From: Arnd Bergmann <arnd@xxxxxxxx> While looking at 32-bit arm cleanups, I came across some related topics on x86 and ended up making a series for those as well. Primarily this is about running 32-bit kernels on 64-bit hardware, which usually works but should probably be discouraged more clearly by only providing support for features that are used on real 32-bit hardware: I found only a few 2003-era high-end servers (HP DL740 and DL760 G2) that were the only possible remaining uses of HIGHMEM64G and BIGSMP after the removal of 32-bit NUMA machines in 2014. Similary, there is only one generation of hardware with support for VT-x. All these features can be removed without hurting users. In the CPU selection, building a 32-bit kernel optimized for AMD K8 or Intel Core2 is anachronistic, so instead only 32-bit CPU types need to be offered as optimization targets. The "generic" target on 64-bit turned out to be slightly broken, so I included a fix for that as well, replacing the compiler default target with an intentional selection between the useful levels. Arnd Bergmann (11): x86/Kconfig: Geode CPU has cmpxchg8b x86: drop 32-bit "bigsmp" machine support x86: Kconfig.cpu: split out 64-bit atom x86: split CPU selection into 32-bit and 64-bit x86: remove HIGHMEM64G support x86: drop SWIOTLB and PHYS_ADDR_T_64BIT for PAE x86: drop support for CONFIG_HIGHPTE x86: document X86_INTEL_MID as 64-bit-only x86: rework CONFIG_GENERIC_CPU compiler flags x86: remove old STA2x11 support x86: drop 32-bit KVM host support Documentation/admin-guide/kdump/kdump.rst | 4 - .../admin-guide/kernel-parameters.txt | 11 - Documentation/arch/x86/usb-legacy-support.rst | 11 +- arch/x86/Kconfig | 119 ++------- arch/x86/Kconfig.cpu | 130 +++++++--- arch/x86/Makefile | 10 +- arch/x86/Makefile_32.cpu | 3 +- arch/x86/configs/xen.config | 2 - arch/x86/include/asm/page_32_types.h | 4 +- arch/x86/include/asm/pgalloc.h | 5 - arch/x86/include/asm/sta2x11.h | 13 - arch/x86/include/asm/vermagic.h | 4 - arch/x86/kernel/apic/Makefile | 3 - arch/x86/kernel/apic/apic.c | 3 - arch/x86/kernel/apic/bigsmp_32.c | 105 -------- arch/x86/kernel/apic/local.h | 13 - arch/x86/kernel/apic/probe_32.c | 29 --- arch/x86/kernel/head32.c | 3 - arch/x86/kvm/Kconfig | 6 +- arch/x86/kvm/Makefile | 4 +- arch/x86/kvm/cpuid.c | 9 +- arch/x86/kvm/emulate.c | 34 +-- arch/x86/kvm/fpu.h | 4 - arch/x86/kvm/hyperv.c | 5 +- arch/x86/kvm/i8254.c | 4 - arch/x86/kvm/kvm_cache_regs.h | 2 - arch/x86/kvm/kvm_emulate.h | 8 - arch/x86/kvm/lapic.c | 4 - arch/x86/kvm/mmu.h | 4 - arch/x86/kvm/mmu/mmu.c | 134 ---------- arch/x86/kvm/mmu/mmu_internal.h | 9 - arch/x86/kvm/mmu/paging_tmpl.h | 9 - arch/x86/kvm/mmu/spte.h | 5 - arch/x86/kvm/mmu/tdp_mmu.h | 4 - arch/x86/kvm/smm.c | 19 -- arch/x86/kvm/svm/sev.c | 2 - arch/x86/kvm/svm/svm.c | 23 +- arch/x86/kvm/svm/vmenter.S | 20 -- arch/x86/kvm/trace.h | 4 - arch/x86/kvm/vmx/main.c | 2 - arch/x86/kvm/vmx/nested.c | 24 +- arch/x86/kvm/vmx/vmcs.h | 2 - arch/x86/kvm/vmx/vmenter.S | 25 +- arch/x86/kvm/vmx/vmx.c | 117 +-------- arch/x86/kvm/vmx/vmx.h | 23 +- arch/x86/kvm/vmx/vmx_ops.h | 7 - arch/x86/kvm/vmx/x86_ops.h | 2 - arch/x86/kvm/x86.c | 74 +----- arch/x86/kvm/x86.h | 4 - arch/x86/kvm/xen.c | 61 ++--- arch/x86/mm/init_32.c | 9 +- arch/x86/mm/pgtable.c | 29 +-- arch/x86/pci/Makefile | 2 - arch/x86/pci/sta2x11-fixup.c | 233 ------------------ include/linux/mm.h | 2 +- 55 files changed, 185 insertions(+), 1216 deletions(-) delete mode 100644 arch/x86/include/asm/sta2x11.h delete mode 100644 arch/x86/kernel/apic/bigsmp_32.c delete mode 100644 arch/x86/pci/sta2x11-fixup.c -- 2.39.5 To: x86@xxxxxxxxxx Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Cc: Ingo Molnar <mingo@xxxxxxxxxx> Cc: Borislav Petkov <bp@xxxxxxxxx> Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx> Cc: "H. Peter Anvin" <hpa@xxxxxxxxx> Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> Cc: Andy Shevchenko <andy@xxxxxxxxxx> Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx> Cc: Sean Christopherson <seanjc@xxxxxxxxxx> Cc: Davide Ciminaghi <ciminaghi@xxxxxxxxx> Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx> Cc: kvm@xxxxxxxxxxxxxxx
