|
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH RFC 4/5] x86: split PVH dom0 builder to domain_build_pv.c
Long term we want to be able to disentangle PV and HVM code. Move the
PVH domain builder to a dedicated file. It will later depends on
CONFIG_HVM or CONFIG_PVH.
This in turn requires exposing a few functions and variables via
domain_build.h.
Signed-off-by: Wei Liu <wei.liu2@xxxxxxxxxx>
---
xen/arch/x86/Makefile | 1 +
xen/arch/x86/domain_build.c | 1068 +------------------------------------
xen/arch/x86/domain_build.h | 8 +
xen/arch/x86/domain_build_pvh.c | 1097 +++++++++++++++++++++++++++++++++++++++
4 files changed, 1108 insertions(+), 1066 deletions(-)
create mode 100644 xen/arch/x86/domain_build_pvh.c
diff --git a/xen/arch/x86/Makefile b/xen/arch/x86/Makefile
index e4c134e66a..2ad94f50a8 100644
--- a/xen/arch/x86/Makefile
+++ b/xen/arch/x86/Makefile
@@ -25,6 +25,7 @@ obj-y += domctl.o
obj-y += domain.o
obj-bin-y += domain_build.init.o
obj-bin-y += domain_build_pv.init.o
+obj-bin-y += domain_build_pvh.init.o
obj-y += domain_page.o
obj-y += e820.o
obj-y += extable.o
diff --git a/xen/arch/x86/domain_build.c b/xen/arch/x86/domain_build.c
index 4cabe2fb2e..64a978473d 100644
--- a/xen/arch/x86/domain_build.c
+++ b/xen/arch/x86/domain_build.c
@@ -51,27 +51,6 @@ static long __initdata dom0_nrpages;
static long __initdata dom0_min_nrpages;
static long __initdata dom0_max_nrpages = LONG_MAX;
-/*
- * Have the TSS cover the ISA port range, which makes it
- * - 104 bytes base structure
- * - 32 bytes interrupt redirection bitmap
- * - 128 bytes I/O bitmap
- * - one trailing byte
- * or a total of 265 bytes.
- *
- * NB: as PVHv2 Dom0 doesn't have legacy devices (ISA), it shouldn't have any
- * business in accessing the ISA port range, much less in real mode, and due to
- * the lack of firmware it shouldn't also execute any INT instruction. This is
- * done just for consistency with what hvmloader does.
- */
-#define HVM_VM86_TSS_SIZE 265
-
-static unsigned int __initdata acpi_intr_overrides;
-static struct acpi_madt_interrupt_override __initdata *intsrcovr;
-
-static unsigned int __initdata acpi_nmi_sources;
-static struct acpi_madt_nmi_source __initdata *nmisrc;
-
/*
* dom0_mem=[min:<min_amt>,][max:<max_amt>,][<amt>]
*
@@ -262,8 +241,8 @@ boolean_param("ro-hpet", ro_hpet);
unsigned int __initdata memflags = MEMF_no_dma|MEMF_exact_node;
-static unsigned long __init dom0_paging_pages(const struct domain *d,
- unsigned long nr_pages)
+unsigned long __init dom0_paging_pages(const struct domain *d,
+ unsigned long nr_pages)
{
/* Copied from: libxl_get_required_shadow_memory() */
unsigned long memkb = nr_pages * (PAGE_SIZE / 1024);
@@ -492,1049 +471,6 @@ int __init setup_permissions(struct domain *d)
return rc;
}
-
-static int __init modify_identity_mmio(struct domain *d, unsigned long pfn,
- unsigned long nr_pages, const bool map)
-{
- int rc;
-
- for ( ; ; )
- {
- rc = (map ? map_mmio_regions : unmap_mmio_regions)
- (d, _gfn(pfn), nr_pages, _mfn(pfn));
- if ( rc == 0 )
- break;
- if ( rc < 0 )
- {
- printk(XENLOG_WARNING
- "Failed to identity %smap [%#lx,%#lx) for d%d: %d\n",
- map ? "" : "un", pfn, pfn + nr_pages, d->domain_id, rc);
- break;
- }
- nr_pages -= rc;
- pfn += rc;
- process_pending_softirqs();
- }
-
- return rc;
-}
-
-/* Populate a HVM memory range using the biggest possible order. */
-static int __init pvh_populate_memory_range(struct domain *d,
- unsigned long start,
- unsigned long nr_pages)
-{
- unsigned int order, i = 0;
- struct page_info *page;
- int rc;
-#define MAP_MAX_ITER 64
-
- order = MAX_ORDER;
- while ( nr_pages != 0 )
- {
- unsigned int range_order = get_order_from_pages(nr_pages + 1);
-
- order = min(range_order ? range_order - 1 : 0, order);
- page = alloc_domheap_pages(d, order, memflags);
- if ( page == NULL )
- {
- if ( order == 0 && memflags )
- {
- /* Try again without any memflags. */
- memflags = 0;
- order = MAX_ORDER;
- continue;
- }
- if ( order == 0 )
- {
- printk("Unable to allocate memory with order 0!\n");
- return -ENOMEM;
- }
- order--;
- continue;
- }
-
- rc = guest_physmap_add_page(d, _gfn(start), _mfn(page_to_mfn(page)),
- order);
- if ( rc != 0 )
- {
- printk("Failed to populate memory: [%#lx,%lx): %d\n",
- start, start + (1UL << order), rc);
- return -ENOMEM;
- }
- start += 1UL << order;
- nr_pages -= 1UL << order;
- if ( (++i % MAP_MAX_ITER) == 0 )
- process_pending_softirqs();
- }
-
- return 0;
-#undef MAP_MAX_ITER
-}
-
-/* Steal RAM from the end of a memory region. */
-static int __init pvh_steal_ram(struct domain *d, unsigned long size,
- unsigned long align, paddr_t limit,
- paddr_t *addr)
-{
- unsigned int i = d->arch.nr_e820;
-
- /*
- * Alignment 0 should be set to 1, so it doesn't wrap around in the
- * calculations below.
- */
- align = align ? : 1;
- while ( i-- )
- {
- struct e820entry *entry = &d->arch.e820[i];
-
- if ( entry->type != E820_RAM || entry->addr + entry->size > limit ||
- entry->addr < MB(1) )
- continue;
-
- *addr = (entry->addr + entry->size - size) & ~(align - 1);
- if ( *addr < entry->addr )
- continue;
-
- entry->size = *addr - entry->addr;
- return 0;
- }
-
- return -ENOMEM;
-}
-
-/* NB: memory map must be sorted at all times for this to work correctly. */
-static int __init pvh_add_mem_range(struct domain *d, uint64_t s, uint64_t e,
- unsigned int type)
-{
- struct e820entry *map;
- unsigned int i;
-
- for ( i = 0; i < d->arch.nr_e820; i++ )
- {
- uint64_t rs = d->arch.e820[i].addr;
- uint64_t re = rs + d->arch.e820[i].size;
-
- if ( rs == e && d->arch.e820[i].type == type )
- {
- d->arch.e820[i].addr = s;
- return 0;
- }
-
- if ( re == s && d->arch.e820[i].type == type &&
- (i + 1 == d->arch.nr_e820 || d->arch.e820[i + 1].addr >= e) )
- {
- d->arch.e820[i].size += e - s;
- return 0;
- }
-
- if ( rs >= e )
- break;
-
- if ( re > s )
- return -EEXIST;
- }
-
- map = xzalloc_array(struct e820entry, d->arch.nr_e820 + 1);
- if ( !map )
- {
- printk(XENLOG_WARNING "E820: out of memory to add region\n");
- return -ENOMEM;
- }
-
- memcpy(map, d->arch.e820, i * sizeof(*d->arch.e820));
- memcpy(map + i + 1, d->arch.e820 + i,
- (d->arch.nr_e820 - i) * sizeof(*d->arch.e820));
- map[i].addr = s;
- map[i].size = e - s;
- map[i].type = type;
- xfree(d->arch.e820);
- d->arch.e820 = map;
- d->arch.nr_e820++;
-
- return 0;
-}
-
-static int __init pvh_setup_vmx_realmode_helpers(struct domain *d)
-{
- p2m_type_t p2mt;
- uint32_t rc, *ident_pt;
- mfn_t mfn;
- paddr_t gaddr;
- struct vcpu *v = d->vcpu[0];
-
- /*
- * Steal some space from the last RAM region below 4GB and use it to
- * store the real-mode TSS. It needs to be aligned to 128 so that the
- * TSS structure (which accounts for the first 104b) doesn't cross
- * a page boundary.
- */
- if ( !pvh_steal_ram(d, HVM_VM86_TSS_SIZE, 128, GB(4), &gaddr) )
- {
- if ( hvm_copy_to_guest_phys(gaddr, NULL, HVM_VM86_TSS_SIZE, v) !=
- HVMCOPY_okay )
- printk("Unable to zero VM86 TSS area\n");
- d->arch.hvm_domain.params[HVM_PARAM_VM86_TSS_SIZED] =
- VM86_TSS_UPDATED | ((uint64_t)HVM_VM86_TSS_SIZE << 32) | gaddr;
- if ( pvh_add_mem_range(d, gaddr, gaddr + HVM_VM86_TSS_SIZE,
- E820_RESERVED) )
- printk("Unable to set VM86 TSS as reserved in the memory map\n");
- }
- else
- printk("Unable to allocate VM86 TSS area\n");
-
- /* Steal some more RAM for the identity page tables. */
- if ( pvh_steal_ram(d, PAGE_SIZE, PAGE_SIZE, GB(4), &gaddr) )
- {
- printk("Unable to find memory to stash the identity page tables\n");
- return -ENOMEM;
- }
-
- /*
- * 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.
