* [PATCH v2 qemu-server] cpu config: use static CPU model list shipped by QEMU package if available
@ 2026-05-15 14:32 Fiona Ebner
0 siblings, 0 replies; only message in thread
From: Fiona Ebner @ 2026-05-15 14:32 UTC (permalink / raw)
To: pve-devel
Suggested-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
---
Changes in v2:
* Drop pve-qemu-kvm patch that already got applied
* The shipped file is not a single line anymore (was changed upon
applying), so need to correctly untaint for multi-line here.
* Use PVE::File rather than PVE::Tools for file_get_contents().
* Update FIXME comment to use the new standard schema for major
version reminders.
src/PVE/QemuServer/CPUConfig.pm | 238 +++++++++++++++++---------------
1 file changed, 127 insertions(+), 111 deletions(-)
diff --git a/src/PVE/QemuServer/CPUConfig.pm b/src/PVE/QemuServer/CPUConfig.pm
index fb9af277..356a061d 100644
--- a/src/PVE/QemuServer/CPUConfig.pm
+++ b/src/PVE/QemuServer/CPUConfig.pm
@@ -7,6 +7,7 @@ use JSON;
use PVE::JSONSchema qw(json_bool);
use PVE::Cluster qw(cfs_register_file cfs_read_file);
+use PVE::File;
use PVE::ProcFSTools;
use PVE::RESTEnvironment qw(log_warn);
use PVE::Tools qw(run_command);
@@ -104,119 +105,134 @@ my $all_cpu_models;
# helper to make it easier for testing
# initializes both '$cpu_models_by_arch' and '$all_cpu_models'
sub initialize_cpu_models {
- $cpu_models_by_arch = {
- x86_64 => {
- # Intel CPUs
- 486 => 'GenuineIntel',
- pentium => 'GenuineIntel',
- pentium2 => 'GenuineIntel',
- pentium3 => 'GenuineIntel',
- coreduo => 'GenuineIntel',
- core2duo => 'GenuineIntel',
- Conroe => 'GenuineIntel',
- Penryn => 'GenuineIntel',
- Nehalem => 'GenuineIntel',
- 'Nehalem-IBRS' => 'GenuineIntel',
- Westmere => 'GenuineIntel',
- 'Westmere-IBRS' => 'GenuineIntel',
- SandyBridge => 'GenuineIntel',
- 'SandyBridge-IBRS' => 'GenuineIntel',
- IvyBridge => 'GenuineIntel',
- 'IvyBridge-IBRS' => 'GenuineIntel',
- Haswell => 'GenuineIntel',
- 'Haswell-IBRS' => 'GenuineIntel',
- 'Haswell-noTSX' => 'GenuineIntel',
- 'Haswell-noTSX-IBRS' => 'GenuineIntel',
- Broadwell => 'GenuineIntel',
- 'Broadwell-IBRS' => 'GenuineIntel',
- 'Broadwell-noTSX' => 'GenuineIntel',
- 'Broadwell-noTSX-IBRS' => 'GenuineIntel',
- 'Skylake-Client' => 'GenuineIntel',
- 'Skylake-Client-IBRS' => 'GenuineIntel',
- 'Skylake-Client-noTSX-IBRS' => 'GenuineIntel',
- 'Skylake-Client-v4' => 'GenuineIntel',
- 'Skylake-Server' => 'GenuineIntel',
- 'Skylake-Server-IBRS' => 'GenuineIntel',
- 'Skylake-Server-noTSX-IBRS' => 'GenuineIntel',
- 'Skylake-Server-v4' => 'GenuineIntel',
- 'Skylake-Server-v5' => 'GenuineIntel',
- 'Cascadelake-Server' => 'GenuineIntel',
- 'Cascadelake-Server-v2' => 'GenuineIntel',
- 'Cascadelake-Server-noTSX' => 'GenuineIntel',
- 'Cascadelake-Server-v4' => 'GenuineIntel',
- 'Cascadelake-Server-v5' => 'GenuineIntel',
- 'Cooperlake' => 'GenuineIntel',
- 'Cooperlake-v2' => 'GenuineIntel',
- KnightsMill => 'GenuineIntel',
- 'Icelake-Client' => 'GenuineIntel', # depreacated, removed with QEMU 7.1
- 'Icelake-Client-noTSX' => 'GenuineIntel', # depreacated, removed with QEMU 7.1
- 'Icelake-Server' => 'GenuineIntel',
- 'Icelake-Server-noTSX' => 'GenuineIntel',
- 'Icelake-Server-v3' => 'GenuineIntel',
- 'Icelake-Server-v4' => 'GenuineIntel',
- 'Icelake-Server-v5' => 'GenuineIntel',
- 'Icelake-Server-v6' => 'GenuineIntel',
