From: Bharat Bhushan <[email protected]> Kernel can only access pages which maps as memory. So flush only the valid kernel pages.
Signed-off-by: Bharat Bhushan <[email protected]> --- v1->v2 - move pfn_valid() check in kvmppc_mmu_flush_icache - Added comment to describe why this is needed arch/powerpc/include/asm/kvm_ppc.h | 9 ++++++++- 1 files changed, 8 insertions(+), 1 deletions(-) diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h index f589307..4794de6 100644 --- a/arch/powerpc/include/asm/kvm_ppc.h +++ b/arch/powerpc/include/asm/kvm_ppc.h @@ -282,8 +282,15 @@ void kvmppc_init_lpid(unsigned long nr_lpids); static inline void kvmppc_mmu_flush_icache(pfn_t pfn) { - /* Clear i-cache for new pages */ struct page *page; + /* + * We can only access pages that the kernel maps + * as memory. Bail out for unmapped ones. + */ + if (!pfn_valid(pfn)) + return; + + /* Clear i-cache for new pages */ page = pfn_to_page(pfn); if (!test_bit(PG_arch_1, &page->flags)) { flush_dcache_icache_page(page); -- 1.7.0.4 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
