Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf

Cross-merge bpf fixes after downstream PR.

No conflicts.

Adjacent changes in:

include/linux/bpf.h
include/uapi/linux/bpf.h
kernel/bpf/btf.c
kernel/bpf/helpers.c
kernel/bpf/syscall.c
kernel/bpf/verifier.c
kernel/trace/bpf_trace.c
mm/slab_common.c
tools/include/uapi/linux/bpf.h
tools/testing/selftests/bpf/Makefile

Link: https://lore.kernel.org/all/20241024215724.60017-1-daniel@iogearbox.net/
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

6 files changed, 31 insertions, 19 deletions

diff --git a/arch/arm64/include/asm/cputype.h b/arch/arm64/include/asm/cputype.h
index 5a7dfeb8e8eb..488f8e751349 100644
--- a/arch/arm64/include/asm/cputype.h
+++ b/arch/arm64/include/asm/cputype.h
@@ -94,6 +94,7 @@
 #define ARM_CPU_PART_NEOVERSE_V3	0xD84
 #define ARM_CPU_PART_CORTEX_X925	0xD85
 #define ARM_CPU_PART_CORTEX_A725	0xD87
+#define ARM_CPU_PART_NEOVERSE_N3	0xD8E
 
 #define APM_CPU_PART_XGENE		0x000
 #define APM_CPU_VAR_POTENZA		0x00
@@ -176,6 +177,7 @@
 #define MIDR_NEOVERSE_V3 MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_NEOVERSE_V3)
 #define MIDR_CORTEX_X925 MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_CORTEX_X925)
 #define MIDR_CORTEX_A725 MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_CORTEX_A725)
+#define MIDR_NEOVERSE_N3 MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_NEOVERSE_N3)
 #define MIDR_THUNDERX	MIDR_CPU_MODEL(ARM_CPU_IMP_CAVIUM, CAVIUM_CPU_PART_THUNDERX)
 #define MIDR_THUNDERX_81XX MIDR_CPU_MODEL(ARM_CPU_IMP_CAVIUM, CAVIUM_CPU_PART_THUNDERX_81XX)
 #define MIDR_THUNDERX_83XX MIDR_CPU_MODEL(ARM_CPU_IMP_CAVIUM, CAVIUM_CPU_PART_THUNDERX_83XX)
diff --git a/arch/arm64/include/asm/kvm_asm.h b/arch/arm64/include/asm/kvm_asm.h
index b36a3b6cc011..67afac659231 100644
--- a/arch/arm64/include/asm/kvm_asm.h
+++ b/arch/arm64/include/asm/kvm_asm.h
@@ -178,6 +178,7 @@ struct kvm_nvhe_init_params {
 	unsigned long hcr_el2;
 	unsigned long vttbr;
 	unsigned long vtcr;
+	unsigned long tmp;
 };
 
 /*
diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index 329619c6fa96..bf64fed9820e 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -51,6 +51,7 @@
 #define KVM_REQ_RELOAD_PMU	KVM_ARCH_REQ(5)
 #define KVM_REQ_SUSPEND		KVM_ARCH_REQ(6)
 #define KVM_REQ_RESYNC_PMU_EL0	KVM_ARCH_REQ(7)
+#define KVM_REQ_NESTED_S2_UNMAP	KVM_ARCH_REQ(8)
 
 #define KVM_DIRTY_LOG_MANUAL_CAPS   (KVM_DIRTY_LOG_MANUAL_PROTECT_ENABLE | \
 				     KVM_DIRTY_LOG_INITIALLY_SET)
@@ -212,6 +213,12 @@ struct kvm_s2_mmu {
 	bool	nested_stage2_enabled;
 
 	/*
+	 * true when this MMU needs to be unmapped before being used for a new
+	 * purpose.
+	 */
+	bool	pending_unmap;
+
+	/*
 	 *  0: Nobody is currently using this, check vttbr for validity
 	 * >0: Somebody is actively using this.
 	 */
@@ -1441,11 +1448,6 @@ void kvm_set_vm_id_reg(struct kvm *kvm, u32 reg, u64 val);
 		sign_extend64(__val, id##_##fld##_WIDTH - 1);		\
 	})
 
-#define expand_field_sign(id, fld, val)					\
-	(id##_##fld##_SIGNED ?						\
-	 __expand_field_sign_signed(id, fld, val) :			\
-	 __expand_field_sign_unsigned(id, fld, val))
-
 #define get_idreg_field_unsigned(kvm, id, fld)				\
 	({								\
 		u64 __val = kvm_read_vm_id_reg((kvm), SYS_##id);	\
@@ -1461,20 +1463,26 @@ void kvm_set_vm_id_reg(struct kvm *kvm, u32 reg, u64 val);
 #define get_idreg_field_enum(kvm, id, fld)				\
 	get_idreg_field_unsigned(kvm, id, fld)
 
-#define get_idreg_field(kvm, id, fld)					\
+#define kvm_cmp_feat_signed(kvm, id, fld, op, limit)			\
+	(get_idreg_field_signed((kvm), id, fld) op __expand_field_sign_signed(id, fld, limit))
+
+#define kvm_cmp_feat_unsigned(kvm, id, fld, op, limit)			\
+	(get_idreg_field_unsigned((kvm), id, fld) op __expand_field_sign_unsigned(id, fld, limit))
+
+#define kvm_cmp_feat(kvm, id, fld, op, limit)				\
 	(id##_##fld##_SIGNED ?						\
-	 get_idreg_field_signed(kvm, id, fld) :				\
-	 get_idreg_field_unsigned(kvm, id, fld))
+	 kvm_cmp_feat_signed(kvm, id, fld, op, limit) :			\
+	 kvm_cmp_feat_unsigned(kvm, id, fld, op, limit))
 