- */
- ident_pt = map_domain_gfn(p2m_get_hostp2m(d), _gfn(PFN_DOWN(gaddr)),
- &mfn, &p2mt, 0, &rc);
- if ( ident_pt == NULL )
- {
- printk("Unable to map identity page tables\n");
- return -ENOMEM;
- }
- write_32bit_pse_identmap(ident_pt);
- unmap_domain_page(ident_pt);
- put_page(mfn_to_page(mfn_x(mfn)));
- d->arch.hvm_domain.params[HVM_PARAM_IDENT_PT] = gaddr;
- if ( pvh_add_mem_range(d, gaddr, gaddr + PAGE_SIZE, E820_RESERVED) )
- printk("Unable to set identity page tables as reserved in the
memory map\n");
-
- return 0;
-}
-
-/* Assign the low 1MB to Dom0. */
-static void __init pvh_steal_low_ram(struct domain *d, unsigned long start,
- unsigned long nr_pages)
-{
- unsigned long mfn;
-
- ASSERT(start + nr_pages <= PFN_DOWN(MB(1)));
-
- for ( mfn = start; mfn < start + nr_pages; mfn++ )
- {
- struct page_info *pg = mfn_to_page(mfn);
- int rc;
-
- rc = unshare_xen_page_with_guest(pg, dom_io);
- if ( rc )
- {
- printk("Unable to unshare Xen mfn %#lx: %d\n", mfn, rc);
- continue;
- }
-
- share_xen_page_with_guest(pg, d, XENSHARE_writable);
- rc = guest_physmap_add_entry(d, _gfn(mfn), _mfn(mfn), 0, p2m_ram_rw);
- if ( rc )
- printk("Unable to add mfn %#lx to p2m: %d\n", mfn, rc);
- }
-}
-
-static __init void pvh_setup_e820(struct domain *d, unsigned long nr_pages)
-{
- struct e820entry *entry, *entry_guest;
- unsigned int i;
- unsigned long pages, cur_pages = 0;
- uint64_t start, end;
-
- /*
- * Craft the e820 memory map for Dom0 based on the hardware e820 map.
- */
- d->arch.e820 = xzalloc_array(struct e820entry, e820.nr_map);
- if ( !d->arch.e820 )
- panic("Unable to allocate memory for Dom0 e820 map");
- entry_guest = d->arch.e820;
-
- /* Clamp e820 memory map to match the memory assigned to Dom0 */
- for ( i = 0, entry = e820.map; i < e820.nr_map; i++, entry++ )
- {
- if ( entry->type != E820_RAM )
- {
- *entry_guest = *entry;
- goto next;
- }
-
- if ( nr_pages == cur_pages )
- {
- /*
- * We already have all the assigned memory,
- * skip this entry
- */
- continue;
- }
-
- /*
- * Make sure the start and length are aligned to PAGE_SIZE, because
- * that's the minimum granularity of the 2nd stage translation. Since
- * the p2m code uses PAGE_ORDER_4K internally, also use it here in
- * order to prevent this code from getting out of sync.
- */
- start = ROUNDUP(entry->addr, PAGE_SIZE << PAGE_ORDER_4K);
- end = (entry->addr + entry->size) &
- ~((PAGE_SIZE << PAGE_ORDER_4K) - 1);
- if ( start >= end )
- continue;
-
- entry_guest->type = E820_RAM;
- entry_guest->addr = start;
- entry_guest->size = end - start;
- pages = PFN_DOWN(entry_guest->size);
- if ( (cur_pages + pages) > nr_pages )
- {
- /* Truncate region */
- entry_guest->size = (nr_pages - cur_pages) << PAGE_SHIFT;
- cur_pages = nr_pages;
- }
- else
- {
- cur_pages += pages;
- }
- next:
- d->arch.nr_e820++;
- entry_guest++;
- }
- ASSERT(cur_pages == nr_pages);
- ASSERT(d->arch.nr_e820 <= e820.nr_map);
-}
-
-static int __init pvh_setup_p2m(struct domain *d)
-{
- struct vcpu *v = d->vcpu[0];
- unsigned long nr_pages;
- unsigned int i;
- int rc;
- bool preempted;
-#define MB1_PAGES PFN_DOWN(MB(1))
-
- nr_pages = compute_dom0_nr_pages(d, NULL, 0);
-
- pvh_setup_e820(d, nr_pages);
- do {
- preempted = false;
- paging_set_allocation(d, dom0_paging_pages(d, nr_pages),
- &preempted);
- process_pending_softirqs();
- } while ( preempted );
-
- /*
- * Memory below 1MB is identity mapped.
- * NB: this only makes sense when booted from legacy BIOS.
- */
- rc = modify_identity_mmio(d, 0, MB1_PAGES, true);
- if ( rc )
- {
- printk("Failed to identity map low 1MB: %d\n", rc);
- return rc;
- }
-
- /* Populate memory map. */
- for ( i = 0; i < d->arch.nr_e820; i++ )
- {
- unsigned long addr, size;
-
- if ( d->arch.e820[i].type != E820_RAM )
- continue;
-
- addr = PFN_DOWN(d->arch.e820[i].addr);
- size = PFN_DOWN(d->arch.e820[i].size);
-
- if ( addr >= MB1_PAGES )
- rc = pvh_populate_memory_range(d, addr, size);
- else
- {
- ASSERT(addr + size < MB1_PAGES);
- pvh_steal_low_ram(d, addr, size);
- }
-
- if ( rc )
- return rc;
- }
-
- if ( cpu_has_vmx && paging_mode_hap(d) && !vmx_unrestricted_guest(v) )
- {
- /*
- * Since Dom0 cannot be migrated, we will only setup the
- * unrestricted guest helpers if they are needed by the current
- * hardware we are running on.
- */
- rc = pvh_setup_vmx_realmode_helpers(d);
- if ( rc )
- return rc;
- }
-
- return 0;
-#undef MB1_PAGES
-}
-
-static int __init pvh_load_kernel(struct domain *d, const module_t *image,
- unsigned long image_headroom,
- module_t *initrd, void *image_base,
- char *cmdline, paddr_t *entry,
- paddr_t *start_info_addr)
-{
- void *image_start = image_base + image_headroom;
- unsigned long image_len = image->mod_end;
- struct elf_binary elf;
- struct elf_dom_parms parms;
- paddr_t last_addr;
- struct hvm_start_info start_info = { 0 };
- struct hvm_modlist_entry mod = { 0 };
- struct vcpu *v = d->vcpu[0];
- int rc;
-
- if ( (rc = bzimage_parse(image_base, &image_start, &image_len)) != 0 )
- {
- printk("Error trying to detect bz compressed kernel\n");
- return rc;
- }
-
- if ( (rc = elf_init(&elf, image_start, image_len)) != 0 )
- {
- printk("Unable to init ELF\n");
- return rc;
- }
-#ifdef VERBOSE
- elf_set_verbose(&elf);
-#endif
- elf_parse_binary(&elf);
- if ( (rc = elf_xen_parse(&elf, &parms)) != 0 )
- {
- printk("Unable to parse kernel for ELFNOTES\n");
- return rc;
- }
-
- if ( parms.phys_entry == UNSET_ADDR32 )
- {
- printk("Unable to find XEN_ELFNOTE_PHYS32_ENTRY address\n");
- return -EINVAL;
- }
-
- printk("OS: %s version: %s loader: %s bitness: %s\n", parms.guest_os,
- parms.guest_ver, parms.loader,
- elf_64bit(&elf) ? "64-bit" : "32-bit");
-
- /* Copy the OS image and free temporary buffer. */
- elf.dest_base = (void *)(parms.virt_kstart - parms.virt_base);
- elf.dest_size = parms.virt_kend - parms.virt_kstart;
-
- elf_set_vcpu(&elf, v);
- rc = elf_load_binary(&elf);
- if ( rc < 0 )
- {
- printk("Failed to load kernel: %d\n", rc);
- printk("Xen dom0 kernel broken ELF: %s\n", elf_check_broken(&elf));
- return rc;
- }
-
- last_addr = ROUNDUP(parms.virt_kend - parms.virt_base, PAGE_SIZE);
-
- if ( initrd != NULL )
- {
- rc = hvm_copy_to_guest_phys(last_addr, mfn_to_virt(initrd->mod_start),
- initrd->mod_end, v);
- if ( rc )
- {
- printk("Unable to copy initrd to guest\n");
- return rc;
- }
-
- mod.paddr = last_addr;
- mod.size = initrd->mod_end;
- last_addr += ROUNDUP(initrd->mod_end, PAGE_SIZE);
- }
-
- /* Free temporary buffers. */
- discard_initial_images();
-
- if ( cmdline != NULL )
- {
- rc = hvm_copy_to_guest_phys(last_addr, cmdline, strlen(cmdline) + 1,
v);
- if ( rc )
- {
- printk("Unable to copy guest command line\n");
- return rc;
- }
- start_info.cmdline_paddr = last_addr;
- /*
- * Round up to 32/64 bits (depending on the guest kernel bitness) so
- * the modlist/start_info is aligned.
- */
- last_addr += ROUNDUP(strlen(cmdline) + 1, elf_64bit(&elf) ? 8 : 4);
- }
- if ( initrd != NULL )
- {
- rc = hvm_copy_to_guest_phys(last_addr, &mod, sizeof(mod), v);
- if ( rc )
- {
- printk("Unable to copy guest modules\n");
- return rc;
- }
- start_info.modlist_paddr = last_addr;
- start_info.nr_modules = 1;
- last_addr += sizeof(mod);
- }
-
- start_info.magic = XEN_HVM_START_MAGIC_VALUE;
- start_info.flags = SIF_PRIVILEGED | SIF_INITDOMAIN;
- rc = hvm_copy_to_guest_phys(last_addr, &start_info, sizeof(start_info), v);
- if ( rc )
- {
- printk("Unable to copy start info to guest\n");
- return rc;
- }
-
- *entry = parms.phys_entry;
- *start_info_addr = last_addr;
-
- return 0;
-}
-
-static int __init pvh_setup_cpus(struct domain *d, paddr_t entry,
- paddr_t start_info)
-{
- struct vcpu *v = d->vcpu[0];
- unsigned int cpu, i;
- int rc;
- /*
- * This sets the vCPU state according to the state described in
- * docs/misc/hvmlite.markdown.
