When working on a way to move out the posix cpu timer expiry out of the timer interrupt context, I noticed that KVM is not handling pending task work before entering a guest. A quick hack was to add that to the x86 KVM handling loop. The discussion ended with a request to make this a generic infrastructure possible with also moving the per arch implementations of the enter from and return to user space handling generic. https://lore.kernel.org/r/89E42BCC-47A8-458B-B06A-D6A20D20512C@xxxxxxxxxxxxxx You asked for it, so don't complain that you have to review it :) The series implements the syscall enter/exit and the general exit to userspace work handling along with the pre guest enter functionality. The series converts x86 and ARM64. x86 is fully tested including selftests etc. ARM64 is only compile tested for now as my only ARM64 testbox is not available right now. Thanks, tglx --- /Makefile | 3 arch/Kconfig | 3 arch/arm64/Kconfig | 1 arch/arm64/include/asm/kvm_host.h | 1 arch/arm64/kernel/entry.S | 18 - arch/arm64/kernel/ptrace.c | 65 ------ arch/arm64/kernel/signal.c | 45 ---- arch/arm64/kernel/syscall.c | 49 ---- arch/x86/Kconfig | 1 arch/x86/entry/common.c | 265 +------------------------- arch/x86/entry/entry_32.S | 13 - arch/x86/entry/entry_64.S | 12 - arch/x86/entry/entry_64_compat.S | 21 -- arch/x86/include/asm/signal.h | 1 arch/x86/include/asm/thread_info.h | 9 arch/x86/kernel/signal.c | 2 arch/x86/kvm/x86.c | 17 - b/arch/arm64/include/asm/entry-common.h | 76 +++++++ b/arch/x86/include/asm/entry-common.h | 104 ++++++++++ b/include/linux/entry-common.h | 324 ++++++++++++++++++++++++++++++++ b/kernel/entry/common.c | 220 +++++++++++++++++++++ kernel/Makefile | 1 22 files changed, 776 insertions(+), 475 deletions(-)
