memory contents and reserves bad memory
regions that are detected.
+ mem_encrypt= [X86-64] AMD Secure Memory Encryption (SME) control
+ Valid arguments: on, off
+ Default (depends on kernel configuration option):
+ on (CONFIG_AMD_MEM_ENCRYPT_ACTIVE_BY_DEFAULT=y)
+ off (CONFIG_AMD_MEM_ENCRYPT_ACTIVE_BY_DEFAULT=n)
+ mem_encrypt=on: Activate SME
+ mem_encrypt=off: Do not activate SME
+
+ Refer to Documentation/x86/amd-memory-encryption.txt
+ for details on when memory encryption can be activated.
+
mem_sleep_default= [SUSPEND] Default system suspend mode:
s2idle - Suspend-To-Idle
shallow - Power-On Suspend or equivalent (if supported)
In kernels built with CONFIG_NO_HZ_FULL=y, set
the specified list of CPUs whose tick will be stopped
whenever possible. The boot CPU will be forced outside
- the range to maintain the timekeeping.
- The CPUs in this range must also be included in the
- rcu_nocbs= set.
+ the range to maintain the timekeeping. Any CPUs
+ in this list will have their RCU callbacks offloaded,
+ just as if they had also been called out in the
+ rcu_nocbs= boot parameter.
noiotrap [SH] Disables trapped I/O port accesses.
nopat [X86] Disable PAT (page attribute table extension of
pagetables) support.
+ nopcid [X86-64] Disable the PCID cpu feature.
+
norandmaps Don't use address space randomization. Equivalent to
echo 0 > /proc/sys/kernel/randomize_va_space
Run specified binary instead of /init from the ramdisk,
used for early userspace startup. See initrd.
+ rdt= [HW,X86,RDT]
+ Turn on/off individual RDT features. List is:
+ cmt, mbmtotal, mbmlocal, l3cat, l3cdp, l2cat, mba.
+ E.g. to turn on cmt and turn off mba use:
+ rdt=cmt,!mba
+
reboot= [KNL]
Format (x86 or x86_64):
[w[arm] | c[old] | h[ard] | s[oft] | g[pio]] \
decrease the size and leave more room for directly
mapped kernel RAM.
+ vmcp_cma=nn[MG] [KNL,S390]
+ Sets the memory size reserved for contiguous memory
+ allocations for the vmcp device driver.
+
vmhalt= [KNL,S390] Perform z/VM CP command after system halt.
Format: <command>
#include <linux/mm_types.h>
#include <asm/tlbflush.h>
#include <asm/ctl_reg.h>
+ #include <asm-generic/mm_hooks.h>
static inline int init_new_context(struct task_struct *tsk,
struct mm_struct *mm)
mm->context.use_cmma = 0;
#endif
switch (mm->context.asce_limit) {
- case 1UL << 42:
+ case _REGION2_SIZE:
/*
* forked 3-level task, fall through to set new asce with new
* mm->pgd
mm->context.asce = __pa(mm->pgd) | _ASCE_TABLE_LENGTH |
_ASCE_USER_BITS | _ASCE_TYPE_REGION3;
break;
- case 1UL << 53:
+ case -PAGE_SIZE:
+ /* forked 5-level task, set new asce with new_mm->pgd */
+ mm->context.asce = __pa(mm->pgd) | _ASCE_TABLE_LENGTH |
+ _ASCE_USER_BITS | _ASCE_TYPE_REGION1;
+ break;
+ case _REGION1_SIZE:
/* forked 4-level task, set new asce with new mm->pgd */
mm->context.asce = __pa(mm->pgd) | _ASCE_TABLE_LENGTH |
_ASCE_USER_BITS | _ASCE_TYPE_REGION2;
break;
- case 1UL << 31:
+ case _REGION3_SIZE:
/* forked 2-level compat task, set new asce with new mm->pgd */
mm->context.asce = __pa(mm->pgd) | _ASCE_TABLE_LENGTH |
_ASCE_USER_BITS | _ASCE_TYPE_SEGMENT;
set_user_asce(next);
}
- static inline void arch_dup_mmap(struct mm_struct *oldmm,
- struct mm_struct *mm)
- {
- }
-
- static inline void arch_exit_mmap(struct mm_struct *mm)
- {
- }
-
- static inline void arch_unmap(struct mm_struct *mm,
- struct vm_area_struct *vma,
- unsigned long start, unsigned long end)
- {
- }
-
- static inline void arch_bprm_mm_init(struct mm_struct *mm,
- struct vm_area_struct *vma)
- {
- }
-
- static inline bool arch_vma_access_permitted(struct vm_area_struct *vma,
- bool write, bool execute, bool foreign)
- {
- /* by default, allow everything */
- return true;
- }
#endif /* __S390_MMU_CONTEXT_H */
{
typecheck(int, lp->lock);
asm volatile(
- "st %1,%0\n"
- : "+Q" (lp->lock)
- : "d" (0)
- : "cc", "memory");
+ #ifdef CONFIG_HAVE_MARCH_ZEC12_FEATURES
+ " .long 0xb2fa0070\n" /* NIAI 7 */
+ #endif
+ " st %1,%0\n"
+ : "=Q" (lp->lock) : "d" (0) : "cc", "memory");
}
-static inline void arch_spin_unlock_wait(arch_spinlock_t *lock)
-{
- while (arch_spin_is_locked(lock))
- arch_spin_relax(lock);
- smp_acquire__after_ctrl_dep();
-}
-
/*
* Read-write spinlocks, allowing multiple readers
* but only one writer.
extern void tlb_table_flush(struct mmu_gather *tlb);
extern void tlb_remove_table(struct mmu_gather *tlb, void *table);
-static inline void tlb_gather_mmu(struct mmu_gather *tlb,
- struct mm_struct *mm,
- unsigned long start,
- unsigned long end)
+static inline void
+arch_tlb_gather_mmu(struct mmu_gather *tlb, struct mm_struct *mm,
+ unsigned long start, unsigned long end)
{
tlb->mm = mm;
tlb->start = start;
tlb_flush_mmu_free(tlb);
}
-static inline void tlb_finish_mmu(struct mmu_gather *tlb,
- unsigned long start, unsigned long end)
+static inline void
+arch_tlb_finish_mmu(struct mmu_gather *tlb,
+ unsigned long start, unsigned long end, bool force)
{
+ if (force) {
+ tlb->start = start;
+ tlb->end = end;
+ }
+
tlb_flush_mmu(tlb);
}
static inline void pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd,
unsigned long address)
{
- if (tlb->mm->context.asce_limit <= (1UL << 31))
+ if (tlb->mm->context.asce_limit <= _REGION3_SIZE)
return;
pgtable_pmd_page_dtor(virt_to_page(pmd));
tlb_remove_table(tlb, pmd);
static inline void p4d_free_tlb(struct mmu_gather *tlb, p4d_t *p4d,
unsigned long address)
{
- if (tlb->mm->context.asce_limit <= (1UL << 53))
+ if (tlb->mm->context.asce_limit <= _REGION1_SIZE)
return;
tlb_remove_table(tlb, p4d);
}
static inline void pud_free_tlb(struct mmu_gather *tlb, pud_t *pud,
unsigned long address)
{
- if (tlb->mm->context.asce_limit <= (1UL << 42))
+ if (tlb->mm->context.asce_limit <= _REGION2_SIZE)
return;
tlb_remove_table(tlb, pud);
}
projects / mirror_ubuntu-bionic-kernel.git / commitdiff