- */
- vcpu_hvm_context_t cpu_ctx = {
- .mode = VCPU_HVM_MODE_32B,
- .cpu_regs.x86_32.ebx = start_info,
- .cpu_regs.x86_32.eip = entry,
- .cpu_regs.x86_32.cr0 = X86_CR0_PE | X86_CR0_ET,
- .cpu_regs.x86_32.cs_limit = ~0u,
- .cpu_regs.x86_32.ds_limit = ~0u,
- .cpu_regs.x86_32.ss_limit = ~0u,
- .cpu_regs.x86_32.tr_limit = 0x67,
- .cpu_regs.x86_32.cs_ar = 0xc9b,
- .cpu_regs.x86_32.ds_ar = 0xc93,
- .cpu_regs.x86_32.ss_ar = 0xc93,
- .cpu_regs.x86_32.tr_ar = 0x8b,
- };
-
- cpu = v->processor;
- for ( i = 1; i < d->max_vcpus; i++ )
- {
- cpu = cpumask_cycle(cpu, &dom0_cpus);
- setup_dom0_vcpu(d, i, cpu);
- }
-
- rc = arch_set_info_hvm_guest(v, &cpu_ctx);
- if ( rc )
- {
- printk("Unable to setup Dom0 BSP context: %d\n", rc);
- return rc;
- }
-
- rc = setup_permissions(d);
- if ( rc )
- {
- panic("Unable to setup Dom0 permissions: %d\n", rc);
- return rc;
- }
-
- update_domain_wallclock_time(d);
-
- clear_bit(_VPF_down, &v->pause_flags);
-
- return 0;
-}
-
-static int __init acpi_count_intr_ovr(struct acpi_subtable_header *header,
- const unsigned long end)
-{
-
- acpi_intr_overrides++;
- return 0;
-}
-
-static int __init acpi_set_intr_ovr(struct acpi_subtable_header *header,
- const unsigned long end)
-{
- const struct acpi_madt_interrupt_override *intr =
- container_of(header, struct acpi_madt_interrupt_override, header);
-
- *intsrcovr = *intr;
- intsrcovr++;
-
- return 0;
-}
-
-static int __init acpi_count_nmi_src(struct acpi_subtable_header *header,
- const unsigned long end)
-{
-
- acpi_nmi_sources++;
- return 0;
-}
-
-static int __init acpi_set_nmi_src(struct acpi_subtable_header *header,
- const unsigned long end)
-{
- const struct acpi_madt_nmi_source *src =
- container_of(header, struct acpi_madt_nmi_source, header);
-
- *nmisrc = *src;
- nmisrc++;
-
- return 0;
-}
-
-static int __init pvh_setup_acpi_madt(struct domain *d, paddr_t *addr)
-{
- struct acpi_table_madt *madt;
- struct acpi_table_header *table;
- struct acpi_madt_io_apic *io_apic;
- struct acpi_madt_local_x2apic *x2apic;
- acpi_status status;
- unsigned long size;
- unsigned int i, max_vcpus;
- int rc;
-
- /* Count number of interrupt overrides in the MADT. */
- acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
- acpi_count_intr_ovr, UINT_MAX);
-
- /* Count number of NMI sources in the MADT. */
- acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_count_nmi_src,
- UINT_MAX);
-
- max_vcpus = dom0_max_vcpus();
- /* Calculate the size of the crafted MADT. */
- size = sizeof(*madt);
- /*
- * FIXME: the current vIO-APIC code just supports one IO-APIC instance
- * per domain. This must be fixed in order to provide the same amount of
- * IO APICs as available on bare metal.
- */
- size += sizeof(*io_apic);
- size += sizeof(*intsrcovr) * acpi_intr_overrides;
- size += sizeof(*nmisrc) * acpi_nmi_sources;
- size += sizeof(*x2apic) * max_vcpus;
-
- madt = xzalloc_bytes(size);
- if ( !madt )
- {
- printk("Unable to allocate memory for MADT table\n");
- rc = -ENOMEM;
- goto out;
- }
-
- /* Copy the native MADT table header. */
- status = acpi_get_table(ACPI_SIG_MADT, 0, &table);
- if ( !ACPI_SUCCESS(status) )
- {
- printk("Failed to get MADT ACPI table, aborting.\n");
- rc = -EINVAL;
- goto out;
- }
- madt->header = *table;
- madt->address = APIC_DEFAULT_PHYS_BASE;
- /*
- * NB: this is currently set to 4, which is the revision in the ACPI
- * spec 6.1. Sadly ACPICA doesn't provide revision numbers for the
- * tables described in the headers.
- */
- madt->header.revision = min_t(unsigned char, table->revision, 4);
-
- /*
- * Setup the IO APIC entry.
- * FIXME: the current vIO-APIC code just supports one IO-APIC instance
- * per domain. This must be fixed in order to provide the same amount of
- * IO APICs as available on bare metal, and with the same IDs as found in
- * the native IO APIC MADT entries.
- */
- if ( nr_ioapics > 1 )
- printk("WARNING: found %d IO APICs, Dom0 will only have access to 1
emulated IO APIC\n",
- nr_ioapics);
- io_apic = (void *)(madt + 1);
- io_apic->header.type = ACPI_MADT_TYPE_IO_APIC;
- io_apic->header.length = sizeof(*io_apic);
- io_apic->id = domain_vioapic(d)->id;
- io_apic->address = VIOAPIC_DEFAULT_BASE_ADDRESS;
-
- x2apic = (void *)(io_apic + 1);
- for ( i = 0; i < max_vcpus; i++ )
- {
- x2apic->header.type = ACPI_MADT_TYPE_LOCAL_X2APIC;
- x2apic->header.length = sizeof(*x2apic);
- x2apic->uid = i;
- x2apic->local_apic_id = i * 2;
- x2apic->lapic_flags = ACPI_MADT_ENABLED;
- x2apic++;
- }
-
- /* Setup interrupt overrides. */
- intsrcovr = (void *)x2apic;
- acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_set_intr_ovr,
- acpi_intr_overrides);
-
- /* Setup NMI sources. */
- nmisrc = (void *)intsrcovr;
- acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_set_nmi_src,
- acpi_nmi_sources);
-
- ASSERT(((void *)nmisrc - (void *)madt) == size);
- madt->header.length = size;
- /*
- * Calling acpi_tb_checksum here is a layering violation, but
- * introducing a wrapper for such simple usage seems overkill.
- */
- madt->header.checksum -= acpi_tb_checksum(ACPI_CAST_PTR(u8, madt), size);
-
- /* Place the new MADT in guest memory space. */
- if ( pvh_steal_ram(d, size, 0, GB(4), addr) )
- {
- printk("Unable to find allocate guest RAM for MADT\n");
- rc = -ENOMEM;
- goto out;
- }
-
- /* Mark this region as E820_ACPI. */
- if ( pvh_add_mem_range(d, *addr, *addr + size, E820_ACPI) )
- printk("Unable to add MADT region to memory map\n");
-
- rc = hvm_copy_to_guest_phys(*addr, madt, size, d->vcpu[0]);
- if ( rc )
- {
- printk("Unable to copy MADT into guest memory\n");
- goto out;
- }
-
- rc = 0;
-
- out:
- xfree(madt);
-
- return rc;
-}
-
-static bool __init acpi_memory_banned(unsigned long address,
- unsigned long size)
-{
- unsigned long mfn, nr_pages, i;
-
- mfn = PFN_DOWN(address);
- nr_pages = PFN_UP((address & ~PAGE_MASK) + size);
- for ( i = 0 ; i < nr_pages; i++ )
- if ( !page_is_ram_type(mfn + i, RAM_TYPE_RESERVED) &&
- !page_is_ram_type(mfn + i, RAM_TYPE_ACPI) )
- return true;
-
- return false;
-}
-
-static bool __init pvh_acpi_table_allowed(const char *sig)
-{
- static const char __initconst banned_tables[][ACPI_NAME_SIZE] = {
- ACPI_SIG_HPET, ACPI_SIG_SLIT, ACPI_SIG_SRAT, ACPI_SIG_MPST,
- ACPI_SIG_PMTT, ACPI_SIG_MADT, ACPI_SIG_DMAR};
- unsigned int i;
-
- for ( i = 0 ; i < ARRAY_SIZE(banned_tables); i++ )
- if ( strncmp(sig, banned_tables[i], ACPI_NAME_SIZE) == 0 )
- return false;
-
- /* Make sure table doesn't reside in a RAM region. */
- if ( acpi_memory_banned(acpi_gbl_root_table_list.tables[i].address,
- acpi_gbl_root_table_list.tables[i].length) )
- {
- printk("Skipping table %.4s because resides in a non-ACPI,
non-reserved region\n",
- sig);
- return false;
- }
-
- return true;
-}
-
-static int __init pvh_setup_acpi_xsdt(struct domain *d, paddr_t madt_addr,
- paddr_t *addr)
-{
- struct acpi_table_xsdt *xsdt;
- struct acpi_table_header *table;
- struct acpi_table_rsdp *rsdp;
- unsigned long size = sizeof(*xsdt);
- unsigned int i, j, num_tables = 0;
- paddr_t xsdt_paddr;
- int rc;
-
- /*
- * Restore original DMAR table signature, we are going to filter it from
- * the new XSDT that is presented to the guest, so it is no longer
- * necessary to have it's signature zapped.
