+++ /dev/null
-/******************************************************************************
- * xc_hvm_build.c
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation;
- * version 2.1 of the License.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include <stddef.h>
-#include <inttypes.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <zlib.h>
-
-#include "xg_private.h"
-#include "xc_private.h"
-
-#include <xen/foreign/x86_32.h>
-#include <xen/foreign/x86_64.h>
-#include <xen/hvm/hvm_info_table.h>
-#include <xen/hvm/params.h>
-#include <xen/hvm/e820.h>
-
-#include <xen/libelf/libelf.h>
-
-#define SUPERPAGE_2MB_SHIFT 9
-#define SUPERPAGE_2MB_NR_PFNS (1UL << SUPERPAGE_2MB_SHIFT)
-#define SUPERPAGE_1GB_SHIFT 18
-#define SUPERPAGE_1GB_NR_PFNS (1UL << SUPERPAGE_1GB_SHIFT)
-
-#define SPECIALPAGE_PAGING 0
-#define SPECIALPAGE_ACCESS 1
-#define SPECIALPAGE_SHARING 2
-#define SPECIALPAGE_BUFIOREQ 3
-#define SPECIALPAGE_XENSTORE 4
-#define SPECIALPAGE_IOREQ 5
-#define SPECIALPAGE_IDENT_PT 6
-#define SPECIALPAGE_CONSOLE 7
-#define NR_SPECIAL_PAGES 8
-#define special_pfn(x) (0xff000u - NR_SPECIAL_PAGES + (x))
-
-#define NR_IOREQ_SERVER_PAGES 8
-#define ioreq_server_pfn(x) (special_pfn(0) - NR_IOREQ_SERVER_PAGES + (x))
-
-#define VGA_HOLE_SIZE (0x20)
-
-static int modules_init(struct xc_hvm_build_args *args,
- uint64_t vend, struct elf_binary *elf,
- uint64_t *mstart_out, uint64_t *mend_out)
-{
-#define MODULE_ALIGN 1UL << 7
-#define MB_ALIGN 1UL << 20
-#define MKALIGN(x, a) (((uint64_t)(x) + (a) - 1) & ~(uint64_t)((a) - 1))
- uint64_t total_len = 0, offset1 = 0;
-
- if ( (args->acpi_module.length == 0)&&(args->smbios_module.length == 0) )
- return 0;
-
- /* Find the total length for the firmware modules with a reasonable large
- * alignment size to align each the modules.
- */
- total_len = MKALIGN(args->acpi_module.length, MODULE_ALIGN);
- offset1 = total_len;
- total_len += MKALIGN(args->smbios_module.length, MODULE_ALIGN);
-
- /* Want to place the modules 1Mb+change behind the loader image. */
- *mstart_out = MKALIGN(elf->pend, MB_ALIGN) + (MB_ALIGN);
- *mend_out = *mstart_out + total_len;
-
- if ( *mend_out > vend )
- return -1;
-
- if ( args->acpi_module.length != 0 )
- args->acpi_module.guest_addr_out = *mstart_out;
- if ( args->smbios_module.length != 0 )
- args->smbios_module.guest_addr_out = *mstart_out + offset1;
-
- return 0;
-}
-
-static void build_hvm_info(void *hvm_info_page,
- struct xc_hvm_build_args *args)
-{
- struct hvm_info_table *hvm_info = (struct hvm_info_table *)
- (((unsigned char *)hvm_info_page) + HVM_INFO_OFFSET);
- uint8_t sum;
- int i;
-
- memset(hvm_info_page, 0, PAGE_SIZE);
-
- /* Fill in the header. */
- memcpy(hvm_info->signature, "HVM INFO", sizeof(hvm_info->signature));
- hvm_info->length = sizeof(struct hvm_info_table);
-
- /* Sensible defaults: these can be overridden by the caller. */
- hvm_info->apic_mode = 1;
- hvm_info->nr_vcpus = 1;
- memset(hvm_info->vcpu_online, 0xff, sizeof(hvm_info->vcpu_online));
-
