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Commit 6a7ed405 authored by Konrad Rzeszutek Wilk's avatar Konrad Rzeszutek Wilk
Browse files

Merge branch 'arm-privcmd-for-3.8' of git://xenbits.xen.org/people/ianc/linux... 

Merge branch 'arm-privcmd-for-3.8' of git://xenbits.xen.org/people/ianc/linux into stable/for-linus-3.8

* 'arm-privcmd-for-3.8' of git://xenbits.xen.org/people/ianc/linux

:
  xen: arm: implement remap interfaces needed for privcmd mappings.
  xen: correctly use xen_pfn_t in remap_domain_mfn_range.
  xen: arm: enable balloon driver
  xen: balloon: allow PVMMU interfaces to be compiled out
  xen: privcmd: support autotranslated physmap guests.
  xen: add pages parameter to xen_remap_domain_mfn_range

Signed-off-by: default avatarKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
parents a7be94ac f832da06

arch/arm/include/asm/xen/interface.h

+1 −0
Original line number Diff line number Diff line
@@ -49,6 +49,7 @@ DEFINE_GUEST_HANDLE(void); 
DEFINE_GUEST_HANDLE(uint64_t);

DEFINE_GUEST_HANDLE(uint32_t);

DEFINE_GUEST_HANDLE(xen_pfn_t);

DEFINE_GUEST_HANDLE(xen_ulong_t);



/* Maximum number of virtual CPUs in multi-processor guests. */

#define MAX_VIRT_CPUS 1

arch/arm/xen/enlighten.c

+102 −21
Original line number Diff line number Diff line
@@ -8,6 +8,8 @@ 
#include <xen/features.h>

#include <xen/platform_pci.h>

#include <xen/xenbus.h>

#include <xen/page.h>

#include <xen/xen-ops.h>

#include <asm/xen/hypervisor.h>

#include <asm/xen/hypercall.h>

#include <linux/interrupt.h>
@@ -17,6 +19,8 @@ 
#include <linux/of_irq.h>

#include <linux/of_address.h>



#include <linux/mm.h>



struct start_info _xen_start_info;

struct start_info *xen_start_info = &_xen_start_info;

EXPORT_SYMBOL_GPL(xen_start_info);
@@ -29,6 +33,10 @@ struct shared_info *HYPERVISOR_shared_info = (void *)&xen_dummy_shared_info; 


DEFINE_PER_CPU(struct vcpu_info *, xen_vcpu);



/* These are unused until we support booting "pre-ballooned" */

unsigned long xen_released_pages;

struct xen_memory_region xen_extra_mem[XEN_EXTRA_MEM_MAX_REGIONS] __initdata;



/* TODO: to be removed */

__read_mostly int xen_have_vector_callback;

EXPORT_SYMBOL_GPL(xen_have_vector_callback);
@@ -38,15 +46,106 @@ EXPORT_SYMBOL_GPL(xen_platform_pci_unplug); 


static __read_mostly int xen_events_irq = -1;



/* map fgmfn of domid to lpfn in the current domain */

static int map_foreign_page(unsigned long lpfn, unsigned long fgmfn,

			    unsigned int domid)

{

	int rc;

	struct xen_add_to_physmap_range xatp = {

		.domid = DOMID_SELF,

		.foreign_domid = domid,

		.size = 1,

		.space = XENMAPSPACE_gmfn_foreign,

	};

	xen_ulong_t idx = fgmfn;

	xen_pfn_t gpfn = lpfn;



	set_xen_guest_handle(xatp.idxs, &idx);

	set_xen_guest_handle(xatp.gpfns, &gpfn);



	rc = HYPERVISOR_memory_op(XENMEM_add_to_physmap_range, &xatp);

	if (rc) {

		pr_warn("Failed to map pfn to mfn rc:%d pfn:%lx mfn:%lx\n",

			rc, lpfn, fgmfn);

		return 1;

	}

	return 0;

}



struct remap_data {

	xen_pfn_t fgmfn; /* foreign domain's gmfn */

	pgprot_t prot;

	domid_t  domid;

	struct vm_area_struct *vma;

	int index;

	struct page **pages;

	struct xen_remap_mfn_info *info;

};



static int remap_pte_fn(pte_t *ptep, pgtable_t token, unsigned long addr,

			void *data)

{

	struct remap_data *info = data;

	struct page *page = info->pages[info->index++];

	unsigned long pfn = page_to_pfn(page);

	pte_t pte = pfn_pte(pfn, info->prot);



	if (map_foreign_page(pfn, info->fgmfn, info->domid))

		return -EFAULT;

	set_pte_at(info->vma->vm_mm, addr, ptep, pte);



	return 0;

