diff mbox series

[17/28] KVM: VMX: Move VMX instruction wrappers to a dedicated header file

Message ID 20181203215318.15545-18-sean.j.christopherson@intel.com
State New, archived
Headers show
Series KVM: VMX: Add "vmx" dir and shatter vmx.c | expand

Commit Message

Sean Christopherson Dec. 3, 2018, 9:53 p.m. UTC
VMX has a few hundred lines of code just to wrap various VMX specific
instructions, e.g. VMWREAD, INVVPID, etc...  Move them to a dedicated
header so it's easier to find/isolate the boilerplate.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
---
 arch/x86/kvm/vmx/ops.h | 285 +++++++++++++++++++++++++++++++++++++++++
 arch/x86/kvm/vmx/vmx.c | 273 +--------------------------------------
 2 files changed, 286 insertions(+), 272 deletions(-)
 create mode 100644 arch/x86/kvm/vmx/ops.h
diff mbox series

Patch

diff --git a/arch/x86/kvm/vmx/ops.h b/arch/x86/kvm/vmx/ops.h
new file mode 100644
index 000000000000..1568fa49b625
--- /dev/null
+++ b/arch/x86/kvm/vmx/ops.h
@@ -0,0 +1,285 @@ 
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __KVM_X86_VMX_INSN_H
+#define __KVM_X86_VMX_INSN_H
+
+#include <linux/nospec.h>
+
+#include <asm/kvm_host.h>
+#include <asm/vmx.h>
+
+#include "evmcs.h"
+#include "vmcs.h"
+
+#define __ex(x) __kvm_handle_fault_on_reboot(x)
+#define __ex_clear(x, reg) \
+	____kvm_handle_fault_on_reboot(x, "xor " reg ", " reg)
+
+static __always_inline void vmcs_check16(unsigned long field)
+{
+	BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6001) == 0x2000,
+			 "16-bit accessor invalid for 64-bit field");
+	BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6001) == 0x2001,
+			 "16-bit accessor invalid for 64-bit high field");
+	BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6000) == 0x4000,
+			 "16-bit accessor invalid for 32-bit high field");
+	BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6000) == 0x6000,
+			 "16-bit accessor invalid for natural width field");
+}
+
+static __always_inline void vmcs_check32(unsigned long field)
+{
+	BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6000) == 0,
+			 "32-bit accessor invalid for 16-bit field");
+	BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6000) == 0x6000,
+			 "32-bit accessor invalid for natural width field");
+}
+
+static __always_inline void vmcs_check64(unsigned long field)
+{
+	BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6000) == 0,
+			 "64-bit accessor invalid for 16-bit field");
+	BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6001) == 0x2001,
+			 "64-bit accessor invalid for 64-bit high field");
+	BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6000) == 0x4000,
+			 "64-bit accessor invalid for 32-bit field");
+	BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6000) == 0x6000,
+			 "64-bit accessor invalid for natural width field");
+}
+
+static __always_inline void vmcs_checkl(unsigned long field)
+{
+	BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6000) == 0,
+			 "Natural width accessor invalid for 16-bit field");
+	BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6001) == 0x2000,
+			 "Natural width accessor invalid for 64-bit field");
+	BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6001) == 0x2001,
+			 "Natural width accessor invalid for 64-bit high field");
+	BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6000) == 0x4000,
+			 "Natural width accessor invalid for 32-bit field");
+}
+
+static __always_inline unsigned long __vmcs_readl(unsigned long field)
+{
+	unsigned long value;
+
+	asm volatile (__ex_clear("vmread %1, %0", "%k0")
+		      : "=r"(value) : "r"(field));
+	return value;
+}
+
+static __always_inline u16 vmcs_read16(unsigned long field)
+{
+	vmcs_check16(field);
+	if (static_branch_unlikely(&enable_evmcs))
+		return evmcs_read16(field);
+	return __vmcs_readl(field);
+}
+
+static __always_inline u32 vmcs_read32(unsigned long field)
+{
+	vmcs_check32(field);
+	if (static_branch_unlikely(&enable_evmcs))
+		return evmcs_read32(field);
+	return __vmcs_readl(field);
+}
+
+static __always_inline u64 vmcs_read64(unsigned long field)
+{
+	vmcs_check64(field);
+	if (static_branch_unlikely(&enable_evmcs))
+		return evmcs_read64(field);
+#ifdef CONFIG_X86_64
+	return __vmcs_readl(field);
+#else
+	return __vmcs_readl(field) | ((u64)__vmcs_readl(field+1) << 32);
+#endif
+}
+
+static __always_inline unsigned long vmcs_readl(unsigned long field)
+{
+	vmcs_checkl(field);
+	if (static_branch_unlikely(&enable_evmcs))
+		return evmcs_read64(field);
+	return __vmcs_readl(field);
+}
+
+static noinline void vmwrite_error(unsigned long field, unsigned long value)
+{
+	printk(KERN_ERR "vmwrite error: reg %lx value %lx (err %d)\n",
