linux

iv/linux

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RISC-V: Add bitmap reprensenting ISA features common across CPUs

This patch adds riscv_isa bitmap which represents Host ISA features
common across all Host CPUs. The riscv_isa is not same as elf_hwcap
because elf_hwcap will only have ISA features relevant for user-space
apps whereas riscv_isa will have ISA features relevant to both kernel
and user-space apps.

One of the use-case for riscv_isa bitmap is in KVM hypervisor where
we will use it to do following operations:

1. Check whether hypervisor extension is available
2. Find ISA features that need to be virtualized (e.g. floating
   point support, vector extension, etc.)

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Signed-off-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Alexander Graf <graf@amazon.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>

2020-05-04 14:08:59 -07:00

boot

RISC-V Patches for the 5.7 Merge Window, Part 1

2020-04-09 10:51:30 -07:00

configs

RISC-V Patches for the 5.7 Merge Window, Part 1

2020-04-09 10:51:30 -07:00

include

RISC-V: Add bitmap reprensenting ISA features common across CPUs

2020-05-04 14:08:59 -07:00

kernel

RISC-V: Add bitmap reprensenting ISA features common across CPUs