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-rw-r--r--arch/x86/mm/Makefile3
-rw-r--r--arch/x86/mm/fault.c2
-rw-r--r--arch/x86/mm/gup.c2
-rw-r--r--arch/x86/mm/init_64.c75
-rw-r--r--arch/x86/mm/ioremap.c22
-rw-r--r--arch/x86/mm/pat.c4
6 files changed, 68 insertions, 40 deletions
diff --git a/arch/x86/mm/Makefile b/arch/x86/mm/Makefile
index 59f89b434b45..0a21b7aab9dc 100644
--- a/arch/x86/mm/Makefile
+++ b/arch/x86/mm/Makefile
@@ -8,9 +8,8 @@ obj-$(CONFIG_X86_PTDUMP) += dump_pagetables.o
obj-$(CONFIG_HIGHMEM) += highmem_32.o
-obj-$(CONFIG_MMIOTRACE_HOOKS) += kmmio.o
obj-$(CONFIG_MMIOTRACE) += mmiotrace.o
-mmiotrace-y := pf_in.o mmio-mod.o
+mmiotrace-y := kmmio.o pf_in.o mmio-mod.o
obj-$(CONFIG_MMIOTRACE_TEST) += testmmiotrace.o
obj-$(CONFIG_NUMA) += numa_$(BITS).o
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index 31e8730fa246..4152d3c3b138 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -53,7 +53,7 @@
static inline int kmmio_fault(struct pt_regs *regs, unsigned long addr)
{
-#ifdef CONFIG_MMIOTRACE_HOOKS
+#ifdef CONFIG_MMIOTRACE
if (unlikely(is_kmmio_active()))
if (kmmio_handler(regs, addr) == 1)
return -1;
diff --git a/arch/x86/mm/gup.c b/arch/x86/mm/gup.c
index 4ba373c5b8c8..be54176e9eb2 100644
--- a/arch/x86/mm/gup.c
+++ b/arch/x86/mm/gup.c
@@ -233,7 +233,7 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write,
len = (unsigned long) nr_pages << PAGE_SHIFT;
end = start + len;
if (unlikely(!access_ok(write ? VERIFY_WRITE : VERIFY_READ,
- start, len)))
+ (void __user *)start, len)))
goto slow_irqon;
/*
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index b8e461d49412..9db01db6e3cd 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -350,8 +350,10 @@ phys_pte_init(pte_t *pte_page, unsigned long addr, unsigned long end,
* pagetable pages as RO. So assume someone who pre-setup
* these mappings are more intelligent.
*/
- if (pte_val(*pte))
+ if (pte_val(*pte)) {
+ pages++;
continue;
+ }
if (0)
printk(" pte=%p addr=%lx pte=%016lx\n",
@@ -418,8 +420,10 @@ phys_pmd_init(pmd_t *pmd_page, unsigned long address, unsigned long end,
* not differ with respect to page frame and
* attributes.
*/
- if (page_size_mask & (1 << PG_LEVEL_2M))
+ if (page_size_mask & (1 << PG_LEVEL_2M)) {
+ pages++;
continue;
+ }
new_prot = pte_pgprot(pte_clrhuge(*(pte_t *)pmd));
}
@@ -499,8 +503,10 @@ phys_pud_init(pud_t *pud_page, unsigned long addr, unsigned long end,
* not differ with respect to page frame and
* attributes.
*/
- if (page_size_mask & (1 << PG_LEVEL_1G))
+ if (page_size_mask & (1 << PG_LEVEL_1G)) {
+ pages++;
continue;
+ }
prot = pte_pgprot(pte_clrhuge(*(pte_t *)pud));
}
@@ -665,12 +671,13 @@ unsigned long __init_refok init_memory_mapping(unsigned long start,
unsigned long last_map_addr = 0;
unsigned long page_size_mask = 0;
unsigned long start_pfn, end_pfn;
+ unsigned long pos;
struct map_range mr[NR_RANGE_MR];
int nr_range, i;
int use_pse, use_gbpages;
- printk(KERN_INFO "init_memory_mapping\n");
+ printk(KERN_INFO "init_memory_mapping: %016lx-%016lx\n", start, end);
/*
* Find space for the kernel direct mapping tables.