+	       field, value, vmcs_read32(VM_INSTRUCTION_ERROR));
+	dump_stack();
+}
+
+static __always_inline void __vmcs_writel(unsigned long field, unsigned long value)
+{
+	bool error;
+
+	asm volatile (__ex("vmwrite %2, %1") CC_SET(na)
+		      : CC_OUT(na) (error) : "r"(field), "rm"(value));
+	if (unlikely(error))
+		vmwrite_error(field, value);
+}
+
+static __always_inline void vmcs_write16(unsigned long field, u16 value)
+{
+	vmcs_check16(field);
+	if (static_branch_unlikely(&enable_evmcs))
+		return evmcs_write16(field, value);
+
+	__vmcs_writel(field, value);
+}
+
+static __always_inline void vmcs_write32(unsigned long field, u32 value)
+{
+	vmcs_check32(field);
+	if (static_branch_unlikely(&enable_evmcs))
+		return evmcs_write32(field, value);
+
+	__vmcs_writel(field, value);
+}
+
+static __always_inline void vmcs_write64(unsigned long field, u64 value)
+{
+	vmcs_check64(field);
+	if (static_branch_unlikely(&enable_evmcs))
+		return evmcs_write64(field, value);
+
+	__vmcs_writel(field, value);
+#ifndef CONFIG_X86_64
+	asm volatile ("");
+	__vmcs_writel(field+1, value >> 32);
+#endif
+}
+
+static __always_inline void vmcs_writel(unsigned long field, unsigned long value)
+{
+	vmcs_checkl(field);
+	if (static_branch_unlikely(&enable_evmcs))
+		return evmcs_write64(field, value);
+
+	__vmcs_writel(field, value);
+}
+
+static __always_inline void vmcs_clear_bits(unsigned long field, u32 mask)
+{
+	BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6000) == 0x2000,
+			 "vmcs_clear_bits does not support 64-bit fields");
+	if (static_branch_unlikely(&enable_evmcs))
+		return evmcs_write32(field, evmcs_read32(field) & ~mask);
+
+	__vmcs_writel(field, __vmcs_readl(field) & ~mask);
+}
+
+static __always_inline void vmcs_set_bits(unsigned long field, u32 mask)
+{
+	BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6000) == 0x2000,
+			 "vmcs_set_bits does not support 64-bit fields");
+	if (static_branch_unlikely(&enable_evmcs))
+		return evmcs_write32(field, evmcs_read32(field) | mask);
+
+	__vmcs_writel(field, __vmcs_readl(field) | mask);
+}
+
+static void vmcs_clear(struct vmcs *vmcs)
+{
+	u64 phys_addr = __pa(vmcs);
+	bool error;
+
+	asm volatile (__ex("vmclear %1") CC_SET(na)
+		      : CC_OUT(na) (error) : "m"(phys_addr));
+	if (unlikely(error))
+		printk(KERN_ERR "kvm: vmclear fail: %p/%llx\n",
+		       vmcs, phys_addr);
+}
+
+static void vmcs_load(struct vmcs *vmcs)
+{
+	u64 phys_addr = __pa(vmcs);
+	bool error;
+
+	if (static_branch_unlikely(&enable_evmcs))
+		return evmcs_load(phys_addr);
+
+	asm volatile (__ex("vmptrld %1") CC_SET(na)
+		      : CC_OUT(na) (error) : "m"(phys_addr));
+	if (unlikely(error))
+		printk(KERN_ERR "kvm: vmptrld %p/%llx failed\n",
+		       vmcs, phys_addr);
+}
+
+static inline void __invvpid(unsigned long ext, u16 vpid, gva_t gva)
+{
+	struct {
+		u64 vpid : 16;
+		u64 rsvd : 48;
+		u64 gva;
+	} operand = { vpid, 0, gva };
+	bool error;
+
+	asm volatile (__ex("invvpid %2, %1") CC_SET(na)
+		      : CC_OUT(na) (error) : "r"(ext), "m"(operand));
+	BUG_ON(error);
+}
+
+static inline void __invept(unsigned long ext, u64 eptp, gpa_t gpa)
+{
+	struct {
+		u64 eptp, gpa;
+	} operand = {eptp, gpa};
+	bool error;
+
+	asm volatile (__ex("invept %2, %1") CC_SET(na)
+		      : CC_OUT(na) (error) : "r"(ext), "m"(operand));
+	BUG_ON(error);
+}
+
+static inline bool vpid_sync_vcpu_addr(int vpid, gva_t addr)
+{
+	if (vpid == 0)
+		return true;
+
+	if (cpu_has_vmx_invvpid_individual_addr()) {
+		__invvpid(VMX_VPID_EXTENT_INDIVIDUAL_ADDR, vpid, addr);
+		return true;
+	}
+
+	return false;
+}
+
+static inline void vpid_sync_vcpu_single(int vpid)
+{
+	if (vpid == 0)
+		return;
+
+	if (cpu_has_vmx_invvpid_single())
+		__invvpid(VMX_VPID_EXTENT_SINGLE_CONTEXT, vpid, 0);
+}
+
+static inline void vpid_sync_vcpu_global(void)
+{
+	if (cpu_has_vmx_invvpid_global())
+		__invvpid(VMX_VPID_EXTENT_ALL_CONTEXT, 0, 0);
+}
+
+static inline void vpid_sync_context(int vpid)
+{
+	if (cpu_has_vmx_invvpid_single())
+		vpid_sync_vcpu_single(vpid);
+	else
+		vpid_sync_vcpu_global();
+}
+
+static inline void ept_sync_global(void)
+{
+	__invept(VMX_EPT_EXTENT_GLOBAL, 0, 0);
+}
+
+static inline void ept_sync_context(u64 eptp)
+{
+	if (cpu_has_vmx_invept_context())
+		__invept(VMX_EPT_EXTENT_CONTEXT, eptp, 0);
+	else
+		ept_sync_global();
+}
+
+#endif /* __KVM_X86_VMX_INSN_H */
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 4096c7ddd6ae..a4885bc40064 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -55,16 +55,13 @@ 
 #include "kvm_cache_regs.h"
 #include "lapic.h"
 #include "mmu.h"
+#include "ops.h"
 #include "pmu.h"
 #include "trace.h"
 #include "vmcs.h"
 #include "vmcs12.h"
 #include "x86.h"
 
