(BusState *qbus)
     return 1;
 }
 
-static void pci_host_bus_register(PCIBus *bus)
+static void pci_host_bus_register(PCIBus *bus, DeviceState *parent)
 {
-    struct PCIHostBus *host;
-    host = g_malloc0(sizeof(*host));
-    host->bus = bus;
-    QLIST_INSERT_HEAD(&host_buses, host, next);
+    PCIHostState *host_bridge = PCI_HOST_BRIDGE(parent);
+
+    QLIST_INSERT_HEAD(&pci_host_bridges, host_bridge, next);
 }
 
 PCIBus *pci_find_primary_bus(void)
 {
     PCIBus *primary_bus = NULL;
-    struct PCIHostBus *host;
+    PCIHostState *host;
 
-    QLIST_FOREACH(host, &host_buses, next) {
+    QLIST_FOREACH(host, &pci_host_bridges, next) {
         if (primary_bus) {
             /* We have multiple root buses, refuse to select a primary */
             return NULL;
@@ -302,7 +297,7 @@ static void pci_bus_init(PCIBus *bus, DeviceState *parent,
     /* host bridge */
     QLIST_INIT(&bus->child);
 
-    pci_host_bus_register(bus);
+    pci_host_bus_register(bus, parent);
 
     vmstate_register(NULL, -1, &vmstate_pcibus, bus);
 }
@@ -1533,11 +1528,11 @@ static PciInfo *qmp_query_pci_bus(PCIBus *bus, int bus_num)
 PciInfoList *qmp_query_pci(Error **errp)
 {
     PciInfoList *info, *head = NULL, *cur_item = NULL;
-    struct PCIHostBus *host;
+    PCIHostState *host_bridge;
 
-    QLIST_FOREACH(host, &host_buses, next) {
+    QLIST_FOREACH(host_bridge, &pci_host_bridges, next) {
         info = g_malloc0(sizeof(*info));
-        info->value = qmp_query_pci_bus(host->bus, 0);
+        info->value = qmp_query_pci_bus(host_bridge->bus, 0);
 
         /* XXX: waiting for the qapi to support GSList */
         if (!cur_item) {
@@ -2201,11 +2196,11 @@ static int pci_qdev_find_recursive(PCIBus *bus,
 
 int pci_qdev_find_device(const char *id, PCIDevice **pdev)
 {
-    struct PCIHostBus *host;
+    PCIHostState *host_bridge;
     int rc = -ENODEV;
 
-    QLIST_FOREACH(host, &host_buses, next) {
-        int tmp = pci_qdev_find_recursive(host->bus, id, pdev);
+    QLIST_FOREACH(host_bridge, &pci_host_bridges, next) {
+        int tmp = pci_qdev_find_recursive(host_bridge->bus, id, pdev);
         if (!tmp) {
             rc = 0;
             break;
diff --git a/include/hw/pci/pci_host.h b/include/hw/pci/pci_host.h
index 44052f2..ba31595 100644
--- a/include/hw/pci/pci_host.h
+++ b/include/hw/pci/pci_host.h
@@ -46,6 +46,8 @@ struct PCIHostState {
     MemoryRegion mmcfg;
     uint32_t config_reg;
     PCIBus *bus;
+
+    QLIST_ENTRY(PCIHostState) next;
 };
 
 typedef struct PCIHostBridgeClass {
-- 
MST

[Qemu-devel] [PULL v4 02/18] pci: store PCI hole ranges in guestinfo structure

[Michael S. Tsirkin]

Will be used to pass hole ranges to guests.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/i386/pc.c              | 46 +++++++++++++++++++++++++++++++++++++++++++++-
 hw/i386/pc_piix.c         | 14 +++++++++++++-
 hw/i386/pc_q35.c          |  6 +++++-
 hw/pci-host/q35.c         |  8 ++++++++
 include/hw/i386/pc.h      | 19 ++++++++++++++++++-
 include/hw/pci-host/q35.h |  2 ++
 include/qemu/typedefs.h   |  1 +
 7 files changed, 92 insertions(+), 4 deletions(-)

diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 78f92e2..8af1e4e 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -989,6 +989,48 @@ void pc_cpus_init(const char *cpu_model, DeviceState *icc_bridge)
     }
 }
 