- /* Memory parameters. */
- hvm_info->low_mem_pgend = args->lowmem_end >> PAGE_SHIFT;
- hvm_info->high_mem_pgend = args->highmem_end >> PAGE_SHIFT;
- hvm_info->reserved_mem_pgstart = ioreq_server_pfn(0);
-
- /* Finish with the checksum. */
- for ( i = 0, sum = 0; i < hvm_info->length; i++ )
- sum += ((uint8_t *)hvm_info)[i];
- hvm_info->checksum = -sum;
-}
-
-static int loadelfimage(xc_interface *xch, struct elf_binary *elf,
- uint32_t dom, unsigned long *parray)
-{
- privcmd_mmap_entry_t *entries = NULL;
- unsigned long pfn_start = elf->pstart >> PAGE_SHIFT;
- unsigned long pfn_end = (elf->pend + PAGE_SIZE - 1) >> PAGE_SHIFT;
- size_t pages = pfn_end - pfn_start;
- int i, rc = -1;
-
- /* Map address space for initial elf image. */
- entries = calloc(pages, sizeof(privcmd_mmap_entry_t));
- if ( entries == NULL )
- goto err;
-
- for ( i = 0; i < pages; i++ )
- entries[i].mfn = parray[(elf->pstart >> PAGE_SHIFT) + i];
-
- elf->dest_base = xc_map_foreign_ranges(
- xch, dom, pages << PAGE_SHIFT, PROT_READ | PROT_WRITE, 1 << PAGE_SHIFT,
- entries, pages);
- if ( elf->dest_base == NULL )
- goto err;
- elf->dest_size = pages * PAGE_SIZE;
-
- ELF_ADVANCE_DEST(elf, elf->pstart & (PAGE_SIZE - 1));
-
- /* Load the initial elf image. */
- rc = elf_load_binary(elf);
- if ( rc < 0 )
- PERROR("Failed to load elf binary\n");
-
- munmap(elf->dest_base, pages << PAGE_SHIFT);
- elf->dest_base = NULL;
- elf->dest_size = 0;
-
- err:
- free(entries);
-
- return rc;
-}
-
-static int loadmodules(xc_interface *xch,
- struct xc_hvm_build_args *args,
- uint64_t mstart, uint64_t mend,
- uint32_t dom, unsigned long *parray)
-{
- privcmd_mmap_entry_t *entries = NULL;
- unsigned long pfn_start;
- unsigned long pfn_end;
- size_t pages;
- uint32_t i;
- uint8_t *dest;
- int rc = -1;
-
- if ( (mstart == 0)||(mend == 0) )
- return 0;
-
- pfn_start = (unsigned long)(mstart >> PAGE_SHIFT);
- pfn_end = (unsigned long)((mend + PAGE_SIZE - 1) >> PAGE_SHIFT);
- pages = pfn_end - pfn_start;
-
- /* Map address space for module list. */
- entries = calloc(pages, sizeof(privcmd_mmap_entry_t));
- if ( entries == NULL )
- goto error_out;
-
- for ( i = 0; i < pages; i++ )
- entries[i].mfn = parray[(mstart >> PAGE_SHIFT) + i];
-
- dest = xc_map_foreign_ranges(
- xch, dom, pages << PAGE_SHIFT, PROT_READ | PROT_WRITE, 1 << PAGE_SHIFT,
- entries, pages);
- if ( dest == NULL )
- goto error_out;
-
- /* Zero the range so padding is clear between modules */
- memset(dest, 0, pages << PAGE_SHIFT);
-
- /* Load modules into range */
- if ( args->acpi_module.length != 0 )
- {
- memcpy(dest,
- args->acpi_module.data,
- args->acpi_module.length);
- }
- if ( args->smbios_module.length != 0 )
- {
- memcpy(dest + (args->smbios_module.guest_addr_out - mstart),
- args->smbios_module.data,
- args->smbios_module.length);
- }
-
- munmap(dest, pages << PAGE_SHIFT);
- rc = 0;
-
- error_out:
- free(entries);
-
- return rc;
-}
-
-/*
- * Check whether there exists mmio hole in the specified memory range.
- * Returns 1 if exists, else returns 0.