-#define __ex(x) __kvm_handle_fault_on_reboot(x)
-#define __ex_clear(x, reg) \
-	____kvm_handle_fault_on_reboot(x, "xor " reg ", " reg)
-
 MODULE_AUTHOR("Qumranet");
 MODULE_LICENSE("GPL");
 
@@ -1044,32 +1041,6 @@  static int __find_msr_index(struct vcpu_vmx *vmx, u32 msr)
 	return -1;
 }
 
-static inline void __invvpid(unsigned long ext, u16 vpid, gva_t gva)
-{
-    struct {
-	u64 vpid : 16;
-	u64 rsvd : 48;
-	u64 gva;
-    } operand = { vpid, 0, gva };
-    bool error;
-
-    asm volatile (__ex("invvpid %2, %1") CC_SET(na)
-		  : CC_OUT(na) (error) : "r"(ext), "m"(operand));
-    BUG_ON(error);
-}
-
-static inline void __invept(unsigned long ext, u64 eptp, gpa_t gpa)
-{
-	struct {
-		u64 eptp, gpa;
-	} operand = {eptp, gpa};
-	bool error;
-
-	asm volatile (__ex("invept %2, %1") CC_SET(na)
-		      : CC_OUT(na) (error) : "r"(ext), "m"(operand));
-	BUG_ON(error);
-}
-
 static struct shared_msr_entry *find_msr_entry(struct vcpu_vmx *vmx, u32 msr)
 {
 	int i;
@@ -1080,18 +1051,6 @@  static struct shared_msr_entry *find_msr_entry(struct vcpu_vmx *vmx, u32 msr)
 	return NULL;
 }
 
