diff options
| -rw-r--r-- | arch/arm64/include/asm/kvm_arm.h | 4 | ||||
| -rw-r--r-- | arch/arm64/include/asm/sysreg.h | 6 | ||||
| -rw-r--r-- | arch/arm64/kernel/head.S | 7 | ||||
| -rw-r--r-- | arch/arm64/kvm/sys_regs.c | 20 |
4 files changed, 36 insertions, 1 deletions
diff --git a/arch/arm64/include/asm/kvm_arm.h b/arch/arm64/include/asm/kvm_arm.h index b0c84171e6a3..1b438c334463 100644 --- a/arch/arm64/include/asm/kvm_arm.h +++ b/arch/arm64/include/asm/kvm_arm.h @@ -25,6 +25,7 @@ /* Hyp Configuration Register (HCR) bits */ #define HCR_TEA (UL(1) << 37) #define HCR_TERR (UL(1) << 36) +#define HCR_TLOR (UL(1) << 35) #define HCR_E2H (UL(1) << 34) #define HCR_ID (UL(1) << 33) #define HCR_CD (UL(1) << 32) @@ -64,6 +65,7 @@ /* * The bits we set in HCR: + * TLOR: Trap LORegion register accesses * RW: 64bit by default, can be overridden for 32bit VMs * TAC: Trap ACTLR * TSC: Trap SMC @@ -81,7 +83,7 @@ */ #define HCR_GUEST_FLAGS (HCR_TSC | HCR_TSW | HCR_TWE | HCR_TWI | HCR_VM | \ HCR_TVM | HCR_BSU_IS | HCR_FB | HCR_TAC | \ - HCR_AMO | HCR_SWIO | HCR_TIDCP | HCR_RW) + HCR_AMO | HCR_SWIO | HCR_TIDCP | HCR_RW | HCR_TLOR) #define HCR_VIRT_EXCP_MASK (HCR_VSE | HCR_VI | HCR_VF) #define HCR_INT_OVERRIDE (HCR_FMO | HCR_IMO) #define HCR_HOST_VHE_FLAGS (HCR_RW | HCR_TGE | HCR_E2H) diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h index 0e1960c59197..69a99856461c 100644 --- a/arch/arm64/include/asm/sysreg.h +++ b/arch/arm64/include/asm/sysreg.h @@ -288,6 +288,12 @@ #define SYS_MAIR_EL1 sys_reg(3, 0, 10, 2, 0) #define SYS_AMAIR_EL1 sys_reg(3, 0, 10, 3, 0) +#define SYS_LORSA_EL1 sys_reg(3, 0, 10, 4, 0) +#define SYS_LOREA_EL1 sys_reg(3, 0, 10, 4, 1) +#define SYS_LORN_EL1 sys_reg(3, 0, 10, 4, 2) +#define SYS_LORC_EL1 sys_reg(3, 0, 10, 4, 3) +#define SYS_LORID_EL1 sys_reg(3, 0, 10, 4, 7) + #define SYS_VBAR_EL1 sys_reg(3, 0, 12, 0, 0) #define SYS_DISR_EL1 sys_reg(3, 0, 12, 1, 1) diff --git a/arch/arm64/kernel/head.S b/arch/arm64/kernel/head.S index 2b6b8b24e5ab..b0853069702f 100644 --- a/arch/arm64/kernel/head.S +++ b/arch/arm64/kernel/head.S @@ -577,6 +577,13 @@ set_hcr: 7: msr mdcr_el2, x3 // Configure debug traps + /* LORegions */ + mrs x1, id_aa64mmfr1_el1 + ubfx x0, x1, #ID_AA64MMFR1_LOR_SHIFT, 4 + cbz x0, 1f + msr_s SYS_LORC_EL1, xzr +1: + /* Stage-2 translation */ msr vttbr_el2, xzr diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index 50a43c7b97ca..55982b565eb2 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -175,6 +175,14 @@ static bool trap_raz_wi(struct kvm_vcpu *vcpu, return read_zero(vcpu, p); } +static bool trap_undef(struct kvm_vcpu *vcpu, + struct sys_reg_params *p, + const struct sys_reg_desc *r) +{ + kvm_inject_undefined(vcpu); + return false; +} + static bool trap_oslsr_el1(struct kvm_vcpu *vcpu, struct sys_reg_params *p, const struct sys_reg_desc *r) @@ -893,6 +901,12 @@ static u64 read_id_reg(struct sys_reg_desc const *r, bool raz) task_pid_nr(current)); val &= ~(0xfUL << ID_AA64PFR0_SVE_SHIFT); + } else if (id == SYS_ID_AA64MMFR1_EL1) { + if (val & (0xfUL << ID_AA64MMFR1_LOR_SHIFT)) + pr_err_once("kvm [%i]: LORegions unsupported for guests, suppressing\n", + task_pid_nr(current)); + + val &= ~(0xfUL << ID_AA64MMFR1_LOR_SHIFT); } return val; @@ -1178,6 +1192,12 @@ static const struct sys_reg_desc sys_reg_descs[] = { { SYS_DESC(SYS_MAIR_EL1), access_vm_reg, reset_unknown, MAIR_EL1 }, { SYS_DESC(SYS_AMAIR_EL1), access_vm_reg, reset_amair_el1, AMAIR_EL1 }, + { SYS_DESC(SYS_LORSA_EL1), trap_undef }, + { SYS_DESC(SYS_LOREA_EL1), trap_undef }, + { SYS_DESC(SYS_LORN_EL1), trap_undef }, + { SYS_DESC(SYS_LORC_EL1), trap_undef }, + { SYS_DESC(SYS_LORID_EL1), trap_undef }, + { SYS_DESC(SYS_VBAR_EL1), NULL, reset_val, VBAR_EL1, 0 }, { SYS_DESC(SYS_DISR_EL1), NULL, reset_val, DISR_EL1, 0 }, |