From 27bd50b8d7fe2c674cd737518ff0ea4b3920be09 Mon Sep 17 00:00:00 2001 From: Laszlo Ersek Date: Wed, 5 Nov 2014 16:04:11 +0100 Subject: [PATCH 13/15] well-defined listing order for machine types Message-id: <1415203453-7318-2-git-send-email-lersek@redhat.com> Patchwork-id: 62142 O-Subject: [RHEV-7.1 qemu-kvm-rhev PATCH 1/3] well-defined listing order for machine types Bugzilla: 1145042 RH-Acked-by: Michael S. Tsirkin RH-Acked-by: dgibson RH-Acked-by: Andrew Jones RH-Acked-by: Marcel Apfelbaum Commit 261747f1 ("vl: Use MachineClass instead of global QEMUMachine list") broke the ordering of the machine types in the user-visible output of qemu-system-XXXX -M \? This occurred because registration was rebased from a manually maintained linked list to GLib hash tables: qemu_register_machine() type_register() type_register_internal() type_table_add() g_hash_table_insert() and because the listing was rebased accordingly, from the traversal of the list to the traversal of the hash table (rendered as an ad-hoc list): machine_parse() object_class_get_list(TYPE_MACHINE) object_class_foreach() g_hash_table_foreach() The current order is a "random" one, for practical purposes, which is annoying for users. Introduce new members QEMUMachine.family and MachineClass.family, allowing machine types to be "clustered". Introduce a comparator function that establishes a total ordering between machine types, ordering machine types in the same family next to each other. In machine_parse(), list the supported machine types sorted with the comparator function. The comparator function: - sorts whole families before standalone machine types, - sorts whole families between each other in alphabetically increasing order, - sorts machine types inside the same family in alphabetically decreasing order, - sorts standalone machine types between each other in alphabetically increasing order. After this patch, all machine types are considered standalone, and accordingly, the output is alphabetically ascending. This will be refined in the following patches. Effects on the x86_64 output: Before: > Supported machines are: > pc-0.13 Standard PC (i440FX + PIIX, 1996) > pc-i440fx-2.0 Standard PC (i440FX + PIIX, 1996) > pc-1.0 Standard PC (i440FX + PIIX, 1996) > pc-i440fx-2.1 Standard PC (i440FX + PIIX, 1996) > pc-q35-1.7 Standard PC (Q35 + ICH9, 2009) > pc-1.1 Standard PC (i440FX + PIIX, 1996) > pc-0.14 Standard PC (i440FX + PIIX, 1996) > pc-q35-2.0 Standard PC (Q35 + ICH9, 2009) > pc-i440fx-1.4 Standard PC (i440FX + PIIX, 1996) > pc-i440fx-1.5 Standard PC (i440FX + PIIX, 1996) > pc-0.15 Standard PC (i440FX + PIIX, 1996) > pc-q35-1.4 Standard PC (Q35 + ICH9, 2009) > isapc ISA-only PC > pc Standard PC (i440FX + PIIX, 1996) (alias of pc-i440fx-2.2) > pc-i440fx-2.2 Standard PC (i440FX + PIIX, 1996) (default) > pc-1.2 Standard PC (i440FX + PIIX, 1996) > pc-0.10 Standard PC (i440FX + PIIX, 1996) > pc-0.11 Standard PC (i440FX + PIIX, 1996) > pc-q35-2.1 Standard PC (Q35 + ICH9, 2009) > q35 Standard PC (Q35 + ICH9, 2009) (alias of pc-q35-2.2) > pc-q35-2.2 Standard PC (Q35 + ICH9, 2009) > pc-i440fx-1.6 Standard PC (i440FX + PIIX, 1996) > pc-i440fx-1.7 Standard PC (i440FX + PIIX, 1996) > none empty machine > pc-q35-1.5 Standard PC (Q35 + ICH9, 2009) > pc-q35-1.6 Standard PC (Q35 + ICH9, 2009) > pc-0.12 Standard PC (i440FX + PIIX, 1996) > pc-1.3 Standard PC (i440FX + PIIX, 1996) After: > Supported machines are: > isapc ISA-only PC > none empty machine > pc-0.10 Standard PC (i440FX + PIIX, 1996) > pc-0.11 Standard PC (i440FX + PIIX, 1996) > pc-0.12 Standard PC (i440FX + PIIX, 1996) > pc-0.13 Standard PC (i440FX + PIIX, 1996) > pc-0.14 Standard PC (i440FX + PIIX, 1996) > pc-0.15 