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-rw-r--r--arch/x86/xen/setup.c118
1 files changed, 73 insertions, 45 deletions
diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index a8c306cf8868..a5bf7c451435 100644
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -14,7 +14,7 @@
#include <asm/elf.h>
#include <asm/vdso.h>
-#include <asm/e820.h>
+#include <asm/e820/api.h>
#include <asm/setup.h>
#include <asm/acpi.h>
#include <asm/numa.h>
@@ -41,8 +41,7 @@ struct xen_memory_region xen_extra_mem[XEN_EXTRA_MEM_MAX_REGIONS] __initdata;
unsigned long xen_released_pages;
/* E820 map used during setting up memory. */
-static struct e820entry xen_e820_map[E820_X_MAX] __initdata;
-static u32 xen_e820_map_entries __initdata;
+static struct e820_table xen_e820_table __initdata;
/*
* Buffer used to remap identity mapped pages. We only need the virtual space.
@@ -198,15 +197,15 @@ void __init xen_inv_extra_mem(void)
*/
static unsigned long __init xen_find_pfn_range(unsigned long *min_pfn)
{
- const struct e820entry *entry = xen_e820_map;
+ const struct e820_entry *entry = xen_e820_table.entries;
unsigned int i;
unsigned long done = 0;
- for (i = 0; i < xen_e820_map_entries; i++, entry++) {
+ for (i = 0; i < xen_e820_table.nr_entries; i++, entry++) {
unsigned long s_pfn;
unsigned long e_pfn;
- if (entry->type != E820_RAM)
+ if (entry->type != E820_TYPE_RAM)
continue;
e_pfn = PFN_DOWN(entry->addr + entry->size);
@@ -457,7 +456,7 @@ static unsigned long __init xen_foreach_remap_area(unsigned long nr_pages,
{
phys_addr_t start = 0;
unsigned long ret_val = 0;
- const struct e820entry *entry = xen_e820_map;
+ const struct e820_entry *entry = xen_e820_table.entries;
int i;
/*
@@ -471,13 +470,13 @@ static unsigned long __init xen_foreach_remap_area(unsigned long nr_pages,
* example) the DMI tables in a reserved region that begins on
* a non-page boundary.
*/
- for (i = 0; i < xen_e820_map_entries; i++, entry++) {
+ for (i = 0; i < xen_e820_table.nr_entries; i++, entry++) {
phys_addr_t end = entry->addr + entry->size;
- if (entry->type == E820_RAM || i == xen_e820_map_entries - 1) {
+ if (entry->type == E820_TYPE_RAM || i == xen_e820_table.nr_entries - 1) {
unsigned long start_pfn = PFN_DOWN(start);
unsigned long end_pfn = PFN_UP(end);
- if (entry->type == E820_RAM)
+ if (entry->type == E820_TYPE_RAM)
end_pfn = PFN_UP(entry->addr);
if (start_pfn < end_pfn)
@@ -591,28 +590,28 @@ static void __init xen_align_and_add_e820_region(phys_addr_t start,
phys_addr_t end = start + size;
/* Align RAM regions to page boundaries. */
- if (type == E820_RAM) {
+ if (type == E820_TYPE_RAM) {
start = PAGE_ALIGN(start);
end &= ~((phys_addr_t)PAGE_SIZE - 1);
}
- e820_add_region(start, end - start, type);
+ e820__range_add(start, end - start, type);
}
static void __init xen_ignore_unusable(void)
{
- struct e820entry *entry = xen_e820_map;
+ struct e820_entry *entry = xen_e820_table.entries;
unsigned int i;
- for (i = 0; i < xen_e820_map_entries; i++, entry++) {
- if (entry->type == E820_UNUSABLE)
- entry->type = E820_RAM;
+ for (i = 0; i < xen_e820_table.nr_entries; i++, entry++) {
+ if (entry->type == E820_TYPE_UNUSABLE)
+ entry->type = E820_TYPE_RAM;
}
}
bool __init xen_is_e820_reserved(phys_addr_t start, phys_addr_t size)
{
- struct e820entry *entry;
+ struct e820_entry *entry;
unsigned mapcnt;
phys_addr_t end;
@@ -620,10 +619,10 @@ bool __init xen_is_e820_reserved(phys_addr_t start, phys_addr_t size)
return false;
end = start + size;
- entry = xen_e820_map;
+ entry = xen_e820_table.entries;
- for (mapcnt = 0; mapcnt < xen_e820_map_entries; mapcnt++) {
- if (entry->type == E820_RAM && entry->addr <= start &&
+ for (mapcnt = 0; mapcnt < xen_e820_table.nr_entries; mapcnt++) {
+ if (entry->type == E820_TYPE_RAM && entry->addr <= start &&
(entry->addr + entry->size) >= end)
return false;
@@ -645,10 +644,10 @@ phys_addr_t __init xen_find_free_area(phys_addr_t size)
{
unsigned mapcnt;
phys_addr_t addr, start;
- struct e820entry *entry = xen_e820_map;
+ struct e820_entry *entry = xen_e820_table.entries;
- for (mapcnt = 0; mapcnt < xen_e820_map_entries; mapcnt++, entry++) {
- if (entry->type != E820_RAM || entry->size < size)
+ for (mapcnt = 0; mapcnt < xen_e820_table.nr_entries; mapcnt++, entry++) {
+ if (entry->type != E820_TYPE_RAM || entry->size < size)
continue;
start = entry->addr;
for (addr = start; addr < start + size; addr += PAGE_SIZE) {
@@ -750,8 +749,8 @@ char * __init xen_memory_setup(void)
max_pfn = min(max_pfn, xen_start_info->nr_pages);
mem_end = PFN_PHYS(max_pfn);
- memmap.nr_entries = ARRAY_SIZE(xen_e820_map);
- set_xen_guest_handle(memmap.buffer, xen_e820_map);
+ memmap.nr_entries = ARRAY_SIZE(xen_e820_table.entries);
+ set_xen_guest_handle(memmap.buffer, xen_e820_table.entries);
op = xen_initial_domain() ?
