diff options
Diffstat (limited to 'arch/x86/kernel/vmi_32.c')
| -rw-r--r-- | arch/x86/kernel/vmi_32.c | 893 |
1 files changed, 0 insertions, 893 deletions
diff --git a/arch/x86/kernel/vmi_32.c b/arch/x86/kernel/vmi_32.c deleted file mode 100644 index ce9fbacb7526..000000000000 --- a/arch/x86/kernel/vmi_32.c +++ /dev/null @@ -1,893 +0,0 @@ -/* - * VMI specific paravirt-ops implementation - * - * Copyright (C) 2005, VMware, Inc. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for more - * details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - * - * Send feedback to zach@vmware.com - * - */ - -#include <linux/module.h> -#include <linux/cpu.h> -#include <linux/bootmem.h> -#include <linux/mm.h> -#include <linux/highmem.h> -#include <linux/sched.h> -#include <linux/gfp.h> -#include <asm/vmi.h> -#include <asm/io.h> -#include <asm/fixmap.h> -#include <asm/apicdef.h> -#include <asm/apic.h> -#include <asm/pgalloc.h> -#include <asm/processor.h> -#include <asm/timer.h> -#include <asm/vmi_time.h> -#include <asm/kmap_types.h> -#include <asm/setup.h> - -/* Convenient for calling VMI functions indirectly in the ROM */ -typedef u32 __attribute__((regparm(1))) (VROMFUNC)(void); -typedef u64 __attribute__((regparm(2))) (VROMLONGFUNC)(int); - -#define call_vrom_func(rom,func) \ - (((VROMFUNC *)(rom->func))()) - -#define call_vrom_long_func(rom,func,arg) \ - (((VROMLONGFUNC *)(rom->func)) (arg)) - -static struct vrom_header *vmi_rom; -static int disable_pge; -static int disable_pse; -static int disable_sep; -static int disable_tsc; -static int disable_mtrr; -static int disable_noidle; -static int disable_vmi_timer; - -/* Cached VMI operations */ -static struct { - void (*cpuid)(void /* non-c */); - void (*_set_ldt)(u32 selector); - void (*set_tr)(u32 selector); - void (*write_idt_entry)(struct desc_struct *, int, u32, u32); - void (*write_gdt_entry)(struct desc_struct *, int, u32, u32); - void (*write_ldt_entry)(struct desc_struct *, int, u32, u32); - void (*set_kernel_stack)(u32 selector, u32 sp0); - void (*allocate_page)(u32, u32, u32, u32, u32); - void (*release_page)(u32, u32); - void (*set_pte)(pte_t, pte_t *, unsigned); - void (*update_pte)(pte_t *, unsigned); - void (*set_linear_mapping)(int, void *, u32, u32); - void (*_flush_tlb)(int); - void (*set_initial_ap_state)(int, int); - void (*halt)(void); - void (*set_lazy_mode)(int mode); -} vmi_ops; - -/* Cached VMI operations */ -struct vmi_timer_ops vmi_timer_ops; - -/* - * VMI patching routines. - */ -#define MNEM_CALL 0xe8 -#define MNEM_JMP 0xe9 -#define MNEM_RET 0xc3 - -#define IRQ_PATCH_INT_MASK 0 -#define IRQ_PATCH_DISABLE 5 - -static inline void patch_offset(void *insnbuf, - unsigned long ip, unsigned long dest) -{ - *(unsigned long *)(insnbuf+1) = dest-ip-5; -} - -static unsigned patch_internal(int call, unsigned len, void *insnbuf, - unsigned long ip) -{ - u64 reloc; - struct vmi_relocation_info *const rel = (struct vmi_relocation_info *)&reloc; - reloc = call_vrom_long_func(vmi_rom, get_reloc, call); - switch(rel->type) { - case VMI_RELOCATION_CALL_REL: - BUG_ON(len < 5); - *(char *)insnbuf = MNEM_CALL; - patch_offset(insnbuf, ip, (unsigned long)rel->eip); - return 5; - - case VMI_RELOCATION_JUMP_REL: - BUG_ON(len < 5); - *(char *)insnbuf = MNEM_JMP; - patch_offset(insnbuf, ip, (unsigned