Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus

* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus: (27 commits)
  lguest: use __PAGE_KERNEL instead of _PAGE_KERNEL
  lguest: Use explicit includes rateher than indirect
  lguest: get rid of lg variable assignments
  lguest: change gpte_addr header
  lguest: move changed bitmap to lg_cpu
  lguest: move last_pages to lg_cpu
  lguest: change last_guest to last_cpu
  lguest: change spte_addr header
  lguest: per-vcpu lguest pgdir management
  lguest: make pending notifications per-vcpu
  lguest: makes special fields be per-vcpu
  lguest: per-vcpu lguest task management
  lguest: replace lguest_arch with lg_cpu_arch.
  lguest: make registers per-vcpu
  lguest: make emulate_insn receive a vcpu struct.
  lguest: map_switcher_in_guest() per-vcpu
  lguest: per-vcpu interrupt processing.
  lguest: per-vcpu lguest timers
  lguest: make hypercalls use the vcpu struct
  lguest: make write() operation smp aware
  ...

Manual conflict resolved (maybe even correctly, who knows) in
drivers/lguest/x86/core.c

1 files changed, 65 insertions, 62 deletions

diff --git a/drivers/lguest/x86/core.c b/drivers/lguest/x86/core.c
index 44adb00e1490..61f2f8eb8cad 100644
--- a/drivers/lguest/x86/core.c
+++ b/drivers/lguest/x86/core.c
@@ -60,7 +60,7 @@ static struct lguest_pages *lguest_pages(unsigned int cpu)
                   (SWITCHER_ADDR + SHARED_SWITCHER_PAGES*PAGE_SIZE))[cpu]);
 }
 
-static DEFINE_PER_CPU(struct lguest *, last_guest);
+static DEFINE_PER_CPU(struct lg_cpu *, last_cpu);
 
 /*S:010
  * We approach the Switcher.
@@ -73,16 +73,16 @@ static DEFINE_PER_CPU(struct lguest *, last_guest);
  * since it last ran.  We saw this set in interrupts_and_traps.c and
  * segments.c.
  */
-static void copy_in_guest_info(struct lguest *lg, struct lguest_pages *pages)
+static void copy_in_guest_info(struct lg_cpu *cpu, struct lguest_pages *pages)
 {
         /* 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
          * Guest has changed. */
-        if (__get_cpu_var(last_guest) != lg || lg->last_pages != pages) {
-                __get_cpu_var(last_guest) = lg;
-                lg->last_pages = pages;
-                lg->changed = CHANGED_ALL;
+        if (__get_cpu_var(last_cpu) != cpu || cpu->last_pages != pages) {
+                __get_cpu_var(last_cpu) = cpu;
+                cpu->last_pages = pages;
+                cpu->changed = CHANGED_ALL;
         }
 
         /* These copies are pretty cheap, so we do them unconditionally: */
@@ -90,42 +90,42 @@ static void copy_in_guest_info(struct lguest *lg, struct lguest_pages *pages)
         pages->state.host_cr3 = __pa(current->mm->pgd);
         /* Set up the Guest's page tables to see this CPU's pages (and no
          * other CPU's pages). */
-        map_switcher_in_guest(lg, pages);
+        map_switcher_in_guest(cpu, pages);
         /* 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.sp1 = lg->esp1;
-        pages->state.guest_tss.ss1 = lg->ss1;
+        pages->state.guest_tss.esp1 = cpu->esp1;
+        pages->state.guest_tss.ss1 = cpu->ss1;
 
         /* Copy direct-to-Guest trap entries. */
-        if (lg->changed & CHANGED_IDT)
-                copy_traps(lg, pages->state.guest_idt, default_idt_entries);
+        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)
-                copy_gdt(lg, pages->state.guest_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)
-                copy_gdt_tls(lg, pages->state.guest_gdt);
+        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. */
-static void run_guest_once(struct lguest *lg, struct lguest_pages *pages)
+static void run_guest_once(struct lg_cpu *cpu, struct lguest_pages *pages)
 {
         /* This is a dummy value we need for GCC's sake. */
         unsigned int clobber;
 
         /* Copy the guest-specific information into this CPU's "struct
          * lguest_pages". */
-        copy_in_guest_info(lg, pages);
+        copy_in_guest_info(cpu, pages);
 
         /* Set the trap number to 256 (impossible value).  If we fault while
          * switching to the Guest (bad segment registers or bug), this will
          * cause us to abort the Guest. */
-        lg->regs->trapnum = 256;
+        cpu->regs->trapnum = 256;
 
         /* Now: we push the "eflags" register on the stack, then do an "lcall".
          * This is how we change from using the kernel code segment to using
@@ -143,7 +143,7 @@ static void run_guest_once(struct lguest *lg, 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(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. */
@@ -161,12 +161,12 @@ static void run_guest_once(struct lguest *lg, struct lguest_pages *pages)
 
 /*H:040 This is the i386-specific code to setup and run the Guest.  Interrupts
  * are disabled: we own the CPU. */
-void lguest_arch_run_guest(struct lguest *lg)
+void lguest_arch_run_guest(struct lg_cpu *cpu)
 {
         /* Remember the awfully-named TS bit?  If the Guest has asked to set it
          * we set it now, so we can trap and pass that trap to the Guest if it
          * uses the FPU. */
-        if (lg->ts)
+        if (cpu->ts)
                 lguest_set_ts();
 
