Merge branch kvm-arm64/misc-5.19 into kvmarm-master/next

* kvm-arm64/misc-5.19:
  : .
  : Misc fixes and general improvements for KVMM/arm64:
  :
  : - Better handle out of sequence sysregs in the global tables
  :
  : - Remove a couple of unnecessary loads from constant pool
  :
  : - Drop unnecessary pKVM checks
  :
  : - Add all known M1 implementations to the SEIS workaround
  :
  : - Cleanup kerneldoc warnings
  : .
  KVM: arm64: vgic-v3: List M1 Pro/Max as requiring the SEIS workaround
  KVM: arm64: pkvm: Don't mask already zeroed FEAT_SVE
  KVM: arm64: pkvm: Drop unnecessary FP/SIMD trap handler
  KVM: arm64: nvhe: Eliminate kernel-doc warnings
  KVM: arm64: Avoid unnecessary absolute addressing via literals
  KVM: arm64: Print emulated register table name when it is unsorted
  KVM: arm64: Don't BUG_ON() if emulated register table is unsorted

Signed-off-by: Marc Zyngier <maz@kernel.org>

Author: Marc Zyngier

arch/arm64/include/asm/cputype.h

@@ -118,6 +118,10 @@
 
 #define APPLE_CPU_PART_M1_ICESTORM	0x022
 #define APPLE_CPU_PART_M1_FIRESTORM	0x023
+#define APPLE_CPU_PART_M1_ICESTORM_PRO	0x024
+#define APPLE_CPU_PART_M1_FIRESTORM_PRO	0x025
+#define APPLE_CPU_PART_M1_ICESTORM_MAX	0x028
+#define APPLE_CPU_PART_M1_FIRESTORM_MAX	0x029
 
 #define MIDR_CORTEX_A53 MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_CORTEX_A53)
 #define MIDR_CORTEX_A57 MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_CORTEX_A57)
@@ -164,6 +168,10 @@
 #define MIDR_HISI_TSV110 MIDR_CPU_MODEL(ARM_CPU_IMP_HISI, HISI_CPU_PART_TSV110)
 #define MIDR_APPLE_M1_ICESTORM MIDR_CPU_MODEL(ARM_CPU_IMP_APPLE, APPLE_CPU_PART_M1_ICESTORM)
 #define MIDR_APPLE_M1_FIRESTORM MIDR_CPU_MODEL(ARM_CPU_IMP_APPLE, APPLE_CPU_PART_M1_FIRESTORM)
+#define MIDR_APPLE_M1_ICESTORM_PRO MIDR_CPU_MODEL(ARM_CPU_IMP_APPLE, APPLE_CPU_PART_M1_ICESTORM_PRO)
+#define MIDR_APPLE_M1_FIRESTORM_PRO MIDR_CPU_MODEL(ARM_CPU_IMP_APPLE, APPLE_CPU_PART_M1_FIRESTORM_PRO)
+#define MIDR_APPLE_M1_ICESTORM_MAX MIDR_CPU_MODEL(ARM_CPU_IMP_APPLE, APPLE_CPU_PART_M1_ICESTORM_MAX)
+#define MIDR_APPLE_M1_FIRESTORM_MAX MIDR_CPU_MODEL(ARM_CPU_IMP_APPLE, APPLE_CPU_PART_M1_FIRESTORM_MAX)
 
 /* Fujitsu Erratum 010001 affects A64FX 1.0 and 1.1, (v0r0 and v1r0) */
 #define MIDR_FUJITSU_ERRATUM_010001		MIDR_FUJITSU_A64FX

arch/arm64/include/asm/kvm_host.h

@@ -705,7 +705,7 @@ int kvm_handle_cp10_id(struct kvm_vcpu *vcpu);
 
 void kvm_reset_sys_regs(struct kvm_vcpu *vcpu);
 
-void kvm_sys_reg_table_init(void);
+int kvm_sys_reg_table_init(void);
 
 /* MMIO helpers */
 void kvm_mmio_write_buf(void *buf, unsigned int len, unsigned long data);

arch/arm64/kvm/arm.c

@@ -1829,8 +1829,6 @@ static int init_subsystems(void)
 
 	kvm_register_perf_callbacks(NULL);
 
-	kvm_sys_reg_table_init();
-
 out:
 	if (err || !is_protected_kvm_enabled())
 		on_each_cpu(_kvm_arch_hardware_disable, NULL, 1);
@@ -2189,6 +2187,12 @@ int kvm_arch_init(void *opaque)
 		return -ENODEV;
 	}
 