+typedef struct PcGuestInfoState {
+    PcGuestInfo info;
+    Notifier machine_done;
+} PcGuestInfoState;
+
+static
+void pc_guest_info_machine_done(Notifier *notifier, void *data)
+{
+    PcGuestInfoState *guest_info_state = container_of(notifier,
+                                                      PcGuestInfoState,
+                                                      machine_done);
+}
+
+PcGuestInfo *pc_guest_info_init(ram_addr_t below_4g_mem_size,
+                                ram_addr_t above_4g_mem_size)
+{
+    PcGuestInfoState *guest_info_state = g_malloc0(sizeof *guest_info_state);
+    PcGuestInfo *guest_info = &guest_info_state->info;
+
+    guest_info->pci_info.w32.end = IO_APIC_DEFAULT_ADDRESS;
+    if (sizeof(hwaddr) == 4) {
+        guest_info->pci_info.w64.begin = 0;
+        guest_info->pci_info.w64.end = 0;
+    } else {
+        /*
+         * BIOS does not set MTRR entries for the 64 bit window, so no need to
+         * align address to power of two.  Align address at 1G, this makes sure
+         * it can be exactly covered with a PAT entry even when using huge
+         * pages.
+         */
+        guest_info->pci_info.w64.begin =
+            ROUND_UP((0x1ULL << 32) + above_4g_mem_size, 0x1ULL << 30);
+        guest_info->pci_info.w64.end = guest_info->pci_info.w64.begin +
+            (0x1ULL << 62);
+        assert(guest_info->pci_info.w64.begin <= guest_info->pci_info.w64.end);
+    }
+
+    guest_info_state->machine_done.notify = pc_guest_info_machine_done;
+    qemu_add_machine_init_done_notifier(&guest_info_state->machine_done);
+    return guest_info;
+}
+
 void pc_acpi_init(const char *default_dsdt)
 {
     char *filename;
@@ -1030,7 +1072,8 @@ FWCfgState *pc_memory_init(MemoryRegion *system_memory,
                            ram_addr_t below_4g_mem_size,
                            ram_addr_t above_4g_mem_size,
                            MemoryRegion *rom_memory,
-                           MemoryRegion **ram_memory)
+                           MemoryRegion **ram_memory,
+                           PcGuestInfo *guest_info)
 {
     int linux_boot, i;
     MemoryRegion *ram, *option_rom_mr;
@@ -1082,6 +1125,7 @@ FWCfgState *pc_memory_init(MemoryRegion *system_memory,
     for (i = 0; i < nb_option_roms; i++) {
         rom_add_option(option_rom[i].name, option_rom[i].bootindex);
     }
+    guest_info->fw_cfg = fw_cfg;
     return fw_cfg;
 }
 
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index fa59a0c..4637bde 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -90,6 +90,7 @@ static void pc_init1(MemoryRegion *system_memory,
     MemoryRegion *rom_memory;
     DeviceState *icc_bridge;
     FWCfgState *fw_cfg = NULL;
+    PcGuestInfo *guest_info;
 
     if (xen_enabled() && xen_hvm_init() != 0) {
         fprintf(stderr, "xen hardware virtual machine initialisation failed\n");
@@ -124,12 +125,23 @@ static void pc_init1(MemoryRegion *system_memory,
         rom_memory = system_memory;
     }
 
+    guest_info = pc_guest_info_init(below_4g_mem_size, above_4g_mem_size);
+
+    /* Set PCI window size the way seabios has always done it. */
+    /* Power of 2 so bios can cover it with a single MTRR */
+    if (ram_size <= 0x80000000)
+        guest_info->pci_info.w32.begin = 0x80000000;
+    else if (ram_size <= 0xc0000000)
+        guest_info->pci_info.w32.begin = 0xc0000000;
+    else
+        guest_info->pci_info.w32.begin = 0xe0000000;
+
     /* allocate ram and load rom/bios */
     if (!xen_enabled()) {
         fw_cfg = pc_memory_init(system_memory,
                        kernel_filename, kernel_cmdline, initrd_filename,
                        below_4g_mem_size, above_4g_mem_size,
-                       rom_memory, &ram_memory);
+                       rom_memory, &ram_memory, guest_info);
     }
 
