lguest: make registers per-vcpu

This is the most obvious per-vcpu field: registers.

So this patch moves it from struct lguest to struct vcpu,
and patch the places in which they are used, accordingly

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

1 files changed, 14 insertions, 14 deletions

diff --git a/drivers/lguest/interrupts_and_traps.c b/drivers/lguest/interrupts_and_traps.c
index 8f59232f458b..468faf8233d6 100644
--- a/drivers/lguest/interrupts_and_traps.c
+++ b/drivers/lguest/interrupts_and_traps.c
@@ -70,7 +70,7 @@ static void set_guest_interrupt(struct lg_cpu *cpu, u32 lo, u32 hi, int has_err)
         /* There are two cases for interrupts: one where the Guest is already
          * in the kernel, and a more complex one where the Guest is in
          * userspace.  We check the privilege level to find out. */
-        if ((lg->regs->ss&0x3) != GUEST_PL) {
+        if ((cpu->regs->ss&0x3) != GUEST_PL) {
                 /* The Guest told us their kernel stack with the SET_STACK
                  * hypercall: both the virtual address and the segment */
                 virtstack = lg->esp1;
@@ -81,12 +81,12 @@ static void set_guest_interrupt(struct lg_cpu *cpu, u32 lo, u32 hi, int has_err)
                  * stack: when the Guest does an "iret" back from the interrupt
                  * handler the CPU will notice they're dropping privilege
                  * levels and expect these here. */
-                push_guest_stack(lg, &gstack, lg->regs->ss);
-                push_guest_stack(lg, &gstack, lg->regs->esp);
+                push_guest_stack(lg, &gstack, cpu->regs->ss);
+                push_guest_stack(lg, &gstack, cpu->regs->esp);
         } else {
                 /* We're staying on the same Guest (kernel) stack. */
-                virtstack = lg->regs->esp;
-                ss = lg->regs->ss;
+                virtstack = cpu->regs->esp;
+                ss = cpu->regs->ss;
 
                 origstack = gstack = guest_pa(lg, virtstack);
         }
@@ -95,7 +95,7 @@ static void set_guest_interrupt(struct lg_cpu *cpu, u32 lo, u32 hi, int has_err)
          * the "Interrupt Flag" bit is always set.  We copy that bit from the
          * Guest's "irq_enabled" field into the eflags word: we saw the Guest
          * copy it back in "lguest_iret". */
-        eflags = lg->regs->eflags;
+        eflags = cpu->regs->eflags;
         if (get_user(irq_enable, &lg->lguest_data->irq_enabled) == 0
             && !(irq_enable & X86_EFLAGS_IF))
                 eflags &= ~X86_EFLAGS_IF;
@@ -104,19 +104,19 @@ static void set_guest_interrupt(struct lg_cpu *cpu, u32 lo, u32 hi, int has_err)
          * "eflags" word, the old code segment, and the old instruction
          * pointer. */
         push_guest_stack(lg, &gstack, eflags);
-        push_guest_stack(lg, &gstack, lg->regs->cs);
-        push_guest_stack(lg, &gstack, lg->regs->eip);
+        push_guest_stack(lg, &gstack, cpu->regs->cs);
+        push_guest_stack(lg, &gstack, cpu->regs->eip);
 
         /* For the six traps which supply an error code, we push that, too. */
         if (has_err)
-                push_guest_stack(lg, &gstack, lg->regs->errcode);
+                push_guest_stack(lg, &gstack, cpu->regs->errcode);
 
         /* Now we've pushed all the old state, we change the stack, the code
          * segment and the address to execute. */
-        lg->regs->ss = ss;
-        lg->regs->esp = virtstack + (gstack - origstack);
-        lg->regs->cs = (__KERNEL_CS|GUEST_PL);
-        lg->regs->eip = idt_address(lo, hi);
+        cpu->regs->ss = ss;
+        cpu->regs->esp = virtstack + (gstack - origstack);
+        cpu->regs->cs = (__KERNEL_CS|GUEST_PL);
+        cpu->regs->eip = idt_address(lo, hi);
 
         /* There are two kinds of interrupt handlers: 0xE is an "interrupt
          * gate" which expects interrupts to be disabled on entry. */
@@ -157,7 +157,7 @@ void maybe_do_interrupt(struct lg_cpu *cpu)
 
         /* They may be in the middle of an iret, where they asked us never to
          * deliver interrupts. */
-        if (lg->regs->eip >= lg->noirq_start && lg->regs->eip < lg->noirq_end)
+        if (cpu->regs->eip >= lg->noirq_start && cpu->regs->eip < lg->noirq_end)
                 return;
 
         /* If they're halted, interrupts restart them. */