[PATCH v2 2/2] build: fail when recognized CPUID flags list changes

[Arthur Bied-Charreton <a.bied-charreton@proxmox.com>]

Check in the current recognized CPUID flags list and fail the build if
the list newly generated by parse-cpu-flags.pl differs from it.

This forces new or removed flags to be manually reviewed instead of
being silently picked up on QEMU bumps and mirrors the existing
approach for CPU models.

Suggested-by: Fiona Ebner <f.ebner@proxmox.com>
Signed-off-by: Arthur Bied-Charreton <a.bied-charreton@proxmox.com>
---
 debian/recognized-CPUID-flags-x86_64 | 430 +++++++++++++++++++++++++++
 debian/rules                         |   4 +
 2 files changed, 434 insertions(+)
 create mode 100644 debian/recognized-CPUID-flags-x86_64

diff --git a/debian/recognized-CPUID-flags-x86_64 b/debian/recognized-CPUID-flags-x86_64
new file mode 100644
index 0000000..0a0119f
--- /dev/null
+++ b/debian/recognized-CPUID-flags-x86_64
@@ -0,0 +1,430 @@
+3dnow
+3dnowext
+3dnowprefetch
+abm
+ace2
+ace2-en
+acpi
+adx
+aes
+amd-no-ssb
+amd-psfd
+amd-ssbd
+amd-stibp
+amx-avx512
+amx-bf16
+amx-bf16-alias
+amx-complex
+amx-complex-alias
+amx-fp16
+amx-fp16-alias
+amx-fp8
+amx-int8
+amx-int8-alias
+amx-movrs
+amx-tf32
+amx-tile
+apic
+apx-nci-ndd-nf
+apxf
+arat
+arch-capabilities
+arch-lbr
+auto-ibrs
+avic
+avx
+avx-ifma
+avx-ne-convert
+avx-vnni
+avx-vnni-int16
+avx-vnni-int8
+avx10
+avx10-128
+avx10-256
+avx10-512
+avx10-vnni-int
+avx2
+avx512-4fmaps
+avx512-4vnniw
+avx512-bf16
+avx512-fp16
+avx512-vp2intersect
+avx512-vpopcntdq
+avx512bitalg
+avx512bw
+avx512cd
+avx512dq
+avx512er
+avx512f
+avx512ifma
+avx512pf
+avx512vbmi
+avx512vbmi2
+avx512vl
+avx512vnni
+bhi-ctrl
+bhi-no
+bmi1
+bmi2
+bus-lock-detect
+cet-ibt
+cet-ss
+cid
+cldemote
+clflush
+clflushopt
+clwb
+clzero
+cmov
+cmp-legacy
+cmpccxadd
+core-capability
+cr8legacy
+cx16
+cx8
+dca
+ddpd-u
+de
+decodeassists
+ds
+ds-cpl
+dtes64
+eraps
+erms
+est
+extapic
+f16c
+fb-clear
+fbsdp-no
+fdp-excptn-only
+flush-l1d
+flushbyasid
+fma
+fma4
+fpu
+fred
+fs-gs-base-ns
+fsgsbase
+fsrc
+fsrm
+fsrs
+full-width-write
+fxsr
+fxsr-opt
+fzrm
+gds-no
+gfni
+gmet
+hle
+ht
+hv-avic
+hv-crash
+hv-emsr-bitmap
+hv-enforce-cpuid
+hv-evmcs
+hv-frequencies
+hv-ipi
+hv-passthrough
+hv-reenlightenment
+hv-relaxed
+hv-reset
+hv-runtime
+hv-stimer
+hv-stimer-direct
+hv-syndbg
+hv-synic
+hv-time
+hv-tlbflush
+hv-tlbflush-direct
+hv-tlbflush-ext
+hv-vapic
+hv-vpindex
+hv-xmm-input
+hypervisor
+ia64
+ibpb
+ibpb-brtype
+ibrs
+ibrs-all
+ibs
+intel-psfd
+intel-pt
+intel-pt-lip
+invpcid
+invtsc
+ipred-ctrl
+its-no
+kvm-asyncpf
+kvm-asyncpf-int
+kvm-asyncpf-vmexit
+kvm-hint-dedicated
+kvm-mmu
+kvm-msi-ext-dest-id
+kvm-nopiodelay
+kvm-poll-control
+kvm-pv-eoi
+kvm-pv-ipi
+kvm-pv-sched-yield
+kvm-pv-tlb-flush
+kvm-pv-unhalt
+kvm-steal-time
+kvmclock
+kvmclock-stable-bit
+la57
+lahf-lm
+lam
+lbrv
+lfence-always-serializing
+lkgs
+lm
+lwp
+mca
+mcdt-no
+mce
+md-clear
+mds-no
+misalignsse
+mmx
+mmxext
+monitor
+movbe
+movdir64b
+movdiri
+movrs
+mpx
+msr
+msr-imm
+mtrr
+no-nested-data-bp
+nodeid-msr
+npt
+nrip-save
+null-sel-clr-base
+nx
+osvw
+overflow-recov
+pae
+pat
+pause-filter
+pbe
+pbrsb-no
+pcid
+pclmulqdq
+pcommit
+pdcm
+pdpe1gb
+perfctr-core
+perfctr-nb
+perfmon-v2
+pfthreshold
+pge
+phe
+phe-en
+pks
+pku
+pmm
+pmm-en
+pn
+pni
+popcnt
+prefetchi
+prefetchiti
+pschange-mc-no
+psdp-no
+pse
+pse36
+rdctl-no
+rdpid
+rdrand
+rdseed
+rdtscp
+rfds-clear
+rfds-no
+rrsba-ctrl
