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lguest: replace lguest_arch with lg_cpu_arch.

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The fields found in lguest_arch are not really per-guest,
but per-cpu (gdt, idt, etc). So this patch turns lguest_arch
into lg_cpu_arch.

It makes sense to have a per-guest per-arch struct, but this
can be addressed later, when the need arrives.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Glauber de Oliveira Costa
2008-01-07 11:05:33 -02:00
committed by Rusty Russell
parent a53a35a8b4
commit fc708b3e40
5 changed files with 58 additions and 57 deletions
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24
drivers/lguest/x86/core.c
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@@ -100,14 +100,14 @@ static void copy_in_guest_info(struct lg_cpu *cpu, struct lguest_pages *pages)
/* Copy direct-to-Guest trap entries. */
if (lg->changed & CHANGED_IDT)
copy_traps(lg, pages->state.guest_idt, default_idt_entries);
copy_traps(cpu, pages->state.guest_idt, default_idt_entries);
/* Copy all GDT entries which the Guest can change. */
if (lg->changed & CHANGED_GDT)
copy_gdt(lg, pages->state.guest_gdt);
copy_gdt(cpu, pages->state.guest_gdt);
/* If only the TLS entries have changed, copy them. */
else if (lg->changed & CHANGED_GDT_TLS)
copy_gdt_tls(lg, pages->state.guest_gdt);
copy_gdt_tls(cpu, pages->state.guest_gdt);
/* Mark the Guest as unchanged for next time. */
lg->changed = 0;
@@ -196,7 +196,7 @@ void lguest_arch_run_guest(struct lg_cpu *cpu)
* re-enable interrupts an interrupt could fault and thus overwrite
* cr2, or we could even move off to a different CPU. */
if (cpu->regs->trapnum == 14)
lg->arch.last_pagefault = read_cr2();
cpu->arch.last_pagefault = read_cr2();
/* Similarly, if we took a trap because the Guest used the FPU,
* we have to restore the FPU it expects to see. */
else if (cpu->regs->trapnum == 7)
@@ -307,7 +307,7 @@ void lguest_arch_handle_trap(struct lg_cpu *cpu)
*
* The errcode tells whether this was a read or a write, and
* whether kernel or userspace code. */
if (demand_page(lg, lg->arch.last_pagefault, cpu->regs->errcode))
if (demand_page(lg,cpu->arch.last_pagefault,cpu->regs->errcode))
return;
/* OK, it's really not there (or not OK): the Guest needs to
@@ -318,7 +318,7 @@ void lguest_arch_handle_trap(struct lg_cpu *cpu)
* happen before it's done the LHCALL_LGUEST_INIT hypercall, so
* lg->lguest_data could be NULL */
if (lg->lguest_data &&
put_user(lg->arch.last_pagefault, &lg->lguest_data->cr2))
put_user(cpu->arch.last_pagefault, &lg->lguest_data->cr2))
kill_guest(lg, "Writing cr2");
break;
case 7: /* We've intercepted a Device Not Available fault. */
@@ -349,7 +349,7 @@ void lguest_arch_handle_trap(struct lg_cpu *cpu)
* it handle), it dies with a cryptic error message. */
kill_guest(lg, "unhandled trap %li at %#lx (%#lx)",
cpu->regs->trapnum, cpu->regs->eip,
cpu->regs->trapnum == 14 ? lg->arch.last_pagefault
cpu->regs->trapnum == 14 ? cpu->arch.last_pagefault
: cpu->regs->errcode);
}
@@ -495,17 +495,15 @@ void __exit lguest_arch_host_fini(void)
/*H:122 The i386-specific hypercalls simply farm out to the right functions. */
int lguest_arch_do_hcall(struct lg_cpu *cpu, struct hcall_args *args)
{
struct lguest *lg = cpu->lg;
switch (args->arg0) {
case LHCALL_LOAD_GDT:
load_guest_gdt(lg, args->arg1, args->arg2);
load_guest_gdt(cpu, args->arg1, args->arg2);
break;
case LHCALL_LOAD_IDT_ENTRY:
load_guest_idt_entry(lg, args->arg1, args->arg2, args->arg3);
load_guest_idt_entry(cpu, args->arg1, args->arg2, args->arg3);
break;
case LHCALL_LOAD_TLS:
guest_load_tls(lg, args->arg1);
guest_load_tls(cpu, args->arg1);
break;
default:
/* Bad Guest. Bad! */
@@ -586,5 +584,5 @@ void lguest_arch_setup_regs(struct lg_cpu *cpu, unsigned long start)
/* There are a couple of GDT entries the Guest expects when first
* booting. */
setup_guest_gdt(cpu->lg);
setup_guest_gdt(cpu);
}