Introduce the vSBI framework to handle extension ecall instruction calls from a guest.
In this patch series, support is added for only a few extensions and FIDs, just enough to boot the first guest domains and obtain logs from them. This keeps the patch series independent from other ongoing work. It was decided to start with support for the Legacy Extension, as it is still supported by Linux (so we may need it anyway), and because some of its FIDs require less functionality to implement at this stage compared to the more modern extensions. Oleksii Kurochko (3): xen/riscv: introduce vSBI extension framework xen/riscv: add RISC-V legacy SBI extension support for guests xen/riscv: add RISC-V virtual SBI base extension support for guests xen/arch/riscv/Makefile | 1 + xen/arch/riscv/include/asm/processor.h | 1 + xen/arch/riscv/include/asm/sbi.h | 14 +++++- xen/arch/riscv/include/asm/vsbi.h | 31 ++++++++++++ xen/arch/riscv/sbi.c | 8 ++-- xen/arch/riscv/traps.c | 8 ++++ xen/arch/riscv/vsbi/Makefile | 3 ++ xen/arch/riscv/vsbi/vsbi-base-extension.c | 52 +++++++++++++++++++++ xen/arch/riscv/vsbi/vsbi-legacy-extension.c | 37 +++++++++++++++ xen/arch/riscv/vsbi/vsbi.c | 46 ++++++++++++++++++ xen/arch/riscv/xen.lds.S | 7 +++ 11 files changed, 203 insertions(+), 5 deletions(-) create mode 100644 xen/arch/riscv/include/asm/vsbi.h create mode 100644 xen/arch/riscv/vsbi/Makefile create mode 100644 xen/arch/riscv/vsbi/vsbi-base-extension.c create mode 100644 xen/arch/riscv/vsbi/vsbi-legacy-extension.c create mode 100644 xen/arch/riscv/vsbi/vsbi.c -- 2.52.0