- */
-static int check_mmio_hole(uint64_t start, uint64_t memsize,
- uint64_t mmio_start, uint64_t mmio_size)
-{
- if ( start + memsize <= mmio_start || start >= mmio_start + mmio_size )
- return 0;
- else
- return 1;
-}
-
-static int xc_hvm_populate_memory(xc_interface *xch, uint32_t dom,
- struct xc_hvm_build_args *args,
- xen_pfn_t *page_array)
-{
- unsigned long i, vmemid, nr_pages = args->mem_size >> PAGE_SHIFT;
- unsigned long p2m_size;
- unsigned long target_pages = args->mem_target >> PAGE_SHIFT;
- unsigned long cur_pages, cur_pfn;
- int rc;
- xen_capabilities_info_t caps;
- unsigned long stat_normal_pages = 0, stat_2mb_pages = 0,
- stat_1gb_pages = 0;
- unsigned int memflags = 0;
- int claim_enabled = args->claim_enabled;
- uint64_t total_pages;
- xen_vmemrange_t dummy_vmemrange[2];
- unsigned int dummy_vnode_to_pnode[1];
- xen_vmemrange_t *vmemranges;
- unsigned int *vnode_to_pnode;
- unsigned int nr_vmemranges, nr_vnodes;
-
- if ( nr_pages > target_pages )
- memflags |= XENMEMF_populate_on_demand;
-
- if ( args->nr_vmemranges == 0 )
- {
- /* Build dummy vnode information
- *
- * Guest physical address space layout:
- * [0, hole_start) [hole_start, 4G) [4G, highmem_end)
- *
- * Of course if there is no high memory, the second vmemrange
- * has no effect on the actual result.
- */
-
- dummy_vmemrange[0].start = 0;
- dummy_vmemrange[0].end = args->lowmem_end;
- dummy_vmemrange[0].flags = 0;
- dummy_vmemrange[0].nid = 0;
- nr_vmemranges = 1;
-
- if ( args->highmem_end > (1ULL << 32) )
- {
- dummy_vmemrange[1].start = 1ULL << 32;
- dummy_vmemrange[1].end = args->highmem_end;
- dummy_vmemrange[1].flags = 0;
- dummy_vmemrange[1].nid = 0;
-
- nr_vmemranges++;
- }
-
- dummy_vnode_to_pnode[0] = XC_NUMA_NO_NODE;
- nr_vnodes = 1;
- vmemranges = dummy_vmemrange;
- vnode_to_pnode = dummy_vnode_to_pnode;
- }
- else
- {
- if ( nr_pages > target_pages )
- {
- PERROR("Cannot enable vNUMA and PoD at the same time");
- goto error_out;
- }
-
- nr_vmemranges = args->nr_vmemranges;
- nr_vnodes = args->nr_vnodes;
- vmemranges = args->vmemranges;
- vnode_to_pnode = args->vnode_to_pnode;
- }
-
- total_pages = 0;
- p2m_size = 0;
- for ( i = 0; i < nr_vmemranges; i++ )
- {
- total_pages += ((vmemranges[i].end - vmemranges[i].start)
- >> PAGE_SHIFT);
- p2m_size = p2m_size > (vmemranges[i].end >> PAGE_SHIFT) ?
- p2m_size : (vmemranges[i].end >> PAGE_SHIFT);
- }
-
- if ( total_pages != (args->mem_size >> PAGE_SHIFT) )
- {
- PERROR("vNUMA memory pages mismatch (0x%"PRIx64" != 0x%"PRIx64")",
- total_pages, args->mem_size >> PAGE_SHIFT);
- goto error_out;
- }
-
- if ( xc_version(xch, XENVER_capabilities, &caps) != 0 )
- {
- PERROR("Could not get Xen capabilities");
- goto error_out;
- }
-
- for ( i = 0; i < p2m_size; i++ )
- page_array[i] = ((xen_pfn_t)-1);
- for ( vmemid = 0; vmemid < nr_vmemranges; vmemid++ )
- {
- uint64_t pfn;
-
- for ( pfn = vmemranges[vmemid].start >> PAGE_SHIFT;
- pfn < vmemranges[vmemid].end >> PAGE_SHIFT;
- pfn++ )
- page_array[pfn] = pfn;
- }
-
- /*
- * Try to claim pages for early warning of insufficient memory available.
- * This should go before xc_domain_set_pod_target, becuase that function
- * actually allocates memory for the guest. Claiming after memory has been
- * allocated is pointless.
- */
- if ( claim_enabled ) {
- rc = xc_domain_claim_pages(xch, dom, target_pages - VGA_HOLE_SIZE);
- if ( rc != 0 )
- {
- PERROR("Could not allocate memory for HVM guest as we cannot claim memory!");
- goto error_out;
- }
- }
-
- if ( memflags & XENMEMF_populate_on_demand )
- {
- /*
- * Subtract VGA_HOLE_SIZE from target_pages for the VGA
- * "hole". Xen will adjust the PoD cache size so that domain
- * tot_pages will be target_pages - VGA_HOLE_SIZE after
- * this call.
