MSR mod for Windows

cmake/randomx.cmake

@@ -79,7 +79,9 @@ if (WITH_RANDOMX)
             )
     endif()
 
-    if (XMRIG_OS_LINUX AND NOT XMRIG_ARM)
+    if (WIN32)
+        list(APPEND SOURCES_CRYPTO src/crypto/rx/Rx_windows.cpp)
+    elseif (XMRIG_OS_LINUX AND NOT XMRIG_ARM)
         list(APPEND SOURCES_CRYPTO src/crypto/rx/Rx_linux.cpp)
     endif()
 else()

src/crypto/rx/Rx.cpp

@@ -115,7 +115,7 @@ void xmrig::Rx::init(IRxListener *listener)
 }
 
 
-#if !defined(XMRIG_OS_LINUX) || defined(XMRIG_ARM)
+#if (!defined(XMRIG_OS_LINUX) && !defined(_WIN32)) || defined(XMRIG_ARM)
 void xmrig::Rx::osInit(const RxConfig &)
 {
 }

src/crypto/rx/Rx_windows.cpp

@@ -0,0 +1,216 @@
+/* XMRig
+ * Copyright 2010      Jeff Garzik              <jgarzik@pobox.com>
+ * Copyright 2012-2014 pooler                   <pooler@litecoinpool.org>
+ * Copyright 2014      Lucas Jones              <https://github.com/lucasjones>
+ * Copyright 2014-2016 Wolf9466                 <https://github.com/OhGodAPet>
+ * Copyright 2016      Jay D Dee                <jayddee246@gmail.com>
+ * Copyright 2017-2019 XMR-Stak                 <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
+ * Copyright 2018      Lee Clagett              <https://github.com/vtnerd>
+ * Copyright 2018-2019 tevador                  <tevador@gmail.com>
+ * Copyright 2018-2019 SChernykh                <https://github.com/SChernykh>
+ * Copyright 2000      Transmeta Corporation    <https://github.com/intel/msr-tools>
+ * Copyright 2004-2008 H. Peter Anvin           <https://github.com/intel/msr-tools>
+ * Copyright 2016-2019 XMRig                    <https://github.com/xmrig>, <support@xmrig.com>
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#include "crypto/rx/Rx.h"
+#include "backend/common/Tags.h"
+#include "backend/cpu/Cpu.h"
+#include "base/io/log/Log.h"
+#include "base/kernel/Platform.h"
+#include "crypto/rx/RxConfig.h"
+
+#include <Windows.h>
+#include <string>
+#include <thread>
+
+#define SERVICE_NAME L"WinRing0_1_2_0"
+
+static SC_HANDLE hManager;
+static SC_HANDLE hService;
+
+static bool uninstall_driver()
+{
+    bool result = true;
+    DWORD err;
+    SERVICE_STATUS serviceStatus;
+    if (!ControlService(hService, SERVICE_CONTROL_STOP, &serviceStatus)) {
+        err = GetLastError();
+        LOG_ERR("Failed to stop WinRing0 driver, error %u", err);
+        result = false;
+    }
+    if (!DeleteService(hService)) {
+        err = GetLastError();
+        LOG_ERR("Failed to remove WinRing0 driver, error %u", err);
+        result = false;
+    }
+    return result;
+}
+
+static HANDLE install_driver()
+{
+    DWORD err = 0;
+
+    hManager = OpenSCManager(nullptr, nullptr, SC_MANAGER_ALL_ACCESS);
+    if (!hManager) {
+        err = GetLastError();
+        LOG_ERR("Failed to open service control manager, error %u", err);
+        return 0;
+    }
+
+    std::vector<wchar_t> dir;
+    dir.resize(MAX_PATH);
+    do {
+        dir.resize(dir.size() * 2);
+        DWORD len = GetModuleFileNameW(NULL, dir.data(), dir.size());
+        err = GetLastError();
+    } while (err == ERROR_INSUFFICIENT_BUFFER);
+
+    if (err != ERROR_SUCCESS) {
+        LOG_ERR("Failed to get path to driver, error %u", err);
+        return 0;
+    }
+
+    for (auto it = dir.end(); it != dir.begin(); --it) {
+        if ((*it == L'\\') || (*it == L'/')) {
+            ++it;
+            *it = L'\0';
+            break;
+        }
+    }
+
+    std::wstring driverPath = dir.data();
+    driverPath += L"WinRing0x64.sys";
+
+    hService = OpenServiceW(hManager, SERVICE_NAME, SERVICE_ALL_ACCESS);
+    if (hService) {
+        if (!uninstall_driver()) {
+            return 0;
+        }
