Merge tag 'x86-urgent-2026-09-20' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 fixes from Ingo Molnar:

 - Reject the loading of a potentially problematic microcode version
   on Intel Granite Rapids systems (Chang S. Bae)

 - On FRED, reconstruct the proper #GP context for rejected INT
   instructions, to fix a signal ABI regression (Matthew Schwartz)

 - Add a test for this signal ABI regression the x86
   self-test suite (Matthew Schwartz)

 - Don't emit the new and not yet properly supported EGPR instructions
   (%r16-%r31) on CONFIG_X86_NATIVE_CPU=y builds (Chang S. Bae)

* tag 'x86-urgent-2026-09-20' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/build/64: Prevent native builds from generating EGPR use
  selftests/x86: Check signal state for rejected software interrupts
  x86/fred: Reconstruct the #GP context for rejected INT instructions
  x86/microcode/intel: Reject problematic loading on Granite Rapids systems

1 files changed, 5 insertions, 0 deletions

diff --git a/scripts/generate_rust_target.rs b/scripts/generate_rust_target.rs
index 3bf296581..7687b0dd5 100644
--- a/scripts/generate_rust_target.rs
+++ b/scripts/generate_rust_target.rs
@@ -224,6 +224,11 @@ fn main() {
             features += ",+harden-sls-ijmp";
             features += ",+harden-sls-ret";
         }
+        if cfg.has("X86_NATIVE_CPU") {
+            // Prevent the backend from generating APX instructions. The kernel is not yet prepared
+            // for general in-kernel EGPR use.
+            features += ",-apxf";
+        }
         ts.push("features", features);
         ts.push("llvm-target", "x86_64-linux-gnu");
         ts.push("supported-sanitizers", ["kcfi", "kernel-address"]);