diff options
| -rw-r--r-- | arch/x86/xen/grant-table.c | 62 | ||||
| -rw-r--r-- | drivers/xen/gntdev.c | 2 | ||||
| -rw-r--r-- | drivers/xen/grant-table.c | 9 |
3 files changed, 68 insertions, 5 deletions
diff --git a/arch/x86/xen/grant-table.c b/arch/x86/xen/grant-table.c index 3a5f55d51907..2d719799fd6a 100644 --- a/arch/x86/xen/grant-table.c +++ b/arch/x86/xen/grant-table.c @@ -125,3 +125,65 @@ void arch_gnttab_unmap(void *shared, unsigned long nr_gframes) apply_to_page_range(&init_mm, (unsigned long)shared, PAGE_SIZE * nr_gframes, unmap_pte_fn, NULL); } +#ifdef CONFIG_XEN_PVH +#include <xen/balloon.h> +#include <xen/events.h> +#include <linux/slab.h> +static int __init xlated_setup_gnttab_pages(void) +{ + struct page **pages; + xen_pfn_t *pfns; + int rc; + unsigned int i; + unsigned long nr_grant_frames = gnttab_max_grant_frames(); + + BUG_ON(nr_grant_frames == 0); + pages = kcalloc(nr_grant_frames, sizeof(pages[0]), GFP_KERNEL); + if (!pages) + return -ENOMEM; + + pfns = kcalloc(nr_grant_frames, sizeof(pfns[0]), GFP_KERNEL); + if (!pfns) { + kfree(pages); + return -ENOMEM; + } + rc = alloc_xenballooned_pages(nr_grant_frames, pages, 0 /* lowmem */); + if (rc) { + pr_warn("%s Couldn't balloon alloc %ld pfns rc:%d\n", __func__, + nr_grant_frames, rc); + kfree(pages); + kfree(pfns); + return rc; + } + for (i = 0; i < nr_grant_frames; i++) + pfns[i] = page_to_pfn(pages[i]); + + rc = arch_gnttab_map_shared(pfns, nr_grant_frames, nr_grant_frames, + &xen_auto_xlat_grant_frames.vaddr); + + kfree(pages); + if (rc) { + pr_warn("%s Couldn't map %ld pfns rc:%d\n", __func__, + nr_grant_frames, rc); + free_xenballooned_pages(nr_grant_frames, pages); + kfree(pfns); + return rc; + } + + xen_auto_xlat_grant_frames.pfn = pfns; + xen_auto_xlat_grant_frames.count = nr_grant_frames; + + return 0; +} + +static int __init xen_pvh_gnttab_setup(void) +{ + if (!xen_pvh_domain()) + return -ENODEV; + + return xlated_setup_gnttab_pages(); +} +/* Call it _before_ __gnttab_init as we need to initialize the + * xen_auto_xlat_grant_frames first. */ +core_initcall(xen_pvh_gnttab_setup); +#endif diff --git a/drivers/xen/gntdev.c b/drivers/xen/gntdev.c index e41c79c986ea..073b4a19a8b0 100644 --- a/drivers/xen/gntdev.c +++ b/drivers/xen/gntdev.c @@ -846,7 +846,7 @@ static int __init gntdev_init(void) if (!xen_domain()) return -ENODEV; - use_ptemod = xen_pv_domain(); + use_ptemod = !xen_feature(XENFEAT_auto_translated_physmap); err = misc_register(&gntdev_miscdev); if (err != 0) { diff --git a/drivers/xen/grant-table.c b/drivers/xen/grant-table.c index 44b75ccfbbff..1d5fbce4acb7 100644 --- a/drivers/xen/grant-table.c +++ b/drivers/xen/grant-table.c @@ -1108,7 +1108,7 @@ static int gnttab_map(unsigned int start_idx, unsigned int end_idx) unsigned int nr_gframes = end_idx + 1; int rc; - if (xen_hvm_domain()) { + if (xen_feature(XENFEAT_auto_translated_physmap)) { struct xen_add_to_physmap xatp; unsigned int i = end_idx; rc = 0; @@ -1184,7 +1184,7 @@ static void gnttab_request_version(void) int rc; struct gnttab_set_version gsv; - if (xen_hvm_domain()) + if (xen_feature(XENFEAT_auto_translated_physmap)) gsv.version = 1; else gsv.version = 2; @@ -1327,5 +1327,6 @@ static int __gnttab_init(void) return gnttab_init(); } - -core_initcall(__gnttab_init); +/* Starts after core_initcall so that xen_pvh_gnttab_setup can be called + * beforehand to initialize xen_auto_xlat_grant_frames. */ +core_initcall_sync(__gnttab_init); |