- */
- rc = xc_domain_set_pod_target(xch, dom,
- target_pages - VGA_HOLE_SIZE,
- NULL, NULL, NULL);
- if ( rc != 0 )
- {
- PERROR("Could not set PoD target for HVM guest.\n");
- goto error_out;
- }
- }
-
- /*
- * Allocate memory for HVM guest, skipping VGA hole 0xA0000-0xC0000.
- *
- * We attempt to allocate 1GB pages if possible. It falls back on 2MB
- * pages if 1GB allocation fails. 4KB pages will be used eventually if
- * both fail.
- *
- * Under 2MB mode, we allocate pages in batches of no more than 8MB to
- * ensure that we can be preempted and hence dom0 remains responsive.
- */
- rc = xc_domain_populate_physmap_exact(
- xch, dom, 0xa0, 0, memflags, &page_array[0x00]);
-
- stat_normal_pages = 0;
- for ( vmemid = 0; vmemid < nr_vmemranges; vmemid++ )
- {
- unsigned int new_memflags = memflags;
- uint64_t end_pages;
- unsigned int vnode = vmemranges[vmemid].nid;
- unsigned int pnode = vnode_to_pnode[vnode];
-
- if ( pnode != XC_NUMA_NO_NODE )
- new_memflags |= XENMEMF_exact_node(pnode);
-
- end_pages = vmemranges[vmemid].end >> PAGE_SHIFT;
- /*
- * Consider vga hole belongs to the vmemrange that covers
- * 0xA0000-0xC0000. Note that 0x00000-0xA0000 is populated just
- * before this loop.
- */
- if ( vmemranges[vmemid].start == 0 )
- {
- cur_pages = 0xc0;
- stat_normal_pages += 0xc0;
- }
- else
- cur_pages = vmemranges[vmemid].start >> PAGE_SHIFT;
-
- while ( (rc == 0) && (end_pages > cur_pages) )
- {
- /* Clip count to maximum 1GB extent. */
- unsigned long count = end_pages - cur_pages;
- unsigned long max_pages = SUPERPAGE_1GB_NR_PFNS;
-
- if ( count > max_pages )
- count = max_pages;
-
- cur_pfn = page_array[cur_pages];
-
- /* Take care the corner cases of super page tails */
- if ( ((cur_pfn & (SUPERPAGE_1GB_NR_PFNS-1)) != 0) &&
- (count > (-cur_pfn & (SUPERPAGE_1GB_NR_PFNS-1))) )
- count = -cur_pfn & (SUPERPAGE_1GB_NR_PFNS-1);
- else if ( ((count & (SUPERPAGE_1GB_NR_PFNS-1)) != 0) &&
- (count > SUPERPAGE_1GB_NR_PFNS) )
- count &= ~(SUPERPAGE_1GB_NR_PFNS - 1);
-
- /* Attemp to allocate 1GB super page. Because in each pass
- * we only allocate at most 1GB, we don't have to clip
- * super page boundaries.
