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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH,RFC 10/17] 32-on-64 mmu ops
Index: 2006-10-04/xen/arch/x86/mm.c
===================================================================
--- 2006-10-04.orig/xen/arch/x86/mm.c 2006-10-04 15:18:51.000000000 +0200
+++ 2006-10-04/xen/arch/x86/mm.c 2006-10-04 15:18:57.000000000 +0200
@@ -106,6 +106,7 @@
#include <asm/ldt.h>
#include <asm/x86_emulate.h>
#include <asm/e820.h>
+#include <asm/hypercall.h>
#include <public/memory.h>
#ifdef VERBOSE
@@ -125,13 +126,6 @@
#define PTE_UPDATE_WITH_CMPXCHG
#endif
-/*
- * Both do_mmuext_op() and do_mmu_update():
- * We steal the m.s.b. of the @count parameter to indicate whether this
- * invocation of do_mmu_update() is resuming a previously preempted call.
- */
-#define MMU_UPDATE_PREEMPTED (~(~0U>>1))
-
/* Used to defer flushing of memory structures. */
struct percpu_mm_info {
#define DOP_FLUSH_TLB (1<<0) /* Flush the local TLB. */
@@ -2011,6 +2005,8 @@ int do_mmuext_op(
case MMUEXT_PIN_L4_TABLE:
type = PGT_l4_page_table;
+ if ( IS_COMPAT(FOREIGNDOM) )
+ break;
pin_page:
/* Ignore pinning of invalid paging levels. */
@@ -2073,7 +2069,11 @@ int do_mmuext_op(
#ifdef __x86_64__
case MMUEXT_NEW_USER_BASEPTR:
- okay = 1;
+ if ( IS_COMPAT(FOREIGNDOM) )
+ {
+ okay = 0;
+ break;
+ }
if (likely(mfn != 0))
{
if ( shadow_mode_refcounts(d) )
Index: 2006-10-04/xen/arch/x86/x86_64/compat/entry.S
===================================================================
--- 2006-10-04.orig/xen/arch/x86/x86_64/compat/entry.S 2006-10-04
15:18:51.000000000 +0200
+++ 2006-10-04/xen/arch/x86/x86_64/compat/entry.S 2006-10-04
15:18:57.000000000 +0200
@@ -279,7 +279,6 @@ CFIX14:
.section .rodata, "a", @progbits
#define compat_set_trap_table domain_crash_synchronous
-#define compat_mmu_update domain_crash_synchronous
#define compat_set_gdt domain_crash_synchronous
#define compat_platform_op domain_crash_synchronous
#define compat_multicall domain_crash_synchronous
@@ -288,7 +287,6 @@ CFIX14:
#define compat_physdev_op_compat domain_crash_synchronous
#define compat_grant_table_op domain_crash_synchronous
#define compat_vcpu_op domain_crash_synchronous
-#define compat_mmuext_op domain_crash_synchronous
#define compat_acm_op domain_crash_synchronous
#define compat_arch_sched_op domain_crash_synchronous
#define compat_xenoprof_op domain_crash_synchronous
@@ -299,7 +297,7 @@ CFIX14:
ENTRY(compat_hypercall_table)
.quad compat_set_trap_table /* 0 */
- .quad compat_mmu_update
+ .quad do_mmu_update
.quad compat_set_gdt
.quad do_stack_switch
.quad compat_set_callbacks
Index: 2006-10-04/xen/arch/x86/x86_64/compat/mm.c
===================================================================
