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-rw-r--r--arch/x86/xen/setup.c79
1 files changed, 34 insertions, 45 deletions
diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index dfd77dec8e2b..55f388ef481a 100644
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -32,16 +32,6 @@
#include "p2m.h"
#include "mmu.h"
-/* These are code, but not functions. Defined in entry.S */
-extern const char xen_hypervisor_callback[];
-extern const char xen_failsafe_callback[];
-#ifdef CONFIG_X86_64
-extern asmlinkage void nmi(void);
-#endif
-extern void xen_sysenter_target(void);
-extern void xen_syscall_target(void);
-extern void xen_syscall32_target(void);
-
/* Amount of extra memory space we add to the e820 ranges */
struct xen_memory_region xen_extra_mem[XEN_EXTRA_MEM_MAX_REGIONS] __initdata;
@@ -74,7 +64,7 @@ static unsigned long xen_remap_mfn __initdata = INVALID_P2M_ENTRY;
*/
#define EXTRA_MEM_RATIO (10)
-static void __init xen_add_extra_mem(u64 start, u64 size)
+static void __init xen_add_extra_mem(phys_addr_t start, phys_addr_t size)
{
int i;
@@ -97,10 +87,10 @@ static void __init xen_add_extra_mem(u64 start, u64 size)
memblock_reserve(start, size);
}
-static void __init xen_del_extra_mem(u64 start, u64 size)
+static void __init xen_del_extra_mem(phys_addr_t start, phys_addr_t size)
{
int i;
- u64 start_r, size_r;
+ phys_addr_t start_r, size_r;
for (i = 0; i < XEN_EXTRA_MEM_MAX_REGIONS; i++) {
start_r = xen_extra_mem[i].start;
@@ -140,7 +130,7 @@ static void __init xen_del_extra_mem(u64 start, u64 size)
unsigned long __ref xen_chk_extra_mem(unsigned long pfn)
{
int i;
- unsigned long addr = PFN_PHYS(pfn);
+ phys_addr_t addr = PFN_PHYS(pfn);
for (i = 0; i < XEN_EXTRA_MEM_MAX_REGIONS; i++) {
if (addr >= xen_extra_mem[i].start &&
@@ -160,6 +150,8 @@ void __init xen_inv_extra_mem(void)
int i;
for (i = 0; i < XEN_EXTRA_MEM_MAX_REGIONS; i++) {
+ if (!xen_extra_mem[i].size)
+ continue;
pfn_s = PFN_DOWN(xen_extra_mem[i].start);
pfn_e = PFN_UP(xen_extra_mem[i].start + xen_extra_mem[i].size);
for (pfn = pfn_s; pfn < pfn_e; pfn++)
@@ -229,15 +221,14 @@ static int __init xen_free_mfn(unsigned long mfn)
* as a fallback if the remapping fails.
*/
static void __init xen_set_identity_and_release_chunk(unsigned long start_pfn,
- unsigned long end_pfn, unsigned long nr_pages, unsigned long *identity,
- unsigned long *released)
+ unsigned long end_pfn, unsigned long nr_pages, unsigned long *released)
{
- unsigned long len = 0;
unsigned long pfn, end;
int ret;
WARN_ON(start_pfn > end_pfn);
+ /* Release pages first. */
end = min(end_pfn, nr_pages);
for (pfn = start_pfn; pfn < end; pfn++) {
unsigned long mfn = pfn_to_mfn(pfn);
@@ -250,16 +241,14 @@ static void __init xen_set_identity_and_release_chunk(unsigned long start_pfn,
WARN(ret != 1, "Failed to release pfn %lx err=%d\n", pfn, ret);
if (ret == 1) {
+ (*released)++;
if (!__set_phys_to_machine(pfn, INVALID_P2M_ENTRY))
break;
- len++;
} else
break;
}
- /* Need to release pages first */
- *released += len;
- *identity += set_phys_range_identity(start_pfn, end_pfn);
+ set_phys_range_identity(start_pfn, end_pfn);
}
/*
@@ -268,7 +257,7 @@ static void __init xen_set_identity_and_release_chunk(unsigned long start_pfn,
static void __init xen_update_mem_tables(unsigned long pfn, unsigned long mfn)
{
struct mmu_update update = {
- .ptr = ((unsigned long long)mfn << PAGE_SHIFT) | MMU_MACHPHYS_UPDATE,
+ .ptr = ((uint64_t)mfn << PAGE_SHIFT) | MMU_MACHPHYS_UPDATE,
.val = pfn
};
@@ -287,7 +276,7 @@ static void __init xen_update_mem_tables(unsigned long pfn, unsigned long mfn)
}
/* Update kernel mapping, but not for highmem. */
- if ((pfn << PAGE_SHIFT) >= __pa(high_memory))
+ if (pfn >= PFN_UP(__pa(high_memory - 1)))
return;
if (HYPERVISOR_update_va_mapping((unsigned long)__va(pfn << PAGE_SHIFT),
@@ -318,7 +307,6 @@ static void __init xen_do_set_identity_and_remap_chunk(
unsigned long ident_pfn_iter, remap_pfn_iter;
unsigned long ident_end_pfn = start_pfn + size;
unsigned long left = size;
- unsigned long ident_cnt = 0;
unsigned int i, chunk;
WARN_ON(size == 0);
@@ -347,8 +335,7 @@ static void __init xen_do_set_identity_and_remap_chunk(
xen_remap_mfn = mfn;
/* Set identity map */
- ident_cnt += set_phys_range_identity(ident_pfn_iter,
- ident_pfn_iter + chunk);
+ set_phys_range_identity(ident_pfn_iter, ident_pfn_iter + chunk);
left -= chunk;
}
