Update to v6.6.66

Documentation/ABI/testing/sysfs-bus-pci

@@ -163,6 +163,17 @@ Description:
 		will be present in sysfs.  Writing 1 to this file
 		will perform reset.
 
+What:		/sys/bus/pci/devices/.../reset_subordinate
+Date:		October 2024
+Contact:	linux-pci@vger.kernel.org
+Description:
+		This is visible only for bridge devices. If you want to reset
+		all devices attached through the subordinate bus of a specific
+		bridge device, writing 1 to this will try to do it.  This will
+		affect all devices attached to the system through this bridge
+		similiar to writing 1 to their individual "reset" file, so use
+		with caution.
+
 What:		/sys/bus/pci/devices/.../vpd
 Date:		February 2008
 Contact:	Ben Hutchings <bwh@kernel.org>

Documentation/admin-guide/blockdev/zram.rst

@@ -328,7 +328,7 @@ as idle::
 From now on, any pages on zram are idle pages. The idle mark
 will be removed until someone requests access of the block.
 IOW, unless there is access request, those pages are still idle pages.
-Additionally, when CONFIG_ZRAM_MEMORY_TRACKING is enabled pages can be
+Additionally, when CONFIG_ZRAM_TRACK_ENTRY_ACTIME is enabled pages can be
 marked as idle based on how long (in seconds) it's been since they were
 last accessed::
 

Documentation/netlink/specs/ethtool.yaml

@@ -64,7 +64,12 @@ attribute-sets:
         name: bits
         type: nest
         nested-attributes: bitset-bits
-
+      -
+        name: value
+        type: binary
+      -
+        name: mask
+        type: binary
   -
     name: string
     attributes:

Makefile

@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 VERSION = 6
 PATCHLEVEL = 6
-SUBLEVEL = 65
+SUBLEVEL = 66
 EXTRAVERSION =
 NAME = Pinguïn Aangedreven
 

arch/arm64/kernel/ptrace.c

@@ -1385,7 +1385,7 @@ static int tagged_addr_ctrl_get(struct task_struct *target,
 {
 	long ctrl = get_tagged_addr_ctrl(target);
 
-	if (IS_ERR_VALUE(ctrl))
+	if (WARN_ON_ONCE(IS_ERR_VALUE(ctrl)))
 		return ctrl;
 
 	return membuf_write(&to, &ctrl, sizeof(ctrl));
@@ -1399,6 +1399,10 @@ static int tagged_addr_ctrl_set(struct task_struct *target, const struct
 	int ret;
 	long ctrl;
 
+	ctrl = get_tagged_addr_ctrl(target);
+	if (WARN_ON_ONCE(IS_ERR_VALUE(ctrl)))
+		return ctrl;
+
 	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &ctrl, 0, -1);
 	if (ret)
 		return ret;

arch/arm64/kvm/arm.c

@@ -900,7 +900,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu)
 
 	if (run->exit_reason == KVM_EXIT_MMIO) {
 		ret = kvm_handle_mmio_return(vcpu);
-		if (ret)
+		if (ret <= 0)
 			return ret;
 	}
 

arch/arm64/kvm/mmio.c

@@ -72,6 +72,31 @@ unsigned long kvm_mmio_read_buf(const void *buf, unsigned int len)
 	return data;
 }
 
+static bool kvm_pending_sync_exception(struct kvm_vcpu *vcpu)
+{
+	if (!vcpu_get_flag(vcpu, PENDING_EXCEPTION))
+		return false;
+
+	if (vcpu_el1_is_32bit(vcpu)) {
+		switch (vcpu_get_flag(vcpu, EXCEPT_MASK)) {
+		case unpack_vcpu_flag(EXCEPT_AA32_UND):
+		case unpack_vcpu_flag(EXCEPT_AA32_IABT):
+		case unpack_vcpu_flag(EXCEPT_AA32_DABT):
+			return true;
+		default:
+			return false;
+		}
+	} else {
+		switch (vcpu_get_flag(vcpu, EXCEPT_MASK)) {
+		case unpack_vcpu_flag(EXCEPT_AA64_EL1_SYNC):
+		case unpack_vcpu_flag(EXCEPT_AA64_EL2_SYNC):
+			return true;
+		default:
+			return false;
+		}
+	}
+}
+
 /**
  * kvm_handle_mmio_return -- Handle MMIO loads after user space emulation
  *			     or in-kernel IO emulation
@@ -84,9 +109,12 @@ int kvm_handle_mmio_return(struct kvm_vcpu *vcpu)
 	unsigned int len;
 	int mask;
 
-	/* Detect an already handled MMIO return */
-	if (unlikely(!vcpu->mmio_needed))
-		return 0;
+	/*
+	 * Detect if the MMIO return was already handled or if userspace aborted
+	 * the MMIO access.
+	 */
+	if (unlikely(!vcpu->mmio_needed || kvm_pending_sync_exception(vcpu)))
+		return 1;
 
 	vcpu->mmio_needed = 0;
 
@@ -117,7 +145,7 @@ int kvm_handle_mmio_return(struct kvm_vcpu *vcpu)
 	 */
 	kvm_incr_pc(vcpu);
 
-	return 0;
+	return 1;
 }
 
 int io_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa)

arch/arm64/mm/context.c

@@ -32,9 +32,9 @@ static unsigned long nr_pinned_asids;
 static unsigned long *pinned_asid_map;
 
 #define ASID_MASK		(~GENMASK(asid_bits - 1, 0))
-#define ASID_FIRST_VERSION	(1UL << asid_bits)
+#define ASID_FIRST_VERSION	(1UL << 16)
 
-#define NUM_USER_ASIDS		ASID_FIRST_VERSION
+#define NUM_USER_ASIDS		(1UL << asid_bits)
 #define ctxid2asid(asid)	((asid) & ~ASID_MASK)
 #define asid2ctxid(asid, genid)	((asid) | (genid))
 

arch/loongarch/include/asm/hugetlb.h

@@ -29,6 +29,16 @@ static inline int prepare_hugepage_range(struct file *file,
 	return 0;
 }
 
+#define __HAVE_ARCH_HUGE_PTE_CLEAR
+static inline void huge_pte_clear(struct mm_struct *mm, unsigned long addr,
+				  pte_t *ptep, unsigned long sz)
+{
+	pte_t clear;
+
+	pte_val(clear) = (unsigned long)invalid_pte_table;
+	set_pte_at(mm, addr, ptep, clear);
+}
+
 #define __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR
 static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
 					    unsigned long addr, pte_t *ptep)

arch/loongarch/mm/tlb.c

@@ -292,7 +292,7 @@ static void setup_tlb_handler(int cpu)
 		/* Avoid lockdep warning */
 		rcu_cpu_starting(cpu);
 
-#ifdef CONFIG_NUMA
+#if defined(CONFIG_NUMA) && !defined(CONFIG_PREEMPT_RT)
 		vec_sz = sizeof(exception_handlers);
 
 		if (pcpu_handlers[cpu])