Merge tag 'kvm-riscv-fixes-6.17-1' of https://github.com/kvm-riscv/linux into HEAD

KVM/riscv fixes for 6.17, take #1

- Fix pte settings within kvm_riscv_gstage_ioremap()
- Fix comments in kvm_riscv_check_vcpu_requests()
- Fix stack overrun when setting vlenb via ONE_REG

Author: bonzini

arch/riscv/kvm/mmu.c

@@ -39,6 +39,7 @@ int kvm_riscv_mmu_ioremap(struct kvm *kvm, gpa_t gpa, phys_addr_t hpa,
 			  unsigned long size, bool writable, bool in_atomic)
 {
 	int ret = 0;
+	pgprot_t prot;
 	unsigned long pfn;
 	phys_addr_t addr, end;
 	struct kvm_mmu_memory_cache pcache = {
@@ -55,10 +56,12 @@ int kvm_riscv_mmu_ioremap(struct kvm *kvm, gpa_t gpa, phys_addr_t hpa,
 
 	end = (gpa + size + PAGE_SIZE - 1) & PAGE_MASK;
 	pfn = __phys_to_pfn(hpa);
+	prot = pgprot_noncached(PAGE_WRITE);
 
 	for (addr = gpa; addr < end; addr += PAGE_SIZE) {
 		map.addr = addr;
-		map.pte = pfn_pte(pfn, PAGE_KERNEL_IO);
+		map.pte = pfn_pte(pfn, prot);
+		map.pte = pte_mkdirty(map.pte);
 		map.level = 0;
 
 		if (!writable)

arch/riscv/kvm/vcpu.c

@@ -683,7 +683,7 @@ void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
 }
 
 /**
- * check_vcpu_requests - check and handle pending vCPU requests
+ * kvm_riscv_check_vcpu_requests - check and handle pending vCPU requests
  * @vcpu:	the VCPU pointer
  *
  * Return: 1 if we should enter the guest

arch/riscv/kvm/vcpu_vector.c

@@ -182,6 +182,8 @@ int kvm_riscv_vcpu_set_reg_vector(struct kvm_vcpu *vcpu,
 		struct kvm_cpu_context *cntx = &vcpu->arch.guest_context;
 		unsigned long reg_val;
 
+		if (reg_size != sizeof(reg_val))
+			return -EINVAL;
 		if (copy_from_user(&reg_val, uaddr, reg_size))
 			return -EFAULT;
 		if (reg_val != cntx->vector.vlenb)