*/
static void copy_in_guest_info(struct lg_cpu *cpu, struct lguest_pages *pages)
{
- struct lguest *lg = cpu->lg;
/* Copying all this data can be quite expensive. We usually run the
* same Guest we ran last time (and that Guest hasn't run anywhere else
* meanwhile). If that's not the case, we pretend everything in the
if (__get_cpu_var(last_cpu) != cpu || cpu->last_pages != pages) {
__get_cpu_var(last_cpu) = cpu;
cpu->last_pages = pages;
- lg->changed = CHANGED_ALL;
+ cpu->changed = CHANGED_ALL;
}
/* These copies are pretty cheap, so we do them unconditionally: */
/* Set up the two "TSS" members which tell the CPU what stack to use
* for traps which do directly into the Guest (ie. traps at privilege
* level 1). */
- pages->state.guest_tss.esp1 = cpu->esp1;
+ pages->state.guest_tss.sp1 = cpu->esp1;
pages->state.guest_tss.ss1 = cpu->ss1;
/* Copy direct-to-Guest trap entries. */
- if (lg->changed & CHANGED_IDT)
+ if (cpu->changed & CHANGED_IDT)
copy_traps(cpu, pages->state.guest_idt, default_idt_entries);
/* Copy all GDT entries which the Guest can change. */
- if (lg->changed & CHANGED_GDT)
+ if (cpu->changed & CHANGED_GDT)
copy_gdt(cpu, pages->state.guest_gdt);
/* If only the TLS entries have changed, copy them. */
- else if (lg->changed & CHANGED_GDT_TLS)
+ else if (cpu->changed & CHANGED_GDT_TLS)
copy_gdt_tls(cpu, pages->state.guest_gdt);
/* Mark the Guest as unchanged for next time. */
- lg->changed = 0;
+ cpu->changed = 0;
}
/* Finally: the code to actually call into the Switcher to run the Guest. */
{
/* This is a dummy value we need for GCC's sake. */
unsigned int clobber;
- struct lguest *lg = cpu->lg;
/* Copy the guest-specific information into this CPU's "struct
* lguest_pages". */
* 0-th argument above, ie "a"). %ebx contains the
* physical address of the Guest's top-level page
* directory. */
- : "0"(pages), "1"(__pa(lg->pgdirs[cpu->cpu_pgd].pgdir))
+ : "0"(pages), "1"(__pa(cpu->lg->pgdirs[cpu->cpu_pgd].pgdir))
/* We tell gcc that all these registers could change,
* which means we don't have to save and restore them in
* the Switcher. */
* instructions and skip over it. We return true if we did. */
static int emulate_insn(struct lg_cpu *cpu)
{
- struct lguest *lg = cpu->lg;
u8 insn;
unsigned int insnlen = 0, in = 0, shift = 0;
/* The eip contains the *virtual* address of the Guest's instruction:
return 0;
/* Decoding x86 instructions is icky. */
- insn = lgread(lg, physaddr, u8);
+ insn = lgread(cpu, physaddr, u8);
/* 0x66 is an "operand prefix". It means it's using the upper 16 bits
of the eax register. */
shift = 16;
/* The instruction is 1 byte so far, read the next byte. */
insnlen = 1;
- insn = lgread(lg, physaddr + insnlen, u8);
+ insn = lgread(cpu, physaddr + insnlen, u8);
}
/* We can ignore the lower bit for the moment and decode the 4 opcodes
/*H:050 Once we've re-enabled interrupts, we look at why the Guest exited. */
void lguest_arch_handle_trap(struct lg_cpu *cpu)
{
- struct lguest *lg = cpu->lg;
switch (cpu->regs->trapnum) {
case 13: /* We've intercepted a General Protection Fault. */
/* Check if this was one of those annoying IN or OUT
* Note that if the Guest were really messed up, this could
* happen before it's done the LHCALL_LGUEST_INIT hypercall, so
* lg->lguest_data could be NULL */
- if (lg->lguest_data &&
- put_user(cpu->arch.last_pagefault, &lg->lguest_data->cr2))
- kill_guest(lg, "Writing cr2");
+ if (cpu->lg->lguest_data &&
+ put_user(cpu->arch.last_pagefault,
+ &cpu->lg->lguest_data->cr2))
+ kill_guest(cpu, "Writing cr2");
break;
case 7: /* We've intercepted a Device Not Available fault. */
/* If the Guest doesn't want to know, we already restored the
/* If the Guest doesn't have a handler (either it hasn't
* registered any yet, or it's one of the faults we don't let
* it handle), it dies with a cryptic error message. */
- kill_guest(lg, "unhandled trap %li at %#lx (%#lx)",
+ kill_guest(cpu, "unhandled trap %li at %#lx (%#lx)",
cpu->regs->trapnum, cpu->regs->eip,
cpu->regs->trapnum == 14 ? cpu->arch.last_pagefault
: cpu->regs->errcode);
/* We know where we want the stack to be when the Guest enters
* the switcher: in pages->regs. The stack grows upwards, so
* we start it at the end of that structure. */
- state->guest_tss.esp0 = (long)(&pages->regs + 1);
+ state->guest_tss.sp0 = (long)(&pages->regs + 1);
/* And this is the GDT entry to use for the stack: we keep a
* couple of special LGUEST entries. */
state->guest_tss.ss0 = LGUEST_DS;
int lguest_arch_init_hypercalls(struct lg_cpu *cpu)
{
u32 tsc_speed;
- struct lguest *lg = cpu->lg;
/* The pointer to the Guest's "struct lguest_data" is the only
* argument. We check that address now. */
- if (!lguest_address_ok(lg, cpu->hcall->arg1, sizeof(*lg->lguest_data)))
+ if (!lguest_address_ok(cpu->lg, cpu->hcall->arg1,
+ sizeof(*cpu->lg->lguest_data)))
return -EFAULT;
/* Having checked it, we simply set lg->lguest_data to point straight
* copy_to_user/from_user from now on, instead of lgread/write. I put
* this in to show that I'm not immune to writing stupid
* optimizations. */
- lg->lguest_data = lg->mem_base + cpu->hcall->arg1;
+ cpu->lg->lguest_data = cpu->lg->mem_base + cpu->hcall->arg1;
/* We insist that the Time Stamp Counter exist and doesn't change with
* cpu frequency. Some devious chip manufacturers decided that TSC
tsc_speed = tsc_khz;
else
tsc_speed = 0;
- if (put_user(tsc_speed, &lg->lguest_data->tsc_khz))
+ if (put_user(tsc_speed, &cpu->lg->lguest_data->tsc_khz))
return -EFAULT;
/* The interrupt code might not like the system call vector. */
- if (!check_syscall_vector(lg))
- kill_guest(lg, "bad syscall vector");
+ if (!check_syscall_vector(cpu->lg))
+ kill_guest(cpu, "bad syscall vector");
return 0;
}