mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 09:46:43 +07:00
a4045dff78
In x86_64 platform, INT1 and INT3 trap stack is IST stack called DEBUG_STACK, when INT1/INT3 trap happens, system will switch to DEBUG_STACK by hardware. Current DEBUG_STACK size is 4K, when int1/int3 trap happens, kernel will minus current DEBUG_STACK IST value by 4k. But if int3/int1 trap is nested, it will destroy other vector's IST stack. This patch modifies this, it sets DEBUG_STACK size as 8K and allows two level of nested int1/int3 trap. Kprobe DEBUG_STACK may be nested, because kprobe handler may be probed by other kprobes. Thanks jbeulich for pointing out error in the first patch. [AK: nested kprobes are pretty dubious. Hopefully one nest will be enough. This will cost 8K per CPU (4K more than before)] Signed-off-by: bibo, mao <bibo.mao@intel.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
144 lines
4.4 KiB
C
144 lines
4.4 KiB
C
#ifndef _X86_64_PAGE_H
|
|
#define _X86_64_PAGE_H
|
|
|
|
|
|
/* PAGE_SHIFT determines the page size */
|
|
#define PAGE_SHIFT 12
|
|
#ifdef __ASSEMBLY__
|
|
#define PAGE_SIZE (0x1 << PAGE_SHIFT)
|
|
#else
|
|
#define PAGE_SIZE (1UL << PAGE_SHIFT)
|
|
#endif
|
|
#define PAGE_MASK (~(PAGE_SIZE-1))
|
|
#define PHYSICAL_PAGE_MASK (~(PAGE_SIZE-1) & __PHYSICAL_MASK)
|
|
|
|
#define THREAD_ORDER 1
|
|
#define THREAD_SIZE (PAGE_SIZE << THREAD_ORDER)
|
|
#define CURRENT_MASK (~(THREAD_SIZE-1))
|
|
|
|
#define EXCEPTION_STACK_ORDER 0
|
|
#define EXCEPTION_STKSZ (PAGE_SIZE << EXCEPTION_STACK_ORDER)
|
|
|
|
#define DEBUG_STACK_ORDER (EXCEPTION_STACK_ORDER + 1)
|
|
#define DEBUG_STKSZ (PAGE_SIZE << DEBUG_STACK_ORDER)
|
|
|
|
#define IRQSTACK_ORDER 2
|
|
#define IRQSTACKSIZE (PAGE_SIZE << IRQSTACK_ORDER)
|
|
|
|
#define STACKFAULT_STACK 1
|
|
#define DOUBLEFAULT_STACK 2
|
|
#define NMI_STACK 3
|
|
#define DEBUG_STACK 4
|
|
#define MCE_STACK 5
|
|
#define N_EXCEPTION_STACKS 5 /* hw limit: 7 */
|
|
|
|
#define LARGE_PAGE_MASK (~(LARGE_PAGE_SIZE-1))
|
|
#define LARGE_PAGE_SIZE (1UL << PMD_SHIFT)
|
|
|
|
#define HPAGE_SHIFT PMD_SHIFT
|
|
#define HPAGE_SIZE ((1UL) << HPAGE_SHIFT)
|
|
#define HPAGE_MASK (~(HPAGE_SIZE - 1))
|
|
#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
|
|
|
|
#ifdef __KERNEL__
|
|
#ifndef __ASSEMBLY__
|
|
|
|
extern unsigned long end_pfn;
|
|
|
|
void clear_page(void *);
|
|
void copy_page(void *, void *);
|
|
|
|
#define clear_user_page(page, vaddr, pg) clear_page(page)
|
|
#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
|
|
|
|
#define alloc_zeroed_user_highpage(vma, vaddr) alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vma, vaddr)
|
|
#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
|
|
/*
|
|
* These are used to make use of C type-checking..
