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| author |   Paolo Bonzini <pbonzini@redhat.com> | 2019-06-30 08:36:21 -0400 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2019-07-05 13:48:48 +0200 |
| commit | e9f2a760b158551bfbef6db31d2cae45ab8072e5 (patch) | |
| tree | 290da330d8a559d9f8a3c8119299579c2fc35946 /arch/x86/kvm/mmu.c | |
| parent | KVM: x86: remove now unneeded hugepage gfn adjustment (diff) | |
| download | linux-dev-e9f2a760b158551bfbef6db31d2cae45ab8072e5.tar.xz linux-dev-e9f2a760b158551bfbef6db31d2cae45ab8072e5.zip | |
KVM: x86: change kvm_mmu_page_get_gfn BUG_ON to WARN_ON
Note that in such a case it is quite likely that KVM will BUG_ON
in __pte_list_remove when the VM is closed. However, there is no
immediate risk of memory corruption in the host so a WARN_ON is
enough and it lets you gather traces for debugging.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/mmu.c')
| -rw-r--r-- | arch/x86/kvm/mmu.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index 084c1a0d9f98..0629a89bb070 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -1098,10 +1098,16 @@ static gfn_t kvm_mmu_page_get_gfn(struct kvm_mmu_page *sp, int index) static void kvm_mmu_page_set_gfn(struct kvm_mmu_page *sp, int index, gfn_t gfn) { - if (sp->role.direct) - BUG_ON(gfn != kvm_mmu_page_get_gfn(sp, index)); - else + if (!sp->role.direct) { sp->gfns[index] = gfn; + return; + } + + if (WARN_ON(gfn != kvm_mmu_page_get_gfn(sp, index))) + pr_err_ratelimited("gfn mismatch under direct page %llx " + "(expected %llx, got %llx)\n", + sp->gfn, + kvm_mmu_page_get_gfn(sp, index), gfn); } /* |