long)rel->eip); - return 5; - - case VMI_RELOCATION_NOP: - /* obliterate the whole thing */ - return 0; - - case VMI_RELOCATION_NONE: - /* leave native code in place */ - break; - - default: - BUG(); - } - return len; -} - -/* - * Apply patch if appropriate, return length of new instruction - * sequence. The callee does nop padding for us. - */ -static unsigned vmi_patch(u8 type, u16 clobbers, void *insns, - unsigned long ip, unsigned len) -{ - switch (type) { - case PARAVIRT_PATCH(pv_irq_ops.irq_disable): - return patch_internal(VMI_CALL_DisableInterrupts, len, - insns, ip); - case PARAVIRT_PATCH(pv_irq_ops.irq_enable): - return patch_internal(VMI_CALL_EnableInterrupts, len, - insns, ip); - case PARAVIRT_PATCH(pv_irq_ops.restore_fl): - return patch_internal(VMI_CALL_SetInterruptMask, len, - insns, ip); - case PARAVIRT_PATCH(pv_irq_ops.save_fl): - return patch_internal(VMI_CALL_GetInterruptMask, len, - insns, ip); - case PARAVIRT_PATCH(pv_cpu_ops.iret): - return patch_internal(VMI_CALL_IRET, len, insns, ip); - case PARAVIRT_PATCH(pv_cpu_ops.irq_enable_sysexit): - return patch_internal(VMI_CALL_SYSEXIT, len, insns, ip); - default: - break; - } - return len; -} - -/* CPUID has non-C semantics, and paravirt-ops API doesn't match hardware ISA */ -static void vmi_cpuid(unsigned int *ax, unsigned int *bx, - unsigned int *cx, unsigned int *dx) -{ - int override = 0; - if (*ax == 1) - override = 1; - asm volatile ("call *%6" - : "=a" (*ax), - "=b" (*bx), - "=c" (*cx), - "=d" (*dx) - : "0" (*ax), "2" (*cx), "r" (vmi_ops.cpuid)); - if (override) { - if (disable_pse) - *dx &= ~X86_FEATURE_PSE; - if (disable_pge) - *dx &= ~X86_FEATURE_PGE; - if (disable_sep) - *dx &= ~X86_FEATURE_SEP; - if (disable_tsc) - *dx &= ~X86_FEATURE_TSC; - if (disable_mtrr) - *dx &= ~X86_FEATURE_MTRR; - } -} - -static inline void vmi_maybe_load_tls(struct desc_struct *gdt, int nr, struct desc_struct *new) -{ - if (gdt[nr].a != new->a || gdt[nr].b != new->b) - write_gdt_entry(gdt, nr, new, 0); -} - -static void vmi_load_tls(struct thread_struct *t, unsigned int cpu) -{ - struct desc_struct *gdt = get_cpu_gdt_table(cpu); - vmi_maybe_load_tls(gdt, GDT_ENTRY_TLS_MIN + 0, &t->tls_array[0]); - vmi_maybe_load_tls(gdt, GDT_ENTRY_TLS_MIN + 1, &t->tls_array[1]); - vmi_maybe_load_tls(gdt, GDT_ENTRY_TLS_MIN + 2, &t->tls_array[2]); -} - -static void vmi_set_ldt(const void *addr, unsigned entries) -{ - unsigned cpu = smp_processor_id(); - struct desc_struct desc; - - pack_descriptor(&desc, (unsigned long)addr, - entries * sizeof(struct desc_struct) - 1, - DESC_LDT, 0); - write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT, &desc, DESC_LDT); - vmi_ops._set_ldt(entries ? GDT_ENTRY_LDT*sizeof(struct desc_struct) : 0); -} - -static void vmi_set_tr(void) -{ - vmi_ops.set_tr(GDT_ENTRY_TSS*sizeof(struct desc_struct)); -} - -static void vmi_write_idt_entry(gate_desc *dt, int entry, const gate_desc *g) -{ - u32 *idt_entry = (u32 *)g; - vmi_ops.write_idt_entry(dt, entry, idt_entry[0], idt_entry[1]); -} - -static void vmi_write_gdt_entry(struct desc_struct *dt, int entry, - const void *desc, int type) -{ - u32 *gdt_entry = (u32 *)desc; - vmi_ops.write_gdt_entry(dt, entry, gdt_entry[0], gdt_entry[1]); -} - -static void vmi_write_ldt_entry(struct desc_struct *dt, int entry, - const void *desc) -{ - u32 *ldt_entry = (u32 *)desc; - vmi_ops.write_ldt_entry(dt, entry, ldt_entry[0], ldt_entry[1]); -} - -static void vmi_load_sp0(struct tss_struct *tss, - struct thread_struct *thread) -{ - tss->x86_tss.sp0 = thread->sp0; - - /* This can only happen when SEP is enabled, no need to test "SEP"arately */ - if (unlikely(tss->x86_tss.ss1 != thread->sysenter_cs)) { - tss->x86_tss.ss1 = thread->sysenter_cs; - wrmsr(MSR_IA32_SYSENTER_CS, thread->sysenter_cs, 0); - } - vmi_ops.set_kernel_stack(__KERNEL_DS, tss->x86_tss.sp0); -} - -static void vmi_flush_tlb_user(void) -{ - vmi_ops._flush_tlb(VMI_FLUSH_TLB); -} - -static void vmi_flush_tlb_kernel(void) -{ - vmi_ops._flush_tlb(VMI_FLUSH_TLB | VMI_FLUSH_GLOBAL); -} - -/* Stub to do nothing at all; used for delays and unimplemented calls */ -static void vmi_nop(void) -{ -} - -static void vmi_allocate_pte(struct mm_struct *mm, unsigned long pfn) -{ - vmi_ops.allocate_page(pfn, VMI_PAGE_L1, 0, 0, 0); -} - -static void vmi_allocate_pmd(struct mm_struct *mm, unsigned long pfn) -{ - /* - * This call comes in very early, before mem_map is setup. - * It is called only for swapper_pg_dir, which already has - * data on it. - */ - vmi_ops.allocate_page(pfn, VMI_PAGE_L2, 0, 0, 0); -} - -static void vmi_allocate_pmd_clone(unsigned long pfn, unsigned long clonepfn, unsigned long start, unsigned long count) -{ - vmi_ops.allocate_page(pfn, VMI_PAGE_L2 | VMI_PAGE_CLONE, clonepfn, start, count); -} - -static void vmi_release_pte(unsigned long pfn) -{ - vmi_ops.release_page(pfn, VMI_PAGE_L1); -} - -static void vmi_release_pmd(unsigned long pfn) -{ - vmi_ops.release_page(pfn, VMI_PAGE_L2); -} - -/* - * We use the pgd_free hook for releasing the pgd page: - */ -static void vmi_pgd_free(struct mm_struct *mm, pgd_t *pgd) -{ - unsigned long pfn = __pa(pgd) >> PAGE_SHIFT; - - vmi_ops.release_page(pfn, VMI_PAGE_L2); -} - -/* - * Helper macros for MMU update flags. We can defer updates until a flush - * or page invalidation only if the update is to the current address space - * (otherwise, there is no flush). We must check against init_mm, since - * this could be a kernel update, which usually passes init_mm, although - * sometimes this check can be skipped if we know the particular function - * is only called on user mode PTEs. We could change the kernel to pass - * current->active_mm here, but in particular, I was unsure if changing - * mm/highmem.c to do this would still be correct on other architectures. - */ -#define is_current_as(mm, mustbeuser) ((mm) == current->active_mm || \ - (!mustbeuser && (mm) == &init_mm)) -#define vmi_flags_addr(mm, addr, level, user) \ - ((level) | (is_current_as(mm, user) ? \ - (VMI_PAGE_CURRENT_AS | ((addr) & VMI_PAGE_VA_MASK)) : 0)) -#define vmi_flags_addr_defer(mm, addr, level, user) \ - ((level) | (is_current_as(mm, user) ? \ - (VMI_PAGE_DEFER | VMI_PAGE_CURRENT_AS | ((addr) & VMI_PAGE_VA_MASK)) : 0)) - -static void vmi_update_pte(struct mm_struct *mm, unsigned long addr, pte_t *ptep) -{ - vmi_ops.update_pte(ptep, vmi_flags_addr(mm, addr, VMI_PAGE_PT, 0)); -} - -static void vmi_update_pte_defer(struct mm_struct *mm, unsigned long addr, pte_t *ptep) -{ - vmi_ops.update_pte(ptep, vmi_flags_addr_defer(mm, addr, VMI_PAGE_PT, 0)); -} - -static void vmi_set_pte(pte_t *ptep, pte_t pte) -{ - /* XXX because