X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=arch%2Fx86%2Fxen%2Fenlighten.c;h=8e317782fe377c1823f9578ced2a419f0d9b90bb;hb=3b16cf874861436725c43ba0b68bdd799297be7c;hp=c0388220cf9728a8e5b47c6032b0baeef1ed12f9;hpb=03414e57ad9875d0c8bfa5a4a65813cb2157372e;p=linux-2.6-omap-h63xx.git diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c index c0388220cf9..8e317782fe3 100644 --- a/arch/x86/xen/enlighten.c +++ b/arch/x86/xen/enlighten.c @@ -155,7 +155,8 @@ static void xen_cpuid(unsigned int *ax, unsigned int *bx, if (*ax == 1) maskedx = ~((1 << X86_FEATURE_APIC) | /* disable APIC */ (1 << X86_FEATURE_ACPI) | /* disable ACPI */ - (1 << X86_FEATURE_SEP) | /* disable SEP */ + (1 << X86_FEATURE_MCE) | /* disable MCE */ + (1 << X86_FEATURE_MCA) | /* disable MCA */ (1 << X86_FEATURE_ACC)); /* thermal monitoring */ asm(XEN_EMULATE_PREFIX "cpuid" @@ -531,26 +532,37 @@ static void xen_apic_write(unsigned long reg, u32 val) static void xen_flush_tlb(void) { struct mmuext_op *op; - struct multicall_space mcs = xen_mc_entry(sizeof(*op)); + struct multicall_space mcs; + + preempt_disable(); + + mcs = xen_mc_entry(sizeof(*op)); op = mcs.args; op->cmd = MMUEXT_TLB_FLUSH_LOCAL; MULTI_mmuext_op(mcs.mc, op, 1, NULL, DOMID_SELF); xen_mc_issue(PARAVIRT_LAZY_MMU); + + preempt_enable(); } static void xen_flush_tlb_single(unsigned long addr) { struct mmuext_op *op; - struct multicall_space mcs = xen_mc_entry(sizeof(*op)); + struct multicall_space mcs; + + preempt_disable(); + mcs = xen_mc_entry(sizeof(*op)); op = mcs.args; op->cmd = MMUEXT_INVLPG_LOCAL; op->arg1.linear_addr = addr & PAGE_MASK; MULTI_mmuext_op(mcs.mc, op, 1, NULL, DOMID_SELF); xen_mc_issue(PARAVIRT_LAZY_MMU); + + preempt_enable(); } static void xen_flush_tlb_others(const cpumask_t *cpus, struct mm_struct *mm, @@ -655,15 +667,17 @@ static void xen_write_cr3(unsigned long cr3) /* Early in boot, while setting up the initial pagetable, assume everything is pinned. */ -static __init void xen_alloc_pt_init(struct mm_struct *mm, u32 pfn) +static __init void xen_alloc_pte_init(struct mm_struct *mm, u32 pfn) { +#ifdef CONFIG_FLATMEM BUG_ON(mem_map); /* should only be used early */ +#endif make_lowmem_page_readonly(__va(PFN_PHYS(pfn))); } -/* Early release_pt assumes that all pts are pinned, since there's +/* Early release_pte assumes that all pts are pinned, since there's only init_mm and anything attached to that is pinned. */ -static void xen_release_pt_init(u32 pfn) +static void xen_release_pte_init(u32 pfn) { make_lowmem_page_readwrite(__va(PFN_PHYS(pfn))); } @@ -697,12 +711,12 @@ static void xen_alloc_ptpage(struct mm_struct *mm, u32 pfn, unsigned level) } } -static void xen_alloc_pt(struct mm_struct *mm, u32 pfn) +static void xen_alloc_pte(struct mm_struct *mm, u32 pfn) { xen_alloc_ptpage(mm, pfn, PT_PTE); } -static void xen_alloc_pd(struct mm_struct *mm, u32 pfn) +static void xen_alloc_pmd(struct mm_struct *mm, u32 pfn) { xen_alloc_ptpage(mm, pfn, PT_PMD); } @@ -722,12 +736,12 @@ static void xen_release_ptpage(u32 pfn, unsigned level) } } -static void xen_release_pt(u32 pfn) +static void xen_release_pte(u32 pfn) { xen_release_ptpage(pfn, PT_PTE); } -static void xen_release_pd(u32 pfn) +static void xen_release_pmd(u32 pfn) { xen_release_ptpage(pfn, PT_PMD); } @@ -771,38 +785,35 @@ static __init void xen_set_pte_init(pte_t *ptep, pte_t pte) static __init void xen_pagetable_setup_start(pgd_t *base) { pgd_t *xen_pgd = (pgd_t *)xen_start_info->pt_base; + int i; /* special set_pte for pagetable initialization */ pv_mmu_ops.set_pte = xen_set_pte_init; init_mm.pgd = base; /* - * copy top-level of Xen-supplied pagetable into place. For - * !PAE we can use this as-is, but for PAE it is a stand-in - * while we copy the pmd pages. + * copy top-level of Xen-supplied pagetable into place. This + * is a stand-in while we copy the pmd pages. */ memcpy(base, xen_pgd, PTRS_PER_PGD * sizeof(pgd_t)); - if (PTRS_PER_PMD > 1) { - int i; - /* - * For PAE, need to allocate new