- */
- acpi_dmar_reinstate();
-
- /* Count the number of tables that will be added to the XSDT. */
- for( i = 0; i < acpi_gbl_root_table_list.count; i++ )
- {
- const char *sig = acpi_gbl_root_table_list.tables[i].signature.ascii;
-
- if ( pvh_acpi_table_allowed(sig) )
- num_tables++;
- }
-
- /*
- * No need to add or subtract anything because struct acpi_table_xsdt
- * includes one array slot already, and we have filtered out the original
- * MADT and we are going to add a custom built MADT.
- */
- size += num_tables * sizeof(xsdt->table_offset_entry[0]);
-
- xsdt = xzalloc_bytes(size);
- if ( !xsdt )
- {
- printk("Unable to allocate memory for XSDT table\n");
- rc = -ENOMEM;
- goto out;
- }
-
- /* Copy the native XSDT table header. */
- rsdp = acpi_os_map_memory(acpi_os_get_root_pointer(), sizeof(*rsdp));
- if ( !rsdp )
- {
- printk("Unable to map RSDP\n");
- rc = -EINVAL;
- goto out;
- }
- xsdt_paddr = rsdp->xsdt_physical_address;
- acpi_os_unmap_memory(rsdp, sizeof(*rsdp));
- table = acpi_os_map_memory(xsdt_paddr, sizeof(*table));
- if ( !table )
- {
- printk("Unable to map XSDT\n");
- rc = -EINVAL;
- goto out;
- }
- xsdt->header = *table;
- acpi_os_unmap_memory(table, sizeof(*table));
-
- /* Add the custom MADT. */
- xsdt->table_offset_entry[0] = madt_addr;
-
- /* Copy the addresses of the rest of the allowed tables. */
- for( i = 0, j = 1; i < acpi_gbl_root_table_list.count; i++ )
- {
- const char *sig = acpi_gbl_root_table_list.tables[i].signature.ascii;
-
- if ( pvh_acpi_table_allowed(sig) )
- xsdt->table_offset_entry[j++] =
- acpi_gbl_root_table_list.tables[i].address;
- }
-
- xsdt->header.revision = 1;
- xsdt->header.length = size;
- /*
- * Calling acpi_tb_checksum here is a layering violation, but
- * introducing a wrapper for such simple usage seems overkill.
- */
- xsdt->header.checksum -= acpi_tb_checksum(ACPI_CAST_PTR(u8, xsdt), size);
-
- /* Place the new XSDT in guest memory space. */
- if ( pvh_steal_ram(d, size, 0, GB(4), addr) )
- {
- printk("Unable to find guest RAM for XSDT\n");
- rc = -ENOMEM;
- goto out;
- }
-
- /* Mark this region as E820_ACPI. */
- if ( pvh_add_mem_range(d, *addr, *addr + size, E820_ACPI) )
- printk("Unable to add XSDT region to memory map\n");
-
- rc = hvm_copy_to_guest_phys(*addr, xsdt, size, d->vcpu[0]);
- if ( rc )
- {
- printk("Unable to copy XSDT into guest memory\n");
- goto out;
- }
-
- rc = 0;
-
- out:
- xfree(xsdt);
-
- return rc;
-}
-
-static int __init pvh_setup_acpi(struct domain *d, paddr_t start_info)
-{
- unsigned long pfn, nr_pages;
- paddr_t madt_paddr, xsdt_paddr, rsdp_paddr;
- unsigned int i;
- int rc;
- struct acpi_table_rsdp *native_rsdp, rsdp = {
- .signature = ACPI_SIG_RSDP,
- .revision = 2,
- .length = sizeof(rsdp),
- };
-
-
- /* Scan top-level tables and add their regions to the guest memory map. */
- for( i = 0; i < acpi_gbl_root_table_list.count; i++ )
- {
- const char *sig = acpi_gbl_root_table_list.tables[i].signature.ascii;
- unsigned long addr = acpi_gbl_root_table_list.tables[i].address;
- unsigned long size = acpi_gbl_root_table_list.tables[i].length;
-
- /*
- * Make sure the original MADT is also mapped, so that Dom0 can
- * properly access the data returned by _MAT methods in case it's
- * re-using MADT memory.
- */
- if ( strncmp(sig, ACPI_SIG_MADT, ACPI_NAME_SIZE)
- ? pvh_acpi_table_allowed(sig)
- : !acpi_memory_banned(addr, size) )
- pvh_add_mem_range(d, addr, addr + size, E820_ACPI);
- }
-
- /* Identity map ACPI e820 regions. */
- for ( i = 0; i < d->arch.nr_e820; i++ )
- {
- if ( d->arch.e820[i].type != E820_ACPI &&
- d->arch.e820[i].type != E820_NVS )
- continue;
-
- pfn = PFN_DOWN(d->arch.e820[i].addr);
- nr_pages = PFN_UP((d->arch.e820[i].addr & ~PAGE_MASK) +
- d->arch.e820[i].size);
-
- rc = modify_identity_mmio(d, pfn, nr_pages, true);
- if ( rc )
- {
- printk("Failed to map ACPI region [%#lx, %#lx) into Dom0 memory
map\n",
- pfn, pfn + nr_pages);
- return rc;
- }
- }
-
- rc = pvh_setup_acpi_madt(d, &madt_paddr);
- if ( rc )
- return rc;
-
- rc = pvh_setup_acpi_xsdt(d, madt_paddr, &xsdt_paddr);
- if ( rc )
- return rc;
-
- /* Craft a custom RSDP. */
- native_rsdp = acpi_os_map_memory(acpi_os_get_root_pointer(), sizeof(rsdp));
- if ( !native_rsdp )
- {
- printk("Failed to map native RSDP\n");
- return -ENOMEM;
- }
- memcpy(rsdp.oem_id, native_rsdp->oem_id, sizeof(rsdp.oem_id));
- acpi_os_unmap_memory(native_rsdp, sizeof(rsdp));
- rsdp.xsdt_physical_address = xsdt_paddr;
- /*
- * Calling acpi_tb_checksum here is a layering violation, but
- * introducing a wrapper for such simple usage seems overkill.
- */
- rsdp.checksum -= acpi_tb_checksum(ACPI_CAST_PTR(u8, &rsdp),
- ACPI_RSDP_REV0_SIZE);
- rsdp.extended_checksum -= acpi_tb_checksum(ACPI_CAST_PTR(u8, &rsdp),
- sizeof(rsdp));
-
- /*
- * Place the new RSDP in guest memory space.
- *
- * NB: this RSDP is not going to replace the original RSDP, which should
- * still be accessible to the guest. However that RSDP is going to point to
- * the native RSDT, and should not be used for the Dom0 kernel's boot
- * purposes (we keep it visible for post boot access).
- */
- if ( pvh_steal_ram(d, sizeof(rsdp), 0, GB(4), &rsdp_paddr) )
- {
- printk("Unable to allocate guest RAM for RSDP\n");
- return -ENOMEM;
- }
-
- /* Mark this region as E820_ACPI. */
- if ( pvh_add_mem_range(d, rsdp_paddr, rsdp_paddr + sizeof(rsdp),
- E820_ACPI) )
- printk("Unable to add RSDP region to memory map\n");
-
- /* Copy RSDP into guest memory. */
- rc = hvm_copy_to_guest_phys(rsdp_paddr, &rsdp, sizeof(rsdp), d->vcpu[0]);
- if ( rc )
- {
- printk("Unable to copy RSDP into guest memory\n");
- return rc;
- }
-
- /* Copy RSDP address to start_info. */
- rc = hvm_copy_to_guest_phys(start_info +
- offsetof(struct hvm_start_info, rsdp_paddr),
- &rsdp_paddr,
- sizeof(((struct hvm_start_info *)
- 0)->rsdp_paddr),
- d->vcpu[0]);
- if ( rc )
- {
- printk("Unable to copy RSDP into guest memory\n");
- return rc;
- }
-
- return 0;
-}
-
-static int __init construct_dom0_pvh(struct domain *d, const module_t *image,
- unsigned long image_headroom,
- module_t *initrd,
- void *(*bootstrap_map)(const module_t *),
- char *cmdline)
-{
- paddr_t entry, start_info;
- int rc;
-
- printk("** Building a PVH Dom0 **\n");
-
- iommu_hwdom_init(d);
-
- rc = pvh_setup_p2m(d);
- if ( rc )
- {
- printk("Failed to setup Dom0 physical memory map\n");
- return rc;
- }
-
- rc = pvh_load_kernel(d, image, image_headroom, initrd,
bootstrap_map(image),
- cmdline, &entry, &start_info);
- if ( rc )
- {
- printk("Failed to load Dom0 kernel\n");
- return rc;
- }
-
- rc = pvh_setup_cpus(d, entry, start_info);
- if ( rc )
- {
- printk("Failed to setup Dom0 CPUs: %d\n", rc);
- return rc;
- }
-
- rc = pvh_setup_acpi(d, start_info);
- if ( rc )
- {
- printk("Failed to setup Dom0 ACPI tables: %d\n", rc);
- return rc;
- }
-
- panic("Building a PVHv2 Dom0 is not yet supported.");
- return 0;
-}
-
int __init construct_dom0(struct domain *d, const module_t *image,
unsigned long image_headroom, module_t *initrd,
void *(*bootstrap_map)(const module_t *),
diff --git a/xen/arch/x86/domain_build.h b/xen/arch/x86/domain_build.h
index 403b90b77e..e8fc0ff4d7 100644
--- a/xen/arch/x86/domain_build.h
+++ b/xen/arch/x86/domain_build.h
@@ -19,6 +19,14 @@ int construct_dom0_pv(
void *(*bootstrap_map)(const module_t *),
char *cmdline);
+int construct_dom0_pvh(struct domain *d, const module_t *image,
+ unsigned long image_headroom,
+ module_t *initrd,
+ void *(*bootstrap_map)(const module_t *),
+ char *cmdline);
+unsigned long dom0_paging_pages(const struct domain *d,
+ unsigned long nr_pages);
+
#endif /* _DOMAIN_BUILD_H_ */
/*
diff --git a/xen/arch/x86/domain_build_pvh.c b/xen/arch/x86/domain_build_pvh.c
new file mode 100644
index 0000000000..6cd3ff2ef2
--- /dev/null
+++ b/xen/arch/x86/domain_build_pvh.c
@@ -0,0 +1,1097 @@
+/******************************************************************************
+ * domain_build_pvh.c
+ */
+
+#include <xen/acpi.h>
+#include <xen/init.h>
+#include <xen/libelf.h>
+#include <xen/multiboot.h>
+#include <xen/softirq.h>
+
+#include <acpi/actables.h>
+
+#include <asm/bzimage.h>
+#include <asm/hvm/support.h>
+#include <asm/io_apic.h>
+#include <asm/p2m.h>
+#include <asm/paging.h>
+#include <asm/setup.h>
+
+#include <public/arch-x86/hvm/start_info.h>
+#include <public/hvm/hvm_info_table.h>
+#include <public/hvm/hvm_vcpu.h>
+
+#include "domain_build.h"
+
+/*
+ * Have the TSS cover the ISA port range, which makes it
+ * - 104 bytes base structure
+ * - 32 bytes interrupt redirection bitmap
+ * - 128 bytes I/O bitmap
+ * - one trailing byte
+ * or a total of 265 bytes.
