lguest: per-vcpu lguest pgdir management

this patch makes the pgdir management per-vcpu. The pgdirs pool
is still guest-wide (although it'll probably need to grow when we
are really executing more vcpus), but the pgdidx index is gone,
since it makes no sense anymore. Instead, we use a per-vcpu
index.

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

1 files changed, 4 insertions, 3 deletions

diff --git a/drivers/lguest/x86/core.c b/drivers/lguest/x86/core.c
index 65f2e3809475..8c723555ffb3 100644
--- a/drivers/lguest/x86/core.c
+++ b/drivers/lguest/x86/core.c
@@ -145,7 +145,7 @@ static void run_guest_once(struct lg_cpu *cpu, struct lguest_pages *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[lg->pgdidx].pgdir))
+                     : "0"(pages), "1"(__pa(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. */
@@ -223,7 +223,7 @@ static int emulate_insn(struct lg_cpu *cpu)
         unsigned int insnlen = 0, in = 0, shift = 0;
         /* The eip contains the *virtual* address of the Guest's instruction:
          * guest_pa just subtracts the Guest's page_offset. */
-        unsigned long physaddr = guest_pa(lg, cpu->regs->eip);
+        unsigned long physaddr = guest_pa(cpu, cpu->regs->eip);
 
         /* This must be the Guest kernel trying to do something, not userspace!
          * The bottom two bits of the CS segment register are the privilege
@@ -305,7 +305,8 @@ 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,cpu->arch.last_pagefault,cpu->regs->errcode))
+                if (demand_page(cpu, cpu->arch.last_pagefault,
+                                cpu->regs->errcode))
                         return;
 
                 /* OK, it's really not there (or not OK): the Guest needs to