mirror of https://gitee.com/openkylin/linux.git
KVM: PPC: cache flush for kernel managed pages
Kernel can only access pages which maps as memory. So flush only the valid kernel pages. Signed-off-by: Bharat Bhushan <bharat.bhushan@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de>
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@ -282,8 +282,15 @@ void kvmppc_init_lpid(unsigned long nr_lpids);
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static inline void kvmppc_mmu_flush_icache(pfn_t pfn)
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{
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/* Clear i-cache for new pages */
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struct page *page;
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/*
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* We can only access pages that the kernel maps
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* as memory. Bail out for unmapped ones.
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*/
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if (!pfn_valid(pfn))
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return;
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/* Clear i-cache for new pages */
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page = pfn_to_page(pfn);
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if (!test_bit(PG_arch_1, &page->flags)) {
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flush_dcache_icache_page(page);
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