I'm announcing the release of the 5.15.57 kernel. All users of the 5.15 kernel series must upgrade. The updated 5.15.y git tree can be found at: git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git linux-5.15.y and can be browsed at the normal kernel.org git web browser: https://git.kernel.org/?p=linux/kernel/git/stable/linux-stable.git;a=summary thanks, greg k-h ------------ Documentation/admin-guide/kernel-parameters.txt | 25 Makefile | 9 arch/um/kernel/um_arch.c | 8 arch/x86/Kconfig | 103 ++- arch/x86/Makefile | 2 arch/x86/entry/Makefile | 2 arch/x86/entry/calling.h | 72 ++ arch/x86/entry/entry.S | 22 arch/x86/entry/entry_32.S | 2 arch/x86/entry/entry_64.S | 88 ++- arch/x86/entry/entry_64_compat.S | 21 arch/x86/entry/vdso/Makefile | 1 arch/x86/entry/vsyscall/vsyscall_emu_64.S | 9 arch/x86/include/asm/GEN-for-each-reg.h | 14 arch/x86/include/asm/alternative.h | 2 arch/x86/include/asm/asm-prototypes.h | 18 arch/x86/include/asm/cpufeatures.h | 12 arch/x86/include/asm/disabled-features.h | 21 arch/x86/include/asm/linkage.h | 8 arch/x86/include/asm/msr-index.h | 13 arch/x86/include/asm/nospec-branch.h | 134 ++-- arch/x86/include/asm/static_call.h | 17 arch/x86/include/asm/traps.h | 2 arch/x86/include/asm/unwind_hints.h | 14 arch/x86/kernel/alternative.c | 260 ++++++++ arch/x86/kernel/cpu/amd.c | 46 + arch/x86/kernel/cpu/bugs.c | 475 +++++++++++++--- arch/x86/kernel/cpu/common.c | 61 +- arch/x86/kernel/cpu/cpu.h | 2 arch/x86/kernel/cpu/hygon.c | 6 arch/x86/kernel/cpu/scattered.c | 1 arch/x86/kernel/ftrace.c | 7 arch/x86/kernel/head_32.S | 1 arch/x86/kernel/head_64.S | 5 arch/x86/kernel/module.c | 15 arch/x86/kernel/process.c | 2 arch/x86/kernel/relocate_kernel_32.S | 25 arch/x86/kernel/relocate_kernel_64.S | 23 arch/x86/kernel/static_call.c | 49 + arch/x86/kernel/traps.c | 19 arch/x86/kernel/vmlinux.lds.S | 23 arch/x86/kvm/emulate.c | 33 - arch/x86/kvm/svm/vmenter.S | 18 arch/x86/kvm/vmx/nested.c | 2 arch/x86/kvm/vmx/run_flags.h | 8 arch/x86/kvm/vmx/vmenter.S | 164 ++--- arch/x86/kvm/vmx/vmx.c | 76 +- arch/x86/kvm/vmx/vmx.h | 6 arch/x86/kvm/x86.c | 4 arch/x86/lib/memmove_64.S | 7 arch/x86/lib/retpoline.S | 133 ++-- arch/x86/mm/mem_encrypt_boot.S | 10 arch/x86/net/bpf_jit_comp.c | 179 ++---- arch/x86/net/bpf_jit_comp32.c | 22 arch/x86/platform/efi/efi_thunk_64.S | 5 arch/x86/xen/setup.c | 6 arch/x86/xen/xen-asm.S | 30 - arch/x86/xen/xen-head.S | 5 arch/x86/xen/xen-ops.h | 6 drivers/base/cpu.c | 8 drivers/idle/intel_idle.c | 43 + include/linux/cpu.h | 2 include/linux/kvm_host.h | 2 include/linux/objtool.h | 9 scripts/Makefile.build | 1 scripts/link-vmlinux.sh | 3 security/Kconfig | 11 tools/arch/x86/include/asm/cpufeatures.h | 12 tools/arch/x86/include/asm/disabled-features.h | 21 tools/arch/x86/include/asm/msr-index.h | 13 tools/include/linux/objtool.h | 9 tools/objtool/arch/x86/decode.c | 145 ---- tools/objtool/builtin-check.c | 4 tools/objtool/check.c | 701 ++++++++++++++++++++---- tools/objtool/elf.c | 84 -- tools/objtool/include/objtool/arch.h | 3 tools/objtool/include/objtool/builtin.h | 2 tools/objtool/include/objtool/cfi.h | 2 tools/objtool/include/objtool/check.h | 10 tools/objtool/include/objtool/elf.h | 9 tools/objtool/include/objtool/objtool.h | 1 tools/objtool/objtool.c | 1 tools/objtool/orc_gen.c | 15 tools/objtool/special.c | 8 84 files changed, 2519 insertions(+), 953 deletions(-) Alexandre Chartre (2): x86/bugs: Report AMD retbleed vulnerability x86/bugs: Add AMD retbleed= boot parameter Andrew Cooper (1): x86/cpu/amd: Enumerate BTC_NO Arnaldo Carvalho de Melo (2): tools arch x86: Sync the msr-index.h copy with the kernel sources tools headers cpufeatures: Sync with the kernel sources Ben Hutchings (1): x86/xen: Fix initialisation in hypercall_page after rethunk Greg Kroah-Hartman (1): Linux 5.15.57 Jiri Slaby (1): x86/asm/32: Fix ANNOTATE_UNRET_SAFE use on 32-bit Josh Poimboeuf (12): x86/bugs: Do IBPB fallback check only once