+ *
+ * NB: as PVHv2 Dom0 doesn't have legacy devices (ISA), it shouldn't have any
+ * business in accessing the ISA port range, much less in real mode, and due to
+ * the lack of firmware it shouldn't also execute any INT instruction. This is
+ * done just for consistency with what hvmloader does.
+ */
+#define HVM_VM86_TSS_SIZE 265
+
+static unsigned int __initdata acpi_intr_overrides;
+static struct acpi_madt_interrupt_override __initdata *intsrcovr;
+
+static unsigned int __initdata acpi_nmi_sources;
+static struct acpi_madt_nmi_source __initdata *nmisrc;
+
+static int __init modify_identity_mmio(struct domain *d, unsigned long pfn,
+ unsigned long nr_pages, const bool map)
+{
+ int rc;
+
+ for ( ; ; )
+ {
+ rc = (map ? map_mmio_regions : unmap_mmio_regions)
+ (d, _gfn(pfn), nr_pages, _mfn(pfn));
+ if ( rc == 0 )
+ break;
+ if ( rc < 0 )
+ {
+ printk(XENLOG_WARNING
+ "Failed to identity %smap [%#lx,%#lx) for d%d: %d\n",
+ map ? "" : "un", pfn, pfn + nr_pages, d->domain_id, rc);
+ break;
+ }
+ nr_pages -= rc;
+ pfn += rc;
+ process_pending_softirqs();
+ }
+
+ return rc;
+}
+
+/* Populate a HVM memory range using the biggest possible order. */
+static int __init pvh_populate_memory_range(struct domain *d,
+ unsigned long start,
+ unsigned long nr_pages)
+{
+ unsigned int order, i = 0;
+ struct page_info *page;
+ int rc;
+#define MAP_MAX_ITER 64
+
+ order = MAX_ORDER;
+ while ( nr_pages != 0 )
+ {
+ unsigned int range_order = get_order_from_pages(nr_pages + 1);
+
+ order = min(range_order ? range_order - 1 : 0, order);
+ page = alloc_domheap_pages(d, order, memflags);
+ if ( page == NULL )
+ {
+ if ( order == 0 && memflags )
+ {
+ /* Try again without any memflags. */
+ memflags = 0;
+ order = MAX_ORDER;
+ continue;
+ }
+ if ( order == 0 )
+ {
+ printk("Unable to allocate memory with order 0!\n");
+ return -ENOMEM;
+ }
+ order--;
+ continue;
+ }
+
+ rc = guest_physmap_add_page(d, _gfn(start), _mfn(page_to_mfn(page)),
+ order);
+ if ( rc != 0 )
+ {
+ printk("Failed to populate memory: [%#lx,%lx): %d\n",
+ start, start + (1UL << order), rc);
+ return -ENOMEM;
+ }
+ start += 1UL << order;
+ nr_pages -= 1UL << order;
+ if ( (++i % MAP_MAX_ITER) == 0 )
+ process_pending_softirqs();
+ }
+
+ return 0;
+#undef MAP_MAX_ITER
+}
+
+/* Steal RAM from the end of a memory region. */
+static int __init pvh_steal_ram(struct domain *d, unsigned long size,
+ unsigned long align, paddr_t limit,
+ paddr_t *addr)
+{
+ unsigned int i = d->arch.nr_e820;
+
+ /*
+ * Alignment 0 should be set to 1, so it doesn't wrap around in the
+ * calculations below.
+ */
+ align = align ? : 1;
+ while ( i-- )
+ {
+ struct e820entry *entry = &d->arch.e820[i];
+
+ if ( entry->type != E820_RAM || entry->addr + entry->size > limit ||
+ entry->addr < MB(1) )
+ continue;
+
+ *addr = (entry->addr + entry->size - size) & ~(align - 1);
+ if ( *addr < entry->addr )
+ continue;
+
+ entry->size = *addr - entry->addr;
+ return 0;
+ }
+
+ return -ENOMEM;
+}
+
+/* NB: memory map must be sorted at all times for this to work correctly. */
+static int __init pvh_add_mem_range(struct domain *d, uint64_t s, uint64_t e,
+ unsigned int type)
+{
+ struct e820entry *map;
+ unsigned int i;
+
+ for ( i = 0; i < d->arch.nr_e820; i++ )
+ {
+ uint64_t rs = d->arch.e820[i].addr;
+ uint64_t re = rs + d->arch.e820[i].size;
+
+ if ( rs == e && d->arch.e820[i].type == type )
+ {
+ d->arch.e820[i].addr = s;
+ return 0;
+ }
+
+ if ( re == s && d->arch.e820[i].type == type &&
+ (i + 1 == d->arch.nr_e820 || d->arch.e820[i + 1].addr >= e) )
+ {
+ d->arch.e820[i].size += e - s;
+ return 0;
+ }
+
+ if ( rs >= e )
+ break;
+
+ if ( re > s )
+ return -EEXIST;
+ }
+
+ map = xzalloc_array(struct e820entry, d->arch.nr_e820 + 1);
+ if ( !map )
+ {
+ printk(XENLOG_WARNING "E820: out of memory to add region\n");
+ return -ENOMEM;
+ }
+
+ memcpy(map, d->arch.e820, i * sizeof(*d->arch.e820));
+ memcpy(map + i + 1, d->arch.e820 + i,
+ (d->arch.nr_e820 - i) * sizeof(*d->arch.e820));
+ map[i].addr = s;
+ map[i].size = e - s;
+ map[i].type = type;
+ xfree(d->arch.e820);
+ d->arch.e820 = map;
+ d->arch.nr_e820++;
+
+ return 0;
+}
+
+static int __init pvh_setup_vmx_realmode_helpers(struct domain *d)
+{
+ p2m_type_t p2mt;
+ uint32_t rc, *ident_pt;
+ mfn_t mfn;
+ paddr_t gaddr;
+ struct vcpu *v = d->vcpu[0];
+
+ /*
+ * Steal some space from the last RAM region below 4GB and use it to
+ * store the real-mode TSS. It needs to be aligned to 128 so that the
+ * TSS structure (which accounts for the first 104b) doesn't cross
+ * a page boundary.
+ */
+ if ( !pvh_steal_ram(d, HVM_VM86_TSS_SIZE, 128, GB(4), &gaddr) )
+ {
+ if ( hvm_copy_to_guest_phys(gaddr, NULL, HVM_VM86_TSS_SIZE, v) !=
+ HVMCOPY_okay )
+ printk("Unable to zero VM86 TSS area\n");
+ d->arch.hvm_domain.params[HVM_PARAM_VM86_TSS_SIZED] =
+ VM86_TSS_UPDATED | ((uint64_t)HVM_VM86_TSS_SIZE << 32) | gaddr;
+ if ( pvh_add_mem_range(d, gaddr, gaddr + HVM_VM86_TSS_SIZE,
+ E820_RESERVED) )
+ printk("Unable to set VM86 TSS as reserved in the memory map\n");
+ }
+ else
+ printk("Unable to allocate VM86 TSS area\n");
+
+ /* Steal some more RAM for the identity page tables. */
+ if ( pvh_steal_ram(d, PAGE_SIZE, PAGE_SIZE, GB(4), &gaddr) )
+ {
+ printk("Unable to find memory to stash the identity page tables\n");
+ return -ENOMEM;
+ }
+
+ /*
+ * 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.
+ */
+ ident_pt = map_domain_gfn(p2m_get_hostp2m(d), _gfn(PFN_DOWN(gaddr)),
+ &mfn, &p2mt, 0, &rc);
+ if ( ident_pt == NULL )
+ {
+ printk("Unable to map identity page tables\n");
+ return -ENOMEM;
+ }
+ write_32bit_pse_identmap(ident_pt);
+ unmap_domain_page(ident_pt);
+ put_page(mfn_to_page(mfn_x(mfn)));
+ d->arch.hvm_domain.params[HVM_PARAM_IDENT_PT] = gaddr;
+ if ( pvh_add_mem_range(d, gaddr, gaddr + PAGE_SIZE, E820_RESERVED) )
+ printk("Unable to set identity page tables as reserved in the
memory map\n");
+
+ return 0;
+}
+
+/* Assign the low 1MB to Dom0. */
+static void __init pvh_steal_low_ram(struct domain *d, unsigned long start,
+ unsigned long nr_pages)
+{
+ unsigned long mfn;
+
+ ASSERT(start + nr_pages <= PFN_DOWN(MB(1)));
+
+ for ( mfn = start; mfn < start + nr_pages; mfn++ )
+ {
+ struct page_info *pg = mfn_to_page(mfn);
+ int rc;
+
+ rc = unshare_xen_page_with_guest(pg, dom_io);
+ if ( rc )
+ {
+ printk("Unable to unshare Xen mfn %#lx: %d\n", mfn, rc);
+ continue;
+ }
+
+ share_xen_page_with_guest(pg, d, XENSHARE_writable);
+ rc = guest_physmap_add_entry(d, _gfn(mfn), _mfn(mfn), 0, p2m_ram_rw);
+ if ( rc )
+ printk("Unable to add mfn %#lx to p2m: %d\n", mfn, rc);
+ }
+}
+
+static __init void pvh_setup_e820(struct domain *d, unsigned long nr_pages)
+{
+ struct e820entry *entry, *entry_guest;
+ unsigned int i;
+ unsigned long pages, cur_pages = 0;
+ uint64_t start, end;
+
+ /*
+ * Craft the e820 memory map for Dom0 based on the hardware e820 map.