+	err = kvm_sys_reg_table_init();
+	if (err) {
+		kvm_info("Error initializing system register tables");
+		return err;
+	}
+
 	in_hyp_mode = is_kernel_in_hyp_mode();
 
 	if (cpus_have_final_cap(ARM64_WORKAROUND_DEVICE_LOAD_ACQUIRE) ||

arch/arm64/kvm/hyp/nvhe/host.S

@@ -80,7 +80,7 @@ SYM_FUNC_START(__hyp_do_panic)
 	mov	lr, #(PSR_F_BIT | PSR_I_BIT | PSR_A_BIT | PSR_D_BIT |\
 		      PSR_MODE_EL1h)
 	msr	spsr_el2, lr
-	ldr	lr, =nvhe_hyp_panic_handler
+	adr_l	lr, nvhe_hyp_panic_handler
 	hyp_kimg_va lr, x6
 	msr	elr_el2, lr
 
@@ -125,13 +125,11 @@ alternative_else_nop_endif
 	add	sp, sp, #16
 	/*
 	 * Compute the idmap address of __kvm_handle_stub_hvc and
-	 * jump there. Since we use kimage_voffset, do not use the
-	 * HYP VA for __kvm_handle_stub_hvc, but the kernel VA instead
-	 * (by loading it from the constant pool).
+	 * jump there.
 	 *
 	 * Preserve x0-x4, which may contain stub parameters.
 	 */
-	ldr	x5, =__kvm_handle_stub_hvc
+	adr_l	x5, __kvm_handle_stub_hvc
 	hyp_pa	x5, x6
 	br	x5
 SYM_FUNC_END(__host_hvc)

arch/arm64/kvm/hyp/nvhe/switch.c

@@ -150,7 +150,7 @@ static void __hyp_vgic_restore_state(struct kvm_vcpu *vcpu)
 	}
 }
 
-/**
+/*
  * Disable host events, enable guest events
  */
 #ifdef CONFIG_HW_PERF_EVENTS
@@ -167,7 +167,7 @@ static bool __pmu_switch_to_guest(struct kvm_vcpu *vcpu)
 	return (pmu->events_host || pmu->events_guest);
 }
 
-/**
+/*
  * Disable guest events, enable host events
  */
 static void __pmu_switch_to_host(struct kvm_vcpu *vcpu)
@@ -185,7 +185,7 @@ static void __pmu_switch_to_host(struct kvm_vcpu *vcpu)
 #define __pmu_switch_to_host(v)		do {} while (0)
 #endif
 
-/**
+/*
  * Handler for protected VM MSR, MRS or System instruction execution in AArch64.
  *
  * Returns true if the hypervisor has handled the exit, and control should go
@@ -202,23 +202,6 @@ static bool kvm_handle_pvm_sys64(struct kvm_vcpu *vcpu, u64 *exit_code)
 		kvm_handle_pvm_sysreg(vcpu, exit_code));
 }
 
-/**
- * Handler for protected floating-point and Advanced SIMD accesses.
- *
- * Returns true if the hypervisor has handled the exit, and control should go
- * back to the guest, or false if it hasn't.
- */
-static bool kvm_handle_pvm_fpsimd(struct kvm_vcpu *vcpu, u64 *exit_code)
-{
-	/* Linux guests assume support for floating-point and Advanced SIMD. */
-	BUILD_BUG_ON(!FIELD_GET(ARM64_FEATURE_MASK(ID_AA64PFR0_FP),
-				PVM_ID_AA64PFR0_ALLOW));
-	BUILD_BUG_ON(!FIELD_GET(ARM64_FEATURE_MASK(ID_AA64PFR0_ASIMD),
-				PVM_ID_AA64PFR0_ALLOW));
-
-	return kvm_hyp_handle_fpsimd(vcpu, exit_code);
-}
-
 static const exit_handler_fn hyp_exit_handlers[] = {
 	[0 ... ESR_ELx_EC_MAX]		= NULL,
 	[ESR_ELx_EC_CP15_32]		= kvm_hyp_handle_cp15_32,
@@ -234,7 +217,7 @@ static const exit_handler_fn pvm_exit_handlers[] = {
 	[0 ... ESR_ELx_EC_MAX]		= NULL,
 	[ESR_ELx_EC_SYS64]		= kvm_handle_pvm_sys64,
 	[ESR_ELx_EC_SVE]		= kvm_handle_pvm_restricted,
-	[ESR_ELx_EC_FP_ASIMD]		= kvm_handle_pvm_fpsimd,
+	[ESR_ELx_EC_FP_ASIMD]		= kvm_hyp_handle_fpsimd,
 	[ESR_ELx_EC_IABT_LOW]		= kvm_hyp_handle_iabt_low,
 	[ESR_ELx_EC_DABT_LOW]		= kvm_hyp_handle_dabt_low,
 	[ESR_ELx_EC_PAC]		= kvm_hyp_handle_ptrauth,

arch/arm64/kvm/hyp/nvhe/sys_regs.c

@@ -90,9 +90,6 @@ static u64 get_pvm_id_aa64pfr0(const struct kvm_vcpu *vcpu)
 	u64 set_mask = 0;
 	u64 allow_mask = PVM_ID_AA64PFR0_ALLOW;
 