pmds, rather than - * share Xen's, since Xen doesn't like pmd's being - * shared between address spaces. - */ - for (i = 0; i < PTRS_PER_PGD; i++) { - if (pgd_val_ma(xen_pgd[i]) & _PAGE_PRESENT) { - pmd_t *pmd = (pmd_t *)alloc_bootmem_low_pages(PAGE_SIZE); + /* + * For PAE, need to allocate new pmds, rather than + * share Xen's, since Xen doesn't like pmd's being + * shared between address spaces. + */ + for (i = 0; i < PTRS_PER_PGD; i++) { + if (pgd_val_ma(xen_pgd[i]) & _PAGE_PRESENT) { + pmd_t *pmd = (pmd_t *)alloc_bootmem_low_pages(PAGE_SIZE); - memcpy(pmd, (void *)pgd_page_vaddr(xen_pgd[i]), - PAGE_SIZE); + memcpy(pmd, (void *)pgd_page_vaddr(xen_pgd[i]), + PAGE_SIZE); - make_lowmem_page_readonly(pmd); + make_lowmem_page_readonly(pmd); - set_pgd(&base[i], __pgd(1 + __pa(pmd))); - } else - pgd_clear(&base[i]); - } + set_pgd(&base[i], __pgd(1 + __pa(pmd))); + } else + pgd_clear(&base[i]); } /* make sure zero_page is mapped RO so we can use it in pagetables */ @@ -849,27 +860,17 @@ static __init void xen_pagetable_setup_done(pgd_t *base) { /* This will work as long as patching hasn't happened yet (which it hasn't) */ - pv_mmu_ops.alloc_pt = xen_alloc_pt; - pv_mmu_ops.alloc_pd = xen_alloc_pd; - pv_mmu_ops.release_pt = xen_release_pt; - pv_mmu_ops.release_pd = xen_release_pd; + pv_mmu_ops.alloc_pte = xen_alloc_pte; + pv_mmu_ops.alloc_pmd = xen_alloc_pmd; + pv_mmu_ops.release_pte = xen_release_pte; + pv_mmu_ops.release_pmd = xen_release_pmd; pv_mmu_ops.set_pte = xen_set_pte; setup_shared_info(); /* Actually pin the pagetable down, but we can't set PG_pinned yet because the page structures don't exist yet. */ - { - unsigned level; - -#ifdef CONFIG_X86_PAE - level = MMUEXT_PIN_L3_TABLE; -#else - level = MMUEXT_PIN_L2_TABLE; -#endif - - pin_pagetable_pfn(level, PFN_DOWN(__pa(base))); - } + pin_pagetable_pfn(MMUEXT_PIN_L3_TABLE, PFN_DOWN(__pa(base))); } /* This is called once we have the cpu_possible_map */ @@ -994,7 +995,7 @@ static const struct pv_cpu_ops xen_cpu_ops __initdata = { .read_pmc = native_read_pmc, .iret = xen_iret, - .irq_enable_syscall_ret = NULL, /* never called */ + .irq_enable_syscall_ret = xen_sysexit, .load_tr_desc = paravirt_nop, .set_ldt = xen_set_ldt, @@ -1059,11 +1060,11 @@ static const struct pv_mmu_ops xen_mmu_ops __initdata = { .pte_update = paravirt_nop, .pte_update_defer = paravirt_nop, - .alloc_pt = xen_alloc_pt_init, - .release_pt = xen_release_pt_init, - .alloc_pd = xen_alloc_pt_init, - .alloc_pd_clone = paravirt_nop, - .release_pd = xen_release_pt_init, + .alloc_pte = xen_alloc_pte_init, + .release_pte = xen_release_pte_init, + .alloc_pmd = xen_alloc_pte_init, + .alloc_pmd_clone = paravirt_nop, + .release_pmd = xen_release_pte_init, #ifdef CONFIG_HIGHPTE .kmap_atomic_pte = xen_kmap_atomic_pte, @@ -1079,7 +1080,6 @@ static const struct pv_mmu_ops xen_mmu_ops __initdata = { .make_pte = xen_make_pte, .make_pgd = xen_make_pgd, -#ifdef CONFIG_X86_PAE .set_pte_atomic = xen_set_pte_atomic, .set_pte_present = xen_set_pte_at, .set_pud = xen_set_pud, @@ -1088,7 +1088,6 @@ static const struct pv_mmu_ops xen_mmu_ops __initdata = { .make_pmd = xen_make_pmd, .pmd_val = xen_pmd_val, -#endif /* PAE */ .activate_mm = xen_activate_mm, .dup_mmap = xen_dup_mmap, @@ -1109,7 +1108,9 @@ static const struct smp_ops xen_smp_ops __initdata = { .smp_send_stop = xen_smp_send_stop, .smp_send_reschedule = xen_smp_send_reschedule, - .smp_call_function_mask = xen_smp_call_function_mask, + + .send_call_func_ipi = xen_smp_send_call_function_ipi, + .send_call_func_single_ipi = xen_smp_send_call_function_single_ipi, }; #endif /* CONFIG_SMP */ @@ -1214,6 +1215,11 @@ asmlinkage void __init xen_start_kernel(void) if (xen_feature(XENFEAT_supervisor_mode_kernel)) pv_info.kernel_rpl = 0; + /* Prevent unwanted bits from being set in PTEs. */ + __supported_pte_mask &= ~_PAGE_GLOBAL; + if (!is_initial_xendomain()) + __supported_pte_mask &= ~(_PAGE_PWT | _PAGE_PCD); + /* set the limit of our address space */ xen_reserve_top();