+ */
+ d->arch.e820 = xzalloc_array(struct e820entry, e820.nr_map);
+ if ( !d->arch.e820 )
+ panic("Unable to allocate memory for Dom0 e820 map");
+ entry_guest = d->arch.e820;
+
+ /* Clamp e820 memory map to match the memory assigned to Dom0 */
+ for ( i = 0, entry = e820.map; i < e820.nr_map; i++, entry++ )
+ {
+ if ( entry->type != E820_RAM )
+ {
+ *entry_guest = *entry;
+ goto next;
+ }
+
+ if ( nr_pages == cur_pages )
+ {
+ /*
+ * We already have all the assigned memory,
+ * skip this entry
+ */
+ continue;
+ }
+
+ /*
+ * Make sure the start and length are aligned to PAGE_SIZE, because
+ * that's the minimum granularity of the 2nd stage translation. Since
+ * the p2m code uses PAGE_ORDER_4K internally, also use it here in
+ * order to prevent this code from getting out of sync.
+ */
+ start = ROUNDUP(entry->addr, PAGE_SIZE << PAGE_ORDER_4K);
+ end = (entry->addr + entry->size) &
+ ~((PAGE_SIZE << PAGE_ORDER_4K) - 1);
+ if ( start >= end )
+ continue;
+
+ entry_guest->type = E820_RAM;
+ entry_guest->addr = start;
+ entry_guest->size = end - start;
+ pages = PFN_DOWN(entry_guest->size);
+ if ( (cur_pages + pages) > nr_pages )
+ {
+ /* Truncate region */
+ entry_guest->size = (nr_pages - cur_pages) << PAGE_SHIFT;
+ cur_pages = nr_pages;
+ }
+ else
+ {
+ cur_pages += pages;
+ }
+ next:
+ d->arch.nr_e820++;
+ entry_guest++;
+ }
+ ASSERT(cur_pages == nr_pages);
+ ASSERT(d->arch.nr_e820 <= e820.nr_map);
+}
+
+static int __init pvh_setup_p2m(struct domain *d)
+{
+ struct vcpu *v = d->vcpu[0];
+ unsigned long nr_pages;
+ unsigned int i;
+ int rc;
+ bool preempted;
+#define MB1_PAGES PFN_DOWN(MB(1))
+
+ nr_pages = compute_dom0_nr_pages(d, NULL, 0);
+
+ pvh_setup_e820(d, nr_pages);
+ do {
+ preempted = false;
+ paging_set_allocation(d, dom0_paging_pages(d, nr_pages),
+ &preempted);
+ process_pending_softirqs();
+ } while ( preempted );
+
+ /*
+ * Memory below 1MB is identity mapped.
+ * NB: this only makes sense when booted from legacy BIOS.
+ */
+ rc = modify_identity_mmio(d, 0, MB1_PAGES, true);
+ if ( rc )
+ {
+ printk("Failed to identity map low 1MB: %d\n", rc);
+ return rc;
+ }
+
+ /* Populate memory map. */
+ for ( i = 0; i < d->arch.nr_e820; i++ )
+ {
+ unsigned long addr, size;
+
+ if ( d->arch.e820[i].type != E820_RAM )
+ continue;
+
+ addr = PFN_DOWN(d->arch.e820[i].addr);
+ size = PFN_DOWN(d->arch.e820[i].size);
+
+ if ( addr >= MB1_PAGES )
+ rc = pvh_populate_memory_range(d, addr, size);
+ else
+ {
+ ASSERT(addr + size < MB1_PAGES);
+ pvh_steal_low_ram(d, addr, size);
+ }
+
+ if ( rc )
+ return rc;
+ }
+
+ if ( cpu_has_vmx && paging_mode_hap(d) && !vmx_unrestricted_guest(v) )
+ {
+ /*
+ * Since Dom0 cannot be migrated, we will only setup the
+ * unrestricted guest helpers if they are needed by the current
+ * hardware we are running on.
+ */
+ rc = pvh_setup_vmx_realmode_helpers(d);
+ if ( rc )
+ return rc;
+ }
+
+ return 0;
+#undef MB1_PAGES
+}
+
+static int __init pvh_load_kernel(struct domain *d, const module_t *image,
+ unsigned long image_headroom,
+ module_t *initrd, void *image_base,
+ char *cmdline, paddr_t *entry,
+ paddr_t *start_info_addr)
+{
+ void *image_start = image_base + image_headroom;
+ unsigned long image_len = image->mod_end;
+ struct elf_binary elf;
+ struct elf_dom_parms parms;
+ paddr_t last_addr;
+ struct hvm_start_info start_info = { 0 };
+ struct hvm_modlist_entry mod = { 0 };
+ struct vcpu *v = d->vcpu[0];
+ int rc;
+
+ if ( (rc = bzimage_parse(image_base, &image_start, &image_len)) != 0 )
+ {
+ printk("Error trying to detect bz compressed kernel\n");
+ return rc;
+ }
+
+ if ( (rc = elf_init(&elf, image_start, image_len)) != 0 )
+ {
+ printk("Unable to init ELF\n");
+ return rc;
+ }
+#ifdef VERBOSE
+ elf_set_verbose(&elf);
+#endif
+ elf_parse_binary(&elf);
+ if ( (rc = elf_xen_parse(&elf, &parms)) != 0 )
+ {
+ printk("Unable to parse kernel for ELFNOTES\n");
+ return rc;
+ }
+
+ if ( parms.phys_entry == UNSET_ADDR32 )
+ {
+ printk("Unable to find XEN_ELFNOTE_PHYS32_ENTRY address\n");
+ return -EINVAL;
+ }
+
+ printk("OS: %s version: %s loader: %s bitness: %s\n", parms.guest_os,
+ parms.guest_ver, parms.loader,
+ elf_64bit(&elf) ? "64-bit" : "32-bit");
+
+ /* Copy the OS image and free temporary buffer. */
+ elf.dest_base = (void *)(parms.virt_kstart - parms.virt_base);
+ elf.dest_size = parms.virt_kend - parms.virt_kstart;
+
+ elf_set_vcpu(&elf, v);
+ rc = elf_load_binary(&elf);
+ if ( rc < 0 )
+ {
+ printk("Failed to load kernel: %d\n", rc);
+ printk("Xen dom0 kernel broken ELF: %s\n", elf_check_broken(&elf));
+ return rc;
+ }
+
+ last_addr = ROUNDUP(parms.virt_kend - parms.virt_base, PAGE_SIZE);
+
+ if ( initrd != NULL )
+ {
+ rc = hvm_copy_to_guest_phys(last_addr, mfn_to_virt(initrd->mod_start),
+ initrd->mod_end, v);
+ if ( rc )
+ {
+ printk("Unable to copy initrd to guest\n");
+ return rc;
+ }
+
+ mod.paddr = last_addr;
+ mod.size = initrd->mod_end;
+ last_addr += ROUNDUP(initrd->mod_end, PAGE_SIZE);
+ }
+
+ /* Free temporary buffers. */
+ discard_initial_images();
+
+ if ( cmdline != NULL )
+ {
+ rc = hvm_copy_to_guest_phys(last_addr, cmdline, strlen(cmdline) + 1,
v);
+ if ( rc )
+ {
+ printk("Unable to copy guest command line\n");
+ return rc;
+ }
+ start_info.cmdline_paddr = last_addr;
+ /*
+ * Round up to 32/64 bits (depending on the guest kernel bitness) so
+ * the modlist/start_info is aligned.
+ */
+ last_addr += ROUNDUP(strlen(cmdline) + 1, elf_64bit(&elf) ? 8 : 4);
+ }
+ if ( initrd != NULL )
+ {
+ rc = hvm_copy_to_guest_phys(last_addr, &mod, sizeof(mod), v);
+ if ( rc )
+ {
+ printk("Unable to copy guest modules\n");
+ return rc;
+ }
+ start_info.modlist_paddr = last_addr;
+ start_info.nr_modules = 1;
+ last_addr += sizeof(mod);
+ }
+
+ start_info.magic = XEN_HVM_START_MAGIC_VALUE;
+ start_info.flags = SIF_PRIVILEGED | SIF_INITDOMAIN;
+ rc = hvm_copy_to_guest_phys(last_addr, &start_info, sizeof(start_info), v);
+ if ( rc )
+ {
+ printk("Unable to copy start info to guest\n");
+ return rc;
+ }
+
+ *entry = parms.phys_entry;
+ *start_info_addr = last_addr;
+
+ return 0;
+}
+
+static int __init pvh_setup_cpus(struct domain *d, paddr_t entry,
+ paddr_t start_info)
+{
+ struct vcpu *v = d->vcpu[0];
+ unsigned int cpu, i;
+ int rc;
+ /*
+ * This sets the vCPU state according to the state described in
+ * docs/misc/hvmlite.markdown.
