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Commit adccf65c authored by Bharat Bhushan's avatar Bharat Bhushan Committed by Alexander Graf
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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: default avatarBharat Bhushan <bharat.bhushan@freescale.com>
Signed-off-by: default avatarAlexander Graf <agraf@suse.de>
parent 660696d1

arch/powerpc/include/asm/kvm_ppc.h

+8 −1
Original line number Diff line number Diff line
@@ -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);