x86/speculation: Fix RSB filling with CONFIG_RETPOLINE=n x86/speculation: Fix firmware entry SPEC_CTRL handling x86/speculation: Fix SPEC_CTRL write on SMT state change x86/speculation: Use cached host SPEC_CTRL value for guest entry/exit x86/speculation: Remove x86_spec_ctrl_mask objtool: Re-add UNWIND_HINT_{SAVE_RESTORE} KVM: VMX: Flatten __vmx_vcpu_run() KVM: VMX: Convert launched argument to flags KVM: VMX: Prevent guest RSB poisoning attacks with eIBRS KVM: VMX: Fix IBRS handling after vmexit x86/speculation: Fill RSB on vmexit for IBRS Kim Phillips (3): x86/sev: Avoid using __x86_return_thunk x86/bugs: Enable STIBP for JMP2RET x86/bugs: Remove apostrophe typo Konrad Rzeszutek Wilk (1): x86/kexec: Disable RET on kexec Lai Jiangshan (4): x86/traps: Use pt_regs directly in fixup_bad_iret() x86/entry: Switch the stack after error_entry() returns x86/entry: Move PUSH_AND_CLEAR_REGS out of error_entry() x86/entry: Don't call error_entry() for XENPV Nathan Chancellor (1): x86/speculation: Use DECLARE_PER_CPU for x86_spec_ctrl_current Paolo Bonzini (1): KVM: emulate: do not adjust size of fastop and setcc subroutines Pawan Gupta (3): x86/speculation: Add spectre_v2=ibrs option to support Kernel IBRS x86/bugs: Add Cannon lake to RETBleed affected CPU list x86/speculation: Disable RRSBA behavior Peter Zijlstra (50): objtool: Classify symbols objtool: Explicitly avoid self modifying code in .altinstr_replacement objtool: Shrink struct instruction objtool,x86: Replace alternatives with .retpoline_sites objtool: Introduce CFI hash x86/retpoline: Remove unused replacement symbols x86/asm: Fix register order x86/asm: Fixup odd GEN-for-each-reg.h usage x86/retpoline: Move the retpoline thunk declarations to nospec-branch.h x86/retpoline: Create a retpoline thunk array x86/alternative: Implement .retpoline_sites support x86/alternative: Handle Jcc __x86_indirect_thunk_\reg x86/alternative: Try inline spectre_v2=retpoline,amd x86/alternative: Add debug prints to apply_retpolines() bpf,x86: Simplify computing label offsets bpf,x86: Respect X86_FEATURE_RETPOLINE* objtool: Default ignore INT3 for unreachable x86/entry: Remove skip_r11rcx x86/kvm/vmx: Make noinstr clean x86/cpufeatures: Move RETPOLINE flags to word 11 x86/retpoline: Cleanup some #ifdefery x86/retpoline: Swizzle retpoline thunk x86/retpoline: Use -mfunction-return x86: Undo return-thunk damage x86,objtool: Create .return_sites x86,static_call: Use alternative RET encoding x86/ftrace: Use alternative RET encoding x86/bpf: Use alternative RET encoding x86/kvm: Fix SETcc emulation for return thunks x86/vsyscall_emu/64: Don't use RET in vsyscall emulation x86: Use return-thunk in asm code x86/entry: Avoid very early RET objtool: Treat .text.__x86.* as noinstr x86: Add magic AMD return-thunk x86/bugs: Keep a per-CPU IA32_SPEC_CTRL value x86/bugs: Optimize SPEC_CTRL MSR writes x86/bugs: Split spectre_v2_select_mitigation() and spectre_v2_user_select_mitigation() x86/bugs: Report Intel retbleed vulnerability intel_idle: Disable IBRS during long idle objtool: Update Retpoline validation x86/xen: Rename SYS* entry points x86/xen: Add UNTRAIN_RET x86/bugs: Add retbleed=ibpb objtool: Add entry UNRET validation x86/cpu/amd: Add Spectral Chicken x86/common: Stamp out the stepping madness x86/retbleed: Add fine grained Kconfig knobs x86/entry: Move PUSH_AND_CLEAR_REGS() back into error_entry um: Add missing apply_returns() x86: Use -mindirect-branch-cs-prefix for RETPOLINE builds Thadeu Lima de Souza Cascardo (6): x86/realmode: build with -D__DISABLE_EXPORTS objtool: skip non-text sections when adding return-thunk sites x86/entry: Add kernel IBRS implementation x86/bugs: Do not enable IBPB-on-entry when IBPB is not supported efi/x86: use naked RET on mixed mode call wrapper x86/kvm: fix FASTOP_SIZE when return thunks are enabled Thomas Gleixner (1): x86/static_call: Serialize __static_call_fixup() properly