     gsi_state = g_malloc0(sizeof(*gsi_state));
diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
index bb0ce6a..a13acf2 100644
--- a/hw/i386/pc_q35.c
+++ b/hw/i386/pc_q35.c
@@ -77,6 +77,7 @@ static void pc_q35_init(QEMUMachineInitArgs *args)
     ICH9LPCState *ich9_lpc;
     PCIDevice *ahci;
     DeviceState *icc_bridge;
+    PcGuestInfo *guest_info;
 
     icc_bridge = qdev_create(NULL, TYPE_ICC_BRIDGE);
     object_property_add_child(qdev_get_machine(), "icc-bridge",
@@ -105,11 +106,13 @@ static void pc_q35_init(QEMUMachineInitArgs *args)
         rom_memory = get_system_memory();
     }
 
+    guest_info = pc_guest_info_init(below_4g_mem_size, above_4g_mem_size);
+
     /* allocate ram and load rom/bios */
     if (!xen_enabled()) {
         pc_memory_init(get_system_memory(), kernel_filename, kernel_cmdline,
                        initrd_filename, below_4g_mem_size, above_4g_mem_size,
-                       rom_memory, &ram_memory);
+                       rom_memory, &ram_memory, guest_info);
     }
 
     /* irq lines */
@@ -131,6 +134,7 @@ static void pc_q35_init(QEMUMachineInitArgs *args)
     q35_host->mch.address_space_io = get_system_io();
     q35_host->mch.below_4g_mem_size = below_4g_mem_size;
     q35_host->mch.above_4g_mem_size = above_4g_mem_size;
+    q35_host->mch.guest_info = guest_info;
     /* pci */
     qdev_init_nofail(DEVICE(q35_host));
     host_bus = q35_host->host.pci.bus;
diff --git a/hw/pci-host/q35.c b/hw/pci-host/q35.c
index 24df6b5..3a5cff9 100644
--- a/hw/pci-host/q35.c
+++ b/hw/pci-host/q35.c
@@ -244,6 +244,14 @@ static int mch_init(PCIDevice *d)
     hwaddr pci_hole64_size;
     MCHPCIState *mch = MCH_PCI_DEVICE(d);
 
+    /* Leave enough space for the biggest MCFG BAR */
+    /* TODO: this matches current bios behaviour, but
+     * it's not a power of two, which means an MTRR
+     * can't cover it exactly.
+     */
+    mch->guest_info->pci_info.w32.begin = MCH_HOST_BRIDGE_PCIEXBAR_DEFAULT +
+        MCH_HOST_BRIDGE_PCIEXBAR_MAX;
+
     /* setup pci memory regions */
     memory_region_init_alias(&mch->pci_hole, "pci-hole",
                              mch->pci_address_space,
diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index a417402..eaf6a5d 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -9,8 +9,20 @@
 #include "net/net.h"
 #include "hw/i386/ioapic.h"
 
+#include "qemu/range.h"
+
 /* PC-style peripherals (also used by other machines).  */
 
+typedef struct PcPciInfo {
+    Range w32;
+    Range w64;
+} PcPciInfo;
+
+struct PcGuestInfo {
+    PcPciInfo pci_info;
+    FWCfgState *fw_cfg;
+};
+
 /* parallel.c */
 static inline bool parallel_init(ISABus *bus, int index, CharDriverState *chr)
 {
@@ -82,6 +94,10 @@ void pc_acpi_smi_interrupt(void *opaque, int irq, int level);
 void pc_cpus_init(const char *cpu_model, DeviceState *icc_bridge);
 void pc_hot_add_cpu(const int64_t id, Error **errp);
 void pc_acpi_init(const char *default_dsdt);
+
+PcGuestInfo *pc_guest_info_init(ram_addr_t below_4g_mem_size,
+                                ram_addr_t above_4g_mem_size);
+
 FWCfgState *pc_memory_init(MemoryRegion *system_memory,
                            const char *kernel_filename,
                            const char *kernel_cmdline,
@@ -89,7 +105,8 @@ FWCfgState *pc_memory_init(MemoryRegion *system_memory,
                            ram_addr_t below_4g_mem_size,
                            ram_addr_t above_4g_mem_size,
                            MemoryRegion *rom_memory,
-                           MemoryRegion **ram_memory);
+                           MemoryRegion **ram_memory,
+                           PcGuestInfo *guest_info);
 qemu_irq *pc_allocate_cpu_irq(void);
 DeviceState *pc_vga_init(ISABus *isa_bus, PCIBus *pci_bus);
 void pc_basic_device_init(ISABus *isa_bus, qemu_irq *gsi,
diff --git a/include/hw/pci-host/q35.h b/include/hw/pci-host/q35.h
index e182c82..b083831 100644
--- a/include/hw/pci-host/q35.h
+++ b/include/hw/pci-host/q35.h
@@ -55,6 +55,7 @@ typedef struct MCHPCIState {
     uint8_t smm_enabled;
     ram_addr_t below_4g_mem_size;
     ram_addr_t above_4g_mem_size;
+    PcGuestInfo *guest_info;
 } MCHPCIState;
 
