Re: [libvirt PATCH v2 00/20] Invalidate the cpu flags cache on host cpuid mismatch

Many things can affect the availability of cpu features (e.g. software upgrades, kernel versions, kernel command line, etc.) and invalidate the cached capabilities without notice. Add CPUID information to the capabilities cache. Fixes https://bugzilla.redhat.com/show_bug.cgi?id=1953389. V1: https://listman.redhat.com/archives/libvir-list/2021-August/msg00138.html Tim Wiederhake (20): cpu_x86: Simplify x86ParseCPUID cpu_x86: Simplify x86ParseMSR cpu_x86: Add x86ParseDataItemList cpu: Change virCPUArchDataParse to take xmlNodePtr cpu: Split up virCPUDataParse cpu: Add virCPUDataIsIdentical cpu_x86: Implement virCPUDataIsIdentical for x86 cpu_arm: No need to protect macro definitions cpu_arm: Implement virCPUDataIsIdentical for arm cpu_ppc64: Implement virCPUDataIsIdentical for ppc64 cpu: Add virCPUDataNewCopy cpu_x86: Implement virCPUDataNewCopy for x86 cpu_arm: Implement virCPUDataNewCopy for arm cpu_ppc64: Implement virCPUDataNewCopy for ppc64 virhostcpu: Add virHostCPUGetCPUID cpu_x86: Add virCPUDataGetHost cpu_x86: Implement virCPUDataGetHost for x86 virQEMUCaps: Add host cpuid information virQEMUCapsCachePriv: Add host cpuid information qemu: Invalidate capabilities cache on host cpuid mismatch src/cpu/cpu.c | 97 +++++++++++- src/cpu/cpu.h | 27 +++- src/cpu/cpu_arm.c | 54 ++++++- src/cpu/cpu_ppc64.c | 44 ++++++ src/cpu/cpu_x86.c | 296 +++++++++++++++++++++++------------ src/libvirt_private.syms | 5 + src/qemu/qemu_capabilities.c | 33 +++- src/qemu/qemu_capspriv.h | 3 +- src/util/virhostcpu.c | 43 +++++ src/util/virhostcpu.h | 2 + tests/qemucapsprobe.c | 2 +- 11 files changed, 486 insertions(+), 120 deletions(-)