XENMEM_machine_memory_map :
@@ -760,16 +759,16 @@ char * __init xen_memory_setup(void)
if (rc == -ENOSYS) {
BUG_ON(xen_initial_domain());
memmap.nr_entries = 1;
- xen_e820_map[0].addr = 0ULL;
- xen_e820_map[0].size = mem_end;
+ xen_e820_table.entries[0].addr = 0ULL;
+ xen_e820_table.entries[0].size = mem_end;
/* 8MB slack (to balance backend allocations). */
- xen_e820_map[0].size += 8ULL << 20;
- xen_e820_map[0].type = E820_RAM;
+ xen_e820_table.entries[0].size += 8ULL << 20;
+ xen_e820_table.entries[0].type = E820_TYPE_RAM;
rc = 0;
}
BUG_ON(rc);
BUG_ON(memmap.nr_entries == 0);
- xen_e820_map_entries = memmap.nr_entries;
+ xen_e820_table.nr_entries = memmap.nr_entries;
/*
* Xen won't allow a 1:1 mapping to be created to UNUSABLE
@@ -783,8 +782,7 @@ char * __init xen_memory_setup(void)
xen_ignore_unusable();
/* Make sure the Xen-supplied memory map is well-ordered. */
- sanitize_e820_map(xen_e820_map, ARRAY_SIZE(xen_e820_map),
- &xen_e820_map_entries);
+ e820__update_table(&xen_e820_table);
max_pages = xen_get_max_pages();
@@ -811,15 +809,15 @@ char * __init xen_memory_setup(void)
extra_pages = min3(EXTRA_MEM_RATIO * min(max_pfn, PFN_DOWN(MAXMEM)),
extra_pages, max_pages - max_pfn);
i = 0;
- addr = xen_e820_map[0].addr;
- size = xen_e820_map[0].size;
- while (i < xen_e820_map_entries) {
+ addr = xen_e820_table.entries[0].addr;
+ size = xen_e820_table.entries[0].size;
+ while (i < xen_e820_table.nr_entries) {
bool discard = false;
chunk_size = size;
- type = xen_e820_map[i].type;
+ type = xen_e820_table.entries[i].type;
- if (type == E820_RAM) {
+ if (type == E820_TYPE_RAM) {
if (addr < mem_end) {
chunk_size = min(size, mem_end - addr);
} else if (extra_pages) {
@@ -840,9 +838,9 @@ char * __init xen_memory_setup(void)
size -= chunk_size;
if (size == 0) {
i++;
- if (i < xen_e820_map_entries) {
- addr = xen_e820_map[i].addr;
- size = xen_e820_map[i].size;
+ if (i < xen_e820_table.nr_entries) {
+ addr = xen_e820_table.entries[i].addr;
+ size = xen_e820_table.entries[i].size;
}
}
}
@@ -858,10 +856,9 @@ char * __init xen_memory_setup(void)
* reserve ISA memory anyway because too many things poke
* about in there.
*/
- e820_add_region(ISA_START_ADDRESS, ISA_END_ADDRESS - ISA_START_ADDRESS,
- E820_RESERVED);
+ e820__range_add(ISA_START_ADDRESS, ISA_END_ADDRESS - ISA_START_ADDRESS, E820_TYPE_RESERVED);
- sanitize_e820_map(e820->map, ARRAY_SIZE(e820->map), &e820->nr_map);
+ e820__update_table(e820_table);
/*
* Check whether the kernel itself conflicts with the target E820 map.
@@ -915,6 +912,37 @@ char * __init xen_memory_setup(void)
}
/*
+ * Machine specific memory setup for auto-translated guests.
+ */
+char * __init xen_auto_xlated_memory_setup(void)
+{
+ struct xen_memory_map memmap;
+ int i;
+ int rc;
+
+ memmap.nr_entries = ARRAY_SIZE(xen_e820_table.entries);
+ set_xen_guest_handle(memmap.buffer, xen_e820_table.entries);
+
+ rc = HYPERVISOR_memory_op(XENMEM_memory_map, &memmap);
+ if (rc < 0)
+ panic("No memory map (%d)\n", rc);
+
+ xen_e820_table.nr_entries = memmap.nr_entries;
+
+ e820__update_table(&xen_e820_table);
+
+ for (i = 0; i < xen_e820_table.nr_entries; i++)
+ e820__range_add(xen_e820_table.entries[i].addr, xen_e820_table.entries[i].size, xen_e820_table.entries[i].type);
+
+ /* Remove p2m info, it is not needed. */
+ xen_start_info->mfn_list = 0;
+ xen_start_info->first_p2m_pfn = 0;
+ xen_start_info->nr_p2m_frames = 0;
+
+ return "Xen";
+}
+
+/*
* Set the bit indicating "nosegneg" library variants should be used.
* We only need to bother in pure 32-bit mode; compat 32-bit processes
* can have un-truncated segments, so wrapping around is allowed.
@@ -999,8 +1027,8 @@ void __init xen_pvmmu_arch_setup(void)
void __init xen_arch_setup(void)
{
xen_panic_handler_init();
-
- xen_pvmmu_arch_setup();
+ if (!xen_feature(XENFEAT_auto_translated_physmap))
+ xen_pvmmu_arch_setup();
#ifdef CONFIG_ACPI
if (!(xen_start_info->flags & SIF_INITDOMAIN)) {
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.