diff options
| author | Christoph Muellner <cmuellner@linux.com> | 2023-02-24 10:25:36 -0300 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2023-03-05 11:49:43 -0800 |
| commit | 59cb29d6a5149871d1acb18fb465879b1af5f3b2 (patch) | |
| tree | 48ac46a78ee73554285fe4a4676e04a3b309e19d | |
| parent | e05da09b7cfd8dd08c55e77ab2106634f7b06ad9 (diff) | |
| download | qemu-59cb29d6a5149871d1acb18fb465879b1af5f3b2.zip qemu-59cb29d6a5149871d1acb18fb465879b1af5f3b2.tar.gz qemu-59cb29d6a5149871d1acb18fb465879b1af5f3b2.tar.bz2 | |
target/riscv: add Zicbop cbo.prefetch{i, r, m} placeholder
The cmo.prefetch instructions are nops for QEMU (no emulation of the
memory hierarchy, no illegal instructions, no permission faults, no
traps).
Add a comment noting where they would be decoded in case cbo.prefetch
instructions become relevant in the future.
Co-developed-by: Philipp Tomsich <philipp.tomsich@vrull.eu>
Signed-off-by: Christoph Muellner <cmuellner@linux.com>
Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Weiwei Li <liweiwei@iscas.ac.cn>
Message-ID: <20230224132536.552293-5-dbarboza@ventanamicro.com>
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
| -rw-r--r-- | target/riscv/insn32.decode | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/target/riscv/insn32.decode b/target/riscv/insn32.decode index 282e41a..73d5d1b 100644 --- a/target/riscv/insn32.decode +++ b/target/riscv/insn32.decode @@ -134,6 +134,7 @@ addi ............ ..... 000 ..... 0010011 @i slti ............ ..... 010 ..... 0010011 @i sltiu ............ ..... 011 ..... 0010011 @i xori ............ ..... 100 ..... 0010011 @i +# cbo.prefetch_{i,r,m} instructions are ori with rd=x0 and not decoded. ori ............ ..... 110 ..... 0010011 @i andi ............ ..... 111 ..... 0010011 @i slli 00000. ...... ..... 001 ..... 0010011 @sh |