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mem: make McKernel kernel heap virtual addresses Linux compatible

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Cherry-pick of e5334c646d2dc6fb11d419918d8139a0de583fde
This commit is contained in:
Balazs Gerofi
2018-02-19 10:57:23 +09:00
committed by Masamichi Takagi
parent cae6b9f154
commit 0076e1f5e0
3 changed files with 21 additions and 20 deletions
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2
arch/x86_64/kernel/include/arch-memory.h
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@ -64,8 +64,6 @@
#define MAP_VMAP_SIZE 0x0000000100000000UL
#define KERNEL_PHYS_OFFSET MAP_ST_START
#define PTL4_SHIFT 39
#define PTL4_SIZE (1UL << PTL4_SHIFT)
#define PTL3_SHIFT 30

26
arch/x86_64/kernel/memory.c
View File

@ -107,6 +107,7 @@ struct page_table {
};
static struct page_table *init_pt;
static int init_pt_loaded = 0;
static ihk_spinlock_t init_pt_lock;
static int use_1gb_page = 0;
@ -2658,7 +2659,8 @@ void init_page_table(void)
init_vsyscall_area(init_pt);
load_page_table(init_pt);
kprintf("Page table is now at %p\n", init_pt);
init_pt_loaded = 1;
kprintf("Page table is now at 0x%lx\n", init_pt);
}
extern void __reserve_arch_pages(unsigned long, unsigned long,
@ -2686,17 +2688,31 @@ void ihk_mc_reserve_arch_pages(struct ihk_page_allocator_desc *pa_allocator,
unsigned long virt_to_phys(void *v)
{
unsigned long va = (unsigned long)v;
if (va >= MAP_KERNEL_START) {
if (va >= LINUX_PAGE_OFFSET) {
return va - LINUX_PAGE_OFFSET;
}
else if (va >= MAP_KERNEL_START) {
//kprintf("%s: MAP_KERNEL_START <= 0x%lx <= LINUX_PAGE_OFFSET\n", __FUNCTION__, va);
return va - MAP_KERNEL_START + x86_kernel_phys_base;
} else {
}
else if (va >= MAP_FIXED_START) {
return va - MAP_FIXED_START;
}
else {
//kprintf("%s: MAP_ST_START <= 0x%lx <= MAP_FIXED_START\n", __FUNCTION__, va);
return va - MAP_ST_START;
}
}
void *phys_to_virt(unsigned long p)
{
return (void *)(p + MAP_ST_START);
/* Before loading our own PT use straight mapping */
if (!init_pt_loaded) {
return (void *)(p + MAP_ST_START);
}
return (void *)(p + LINUX_PAGE_OFFSET);
}
int copy_from_user(void *dst, const void *src, size_t siz)