Kernel: Allow specifying ecx with CPUID

Some CPUID functions (e.g. 0xb) require input values in ecx.

1 files changed, 3 insertions, 3 deletions

diff --git a/Kernel/Arch/x86/CPUID.h b/Kernel/Arch/x86/CPUID.h
index af05ee4c58..324d204469 100644
--- a/Kernel/Arch/x86/CPUID.h
+++ b/Kernel/Arch/x86/CPUID.h
@@ -12,9 +12,9 @@ namespace Kernel {
 
 class CPUID {
 public:
-    explicit CPUID(u32 function) { asm volatile("cpuid"
-                                                : "=a"(m_eax), "=b"(m_ebx), "=c"(m_ecx), "=d"(m_edx)
-                                                : "a"(function), "c"(0)); }
+    explicit CPUID(u32 function, u32 ecx = 0) { asm volatile("cpuid"
+                                                             : "=a"(m_eax), "=b"(m_ebx), "=c"(m_ecx), "=d"(m_edx)
+                                                             : "a"(function), "c"(ecx)); }
     u32 eax() const { return m_eax; }
     u32 ebx() const { return m_ebx; }
     u32 ecx() const { return m_ecx; }