From de796d93f59d363409dfd9e186ccd64a21f92204 Mon Sep 17 00:00:00 2001 From: Eduardo Habkost Date: Fri, 30 Oct 2015 17:36:07 -0200 Subject: [PATCH] pc: Set hw_version on all machine classes In 2012, QEMU had a bug where it exposed QEMU version information to the guest, meaning a QEMU upgrade would expose different hardware to the guest OS even if the same machine-type is being used. The bug was fixed by commit 93bfef4c6e4b23caea9d51e1099d06433d8835a4, on all machines up to pc-1.0. But we kept introducing the same bug on all newer machines since then. That means we are breaking guest ABI every time QEMU was upgraded. Fix this by setting the hw_version on all PC machines, making sure the hardware won't change when upgrading QEMU. Note that QEMU_VERSION was "1.0" in QEMU 1.0, but starting on QEMU 1.1.0, it started following the "x.y.0" pattern. We have to follow it, to make sure we use the right QEMU_VERSION string from each QEMU release. The 2.5 machine classes could have hw_version unset, because the default value for qemu_get_version() is QEMU_VERSION. But I decided to set it explicitly to QEMU_VERSION so we don't forget to update it to "2.5.0" after we release 2.5.0 and create a 2.6 machine class. Reported-by: Laszlo Ersek Reviewed-by: Laszlo Ersek Signed-off-by: Eduardo Habkost Message-Id: <1446233769-7892-2-git-send-email-ehabkost@redhat.com> Signed-off-by: Paolo Bonzini --- hw/i386/pc_piix.c | 13 +++++++++++++ hw/i386/pc_q35.c | 10 ++++++++++ 2 files changed, 23 insertions(+) diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c index 393dcc4544..07d0baa0fb 100644 --- a/hw/i386/pc_piix.c +++ b/hw/i386/pc_piix.c @@ -472,6 +472,7 @@ static void pc_i440fx_machine_options(MachineClass *m) static void pc_i440fx_2_5_machine_options(MachineClass *m) { pc_i440fx_machine_options(m); + m->hw_version = QEMU_VERSION; m->alias = "pc"; m->is_default = 1; } @@ -484,6 +485,7 @@ static void pc_i440fx_2_4_machine_options(MachineClass *m) { PCMachineClass *pcmc = PC_MACHINE_CLASS(m); pc_i440fx_2_5_machine_options(m); + m->hw_version = "2.4.0"; m->alias = NULL; m->is_default = 0; pcmc->broken_reserved_end = true; @@ -497,6 +499,7 @@ DEFINE_I440FX_MACHINE(v2_4, "pc-i440fx-2.4", NULL, static void pc_i440fx_2_3_machine_options(MachineClass *m) { pc_i440fx_2_4_machine_options(m); + m->hw_version = "2.3.0"; m->alias = NULL; m->is_default = 0; SET_MACHINE_COMPAT(m, PC_COMPAT_2_3); @@ -509,6 +512,7 @@ DEFINE_I440FX_MACHINE(v2_3, "pc-i440fx-2.3", pc_compat_2_3, static void pc_i440fx_2_2_machine_options(MachineClass *m) { pc_i440fx_2_3_machine_options(m); + m->hw_version = "2.2.0"; SET_MACHINE_COMPAT(m, PC_COMPAT_2_2); } @@ -519,6 +523,7 @@ DEFINE_I440FX_MACHINE(v2_2, "pc-i440fx-2.2", pc_compat_2_2, static void pc_i440fx_2_1_machine_options(MachineClass *m) { pc_i440fx_2_2_machine_options(m); + m->hw_version = "2.1.0"; m->default_display = NULL; SET_MACHINE_COMPAT(m, PC_COMPAT_2_1); } @@ -531,6 +536,7 @@ DEFINE_I440FX_MACHINE(v2_1, "pc-i440fx-2.1", pc_compat_2_1, static void pc_i440fx_2_0_machine_options(MachineClass *m) { pc_i440fx_2_1_machine_options(m); + m->hw_version = "2.0.0"; SET_MACHINE_COMPAT(m, PC_COMPAT_2_0); } @@ -541,6 +547,7 @@ DEFINE_I440FX_MACHINE(v2_0, "pc-i440fx-2.0", pc_compat_2_0, static void pc_i440fx_1_7_machine_options(MachineClass *m) { pc_i440fx_2_0_machine_options(m); + m->hw_version = "1.7.0"; m->default_machine_opts = NULL; SET_MACHINE_COMPAT(m, PC_COMPAT_1_7); } @@ -552,6 +559,7 @@ DEFINE_I440FX_MACHINE(v1_7, "pc-i440fx-1.7", pc_compat_1_7, static void pc_i440fx_1_6_machine_options(MachineClass *m) { pc_i440fx_1_7_machine_options(m); + m->hw_version = "1.6.0"; SET_MACHINE_COMPAT(m, PC_COMPAT_1_6); } @@ -562,6 +570,7 @@ DEFINE_I440FX_MACHINE(v1_6, "pc-i440fx-1.6", pc_compat_1_6, static void pc_i440fx_1_5_machine_options(MachineClass *m) { pc_i440fx_1_6_machine_options(m); + m->hw_version = "1.5.0"; SET_MACHINE_COMPAT(m, PC_COMPAT_1_5); } @@ -572,6 +581,7 @@ DEFINE_I440FX_MACHINE(v1_5, "pc-i440fx-1.5", pc_compat_1_5, static void pc_i440fx_1_4_machine_options(MachineClass *m) { pc_i440fx_1_5_machine_options(m); + m->hw_version = "1.4.0"; m->hot_add_cpu = NULL; SET_MACHINE_COMPAT(m, PC_COMPAT_1_4); } @@ -604,6 +614,7 @@ DEFINE_I440FX_MACHINE(v1_4, "pc-i440fx-1.4", pc_compat_1_4, static void pc_i440fx_1_3_machine_options(MachineClass *m) { pc_i440fx_1_4_machine_options(m); + m->hw_version = "1.3.0"; SET_MACHINE_COMPAT(m, PC_COMPAT_1_3); } @@ -642,6 +653,7 @@ DEFINE_I440FX_MACHINE(v1_3, "pc-1.3", pc_compat_1_3, static void pc_i440fx_1_2_machine_options(MachineClass *m) { pc_i440fx_1_3_machine_options(m); + m->hw_version = "1.2.0"; SET_MACHINE_COMPAT(m, PC_COMPAT_1_2); } @@ -684,6 +696,7 @@ DEFINE_I440FX_MACHINE(v1_2, "pc-1.2", pc_compat_1_2, static void pc_i440fx_1_1_machine_options(MachineClass *m) { pc_i440fx_1_2_machine_options(m); + m->hw_version = "1.1.0"; SET_MACHINE_COMPAT(m, PC_COMPAT_1_1); } diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c index 2f8f3963c4..0fdae09bdb 100644 --- a/hw/i386/pc_q35.c +++ b/hw/i386/pc_q35.c @@ -373,6 +373,7 @@ static void pc_q35_machine_options(MachineClass *m) static void pc_q35_2_5_machine_options(MachineClass *m) { pc_q35_machine_options(m); + m->hw_version = QEMU_VERSION; m->alias = "q35"; } @@ -383,6 +384,7 @@ static void pc_q35_2_4_machine_options(MachineClass *m) { PCMachineClass *pcmc = PC_MACHINE_CLASS(m); pc_q35_2_5_machine_options(m); + m->hw_version = "2.4.0"; m->alias = NULL; pcmc->broken_reserved_end = true; SET_MACHINE_COMPAT(m, PC_COMPAT_2_4); @@ -395,6 +397,7 @@ DEFINE_Q35_MACHINE(v2_4, "pc-q35-2.4", NULL, static void pc_q35_2_3_machine_options(MachineClass *m) { pc_q35_2_4_machine_options(m); + m->hw_version = "2.3.0"; m->no_floppy = 0; m->no_tco = 1; m->alias = NULL; @@ -408,6 +411,7 @@ DEFINE_Q35_MACHINE(v2_3, "pc-q35-2.3", pc_compat_2_3, static void pc_q35_2_2_machine_options(MachineClass *m) { pc_q35_2_3_machine_options(m); + m->hw_version = "2.2.0"; SET_MACHINE_COMPAT(m, PC_COMPAT_2_2); } @@ -418,6 +422,7 @@ DEFINE_Q35_MACHINE(v2_2, "pc-q35-2.2", pc_compat_2_2, static void pc_q35_2_1_machine_options(MachineClass *m) { pc_q35_2_2_machine_options(m); + m->hw_version = "2.1.0"; m->default_display = NULL; SET_MACHINE_COMPAT(m, PC_COMPAT_2_1); } @@ -429,6 +434,7 @@ DEFINE_Q35_MACHINE(v2_1, "pc-q35-2.1", pc_compat_2_1, static void pc_q35_2_0_machine_options(MachineClass *m) { pc_q35_2_1_machine_options(m); + m->hw_version = "2.0.0"; SET_MACHINE_COMPAT(m, PC_COMPAT_2_0); } @@ -439,6 +445,7 @@ DEFINE_Q35_MACHINE(v2_0, "pc-q35-2.0", pc_compat_2_0, static void pc_q35_1_7_machine_options(MachineClass *m) { pc_q35_2_0_machine_options(m); + m->hw_version = "1.7.0"; m->default_machine_opts = NULL; SET_MACHINE_COMPAT(m, PC_COMPAT_1_7); } @@ -450,6 +457,7 @@ DEFINE_Q35_MACHINE(v1_7, "pc-q35-1.7", pc_compat_1_7, static void pc_q35_1_6_machine_options(MachineClass *m) { pc_q35_machine_options(m); + m->hw_version = "1.6.0"; SET_MACHINE_COMPAT(m, PC_COMPAT_1_6); } @@ -460,6 +468,7 @@ DEFINE_Q35_MACHINE(v1_6, "pc-q35-1.6", pc_compat_1_6, static void pc_q35_1_5_machine_options(MachineClass *m) { pc_q35_1_6_machine_options(m); + m->hw_version = "1.5.0"; SET_MACHINE_COMPAT(m, PC_COMPAT_1_5); } @@ -470,6 +479,7 @@ DEFINE_Q35_MACHINE(v1_5, "pc-q35-1.5", pc_compat_1_5, static void pc_q35_1_4_machine_options(MachineClass *m) { pc_q35_1_5_machine_options(m); + m->hw_version = "1.4.0"; m->hot_add_cpu = NULL; SET_MACHINE_COMPAT(m, PC_COMPAT_1_4); }