@@ -704,35 +711,50 @@ unsigned long __init_refok init_memory_mapping(unsigned long start,
/* head if not big page alignment ?*/
start_pfn = start >> PAGE_SHIFT;
- end_pfn = ((start + (PMD_SIZE - 1)) >> PMD_SHIFT)
+ pos = start_pfn << PAGE_SHIFT;
+ end_pfn = ((pos + (PMD_SIZE - 1)) >> PMD_SHIFT)
<< (PMD_SHIFT - PAGE_SHIFT);
- nr_range = save_mr(mr, nr_range, start_pfn, end_pfn, 0);
+ if (start_pfn < end_pfn) {
+ nr_range = save_mr(mr, nr_range, start_pfn, end_pfn, 0);
+ pos = end_pfn << PAGE_SHIFT;
+ }
/* big page (2M) range*/
- start_pfn = ((start + (PMD_SIZE - 1))>>PMD_SHIFT)
+ start_pfn = ((pos + (PMD_SIZE - 1))>>PMD_SHIFT)
<< (PMD_SHIFT - PAGE_SHIFT);
- end_pfn = ((start + (PUD_SIZE - 1))>>PUD_SHIFT)
+ end_pfn = ((pos + (PUD_SIZE - 1))>>PUD_SHIFT)
<< (PUD_SHIFT - PAGE_SHIFT);
- if (end_pfn > ((end>>PUD_SHIFT)<<(PUD_SHIFT - PAGE_SHIFT)))
- end_pfn = ((end>>PUD_SHIFT)<<(PUD_SHIFT - PAGE_SHIFT));
- nr_range = save_mr(mr, nr_range, start_pfn, end_pfn,
- page_size_mask & (1<<PG_LEVEL_2M));
+ if (end_pfn > ((end>>PMD_SHIFT)<<(PMD_SHIFT - PAGE_SHIFT)))
+ end_pfn = ((end>>PMD_SHIFT)<<(PMD_SHIFT - PAGE_SHIFT));
+ if (start_pfn < end_pfn) {
+ nr_range = save_mr(mr, nr_range, start_pfn, end_pfn,
+ page_size_mask & (1<<PG_LEVEL_2M));
+ pos = end_pfn << PAGE_SHIFT;
+ }
/* big page (1G) range */
- start_pfn = end_pfn;
- end_pfn = (end>>PUD_SHIFT) << (PUD_SHIFT - PAGE_SHIFT);
- nr_range = save_mr(mr, nr_range, start_pfn, end_pfn,
+ start_pfn = ((pos + (PUD_SIZE - 1))>>PUD_SHIFT)
+ << (PUD_SHIFT - PAGE_SHIFT);
+ end_pfn = (end >> PUD_SHIFT) << (PUD_SHIFT - PAGE_SHIFT);
+ if (start_pfn < end_pfn) {
+ nr_range = save_mr(mr, nr_range, start_pfn, end_pfn,
page_size_mask &
((1<<PG_LEVEL_2M)|(1<<PG_LEVEL_1G)));
+ pos = end_pfn << PAGE_SHIFT;
+ }
/* tail is not big page (1G) alignment */
- start_pfn = end_pfn;
- end_pfn = (end>>PMD_SHIFT) << (PMD_SHIFT - PAGE_SHIFT);
- nr_range = save_mr(mr, nr_range, start_pfn, end_pfn,
- page_size_mask & (1<<PG_LEVEL_2M));
+ start_pfn = ((pos + (PMD_SIZE - 1))>>PMD_SHIFT)
+ << (PMD_SHIFT - PAGE_SHIFT);
+ end_pfn = (end >> PMD_SHIFT) << (PMD_SHIFT - PAGE_SHIFT);
+ if (start_pfn < end_pfn) {
+ nr_range = save_mr(mr, nr_range, start_pfn, end_pfn,
+ page_size_mask & (1<<PG_LEVEL_2M));
+ pos = end_pfn << PAGE_SHIFT;
+ }
/* tail is not big page (2M) alignment */
- start_pfn = end_pfn;
+ start_pfn = pos>>PAGE_SHIFT;
end_pfn = end>>PAGE_SHIFT;
nr_range = save_mr(mr, nr_range, start_pfn, end_pfn, 0);
@@ -831,12 +853,12 @@ int arch_add_memory(int nid, u64 start, u64 size)
unsigned long nr_pages = size >> PAGE_SHIFT;
int ret;
- last_mapped_pfn = init_memory_mapping(start, start + size-1);
+ last_mapped_pfn = init_memory_mapping(start, start + size);
if (last_mapped_pfn > max_pfn_mapped)
max_pfn_mapped = last_mapped_pfn;
ret = __add_pages(zone, start_pfn, nr_pages);
- WARN_ON(1);
+ WARN_ON_ONCE(ret);
return ret;
}
@@ -878,6 +900,7 @@ static struct kcore_list kcore_mem, kcore_vmalloc, kcore_kernel,
void __init mem_init(void)
{
long codesize, reservedpages, datasize, initsize;
+ unsigned long absent_pages;
start_periodic_check_for_corruption();
@@ -893,8 +916,9 @@ void __init mem_init(void)
#else
totalram_pages = free_all_bootmem();
#endif
- reservedpages = max_pfn - totalram_pages -
- absent_pages_in_range(0, max_pfn);
+
+ absent_pages = absent_pages_in_range(0, max_pfn);
+ reservedpages = max_pfn - totalram_pages - absent_pages;
after_bootmem = 1;
codesize = (unsigned long) &_etext - (unsigned long) &_text;
@@ -911,10 +935,11 @@ void __init mem_init(void)
VSYSCALL_END - VSYSCALL_START);
printk(KERN_INFO "Memory: %luk/%luk available (%ldk kernel code, "
