diff options
Diffstat (limited to 'tools/libxc/xc_offline_page.c')
| -rw-r--r-- | tools/libxc/xc_offline_page.c | 185 |
1 files changed, 30 insertions, 155 deletions
diff --git a/tools/libxc/xc_offline_page.c b/tools/libxc/xc_offline_page.c index 1f6dbc6d5e..fbb53f5f0f 100644 --- a/tools/libxc/xc_offline_page.c +++ b/tools/libxc/xc_offline_page.c @@ -33,17 +33,6 @@ #include "xg_private.h" #include "xg_save_restore.h" -struct domain_mem_info{ - int domid; - unsigned int pt_level; - unsigned int guest_width; - xen_pfn_t *pfn_type; - xen_pfn_t *p2m_table; - unsigned long p2m_size; - xen_pfn_t *m2p_table; - int max_mfn; -}; - struct pte_backup_entry { xen_pfn_t table_mfn; @@ -180,139 +169,6 @@ static int xc_is_page_granted_v2(xc_interface *xch, xen_pfn_t gpfn, return (i != gnt_num); } -static xen_pfn_t pfn_to_mfn(xen_pfn_t pfn, xen_pfn_t *p2m, int gwidth) -{ - return ((xen_pfn_t) ((gwidth==8)? - (((uint64_t *)p2m)[(pfn)]): - ((((uint32_t *)p2m)[(pfn)]) == 0xffffffffU ? - (-1UL) : - (((uint32_t *)p2m)[(pfn)])))); -} - -static int get_pt_level(xc_interface *xch, uint32_t domid, - unsigned int *pt_level, - unsigned int *gwidth) -{ - xen_capabilities_info_t xen_caps = ""; - - if (xc_version(xch, XENVER_capabilities, &xen_caps) != 0) - return -1; - - if (xc_domain_get_guest_width(xch, domid, gwidth) != 0) - return -1; - - if (strstr(xen_caps, "xen-3.0-x86_64")) - /* Depends on whether it's a compat 32-on-64 guest */ - *pt_level = ( (*gwidth == 8) ? 4 : 3 ); - else if (strstr(xen_caps, "xen-3.0-x86_32p")) - *pt_level = 3; - else if (strstr(xen_caps, "xen-3.0-x86_32")) - *pt_level = 2; - else - return -1; - - return 0; -} - -static int close_mem_info(xc_interface *xch, struct domain_mem_info *minfo) -{ - if (minfo->pfn_type) - free(minfo->pfn_type); - munmap(minfo->m2p_table, M2P_SIZE(minfo->max_mfn)); - munmap(minfo->p2m_table, P2M_FLL_ENTRIES * PAGE_SIZE); - minfo->p2m_table = minfo->m2p_table = NULL; - - return 0; -} - -static int init_mem_info(xc_interface *xch, int domid, - struct domain_mem_info *minfo, - xc_dominfo_t *info) -{ - uint64_aligned_t shared_info_frame; - shared_info_any_t *live_shinfo = NULL; - int i, rc; - - /* Only be initialized once */ - if (minfo->pfn_type || minfo->m2p_table || minfo->p2m_table) - return -EINVAL; - - if ( get_pt_level(xch, domid, &minfo->pt_level, - &minfo->guest_width) ) - { - ERROR("Unable to get PT level info."); - return -EFAULT; - } - dinfo->guest_width = minfo->guest_width; - - shared_info_frame = info->shared_info_frame; - - live_shinfo = xc_map_foreign_range(xch, domid, - PAGE_SIZE, PROT_READ, shared_info_frame); - if ( !live_shinfo ) - { - ERROR("Couldn't map live_shinfo"); - return -EFAULT; - } - - if ( (rc = xc_core_arch_map_p2m_writable(xch, minfo->guest_width, - info, live_shinfo, &minfo->p2m_table, &minfo->p2m_size)) ) - { - ERROR("Couldn't map p2m table %x\n", rc); - goto failed; - } - munmap(live_shinfo, PAGE_SIZE); - live_shinfo = NULL; - - dinfo->p2m_size = minfo->p2m_size; - - minfo->max_mfn = xc_maximum_ram_page(xch); - if ( !(minfo->m2p_table = - xc_map_m2p(xch, minfo->max_mfn, PROT_READ, NULL)) ) - { - ERROR("Failed to map live M2P table"); - goto failed; - } - - /* Get pfn type */ - minfo->pfn_type = calloc(sizeof(*minfo->pfn_type), minfo->p2m_size); - if (!minfo->pfn_type) - { - ERROR("Failed to malloc pfn_type\n"); - goto failed; - } - - for (i = 0; i < minfo->p2m_size; i++) - minfo->pfn_type[i] = pfn_to_mfn(i, minfo->p2m_table, - minfo->guest_width); - - for (i = 0; i < minfo->p2m_size ; i+=1024) - { - int count = ((dinfo->p2m_size - i ) > 1024 ) ? 