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authorGlauber de Oliveira Costa <gcosta@redhat.com>2008-01-07 11:05:27 -0200
committerRusty Russell <rusty@rustcorp.com.au>2008-01-30 22:50:08 +1100
commit73044f05a4ac65f2df42753e9566444b9d2a660f (patch)
tree80a3e1d1bda31a769554a8c51f8c189ccec0b9f8 /drivers/lguest/x86
parent7ea07a1500f05e06ebf0136763c781244f77a2a1 (diff)
lguest: make hypercalls use the vcpu struct
this patch changes do_hcall() and do_async_hcall() interfaces (and obviously their callers) to get a vcpu struct. Again, a vcpu services the hypercall, not the whole guest Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'drivers/lguest/x86')
-rw-r--r--drivers/lguest/x86/core.c16
1 files changed, 10 insertions, 6 deletions
diff --git a/drivers/lguest/x86/core.c b/drivers/lguest/x86/core.c
index 3d2131e169f..5962160aff3 100644
--- a/drivers/lguest/x86/core.c
+++ b/drivers/lguest/x86/core.c
@@ -283,8 +283,9 @@ static int emulate_insn(struct lguest *lg)
}
/*H:050 Once we've re-enabled interrupts, we look at why the Guest exited. */
-void lguest_arch_handle_trap(struct lguest *lg)
+void lguest_arch_handle_trap(struct lg_cpu *cpu)
{
+ struct lguest *lg = cpu->lg;
switch (lg->regs->trapnum) {
case 13: /* We've intercepted a General Protection Fault. */
/* Check if this was one of those annoying IN or OUT
@@ -336,7 +337,7 @@ void lguest_arch_handle_trap(struct lguest *lg)
case LGUEST_TRAP_ENTRY:
/* Our 'struct hcall_args' maps directly over our regs: we set
* up the pointer now to indicate a hypercall is pending. */
- lg->hcall = (struct hcall_args *)lg->regs;
+ cpu->hcall = (struct hcall_args *)lg->regs;
return;
}
@@ -491,8 +492,10 @@ 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 lguest *lg, struct hcall_args *args)
+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);
@@ -511,13 +514,14 @@ int lguest_arch_do_hcall(struct lguest *lg, struct hcall_args *args)
}
/*H:126 i386-specific hypercall initialization: */
-int lguest_arch_init_hypercalls(struct lguest *lg)
+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, lg->hcall->arg1, sizeof(*lg->lguest_data)))
+ if (!lguest_address_ok(lg, cpu->hcall->arg1, sizeof(*lg->lguest_data)))
return -EFAULT;
/* Having checked it, we simply set lg->lguest_data to point straight
@@ -525,7 +529,7 @@ int lguest_arch_init_hypercalls(struct lguest *lg)
* 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 + lg->hcall->arg1;
+ lg->lguest_data = 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