-static void vmcs_clear(struct vmcs *vmcs)
-{
-	u64 phys_addr = __pa(vmcs);
-	bool error;
-
-	asm volatile (__ex("vmclear %1") CC_SET(na)
-		      : CC_OUT(na) (error) : "m"(phys_addr));
-	if (unlikely(error))
-		printk(KERN_ERR "kvm: vmclear fail: %p/%llx\n",
-		       vmcs, phys_addr);
-}
-
 static inline void loaded_vmcs_init(struct loaded_vmcs *loaded_vmcs)
 {
 	vmcs_clear(loaded_vmcs->vmcs);
@@ -1101,21 +1060,6 @@  static inline void loaded_vmcs_init(struct loaded_vmcs *loaded_vmcs)
 	loaded_vmcs->launched = 0;
 }
 
-static void vmcs_load(struct vmcs *vmcs)
-{
-	u64 phys_addr = __pa(vmcs);
-	bool error;
-
-	if (static_branch_unlikely(&enable_evmcs))
-		return evmcs_load(phys_addr);
-
-	asm volatile (__ex("vmptrld %1") CC_SET(na)
-		      : CC_OUT(na) (error) : "m"(phys_addr));
-	if (unlikely(error))
-		printk(KERN_ERR "kvm: vmptrld %p/%llx failed\n",
-		       vmcs, phys_addr);
-}
-
 #ifdef CONFIG_KEXEC_CORE
 /*
  * This bitmap is used to indicate whether the vmclear
@@ -1189,221 +1133,6 @@  static void loaded_vmcs_clear(struct loaded_vmcs *loaded_vmcs)
 			 __loaded_vmcs_clear, loaded_vmcs, 1);
 }
 