- 'Icelake-Server-v7' => 'GenuineIntel',
- 'SapphireRapids' => 'GenuineIntel',
- 'SapphireRapids-v2' => 'GenuineIntel',
- 'SapphireRapids-v3' => 'GenuineIntel',
- 'SapphireRapids-v4' => 'GenuineIntel',
- 'GraniteRapids' => 'GenuineIntel',
- 'GraniteRapids-v2' => 'GenuineIntel',
- 'GraniteRapids-v3' => 'GenuineIntel',
- 'SierraForest' => 'GenuineIntel',
- 'SierraForest-v2' => 'GenuineIntel',
- 'SierraForest-v3' => 'GenuineIntel',
- 'ClearwaterForest' => 'GenuineIntel',
+ my $cpu_models_x86_64_file = '/usr/share/kvm/cpu-models-x86_64.json';
+ my $cpu_models_aarch64_file = '/usr/share/kvm/cpu-models-aarch64.json';
- # AMD CPUs
- athlon => 'AuthenticAMD',
- phenom => 'AuthenticAMD',
- Opteron_G1 => 'AuthenticAMD',
- Opteron_G2 => 'AuthenticAMD',
- Opteron_G3 => 'AuthenticAMD',
- Opteron_G4 => 'AuthenticAMD',
- Opteron_G5 => 'AuthenticAMD',
- EPYC => 'AuthenticAMD',
- 'EPYC-IBPB' => 'AuthenticAMD',
- 'EPYC-v3' => 'AuthenticAMD',
- 'EPYC-v4' => 'AuthenticAMD',
- 'EPYC-v5' => 'AuthenticAMD',
- 'EPYC-Rome' => 'AuthenticAMD',
- 'EPYC-Rome-v2' => 'AuthenticAMD',
- 'EPYC-Rome-v3' => 'AuthenticAMD',
- 'EPYC-Rome-v4' => 'AuthenticAMD',
- 'EPYC-Rome-v5' => 'AuthenticAMD',
- 'EPYC-Milan' => 'AuthenticAMD',
- 'EPYC-Milan-v2' => 'AuthenticAMD',
- 'EPYC-Milan-v3' => 'AuthenticAMD',
- 'EPYC-Genoa' => 'AuthenticAMD',
- 'EPYC-Genoa-v2' => 'AuthenticAMD',
- 'EPYC-Turin' => 'AuthenticAMD',
+ if (-f $cpu_models_x86_64_file) { # QEMU package is new enough to ship static model files
+ my $json_text = PVE::File::file_get_contents($cpu_models_x86_64_file);
+ ($json_text) = $json_text =~ /(.*)/s; # untaint multi-line string
+ $cpu_models_by_arch->{'x86_64'} = eval { decode_json($json_text) }
+ or die "unable to decode contents of '$cpu_models_x86_64_file' - $@\n";
- # generic types, use vendor from host node
- kvm32 => 'default',
- kvm64 => 'default',
- qemu32 => 'default',
- qemu64 => 'default',
- max => 'default',
- },
- aarch64 => {
- 'a64fx' => 'ARM',
- 'cortex-a35' => 'ARM',
- 'cortex-a53' => 'ARM',
- 'cortex-a55' => 'ARM',
- 'cortex-a57' => 'ARM',
- 'cortex-a710' => 'ARM',
- 'cortex-a72' => 'ARM',
- 'cortex-a76' => 'ARM',
- 'neoverse-n1' => 'ARM',
- 'neoverse-n2' => 'ARM',
- 'neoverse-v1' => 'ARM',
- # 32 bit and deprecated models were not added
- max => 'default',
- },
- };
+ $json_text = PVE::File::file_get_contents($cpu_models_aarch64_file);
+ ($json_text) = $json_text =~ /(.*)/s; # untaint multi-line string
+ $cpu_models_by_arch->{'aarch64'} = eval { decode_json($json_text) }
+ or die "unable to decode contents of '$cpu_models_aarch64_file' - $@\n";
+ } else { # FIXME: MAJOR VERSION: remove hard-coded list
+ $cpu_models_by_arch = {
+ x86_64 => {
+ # Intel CPUs
+ 486 => 'GenuineIntel',
+ pentium => 'GenuineIntel',
+ pentium2 => 'GenuineIntel',
+ pentium3 => 'GenuineIntel',
+ coreduo => 'GenuineIntel',
+ core2duo => 'GenuineIntel',
+ Conroe => 'GenuineIntel',
+ Penryn => 'GenuineIntel',
+ Nehalem => 'GenuineIntel',
+ 'Nehalem-IBRS' => 'GenuineIntel',
+ Westmere => 'GenuineIntel',
+ 'Westmere-IBRS' => 'GenuineIntel',
+ SandyBridge => 'GenuineIntel',
+ 'SandyBridge-IBRS' => 'GenuineIntel',
+ IvyBridge => 'GenuineIntel',
+ 'IvyBridge-IBRS' => 'GenuineIntel',
+ Haswell => 'GenuineIntel',
+ 'Haswell-IBRS' => 'GenuineIntel',
+ 'Haswell-noTSX' => 'GenuineIntel',
+ 'Haswell-noTSX-IBRS' => 'GenuineIntel',
+ Broadwell => 'GenuineIntel',