-	if (!vcpu_has_sve(vcpu))
-		allow_mask &= ~ARM64_FEATURE_MASK(ID_AA64PFR0_SVE);
-
 	set_mask |= get_restricted_features_unsigned(id_aa64pfr0_el1_sys_val,
 		PVM_ID_AA64PFR0_RESTRICT_UNSIGNED);
 

arch/arm64/kvm/sys_regs.c

@@ -2198,25 +2198,24 @@ static const struct sys_reg_desc cp15_64_regs[] = {
 	{ SYS_DESC(SYS_AARCH32_CNTP_CVAL),    access_arch_timer },
 };
 
-static int check_sysreg_table(const struct sys_reg_desc *table, unsigned int n,
-			      bool is_32)
+static bool check_sysreg_table(const struct sys_reg_desc *table, unsigned int n,
+			       bool is_32)
 {
 	unsigned int i;
 
 	for (i = 0; i < n; i++) {
 		if (!is_32 && table[i].reg && !table[i].reset) {
-			kvm_err("sys_reg table %p entry %d has lacks reset\n",
-				table, i);
-			return 1;
+			kvm_err("sys_reg table %pS entry %d lacks reset\n", &table[i], i);
+			return false;
 		}
 
 		if (i && cmp_sys_reg(&table[i-1], &table[i]) >= 0) {
-			kvm_err("sys_reg table %p out of order (%d)\n", table, i - 1);
-			return 1;
+			kvm_err("sys_reg table %pS entry %d out of order\n", &table[i - 1], i - 1);
+			return false;
 		}
 	}
 
-	return 0;
+	return true;
 }
 
 int kvm_handle_cp14_load_store(struct kvm_vcpu *vcpu)
@@ -3008,18 +3007,22 @@ int kvm_arm_copy_sys_reg_indices(struct kvm_vcpu *vcpu, u64 __user *uindices)
 	return write_demux_regids(uindices);
 }
 
-void kvm_sys_reg_table_init(void)
+int kvm_sys_reg_table_init(void)
 {
+	bool valid = true;
 	unsigned int i;
 	struct sys_reg_desc clidr;
 
 	/* Make sure tables are unique and in order. */
-	BUG_ON(check_sysreg_table(sys_reg_descs, ARRAY_SIZE(sys_reg_descs), false));
-	BUG_ON(check_sysreg_table(cp14_regs, ARRAY_SIZE(cp14_regs), true));
-	BUG_ON(check_sysreg_table(cp14_64_regs, ARRAY_SIZE(cp14_64_regs), true));
-	BUG_ON(check_sysreg_table(cp15_regs, ARRAY_SIZE(cp15_regs), true));
-	BUG_ON(check_sysreg_table(cp15_64_regs, ARRAY_SIZE(cp15_64_regs), true));
-	BUG_ON(check_sysreg_table(invariant_sys_regs, ARRAY_SIZE(invariant_sys_regs), false));
+	valid &= check_sysreg_table(sys_reg_descs, ARRAY_SIZE(sys_reg_descs), false);
+	valid &= check_sysreg_table(cp14_regs, ARRAY_SIZE(cp14_regs), true);
+	valid &= check_sysreg_table(cp14_64_regs, ARRAY_SIZE(cp14_64_regs), true);
+	valid &= check_sysreg_table(cp15_regs, ARRAY_SIZE(cp15_regs), true);
+	valid &= check_sysreg_table(cp15_64_regs, ARRAY_SIZE(cp15_64_regs), true);
+	valid &= check_sysreg_table(invariant_sys_regs, ARRAY_SIZE(invariant_sys_regs), false);
+
+	if (!valid)
+		return -EINVAL;
 
 	/* We abuse the reset function to overwrite the table itself. */
 	for (i = 0; i < ARRAY_SIZE(invariant_sys_regs); i++)
@@ -3042,4 +3045,6 @@ void kvm_sys_reg_table_init(void)
 			break;
 	/* Clear all higher bits. */
 	cache_levels &= (1 << (i*3))-1;
+
+	return 0;
 }

arch/arm64/kvm/vgic/vgic-v3.c

@@ -612,6 +612,10 @@ early_param("kvm-arm.vgic_v4_enable", early_gicv4_enable);
 static const struct midr_range broken_seis[] = {
 	MIDR_ALL_VERSIONS(MIDR_APPLE_M1_ICESTORM),
 	MIDR_ALL_VERSIONS(MIDR_APPLE_M1_FIRESTORM),
+	MIDR_ALL_VERSIONS(MIDR_APPLE_M1_ICESTORM_PRO),
+	MIDR_ALL_VERSIONS(MIDR_APPLE_M1_FIRESTORM_PRO),
+	MIDR_ALL_VERSIONS(MIDR_APPLE_M1_ICESTORM_MAX),
+	MIDR_ALL_VERSIONS(MIDR_APPLE_M1_FIRESTORM_MAX),
 	{},
 };