KVM: arm64: Turn __KVM_HOST_SMCCC_FUNC_* into an enum (mostly)

__KVM_HOST_SMCCC_FUNC_* is a royal pain, as there is a fair amount
of churn around these #defines, and we avoid making it an enum
only for the sake of the early init, low level code that requires
__KVM_HOST_SMCCC_FUNC___kvm_hyp_init to be usable from assembly.

Let's be brave and turn everything but this symbol into an enum,
using a bit of arithmetic to avoid any overlap.

Acked-by: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/877depq9gw.wl-maz@kernel.org
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20211008135839.1193-2-will@kernel.org

diff --git a/arch/arm64/include/asm/kvm_asm.h b/arch/arm64/include/asm/kvm_asm.h
index e86045a..43b5e21 100644 (file)
--- a/arch/arm64/include/asm/kvm_asm.h
+++ b/arch/arm64/include/asm/kvm_asm.h
@@ -44,31 +44,35 @@
 #define KVM_HOST_SMCCC_FUNC(name) KVM_HOST_SMCCC_ID(__KVM_HOST_SMCCC_FUNC_##name)
 
 #define __KVM_HOST_SMCCC_FUNC___kvm_hyp_init                   0
-#define __KVM_HOST_SMCCC_FUNC___kvm_vcpu_run                   1
-#define __KVM_HOST_SMCCC_FUNC___kvm_flush_vm_context           2
-#define __KVM_HOST_SMCCC_FUNC___kvm_tlb_flush_vmid_ipa         3
-#define __KVM_HOST_SMCCC_FUNC___kvm_tlb_flush_vmid             4
-#define __KVM_HOST_SMCCC_FUNC___kvm_flush_cpu_context          5
-#define __KVM_HOST_SMCCC_FUNC___kvm_timer_set_cntvoff          6
-#define __KVM_HOST_SMCCC_FUNC___kvm_enable_ssbs                        7
-#define __KVM_HOST_SMCCC_FUNC___vgic_v3_get_gic_config         8
-#define __KVM_HOST_SMCCC_FUNC___vgic_v3_read_vmcr              9
-#define __KVM_HOST_SMCCC_FUNC___vgic_v3_write_vmcr             10
-#define __KVM_HOST_SMCCC_FUNC___vgic_v3_init_lrs               11
-#define __KVM_HOST_SMCCC_FUNC___kvm_get_mdcr_el2               12
-#define __KVM_HOST_SMCCC_FUNC___vgic_v3_save_aprs              13
-#define __KVM_HOST_SMCCC_FUNC___vgic_v3_restore_aprs           14
-#define __KVM_HOST_SMCCC_FUNC___pkvm_init                      15
-#define __KVM_HOST_SMCCC_FUNC___pkvm_host_share_hyp            16
-#define __KVM_HOST_SMCCC_FUNC___pkvm_create_private_mapping    17
-#define __KVM_HOST_SMCCC_FUNC___pkvm_cpu_set_vector            18
-#define __KVM_HOST_SMCCC_FUNC___pkvm_prot_finalize             19
-#define __KVM_HOST_SMCCC_FUNC___kvm_adjust_pc                  20
 
 #ifndef __ASSEMBLY__
 
 #include <linux/mm.h>
 
+enum __kvm_host_smccc_func {
+       /* __KVM_HOST_SMCCC_FUNC___kvm_hyp_init */
+       __KVM_HOST_SMCCC_FUNC___kvm_vcpu_run = __KVM_HOST_SMCCC_FUNC___kvm_hyp_init + 1,
+       __KVM_HOST_SMCCC_FUNC___kvm_flush_vm_context,
+       __KVM_HOST_SMCCC_FUNC___kvm_tlb_flush_vmid_ipa,
+       __KVM_HOST_SMCCC_FUNC___kvm_tlb_flush_vmid,
+       __KVM_HOST_SMCCC_FUNC___kvm_flush_cpu_context,
+       __KVM_HOST_SMCCC_FUNC___kvm_timer_set_cntvoff,
+       __KVM_HOST_SMCCC_FUNC___kvm_enable_ssbs,
+       __KVM_HOST_SMCCC_FUNC___vgic_v3_get_gic_config,
+       __KVM_HOST_SMCCC_FUNC___vgic_v3_read_vmcr,
+       __KVM_HOST_SMCCC_FUNC___vgic_v3_write_vmcr,
+       __KVM_HOST_SMCCC_FUNC___vgic_v3_init_lrs,
+       __KVM_HOST_SMCCC_FUNC___kvm_get_mdcr_el2,
+       __KVM_HOST_SMCCC_FUNC___vgic_v3_save_aprs,
+       __KVM_HOST_SMCCC_FUNC___vgic_v3_restore_aprs,
+       __KVM_HOST_SMCCC_FUNC___pkvm_init,
+       __KVM_HOST_SMCCC_FUNC___pkvm_host_share_hyp,
+       __KVM_HOST_SMCCC_FUNC___pkvm_create_private_mapping,
+       __KVM_HOST_SMCCC_FUNC___pkvm_cpu_set_vector,
+       __KVM_HOST_SMCCC_FUNC___pkvm_prot_finalize,
+       __KVM_HOST_SMCCC_FUNC___kvm_adjust_pc,
+};
+
 #define DECLARE_KVM_VHE_SYM(sym)       extern char sym[]
 #define DECLARE_KVM_NVHE_SYM(sym)      extern char kvm_nvhe_sym(sym)[]