of set_pmd_pte, this can be called on PT or PD layers */ - vmi_ops.set_pte(pte, ptep, VMI_PAGE_PT); -} - -static void vmi_set_pte_at(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte) -{ - vmi_ops.set_pte(pte, ptep, vmi_flags_addr(mm, addr, VMI_PAGE_PT, 0)); -} - -static void vmi_set_pmd(pmd_t *pmdp, pmd_t pmdval) -{ -#ifdef CONFIG_X86_PAE - const pte_t pte = { .pte = pmdval.pmd }; -#else - const pte_t pte = { pmdval.pud.pgd.pgd }; -#endif - vmi_ops.set_pte(pte, (pte_t *)pmdp, VMI_PAGE_PD); -} - -#ifdef CONFIG_X86_PAE - -static void vmi_set_pte_atomic(pte_t *ptep, pte_t pteval) -{ - /* - * XXX This is called from set_pmd_pte, but at both PT - * and PD layers so the VMI_PAGE_PT flag is wrong. But - * it is only called for large page mapping changes, - * the Xen backend, doesn't support large pages, and the - * ESX backend doesn't depend on the flag. - */ - set_64bit((unsigned long long *)ptep,pte_val(pteval)); - vmi_ops.update_pte(ptep, VMI_PAGE_PT); -} - -static void vmi_set_pud(pud_t *pudp, pud_t pudval) -{ - /* Um, eww */ - const pte_t pte = { .pte = pudval.pgd.pgd }; - vmi_ops.set_pte(pte, (pte_t *)pudp, VMI_PAGE_PDP); -} - -static void vmi_pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep) -{ - const pte_t pte = { .pte = 0 }; - vmi_ops.set_pte(pte, ptep, vmi_flags_addr(mm, addr, VMI_PAGE_PT, 0)); -} - -static void vmi_pmd_clear(pmd_t *pmd) -{ - const pte_t pte = { .pte = 0 }; - vmi_ops.set_pte(pte, (pte_t *)pmd, VMI_PAGE_PD); -} -#endif - -#ifdef CONFIG_SMP -static void __devinit -vmi_startup_ipi_hook(int phys_apicid, unsigned long start_eip, - unsigned long start_esp) -{ - struct vmi_ap_state ap; - - /* Default everything to zero. This is fine for most GPRs. */ - memset(&ap, 0, sizeof(struct vmi_ap_state)); - - ap.gdtr_limit = GDT_SIZE - 1; - ap.gdtr_base = (unsigned long) get_cpu_gdt_table(phys_apicid); - - ap.idtr_limit = IDT_ENTRIES * 8 - 1; - ap.idtr_base = (unsigned long) idt_table; - - ap.ldtr = 0; - - ap.cs = __KERNEL_CS; - ap.eip = (unsigned long) start_eip; - ap.ss = __KERNEL_DS; - ap.esp = (unsigned long) start_esp; - - ap.ds = __USER_DS; - ap.es = __USER_DS; - ap.fs = __KERNEL_PERCPU; - ap.gs = __KERNEL_STACK_CANARY; - - ap.eflags = 0; - -#ifdef CONFIG_X86_PAE - /* efer should match BSP efer. */ - if (cpu_has_nx) { - unsigned l, h; - rdmsr(MSR_EFER, l, h); - ap.efer = (unsigned long long) h << 32 | l; - } -#endif - - ap.cr3 = __pa(swapper_pg_dir); - /* Protected mode, paging, AM, WP, NE, MP. */ - ap.cr0 = 0x80050023; - ap.cr4 = mmu_cr4_features; - vmi_ops.set_initial_ap_state((u32)&ap, phys_apicid); -} -#endif - -static void vmi_start_context_switch(struct task_struct *prev) -{ - paravirt_start_context_switch(prev); - vmi_ops.set_lazy_mode(2); -} - -static void vmi_end_context_switch(struct task_struct *next) -{ - vmi_ops.set_lazy_mode(0); - paravirt_end_context_switch(next); -} - -static void vmi_enter_lazy_mmu(void) -{ - paravirt_enter_lazy_mmu(); - vmi_ops.set_lazy_mode(1); -} - -static void vmi_leave_lazy_mmu(void) -{ - vmi_ops.set_lazy_mode(0); - paravirt_leave_lazy_mmu(); -} - -static inline int __init check_vmi_rom(struct vrom_header *rom) -{ - struct pci_header *pci; - struct pnp_header *pnp; - const char *manufacturer = "UNKNOWN"; - const char *product = "UNKNOWN"; - const char *license = "unspecified"; - - if (rom->rom_signature != 0xaa55) - return 0; - if (rom->vrom_signature != VMI_SIGNATURE) - return 0; - if (rom->api_version_maj != VMI_API_REV_MAJOR || - rom->api_version_min+1 < VMI_API_REV_MINOR+1) { - printk(KERN_WARNING "VMI: Found mismatched rom version %d.