diff options
Diffstat (limited to 'drivers/lguest/lguest.c')
| -rw-r--r-- | drivers/lguest/lguest.c | 124 |
1 files changed, 69 insertions, 55 deletions
diff --git a/drivers/lguest/lguest.c b/drivers/lguest/lguest.c index ee1c6d05c3d3..ca9b844f37c2 100644 --- a/drivers/lguest/lguest.c +++ b/drivers/lguest/lguest.c @@ -23,7 +23,7 @@ * * So how does the kernel know it's a Guest? The Guest starts at a special * entry point marked with a magic string, which sets up a few things then - * calls here. We replace the native functions in "struct paravirt_ops" + * calls here. We replace the native functions various "paravirt" structures * with our Guest versions, then boot like normal. :*/ /* @@ -331,7 +331,7 @@ static void lguest_load_tls(struct thread_struct *t, unsigned int cpu) } /*G:038 That's enough excitement for now, back to ploughing through each of - * the paravirt_ops (we're about 1/3 of the way through). + * the different pv_ops structures (we're about 1/3 of the way through). * * This is the Local Descriptor Table, another weird Intel thingy. Linux only * uses this for some strange applications like Wine. We don't do anything @@ -558,7 +558,7 @@ static void lguest_set_pte(pte_t *ptep, pte_t pteval) lazy_hcall(LHCALL_FLUSH_TLB, 1, 0, 0); } -/* Unfortunately for Lguest, the paravirt_ops for page tables were based on +/* Unfortunately for Lguest, the pv_mmu_ops for page tables were based on * native page table operations. On native hardware you can set a new page * table entry whenever you want, but if you want to remove one you have to do * a TLB flush (a TLB is a little cache of page table entries kept by the CPU). @@ -782,7 +782,7 @@ static void lguest_time_init(void) clocksource_register(&lguest_clock); /* Now we've set up our clock, we can use it as the scheduler clock */ - paravirt_ops.sched_clock = lguest_sched_clock; + pv_time_ops.sched_clock = lguest_sched_clock; /* We can't set cpumask in the initializer: damn C limitations! Set it * here and register our timer device. */ @@ -902,7 +902,7 @@ static __init char *lguest_memory_setup(void) /*G:050 * Patching (Powerfully Placating Performance Pedants) * - * We have already seen that "struct paravirt_ops" lets us replace simple + * We have already seen that pv_ops structures let us replace simple * native instructions with calls to the appropriate back end all throughout * the kernel. This allows the same kernel to run as a Guest and as a native * kernel, but it's slow because of all the indirect branches. @@ -927,10 +927,10 @@ static const struct lguest_insns { const char *start, *end; } lguest_insns[] = { - [PARAVIRT_PATCH(irq_disable)] = { lgstart_cli, lgend_cli }, - [PARAVIRT_PATCH(irq_enable)] = { lgstart_sti, lgend_sti }, - [PARAVIRT_PATCH(restore_fl)] = { lgstart_popf, lgend_popf }, - [PARAVIRT_PATCH(save_fl)] = { lgstart_pushf, lgend_pushf }, + [PARAVIRT_PATCH(pv_irq_ops.irq_disable)] = { lgstart_cli, lgend_cli }, + [PARAVIRT_PATCH(pv_irq_ops.irq_enable)] = { lgstart_sti, lgend_sti }, + [PARAVIRT_PATCH(pv_irq_ops.restore_fl)] = { lgstart_popf, lgend_popf }, + [PARAVIRT_PATCH(pv_irq_ops.save_fl)] = { lgstart_pushf, lgend_pushf }, }; /* Now our patch routine is fairly simple (based on the native one in @@ -957,9 +957,9 @@ static unsigned lguest_patch(u8 type, u16 clobber, void *ibuf, return insn_len; } -/*G:030 Once we get to lguest_init(), we know we're a Guest. The paravirt_ops - * structure in the kernel provides a single point for (almost) every routine - * we have to override to avoid privileged instructions. */ +/*G:030 Once we get to lguest_init(), we know we're a Guest. The pv_ops + * structures in the kernel provide points for (almost) every routine we have + * to override to avoid privileged instructions. */ __init void lguest_init(void *boot) { /* Copy boot parameters first: the Launcher put the physical location @@ -974,54 +974,68 @@ __init void lguest_init(void *boot) /* We're under lguest, paravirt is enabled, and we're running at * privilege level 1, not 0 as normal. */ - paravirt_ops.name = "lguest"; - paravirt_ops.paravirt_enabled = 1; - paravirt_ops.kernel_rpl = 1; + pv_info.name = "lguest"; + pv_info.paravirt_enabled = 1; + pv_info.kernel_rpl = 1; /* We set up all the lguest overrides for sensitive operations. These * are detailed with the operations themselves. */ - paravirt_ops.save_fl = save_fl; - paravirt_ops.restore_fl = restore_fl; - paravirt_ops.irq_disable = irq_disable; - paravirt_ops.irq_enable = irq_enable; - paravirt_ops.load_gdt = lguest_load_gdt; - paravirt_ops.memory_setup = lguest_memory_setup; - paravirt_ops.cpuid = lguest_cpuid; - paravirt_ops.write_cr3 = lguest_write_cr3; - paravirt_ops.flush_tlb_user = lguest_flush_tlb_user; - paravirt_ops.flush_tlb_single = lguest_flush_tlb_single; - paravirt_ops.flush_tlb_kernel = lguest_flush_tlb_kernel; - paravirt_ops.set_pte = lguest_set_pte; - paravirt_ops.set_pte_at = lguest_set_pte_at; - paravirt_ops.set_pmd = lguest_set_pmd; + + /* interrupt-related operations */ + pv_irq_ops.init_IRQ = lguest_init_IRQ; + pv_irq_ops.save_fl = save_fl; + pv_irq_ops.restore_fl = restore_fl; + pv_irq_ops.irq_disable = irq_disable; + pv_irq_ops.irq_enable = irq_enable; + pv_irq_ops.safe_halt = lguest_safe_halt; + + /* init-time operations */ + pv_init_ops.memory_setup = lguest_memory_setup; + pv_init_ops.patch = lguest_patch; + + /* Intercepts of various cpu instructions */ + pv_cpu_ops.load_gdt = lguest_load_gdt; + pv_cpu_ops.cpuid = lguest_cpuid; + pv_cpu_ops.load_idt = lguest_load_idt; + pv_cpu_ops.iret = lguest_iret; + pv_cpu_ops.load_esp0 = lguest_load_esp0; + pv_cpu_ops.load_tr_desc = lguest_load_tr_desc; + pv_cpu_ops.set_ldt = lguest_set_ldt; + pv_cpu_ops.load_tls = lguest_load_tls; + pv_cpu_ops.set_debugreg = lguest_set_debugreg; + pv_cpu_ops.clts = lguest_clts; + pv_cpu_ops.read_cr0 = lguest_read_cr0; + pv_cpu_ops.write_cr0 = lguest_write_cr0; + pv_cpu_ops.read_cr4 = lguest_read_cr4; + pv_cpu_ops.write_cr4 = lguest_write_cr4; + pv_cpu_ops.write_gdt_entry = lguest_write_gdt_entry; + pv_cpu_ops.write_idt_entry = lguest_write_idt_entry; + pv_cpu_ops.wbinvd = lguest_wbinvd; + + /* pagetable management */ + pv_mmu_ops.write_cr3 = lguest_write_cr3; + pv_mmu_ops.flush_tlb_user = lguest_flush_tlb_user; + pv_mmu_ops.flush_tlb_single = lguest_flush_tlb_single; + pv_mmu_ops.flush_tlb_kernel = lguest_flush_tlb_kernel; + pv_mmu_ops.set_pte = lguest_set_pte; + pv_mmu_ops.set_pte_at = lguest_set_pte_at; + pv_mmu_ops.set_pmd = lguest_set_pmd; + pv_mmu_ops.read_cr2 = lguest_read_cr2; + pv_mmu_ops.read_cr3 = lguest_read_cr3; + #ifdef CONFIG_X86_LOCAL_APIC - paravirt_ops.apic_write = lguest_apic_write; - paravirt_ops.apic_write_atomic = lguest_apic_write; - paravirt_ops.apic_read = lguest_apic_read; + /* apic read/write intercepts */ + pv_apic_ops.apic_write = lguest_apic_write; + pv_apic_ops.apic_write_atomic = lguest_apic_write; + pv_apic_ops.apic_read = lguest_apic_read; #endif - paravirt_ops.load_idt = lguest_load_idt; - paravirt_ops.iret = lguest_iret; - paravirt_ops.load_esp0 = lguest_load_esp0; - paravirt_ops.load_tr_desc = lguest_load_tr_desc; - paravirt_ops.set_ldt = lguest_set_ldt; - paravirt_ops.load_tls = lguest_load_tls; - paravirt_ops.set_debugreg = lguest_set_debugreg; - paravirt_ops.clts = lguest_clts; - paravirt_ops.read_cr0 = lguest_read_cr0; - paravirt_ops.write_cr0 = lguest_write_cr0; - paravirt_ops.init_IRQ = lguest_init_IRQ; - paravirt_ops.read_cr2 = lguest_read_cr2; - paravirt_ops.read_cr3 = lguest_read_cr3; - paravirt_ops.read_cr4 = lguest_read_cr4; - paravirt_ops.write_cr4 = lguest_write_cr4; - paravirt_ops.write_gdt_entry = lguest_write_gdt_entry; - paravirt_ops.write_idt_entry = lguest_write_idt_entry; - paravirt_ops.patch = lguest_patch; - paravirt_ops.safe_halt = lguest_safe_halt; - paravirt_ops.get_wallclock = lguest_get_wallclock; - paravirt_ops.time_init = lguest_time_init; - paravirt_ops.set_lazy_mode = lguest_lazy_mode; - paravirt_ops.wbinvd = lguest_wbinvd; + + /* time operations */ + pv_time_ops.get_wallclock = lguest_get_wallclock; + pv_time_ops.time_init = lguest_time_init; + + pv_misc_ops.set_lazy_mode = lguest_lazy_mode; + /* Now is a good time to look at the implementations of these functions * before returning to the rest of lguest_init(). */ |