From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from firstgate.proxmox.com (firstgate.proxmox.com [212.224.123.68]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by lists.proxmox.com (Postfix) with ESMTPS id CED4ABA381 for ; Wed, 13 Dec 2023 17:59:24 +0100 (CET) Received: from firstgate.proxmox.com (localhost [127.0.0.1]) by firstgate.proxmox.com (Proxmox) with ESMTP id A9287E30A for ; Wed, 13 Dec 2023 17:58:54 +0100 (CET) Received: from proxmox-new.maurer-it.com (proxmox-new.maurer-it.com [94.136.29.106]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by firstgate.proxmox.com (Proxmox) with ESMTPS for ; Wed, 13 Dec 2023 17:58:53 +0100 (CET) Received: from proxmox-new.maurer-it.com (localhost.localdomain [127.0.0.1]) by proxmox-new.maurer-it.com (Proxmox) with ESMTP id 7E80A4704D for ; Wed, 13 Dec 2023 17:58:53 +0100 (CET) From: Filip Schauer To: pve-devel@lists.proxmox.com Date: Wed, 13 Dec 2023 17:58:48 +0100 Message-Id: <20231213165848.107768-1-f.schauer@proxmox.com> X-Mailer: git-send-email 2.39.2 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SPAM-LEVEL: Spam detection results: 0 AWL -0.171 Adjusted score from AWL reputation of From: address BAYES_00 -1.9 Bayes spam probability is 0 to 1% DMARC_MISSING 0.1 Missing DMARC policy KAM_DMARC_STATUS 0.01 Test Rule for DKIM or SPF Failure with Strict Alignment SPF_HELO_NONE 0.001 SPF: HELO does not publish an SPF Record SPF_PASS -0.001 SPF: sender matches SPF record T_SCC_BODY_TEXT_LINE -0.01 - URIBL_BLOCKED 0.001 ADMINISTRATOR NOTICE: The query to URIBL was blocked. See http://wiki.apache.org/spamassassin/DnsBlocklists#dnsbl-block for more information. [qemuserver.pm, cpuconfig.pm] Subject: [pve-devel] [PATCH v5 qemu-server] Prevent starting a 32-bit VM using a 64-bit OVMF BIOS X-BeenThere: pve-devel@lists.proxmox.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: Proxmox VE development discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 13 Dec 2023 16:59:24 -0000 Instead of starting a VM with a 32-bit CPU type and a 64-bit OVMF image, throw an error before starting the VM telling the user that OVMF is not supported on 32-bit CPU types. To obtain a list of 32-bit CPU types, refer to builtin_x86_defs in target/i386/cpu.c of QEMU. Exclude any entries that have the long mode feature (CPUID_EXT2_LM). Signed-off-by: Filip Schauer --- Changes since v2: * Simplify the check whether a 32-bit CPU type is used in combination with OVMF Changes since v3: * Move the cputypes_32bit list from QemuServer.pm to CPUConfig.pm * Turn cputypes_32bit into a hash for lookup * Create a helper get_cpu_bitness function in CPUConfig.pm * Describe how the list of 32-bit CPU types was obtained Changes since v4: * Remove parentheses around post-if in get_cpu_bitness PVE/QemuServer.pm | 5 ++++- PVE/QemuServer/CPUConfig.pm | 32 ++++++++++++++++++++++++++++++++ 2 files changed, 36 insertions(+), 1 deletion(-) diff --git a/PVE/QemuServer.pm b/PVE/QemuServer.pm index 2063e66..5bfa11f 100644 --- a/PVE/QemuServer.pm +++ b/PVE/QemuServer.pm @@ -52,7 +52,7 @@ use PVE::QemuConfig; use PVE::QemuServer::Helpers qw(config_aware_timeout min_version windows_version); use PVE::QemuServer::Cloudinit; use PVE::QemuServer::CGroup; -use PVE::QemuServer::CPUConfig qw(print_cpu_device get_cpu_options); +use PVE::QemuServer::CPUConfig qw(print_cpu_device get_cpu_options get_cpu_bitness); use PVE::QemuServer::Drive qw(is_valid_drivename drive_is_cloudinit drive_is_cdrom drive_is_read_only parse_drive print_drive); use PVE::QemuServer::Machine; use PVE::QemuServer::Memory qw(get_current_memory); @@ -3689,6 +3689,9 @@ sub config_to_command { } if ($conf->{bios} && $conf->{bios} eq 'ovmf') { + die "OVMF (UEFI) BIOS is not supported on 32-bit CPU types\n" + if get_cpu_bitness($conf, $arch) == 32; + my ($code_drive_str, $var_drive_str) = print_ovmf_drive_commandlines($conf, $storecfg, $vmid, $arch, $q35, $version_guard); push $cmd->@*, '-drive', $code_drive_str; diff --git a/PVE/QemuServer/CPUConfig.pm b/PVE/QemuServer/CPUConfig.pm index ca2946b..908e47a 100644 --- a/PVE/QemuServer/CPUConfig.pm +++ b/PVE/QemuServer/CPUConfig.pm @@ -12,6 +12,7 @@ use base qw(PVE::SectionConfig Exporter); our @EXPORT_OK = qw( print_cpu_device get_cpu_options +get_cpu_bitness ); # under certain race-conditions, this module might be loaded before pve-cluster @@ -57,6 +58,17 @@ my $depreacated_cpu_map = { 'Icelake-Client-noTSX' => 'Icelake-Server-noTSX', }; +my $cputypes_32bit = { + '486' => 1, + 'pentium' => 1, + 'pentium2' => 1, + 'pentium3' => 1, + 'coreduo' => 1, + 'athlon' => 1, + 'kvm32' => 1, + 'qemu32' => 1, +}; + my $cpu_vendor_list = { # Intel CPUs 486 => 'GenuineIntel', @@ -719,6 +731,26 @@ sub get_cpu_from_running_vm { return $1; } +sub get_cpu_bitness { + my ($conf, $arch) = @_; + + return if !$conf or !$arch; + + if ($arch eq 'x86_64') { + if (my $cpu_prop_str = $conf->{cpu}) { + my $cpu = PVE::JSONSchema::parse_property_string('pve-vm-cpu-conf', $cpu_prop_str) + or die "Cannot parse cpu description: $cpu_prop_str\n"; + + my $cputype = $cpu->{cputype}; + return 32 if $cputypes_32bit->{$cputype}; + } + + return 64; + } + + return 64 if $arch eq 'aarch64'; +} + __PACKAGE__->register(); __PACKAGE__->init(); -- 2.39.2