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 v3: - Unbreak i386 build, ingest seanjc's reviews from v2. Git branch: https://github.com/varadgautam/kvm-unit-tests/commits/ap-boot-v3/ v2: https://lore.kernel.org/kvm/20220412173407.13637-1-varad.gautam@xxxxxxxx/ Varad Gautam (11): x86: Share realmode trampoline between i386 and x86_64 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: Provide a stack within testcase memory x86: efi: Provide 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: Provide a common 64-bit AP entrypoint for EFI and non-EFI lib/alloc_page.h | 3 + lib/x86/apic.c | 2 - lib/x86/asm/setup.h | 3 + lib/x86/desc.c | 39 +++++++++-- lib/x86/desc.h | 3 + lib/x86/setup.c | 84 ++++++++++++++++++++---- lib/x86/smp.c | 132 +++++++++++++++++++++++++++++++++++++- lib/x86/smp.h | 10 +++ x86/cstart.S | 38 +---------- x86/cstart64.S | 120 +--------------------------------- x86/efi/crt0-efi-x86_64.S | 3 + x86/efi/efistart64.S | 81 ++++++++++++++--------- x86/start16.S | 27 ++++++++ x86/start32.S | 102 +++++++++++++++++++++++++++++ x86/svm_tests.c | 10 ++- 15 files changed, 443 insertions(+), 214 deletions(-) create mode 100644 x86/start16.S create mode 100644 x86/start32.S -- 2.32.0
