mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-25 07:30:53 +07:00
xen: arm: implement remap interfaces needed for privcmd mappings.
We use XENMEM_add_to_physmap_range which is the preferred interface for foreign mappings. Acked-by: Mukesh Rathor <mukesh.rathor@oracle.com> Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
Ian Campbell
parent
7892f6928d
commit
f832da068b
@ -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
|
||||
|
||||
@ -9,6 +9,7 @@
|
||||
#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>
|
||||
@ -18,6 +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);
|
||||
@ -43,15 +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.
|
||||
|
||||
@ -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
|
||||
|
||||
@ -153,6 +153,14 @@ struct xen_machphys_mapping {
|
||||
};
|
||||
DEFINE_GUEST_HANDLE_STRUCT(xen_machphys_mapping_t);
|
||||
|
||||
#define XENMAPSPACE_shared_info 0 /* shared info page */
|
||||
#define XENMAPSPACE_grant_table 1 /* grant table page */
|
||||
#define XENMAPSPACE_gmfn 2 /* GMFN */
|
||||
#define XENMAPSPACE_gmfn_range 3 /* GMFN range, XENMEM_add_to_physmap only. */
|
||||
#define XENMAPSPACE_gmfn_foreign 4 /* GMFN from another dom,
|
||||
* XENMEM_add_to_physmap_range only.
|
||||
*/
|
||||
|
||||
/*
|
||||
* Sets the GPFN at which a particular page appears in the specified guest's
|
||||
* pseudophysical address space.
|
||||
@ -167,8 +175,6 @@ struct xen_add_to_physmap {
|
||||
uint16_t size;
|
||||
|
||||
/* Source mapping space. */
|
||||
#define XENMAPSPACE_shared_info 0 /* shared info page */
|
||||
#define XENMAPSPACE_grant_table 1 /* grant table page */
|
||||
unsigned int space;
|
||||
|
||||
/* Index into source mapping space. */
|
||||
@ -182,6 +188,24 @@ DEFINE_GUEST_HANDLE_STRUCT(xen_add_to_physmap);
|
||||
/*** REMOVED ***/
|
||||
/*#define XENMEM_translate_gpfn_list 8*/
|
||||
|
||||
#define XENMEM_add_to_physmap_range 23
|
||||
struct xen_add_to_physmap_range {
|
||||
/* Which domain to change the mapping for. */
|
||||
domid_t domid;
|
||||
uint16_t space; /* => enum phys_map_space */
|
||||
|
||||
/* Number of pages to go through */
|
||||
uint16_t size;
|
||||
domid_t foreign_domid; /* IFF gmfn_foreign */
|
||||
|
||||
/* Indexes into space being mapped. */
|
||||
GUEST_HANDLE(xen_ulong_t) idxs;
|
||||
|
||||
/* GPFN in domid where the source mapping page should appear. */
|
||||
GUEST_HANDLE(xen_pfn_t) gpfns;
|
||||
};
|
||||
DEFINE_GUEST_HANDLE_STRUCT(xen_add_to_physmap_range);
|
||||
|
||||
/*
|
||||
* Returns the pseudo-physical memory map as it was when the domain
|
||||
* was started (specified by XENMEM_set_memory_map).
|
||||
@ -217,4 +241,20 @@ DEFINE_GUEST_HANDLE_STRUCT(xen_memory_map);
|
||||
* during a driver critical region.
|
||||
*/
|
||||
extern spinlock_t xen_reservation_lock;
|
||||
|
||||
/*
|
||||
* Unmaps the page appearing at a particular GPFN from the specified guest's
|
||||
* pseudophysical address space.
|
||||
* arg == addr of xen_remove_from_physmap_t.
|
||||
*/
|
||||
#define XENMEM_remove_from_physmap 15
|
||||
struct xen_remove_from_physmap {
|
||||
/* Which domain to change the mapping for. */
|
||||
domid_t domid;
|
||||
|
||||
/* GPFN of the current mapping of the page. */
|
||||
xen_pfn_t gpfn;
|
||||
};
|
||||
DEFINE_GUEST_HANDLE_STRUCT(xen_remove_from_physmap);
|
||||
|
||||
#endif /* __XEN_PUBLIC_MEMORY_H__ */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user