Standard PC (i440FX + PIIX, 1996) > pc-1.0 Standard PC (i440FX + PIIX, 1996) > pc-1.1 Standard PC (i440FX + PIIX, 1996) > pc-1.2 Standard PC (i440FX + PIIX, 1996) > pc-1.3 Standard PC (i440FX + PIIX, 1996) > pc-i440fx-1.4 Standard PC (i440FX + PIIX, 1996) > pc-i440fx-1.5 Standard PC (i440FX + PIIX, 1996) > pc-i440fx-1.6 Standard PC (i440FX + PIIX, 1996) > pc-i440fx-1.7 Standard PC (i440FX + PIIX, 1996) > pc-i440fx-2.0 Standard PC (i440FX + PIIX, 1996) > pc-i440fx-2.1 Standard PC (i440FX + PIIX, 1996) > pc Standard PC (i440FX + PIIX, 1996) (alias of pc-i440fx-2.2) > pc-i440fx-2.2 Standard PC (i440FX + PIIX, 1996) (default) > pc-q35-1.4 Standard PC (Q35 + ICH9, 2009) > pc-q35-1.5 Standard PC (Q35 + ICH9, 2009) > pc-q35-1.6 Standard PC (Q35 + ICH9, 2009) > pc-q35-1.7 Standard PC (Q35 + ICH9, 2009) > pc-q35-2.0 Standard PC (Q35 + ICH9, 2009) > pc-q35-2.1 Standard PC (Q35 + ICH9, 2009) > q35 Standard PC (Q35 + ICH9, 2009) (alias of pc-q35-2.2) > pc-q35-2.2 Standard PC (Q35 + ICH9, 2009) Effects on the aarch64 output: Before: > Supported machines are: > lm3s811evb Stellaris LM3S811EVB > canon-a1100 Canon PowerShot A1100 IS > vexpress-a15 ARM Versatile Express for Cortex-A15 > vexpress-a9 ARM Versatile Express for Cortex-A9 > xilinx-zynq-a9 Xilinx Zynq Platform Baseboard for Cortex-A9 > connex Gumstix Connex (PXA255) > n800 Nokia N800 tablet aka. RX-34 (OMAP2420) > lm3s6965evb Stellaris LM3S6965EVB > versatileab ARM Versatile/AB (ARM926EJ-S) > borzoi Borzoi PDA (PXA270) > tosa Tosa PDA (PXA255) > cheetah Palm Tungsten|E aka. Cheetah PDA (OMAP310) > midway Calxeda Midway (ECX-2000) > mainstone Mainstone II (PXA27x) > n810 Nokia N810 tablet aka. RX-44 (OMAP2420) > terrier Terrier PDA (PXA270) > highbank Calxeda Highbank (ECX-1000) > cubieboard cubietech cubieboard > sx1-v1 Siemens SX1 (OMAP310) V1 > sx1 Siemens SX1 (OMAP310) V2 > realview-eb-mpcore ARM RealView Emulation Baseboard (ARM11MPCore) > kzm ARM KZM Emulation Baseboard (ARM1136) > akita Akita PDA (PXA270) > z2 Zipit Z2 (PXA27x) > musicpal Marvell 88w8618 / MusicPal (ARM926EJ-S) > realview-pb-a8 ARM RealView Platform Baseboard for Cortex-A8 > versatilepb ARM Versatile/PB (ARM926EJ-S) > realview-eb ARM RealView Emulation Baseboard (ARM926EJ-S) > realview-pbx-a9 ARM RealView Platform Baseboard Explore for Cortex-A9 > spitz Spitz PDA (PXA270) > none empty machine > virt ARM Virtual Machine > collie Collie PDA (SA-1110) > smdkc210 Samsung SMDKC210 board (Exynos4210) > verdex Gumstix Verdex (PXA270) > nuri Samsung NURI board (Exynos4210) > integratorcp ARM Integrator/CP (ARM926EJ-S) After: > Supported machines are: > akita Akita PDA (PXA270) > borzoi Borzoi PDA (PXA270) > canon-a1100 Canon PowerShot A1100 IS > cheetah Palm Tungsten|E aka. Cheetah PDA (OMAP310) > collie Collie PDA (SA-1110) > connex Gumstix Connex (PXA255) > cubieboard cubietech cubieboard > highbank Calxeda Highbank (ECX-1000) > integratorcp ARM Integrator/CP (ARM926EJ-S) > kzm ARM KZM Emulation Baseboard (ARM1136) > lm3s6965evb Stellaris LM3S6965EVB > lm3s811evb Stellaris LM3S811EVB > mainstone Mainstone II (PXA27x) > midway Calxeda Midway (ECX-2000) > musicpal Marvell 88w8618 / MusicPal (ARM926EJ-S) > n800 Nokia N800 tablet aka. RX-34 (OMAP2420) > n810 Nokia N810 tablet aka. RX-44 (OMAP2420) > none empty machine > nuri Samsung NURI board (Exynos4210) > realview-eb ARM RealView Emulation Baseboard (ARM926EJ-S) > realview-eb-mpcore ARM RealView Emulation Baseboard (ARM11MPCore) > realview-pb-a8 ARM RealView Platform Baseboard for Cortex-A8 > realview-pbx-a9 ARM RealView Platform Baseboard Explore for Cortex-A9 > smdkc210 Samsung SMDKC210 board (Exynos4210) > spitz Spitz PDA (PXA270) > sx1 Siemens SX1 (OMAP310) V2 > sx1-v1 Siemens SX1 (OMAP310) V1 > terrier Terrier PDA (PXA270) > tosa Tosa PDA (PXA255) > verdex Gumstix Verdex (PXA270) > versatileab ARM Versatile/AB (ARM926EJ-S) > versatilepb ARM Versatile/PB (ARM926EJ-S) > vexpress-a15 ARM Versatile Express for Cortex-A15 > vexpress-a9 ARM Versatile Express for Cortex-A9 > virt ARM Virtual Machine > xilinx-zynq-a9 Xilinx Zynq Platform Baseboard for Cortex-A9 > z2 Zipit Z2 (PXA27x) Signed-off-by: Laszlo Ersek Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin Reviewed-by: Paolo Bonzini Reviewed-by: Marcel Apfelbaum Acked-by: David Gibson (cherry picked from commit 2709f263952bab66fc8f971c04d151216b177336) Signed-off-by: Laszlo Ersek Signed-off-by: Miroslav Rezanina --- hw/i386/pc.c | 1 + include/hw/boards.h | 2 ++ vl.c | 38 +++++++++++++++++++++++++++++++++++++- 3 files changed, 40 insertions(+), 1 deletion(-) diff --git a/hw/i386/pc.c b/hw/i386/pc.c index 07b0c8e..fc177d3 100644 --- a/hw/i386/pc.c +++ b/hw/i386/pc.c @@ -1521,6 +1521,7 @@ static void pc_generic_machine_class_init(ObjectClass *oc, void *data) MachineClass *mc = MACHINE_CLASS(oc); QEMUMachine *qm = data; + mc->family = qm->family; mc->name = qm->name; mc->alias = qm->alias; mc->desc = qm->desc; diff --git a/include/hw/boards.h b/include/hw/boards.h index f8c81e1..30bd80c 100644 --- a/include/hw/boards.h +++ b/include/hw/boards.h @@ -20,6 +20,7 @@ typedef void QEMUMachineHotAddCPUFunc(const int64_t id, Error **errp); typedef int QEMUMachineGetKvmtypeFunc(const char *arg); struct QEMUMachine { + const char *family; /* NULL iff @name identifies a standalone machtype */ const char *name; const char *alias; const char *desc; @@ -77,6 +78,7 @@ struct MachineClass { ObjectClass parent_class; /*< public >*/ + const char *family; /* NULL iff @name identifies a standalone machtype */ const char *name; const char *alias; const char *desc; diff --git a/vl.c b/vl.c index dfc48b7..bfe543e 100644 --- a/vl.c +++ b/vl.c @@ -1561,6 +1561,7 @@ static void machine_class_init(ObjectClass *oc, void *data) MachineClass *mc = MACHINE_CLASS(oc); QEMUMachine *qm = data; + mc->family = qm->family; mc->name = qm->name; mc->alias = qm->alias; mc->desc = qm->desc; @@ -2643,7 +2644,41 @@ static int debugcon_parse(const char *devname) return 0; } -static MachineClass *machine_parse(const char *name) +static gint machine_class_cmp(gconstpointer a, gconstpointer b) +{ + const MachineClass *mc1 = a, *mc2 = b; + int res; + + if (mc1->family == NULL) { + if (mc2->family == NULL) { + /* Compare standalone machine types against each other; they sort + * in increasing order. + */ + return strcmp(object_class_get_name(OBJECT_CLASS(mc1)), + object_class_get_name(OBJECT_CLASS(mc2))); + } + + /* Standalone machine types sort after families. */ + return 1; + } + + if (mc2->family == NULL) { + /* Families sort before standalone machine types. */ + return -1; + } + + /* Families sort between each other alphabetically increasingly. */ + res = strcmp(mc1->family, mc2->family); + if (res != 0) { + return res; + } + + /* Within the same family, machine types sort in decreasing order. */ + return strcmp(object_class_get_name(OBJECT_CLASS(mc2)), + object_class_get_name(OBJECT_CLASS(mc1))); +} + + static MachineClass *machine_parse(const char *name) { MachineClass *mc = NULL; GSList *el, *machines = object_class_get_list(TYPE_MACHINE, false); @@ -2659,6 +2694,7 @@ static MachineClass *machine_parse(const char *name) error_printf("Use -machine help to list supported machines!\n"); } else { printf("Supported machines are:\n"); + machines = g_slist_sort(machines, machine_class_cmp); for (el = machines; el; el = el->next) { MachineClass *mc = el->data; if (mc->alias) { -- 1.8.3.1