linux-kernel - [RFC RESEND 1/2] scripts: generate_rust

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Date:   Fri, 24 Feb 2023 13:50:43 +0000
From:   Conor Dooley <conor.dooley@...rochip.com>
To:     <linux-riscv@...ts.infradead.org>
CC:     Conor Dooley <conor.dooley@...rochip.com>, <conor@...nel.org>,
        "Miguel Ojeda" <ojeda@...nel.org>,
        Alex Gaynor <alex.gaynor@...il.com>,
        "Wedson Almeida Filho" <wedsonaf@...il.com>,
        Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>,
        Björn Roy Baron <bjorn3_gh@...tonmail.com>,
        Jonathan Corbet <corbet@....net>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        "Nathan Chancellor" <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Tom Rix <trix@...hat.com>, <rust-for-linux@...r.kernel.org>,
        <linux-doc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <llvm@...ts.linux.dev>
Subject: [RFC RESEND 1/2] scripts: generate_rust_target: enable building on RISC-V

From: Miguel Ojeda <ojeda@...nel.org>

Add the required bits from rust-for-linux to enable generating a RISC-V
target for rust.

Signed-off-by: Miguel Ojeda <ojeda@...nel.org>
Signed-off-by: Conor Dooley <conor.dooley@...rochip.com>
---
 scripts/generate_rust_target.rs | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/scripts/generate_rust_target.rs b/scripts/generate_rust_target.rs
index 3c6cbe2b278d..72428fc66502 100644
--- a/scripts/generate_rust_target.rs
+++ b/scripts/generate_rust_target.rs
@@ -161,6 +161,25 @@ fn main() {
         ts.push("features", features);
         ts.push("llvm-target", "x86_64-linux-gnu");
         ts.push("target-pointer-width", "64");
+    } else if cfg.has("RISCV") {
+        if cfg.has("64BIT") {
+            ts.push("arch", "riscv64");
+            ts.push("data-layout", "e-m:e-p:64:64-i64:64-i128:128-n64-S128");
+            ts.push("llvm-target", "riscv64-linux-gnu");
+            ts.push("target-pointer-width", "64");
+        } else {
+            ts.push("arch", "riscv32");
+            ts.push("data-layout", "e-m:e-p:32:32-i64:64-n32-S128");
+            ts.push("llvm-target", "riscv32-linux-gnu");
+            ts.push("target-pointer-width", "32");
+        }
+        ts.push("code-model", "medium");
+        ts.push("disable-redzone", true);
+        let mut features = "+m,+a".to_string();
+        if cfg.has("RISCV_ISA_C") {
+            features += ",+c";
+        }
+        ts.push("features", features);
     } else {
         panic!("Unsupported architecture");
     }
-- 
2.39.2