This series brings multi-vcpu support to UEFI tests on x86. Most of the necessary AP bringup code already exists within kvm-unit-tests' cstart64.S, and has now been either rewritten in C or moved to a common location to be shared between EFI and non-EFI test builds. A call gate is used to transition from 16-bit to 32-bit mode, since EFI may not load the 32-bit entrypoint low enough to be reachable from the SIPI vector. Changes in v2: - rebase onto kvm-unit-tests@1a4529ce83 + seanjc's percpu apic_ops series [1]. - split some commits for readability. The series has been tested with this patch [2] which fixes EFI pagetable setup. Git branch: https://github.com/varadgautam/kvm-unit-tests/commits/ap-boot-v2/ [1] https://lore.kernel.org/all/20220121231852.1439917-1-seanjc@xxxxxxxxxx/ [2] https://lore.kernel.org/kvm/20220406123312.12986-1-varad.gautam@xxxxxxxx/ v1: https://lore.kernel.org/all/20220408103127.19219-1-varad.gautam@xxxxxxxx/ Varad Gautam (10): x86: Move ap_init() to smp.c x86: Move load_idt() to desc.c x86: desc: Split IDT entry setup into a generic helper x86: Move load_gdt_tss() to desc.c x86: efi: Stop using UEFI-provided stack x86: efi: Stop using UEFI-provided %gs for percpu storage x86: efi, smp: Transition APs from 16-bit to 32-bit mode x86: Move 32-bit bringup routines to start32.S x86: efi, smp: Transition APs from 32-bit to 64-bit mode x86: Move ap_start64 and save_id to setup.c lib/x86/asm/setup.h | 3 ++ lib/x86/desc.c | 39 +++++++++++--- lib/x86/desc.h | 3 ++ lib/x86/setup.c | 59 ++++++++++++++++----- lib/x86/smp.c | 88 +++++++++++++++++++++++++++++++- lib/x86/smp.h | 1 + x86/cstart64.S | 105 ++------------------------------------ x86/efi/crt0-efi-x86_64.S | 3 ++ x86/efi/efistart64.S | 69 ++++++++++++++++++++----- x86/start32.S | 102 ++++++++++++++++++++++++++++++++++++ 10 files changed, 336 insertions(+), 136 deletions(-) create mode 100644 x86/start32.S -- 2.32.0