+        CloseServiceHandle(hService);
+        hService = 0;
+    }
+    else {
+        err = GetLastError();
+        if (err != ERROR_SERVICE_DOES_NOT_EXIST) {
+            LOG_ERR("Failed to open WinRing0 driver, error %u", err);
+            return 0;
+        }
+    }
+
+    hService = CreateServiceW(hManager, SERVICE_NAME, SERVICE_NAME, SERVICE_ALL_ACCESS, SERVICE_KERNEL_DRIVER, SERVICE_DEMAND_START, SERVICE_ERROR_NORMAL, driverPath.c_str(), nullptr, nullptr, nullptr, nullptr, nullptr);
+    if (!hService) {
+        LOG_ERR("Failed to install WinRing0 driver, error %u", err);
+    }
+
+    if (!StartService(hService, 0, nullptr)) {
+        err = GetLastError();
+        if (err != ERROR_SERVICE_ALREADY_RUNNING) {
+            LOG_ERR("Failed to start WinRing0 driver, error %u", err);
+            return 0;
+        }
+    }
+
+    HANDLE hDriver = CreateFileW(L"\\\\.\\" SERVICE_NAME, GENERIC_READ | GENERIC_WRITE, 0, nullptr, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, nullptr);
+    if (!hDriver) {
+        err = GetLastError();
+        LOG_ERR("Failed to connect to WinRing0 driver, error %u", err);
+        return 0;
+    }
+
+    return hDriver;
+}
+
+
+#define IOCTL_WRITE_MSR CTL_CODE(40000, 0x822, METHOD_BUFFERED, FILE_ANY_ACCESS)
+
+static bool wrmsr(HANDLE hDriver, uint32_t reg, uint64_t value) {
+    struct {
+        uint32_t reg;
+        uint32_t value[2];
+    } input;
+    static_assert(sizeof(input) == 12, "Invalid struct size for WinRing0 driver");
+
+    input.reg = reg;
+    *((uint64_t*)input.value) = value;
+
+    DWORD output;
+    DWORD k;
+    if (!DeviceIoControl(hDriver, IOCTL_WRITE_MSR, &input, sizeof(input), &output, sizeof(output), &k, nullptr)) {
+        const DWORD err = GetLastError();
+        LOG_WARN(CLEAR "%s" YELLOW_BOLD_S "cannot set MSR 0x%08" PRIx32 " to 0x%08" PRIx64, xmrig::rx_tag(), reg, value);
+        return false;
+    }
+
+    return true;
+}
+
+
+void xmrig::Rx::osInit(const RxConfig &config)
+{
+    if ((config.wrmsr() < 0) || !ICpuInfo::isX64()) {
+        return;
+    }
+
+    const char* msr_mod_variant = (Cpu::info()->assembly() == Assembly::RYZEN) ? "Ryzen" :
+                                 ((Cpu::info()->vendor() == ICpuInfo::VENDOR_INTEL) ? "Intel" : nullptr);
+
+    if (!msr_mod_variant) {
+        return;
+    }
+
+    LOG_INFO(CLEAR "%s" GREEN_BOLD_S "MSR mod: loading WinRing0 driver", xmrig::rx_tag());
+
+    HANDLE hDriver = install_driver();
+    if (!hDriver) {
+        if (hService) {
+            uninstall_driver();
+            CloseServiceHandle(hService);
+        }
+        if (hManager) {
+            CloseServiceHandle(hManager);
+        }
+        return;
+    }
+
+    LOG_INFO(CLEAR "%s" GREEN_BOLD_S "MSR mod: setting MSR register values for %s", xmrig::rx_tag(), msr_mod_variant);
+
+    std::thread wrmsr_thread([hDriver, &config]() {
+        for (uint32_t i = 0, n = std::thread::hardware_concurrency(); i < n; ++i) {
+            Platform::setThreadAffinity(i);
+            if (Cpu::info()->assembly() == Assembly::RYZEN) {
+                wrmsr(hDriver, 0xC0011020, 0);
+                wrmsr(hDriver, 0xC0011021, 0x40);
+                wrmsr(hDriver, 0xC0011022, 0x510000);
+                wrmsr(hDriver, 0xC001102b, 0x1808cc16);
+            }
+            else if (Cpu::info()->vendor() == ICpuInfo::VENDOR_INTEL) {
+                wrmsr(hDriver, 0x1a4, config.wrmsr());
+            }
+        }
+    });
+    wrmsr_thread.join();
+
+    CloseHandle(hDriver);
+
+    uninstall_driver();
+
+    CloseServiceHandle(hService);
+    CloseServiceHandle(hManager);
+
+    LOG_INFO(CLEAR "%s" GREEN_BOLD_S "MSR mod: all done, WinRing0 driver unloaded", xmrig::rx_tag());
+}