%d\n", - rom->api_version_maj, - rom->api_version_min); - return 0; - } - - /* - * Relying on the VMI_SIGNATURE field is not 100% safe, so check - * the PCI header and device type to make sure this is really a - * VMI device. - */ - if (!rom->pci_header_offs) { - printk(KERN_WARNING "VMI: ROM does not contain PCI header.\n"); - return 0; - } - - pci = (struct pci_header *)((char *)rom+rom->pci_header_offs); - if (pci->vendorID != PCI_VENDOR_ID_VMWARE || - pci->deviceID != PCI_DEVICE_ID_VMWARE_VMI) { - /* Allow it to run... anyways, but warn */ - printk(KERN_WARNING "VMI: ROM from unknown manufacturer\n"); - } - - if (rom->pnp_header_offs) { - pnp = (struct pnp_header *)((char *)rom+rom->pnp_header_offs); - if (pnp->manufacturer_offset) - manufacturer = (const char *)rom+pnp->manufacturer_offset; - if (pnp->product_offset) - product = (const char *)rom+pnp->product_offset; - } - - if (rom->license_offs) - license = (char *)rom+rom->license_offs; - - printk(KERN_INFO "VMI: Found %s %s, API version %d.%d, ROM version %d.%d\n", - manufacturer, product, - rom->api_version_maj, rom->api_version_min, - pci->rom_version_maj, pci->rom_version_min); - - /* Don't allow BSD/MIT here for now because we don't want to end up - with any binary only shim layers */ - if (strcmp(license, "GPL") && strcmp(license, "GPL v2")) { - printk(KERN_WARNING "VMI: Non GPL license `%s' found for ROM. Not used.\n", - license); - return 0; - } - - return 1; -} - -/* - * Probe for the VMI option ROM - */ -static inline int __init probe_vmi_rom(void) -{ - unsigned long base; - - /* VMI ROM is in option ROM area, check signature */ - for (base = 0xC0000; base < 0xE0000; base += 2048) { - struct vrom_header *romstart; - romstart = (struct vrom_header *)isa_bus_to_virt(base); - if (check_vmi_rom(romstart)) { - vmi_rom = romstart; - return 1; - } - } - return 0; -} - -/* - * VMI setup common to all processors - */ -void vmi_bringup(void) -{ - /* We must establish the lowmem mapping for MMU ops to work */ - if (vmi_ops.set_linear_mapping) - vmi_ops.set_linear_mapping(0, (void *)__PAGE_OFFSET, MAXMEM_PFN, 0); -} - -/* - * Return a pointer to a VMI function or NULL if unimplemented - */ -static void *vmi_get_function(int vmicall) -{ - u64 reloc; - const struct vmi_relocation_info *rel = (struct vmi_relocation_info *)&reloc; - reloc = call_vrom_long_func(vmi_rom, get_reloc, vmicall); - BUG_ON(rel->type == VMI_RELOCATION_JUMP_REL); - if (rel->type == VMI_RELOCATION_CALL_REL) - return (void *)rel->eip; - else - return NULL; -} - -/* - * Helper macro for making the VMI paravirt-ops fill code readable. - * For unimplemented operations, fall back to default, unless nop - * is returned by the ROM. - */ -#define para_fill(opname, vmicall) \ -do { \ - reloc = call_vrom_long_func(vmi_rom, get_reloc, \ - VMI_CALL_##vmicall); \ - if (rel->type == VMI_RELOCATION_CALL_REL) \ - opname = (void *)rel->eip; \ - else if (rel->type == VMI_RELOCATION_NOP) \ - opname = (void *)vmi_nop; \ - else if (rel->type != VMI_RELOCATION_NONE) \ - printk(KERN_WARNING "VMI: Unknown relocation " \ - "type %d for " #vmicall"\n",\ - rel->type); \ -} while (0) - -/* - * Helper macro for making the VMI paravirt-ops fill code readable. - * For cached operations which do not match the VMI ROM ABI and must - * go through a tranlation stub. Ignore NOPs, since it is not clear - * a NOP * VMI function corresponds to a NOP paravirt-op when the - * functions are not in 1-1 correspondence. - */ -#define para_wrap(opname, wrapper, cache, vmicall) \ -do { \ - reloc = call_vrom_long_func(vmi_rom, get_reloc, \ - VMI_CALL_##vmicall); \ - BUG_ON(rel->type == VMI_RELOCATION_JUMP_REL); \ - if (rel->type == VMI_RELOCATION_CALL_REL) { \ - opname = wrapper; \ - vmi_ops.cache = (void *)rel->eip; \ - } \ -} while (0) - -/* - * Activate the VMI interface and switch into paravirtualized mode - */ -static inline int __init activate_vmi(void) -{ - short kernel_cs; - u64 reloc; - const struct vmi_relocation_info *rel = (struct vmi_relocation_info *)&reloc; - - /* - * Prevent page tables from being allocated in highmem, even if - * CONFIG_HIGHPTE is enabled. - */ - __userpte_alloc_gfp &= ~__GFP_HIGHMEM; - - if (call_vrom_func(vmi_rom, vmi_init) != 0) { - printk(KERN_ERR "VMI ROM failed to initialize!"); - return 0; - } - savesegment(cs, kernel_cs); - - pv_info.paravirt_enabled = 1; - pv_info.kernel_rpl = kernel_cs & SEGMENT_RPL_MASK; - pv_info.name = "vmi [deprecated]"; - - pv_init_ops.patch = vmi_patch; - - /* - * Many of these operations are ABI compatible with VMI. - * This means we can fill in the paravirt-ops with direct - * pointers into the VMI ROM. If the calling convention for - * these operations changes, this code needs to be updated. - * - * Exceptions - * CPUID paravirt-op uses pointers, not the native ISA - * halt has no VMI equivalent; all VMI halts are "safe" - * no MSR support yet - just trap and emulate. VMI uses the - * same ABI as the native ISA, but Linux wants exceptions - * from bogus MSR read / write handled - * rdpmc is not yet used in Linux - */ - - /* CPUID is special, so very special it gets wrapped like a present */ - para_wrap(pv_cpu_ops.cpuid, vmi_cpuid, cpuid, CPUID); - - para_fill(pv_cpu_ops.clts, CLTS); - para_fill(pv_cpu_ops.get_debugreg, GetDR); - para_fill(pv_cpu_ops.set_debugreg, SetDR); - para_fill(pv_cpu_ops.read_cr0, GetCR0); - para_fill(pv_mmu_ops.read_cr2, GetCR2); - para_fill(pv_mmu_ops.read_cr3, GetCR3); - para_fill(pv_cpu_ops.read_cr4, GetCR4); - para_fill(pv_cpu_ops.write_cr0, SetCR0); - para_fill(pv_mmu_ops.write_cr2, SetCR2); - para_fill(pv_mmu_ops.write_cr3, SetCR3); - para_fill(pv_cpu_ops.write_cr4, SetCR4); - - para_fill(pv_irq_ops.save_fl.func, GetInterruptMask); - para_fill(pv_irq_ops.restore_fl.func, SetInterruptMask); - para_fill(pv_irq_ops.irq_disable.func, DisableInterrupts); - para_fill(pv_irq_ops.irq_enable.func, EnableInterrupts); - - para_fill(pv_cpu_ops.wbinvd, WBINVD); - para_fill(pv_cpu_ops.read_tsc, RDTSC); - - /* The following we emulate with trap and emulate for now */ - /* paravirt_ops.read_msr = vmi_rdmsr */ - /* paravirt_ops.write_msr = vmi_wrmsr */ - /* paravirt_ops.rdpmc = vmi_rdpmc */ - - /* TR interface doesn't pass TR value, wrap */ - para_wrap(pv_cpu_ops.load_tr_desc, vmi_set_tr, set_tr, SetTR); - - /* LDT is special, too */ - para_wrap(pv_cpu_ops.set_ldt, vmi_set_ldt, _set_ldt, SetLDT); - - para_fill(pv_cpu_ops.load_gdt, SetGDT); - para_fill(pv_cpu_ops.load_idt, SetIDT); - para_fill(pv_cpu_ops.store_gdt, GetGDT); - para_fill(pv_cpu_ops.store_idt, GetIDT); - para_fill(pv_cpu_ops.store_tr, GetTR); - pv_cpu_ops.load_tls = vmi_load_tls; - para_wrap(pv_cpu_ops.write_ldt_entry, vmi_write_ldt_entry, - write_ldt_entry, WriteLDTEntry); - para_wrap(pv_cpu_ops.write_gdt_entry, vmi_write_gdt_entry, - write_gdt_entry, WriteGDTEntry); - para_wrap(pv_cpu_ops.write_idt_entry, vmi_write_idt_entry, - write_idt_entry, WriteIDTEntry); - para_wrap(pv_cpu_ops.load_sp0, vmi_load_sp0, set_kernel_stack, UpdateKernelStack); - para_fill(pv_cpu_ops.set_iopl_mask, SetIOPLMask); - para_fill(pv_cpu_ops.io_delay, IODelay); - - para_wrap(pv_cpu_ops.start_context_switch, vmi_start_context_switch, - set_lazy_mode, SetLazyMode); - para_wrap(pv_cpu_ops.end_context_switch, vmi_end_context_switch, - set_lazy_mode, SetLazyMode); - - para_wrap(pv_mmu_ops.lazy_mode.enter, vmi_enter_lazy_mmu, - set_lazy_mode, SetLazyMode); - para_wrap(pv_mmu_ops.lazy_mode.leave, vmi_leave_lazy_mmu, - set_lazy_mode, SetLazyMode); - - /* user and kernel flush are just handled with different flags to FlushTLB */ - para_wrap(pv_mmu_ops.flush_tlb_user, vmi_flush_tlb_user, _flush_tlb, FlushTLB); - para_wrap(pv_mmu_ops.flush_tlb_kernel, vmi_flush_tlb_kernel, _flush_tlb, FlushTLB); - para_fill(pv_mmu_ops.flush_tlb_single, InvalPage); - - /* - * Until a standard flag format can be agreed on, we need to - * implement these as wrappers in Linux. Get the VMI ROM - * function pointers for the two backend calls. - */ -#ifdef CONFIG_X86_PAE - vmi_ops.set_pte = vmi_get_function(VMI_CALL_SetPxELong); - vmi_ops.update_pte = vmi_get_function(VMI_CALL_UpdatePxELong); -#else - vmi_ops.set_pte = vmi_get_function(VMI_CALL_SetPxE); - vmi_ops.update_pte = vmi_get_function(VMI_CALL_UpdatePxE); -#endif - - if (vmi_ops.set_pte) { - pv_mmu_ops.set_pte = vmi_set_pte; - pv_mmu_ops.set_pte_at = vmi_set_pte_at; - pv_mmu_ops.set_pmd = vmi_set_pmd; -#ifdef CONFIG_X86_PAE - pv_mmu_ops.set_pte_atomic = vmi_set_pte_atomic; - pv_mmu_ops.set_pud = vmi_set_pud; - pv_mmu_ops.pte_clear = vmi_pte_clear; - pv_mmu_ops.pmd_clear = vmi_pmd_clear; -#endif - } - - if (vmi_ops.update_pte) { - pv_mmu_ops.pte_update = vmi_update_pte; - pv_mmu_ops.pte_update_defer = vmi_update_pte_defer; - } - - vmi_ops.allocate_page = vmi_get_function(VMI_CALL_AllocatePage); - if (vmi_ops.allocate_page) { - pv_mmu_ops.alloc_pte = vmi_allocate_pte; - pv_mmu_ops.alloc_pmd = vmi_allocate_pmd; - pv_mmu_ops.alloc_pmd_clone = vmi_allocate_pmd_clone; - } - - vmi_ops.release_page = vmi_get_function(VMI_CALL_ReleasePage); - if (vmi_ops.release_page) { - pv_mmu_ops.release_pte = vmi_release_pte; - pv_mmu_ops.release_pmd = vmi_release_pmd; - pv_mmu_ops.pgd_free = vmi_pgd_free; - } - - /* Set linear is needed in all cases */ - vmi_ops.set_linear_mapping = vmi_get_function(VMI_CALL_SetLinearMapping); - - /* - * These MUST always be patched. Don't support indirect jumps - * through these operations, as the VMI interface may use either - * a jump or a call to get to these operations, depending on - * the backend. They are performance critical anyway, so requiring - * a patch is not a big problem. - */ - pv_cpu_ops.irq_enable_sysexit = (void *)0xfeedbab0; - pv_cpu_ops.iret = (void *)0xbadbab0; - -#ifdef CONFIG_SMP - para_wrap(pv_apic_ops.startup_ipi_hook, vmi_startup_ipi_hook, set_initial_ap_state, SetInitialAPState); -#endif - -#ifdef CONFIG_X86_LOCAL_APIC - para_fill(apic->read, APICRead); - para_fill(apic->write, APICWrite); -#endif - - /* - * Check for VMI timer functionality by probing for a cycle frequency method - */ - reloc = call_vrom_long_func(vmi_rom, get_reloc, VMI_CALL_GetCycleFrequency); - if (!disable_vmi_timer && rel->type != VMI_RELOCATION_NONE) { - vmi_timer_ops.get_cycle_frequency = (void *)rel->eip; - vmi_timer_ops.get_cycle_counter = - vmi_get_function(VMI_CALL_GetCycleCounter); - vmi_timer_ops.get_wallclock = - vmi_get_function(VMI_CALL_GetWallclockTime); - vmi_timer_ops.wallclock_updated = - vmi_get_function(VMI_CALL_WallclockUpdated); - vmi_timer_ops.set_alarm = vmi_get_function(VMI_CALL_SetAlarm); - vmi_timer_ops.cancel_alarm = - vmi_get_function(VMI_CALL_CancelAlarm); - x86_init.timers.timer_init = vmi_time_init; -#ifdef CONFIG_X86_LOCAL_APIC - x86_init.timers.setup_percpu_clockev = vmi_time_bsp_init; - x86_cpuinit.setup_percpu_clockev = vmi_time_ap_init; -#endif - pv_time_ops.sched_clock = vmi_sched_clock; - x86_platform.calibrate_tsc = vmi_tsc_khz; - x86_platform.get_wallclock = vmi_get_wallclock; - x86_platform.set_wallclock = vmi_set_wallclock; - - /* We have true wallclock functions; disable CMOS clock sync */ - no_sync_cmos_clock = 1; - } else { - disable_noidle = 1; - disable_vmi_timer = 1; - } - - para_fill(pv_irq_ops.safe_halt, Halt); - - /* - * Alternative instruction rewriting doesn't happen soon enough - * to convert VMI_IRET to a call instead of a jump; so we have - * to do this before IRQs get reenabled. Fortunately, it is - * idempotent. - */ - apply_paravirt(__parainstructions, __parainstructions_end); - - vmi_bringup(); - - return 1; -} - -#undef para_fill - -void __init vmi_init(void) -{ - if (!vmi_rom) - probe_vmi_rom(); - else - check_vmi_rom(vmi_rom); - - /* In case probing for or validating the ROM failed, basil */ - if (!vmi_rom) - return; - - reserve_top_address(-vmi_rom->virtual_top); - -#ifdef CONFIG_X86_IO_APIC - /* This is virtual hardware; timer routing is wired correctly */ - no_timer_check = 1; -#endif -} - -void __init vmi_activate(void) -{ - unsigned long flags; - - if (!vmi_rom) - return; - - local_irq_save(flags); - activate_vmi(); - local_irq_restore(flags & X86_EFLAGS_IF); -} - -static int __init parse_vmi(char *arg) -{ - if (!arg) - return -EINVAL; - - if (!strcmp(arg, "disable_pge")) { - clear_cpu_cap(&boot_cpu_data, X86_FEATURE_PGE); - disable_pge = 1; - } else if (!strcmp(arg, "disable_pse")) { - clear_cpu_cap(&boot_cpu_data, X86_FEATURE_PSE); - disable_pse = 1; - } else if (!strcmp(arg, "disable_sep")) { - clear_cpu_cap(&boot_cpu_data, X86_FEATURE_SEP); - disable_sep = 1; - } else if (!strcmp(arg, "disable_tsc")) { - clear_cpu_cap(&boot_cpu_data, X86_FEATURE_TSC); - disable_tsc = 1; - } else if (!strcmp(arg, "disable_mtrr")) { - clear_cpu_cap(&boot_cpu_data, X86_FEATURE_MTRR); - disable_mtrr = 1; - } else if (!strcmp(arg, "disable_timer")) { - disable_vmi_timer = 1; - disable_noidle = 1; - } else if (!strcmp(arg, "disable_noidle")) - disable_noidle = 1; - return 0; -} - -early_param("vmi", parse_vmi); |