}



int xen_remap_domain_mfn_range(struct vm_area_struct *vma,

			       unsigned long addr,

			       unsigned long mfn, int nr,

			       pgprot_t prot, unsigned domid)

			       xen_pfn_t mfn, int nr,

			       pgprot_t prot, unsigned domid,

			       struct page **pages)

{

	return -ENOSYS;

	int err;

	struct remap_data data;



	/* TBD: Batching, current sole caller only does page at a time */

	if (nr > 1)

		return -EINVAL;



	data.fgmfn = mfn;

	data.prot = prot;

	data.domid = domid;

	data.vma = vma;

	data.index = 0;

	data.pages = pages;

	err = apply_to_page_range(vma->vm_mm, addr, nr << PAGE_SHIFT,

				  remap_pte_fn, &data);

	return err;

}

EXPORT_SYMBOL_GPL(xen_remap_domain_mfn_range);



int xen_unmap_domain_mfn_range(struct vm_area_struct *vma,

			       int nr, struct page **pages)

{

	int i;



	for (i = 0; i < nr; i++) {

		struct xen_remove_from_physmap xrp;

		unsigned long rc, pfn;



		pfn = page_to_pfn(pages[i]);



		xrp.domid = DOMID_SELF;

		xrp.gpfn = pfn;

		rc = HYPERVISOR_memory_op(XENMEM_remove_from_physmap, &xrp);

		if (rc) {

			pr_warn("Failed to unmap pfn:%lx rc:%ld\n",

				pfn, rc);

			return rc;

		}

	}

	return 0;

}

EXPORT_SYMBOL_GPL(xen_unmap_domain_mfn_range);



/*

 * see Documentation/devicetree/bindings/arm/xen.txt for the

 * documentation of the Xen Device Tree format.
@@ -148,21 +247,3 @@ static int __init xen_init_events(void) 
	return 0;

}

postcore_initcall(xen_init_events);
 


/* XXX: only until balloon is properly working */

int alloc_xenballooned_pages(int nr_pages, struct page **pages, bool highmem)

{

	*pages = alloc_pages(highmem ? GFP_HIGHUSER : GFP_KERNEL,

			get_order(nr_pages));

	if (*pages == NULL)

		return -ENOMEM;

	return 0;

}

EXPORT_SYMBOL_GPL(alloc_xenballooned_pages);



void free_xenballooned_pages(int nr_pages, struct page **pages)

{

	kfree(*pages);

	*pages = NULL;

}

EXPORT_SYMBOL_GPL(free_xenballooned_pages);

arch/x86/include/asm/xen/interface.h

+1 −0
Original line number Diff line number Diff line
@@ -63,6 +63,7 @@ DEFINE_GUEST_HANDLE(void); 
DEFINE_GUEST_HANDLE(uint64_t);

DEFINE_GUEST_HANDLE(uint32_t);

DEFINE_GUEST_HANDLE(xen_pfn_t);

DEFINE_GUEST_HANDLE(xen_ulong_t);

#endif



#ifndef HYPERVISOR_VIRT_START

arch/x86/xen/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -6,6 +6,7 @@ config XEN 
	bool "Xen guest support"

	select PARAVIRT

	select PARAVIRT_CLOCK

	select XEN_HAVE_PVMMU

	depends on X86_64 || (X86_32 && X86_PAE && !X86_VISWS)

	depends on X86_CMPXCHG && X86_TSC

	help

arch/x86/xen/mmu.c

+15 −2
Original line number Diff line number Diff line
@@ -2478,8 +2478,10 @@ static int remap_area_mfn_pte_fn(pte_t *ptep, pgtable_t token, 


int xen_remap_domain_mfn_range(struct vm_area_struct *vma,

			       unsigned long addr,

			       unsigned long mfn, int nr,

			       pgprot_t prot, unsigned domid)

			       xen_pfn_t mfn, int nr,

			       pgprot_t prot, unsigned domid,

			       struct page **pages)



{

	struct remap_data rmd;

	struct mmu_update mmu_update[REMAP_BATCH_SIZE];
@@ -2523,3 +2525,14 @@ int xen_remap_domain_mfn_range(struct vm_area_struct *vma, 
	return err;

}

EXPORT_SYMBOL_GPL(xen_remap_domain_mfn_range);



/* Returns: 0 success */

int xen_unmap_domain_mfn_range(struct vm_area_struct *vma,

			       int numpgs, struct page **pages)

{

	if (!pages || !xen_feature(XENFEAT_auto_translated_physmap))

		return 0;



	return -EINVAL;

}

EXPORT_SYMBOL_GPL(xen_unmap_domain_mfn_range);