paravirt: refactor struct paravirt_ops into smaller pv_*_ops
This patch refactors the paravirt_ops structure into groups of
functionally related ops:
pv_info - random info, rather than function entrypoints
pv_init_ops - functions used at boot time (some for module_init too)
pv_misc_ops - lazy mode, which didn't fit well anywhere else
pv_time_ops - time-related functions
pv_cpu_ops - various privileged instruction ops
pv_irq_ops - operations for managing interrupt state
pv_apic_ops - APIC operations
pv_mmu_ops - operations for managing pagetables
There are several motivations for this:
1. Some of these ops will be general to all x86, and some will be
i386/x86-64 specific. This makes it easier to share common stuff
while allowing separate implementations where needed.
2. At the moment we must export all of paravirt_ops, but modules only
need selected parts of it. This allows us to export on a case by case
basis (and also choose which export license we want to apply).
3. Functional groupings make things a bit more readable.
Struct paravirt_ops is now only used as a template to generate
patch-site identifiers, and to extract function pointers for inserting
into jmp/calls when patching. It is only instantiated when needed.
Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: Andi Kleen <ak@suse.de>
Cc: Zach Amsden <zach@vmware.com>
Cc: Avi Kivity <avi@qumranet.com>
Cc: Anthony Liguory <aliguori@us.ibm.com>
Cc: "Glauber de Oliveira Costa" <glommer@gmail.com>
Cc: Jun Nakajima <jun.nakajima@intel.com>
diff --git a/arch/x86/kernel/vmi_32.c b/arch/x86/kernel/vmi_32.c
index 18673e0..67cea5c 100644
--- a/arch/x86/kernel/vmi_32.c
+++ b/arch/x86/kernel/vmi_32.c
@@ -134,21 +134,21 @@
unsigned long eip, unsigned len)
{
switch (type) {
- case PARAVIRT_PATCH(irq_disable):
+ case PARAVIRT_PATCH(pv_irq_ops.irq_disable):
return patch_internal(VMI_CALL_DisableInterrupts, len,
insns, eip);
- case PARAVIRT_PATCH(irq_enable):
+ case PARAVIRT_PATCH(pv_irq_ops.irq_enable):
return patch_internal(VMI_CALL_EnableInterrupts, len,
insns, eip);
- case PARAVIRT_PATCH(restore_fl):
+ case PARAVIRT_PATCH(pv_irq_ops.restore_fl):
return patch_internal(VMI_CALL_SetInterruptMask, len,
insns, eip);
- case PARAVIRT_PATCH(save_fl):
+ case PARAVIRT_PATCH(pv_irq_ops.save_fl):
return patch_internal(VMI_CALL_GetInterruptMask, len,
insns, eip);
- case PARAVIRT_PATCH(iret):
+ case PARAVIRT_PATCH(pv_cpu_ops.iret):
return patch_internal(VMI_CALL_IRET, len, insns, eip);
- case PARAVIRT_PATCH(irq_enable_sysexit):
+ case PARAVIRT_PATCH(pv_cpu_ops.irq_enable_sysexit):
return patch_internal(VMI_CALL_SYSEXIT, len, insns, eip);
default:
break;
@@ -690,9 +690,9 @@
reloc = call_vrom_long_func(vmi_rom, get_reloc, \
VMI_CALL_##vmicall); \
if (rel->type == VMI_RELOCATION_CALL_REL) \
- paravirt_ops.opname = (void *)rel->eip; \
+ opname = (void *)rel->eip; \
else if (rel->type == VMI_RELOCATION_NOP) \
- paravirt_ops.opname = (void *)vmi_nop; \
+ opname = (void *)vmi_nop; \
else if (rel->type != VMI_RELOCATION_NONE) \
printk(KERN_WARNING "VMI: Unknown relocation " \
"type %d for " #vmicall"\n",\
@@ -712,7 +712,7 @@
VMI_CALL_##vmicall); \
BUG_ON(rel->type == VMI_RELOCATION_JUMP_REL); \
if (rel->type == VMI_RELOCATION_CALL_REL) { \
- paravirt_ops.opname = wrapper; \
+ opname = wrapper; \
vmi_ops.cache = (void *)rel->eip; \
} \
} while (0)
@@ -732,11 +732,11 @@
}
savesegment(cs, kernel_cs);
- paravirt_ops.paravirt_enabled = 1;
- paravirt_ops.kernel_rpl = kernel_cs & SEGMENT_RPL_MASK;
+ pv_info.paravirt_enabled = 1;
+ pv_info.kernel_rpl = kernel_cs & SEGMENT_RPL_MASK;
+ pv_info.name = "vmi";
- paravirt_ops.patch = vmi_patch;
- paravirt_ops.name = "vmi";
+ pv_init_ops.patch = vmi_patch;
/*
* Many of these operations are ABI compatible with VMI.