-static inline bool vpid_sync_vcpu_addr(int vpid, gva_t addr)
-{
-	if (vpid == 0)
-		return true;
-
-	if (cpu_has_vmx_invvpid_individual_addr()) {
-		__invvpid(VMX_VPID_EXTENT_INDIVIDUAL_ADDR, vpid, addr);
-		return true;
-	}
-
-	return false;
-}
-
-static inline void vpid_sync_vcpu_single(int vpid)
-{
-	if (vpid == 0)
-		return;
-
-	if (cpu_has_vmx_invvpid_single())
-		__invvpid(VMX_VPID_EXTENT_SINGLE_CONTEXT, vpid, 0);
-}
-
-static inline void vpid_sync_vcpu_global(void)
-{
-	if (cpu_has_vmx_invvpid_global())
-		__invvpid(VMX_VPID_EXTENT_ALL_CONTEXT, 0, 0);
-}
-
-static inline void vpid_sync_context(int vpid)
-{
-	if (cpu_has_vmx_invvpid_single())
-		vpid_sync_vcpu_single(vpid);
-	else
-		vpid_sync_vcpu_global();
-}
-
-static inline void ept_sync_global(void)
-{
-	__invept(VMX_EPT_EXTENT_GLOBAL, 0, 0);
-}
-
-static inline void ept_sync_context(u64 eptp)
-{
-	if (cpu_has_vmx_invept_context())
-		__invept(VMX_EPT_EXTENT_CONTEXT, eptp, 0);
-	else
-		ept_sync_global();
-}
-
-static __always_inline void vmcs_check16(unsigned long field)
-{
-        BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6001) == 0x2000,
-			 "16-bit accessor invalid for 64-bit field");
-        BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6001) == 0x2001,
-			 "16-bit accessor invalid for 64-bit high field");
-        BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6000) == 0x4000,
-			 "16-bit accessor invalid for 32-bit high field");
-        BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6000) == 0x6000,
-			 "16-bit accessor invalid for natural width field");
-}
-
-static __always_inline void vmcs_check32(unsigned long field)
-{
-        BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6000) == 0,
-			 "32-bit accessor invalid for 16-bit field");
-        BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6000) == 0x6000,
-			 "32-bit accessor invalid for natural width field");
-}
-
-static __always_inline void vmcs_check64(unsigned long field)
-{
-        BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6000) == 0,
-			 "64-bit accessor invalid for 16-bit field");
-        BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6001) == 0x2001,
-			 "64-bit accessor invalid for 64-bit high field");
-        BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6000) == 0x4000,
-			 "64-bit accessor invalid for 32-bit field");
-        BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6000) == 0x6000,
-			 "64-bit accessor invalid for natural width field");
-}
-
-static __always_inline void vmcs_checkl(unsigned long field)
-{
-        BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6000) == 0,
-			 "Natural width accessor invalid for 16-bit field");
-        BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6001) == 0x2000,
-			 "Natural width accessor invalid for 64-bit field");
-        BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6001) == 0x2001,
-			 "Natural width accessor invalid for 64-bit high field");
-        BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6000) == 0x4000,
-			 "Natural width accessor invalid for 32-bit field");
-}
-
-static __always_inline unsigned long __vmcs_readl(unsigned long field)
-{
-	unsigned long value;
-
-	asm volatile (__ex_clear("vmread %1, %0", "%k0")
-		      : "=r"(value) : "r"(field));
-	return value;
-}
-
-static __always_inline u16 vmcs_read16(unsigned long field)
-{
-	vmcs_check16(field);
-	if (static_branch_unlikely(&enable_evmcs))
-		return evmcs_read16(field);
-	return __vmcs_readl(field);
-}
-
-static __always_inline u32 vmcs_read32(unsigned long field)
-{
-	vmcs_check32(field);
-	if (static_branch_unlikely(&enable_evmcs))
-		return evmcs_read32(field);
-	return __vmcs_readl(field);
-}
-
-static __always_inline u64 vmcs_read64(unsigned long field)
-{
-	vmcs_check64(field);
-	if (static_branch_unlikely(&enable_evmcs))
-		return evmcs_read64(field);
-#ifdef CONFIG_X86_64
-	return __vmcs_readl(field);
-#else
-	return __vmcs_readl(field) | ((u64)__vmcs_readl(field+1) << 32);
-#endif
-}
-
-static __always_inline unsigned long vmcs_readl(unsigned long field)
-{
-	vmcs_checkl(field);
-	if (static_branch_unlikely(&enable_evmcs))
-		return evmcs_read64(field);
-	return __vmcs_readl(field);
-}
-
-static noinline void vmwrite_error(unsigned long field, unsigned long value)
-{
-	printk(KERN_ERR "vmwrite error: reg %lx value %lx (err %d)\n",
-	       field, value, vmcs_read32(VM_INSTRUCTION_ERROR));
-	dump_stack();
-}
-
-static __always_inline void __vmcs_writel(unsigned long field, unsigned long value)
-{
-	bool error;
-
-	asm volatile (__ex("vmwrite %2, %1") CC_SET(na)
-		      : CC_OUT(na) (error) : "r"(field), "rm"(value));
-	if (unlikely(error))
-		vmwrite_error(field, value);
-}
-
-static __always_inline void vmcs_write16(unsigned long field, u16 value)
-{
-	vmcs_check16(field);
-	if (static_branch_unlikely(&enable_evmcs))
-		return evmcs_write16(field, value);
-
-	__vmcs_writel(field, value);
-}
-
-static __always_inline void vmcs_write32(unsigned long field, u32 value)
-{
-	vmcs_check32(field);
-	if (static_branch_unlikely(&enable_evmcs))
-		return evmcs_write32(field, value);
-
-	__vmcs_writel(field, value);
-}
-
-static __always_inline void vmcs_write64(unsigned long field, u64 value)
-{
-	vmcs_check64(field);
-	if (static_branch_unlikely(&enable_evmcs))
-		return evmcs_write64(field, value);
-
-	__vmcs_writel(field, value);
-#ifndef CONFIG_X86_64
-	asm volatile ("");
-	__vmcs_writel(field+1, value >> 32);
-#endif
-}
-
-static __always_inline void vmcs_writel(unsigned long field, unsigned long value)
-{
-	vmcs_checkl(field);
-	if (static_branch_unlikely(&enable_evmcs))
-		return evmcs_write64(field, value);
-
-	__vmcs_writel(field, value);
-}
-
-static __always_inline void vmcs_clear_bits(unsigned long field, u32 mask)
-{
-        BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6000) == 0x2000,
-			 "vmcs_clear_bits does not support 64-bit fields");
-	if (static_branch_unlikely(&enable_evmcs))
-		return evmcs_write32(field, evmcs_read32(field) & ~mask);
-
-	__vmcs_writel(field, __vmcs_readl(field) & ~mask);
-}
-
-static __always_inline void vmcs_set_bits(unsigned long field, u32 mask)
-{
-        BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6000) == 0x2000,
-			 "vmcs_set_bits does not support 64-bit fields");
-	if (static_branch_unlikely(&enable_evmcs))
-		return evmcs_write32(field, evmcs_read32(field) | mask);
-
-	__vmcs_writel(field, __vmcs_readl(field) | mask);
-}
-
 static inline void vm_entry_controls_reset_shadow(struct vcpu_vmx *vmx)
 {
 	vmx->vm_entry_controls_shadow = vmcs_read32(VM_ENTRY_CONTROLS);