KVM: arm64: Remove alternatives from sysreg accessors in VHE hypervisor context

In the VHE hypervisor code, we should be using the remapped VHE
accessors, no ifs, no buts. No need to generate any alternative.

Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230609162200.2024064-9-maz@kernel.org
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>

diff --git a/arch/arm64/include/asm/kvm_hyp.h b/arch/arm64/include/asm/kvm_hyp.h
index bdd9cf5..fea04eb 100644 (file)
--- a/arch/arm64/include/asm/kvm_hyp.h
+++ b/arch/arm64/include/asm/kvm_hyp.h
@@ -16,6 +16,23 @@ DECLARE_PER_CPU(struct kvm_cpu_context, kvm_hyp_ctxt);
 DECLARE_PER_CPU(unsigned long, kvm_hyp_vector);
 DECLARE_PER_CPU(struct kvm_nvhe_init_params, kvm_init_params);
 
+/*
+ * Unified accessors for registers that have a different encoding
+ * between VHE and non-VHE. They must be specified without their "ELx"
+ * encoding, but with the SYS_ prefix, as defined in asm/sysreg.h.
+ */
+
+#if defined(__KVM_VHE_HYPERVISOR__)
+
+#define read_sysreg_el0(r)     read_sysreg_s(r##_EL02)
+#define write_sysreg_el0(v,r)  write_sysreg_s(v, r##_EL02)
+#define read_sysreg_el1(r)     read_sysreg_s(r##_EL12)
+#define write_sysreg_el1(v,r)  write_sysreg_s(v, r##_EL12)
+#define read_sysreg_el2(r)     read_sysreg_s(r##_EL1)
+#define write_sysreg_el2(v,r)  write_sysreg_s(v, r##_EL1)
+
+#else // !__KVM_VHE_HYPERVISOR__
+
 #define read_sysreg_elx(r,nvh,vh)                                      \
        ({                                                              \
                u64 reg;                                                \
@@ -35,12 +52,6 @@ DECLARE_PER_CPU(struct kvm_nvhe_init_params, kvm_init_params);
                                         : : "rZ" (__val));             \
        } while (0)
 
-/*
- * Unified accessors for registers that have a different encoding
- * between VHE and non-VHE. They must be specified without their "ELx"
- * encoding, but with the SYS_ prefix, as defined in asm/sysreg.h.
- */
-
 #define read_sysreg_el0(r)     read_sysreg_elx(r, _EL0, _EL02)
 #define write_sysreg_el0(v,r)  write_sysreg_elx(v, r, _EL0, _EL02)
 #define read_sysreg_el1(r)     read_sysreg_elx(r, _EL1, _EL12)
@@ -48,6 +59,8 @@ DECLARE_PER_CPU(struct kvm_nvhe_init_params, kvm_init_params);
 #define read_sysreg_el2(r)     read_sysreg_elx(r, _EL2, _EL1)
 #define write_sysreg_el2(v,r)  write_sysreg_elx(v, r, _EL2, _EL1)
 
+#endif // __KVM_VHE_HYPERVISOR__
+
 /*
  * Without an __arch_swab32(), we fall back to ___constant_swab32(), but the
  * static inline can allow the compiler to out-of-line this. KVM always wants