 typedef struct Q35PCIHost {
@@ -81,6 +82,7 @@ typedef struct Q35PCIHost {
 #define MCH_HOST_BRIDGE_PCIEXBAR               0x60    /* 64bit register */
 #define MCH_HOST_BRIDGE_PCIEXBAR_SIZE          8       /* 64bit register */
 #define MCH_HOST_BRIDGE_PCIEXBAR_DEFAULT       0xb0000000
+#define MCH_HOST_BRIDGE_PCIEXBAR_MAX           (0x10000000) /* 256M */
 #define MCH_HOST_BRIDGE_PCIEXBAR_ADMSK         Q35_MASK(64, 35, 28)
 #define MCH_HOST_BRIDGE_PCIEXBAR_128ADMSK      ((uint64_t)(1 << 26))
 #define MCH_HOST_BRIDGE_PCIEXBAR_64ADMSK       ((uint64_t)(1 << 25))
diff --git a/include/qemu/typedefs.h b/include/qemu/typedefs.h
index 698fc03..ac9f8d4 100644
--- a/include/qemu/typedefs.h
+++ b/include/qemu/typedefs.h
@@ -64,5 +64,6 @@ typedef struct VirtIODevice VirtIODevice;
 typedef struct QEMUSGList QEMUSGList;
 typedef struct SHPCDevice SHPCDevice;
 typedef struct FWCfgState FWCfgState;
+typedef struct PcGuestInfo PcGuestInfo;
 
 #endif /* QEMU_TYPEDEFS_H */
-- 
MST

Re: [Qemu-devel] [PULL v4 00/18] pci,misc enhancements

[Stefano Stabellini]

On Sun, 7 Jul 2013, Michael S. Tsirkin wrote:
> From: Michael S. Tsirkin <mst@redhat.com>
> 
> Changes from v3:
>     - fix up xen build
> 
> Changes from v2:
>     - rebased to origin/master
>     - fixed up botched posting
> 
> The following changes since commit ab8bf29078e0ab8347e2ff8b4e5542f7a0c751cf:
> 
>   Merge remote-tracking branch 'qemu-kvm/uq/master' into staging (2013-07-03 08:37:00 -0500)
> 
> are available in the git repository at:
> 
> 
>   git://git.kernel.org/pub/scm/virt/kvm/mst/qemu.git tags/for_anthony
> 
> for you to fetch changes up to 7588e2b0559ae72d3c2952c7807fc05c03099970:
> 
>   pci: Fold host_buses list into PCIHostState functionality (2013-07-07 23:10:57 +0300)

This patch series breaks Xen support in QEMU.
Unfortunately QEMU exits at boot time with no output, I'll try to get
back to you with more info.

Re: [Qemu-devel] [PULL v4 00/18] pci,misc enhancements

[Michael S. Tsirkin]

On Wed, Jul 10, 2013 at 03:11:27PM +0100, Stefano Stabellini wrote:
> On Sun, 7 Jul 2013, Michael S. Tsirkin wrote:
> > From: Michael S. Tsirkin <mst@redhat.com>
> > 
> > Changes from v3:
> >     - fix up xen build
> > 
> > Changes from v2:
> >     - rebased to origin/master
> >     - fixed up botched posting
> > 
> > The following changes since commit ab8bf29078e0ab8347e2ff8b4e5542f7a0c751cf:
> > 
> >   Merge remote-tracking branch 'qemu-kvm/uq/master' into staging (2013-07-03 08:37:00 -0500)
> > 
> > are available in the git repository at:
> > 
> > 
> >   git://git.kernel.org/pub/scm/virt/kvm/mst/qemu.git tags/for_anthony
> > 
> > for you to fetch changes up to 7588e2b0559ae72d3c2952c7807fc05c03099970:
> > 
> >   pci: Fold host_buses list into PCIHostState functionality (2013-07-07 23:10:57 +0300)
> 
> This patch series breaks Xen support in QEMU.
> Unfortunately QEMU exits at boot time with no output, I'll try to get
> back to you with more info.