+rsba
+rtm
+sbdr-ssdp-no
+sbpb
+sep
+serialize
+sgx
+sgx-aex-notify
+sgx-debug
+sgx-edeccssa
+sgx-exinfo
+sgx-kss
+sgx-mode64
+sgx-provisionkey
+sgx-tokenkey
+sgx1
+sgx2
+sgxlc
+sha-ni
+sha512
+skinit
+skip-l1dfl-vmentry
+sm3
+sm4
+smap
+smep
+smx
+spec-ctrl
+split-lock-detect
+srso-no
+srso-user-kernel-no
+ss
+ssb-no
+ssbd
+sse
+sse2
+sse4.1
+sse4.2
+sse4a
+ssse3
+stibp
+stibp-always-on
+succor
+svm
+svm-lock
+svme-addr-chk
+syscall
+taa-no
+tbm
+tce
+tm
+tm2
+topoext
+tsa-l1-no
+tsa-sq-no
+tsc
+tsc-adjust
+tsc-deadline
+tsc-scale
+tsx-ctrl
+tsx-ldtrk
+umip
+v-vmsave-vmload
+vaes
+verw-clear
+vgif
+virt-ssbd
+vmcb-clean
+vme
+vmx
+vmx-activity-hlt
+vmx-activity-shutdown
+vmx-activity-wait-sipi
+vmx-any-errcode
+vmx-apicv-register
+vmx-apicv-vid
+vmx-apicv-x2apic
+vmx-apicv-xapic
+vmx-cr3-load-noexit
+vmx-cr3-store-noexit
+vmx-cr8-load-exit
+vmx-cr8-store-exit
+vmx-desc-exit
+vmx-enable-user-wait-pause
+vmx-encls-exit
+vmx-entry-ia32e-mode
+vmx-entry-load-bndcfgs
+vmx-entry-load-cet
+vmx-entry-load-efer
+vmx-entry-load-fred
+vmx-entry-load-pat
+vmx-entry-load-perf-global-ctrl
+vmx-entry-load-pkrs
+vmx-entry-load-rtit-ctl
+vmx-entry-noload-debugctl
+vmx-ept
+vmx-ept-1gb
+vmx-ept-2mb
+vmx-ept-advanced-exitinfo
+vmx-ept-execonly
+vmx-eptad
+vmx-eptp-switching
+vmx-exit-ack-intr
+vmx-exit-clear-bndcfgs
+vmx-exit-clear-rtit-ctl
+vmx-exit-load-efer
+vmx-exit-load-pat
+vmx-exit-load-perf-global-ctrl
+vmx-exit-load-pkrs
+vmx-exit-nosave-debugctl
+vmx-exit-save-cet
+vmx-exit-save-efer
+vmx-exit-save-pat
+vmx-exit-save-preemption-timer
+vmx-exit-secondary-ctls
+vmx-flexpriority
+vmx-hlt-exit
+vmx-ins-outs
+vmx-intr-exit
+vmx-invept
+vmx-invept-all-context
+vmx-invept-single-context
+vmx-invept-single-context-noglobals
+vmx-invlpg-exit
+vmx-invpcid-exit
+vmx-invvpid
+vmx-invvpid-all-context
+vmx-invvpid-single-addr
+vmx-io-bitmap
+vmx-io-exit
+vmx-mbec
+vmx-monitor-exit
+vmx-movdr-exit
+vmx-msr-bitmap
+vmx-mtf
+vmx-mwait-exit
+vmx-nested-exception
+vmx-nmi-exit
+vmx-page-walk-4
+vmx-page-walk-5
+vmx-pause-exit
+vmx-ple
+vmx-pml
+vmx-posted-intr
+vmx-preemption-timer
+vmx-rdpmc-exit
+vmx-rdrand-exit
+vmx-rdseed-exit
+vmx-rdtsc-exit
+vmx-rdtscp-exit
+vmx-secondary-ctls
+vmx-shadow-vmcs
+vmx-store-lma
+vmx-true-ctls
+vmx-tsc-offset
+vmx-tsc-scaling
+vmx-unrestricted-guest
+vmx-vintr-pending
+vmx-vmfunc
+vmx-vmwrite-vmexit-fields
+vmx-vnmi
+vmx-vnmi-pending
+vmx-vpid
+vmx-wbinvd-exit
+vmx-xsaves
+vmx-zero-len-inject
+vnmi
+vpclmulqdq
+waitpkg
+wbnoinvd
+wdt
+wrmsrns
+x2apic
+xcrypt
+xcrypt-en
+xfd
+xgetbv1
+xop
+xsave
+xsavec
+xsaveerptr
+xsaveopt
+xsaves
+xstore
+xstore-en
+xtpr
+zero-fcs-fds
diff --git a/debian/rules b/debian/rules
index b2eed71..1d57a98 100755
--- a/debian/rules
+++ b/debian/rules
@@ -124,6 +124,10 @@ install: build
 
 	# CPU flags are static for QEMU version, allows avoiding more costly checks
 	./debian/parse-cpu-flags.pl $(destdir)/usr/bin/qemu-system-x86_64 > $(flagfile)
+	# NOTE: If the diff fails here after upgrading the QEMU submodule, check which new flags
+	# are to be picked up and which are to be excluded, adapt to other changes and commit the
+	# new expected file (and parse-cpu-flags.pl script if that changed as well).
+	diff -u $(flagfile) ./debian/recognized-CPUID-flags-x86_64
 
 	# Supported machine versions are static for a given QEMU binary.
 	$(destdir)/usr/bin/qemu-system-x86_64 -machine help | ./debian/parse-machines.pl > $(machine_file_x86_64)
-- 
2.47.3