 #define kvm_has_feat(kvm, id, fld, limit)				\
-	(get_idreg_field((kvm), id, fld) >= expand_field_sign(id, fld, limit))
+	kvm_cmp_feat(kvm, id, fld, >=, limit)
 
 #define kvm_has_feat_enum(kvm, id, fld, val)				\
-	(get_idreg_field_unsigned((kvm), id, fld) == __expand_field_sign_unsigned(id, fld, val))
+	kvm_cmp_feat_unsigned(kvm, id, fld, ==, val)
 
 #define kvm_has_feat_range(kvm, id, fld, min, max)			\
-	(get_idreg_field((kvm), id, fld) >= expand_field_sign(id, fld, min) && \
-	 get_idreg_field((kvm), id, fld) <= expand_field_sign(id, fld, max))
+	(kvm_cmp_feat(kvm, id, fld, >=, min) &&				\
+	kvm_cmp_feat(kvm, id, fld, <=, max))
 
 /* Check for a given level of PAuth support */
 #define kvm_has_pauth(k, l)						\
diff --git a/arch/arm64/include/asm/kvm_mmu.h b/arch/arm64/include/asm/kvm_mmu.h
index cd4087fbda9a..66d93e320ec8 100644
--- a/arch/arm64/include/asm/kvm_mmu.h
+++ b/arch/arm64/include/asm/kvm_mmu.h
@@ -166,7 +166,8 @@ int create_hyp_exec_mappings(phys_addr_t phys_addr, size_t size,
 int create_hyp_stack(phys_addr_t phys_addr, unsigned long *haddr);
 void __init free_hyp_pgds(void);
 
-void kvm_stage2_unmap_range(struct kvm_s2_mmu *mmu, phys_addr_t start, u64 size);
+void kvm_stage2_unmap_range(struct kvm_s2_mmu *mmu, phys_addr_t start,
+			    u64 size, bool may_block);
 void kvm_stage2_flush_range(struct kvm_s2_mmu *mmu, phys_addr_t addr, phys_addr_t end);
 void kvm_stage2_wp_range(struct kvm_s2_mmu *mmu, phys_addr_t addr, phys_addr_t end);
 
diff --git a/arch/arm64/include/asm/kvm_nested.h b/arch/arm64/include/asm/kvm_nested.h
index e8bc6d67aba2..233e65522716 100644
--- a/arch/arm64/include/asm/kvm_nested.h
+++ b/arch/arm64/include/asm/kvm_nested.h
@@ -78,6 +78,8 @@ extern void kvm_s2_mmu_iterate_by_vmid(struct kvm *kvm, u16 vmid,
 extern void kvm_vcpu_load_hw_mmu(struct kvm_vcpu *vcpu);
 extern void kvm_vcpu_put_hw_mmu(struct kvm_vcpu *vcpu);
 
+extern void check_nested_vcpu_requests(struct kvm_vcpu *vcpu);
+
 struct kvm_s2_trans {
 	phys_addr_t output;
 	unsigned long block_size;
@@ -124,7 +126,7 @@ extern int kvm_s2_handle_perm_fault(struct kvm_vcpu *vcpu,
 				    struct kvm_s2_trans *trans);
 extern int kvm_inject_s2_fault(struct kvm_vcpu *vcpu, u64 esr_el2);
 extern void kvm_nested_s2_wp(struct kvm *kvm);
-extern void kvm_nested_s2_unmap(struct kvm *kvm);
+extern void kvm_nested_s2_unmap(struct kvm *kvm, bool may_block);
 extern void kvm_nested_s2_flush(struct kvm *kvm);
 
 unsigned long compute_tlb_inval_range(struct kvm_s2_mmu *mmu, u64 val);
diff --git a/arch/arm64/include/asm/uprobes.h b/arch/arm64/include/asm/uprobes.h
index 2b09495499c6..014b02897f8e 100644
--- a/arch/arm64/include/asm/uprobes.h
+++ b/arch/arm64/include/asm/uprobes.h
@@ -10,11 +10,9 @@
 #include <asm/insn.h>
 #include <asm/probes.h>
 
-#define MAX_UINSN_BYTES		AARCH64_INSN_SIZE
-
 #define UPROBE_SWBP_INSN	cpu_to_le32(BRK64_OPCODE_UPROBES)
 #define UPROBE_SWBP_INSN_SIZE	AARCH64_INSN_SIZE
-#define UPROBE_XOL_SLOT_BYTES	MAX_UINSN_BYTES
+#define UPROBE_XOL_SLOT_BYTES	AARCH64_INSN_SIZE
 
 typedef __le32 uprobe_opcode_t;
 
@@ -23,8 +21,8 @@ struct arch_uprobe_task {
 
 struct arch_uprobe {
 	union {
-		u8 insn[MAX_UINSN_BYTES];
-		u8 ixol[MAX_UINSN_BYTES];
+		__le32 insn;
+		__le32 ixol;
 	};
 	struct arch_probe_insn api;
 	bool simulate;