This is the main change for Xen:

-    bus = pci_find_root_bus(0);
+    bus = pci_find_primary_bus();

Could you please try 1ef7a2a2afedbba47e06af5081a8b4bf6dc1cf71
that made this change, and 1ef7a2a2afedbba47e06af5081a8b4bf6dc1cf71~1 
before it?

Re: [Qemu-devel] [PULL v4 00/18] pci,misc enhancements

[Stefano Stabellini]

On Wed, 10 Jul 2013, Michael S. Tsirkin wrote:
> On Wed, Jul 10, 2013 at 03:11:27PM +0100, Stefano Stabellini wrote:
> > On Sun, 7 Jul 2013, Michael S. Tsirkin wrote:
> > > From: Michael S. Tsirkin <mst@redhat.com>
> > > 
> > > Changes from v3:
> > >     - fix up xen build
> > > 
> > > Changes from v2:
> > >     - rebased to origin/master
> > >     - fixed up botched posting
> > > 
> > > The following changes since commit ab8bf29078e0ab8347e2ff8b4e5542f7a0c751cf:
> > > 
> > >   Merge remote-tracking branch 'qemu-kvm/uq/master' into staging (2013-07-03 08:37:00 -0500)
> > > 
> > > are available in the git repository at:
> > > 
> > > 
> > >   git://git.kernel.org/pub/scm/virt/kvm/mst/qemu.git tags/for_anthony
> > > 
> > > for you to fetch changes up to 7588e2b0559ae72d3c2952c7807fc05c03099970:
> > > 
> > >   pci: Fold host_buses list into PCIHostState functionality (2013-07-07 23:10:57 +0300)
> > 
> > This patch series breaks Xen support in QEMU.
> > Unfortunately QEMU exits at boot time with no output, I'll try to get
> > back to you with more info.
> 
> This is the main change for Xen:
> 
> -    bus = pci_find_root_bus(0);
> +    bus = pci_find_primary_bus();
> 
> Could you please try 1ef7a2a2afedbba47e06af5081a8b4bf6dc1cf71
> that made this change, and 1ef7a2a2afedbba47e06af5081a8b4bf6dc1cf71~1 
> before it?
> 

git bisect tells me that the problem is caused by:

commit f8c457b88d72a48989f190bc3d7b79f4f3b7d11c
Author: Michael S. Tsirkin <mst@redhat.com>
Date:   Mon May 13 20:00:23 2013 +0300

    pc: pass PCI hole ranges to Guests
        

Re: [Qemu-devel] [PULL v4 00/18] pci,misc enhancements

[Michael S. Tsirkin]

On Wed, Jul 10, 2013 at 03:30:01PM +0100, Stefano Stabellini wrote:
> On Wed, 10 Jul 2013, Michael S. Tsirkin wrote:
> > On Wed, Jul 10, 2013 at 03:11:27PM +0100, Stefano Stabellini wrote:
> > > On Sun, 7 Jul 2013, Michael S. Tsirkin wrote:
> > > > From: Michael S. Tsirkin <mst@redhat.com>
> > > > 
> > > > Changes from v3:
> > > >     - fix up xen build
> > > > 
> > > > Changes from v2:
> > > >     - rebased to origin/master
> > > >     - fixed up botched posting
> > > > 
> > > > The following changes since commit ab8bf29078e0ab8347e2ff8b4e5542f7a0c751cf:
> > > > 
> > > >   Merge remote-tracking branch 'qemu-kvm/uq/master' into staging (2013-07-03 08:37:00 -0500)
> > > > 
> > > > are available in the git repository at:
> > > > 
> > > > 
> > > >   git://git.kernel.org/pub/scm/virt/kvm/mst/qemu.git tags/for_anthony
> > > > 
> > > > for you to fetch changes up to 7588e2b0559ae72d3c2952c7807fc05c03099970:
> > > > 
> > > >   pci: Fold host_buses list into PCIHostState functionality (2013-07-07 23:10:57 +0300)
> > > 
> > > This patch series breaks Xen support in QEMU.
> > > Unfortunately QEMU exits at boot time with no output, I'll try to get
> > > back to you with more info.
> > 
> > This is the main change for Xen:
> > 
> > -    bus = pci_find_root_bus(0);
> > +    bus = pci_find_primary_bus();
> > 
> > Could you please try 1ef7a2a2afedbba47e06af5081a8b4bf6dc1cf71
> > that made this change, and 1ef7a2a2afedbba47e06af5081a8b4bf6dc1cf71~1 
> > before it?
> > 
> 
> git bisect tells me that the problem is caused by:
> 
> commit f8c457b88d72a48989f190bc3d7b79f4f3b7d11c
> Author: Michael S. Tsirkin <mst@redhat.com>
> Date:   Mon May 13 20:00:23 2013 +0300
> 
>     pc: pass PCI hole ranges to Guests
>         


