KVM: PPC: Replace SPAPR_TCE_SHIFT with IOMMU_PAGE_SHIFT_4K

SPAPR_TCE_SHIFT is used in few places only and since IOMMU_PAGE_SHIFT_4K
can be easily used instead, remove SPAPR_TCE_SHIFT.

Signed-off-by: Alexey Kardashevskiy <[e-mail]>
Reviewed-by: David Gibson <[e-mail]>
Signed-off-by: Paul Mackerras <[e-mail]>

arch/powerpc/include/asm/kvm_book3s_64.h

···
 }
 #endif
 
-#define SPAPR_TCE_SHIFT		12
-
 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 #define KVM_DEFAULT_HPT_ORDER	24	/* 16MB HPT by default */
 #endif

arch/powerpc/kvm/book3s_64_vio.c

···
 #include <asm/ppc-opcode.h>
 #include <asm/kvm_host.h>
 #include <asm/udbg.h>
+#include <asm/iommu.h>
 
 #define TCES_PER_PAGE	(PAGE_SIZE / sizeof(u64))
 
 static unsigned long kvmppc_tce_pages(unsigned long window_size)
 {
-	return ALIGN((window_size >> SPAPR_TCE_SHIFT)
+	return ALIGN((window_size >> IOMMU_PAGE_SHIFT_4K)
 		     * sizeof(u64), PAGE_SIZE) / PAGE_SIZE;
 }
 

arch/powerpc/kvm/book3s_64_vio_hv.c

···
 	if (ret != H_SUCCESS)
 		return ret;
 
-	idx = ioba >> SPAPR_TCE_SHIFT;
+	idx = ioba >> IOMMU_PAGE_SHIFT_4K;
 	page = stt->pages[idx / TCES_PER_PAGE];
 	tbl = (u64 *)page_address(page);
 
···
 	if (ret != H_SUCCESS)
 		return ret;
 
-	idx = ioba >> SPAPR_TCE_SHIFT;
+	idx = ioba >> IOMMU_PAGE_SHIFT_4K;
 	page = stt->pages[idx / TCES_PER_PAGE];
 	tbl = (u64 *)page_address(page);