[clang] [amdgpu-arch] Replace use of HSA with reading sysfs directly (PR #116651)

[Matt Arsenault via cfe-commits]

================
@@ -1,122 +0,0 @@
-//===- AMDGPUArchByHSA.cpp - list AMDGPU installed ------*- C++ -*---------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-//
-// This file implements a tool for detecting name of AMDGPU installed in system
-// using HSA on Linux. This tool is used by AMDGPU OpenMP and HIP driver.
-//
-//===----------------------------------------------------------------------===//
-
-#include "clang/Basic/Version.h"
-#include "llvm/Support/CommandLine.h"
-#include "llvm/Support/DynamicLibrary.h"
-#include "llvm/Support/Error.h"
-#include "llvm/Support/raw_ostream.h"
-#include <memory>
-#include <string>
-#include <vector>
-
-using namespace llvm;
-
-typedef enum {
-  HSA_STATUS_SUCCESS = 0x0,
-} hsa_status_t;
-
-typedef enum {
-  HSA_DEVICE_TYPE_CPU = 0,
-  HSA_DEVICE_TYPE_GPU = 1,
-} hsa_device_type_t;
-
-typedef enum {
-  HSA_AGENT_INFO_NAME = 0,
-  HSA_AGENT_INFO_DEVICE = 17,
-} hsa_agent_info_t;
-
-typedef struct hsa_agent_s {
-  uint64_t handle;
-} hsa_agent_t;
-
-hsa_status_t (*hsa_init)();
-hsa_status_t (*hsa_shut_down)();
-hsa_status_t (*hsa_agent_get_info)(hsa_agent_t, hsa_agent_info_t, void *);
-hsa_status_t (*hsa_iterate_agents)(hsa_status_t (*)(hsa_agent_t, void *),
-                                   void *);
-
-constexpr const char *DynamicHSAPath = "libhsa-runtime64.so";
-
-llvm::Error loadHSA() {
-  std::string ErrMsg;
-  auto DynlibHandle = std::make_unique<llvm::sys::DynamicLibrary>(
-      llvm::sys::DynamicLibrary::getPermanentLibrary(DynamicHSAPath, &ErrMsg));
-  if (!DynlibHandle->isValid()) {
-    return llvm::createStringError(llvm::inconvertibleErrorCode(),
-                                   "Failed to 'dlopen' %s", DynamicHSAPath);
-  }
-#define DYNAMIC_INIT(SYMBOL)                                                   \
-  {                                                                            \
-    void *SymbolPtr = DynlibHandle->getAddressOfSymbol(#SYMBOL);               \
-    if (!SymbolPtr)                                                            \
-      return llvm::createStringError(llvm::inconvertibleErrorCode(),           \
-                                     "Failed to 'dlsym' " #SYMBOL);            \
-    SYMBOL = reinterpret_cast<decltype(SYMBOL)>(SymbolPtr);                    \
-  }
-  DYNAMIC_INIT(hsa_init);
-  DYNAMIC_INIT(hsa_shut_down);
-  DYNAMIC_INIT(hsa_agent_get_info);
-  DYNAMIC_INIT(hsa_iterate_agents);
-#undef DYNAMIC_INIT
-  return llvm::Error::success();
-}
-
-static hsa_status_t iterateAgentsCallback(hsa_agent_t Agent, void *Data) {
-  hsa_device_type_t DeviceType;
-  hsa_status_t Status =
-      hsa_agent_get_info(Agent, HSA_AGENT_INFO_DEVICE, &DeviceType);
-
-  // continue only if device type if GPU
-  if (Status != HSA_STATUS_SUCCESS || DeviceType != HSA_DEVICE_TYPE_GPU) {
-    return Status;
-  }
-
-  std::vector<std::string> *GPUs =
-      static_cast<std::vector<std::string> *>(Data);
-  char GPUName[64];
-  Status = hsa_agent_get_info(Agent, HSA_AGENT_INFO_NAME, GPUName);
-  if (Status != HSA_STATUS_SUCCESS) {
-    return Status;
-  }
-  GPUs->push_back(GPUName);
-  return HSA_STATUS_SUCCESS;
-}
-
-int printGPUsByHSA() {
-  // Attempt to load the HSA runtime.
-  if (llvm::Error Err = loadHSA()) {
-    logAllUnhandledErrors(std::move(Err), llvm::errs());
-    return 1;
-  }
-
-  hsa_status_t Status = hsa_init();
-  if (Status != HSA_STATUS_SUCCESS) {
-    return 1;
-  }
-
-  std::vector<std::string> GPUs;
-  Status = hsa_iterate_agents(iterateAgentsCallback, &GPUs);
----------------
arsenm wrote:

Can you link the reference code that reports these in the hsa libraries? 

https://github.com/llvm/llvm-project/pull/116651