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Commit d52d53b8 authored by Yinghai Lu's avatar Yinghai Lu Committed by Ingo Molnar
Browse files

RFC x86: try to remove arch_get_ram_range 



want to remove arch_get_ram_range, and use early_node_map instead.

Signed-off-by: default avatarYinghai Lu <yhlu.kernel@gmail.com>

Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 1ea598c2

arch/x86/mm/init_32.c

+4 −2
Original line number Diff line number Diff line
@@ -298,7 +298,7 @@ struct add_highpages_data { 
	unsigned long end_pfn;

};



static void __init add_highpages_work_fn(unsigned long start_pfn,

static int __init add_highpages_work_fn(unsigned long start_pfn,

					 unsigned long end_pfn, void *datax)

{

	int node_pfn;
@@ -311,7 +311,7 @@ static void __init add_highpages_work_fn(unsigned long start_pfn, 
	final_start_pfn = max(start_pfn, data->start_pfn);

	final_end_pfn = min(end_pfn, data->end_pfn);

	if (final_start_pfn >= final_end_pfn)

		return;

		return 0;



	for (node_pfn = final_start_pfn; node_pfn < final_end_pfn;

	     node_pfn++) {
@@ -321,6 +321,8 @@ static void __init add_highpages_work_fn(unsigned long start_pfn, 
		add_one_highpage_init(page, node_pfn);

	}



	return 0;



}



void __init add_highpages_with_active_regions(int nid, unsigned long start_pfn,

drivers/pci/intel-iommu.c

+37 −14
Original line number Diff line number Diff line
@@ -1637,12 +1637,43 @@ static inline int iommu_prepare_rmrr_dev(struct dmar_rmrr_unit *rmrr, 
}



#ifdef CONFIG_DMAR_GFX_WA

extern int arch_get_ram_range(int slot, u64 *addr, u64 *size);

struct iommu_prepare_data {

	struct pci_dev *pdev;

	int ret;

};



static int __init iommu_prepare_work_fn(unsigned long start_pfn,

					 unsigned long end_pfn, void *datax)

{

	struct iommu_prepare_data *data;



	data = (struct iommu_prepare_data *)datax;



	data->ret = iommu_prepare_identity_map(data->pdev,

				start_pfn<<PAGE_SHIFT, end_pfn<<PAGE_SHIFT);

	return data->ret;



}



static int __init iommu_prepare_with_active_regions(struct pci_dev *pdev)

{

	int nid;

	struct iommu_prepare_data data;



	data.pdev = pdev;

	data.ret = 0;



	for_each_online_node(nid) {

		work_with_active_regions(nid, iommu_prepare_work_fn, &data);

		if (data.ret)

			return data.ret;

	}

	return data.ret;

}



static void __init iommu_prepare_gfx_mapping(void)

{

	struct pci_dev *pdev = NULL;

	u64 base, size;

	int slot;

	int ret;



	for_each_pci_dev(pdev) {
@@ -1651,16 +1682,8 @@ static void __init iommu_prepare_gfx_mapping(void) 
			continue;

		printk(KERN_INFO "IOMMU: gfx device %s 1-1 mapping\n",

			pci_name(pdev));

		slot = arch_get_ram_range(0, &base, &size);

		while (slot >= 0) {

			ret = iommu_prepare_identity_map(pdev,

					base, base + size);

		ret = iommu_prepare_with_active_regions(pdev);

		if (ret)

				goto error;

			slot = arch_get_ram_range(slot, &base, &size);

		}

		continue;

error:

			printk(KERN_ERR "IOMMU: mapping reserved region failed\n");

	}

}

include/linux/mm.h

+1 −1
Original line number Diff line number Diff line
@@ -1011,7 +1011,7 @@ extern unsigned long find_min_pfn_with_active_regions(void); 
extern unsigned long find_max_pfn_with_active_regions(void);

extern void free_bootmem_with_active_regions(int nid,

						unsigned long max_low_pfn);

typedef void (*work_fn_t)(unsigned long, unsigned long, void *);

typedef int (*work_fn_t)(unsigned long, unsigned long, void *);

extern void work_with_active_regions(int nid, work_fn_t work_fn, void *data);

extern void sparse_memory_present_with_active_regions(int nid);

#ifndef CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID

mm/page_alloc.c

+7 −3
Original line number Diff line number Diff line
@@ -2932,10 +2932,14 @@ void __init free_bootmem_with_active_regions(int nid, 
void __init work_with_active_regions(int nid, work_fn_t work_fn, void *data)

{

	int i;

	int ret;



	for_each_active_range_index_in_nid(i, nid)

		work_fn(early_node_map[i].start_pfn, early_node_map[i].end_pfn,

			data);

	for_each_active_range_index_in_nid(i, nid) {

		ret = work_fn(early_node_map[i].start_pfn,

			      early_node_map[i].end_pfn, data);

		if (ret)

			break;

	}

}

/**

 * sparse_memory_present_with_active_regions - Call memory_present for each active range