Merge tag 'powerpc-5.6-5' of git://git.kernel.org/pub/scm/linux/kerne…

…l/git/powerpc/linux

Pull powerpc fixes from Michael Ellerman:
 "Two fixes for bugs introduced this cycle:

   - fix a crash when shutting down a KVM PR guest (our original style
     of KVM which doesn't use hypervisor mode)

   - fix for the recently added 32-bit KASAN_VMALLOC support

  Thanks to: Christophe Leroy, Greg Kurz, Sean Christopherson"

* tag 'powerpc-5.6-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  KVM: PPC: Fix kernel crash with PR KVM
  powerpc/kasan: Fix shadow memory protection with CONFIG_KASAN_VMALLOC

arch/powerpc/kvm/book3s_pr.c

@@ -1817,6 +1817,7 @@ static void kvmppc_core_vcpu_free_pr(struct kvm_vcpu *vcpu)
 {
 	struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
 
+	kvmppc_mmu_destroy_pr(vcpu);
 	free_page((unsigned long)vcpu->arch.shared & PAGE_MASK);
 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
 	kfree(vcpu->arch.shadow_vcpu);

arch/powerpc/kvm/powerpc.c

@@ -759,7 +759,6 @@ int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu)
 	return 0;
 
 out_vcpu_uninit:
-	kvmppc_mmu_destroy(vcpu);
 	kvmppc_subarch_vcpu_uninit(vcpu);
 	return err;
 }
@@ -792,7 +791,6 @@ void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
 
 	kvmppc_core_vcpu_free(vcpu);
 
-	kvmppc_mmu_destroy(vcpu);
 	kvmppc_subarch_vcpu_uninit(vcpu);
 }
 

arch/powerpc/mm/kasan/kasan_init_32.c

@@ -120,12 +120,6 @@ static void __init kasan_unmap_early_shadow_vmalloc(void)
 	unsigned long k_cur;
 	phys_addr_t pa = __pa(kasan_early_shadow_page);
 
-	if (!early_mmu_has_feature(MMU_FTR_HPTE_TABLE)) {
-		int ret = kasan_init_shadow_page_tables(k_start, k_end);
-
-		if (ret)
-			panic("kasan: kasan_init_shadow_page_tables() failed");
-	}
 	for (k_cur = k_start & PAGE_MASK; k_cur < k_end; k_cur += PAGE_SIZE) {
 		pmd_t *pmd = pmd_offset(pud_offset(pgd_offset_k(k_cur), k_cur), k_cur);
 		pte_t *ptep = pte_offset_kernel(pmd, k_cur);
@@ -143,7 +137,8 @@ void __init kasan_mmu_init(void)
 	int ret;
 	struct memblock_region *reg;
 
-	if (early_mmu_has_feature(MMU_FTR_HPTE_TABLE)) {
+	if (early_mmu_has_feature(MMU_FTR_HPTE_TABLE) ||
+	    IS_ENABLED(CONFIG_KASAN_VMALLOC)) {
 		ret = kasan_init_shadow_page_tables(KASAN_SHADOW_START, KASAN_SHADOW_END);
 
 		if (ret)