1024: (dinfo->p2m_size - i); - if ( ( rc = xc_get_pfn_type_batch(xch, domid, count, - minfo->pfn_type + i)) ) - { - ERROR("Failed to get pfn_type %x\n", rc); - goto failed; - } - } - return 0; - -failed: - if (minfo->pfn_type) - { - free(minfo->pfn_type); - minfo->pfn_type = NULL; - } - if (live_shinfo) - munmap(live_shinfo, PAGE_SIZE); - munmap(minfo->m2p_table, M2P_SIZE(minfo->max_mfn)); - munmap(minfo->p2m_table, P2M_FLL_ENTRIES * PAGE_SIZE); - minfo->p2m_table = minfo->m2p_table = NULL; - - return -1; -} - static int backup_ptes(xen_pfn_t table_mfn, int offset, struct pte_backup *backup) { @@ -402,7 +258,7 @@ static int __update_pte(xc_interface *xch, } static int change_pte(xc_interface *xch, int domid, - struct domain_mem_info *minfo, + struct xc_domain_meminfo *minfo, struct pte_backup *backup, struct xc_mmu *mmu, pte_func func, @@ -412,7 +268,7 @@ static int change_pte(xc_interface *xch, int domid, uint64_t i; void *content = NULL; - pte_num = PAGE_SIZE / ((minfo->pt_level == 2) ? 4 : 8); + pte_num = PAGE_SIZE / ((minfo->pt_levels == 2) ? 4 : 8); for (i = 0; i < minfo->p2m_size; i++) { @@ -435,7 +291,7 @@ static int change_pte(xc_interface *xch, int domid, for (j = 0; j < pte_num; j++) { - if ( minfo->pt_level == 2 ) + if ( minfo->pt_levels == 2 ) pte = ((const uint32_t*)content)[j]; else pte = ((const uint64_t*)content)[j]; @@ -447,7 +303,7 @@ static int change_pte(xc_interface *xch, int domid, case 1: if ( xc_add_mmu_update(xch, mmu, table_mfn << PAGE_SHIFT | - j * ( (minfo->pt_level == 2) ? + j * ( (minfo->pt_levels == 2) ? sizeof(uint32_t): sizeof(uint64_t)) | MMU_PT_UPDATE_PRESERVE_AD, new_pte) ) @@ -480,7 +336,7 @@ failed: } static int update_pte(xc_interface *xch, int domid, - struct domain_mem_info *minfo, + struct xc_domain_meminfo *minfo, struct pte_backup *backup, struct xc_mmu *mmu, unsigned long new_mfn) @@ -490,7 +346,7 @@ static int update_pte(xc_interface *xch, int domid, } static int clear_pte(xc_interface *xch, int domid, - struct domain_mem_info *minfo, + struct xc_domain_meminfo *minfo, struct pte_backup *backup, struct xc_mmu *mmu, xen_pfn_t mfn) @@ -538,7 +394,7 @@ static int is_page_exchangable(xc_interface *xch, int domid, xen_pfn_t mfn, int xc_exchange_page(xc_interface *xch, int domid, xen_pfn_t mfn) { xc_dominfo_t info; - struct domain_mem_info minfo; + struct xc_domain_meminfo minfo; struct xc_mmu *mmu = NULL; struct pte_backup old_ptes = {NULL, 0, 0}; grant_entry_v1_t *gnttab_v1 = NULL; @@ -549,6 +405,8 @@ int xc_exchange_page(xc_interface *xch, int domid, xen_pfn_t mfn) int rc, result = -1; uint32_t status; xen_pfn_t new_mfn, gpfn; + xen_pfn_t *m2p_table; + int max_mfn; if ( xc_domain_getinfo(xch, domid, 1, &info) != 1 ) { @@ -568,10 +426,26 @@ int xc_exchange_page(xc_interface *xch, int domid, xen_pfn_t mfn) return -EINVAL; } - /* Get domain's memory information */ + /* Map M2P and obtain gpfn */ + max_mfn = xc_maximum_ram_page(xch); + if ( !(m2p_table = xc_map_m2p(xch, max_mfn, PROT_READ, NULL)) ) + { + PERROR("Failed to map live M2P table"); + return -EFAULT; + } + gpfn = m2p_table[mfn]; + + /* Map domain's memory information */ memset(&minfo, 0, sizeof(minfo)); - init_mem_info(xch, domid, &minfo, &info); - gpfn = minfo.m2p_table[mfn]; + if ( xc_map_domain_meminfo(xch, domid, &minfo) ) + { + PERROR("Could not map domain's memory information\n"); + return -EFAULT; + } + + /* For translation macros */ + dinfo->guest_width = minfo.guest_width; + dinfo->p2m_size = minfo.p2m_size; /* Don't exchange CR3 for PAE guest in PAE host environment */ if (minfo.guest_width > sizeof(long)) @@ -766,7 +640,8 @@ failed: if (gnttab_v2) munmap(gnttab_v2, gnt_num / (PAGE_SIZE/sizeof(grant_entry_v2_t))); - close_mem_info(xch, &minfo); + xc_unmap_domain_meminfo(xch, &minfo); + munmap(m2p_table, M2P_SIZE(max_mfn)); return result; } |