         /* SYSENTER is an optimized way of doing system calls.  We can't allow
@@ -180,7 +180,7 @@ void lguest_arch_run_guest(struct lguest *lg)
         /* Now we actually run the Guest.  It will return when something
          * interesting happens, and we can examine its registers to see what it
          * was doing. */
-        run_guest_once(lg, lguest_pages(raw_smp_processor_id()));
+        run_guest_once(cpu, lguest_pages(raw_smp_processor_id()));
 
         /* Note that the "regs" pointer contains two extra entries which are
          * not really registers: a trap number which says what interrupt or
@@ -191,11 +191,11 @@ void lguest_arch_run_guest(struct lguest *lg)
          * bad virtual address.  We have to grab this now, because once we
          * re-enable interrupts an interrupt could fault and thus overwrite
          * cr2, or we could even move off to a different CPU. */
-        if (lg->regs->trapnum == 14)
-                lg->arch.last_pagefault = read_cr2();
+        if (cpu->regs->trapnum == 14)
+                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 (lg->regs->trapnum == 7)
+        else if (cpu->regs->trapnum == 7)
                 math_state_restore();
 
         /* Restore SYSENTER if it's supposed to be on. */
@@ -214,22 +214,22 @@ void lguest_arch_run_guest(struct lguest *lg)
  * When the Guest uses one of these instructions, we get a trap (General
  * Protection Fault) and come here.  We see if it's one of those troublesome
  * instructions and skip over it.  We return true if we did. */
-static int emulate_insn(struct lguest *lg)
+static int emulate_insn(struct lg_cpu *cpu)
 {
         u8 insn;
         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, lg->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
          * level. */
-        if ((lg->regs->cs & 3) != GUEST_PL)
+        if ((cpu->regs->cs & 3) != GUEST_PL)
                 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. */
@@ -237,7 +237,7 @@ static int emulate_insn(struct lguest *lg)
                 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
@@ -268,26 +268,26 @@ static int emulate_insn(struct lguest *lg)
         if (in) {
                 /* Lower bit tells is whether it's a 16 or 32 bit access */
                 if (insn & 0x1)
-                        lg->regs->eax = 0xFFFFFFFF;
+                        cpu->regs->eax = 0xFFFFFFFF;
                 else
-                        lg->regs->eax |= (0xFFFF << shift);
+                        cpu->regs->eax |= (0xFFFF << shift);
         }
         /* Finally, we've "done" the instruction, so move past it. */
-        lg->regs->eip += insnlen;
+        cpu->regs->eip += insnlen;
         /* Success! */
         return 1;
 }
 
 /*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)
 {
-        switch (lg->regs->trapnum) {
+        switch (cpu->regs->trapnum) {
         case 13: /* We've intercepted a General Protection Fault. */
                 /* Check if this was one of those annoying IN or OUT
                  * instructions which we need to emulate.  If so, we just go
                  * back into the Guest after we've done it. */
-                if (lg->regs->errcode == 0) {
-                        if (emulate_insn(lg))
+                if (cpu->regs->errcode == 0) {
+                        if (emulate_insn(cpu))
                                 return;
                 }
                 break;
@@ -301,7 +301,8 @@ void lguest_arch_handle_trap(struct lguest *lg)
                  *
                  * 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, lg->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
@@ -311,15 +312,16 @@ void lguest_arch_handle_trap(struct lguest *lg)
                  * 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(lg->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
                  * Floating Point Unit, so we just continue without telling
                  * it. */
-                if (!lg->ts)
+                if (!cpu->ts)
                         return;
                 break;
         case 32 ... 255:
@@ -332,19 +334,19 @@ 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 *)cpu->regs;
                 return;
         }
 
         /* We didn't handle the trap, so it needs to go to the Guest. */
-        if (!deliver_trap(lg, lg->regs->trapnum))
+        if (!deliver_trap(cpu, cpu->regs->trapnum))
                 /* 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)",
-                           lg->regs->trapnum, lg->regs->eip,
-                           lg->regs->trapnum == 14 ? lg->arch.last_pagefault
-                           : lg->regs->errcode);
+                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);
 }
 
 /* Now we can look at each of the routines this calls, in increasing order of
@@ -487,17 +489,17 @@ 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)
 {
         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! */
@@ -507,13 +509,14 @@ 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;
 
         /* 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(cpu->lg, cpu->hcall->arg1,
+                               sizeof(*cpu->lg->lguest_data)))
                 return -EFAULT;
 
         /* Having checked it, we simply set lg->lguest_data to point straight
@@ -521,7 +524,7 @@ 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;
+        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
@@ -534,12 +537,12 @@ int lguest_arch_init_hypercalls(struct lguest *lg)
                 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;
 }
@@ -548,9 +551,9 @@ int lguest_arch_init_hypercalls(struct lguest *lg)
  *
  * Most of the Guest's registers are left alone: we used get_zeroed_page() to
  * allocate the structure, so they will be 0. */
-void lguest_arch_setup_regs(struct lguest *lg, unsigned long start)
+void lguest_arch_setup_regs(struct lg_cpu *cpu, unsigned long start)
 {
-        struct lguest_regs *regs = lg->regs;
+        struct lguest_regs *regs = cpu->regs;
 
         /* There are four "segment" registers which the Guest needs to boot:
          * The "code segment" register (cs) refers to the kernel code segment
@@ -577,5 +580,5 @@ void lguest_arch_setup_regs(struct lguest *lg, unsigned long start)
 
         /* There are a couple of GDT entries the Guest expects when first
          * booting. */
-        setup_guest_gdt(lg);
+        setup_guest_gdt(cpu);
 }