+ */
+ vcpu_hvm_context_t cpu_ctx = {
+ .mode = VCPU_HVM_MODE_32B,
+ .cpu_regs.x86_32.ebx = start_info,
+ .cpu_regs.x86_32.eip = entry,
+ .cpu_regs.x86_32.cr0 = X86_CR0_PE | X86_CR0_ET,
+ .cpu_regs.x86_32.cs_limit = ~0u,
+ .cpu_regs.x86_32.ds_limit = ~0u,
+ .cpu_regs.x86_32.ss_limit = ~0u,
+ .cpu_regs.x86_32.tr_limit = 0x67,
+ .cpu_regs.x86_32.cs_ar = 0xc9b,
+ .cpu_regs.x86_32.ds_ar = 0xc93,
+ .cpu_regs.x86_32.ss_ar = 0xc93,
+ .cpu_regs.x86_32.tr_ar = 0x8b,
+ };
+
+ cpu = v->processor;
+ for ( i = 1; i < d->max_vcpus; i++ )
+ {
+ cpu = cpumask_cycle(cpu, &dom0_cpus);
+ setup_dom0_vcpu(d, i, cpu);
+ }
+
+ rc = arch_set_info_hvm_guest(v, &cpu_ctx);
+ if ( rc )
+ {
+ printk("Unable to setup Dom0 BSP context: %d\n", rc);
+ return rc;
+ }
+
+ rc = setup_permissions(d);
+ if ( rc )
+ {
+ panic("Unable to setup Dom0 permissions: %d\n", rc);
+ return rc;
+ }
+
+ update_domain_wallclock_time(d);
+
+ clear_bit(_VPF_down, &v->pause_flags);
+
+ return 0;
+}
+
+static int __init acpi_count_intr_ovr(struct acpi_subtable_header *header,
+ const unsigned long end)
+{
+
+ acpi_intr_overrides++;
+ return 0;
+}
+
+static int __init acpi_set_intr_ovr(struct acpi_subtable_header *header,
+ const unsigned long end)
+{
+ const struct acpi_madt_interrupt_override *intr =
+ container_of(header, struct acpi_madt_interrupt_override, header);
+
+ *intsrcovr = *intr;
+ intsrcovr++;
+
+ return 0;
+}
+
+static int __init acpi_count_nmi_src(struct acpi_subtable_header *header,
+ const unsigned long end)
+{
+
+ acpi_nmi_sources++;
+ return 0;
+}
+
+static int __init acpi_set_nmi_src(struct acpi_subtable_header *header,
+ const unsigned long end)
+{
+ const struct acpi_madt_nmi_source *src =
+ container_of(header, struct acpi_madt_nmi_source, header);
+
+ *nmisrc = *src;
+ nmisrc++;
+
+ return 0;
+}
+
+static int __init pvh_setup_acpi_madt(struct domain *d, paddr_t *addr)
+{
+ struct acpi_table_madt *madt;
+ struct acpi_table_header *table;
+ struct acpi_madt_io_apic *io_apic;
+ struct acpi_madt_local_x2apic *x2apic;
+ acpi_status status;
+ unsigned long size;
+ unsigned int i, max_vcpus;
+ int rc;
+
+ /* Count number of interrupt overrides in the MADT. */
+ acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
+ acpi_count_intr_ovr, UINT_MAX);
+
+ /* Count number of NMI sources in the MADT. */
+ acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_count_nmi_src,
+ UINT_MAX);
+
+ max_vcpus = dom0_max_vcpus();
+ /* Calculate the size of the crafted MADT. */
+ size = sizeof(*madt);
+ /*
+ * FIXME: the current vIO-APIC code just supports one IO-APIC instance
+ * per domain. This must be fixed in order to provide the same amount of
+ * IO APICs as available on bare metal.
+ */
+ size += sizeof(*io_apic);
+ size += sizeof(*intsrcovr) * acpi_intr_overrides;
+ size += sizeof(*nmisrc) * acpi_nmi_sources;
+ size += sizeof(*x2apic) * max_vcpus;
+
+ madt = xzalloc_bytes(size);
+ if ( !madt )
+ {
+ printk("Unable to allocate memory for MADT table\n");
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ /* Copy the native MADT table header. */
+ status = acpi_get_table(ACPI_SIG_MADT, 0, &table);
+ if ( !ACPI_SUCCESS(status) )
+ {
+ printk("Failed to get MADT ACPI table, aborting.\n");
+ rc = -EINVAL;
+ goto out;
+ }
+ madt->header = *table;
+ madt->address = APIC_DEFAULT_PHYS_BASE;
+ /*
+ * NB: this is currently set to 4, which is the revision in the ACPI
+ * spec 6.1. Sadly ACPICA doesn't provide revision numbers for the
+ * tables described in the headers.
+ */
+ madt->header.revision = min_t(unsigned char, table->revision, 4);
+
+ /*
+ * Setup the IO APIC entry.
+ * FIXME: the current vIO-APIC code just supports one IO-APIC instance
+ * per domain. This must be fixed in order to provide the same amount of
+ * IO APICs as available on bare metal, and with the same IDs as found in
+ * the native IO APIC MADT entries.
+ */
+ if ( nr_ioapics > 1 )
+ printk("WARNING: found %d IO APICs, Dom0 will only have access to 1
emulated IO APIC\n",
+ nr_ioapics);
+ io_apic = (void *)(madt + 1);
+ io_apic->header.type = ACPI_MADT_TYPE_IO_APIC;
+ io_apic->header.length = sizeof(*io_apic);
+ io_apic->id = domain_vioapic(d)->id;
+ io_apic->address = VIOAPIC_DEFAULT_BASE_ADDRESS;
+
+ x2apic = (void *)(io_apic + 1);
+ for ( i = 0; i < max_vcpus; i++ )
+ {
+ x2apic->header.type = ACPI_MADT_TYPE_LOCAL_X2APIC;
+ x2apic->header.length = sizeof(*x2apic);
+ x2apic->uid = i;
+ x2apic->local_apic_id = i * 2;
+ x2apic->lapic_flags = ACPI_MADT_ENABLED;
+ x2apic++;
+ }
+
+ /* Setup interrupt overrides. */
+ intsrcovr = (void *)x2apic;
+ acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_set_intr_ovr,
+ acpi_intr_overrides);
+
+ /* Setup NMI sources. */
+ nmisrc = (void *)intsrcovr;
+ acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_set_nmi_src,
+ acpi_nmi_sources);
+
+ ASSERT(((void *)nmisrc - (void *)madt) == size);
+ madt->header.length = size;
+ /*
+ * Calling acpi_tb_checksum here is a layering violation, but
+ * introducing a wrapper for such simple usage seems overkill.
+ */
+ madt->header.checksum -= acpi_tb_checksum(ACPI_CAST_PTR(u8, madt), size);
+
+ /* Place the new MADT in guest memory space. */
+ if ( pvh_steal_ram(d, size, 0, GB(4), addr) )
+ {
+ printk("Unable to find allocate guest RAM for MADT\n");
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ /* Mark this region as E820_ACPI. */
+ if ( pvh_add_mem_range(d, *addr, *addr + size, E820_ACPI) )
+ printk("Unable to add MADT region to memory map\n");
+
+ rc = hvm_copy_to_guest_phys(*addr, madt, size, d->vcpu[0]);
+ if ( rc )
+ {
+ printk("Unable to copy MADT into guest memory\n");
+ goto out;
+ }
+
+ rc = 0;
+
+ out:
+ xfree(madt);
+
+ return rc;
+}
+
+static bool __init acpi_memory_banned(unsigned long address,
+ unsigned long size)
+{
+ unsigned long mfn, nr_pages, i;
+
+ mfn = PFN_DOWN(address);
+ nr_pages = PFN_UP((address & ~PAGE_MASK) + size);
+ for ( i = 0 ; i < nr_pages; i++ )
+ if ( !page_is_ram_type(mfn + i, RAM_TYPE_RESERVED) &&
+ !page_is_ram_type(mfn + i, RAM_TYPE_ACPI) )
+ return true;
+
+ return false;
+}
+
+static bool __init pvh_acpi_table_allowed(const char *sig)
+{
+ static const char __initconst banned_tables[][ACPI_NAME_SIZE] = {
+ ACPI_SIG_HPET, ACPI_SIG_SLIT, ACPI_SIG_SRAT, ACPI_SIG_MPST,
+ ACPI_SIG_PMTT, ACPI_SIG_MADT, ACPI_SIG_DMAR};
+ unsigned int i;
+
+ for ( i = 0 ; i < ARRAY_SIZE(banned_tables); i++ )
+ if ( strncmp(sig, banned_tables[i], ACPI_NAME_SIZE) == 0 )
+ return false;
+
+ /* Make sure table doesn't reside in a RAM region. */
+ if ( acpi_memory_banned(acpi_gbl_root_table_list.tables[i].address,
+ acpi_gbl_root_table_list.tables[i].length) )
+ {
+ printk("Skipping table %.4s because resides in a non-ACPI,
non-reserved region\n",
+ sig);
+ return false;
+ }
+
+ return true;
+}
+
+static int __init pvh_setup_acpi_xsdt(struct domain *d, paddr_t madt_addr,
+ paddr_t *addr)
+{
+ struct acpi_table_xsdt *xsdt;
+ struct acpi_table_header *table;
+ struct acpi_table_rsdp *rsdp;
+ unsigned long size = sizeof(*xsdt);
+ unsigned int i, j, num_tables = 0;
+ paddr_t xsdt_paddr;
+ int rc;
+
+ /*
+ * Restore original DMAR table signature, we are going to filter it from
+ * the new XSDT that is presented to the guest, so it is no longer
+ * necessary to have it's signature zapped.