- */
- if ( ((count | cur_pfn) & (SUPERPAGE_1GB_NR_PFNS - 1)) == 0 &&
- /* Check if there exists MMIO hole in the 1GB memory
- * range */
- !check_mmio_hole(cur_pfn << PAGE_SHIFT,
- SUPERPAGE_1GB_NR_PFNS << PAGE_SHIFT,
- args->mmio_start, args->mmio_size) )
- {
- long done;
- unsigned long nr_extents = count >> SUPERPAGE_1GB_SHIFT;
- xen_pfn_t sp_extents[nr_extents];
-
- for ( i = 0; i < nr_extents; i++ )
- sp_extents[i] =
- page_array[cur_pages+(i<<SUPERPAGE_1GB_SHIFT)];
-
- done = xc_domain_populate_physmap(xch, dom, nr_extents,
- SUPERPAGE_1GB_SHIFT,
- new_memflags,
- sp_extents);
-
- if ( done > 0 )
- {
- stat_1gb_pages += done;
- done <<= SUPERPAGE_1GB_SHIFT;
- cur_pages += done;
- count -= done;
- }
- }
-
- if ( count != 0 )
- {
- /* Clip count to maximum 8MB extent. */
- max_pages = SUPERPAGE_2MB_NR_PFNS * 4;
- if ( count > max_pages )
- count = max_pages;
-
- /* Clip partial superpage extents to superpage
- * boundaries. */
- if ( ((cur_pfn & (SUPERPAGE_2MB_NR_PFNS-1)) != 0) &&
- (count > (-cur_pfn & (SUPERPAGE_2MB_NR_PFNS-1))) )
- count = -cur_pfn & (SUPERPAGE_2MB_NR_PFNS-1);
- else if ( ((count & (SUPERPAGE_2MB_NR_PFNS-1)) != 0) &&
- (count > SUPERPAGE_2MB_NR_PFNS) )
- count &= ~(SUPERPAGE_2MB_NR_PFNS - 1); /* clip non-s.p. tail */
-
- /* Attempt to allocate superpage extents. */
- if ( ((count | cur_pfn) & (SUPERPAGE_2MB_NR_PFNS - 1)) == 0 )
- {
- long done;
- unsigned long nr_extents = count >> SUPERPAGE_2MB_SHIFT;
- xen_pfn_t sp_extents[nr_extents];
-
- for ( i = 0; i < nr_extents; i++ )
- sp_extents[i] =
- page_array[cur_pages+(i<<SUPERPAGE_2MB_SHIFT)];
-
- done = xc_domain_populate_physmap(xch, dom, nr_extents,
- SUPERPAGE_2MB_SHIFT,
- new_memflags,
- sp_extents);
-
- if ( done > 0 )
- {
- stat_2mb_pages += done;
- done <<= SUPERPAGE_2MB_SHIFT;
- cur_pages += done;
- count -= done;
- }
- }
- }
-
- /* Fall back to 4kB extents. */
- if ( count != 0 )
- {
- rc = xc_domain_populate_physmap_exact(
- xch, dom, count, 0, new_memflags, &page_array[cur_pages]);
- cur_pages += count;
- stat_normal_pages += count;
- }
- }
-
- if ( rc != 0 )
- break;
- }
-
- if ( rc != 0 )
- {
- PERROR("Could not allocate memory for HVM guest.");
- goto error_out;
- }
-
- DPRINTF("PHYSICAL MEMORY ALLOCATION:\n");
- DPRINTF(" 4KB PAGES: 0x%016lx\n", stat_normal_pages);
- DPRINTF(" 2MB PAGES: 0x%016lx\n", stat_2mb_pages);
- DPRINTF(" 1GB PAGES: 0x%016lx\n", stat_1gb_pages);
-
- rc = 0;
- goto out;
- error_out:
- rc = -1;
- out:
-
- /* ensure no unclaimed pages are left unused */
- xc_domain_claim_pages(xch, dom, 0 /* cancels the claim */);
-
- return rc;
-}
-
-static int xc_hvm_load_image(xc_interface *xch,
- uint32_t dom, struct xc_hvm_build_args *args,
- xen_pfn_t *page_array)
-{
- unsigned long entry_eip, image_size;
- struct elf_binary elf;
- uint64_t v_start, v_end;
- uint64_t m_start = 0, m_end = 0;
- char *image;
- int rc;
-
- image = xc_read_image(xch, args->image_file_name, &image_size);
- if ( image == NULL )
- return -1;
-
- memset(&elf, 0, sizeof(elf));
- if ( elf_init(&elf, image, image_size) != 0 )
- goto error_out;
-
- xc_elf_set_logfile(xch, &elf, 1);
-
- elf_parse_binary(&elf);
- v_start = 0;
- v_end = args->mem_size;
-
- if ( modules_init(args, v_end, &elf, &m_start, &m_end) != 0 )
- {
- ERROR("Insufficient space to load modules.");
- goto error_out;
- }
-
- DPRINTF("VIRTUAL MEMORY ARRANGEMENT:\n");
- DPRINTF(" Loader: %016"PRIx64"->%016"PRIx64"\n", elf.pstart, elf.pend);
- DPRINTF(" Modules: %016"PRIx64"->%016"PRIx64"\n", m_start, m_end);
