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Commit 9cf6b756 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux 

Pull arm64 fixes from Will Deacon:
 "Hot on the heels of our last set of fixes are a few more for -rc7.

  Two of them are fixing issues with our virtual interrupt controller
  implementation in KVM/arm, while the other is a longstanding but
  straightforward kallsyms fix which was been acked by Masami and
  resolves an initialisation failure in kprobes observed on arm64.

   - Fix GICv2 emulation bug (KVM)

   - Fix deadlock in virtual GIC interrupt injection code (KVM)

   - Fix kprobes blacklist init failure due to broken kallsyms lookup"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  KVM: arm/arm64: vgic-v2: Handle SGI bits in GICD_I{S,C}PENDR0 as WI
  KVM: arm/arm64: vgic: Fix potential deadlock when ap_list is long
  kallsyms: Don't let kallsyms_lookup_size_offset() fail on retrieving the first symbol
parents 9e8312f5 82e40f55

kernel/kallsyms.c

+4 −2
Original line number Diff line number Diff line
@@ -263,8 +263,10 @@ int kallsyms_lookup_size_offset(unsigned long addr, unsigned long *symbolsize, 
{

	char namebuf[KSYM_NAME_LEN];



	if (is_ksym_addr(addr))

		return !!get_symbol_pos(addr, symbolsize, offset);

	if (is_ksym_addr(addr)) {

		get_symbol_pos(addr, symbolsize, offset);

		return 1;

	}

	return !!module_address_lookup(addr, symbolsize, offset, NULL, namebuf) ||

	       !!__bpf_address_lookup(addr, symbolsize, offset, namebuf);

}

virt/kvm/arm/vgic/vgic-mmio.c

+18 −0
Original line number Diff line number Diff line
@@ -211,6 +211,12 @@ static void vgic_hw_irq_spending(struct kvm_vcpu *vcpu, struct vgic_irq *irq, 
	vgic_irq_set_phys_active(irq, true);

}



static bool is_vgic_v2_sgi(struct kvm_vcpu *vcpu, struct vgic_irq *irq)

{

	return (vgic_irq_is_sgi(irq->intid) &&

		vcpu->kvm->arch.vgic.vgic_model == KVM_DEV_TYPE_ARM_VGIC_V2);

}



void vgic_mmio_write_spending(struct kvm_vcpu *vcpu,

			      gpa_t addr, unsigned int len,

			      unsigned long val)
@@ -223,6 +229,12 @@ void vgic_mmio_write_spending(struct kvm_vcpu *vcpu, 
	for_each_set_bit(i, &val, len * 8) {

		struct vgic_irq *irq = vgic_get_irq(vcpu->kvm, vcpu, intid + i);



		/* GICD_ISPENDR0 SGI bits are WI */

		if (is_vgic_v2_sgi(vcpu, irq)) {

			vgic_put_irq(vcpu->kvm, irq);

			continue;

		}



		raw_spin_lock_irqsave(&irq->irq_lock, flags);

		if (irq->hw)

			vgic_hw_irq_spending(vcpu, irq, is_uaccess);
@@ -270,6 +282,12 @@ void vgic_mmio_write_cpending(struct kvm_vcpu *vcpu, 
	for_each_set_bit(i, &val, len * 8) {

		struct vgic_irq *irq = vgic_get_irq(vcpu->kvm, vcpu, intid + i);



		/* GICD_ICPENDR0 SGI bits are WI */

		if (is_vgic_v2_sgi(vcpu, irq)) {

			vgic_put_irq(vcpu->kvm, irq);

			continue;

		}



		raw_spin_lock_irqsave(&irq->irq_lock, flags);



		if (irq->hw)

virt/kvm/arm/vgic/vgic-v2.c

+4 −1
Original line number Diff line number Diff line
@@ -184,7 +184,10 @@ void vgic_v2_populate_lr(struct kvm_vcpu *vcpu, struct vgic_irq *irq, int lr) 
		if (vgic_irq_is_sgi(irq->intid)) {

			u32 src = ffs(irq->source);



			BUG_ON(!src);

			if (WARN_RATELIMIT(!src, "No SGI source for INTID %d\n",

					   irq->intid))

				return;



			val |= (src - 1) << GICH_LR_PHYSID_CPUID_SHIFT;

			irq->source &= ~(1 << (src - 1));

			if (irq->source) {

virt/kvm/arm/vgic/vgic-v3.c

+4 −1
Original line number Diff line number Diff line
@@ -167,7 +167,10 @@ void vgic_v3_populate_lr(struct kvm_vcpu *vcpu, struct vgic_irq *irq, int lr) 
		    model == KVM_DEV_TYPE_ARM_VGIC_V2) {

			u32 src = ffs(irq->source);



			BUG_ON(!src);

			if (WARN_RATELIMIT(!src, "No SGI source for INTID %d\n",

					   irq->intid))

				return;



			val |= (src - 1) << GICH_LR_PHYSID_CPUID_SHIFT;

			irq->source &= ~(1 << (src - 1));

			if (irq->source) {

virt/kvm/arm/vgic/vgic.c

+7 −0
Original line number Diff line number Diff line
@@ -254,6 +254,13 @@ static int vgic_irq_cmp(void *priv, struct list_head *a, struct list_head *b) 
	bool penda, pendb;

	int ret;



	/*

	 * list_sort may call this function with the same element when

	 * the list is fairly long.

	 */

	if (unlikely(irqa == irqb))

		return 0;



	raw_spin_lock(&irqa->irq_lock);

	raw_spin_lock_nested(&irqb->irq_lock, SINGLE_DEPTH_NESTING);