@@ -754,26 +754,26 @@
*/
/* CPUID is special, so very special it gets wrapped like a present */
- para_wrap(cpuid, vmi_cpuid, cpuid, CPUID);
+ para_wrap(pv_cpu_ops.cpuid, vmi_cpuid, cpuid, CPUID);
- para_fill(clts, CLTS);
- para_fill(get_debugreg, GetDR);
- para_fill(set_debugreg, SetDR);
- para_fill(read_cr0, GetCR0);
- para_fill(read_cr2, GetCR2);
- para_fill(read_cr3, GetCR3);
- para_fill(read_cr4, GetCR4);
- para_fill(write_cr0, SetCR0);
- para_fill(write_cr2, SetCR2);
- para_fill(write_cr3, SetCR3);
- para_fill(write_cr4, SetCR4);
- para_fill(save_fl, GetInterruptMask);
- para_fill(restore_fl, SetInterruptMask);
- para_fill(irq_disable, DisableInterrupts);
- para_fill(irq_enable, EnableInterrupts);
+ 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, GetInterruptMask);
+ para_fill(pv_irq_ops.restore_fl, SetInterruptMask);
+ para_fill(pv_irq_ops.irq_disable, DisableInterrupts);
+ para_fill(pv_irq_ops.irq_enable, EnableInterrupts);
- para_fill(wbinvd, WBINVD);
- para_fill(read_tsc, RDTSC);
+ 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 */
@@ -781,29 +781,29 @@
/* paravirt_ops.rdpmc = vmi_rdpmc */
/* TR interface doesn't pass TR value, wrap */
- para_wrap(load_tr_desc, vmi_set_tr, set_tr, SetTR);
+ para_wrap(pv_cpu_ops.load_tr_desc, vmi_set_tr, set_tr, SetTR);
/* LDT is special, too */
- para_wrap(set_ldt, vmi_set_ldt, _set_ldt, SetLDT);
+ para_wrap(pv_cpu_ops.set_ldt, vmi_set_ldt, _set_ldt, SetLDT);
- para_fill(load_gdt, SetGDT);
- para_fill(load_idt, SetIDT);
- para_fill(store_gdt, GetGDT);
- para_fill(store_idt, GetIDT);
- para_fill(store_tr, GetTR);
- paravirt_ops.load_tls = vmi_load_tls;
- para_fill(write_ldt_entry, WriteLDTEntry);
- para_fill(write_gdt_entry, WriteGDTEntry);
- para_fill(write_idt_entry, WriteIDTEntry);
- para_wrap(load_esp0, vmi_load_esp0, set_kernel_stack, UpdateKernelStack);
- para_fill(set_iopl_mask, SetIOPLMask);
- para_fill(io_delay, IODelay);
- para_wrap(set_lazy_mode, vmi_set_lazy_mode, set_lazy_mode, SetLazyMode);
+ 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_fill(pv_cpu_ops.write_ldt_entry, WriteLDTEntry);
+ para_fill(pv_cpu_ops.write_gdt_entry, WriteGDTEntry);
+ para_fill(pv_cpu_ops.write_idt_entry, WriteIDTEntry);
+ para_wrap(pv_cpu_ops.load_esp0, vmi_load_esp0, set_kernel_stack, UpdateKernelStack);
+ para_fill(pv_cpu_ops.set_iopl_mask, SetIOPLMask);
+ para_fill(pv_cpu_ops.io_delay, IODelay);
+ para_wrap(pv_misc_ops.set_lazy_mode, vmi_set_lazy_mode, set_lazy_mode, SetLazyMode);
/* user and kernel flush are just handled with different flags to FlushTLB */
- para_wrap(flush_tlb_user, vmi_flush_tlb_user, _flush_tlb, FlushTLB);
- para_wrap(flush_tlb_kernel, vmi_flush_tlb_kernel, _flush_tlb, FlushTLB);
- para_fill(flush_tlb_single, InvalPage);
+ 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
@@ -819,41 +819,41 @@
#endif
if (vmi_ops.set_pte) {
- paravirt_ops.set_pte = vmi_set_pte;
- paravirt_ops.set_pte_at = vmi_set_pte_at;
- paravirt_ops.set_pmd = vmi_set_pmd;
+ 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
- paravirt_ops.set_pte_atomic = vmi_set_pte_atomic;
- paravirt_ops.set_pte_present = vmi_set_pte_present;