-
- if ( loadelfimage(xch, &elf, dom, page_array) != 0 )
- {
- PERROR("Could not load ELF image");
- goto error_out;
- }
-
- if ( loadmodules(xch, args, m_start, m_end, dom, page_array) != 0 )
- {
- PERROR("Could not load ACPI modules");
- goto error_out;
- }
-
- /* Insert JMP <rel32> instruction at address 0x0 to reach entry point. */
- entry_eip = elf_uval(&elf, elf.ehdr, e_entry);
- if ( entry_eip != 0 )
- {
- char *page0 = xc_map_foreign_range(
- xch, dom, PAGE_SIZE, PROT_READ | PROT_WRITE, 0);
- if ( page0 == NULL )
- goto error_out;
- page0[0] = 0xe9;
- *(uint32_t *)&page0[1] = entry_eip - 5;
- munmap(page0, PAGE_SIZE);
- }
-
- rc = 0;
- goto out;
- error_out:
- rc = -1;
- out:
- if ( elf_check_broken(&elf) )
- ERROR("HVM ELF broken: %s", elf_check_broken(&elf));
- free(image);
-
- return rc;
-}
-
-static int xc_hvm_populate_params(xc_interface *xch, uint32_t dom,
- struct xc_hvm_build_args *args)
-{
- unsigned long i;
- void *hvm_info_page;
- uint32_t *ident_pt;
- uint64_t v_end;
- int rc;
- xen_pfn_t special_array[NR_SPECIAL_PAGES];
- xen_pfn_t ioreq_server_array[NR_IOREQ_SERVER_PAGES];
-
- v_end = args->mem_size;
-
- if ( (hvm_info_page = xc_map_foreign_range(
- xch, dom, PAGE_SIZE, PROT_READ | PROT_WRITE,
- HVM_INFO_PFN)) == NULL )
- {
- PERROR("Could not map hvm info page");
- goto error_out;
- }
- build_hvm_info(hvm_info_page, args);
- munmap(hvm_info_page, PAGE_SIZE);
-
- /* Allocate and clear special pages. */
- for ( i = 0; i < NR_SPECIAL_PAGES; i++ )
- special_array[i] = special_pfn(i);
-
- rc = xc_domain_populate_physmap_exact(xch, dom, NR_SPECIAL_PAGES, 0, 0,
- special_array);
- if ( rc != 0 )
- {
- PERROR("Could not allocate special pages.");
- goto error_out;
- }
-
- if ( xc_clear_domain_pages(xch, dom, special_pfn(0), NR_SPECIAL_PAGES) )
- {
- PERROR("Could not clear special pages");
- goto error_out;
- }
-
- xc_hvm_param_set(xch, dom, HVM_PARAM_STORE_PFN,
- special_pfn(SPECIALPAGE_XENSTORE));
- xc_hvm_param_set(xch, dom, HVM_PARAM_BUFIOREQ_PFN,
- special_pfn(SPECIALPAGE_BUFIOREQ));
- xc_hvm_param_set(xch, dom, HVM_PARAM_IOREQ_PFN,
- special_pfn(SPECIALPAGE_IOREQ));
- xc_hvm_param_set(xch, dom, HVM_PARAM_CONSOLE_PFN,
- special_pfn(SPECIALPAGE_CONSOLE));
- xc_hvm_param_set(xch, dom, HVM_PARAM_PAGING_RING_PFN,
- special_pfn(SPECIALPAGE_PAGING));
- xc_hvm_param_set(xch, dom, HVM_PARAM_MONITOR_RING_PFN,
- special_pfn(SPECIALPAGE_ACCESS));
- xc_hvm_param_set(xch, dom, HVM_PARAM_SHARING_RING_PFN,
- special_pfn(SPECIALPAGE_SHARING));
-
- /*
- * Allocate and clear additional ioreq server pages. The default
- * server will use the IOREQ and BUFIOREQ special pages above.
- */
- for ( i = 0; i < NR_IOREQ_SERVER_PAGES; i++ )
- ioreq_server_array[i] = ioreq_server_pfn(i);
-
- rc = xc_domain_populate_physmap_exact(xch, dom, NR_IOREQ_SERVER_PAGES, 0, 0,
- ioreq_server_array);
- if ( rc != 0 )
- {
- PERROR("Could not allocate ioreq server pages.");
- goto error_out;
- }
-
- if ( xc_clear_domain_pages(xch, dom, ioreq_server_pfn(0), NR_IOREQ_SERVER_PAGES) )
- {
- PERROR("Could not clear ioreq page");
- goto error_out;
- }
-
- /* Tell the domain where the pages are and how many there are */
- xc_hvm_param_set(xch, dom, HVM_PARAM_IOREQ_SERVER_PFN,
- ioreq_server_pfn(0));
- xc_hvm_param_set(xch, dom, HVM_PARAM_NR_IOREQ_SERVER_PAGES,
- NR_IOREQ_SERVER_PAGES);
-
- /*
- * Identity-map page table is required for running with CR0.PG=0 when
- * using Intel EPT. Create a 32-bit non-PAE page directory of superpages.