Does this help?


diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 9f9207d..c7fc475 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -999,7 +999,7 @@ typedef struct PcRomPciInfo {
 static void pc_fw_cfg_guest_info(PcGuestInfo *guest_info)
 {
     PcRomPciInfo *info;
-    if (!guest_info->has_pci_info) {
+    if (!guest_info->has_pci_info || !guest_info->fw_cfg) {
         return;
     }
 

Re: [Qemu-devel] [PULL v4 00/18] pci,misc enhancements

[Stefano Stabellini]

On Wed, 10 Jul 2013, Michael S. Tsirkin wrote:
> On Wed, Jul 10, 2013 at 03:30:01PM +0100, Stefano Stabellini wrote:
> > On Wed, 10 Jul 2013, Michael S. Tsirkin wrote:
> > > On Wed, Jul 10, 2013 at 03:11:27PM +0100, Stefano Stabellini wrote:
> > > > On Sun, 7 Jul 2013, Michael S. Tsirkin wrote:
> > > > > From: Michael S. Tsirkin <mst@redhat.com>
> > > > > 
> > > > > Changes from v3:
> > > > >     - fix up xen build
> > > > > 
> > > > > Changes from v2:
> > > > >     - rebased to origin/master
> > > > >     - fixed up botched posting
> > > > > 
> > > > > The following changes since commit ab8bf29078e0ab8347e2ff8b4e5542f7a0c751cf:
> > > > > 
> > > > >   Merge remote-tracking branch 'qemu-kvm/uq/master' into staging (2013-07-03 08:37:00 -0500)
> > > > > 
> > > > > are available in the git repository at:
> > > > > 
> > > > > 
> > > > >   git://git.kernel.org/pub/scm/virt/kvm/mst/qemu.git tags/for_anthony
> > > > > 
> > > > > for you to fetch changes up to 7588e2b0559ae72d3c2952c7807fc05c03099970:
> > > > > 
> > > > >   pci: Fold host_buses list into PCIHostState functionality (2013-07-07 23:10:57 +0300)
> > > > 
> > > > This patch series breaks Xen support in QEMU.
> > > > Unfortunately QEMU exits at boot time with no output, I'll try to get
> > > > back to you with more info.
> > > 
> > > This is the main change for Xen:
> > > 
> > > -    bus = pci_find_root_bus(0);
> > > +    bus = pci_find_primary_bus();
> > > 
> > > Could you please try 1ef7a2a2afedbba47e06af5081a8b4bf6dc1cf71
> > > that made this change, and 1ef7a2a2afedbba47e06af5081a8b4bf6dc1cf71~1 
> > > before it?
> > > 
> > 
> > git bisect tells me that the problem is caused by:
> > 
> > commit f8c457b88d72a48989f190bc3d7b79f4f3b7d11c
> > Author: Michael S. Tsirkin <mst@redhat.com>
> > Date:   Mon May 13 20:00:23 2013 +0300
> > 
> >     pc: pass PCI hole ranges to Guests
> >         
> 
> 
> Does this help?
> 
> 
> diff --git a/hw/i386/pc.c b/hw/i386/pc.c
> index 9f9207d..c7fc475 100644
> --- a/hw/i386/pc.c
> +++ b/hw/i386/pc.c
> @@ -999,7 +999,7 @@ typedef struct PcRomPciInfo {
>  static void pc_fw_cfg_guest_info(PcGuestInfo *guest_info)
>  {
>      PcRomPciInfo *info;
> -    if (!guest_info->has_pci_info) {
> +    if (!guest_info->has_pci_info || !guest_info->fw_cfg) {
>          return;
>      }
>  

Yes, it does.
Can we introduce a couple of macros to test for fw_cfg availability?
Maybe they would help avoiding these issues in the future.