@@ -371,7 +358,7 @@ static void __init xen_do_set_identity_and_remap_chunk(
static unsigned long __init xen_set_identity_and_remap_chunk(
const struct e820entry *list, size_t map_size, unsigned long start_pfn,
unsigned long end_pfn, unsigned long nr_pages, unsigned long remap_pfn,
- unsigned long *identity, unsigned long *released)
+ unsigned long *released, unsigned long *remapped)
{
unsigned long pfn;
unsigned long i = 0;
@@ -386,8 +373,7 @@ static unsigned long __init xen_set_identity_and_remap_chunk(
/* Do not remap pages beyond the current allocation */
if (cur_pfn >= nr_pages) {
/* Identity map remaining pages */
- *identity += set_phys_range_identity(cur_pfn,
- cur_pfn + size);
+ set_phys_range_identity(cur_pfn, cur_pfn + size);
break;
}
if (cur_pfn + size > nr_pages)
@@ -398,7 +384,7 @@ static unsigned long __init xen_set_identity_and_remap_chunk(
if (!remap_range_size) {
pr_warning("Unable to find available pfn range, not remapping identity pages\n");
xen_set_identity_and_release_chunk(cur_pfn,
- cur_pfn + left, nr_pages, identity, released);
+ cur_pfn + left, nr_pages, released);
break;
}
/* Adjust size to fit in current e820 RAM region */
@@ -410,7 +396,7 @@ static unsigned long __init xen_set_identity_and_remap_chunk(
/* Update variables to reflect new mappings. */
i += size;
remap_pfn += size;
- *identity += size;
+ *remapped += size;
}
/*
@@ -427,13 +413,13 @@ static unsigned long __init xen_set_identity_and_remap_chunk(
static void __init xen_set_identity_and_remap(
const struct e820entry *list, size_t map_size, unsigned long nr_pages,
- unsigned long *released)
+ unsigned long *released, unsigned long *remapped)
{
phys_addr_t start = 0;
- unsigned long identity = 0;
unsigned long last_pfn = nr_pages;
const struct e820entry *entry;
unsigned long num_released = 0;
+ unsigned long num_remapped = 0;
int i;
/*
@@ -460,14 +446,14 @@ static void __init xen_set_identity_and_remap(
last_pfn = xen_set_identity_and_remap_chunk(
list, map_size, start_pfn,
end_pfn, nr_pages, last_pfn,
- &identity, &num_released);
+ &num_released, &num_remapped);
start = end;
}
}
*released = num_released;
+ *remapped = num_remapped;
- pr_info("Set %ld page(s) to 1-1 mapping\n", identity);
pr_info("Released %ld page(s)\n", num_released);
}
@@ -549,20 +535,21 @@ static unsigned long __init xen_get_max_pages(void)
return min(max_pages, MAX_DOMAIN_PAGES);
}
-static void xen_align_and_add_e820_region(u64 start, u64 size, int type)
+static void __init xen_align_and_add_e820_region(phys_addr_t start,
+ phys_addr_t size, int type)
{
- u64 end = start + size;
+ phys_addr_t end = start + size;
/* Align RAM regions to page boundaries. */
if (type == E820_RAM) {
start = PAGE_ALIGN(start);
- end &= ~((u64)PAGE_SIZE - 1);
+ end &= ~((phys_addr_t)PAGE_SIZE - 1);
}
e820_add_region(start, end - start, type);
}
-void xen_ignore_unusable(struct e820entry *list, size_t map_size)
+static void __init xen_ignore_unusable(struct e820entry *list, size_t map_size)
{
struct e820entry *entry;
unsigned int i;
@@ -581,11 +568,12 @@ char * __init xen_memory_setup(void)
static struct e820entry map[E820MAX] __initdata;
unsigned long max_pfn = xen_start_info->nr_pages;
- unsigned long long mem_end;
+ phys_addr_t mem_end;
int rc;
struct xen_memory_map memmap;
unsigned long max_pages;
unsigned long extra_pages = 0;
+ unsigned long remapped_pages;
int i;
int op;
@@ -635,9 +623,10 @@ char * __init xen_memory_setup(void)
* underlying RAM.
*/
xen_set_identity_and_remap(map, memmap.nr_entries, max_pfn,
- &xen_released_pages);
+ &xen_released_pages, &remapped_pages);
extra_pages += xen_released_pages;
+ extra_pages += remapped_pages;
/*
* Clamp the amount of extra memory to a EXTRA_MEM_RATIO
@@ -654,16 +643,16 @@ char * __init xen_memory_setup(void)
extra_pages);
i = 0;
while (i < memmap.nr_entries) {
- u64 addr = map[i].addr;
- u64 size = map[i].size;
+ phys_addr_t addr = map[i].addr;
+ phys_addr_t size = map[i].size;
u32 type = map[i].type;
if (type == E820_RAM) {
if (addr < mem_end) {
size = min(size, mem_end - addr);
} else if (extra_pages) {
- size = min(size, (u64)extra_pages * PAGE_SIZE);
- extra_pages -= size / PAGE_SIZE;
+ size = min(size, PFN_PHYS(extra_pages));
+ extra_pages -= PFN_DOWN(size);
xen_add_extra_mem(addr, size);
xen_max_p2m_pfn = PFN_DOWN(addr + size);
} else
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.