- */
- if ( (ident_pt = xc_map_foreign_range(
- xch, dom, PAGE_SIZE, PROT_READ | PROT_WRITE,
- special_pfn(SPECIALPAGE_IDENT_PT))) == NULL )
- {
- PERROR("Could not map special page ident_pt");
- goto error_out;
- }
- for ( i = 0; i < PAGE_SIZE / sizeof(*ident_pt); i++ )
- ident_pt[i] = ((i << 22) | _PAGE_PRESENT | _PAGE_RW | _PAGE_USER |
- _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_PSE);
- munmap(ident_pt, PAGE_SIZE);
- xc_hvm_param_set(xch, dom, HVM_PARAM_IDENT_PT,
- special_pfn(SPECIALPAGE_IDENT_PT) << PAGE_SHIFT);
-
- rc = 0;
- goto out;
- error_out:
- rc = -1;
- out:
-
- return rc;
-}
-
-/* xc_hvm_build:
- * Create a domain for a virtualized Linux, using files/filenames.
- */
-int xc_hvm_build(xc_interface *xch, uint32_t domid,
- struct xc_hvm_build_args *hvm_args)
-{
- struct xc_hvm_build_args args = *hvm_args;
- xen_pfn_t *parray = NULL;
- int rc;
-
- if ( domid == 0 )
- return -1;
- if ( args.image_file_name == NULL )
- return -1;
-
- /* An HVM guest must be initialised with at least 2MB memory. */
- if ( args.mem_size < (2ull << 20) || args.mem_target < (2ull << 20) )
- return -1;
-
- parray = malloc((args.mem_size >> PAGE_SHIFT) * sizeof(xen_pfn_t));
- if ( parray == NULL )
- return -1;
-
- rc = xc_hvm_populate_memory(xch, domid, &args, parray);
- if ( rc != 0 )
- {
- PERROR("xc_hvm_populate_memory failed");
- goto out;
- }
- rc = xc_hvm_load_image(xch, domid, &args, parray);
- if ( rc != 0 )
- {
- PERROR("xc_hvm_load_image failed");
- goto out;
- }
- rc = xc_hvm_populate_params(xch, domid, &args);
- if ( rc != 0 )
- {
- PERROR("xc_hvm_populate_params failed");
- goto out;
- }
-
- /* Return module load addresses to caller */
- hvm_args->acpi_module.guest_addr_out = args.acpi_module.guest_addr_out;
- hvm_args->smbios_module.guest_addr_out = args.smbios_module.guest_addr_out;
-
-out:
- free(parray);
-
- return rc;
-}
-
-/* xc_hvm_build_target_mem:
- * Create a domain for a pre-ballooned virtualized Linux, using
- * files/filenames. If target < memsize, domain is created with
- * memsize pages marked populate-on-demand,
- * calculating pod cache size based on target.
- * If target == memsize, pages are populated normally.
- */
-int xc_hvm_build_target_mem(xc_interface *xch,
- uint32_t domid,
- int memsize,
- int target,
- const char *image_name)
-{
- struct xc_hvm_build_args args = {};
-
- memset(&args, 0, sizeof(struct xc_hvm_build_args));
- args.mem_size = (uint64_t)memsize << 20;
- args.mem_target = (uint64_t)target << 20;
- args.image_file_name = image_name;
- if ( args.mmio_size == 0 )
- args.mmio_size = HVM_BELOW_4G_MMIO_LENGTH;
-
- return xc_hvm_build(xch, domid, &args);
-}
-
-/*
- * Local variables:
- * mode: C
- * c-file-style: "BSD"
- * c-basic-offset: 4
- * tab-width: 4
- * indent-tabs-mode: nil
- * End:
- */
projects / people / julieng / xen-unstable.git / commitdiff