- paravirt_ops.set_pud = vmi_set_pud;
- paravirt_ops.pte_clear = vmi_pte_clear;
- paravirt_ops.pmd_clear = vmi_pmd_clear;
+ pv_mmu_ops.set_pte_atomic = vmi_set_pte_atomic;
+ pv_mmu_ops.set_pte_present = vmi_set_pte_present;
+ 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) {
- paravirt_ops.pte_update = vmi_update_pte;
- paravirt_ops.pte_update_defer = vmi_update_pte_defer;
+ 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) {
- paravirt_ops.alloc_pt = vmi_allocate_pt;
- paravirt_ops.alloc_pd = vmi_allocate_pd;
- paravirt_ops.alloc_pd_clone = vmi_allocate_pd_clone;
+ pv_mmu_ops.alloc_pt = vmi_allocate_pt;
+ pv_mmu_ops.alloc_pd = vmi_allocate_pd;
+ pv_mmu_ops.alloc_pd_clone = vmi_allocate_pd_clone;
}
vmi_ops.release_page = vmi_get_function(VMI_CALL_ReleasePage);
if (vmi_ops.release_page) {
- paravirt_ops.release_pt = vmi_release_pt;
- paravirt_ops.release_pd = vmi_release_pd;
+ pv_mmu_ops.release_pt = vmi_release_pt;
+ pv_mmu_ops.release_pd = vmi_release_pd;
}
/* Set linear is needed in all cases */
vmi_ops.set_linear_mapping = vmi_get_function(VMI_CALL_SetLinearMapping);
#ifdef CONFIG_HIGHPTE
if (vmi_ops.set_linear_mapping)
- paravirt_ops.kmap_atomic_pte = vmi_kmap_atomic_pte;
+ pv_mmu_ops.kmap_atomic_pte = vmi_kmap_atomic_pte;
#endif
/*
@@ -863,17 +863,17 @@
* the backend. They are performance critical anyway, so requiring
* a patch is not a big problem.
*/
- paravirt_ops.irq_enable_sysexit = (void *)0xfeedbab0;
- paravirt_ops.iret = (void *)0xbadbab0;
+ pv_cpu_ops.irq_enable_sysexit = (void *)0xfeedbab0;
+ pv_cpu_ops.iret = (void *)0xbadbab0;
#ifdef CONFIG_SMP
- para_wrap(startup_ipi_hook, vmi_startup_ipi_hook, set_initial_ap_state, SetInitialAPState);
+ 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);
- para_fill(apic_write_atomic, APICWrite);
+ para_fill(pv_apic_ops.apic_read, APICRead);
+ para_fill(pv_apic_ops.apic_write, APICWrite);
+ para_fill(pv_apic_ops.apic_write_atomic, APICWrite);
#endif
/*
@@ -891,15 +891,15 @@
vmi_timer_ops.set_alarm = vmi_get_function(VMI_CALL_SetAlarm);
vmi_timer_ops.cancel_alarm =
vmi_get_function(VMI_CALL_CancelAlarm);
- paravirt_ops.time_init = vmi_time_init;
- paravirt_ops.get_wallclock = vmi_get_wallclock;
- paravirt_ops.set_wallclock = vmi_set_wallclock;
+ pv_time_ops.time_init = vmi_time_init;
+ pv_time_ops.get_wallclock = vmi_get_wallclock;
+ pv_time_ops.set_wallclock = vmi_set_wallclock;
#ifdef CONFIG_X86_LOCAL_APIC
- paravirt_ops.setup_boot_clock = vmi_time_bsp_init;
- paravirt_ops.setup_secondary_clock = vmi_time_ap_init;
+ pv_apic_ops.setup_boot_clock = vmi_time_bsp_init;
+ pv_apic_ops.setup_secondary_clock = vmi_time_ap_init;
#endif
- paravirt_ops.sched_clock = vmi_sched_clock;
- paravirt_ops.get_cpu_khz = vmi_cpu_khz;
+ pv_time_ops.sched_clock = vmi_sched_clock;
+ pv_time_ops.get_cpu_khz = vmi_cpu_khz;
/* We have true wallclock functions; disable CMOS clock sync */
no_sync_cmos_clock = 1;
@@ -908,7 +908,7 @@
disable_vmi_timer = 1;
}
- para_fill(safe_halt, Halt);
+ para_fill(pv_irq_ops.safe_halt, Halt);
/*
* Alternative instruction rewriting doesn't happen soon enough