+ */
+ acpi_dmar_reinstate();
+
+ /* Count the number of tables that will be added to the XSDT. */
+ for( i = 0; i < acpi_gbl_root_table_list.count; i++ )
+ {
+ const char *sig = acpi_gbl_root_table_list.tables[i].signature.ascii;
+
+ if ( pvh_acpi_table_allowed(sig) )
+ num_tables++;
+ }
+
+ /*
+ * No need to add or subtract anything because struct acpi_table_xsdt
+ * includes one array slot already, and we have filtered out the original
+ * MADT and we are going to add a custom built MADT.
+ */
+ size += num_tables * sizeof(xsdt->table_offset_entry[0]);
+
+ xsdt = xzalloc_bytes(size);
+ if ( !xsdt )
+ {
+ printk("Unable to allocate memory for XSDT table\n");
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ /* Copy the native XSDT table header. */
+ rsdp = acpi_os_map_memory(acpi_os_get_root_pointer(), sizeof(*rsdp));
+ if ( !rsdp )
+ {
+ printk("Unable to map RSDP\n");
+ rc = -EINVAL;
+ goto out;
+ }
+ xsdt_paddr = rsdp->xsdt_physical_address;
+ acpi_os_unmap_memory(rsdp, sizeof(*rsdp));
+ table = acpi_os_map_memory(xsdt_paddr, sizeof(*table));
+ if ( !table )
+ {
+ printk("Unable to map XSDT\n");
+ rc = -EINVAL;
+ goto out;
+ }
+ xsdt->header = *table;
+ acpi_os_unmap_memory(table, sizeof(*table));
+
+ /* Add the custom MADT. */
+ xsdt->table_offset_entry[0] = madt_addr;
+
+ /* Copy the addresses of the rest of the allowed tables. */
+ for( i = 0, j = 1; i < acpi_gbl_root_table_list.count; i++ )
+ {
+ const char *sig = acpi_gbl_root_table_list.tables[i].signature.ascii;
+
+ if ( pvh_acpi_table_allowed(sig) )
+ xsdt->table_offset_entry[j++] =
+ acpi_gbl_root_table_list.tables[i].address;
+ }
+
+ xsdt->header.revision = 1;
+ xsdt->header.length = size;
+ /*
+ * Calling acpi_tb_checksum here is a layering violation, but
+ * introducing a wrapper for such simple usage seems overkill.
+ */
+ xsdt->header.checksum -= acpi_tb_checksum(ACPI_CAST_PTR(u8, xsdt), size);
+
+ /* Place the new XSDT in guest memory space. */
+ if ( pvh_steal_ram(d, size, 0, GB(4), addr) )
+ {
+ printk("Unable to find guest RAM for XSDT\n");
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ /* Mark this region as E820_ACPI. */
+ if ( pvh_add_mem_range(d, *addr, *addr + size, E820_ACPI) )
+ printk("Unable to add XSDT region to memory map\n");
+
+ rc = hvm_copy_to_guest_phys(*addr, xsdt, size, d->vcpu[0]);
+ if ( rc )
+ {
+ printk("Unable to copy XSDT into guest memory\n");
+ goto out;
+ }
+
+ rc = 0;
+
+ out:
+ xfree(xsdt);
+
+ return rc;
+}
+
+static int __init pvh_setup_acpi(struct domain *d, paddr_t start_info)
+{
+ unsigned long pfn, nr_pages;
+ paddr_t madt_paddr, xsdt_paddr, rsdp_paddr;
+ unsigned int i;
+ int rc;
+ struct acpi_table_rsdp *native_rsdp, rsdp = {
+ .signature = ACPI_SIG_RSDP,
+ .revision = 2,
+ .length = sizeof(rsdp),
+ };
+
+
+ /* Scan top-level tables and add their regions to the guest memory map. */
+ for( i = 0; i < acpi_gbl_root_table_list.count; i++ )
+ {
+ const char *sig = acpi_gbl_root_table_list.tables[i].signature.ascii;
+ unsigned long addr = acpi_gbl_root_table_list.tables[i].address;
+ unsigned long size = acpi_gbl_root_table_list.tables[i].length;
+
+ /*
+ * Make sure the original MADT is also mapped, so that Dom0 can
+ * properly access the data returned by _MAT methods in case it's
+ * re-using MADT memory.
+ */
+ if ( strncmp(sig, ACPI_SIG_MADT, ACPI_NAME_SIZE)
+ ? pvh_acpi_table_allowed(sig)
+ : !acpi_memory_banned(addr, size) )
+ pvh_add_mem_range(d, addr, addr + size, E820_ACPI);
+ }
+
+ /* Identity map ACPI e820 regions. */
+ for ( i = 0; i < d->arch.nr_e820; i++ )
+ {
+ if ( d->arch.e820[i].type != E820_ACPI &&
+ d->arch.e820[i].type != E820_NVS )
+ continue;
+
+ pfn = PFN_DOWN(d->arch.e820[i].addr);
+ nr_pages = PFN_UP((d->arch.e820[i].addr & ~PAGE_MASK) +
+ d->arch.e820[i].size);
+
+ rc = modify_identity_mmio(d, pfn, nr_pages, true);
+ if ( rc )
+ {
+ printk("Failed to map ACPI region [%#lx, %#lx) into Dom0 memory
map\n",
+ pfn, pfn + nr_pages);
+ return rc;
+ }
+ }
+
+ rc = pvh_setup_acpi_madt(d, &madt_paddr);
+ if ( rc )
+ return rc;
+
+ rc = pvh_setup_acpi_xsdt(d, madt_paddr, &xsdt_paddr);
+ if ( rc )
+ return rc;
+
+ /* Craft a custom RSDP. */
+ native_rsdp = acpi_os_map_memory(acpi_os_get_root_pointer(), sizeof(rsdp));
+ if ( !native_rsdp )
+ {
+ printk("Failed to map native RSDP\n");
+ return -ENOMEM;
+ }
+ memcpy(rsdp.oem_id, native_rsdp->oem_id, sizeof(rsdp.oem_id));
+ acpi_os_unmap_memory(native_rsdp, sizeof(rsdp));
+ rsdp.xsdt_physical_address = xsdt_paddr;
+ /*
+ * Calling acpi_tb_checksum here is a layering violation, but
+ * introducing a wrapper for such simple usage seems overkill.
+ */
+ rsdp.checksum -= acpi_tb_checksum(ACPI_CAST_PTR(u8, &rsdp),
+ ACPI_RSDP_REV0_SIZE);
+ rsdp.extended_checksum -= acpi_tb_checksum(ACPI_CAST_PTR(u8, &rsdp),
+ sizeof(rsdp));
+
+ /*
+ * Place the new RSDP in guest memory space.
+ *
+ * NB: this RSDP is not going to replace the original RSDP, which should
+ * still be accessible to the guest. However that RSDP is going to point to
+ * the native RSDT, and should not be used for the Dom0 kernel's boot
+ * purposes (we keep it visible for post boot access).
+ */
+ if ( pvh_steal_ram(d, sizeof(rsdp), 0, GB(4), &rsdp_paddr) )
+ {
+ printk("Unable to allocate guest RAM for RSDP\n");
+ return -ENOMEM;
+ }
+
+ /* Mark this region as E820_ACPI. */
+ if ( pvh_add_mem_range(d, rsdp_paddr, rsdp_paddr + sizeof(rsdp),
+ E820_ACPI) )
+ printk("Unable to add RSDP region to memory map\n");
+
+ /* Copy RSDP into guest memory. */
+ rc = hvm_copy_to_guest_phys(rsdp_paddr, &rsdp, sizeof(rsdp), d->vcpu[0]);
+ if ( rc )
+ {
+ printk("Unable to copy RSDP into guest memory\n");
+ return rc;
+ }
+
+ /* Copy RSDP address to start_info. */
+ rc = hvm_copy_to_guest_phys(start_info +
+ offsetof(struct hvm_start_info, rsdp_paddr),
+ &rsdp_paddr,
+ sizeof(((struct hvm_start_info *)
+ 0)->rsdp_paddr),
+ d->vcpu[0]);
+ if ( rc )
+ {
+ printk("Unable to copy RSDP into guest memory\n");
+ return rc;
+ }
+
+ return 0;
+}
+
+int __init construct_dom0_pvh(struct domain *d, const module_t *image,
+ unsigned long image_headroom,
+ module_t *initrd,
+ void *(*bootstrap_map)(const module_t *),
+ char *cmdline)
+{
+ paddr_t entry, start_info;
+ int rc;
+
+ printk("** Building a PVH Dom0 **\n");
+
+ iommu_hwdom_init(d);
+
+ rc = pvh_setup_p2m(d);
+ if ( rc )
+ {
+ printk("Failed to setup Dom0 physical memory map\n");
+ return rc;
+ }
+
+ rc = pvh_load_kernel(d, image, image_headroom, initrd,
bootstrap_map(image),
+ cmdline, &entry, &start_info);
+ if ( rc )
+ {
+ printk("Failed to load Dom0 kernel\n");
+ return rc;
+ }
+
+ rc = pvh_setup_cpus(d, entry, start_info);
+ if ( rc )
+ {
+ printk("Failed to setup Dom0 CPUs: %d\n", rc);
+ return rc;
+ }
+
+ rc = pvh_setup_acpi(d, start_info);
+ if ( rc )
+ {
+ printk("Failed to setup Dom0 ACPI tables: %d\n", rc);
+ return rc;
+ }
+
+ panic("Building a PVHv2 Dom0 is not yet supported.");
+ return 0;
+}
+
+/*
+ * Local variables:
+ * mode: C
+ * c-file-style: "BSD"
+ * c-basic-offset: 4
+ * tab-width: 4
+ * indent-tabs-mode: nil
+ * End:
+ */
--
2.11.0
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
https://lists.xen.org/xen-devel
|
 |
Lists.xenproject.org is hosted with RackSpace, monitoring our |