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-rw-r--r--arch/arm64/kvm/sys_regs.c63
1 files changed, 43 insertions, 20 deletions
diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index 6d0511247df4..9569772cf09a 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c
@@ -1144,6 +1144,20 @@ static unsigned int id_visibility(const struct kvm_vcpu *vcpu,
return 0;
}
+static unsigned int aa32_id_visibility(const struct kvm_vcpu *vcpu,
+ const struct sys_reg_desc *r)
+{
+ /*
+ * AArch32 ID registers are UNKNOWN if AArch32 isn't implemented at any
+ * EL. Promote to RAZ/WI in order to guarantee consistency between
+ * systems.
+ */
+ if (!kvm_supports_32bit_el0())
+ return REG_RAZ | REG_USER_WI;
+
+ return id_visibility(vcpu, r);
+}
+
static unsigned int raz_visibility(const struct kvm_vcpu *vcpu,
const struct sys_reg_desc *r)
{
@@ -1331,6 +1345,15 @@ static unsigned int mte_visibility(const struct kvm_vcpu *vcpu,
.visibility = id_visibility, \
}
+/* sys_reg_desc initialiser for known cpufeature ID registers */
+#define AA32_ID_SANITISED(name) { \
+ SYS_DESC(SYS_##name), \
+ .access = access_id_reg, \
+ .get_user = get_id_reg, \
+ .set_user = set_id_reg, \
+ .visibility = aa32_id_visibility, \
+}
+
/*
* sys_reg_desc initialiser for architecturally unallocated cpufeature ID
* register with encoding Op0=3, Op1=0, CRn=0, CRm=crm, Op2=op2
@@ -1418,33 +1441,33 @@ static const struct sys_reg_desc sys_reg_descs[] = {
/* AArch64 mappings of the AArch32 ID registers */
/* CRm=1 */
- ID_SANITISED(ID_PFR0_EL1),
- ID_SANITISED(ID_PFR1_EL1),
- ID_SANITISED(ID_DFR0_EL1),
+ AA32_ID_SANITISED(ID_PFR0_EL1),
+ AA32_ID_SANITISED(ID_PFR1_EL1),
+ AA32_ID_SANITISED(ID_DFR0_EL1),
ID_HIDDEN(ID_AFR0_EL1),
- ID_SANITISED(ID_MMFR0_EL1),
- ID_SANITISED(ID_MMFR1_EL1),
- ID_SANITISED(ID_MMFR2_EL1),
- ID_SANITISED(ID_MMFR3_EL1),
+ AA32_ID_SANITISED(ID_MMFR0_EL1),
+ AA32_ID_SANITISED(ID_MMFR1_EL1),
+ AA32_ID_SANITISED(ID_MMFR2_EL1),
+ AA32_ID_SANITISED(ID_MMFR3_EL1),
/* CRm=2 */
- ID_SANITISED(ID_ISAR0_EL1),
- ID_SANITISED(ID_ISAR1_EL1),
- ID_SANITISED(ID_ISAR2_EL1),
- ID_SANITISED(ID_ISAR3_EL1),
- ID_SANITISED(ID_ISAR4_EL1),
- ID_SANITISED(ID_ISAR5_EL1),
- ID_SANITISED(ID_MMFR4_EL1),
- ID_SANITISED(ID_ISAR6_EL1),
+ AA32_ID_SANITISED(ID_ISAR0_EL1),
+ AA32_ID_SANITISED(ID_ISAR1_EL1),
+ AA32_ID_SANITISED(ID_ISAR2_EL1),
+ AA32_ID_SANITISED(ID_ISAR3_EL1),
+ AA32_ID_SANITISED(ID_ISAR4_EL1),
+ AA32_ID_SANITISED(ID_ISAR5_EL1),
+ AA32_ID_SANITISED(ID_MMFR4_EL1),
+ AA32_ID_SANITISED(ID_ISAR6_EL1),
/* CRm=3 */
- ID_SANITISED(MVFR0_EL1),
- ID_SANITISED(MVFR1_EL1),
- ID_SANITISED(MVFR2_EL1),
+ AA32_ID_SANITISED(MVFR0_EL1),
+ AA32_ID_SANITISED(MVFR1_EL1),
+ AA32_ID_SANITISED(MVFR2_EL1),
ID_UNALLOCATED(3,3),
- ID_SANITISED(ID_PFR2_EL1),
+ AA32_ID_SANITISED(ID_PFR2_EL1),
ID_HIDDEN(ID_DFR1_EL1),
- ID_SANITISED(ID_MMFR5_EL1),
+ AA32_ID_SANITISED(ID_MMFR5_EL1),
ID_UNALLOCATED(3,7),
/* AArch64 ID registers */