|
|
*/
|
|
typedef struct { unsigned long pte; } pte_t;
|
|
typedef struct { unsigned long pmd; } pmd_t;
|
|
typedef struct { unsigned long pud; } pud_t;
|
|
typedef struct { unsigned long pgd; } pgd_t;
|
|
#define PTE_MASK PHYSICAL_PAGE_MASK
|
|
|
|
typedef struct { unsigned long pgprot; } pgprot_t;
|
|
|
|
#define pte_val(x) ((x).pte)
|
|
#define pmd_val(x) ((x).pmd)
|
|
#define pud_val(x) ((x).pud)
|
|
#define pgd_val(x) ((x).pgd)
|
|
#define pgprot_val(x) ((x).pgprot)
|
|
|
|
#define __pte(x) ((pte_t) { (x) } )
|
|
#define __pmd(x) ((pmd_t) { (x) } )
|
|
#define __pud(x) ((pud_t) { (x) } )
|
|
#define __pgd(x) ((pgd_t) { (x) } )
|
|
#define __pgprot(x) ((pgprot_t) { (x) } )
|
|
|
|
#define __PHYSICAL_START ((unsigned long)CONFIG_PHYSICAL_START)
|
|
#define __START_KERNEL (__START_KERNEL_map + __PHYSICAL_START)
|
|
#define __START_KERNEL_map 0xffffffff80000000UL
|
|
#define __PAGE_OFFSET 0xffff810000000000UL
|
|
|
|
#else
|
|
#define __PHYSICAL_START CONFIG_PHYSICAL_START
|
|
#define __START_KERNEL (__START_KERNEL_map + __PHYSICAL_START)
|
|
#define __START_KERNEL_map 0xffffffff80000000
|
|
#define __PAGE_OFFSET 0xffff810000000000
|
|
#endif /* !__ASSEMBLY__ */
|
|
|
|
/* to align the pointer to the (next) page boundary */
|
|
#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
|
|
|
|
/* See Documentation/x86_64/mm.txt for a description of the memory map. */
|
|
#define __PHYSICAL_MASK_SHIFT 46
|
|
#define __PHYSICAL_MASK ((1UL << __PHYSICAL_MASK_SHIFT) - 1)
|
|
#define __VIRTUAL_MASK_SHIFT 48
|
|
#define __VIRTUAL_MASK ((1UL << __VIRTUAL_MASK_SHIFT) - 1)
|
|
|
|
#define KERNEL_TEXT_SIZE (40UL*1024*1024)
|
|
#define KERNEL_TEXT_START 0xffffffff80000000UL
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#include <asm/bug.h>
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
#define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
|
|
|
|
/* Note: __pa(&symbol_visible_to_c) should be always replaced with __pa_symbol.
|
|
Otherwise you risk miscompilation. */
|
|
#define __pa(x) (((unsigned long)(x)>=__START_KERNEL_map)?(unsigned long)(x) - (unsigned long)__START_KERNEL_map:(unsigned long)(x) - PAGE_OFFSET)
|
|
/* __pa_symbol should be used for C visible symbols.
|
|
This seems to be the official gcc blessed way to do such arithmetic. */
|
|
#define __pa_symbol(x) \
|
|
({unsigned long v; \
|
|
asm("" : "=r" (v) : "0" (x)); \
|
|
__pa(v); })
|
|
|
|
#define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
|
|
#define __boot_va(x) __va(x)
|
|
#define __boot_pa(x) __pa(x)
|
|
#ifdef CONFIG_FLATMEM
|
|
#define pfn_valid(pfn) ((pfn) < end_pfn)
|
|
#endif
|
|
|
|
#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
|
|
#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
|
|
#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
|
|
|
|
#define VM_DATA_DEFAULT_FLAGS \
|
|
(((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \
|
|
VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
|
|
|
|
#define __HAVE_ARCH_GATE_AREA 1
|
|
|
|
#include <asm-generic/memory_model.h>
|
|
#include <asm-generic/page.h>
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* _X86_64_PAGE_H */
|