Folks! This is the second part of the rework series. Part 1 can be found here:
https://lore.kernel.org/r/[email protected] The series has a total of 138 patches and is split into 5 parts. The base for this series is: git://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git entry-v4-part-1 The full series with all parts applied is available here: git://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git entry-v4-part-5 The second part, i.e. this series is available from: git://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git entry-v4-part-2 This part contains the modifications for the syscall entry code and the adjustment of the KVM code: - Move the non entry related ASM code into the regular text section so it is not part of the protected section - Move the low level entry C code into the .noinstr.text section - Make the interaction with lockdep, RCU and tracing correct - Move the KVM guest_enter/exit() handling strict vs. RCU and instrumentation protection. It's more or less the same problem as the syscall entry/exit and needs to be equally restrictive so that the rules can be enforced with objtool. The objtool check for the noinstr.text correctness is not yet added to the build machinery and has to be invoked manually for now: objtool check -fal vmlinux.o The checking only works for builtin code as objtool cannot do a combined analysis of vmlinux.o and a module.o Thanks, tglx 8<---------- arch/x86/entry/Makefile | 2 arch/x86/entry/common.c | 173 ++++++++++++++++++++++++--------- arch/x86/entry/entry_32.S | 35 ++---- arch/x86/entry/entry_64.S | 16 +-- arch/x86/entry/entry_64_compat.S | 55 ++++------ arch/x86/entry/thunk_64.S | 45 +++++++- arch/x86/include/asm/hardirq.h | 4 arch/x86/include/asm/irqflags.h | 3 arch/x86/include/asm/kvm_host.h | 8 + arch/x86/include/asm/nospec-branch.h | 4 arch/x86/include/asm/paravirt.h | 3 arch/x86/kernel/ftrace_64.S | 2 arch/x86/kvm/svm/svm.c | 66 ++++++++++-- arch/x86/kvm/svm/vmenter.S | 2 arch/x86/kvm/vmx/ops.h | 4 arch/x86/kvm/vmx/vmenter.S | 5 arch/x86/kvm/vmx/vmx.c | 78 +++++++++++--- arch/x86/kvm/x86.c | 4 include/linux/context_tracking.h | 27 +++-- include/linux/context_tracking_state.h | 6 - kernel/context_tracking.c | 14 +- lib/smp_processor_id.c | 10 - 22 files changed, 391 insertions(+), 175 deletions(-)
