[Qemu-devel] [PATCH] pc: Get rid of pci-info leftovers

[Markus Armbruster]

pc_fw_cfg_guest_info() never does anything, because has_pci_info is
always false.

Introduced in commit f8c457b "pc: pass PCI hole ranges to Guests",
disabled in commit 9604f70 "pc: disable pci-info for 1.6", and hasn't
been enabled since.  Obviously a dead end.  Get of it.

Signed-off-by: Markus Armbruster <address@hidden>
---
 hw/i386/pc.c         | 30 ------------------------------
 hw/i386/pc_piix.c    |  4 ----
 hw/i386/pc_q35.c     |  3 ---
 include/hw/i386/pc.h |  1 -
 4 files changed, 38 deletions(-)

diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 9e58982..8fa8d2f 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -1066,35 +1066,6 @@ typedef struct PcRomPciInfo {
     uint64_t w64_max;
 } PcRomPciInfo;
 
-static void pc_fw_cfg_guest_info(PcGuestInfo *guest_info)
-{
-    PcRomPciInfo *info;
-    Object *pci_info;
-    bool ambiguous = false;
-
-    if (!guest_info->has_pci_info || !guest_info->fw_cfg) {
-        return;
-    }
-    pci_info = object_resolve_path_type("", TYPE_PCI_HOST_BRIDGE, &ambiguous);
-    g_assert(!ambiguous);
-    if (!pci_info) {
-        return;
-    }
-
-    info = g_malloc(sizeof *info);
-    info->w32_min = cpu_to_le64(object_property_get_int(pci_info,
-                                PCI_HOST_PROP_PCI_HOLE_START, NULL));
-    info->w32_max = cpu_to_le64(object_property_get_int(pci_info,
-                                PCI_HOST_PROP_PCI_HOLE_END, NULL));
-    info->w64_min = cpu_to_le64(object_property_get_int(pci_info,
-                                PCI_HOST_PROP_PCI_HOLE64_START, NULL));
-    info->w64_max = cpu_to_le64(object_property_get_int(pci_info,
-                                PCI_HOST_PROP_PCI_HOLE64_END, NULL));
-    /* 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;
@@ -1106,7 +1077,6 @@ 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);
     acpi_setup(&guest_info_state->info);
 }
 
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index 4f22be8..12d8c26 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -59,7 +59,6 @@ static const int ide_iobase[MAX_IDE_BUS] = { 0x1f0, 0x170 };
 static const int ide_iobase2[MAX_IDE_BUS] = { 0x3f6, 0x376 };
 static const int ide_irq[MAX_IDE_BUS] = { 14, 15 };
 
-static bool has_pci_info;
 static bool has_acpi_build = true;
 static int legacy_acpi_table_size;
 static bool smbios_defaults = true;
@@ -166,7 +165,6 @@ static void pc_init1(MachineState *machine,
     guest_info->has_acpi_build = has_acpi_build;
     guest_info->legacy_acpi_table_size = legacy_acpi_table_size;
 
-    guest_info->has_pci_info = has_pci_info;
     guest_info->isapc_ram_fw = !pci_enabled;
     guest_info->has_reserved_memory = has_reserved_memory;
 
@@ -340,7 +338,6 @@ static void pc_compat_1_7(MachineState *machine)
 static void pc_compat_1_6(MachineState *machine)
 {
     pc_compat_1_7(machine);
-    has_pci_info = false;
     rom_file_has_mr = false;
     has_acpi_build = false;
 }
@@ -422,7 +419,6 @@ static void pc_init_pci_no_kvmclock(MachineState *machine)
 
 static void pc_init_isa(MachineState *machine)
 {
-    has_pci_info = false;
     has_acpi_build = false;
     smbios_defaults = false;
     gigabyte_align = false;
diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
index c39ee98..3f8a465 100644
--- a/hw/i386/pc_q35.c
+++ b/hw/i386/pc_q35.c
@@ -49,7 +49,6 @@
 /* ICH9 AHCI has 6 ports */
 #define MAX_SATA_PORTS     6
 
-static bool has_pci_info;
 static bool has_acpi_build = true;
 static bool smbios_defaults = true;
 static bool smbios_legacy_mode;
@@ -150,7 +149,6 @@ static void pc_q35_init(MachineState *machine)
     }
 
     guest_info = pc_guest_info_init(below_4g_mem_size, above_4g_mem_size);
-    guest_info->has_pci_info = has_pci_info;
     guest_info->isapc_ram_fw = false;
     guest_info->has_acpi_build = has_acpi_build;
     guest_info->has_reserved_memory = has_reserved_memory;
@@ -296,7 +294,6 @@ static void pc_compat_1_7(MachineState *machine)
 static void pc_compat_1_6(MachineState *machine)
 {
     pc_compat_1_7(machine);
-    has_pci_info = false;
     rom_file_has_mr = false;
     has_acpi_build = false;
 }
diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index 863eefb..7eb742d 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -85,7 +85,6 @@ typedef struct PcPciInfo {
 #define ACPI_PM_PROP_GPE0_BLK_LEN "gpe0_blk_len"
 
 struct PcGuestInfo {
-    bool has_pci_info;
     bool isapc_ram_fw;
     hwaddr ram_size, ram_size_below_4g;
     unsigned apic_id_limit;
-- 
1.9.3