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Commit 3d24bbd7 authored by Stefano Stabellini's avatar Stefano Stabellini
Browse files

grant-table: call set_phys_to_machine after mapping grant refs 



When mapping/unmapping grant refs, call
set_phys_to_machine to update the P2M with the new mappings for
autotranslate guests.
This is (almost) a nop on x86.

Signed-off-by: default avatarStefano Stabellini <stefano.stabellini@eu.citrix.com>

Changes in v9:
- add in-code comments.
parent 3d1975b5

drivers/xen/grant-table.c

+17 −2
Original line number Diff line number Diff line
@@ -49,6 +49,7 @@ 
#include <xen/grant_table.h>

#include <xen/interface/memory.h>

#include <xen/hvc-console.h>

#include <xen/swiotlb-xen.h>

#include <asm/xen/hypercall.h>

#include <asm/xen/interface.h>
@@ -898,8 +899,16 @@ int gnttab_map_refs(struct gnttab_map_grant_ref *map_ops, 
			gnttab_retry_eagain_gop(GNTTABOP_map_grant_ref, map_ops + i,

						&map_ops[i].status, __func__);



	if (xen_feature(XENFEAT_auto_translated_physmap))

	/* this is basically a nop on x86 */

	if (xen_feature(XENFEAT_auto_translated_physmap)) {

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

			if (map_ops[i].status)

				continue;

			set_phys_to_machine(map_ops[i].host_addr >> PAGE_SHIFT,

					map_ops[i].dev_bus_addr >> PAGE_SHIFT);

		}

		return ret;

	}



	if (!in_interrupt() && paravirt_get_lazy_mode() == PARAVIRT_LAZY_NONE) {

		arch_enter_lazy_mmu_mode();
@@ -942,8 +951,14 @@ int gnttab_unmap_refs(struct gnttab_unmap_grant_ref *unmap_ops, 
	if (ret)

		return ret;



	if (xen_feature(XENFEAT_auto_translated_physmap))

	/* this is basically a nop on x86 */

	if (xen_feature(XENFEAT_auto_translated_physmap)) {

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

			set_phys_to_machine(unmap_ops[i].host_addr >> PAGE_SHIFT,

					INVALID_P2M_ENTRY);

		}

		return ret;

	}



	if (!in_interrupt() && paravirt_get_lazy_mode() == PARAVIRT_LAZY_NONE) {

		arch_enter_lazy_mmu_mode();