powerpc fixes for 5.6 #5

Two fixes for bugs introduced this cycle.
 
 One for a crash when shutting down a KVM PR guest (our original style of KVM
 which doesn't use hypervisor mode).
 
 And one fix for the recently added 32-bit KASAN_VMALLOC support.
 
 Thanks to:
   Christophe Leroy, Greg Kurz, Sean Christopherson.
 -----BEGIN PGP SIGNATURE-----
 
 iQJHBAABCAAxFiEEJFGtCPCthwEv2Y/bUevqPMjhpYAFAl51/+oTHG1wZUBlbGxl
 cm1hbi5pZC5hdQAKCRBR6+o8yOGlgLuRD/0fZ4kTt+dyEMt7udP8ocBBNy4uRsNr
 mC6nxxSIQ9XhsD/oJJ+wey8c/+/FUYpqAEg/IlWIZg4xeBks7imESIgbA9JSQFp5
 pAObxc2AiZ97Fr8OuNrGcsakl2nQwX2tge8pNWJWN6Ukh+CsdbN9evpxFDe2u9h2
 acpWFO/KBCm6CD1fd9y94pBQTKRCNGXpMX32SO1dn8UB+ApesUS3YWs209sjETpw
 koKY7ZE9rd2YVNuaQp5fO/C/jdBIh+dzHbmeooNo4BFJAys6RNrxEbWqjwoy8es7
 OhwmtDn3aWo6HvB5SvWKKvSFOvIyXzcnAV6spCkyk0vhTckEY8tEvjgKAhTNP9nA
 Gu7VHx/uEkN+GIW76SyK7XAEUgKwMqfRNbWk8YpI1dNj7zW8Z/3kh/PhKja7lnj6
 C77i6FXu0xkOd1+ZL73JNof98EfdrVl2mZGDvv3bCY+ME9zkYjMUj6uKzZ5+OJvq
 ALJXMvegQM1Ma8mx3Ah5HwcPqUmIhNNHhCFXtzP9Gcrg4dNNGOCzGbyomcAA6gDb
 rzzhe1ErI5HPZ524cMZFHjf0d04X9AOeVk2TyyL0tWgl/gNVaYSHKdaECc2xy3/Q
 Pu8T8CvGBhR2uHb74DLxZPtOUhQYdMU7lvJCq9IKLfRWi5E/rsDAVoVJu46vG3QP
 cIsl2hgW/7eW0g==
 =JOM7
 -----END PGP SIGNATURE-----

Merge tag 'powerpc-5.6-5' of git://git.kernel.org/pub/scm/linux/kernel/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
This commit is contained in:
Linus Torvalds 2020-03-21 08:51:45 -07:00
commit c63c50fc2e
3 changed files with 3 additions and 9 deletions

View File

@ -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);

View File

@ -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);
}

View File

@ -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)