Re: [Qemu-devel] [PULL v4 00/18] pci,misc enhancements

[Michael S. Tsirkin]

On Wed, Jul 10, 2013 at 04:34:30PM +0100, Stefano Stabellini wrote:
> On Wed, 10 Jul 2013, Michael S. Tsirkin wrote:
> > On Wed, Jul 10, 2013 at 03:30:01PM +0100, Stefano Stabellini wrote:
> > > On Wed, 10 Jul 2013, Michael S. Tsirkin wrote:
> > > > On Wed, Jul 10, 2013 at 03:11:27PM +0100, Stefano Stabellini wrote:
> > > > > On Sun, 7 Jul 2013, Michael S. Tsirkin wrote:
> > > > > > From: Michael S. Tsirkin <mst@redhat.com>
> > > > > > 
> > > > > > Changes from v3:
> > > > > >     - fix up xen build
> > > > > > 
> > > > > > Changes from v2:
> > > > > >     - rebased to origin/master
> > > > > >     - fixed up botched posting
> > > > > > 
> > > > > > The following changes since commit ab8bf29078e0ab8347e2ff8b4e5542f7a0c751cf:
> > > > > > 
> > > > > >   Merge remote-tracking branch 'qemu-kvm/uq/master' into staging (2013-07-03 08:37:00 -0500)
> > > > > > 
> > > > > > are available in the git repository at:
> > > > > > 
> > > > > > 
> > > > > >   git://git.kernel.org/pub/scm/virt/kvm/mst/qemu.git tags/for_anthony
> > > > > > 
> > > > > > for you to fetch changes up to 7588e2b0559ae72d3c2952c7807fc05c03099970:
> > > > > > 
> > > > > >   pci: Fold host_buses list into PCIHostState functionality (2013-07-07 23:10:57 +0300)
> > > > > 
> > > > > This patch series breaks Xen support in QEMU.
> > > > > Unfortunately QEMU exits at boot time with no output, I'll try to get
> > > > > back to you with more info.
> > > > 
> > > > This is the main change for Xen:
> > > > 
> > > > -    bus = pci_find_root_bus(0);
> > > > +    bus = pci_find_primary_bus();
> > > > 
> > > > Could you please try 1ef7a2a2afedbba47e06af5081a8b4bf6dc1cf71
> > > > that made this change, and 1ef7a2a2afedbba47e06af5081a8b4bf6dc1cf71~1 
> > > > before it?
> > > > 
> > > 
> > > git bisect tells me that the problem is caused by:
> > > 
> > > commit f8c457b88d72a48989f190bc3d7b79f4f3b7d11c
> > > Author: Michael S. Tsirkin <mst@redhat.com>
> > > Date:   Mon May 13 20:00:23 2013 +0300
> > > 
> > >     pc: pass PCI hole ranges to Guests
> > >         
> > 
> > 
> > Does this help?
> > 
> > 
> > diff --git a/hw/i386/pc.c b/hw/i386/pc.c
> > index 9f9207d..c7fc475 100644
> > --- a/hw/i386/pc.c
> > +++ b/hw/i386/pc.c
> > @@ -999,7 +999,7 @@ typedef struct PcRomPciInfo {
> >  static void pc_fw_cfg_guest_info(PcGuestInfo *guest_info)
> >  {
> >      PcRomPciInfo *info;
> > -    if (!guest_info->has_pci_info) {
> > +    if (!guest_info->has_pci_info || !guest_info->fw_cfg) {
> >          return;
> >      }
> >  
> 
> Yes, it does.
> Can we introduce a couple of macros to test for fw_cfg availability?
> Maybe they would help avoiding these issues in the future.

Needs some thought, but let's fix this quickly so master isn't broken for
people.