- "%ldk reserved, %ldk data, %ldk init)\n",
+ "%ldk absent, %ldk reserved, %ldk data, %ldk init)\n",
(unsigned long) nr_free_pages() << (PAGE_SHIFT-10),
max_pfn << (PAGE_SHIFT-10),
codesize >> 10,
+ absent_pages << (PAGE_SHIFT-10),
reservedpages << (PAGE_SHIFT-10),
datasize >> 10,
initsize >> 10);
diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c
index ae71e11eb3e5..d4c4307ff3e0 100644
--- a/arch/x86/mm/ioremap.c
+++ b/arch/x86/mm/ioremap.c
@@ -387,7 +387,7 @@ static void __iomem *ioremap_default(resource_size_t phys_addr,
unsigned long size)
{
unsigned long flags;
- void *ret;
+ void __iomem *ret;
int err;
/*
@@ -399,11 +399,11 @@ static void __iomem *ioremap_default(resource_size_t phys_addr,
if (err < 0)
return NULL;
- ret = (void *) __ioremap_caller(phys_addr, size, flags,
- __builtin_return_address(0));
+ ret = __ioremap_caller(phys_addr, size, flags,
+ __builtin_return_address(0));
free_memtype(phys_addr, phys_addr + size);
- return (void __iomem *)ret;
+ return ret;
}
void __iomem *ioremap_prot(resource_size_t phys_addr, unsigned long size,
@@ -622,7 +622,7 @@ static inline void __init early_clear_fixmap(enum fixed_addresses idx)
__early_set_fixmap(idx, 0, __pgprot(0));
}
-static void *prev_map[FIX_BTMAPS_SLOTS] __initdata;
+static void __iomem *prev_map[FIX_BTMAPS_SLOTS] __initdata;
static unsigned long prev_size[FIX_BTMAPS_SLOTS] __initdata;
static int __init check_early_ioremap_leak(void)
{
@@ -645,7 +645,7 @@ static int __init check_early_ioremap_leak(void)
}
late_initcall(check_early_ioremap_leak);
-static void __init *__early_ioremap(unsigned long phys_addr, unsigned long size, pgprot_t prot)
+static void __init __iomem *__early_ioremap(unsigned long phys_addr, unsigned long size, pgprot_t prot)
{
unsigned long offset, last_addr;
unsigned int nrpages;
@@ -713,23 +713,23 @@ static void __init *__early_ioremap(unsigned long phys_addr, unsigned long size,
if (early_ioremap_debug)
printk(KERN_CONT "%08lx + %08lx\n", offset, fix_to_virt(idx0));
- prev_map[slot] = (void *) (offset + fix_to_virt(idx0));
+ prev_map[slot] = (void __iomem *)(offset + fix_to_virt(idx0));
return prev_map[slot];
}
/* Remap an IO device */
-void __init *early_ioremap(unsigned long phys_addr, unsigned long size)
+void __init __iomem *early_ioremap(unsigned long phys_addr, unsigned long size)
{
return __early_ioremap(phys_addr, size, PAGE_KERNEL_IO);
}
/* Remap memory */
-void __init *early_memremap(unsigned long phys_addr, unsigned long size)
+void __init __iomem *early_memremap(unsigned long phys_addr, unsigned long size)
{
return __early_ioremap(phys_addr, size, PAGE_KERNEL);
}
-void __init early_iounmap(void *addr, unsigned long size)
+void __init early_iounmap(void __iomem *addr, unsigned long size)
{
unsigned long virt_addr;
unsigned long offset;
@@ -779,7 +779,7 @@ void __init early_iounmap(void *addr, unsigned long size)
--idx;
--nrpages;
}
- prev_map[slot] = 0;
+ prev_map[slot] = NULL;
}
void __this_fixmap_does_not_exist(void)
diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c
index 738fd0f24958..eb1bf000d12e 100644
--- a/arch/x86/mm/pat.c
+++ b/arch/x86/mm/pat.c
@@ -481,12 +481,16 @@ static inline int range_is_allowed(unsigned long pfn, unsigned long size)
return 1;
}
#else
+/* This check is needed to avoid cache aliasing when PAT is enabled */
static inline int range_is_allowed(unsigned long pfn, unsigned long size)
{
u64 from = ((u64)pfn) << PAGE_SHIFT;
u64 to = from + size;
u64 cursor = from;
+ if (!pat_enabled)
+ return 1;
+
while (cursor < to) {
if (!devmem_is_allowed(pfn)) {
printk(KERN_INFO
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.