x86: provide read and write cr8 paravirt hooks (94ea03cd) · Commits · 戴 / test

include/asm-x86/paravirt.h

+2 −0

Original line number	Original line	Diff line number	Diff line
	@@ -619,6 +619,7 @@ static inline void write_cr4(unsigned long x)
	PVOP_VCALL1(pv_cpu_ops.write_cr4, x);		PVOP_VCALL1(pv_cpu_ops.write_cr4, x);
	}		}

			#ifdef CONFIG_X86_64
	static inline unsigned long read_cr8(void)		static inline unsigned long read_cr8(void)
	{		{
	return PVOP_CALL0(unsigned long, pv_cpu_ops.read_cr8);		return PVOP_CALL0(unsigned long, pv_cpu_ops.read_cr8);
	@@ -628,6 +629,7 @@ static inline void write_cr8(unsigned long x)
	{		{
	PVOP_VCALL1(pv_cpu_ops.write_cr8, x);		PVOP_VCALL1(pv_cpu_ops.write_cr8, x);
	}		}
			#endif

	static inline void raw_safe_halt(void)		static inline void raw_safe_halt(void)
	{		{

+16 −14

Original line number	Original line	Diff line number	Diff line
	@@ -231,6 +231,20 @@ static inline void native_write_cr4(unsigned long val)
	asm volatile("mov %0,%%cr4": :"r" (val), "m" (__force_order));		asm volatile("mov %0,%%cr4": :"r" (val), "m" (__force_order));
	}		}

			#ifdef CONFIG_X86_64
			static inline unsigned long native_read_cr8(void)
			{
			unsigned long cr8;
			asm volatile("movq %%cr8,%0" : "=r" (cr8));
			return cr8;
			}

			static inline void native_write_cr8(unsigned long val)
			{
			asm volatile("movq %0,%%cr8" :: "r" (val) : "memory");
			}
			#endif

	static inline void native_wbinvd(void)		static inline void native_wbinvd(void)
	{		{
	asm volatile("wbinvd": : :"memory");		asm volatile("wbinvd": : :"memory");
	@@ -248,21 +262,9 @@ static inline void native_wbinvd(void)
	#define read_cr4_safe() (native_read_cr4_safe())		#define read_cr4_safe() (native_read_cr4_safe())
	#define write_cr4(x) (native_write_cr4(x))		#define write_cr4(x) (native_write_cr4(x))
	#define wbinvd() (native_wbinvd())		#define wbinvd() (native_wbinvd())

	#ifdef CONFIG_X86_64		#ifdef CONFIG_X86_64
			#define read_cr8() (native_read_cr8())
	static inline unsigned long read_cr8(void)		#define write_cr8(x) (native_write_cr8(x))
	{
	unsigned long cr8;
	asm volatile("movq %%cr8,%0" : "=r" (cr8));
	return cr8;
	}

	static inline void write_cr8(unsigned long val)
	{
	asm volatile("movq %0,%%cr8" :: "r" (val) : "memory");
	}

	#endif		#endif

	/* Clear the 'TS' bit */		/* Clear the 'TS' bit */