[llvm] [RISCV] Bump hwprobe support to Linux 6.11 (PR #108578)

[Pengcheng Wang via llvm-commits]

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@@ -2026,9 +2027,26 @@ const StringMap<bool> sys::getHostCPUFeatures() {
   Features["zicond"] = ExtMask & (1ULL << 35);  // RISCV_HWPROBE_EXT_ZICOND
   Features["zihintpause"] =
       ExtMask & (1ULL << 36); // RISCV_HWPROBE_EXT_ZIHINTPAUSE
-
-  // TODO: set unaligned-scalar-mem if RISCV_HWPROBE_KEY_MISALIGNED_PERF returns
-  // RISCV_HWPROBE_MISALIGNED_FAST.
+  Features["zve32x"] = ExtMask & (1ULL << 37); // RISCV_HWPROBE_EXT_ZVE32X
+  Features["zve32f"] = ExtMask & (1ULL << 38); // RISCV_HWPROBE_EXT_ZVE32F
+  Features["zve64x"] = ExtMask & (1ULL << 39); // RISCV_HWPROBE_EXT_ZVE64X
+  Features["zve64f"] = ExtMask & (1ULL << 40); // RISCV_HWPROBE_EXT_ZVE64F
+  Features["zve64d"] = ExtMask & (1ULL << 41); // RISCV_HWPROBE_EXT_ZVE64D
+  Features["zimop"] = ExtMask & (1ULL << 42);  // RISCV_HWPROBE_EXT_ZIMOP
+  Features["zca"] = ExtMask & (1ULL << 43);    // RISCV_HWPROBE_EXT_ZCA
+  Features["zcb"] = ExtMask & (1ULL << 44);    // RISCV_HWPROBE_EXT_ZCB
+  Features["zcd"] = ExtMask & (1ULL << 45);    // RISCV_HWPROBE_EXT_ZCD
+  Features["zcf"] = ExtMask & (1ULL << 46);    // RISCV_HWPROBE_EXT_ZCF
+  Features["zcmop"] = ExtMask & (1ULL << 47);  // RISCV_HWPROBE_EXT_ZCMOP
+  Features["zawrs"] = ExtMask & (1ULL << 48);  // RISCV_HWPROBE_EXT_ZAWRS
+
+  // Check whether the processor supports fast misaligned scalar memory access.
+  // NOTE: RISCV_HWPROBE_KEY_MISALIGNED_SCALAR_PERF is only available on
+  // Linux 6.11 or later. If it is not recognized, the key field will be cleared
+  // to -1.
+  if (Query[2].Key != -1 &&
+      Query[2].Value == /*RISCV_HWPROBE_MISALIGNED_SCALAR_FAST=*/3)
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wangpc-pp wrote:

No vector version?

https://github.com/llvm/llvm-project/pull/108578