Add pkvm msr ops, avoid using Linux msr ops directly to remove the
dependency of link to EXTABLE.
Signed-off-by: Jason Chen CJ <jason.cj.chen@xxxxxxxxx>
---
arch/x86/kvm/vmx/pkvm/hyp/cpu.h | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/arch/x86/kvm/vmx/pkvm/hyp/cpu.h b/arch/x86/kvm/vmx/pkvm/hyp/cpu.h
index c49074292f7c..896c2984ffa6 100644
--- a/arch/x86/kvm/vmx/pkvm/hyp/cpu.h
+++ b/arch/x86/kvm/vmx/pkvm/hyp/cpu.h
@@ -13,6 +13,29 @@ static inline u64 pkvm_msr_read(u32 reg)
return (((u64)msrh << 32U) | msrl);
}
+#define pkvm_rdmsr(msr, low, high) \
+do { \
+ u64 __val = pkvm_msr_read(msr); \
+ (void)((low) = (u32)__val); \
+ (void)((high) = (u32)(__val >> 32)); \
+} while (0)
+
+#define pkvm_rdmsrl(msr, val) \
+ ((val) = pkvm_msr_read((msr)))
+
+static inline void pkvm_msr_write(u32 reg, u64 msr_val)
+{
+ asm volatile (" wrmsr " : : "c" (reg), "a" ((u32)msr_val), "d" ((u32)(msr_val >> 32U)));
+}
+
+#define pkvm_wrmsr(msr, low, high) \
+do { \
+ u64 __val = (u64)(high) << 32 | (u64)(low); \
+ pkvm_msr_write(msr, __val); \
+} while (0)
+
+#define pkvm_wrmsrl(msr, val) pkvm_msr_write(msr, val)
+
#ifdef CONFIG_PKVM_INTEL_DEBUG
#include <linux/smp.h>
static inline u64 get_pcpu_id(void)
--
2.25.1
