KVM: arm64: MDCR_EL2 is a 64-bit register

Fix the places in KVM that treat MDCR_EL2 as a 32-bit register.
More recent features (e.g., FEAT_SPEv1p2) use bits above 31.

No functional change intended.
Acked-by: Will Deacon <will@kernel.org>
Signed-off-by: Fuad Tabba <tabba@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20210817081134.2918285-4-tabba@google.com

arch/arm64/include/asm/kvm_arm.h

@@ -281,18 +281,18 @@
 /* Hyp Debug Configuration Register bits */
 #define MDCR_EL2_E2TB_MASK	(UL(0x3))
 #define MDCR_EL2_E2TB_SHIFT	(UL(24))
-#define MDCR_EL2_TTRF		(1 << 19)
-#define MDCR_EL2_TPMS		(1 << 14)
+#define MDCR_EL2_TTRF		(UL(1) << 19)
+#define MDCR_EL2_TPMS		(UL(1) << 14)
 #define MDCR_EL2_E2PB_MASK	(UL(0x3))
 #define MDCR_EL2_E2PB_SHIFT	(UL(12))
-#define MDCR_EL2_TDRA		(1 << 11)
-#define MDCR_EL2_TDOSA		(1 << 10)
-#define MDCR_EL2_TDA		(1 << 9)
-#define MDCR_EL2_TDE		(1 << 8)
-#define MDCR_EL2_HPME		(1 << 7)
-#define MDCR_EL2_TPM		(1 << 6)
-#define MDCR_EL2_TPMCR		(1 << 5)
-#define MDCR_EL2_HPMN_MASK	(0x1F)
+#define MDCR_EL2_TDRA		(UL(1) << 11)
+#define MDCR_EL2_TDOSA		(UL(1) << 10)
+#define MDCR_EL2_TDA		(UL(1) << 9)
+#define MDCR_EL2_TDE		(UL(1) << 8)
+#define MDCR_EL2_HPME		(UL(1) << 7)
+#define MDCR_EL2_TPM		(UL(1) << 6)
+#define MDCR_EL2_TPMCR		(UL(1) << 5)
+#define MDCR_EL2_HPMN_MASK	(UL(0x1F))
 
 /* For compatibility with fault code shared with 32-bit */
 #define FSC_FAULT	ESR_ELx_FSC_FAULT

arch/arm64/include/asm/kvm_asm.h

@@ -210,7 +210,7 @@ extern u64 __vgic_v3_read_vmcr(void);
 extern void __vgic_v3_write_vmcr(u32 vmcr);
 extern void __vgic_v3_init_lrs(void);
 
-extern u32 __kvm_get_mdcr_el2(void);
+extern u64 __kvm_get_mdcr_el2(void);
 
 #define __KVM_EXTABLE(from, to)						\
 	"	.pushsection	__kvm_ex_table, \"a\"\n"		\

arch/arm64/include/asm/kvm_host.h

@@ -289,7 +289,7 @@ struct kvm_vcpu_arch {
 
 	/* HYP configuration */
 	u64 hcr_el2;
-	u32 mdcr_el2;
+	u64 mdcr_el2;
 
 	/* Exception Information */
 	struct kvm_vcpu_fault_info fault;

arch/arm64/kvm/debug.c

@@ -21,7 +21,7 @@
 				DBG_MDSCR_KDE | \
 				DBG_MDSCR_MDE)
 
-static DEFINE_PER_CPU(u32, mdcr_el2);
+static DEFINE_PER_CPU(u64, mdcr_el2);
 
 /**
  * save/restore_guest_debug_regs

arch/arm64/kvm/hyp/nvhe/debug-sr.c

@@ -109,7 +109,7 @@ void __debug_switch_to_host(struct kvm_vcpu *vcpu)
 	__debug_switch_to_host_common(vcpu);
 }
 
-u32 __kvm_get_mdcr_el2(void)
+u64 __kvm_get_mdcr_el2(void)
 {
 	return read_sysreg(mdcr_el2);
 }

arch/arm64/kvm/hyp/vhe/debug-sr.c

@@ -20,7 +20,7 @@ void __debug_switch_to_host(struct kvm_vcpu *vcpu)
 	__debug_switch_to_host_common(vcpu);
 }
 
-u32 __kvm_get_mdcr_el2(void)
+u64 __kvm_get_mdcr_el2(void)
 {
 	return read_sysreg(mdcr_el2);
 }