+ 'Broadwell-IBRS' => 'GenuineIntel',
+ 'Broadwell-noTSX' => 'GenuineIntel',
+ 'Broadwell-noTSX-IBRS' => 'GenuineIntel',
+ 'Skylake-Client' => 'GenuineIntel',
+ 'Skylake-Client-IBRS' => 'GenuineIntel',
+ 'Skylake-Client-noTSX-IBRS' => 'GenuineIntel',
+ 'Skylake-Client-v4' => 'GenuineIntel',
+ 'Skylake-Server' => 'GenuineIntel',
+ 'Skylake-Server-IBRS' => 'GenuineIntel',
+ 'Skylake-Server-noTSX-IBRS' => 'GenuineIntel',
+ 'Skylake-Server-v4' => 'GenuineIntel',
+ 'Skylake-Server-v5' => 'GenuineIntel',
+ 'Cascadelake-Server' => 'GenuineIntel',
+ 'Cascadelake-Server-v2' => 'GenuineIntel',
+ 'Cascadelake-Server-noTSX' => 'GenuineIntel',
+ 'Cascadelake-Server-v4' => 'GenuineIntel',
+ 'Cascadelake-Server-v5' => 'GenuineIntel',
+ 'Cooperlake' => 'GenuineIntel',
+ 'Cooperlake-v2' => 'GenuineIntel',
+ KnightsMill => 'GenuineIntel',
+ 'Icelake-Client' => 'GenuineIntel', # depreacated, removed with QEMU 7.1
+ 'Icelake-Client-noTSX' => 'GenuineIntel', # depreacated, removed with QEMU 7.1
+ 'Icelake-Server' => 'GenuineIntel',
+ 'Icelake-Server-noTSX' => 'GenuineIntel',
+ 'Icelake-Server-v3' => 'GenuineIntel',
+ 'Icelake-Server-v4' => 'GenuineIntel',
+ 'Icelake-Server-v5' => 'GenuineIntel',
+ 'Icelake-Server-v6' => 'GenuineIntel',
+ 'Icelake-Server-v7' => 'GenuineIntel',
+ 'SapphireRapids' => 'GenuineIntel',
+ 'SapphireRapids-v2' => 'GenuineIntel',
+ 'SapphireRapids-v3' => 'GenuineIntel',
+ 'SapphireRapids-v4' => 'GenuineIntel',
+ 'GraniteRapids' => 'GenuineIntel',
+ 'GraniteRapids-v2' => 'GenuineIntel',
+ 'GraniteRapids-v3' => 'GenuineIntel',
+ 'SierraForest' => 'GenuineIntel',
+ 'SierraForest-v2' => 'GenuineIntel',
+ 'SierraForest-v3' => 'GenuineIntel',
+ 'ClearwaterForest' => 'GenuineIntel',
+
+ # AMD CPUs
+ athlon => 'AuthenticAMD',
+ phenom => 'AuthenticAMD',
+ Opteron_G1 => 'AuthenticAMD',
+ Opteron_G2 => 'AuthenticAMD',
+ Opteron_G3 => 'AuthenticAMD',
+ Opteron_G4 => 'AuthenticAMD',
+ Opteron_G5 => 'AuthenticAMD',
+ EPYC => 'AuthenticAMD',
+ 'EPYC-IBPB' => 'AuthenticAMD',
+ 'EPYC-v3' => 'AuthenticAMD',
+ 'EPYC-v4' => 'AuthenticAMD',
+ 'EPYC-v5' => 'AuthenticAMD',
+ 'EPYC-Rome' => 'AuthenticAMD',
+ 'EPYC-Rome-v2' => 'AuthenticAMD',
+ 'EPYC-Rome-v3' => 'AuthenticAMD',
+ 'EPYC-Rome-v4' => 'AuthenticAMD',
+ 'EPYC-Rome-v5' => 'AuthenticAMD',
+ 'EPYC-Milan' => 'AuthenticAMD',
+ 'EPYC-Milan-v2' => 'AuthenticAMD',
+ 'EPYC-Milan-v3' => 'AuthenticAMD',
+ 'EPYC-Genoa' => 'AuthenticAMD',
+ 'EPYC-Genoa-v2' => 'AuthenticAMD',
+ 'EPYC-Turin' => 'AuthenticAMD',
+
+ # generic types, use vendor from host node
+ kvm32 => 'default',
+ kvm64 => 'default',
+ qemu32 => 'default',
+ qemu64 => 'default',
+ max => 'default',
+ },
+ aarch64 => {
+ 'a64fx' => 'ARM',
+ 'cortex-a35' => 'ARM',
+ 'cortex-a53' => 'ARM',
+ 'cortex-a55' => 'ARM',
+ 'cortex-a57' => 'ARM',
+ 'cortex-a710' => 'ARM',
+ 'cortex-a72' => 'ARM',
+ 'cortex-a76' => 'ARM',
+ 'neoverse-n1' => 'ARM',
+ 'neoverse-n2' => 'ARM',
+ 'neoverse-v1' => 'ARM',
+ # 32 bit and deprecated models were not added
+ max => 'default',
+ },
+ };
+ }
my $host_arch = get_host_arch();
# The host CPU model only exists if the arch matches
--
2.47.3
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2026-05-15 14:32 [PATCH v2 qemu-server] cpu config: use static CPU model list shipped by QEMU package if available Fiona Ebner
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