--- 2006-10-04.orig/xen/arch/x86/x86_64/compat/mm.c 2006-10-04
15:18:51.000000000 +0200
+++ 2006-10-04/xen/arch/x86/x86_64/compat/mm.c 2006-10-04 15:18:57.000000000
+0200
@@ -1,6 +1,8 @@
#ifdef CONFIG_COMPAT
+#include <xen/event.h>
#include <compat/memory.h>
+#include <compat/xen.h>
int compat_update_descriptor(u32 pa_lo, u32 pa_hi, u32 desc_lo, u32 desc_hi)
{
@@ -115,6 +117,151 @@ int compat_update_va_mapping_otherdomain
{
return do_update_va_mapping_otherdomain(va, lo | ((u64)hi << 32), flags,
domid);
}
+
+DEFINE_XEN_GUEST_HANDLE(mmuext_op_compat_t);
+
+int compat_mmuext_op(XEN_GUEST_HANDLE(mmuext_op_compat_t) cmp_uops,
+ unsigned int count,
+ XEN_GUEST_HANDLE(uint) pdone,
+ unsigned int foreigndom)
+{
+ unsigned int i, preempt_mask;
+ int rc = 0;
+ XEN_GUEST_HANDLE(mmuext_op_t) nat_ops;
+
+ preempt_mask = count & MMU_UPDATE_PREEMPTED;
+ count ^= preempt_mask;
+
+ if ( unlikely(!guest_handle_okay(cmp_uops, count)) )
+ return -EFAULT;
+
+ set_xen_guest_handle(nat_ops, (void
*)COMPAT_ARG_XLAT_VIRT_START(current->vcpu_id));
+
+ for ( ; count; count -= i )
+ {
+ mmuext_op_t *nat_op = nat_ops.p;
+ unsigned int limit;
+ int err;
+
+ if ( hypercall_preempt_check() )
+ {
+ rc = hypercall_create_continuation(
+ __HYPERVISOR_mmuext_op, "hihi",
+ cmp_uops, count | MMU_UPDATE_PREEMPTED, pdone, foreigndom);
+ break;
+ }
+
+ limit = COMPAT_ARG_XLAT_SIZE / sizeof(*nat_op);
+
+ for ( i = 0; i < min(limit, count); ++i )
+ {
+ mmuext_op_compat_t cmp_op;
+ enum XLAT_mmuext_op_arg1 arg1;
+ enum XLAT_mmuext_op_arg2 arg2;
+
+ if ( unlikely(__copy_from_guest(&cmp_op, cmp_uops, 1) != 0) )
+ {
+ rc = -EFAULT;
+ break;
+ }
+
+ switch ( cmp_op.cmd )
+ {
+ case MMUEXT_PIN_L1_TABLE:
+ case MMUEXT_PIN_L2_TABLE:
+ case MMUEXT_PIN_L3_TABLE:
+ case MMUEXT_UNPIN_TABLE:
+ case MMUEXT_NEW_BASEPTR:
+ arg1 = XLAT_mmuext_op_arg1_mfn;
+ break;
+ default:
+ arg1 = XLAT_mmuext_op_arg1_linear_addr;
+ break;
+ case MMUEXT_PIN_L4_TABLE:
+ case MMUEXT_NEW_USER_BASEPTR:
+ rc = -EINVAL;
+ case MMUEXT_TLB_FLUSH_LOCAL:
+ case MMUEXT_TLB_FLUSH_MULTI:
+ case MMUEXT_TLB_FLUSH_ALL:
+ case MMUEXT_FLUSH_CACHE:
+ arg1 = -1;
+ break;
+ }
+
+ if ( rc )
+ break;
+
+ switch ( cmp_op.cmd )
+ {
+ case MMUEXT_SET_LDT:
+ arg2 = XLAT_mmuext_op_arg2_nr_ents;
+ break;
+ case MMUEXT_TLB_FLUSH_MULTI:
+ case MMUEXT_INVLPG_MULTI:
+ arg2 = XLAT_mmuext_op_arg2_vcpumask;
+ break;
+ default:
+ arg2 = -1;
+ break;
+ }
+
+#define XLAT_mmuext_op_HNDL_arg2_vcpumask(_d_, _s_) \
+ do \
+ { \
+ unsigned int vcpumask; \
+ if ( --limit == i ) \
+ { \
+ --i; \
+ continue; \
+ } \
+ (_d_)->arg2.vcpumask.p = (void *)(nat_ops.p + limit); \
+ if ( copy_from_compat(&vcpumask, (_s_)->arg2.vcpumask, 1) == 0
) \
+ *(_d_)->arg2.vcpumask.p = vcpumask; \
+ else \
+ rc = -EFAULT; \
+ } while(0)
+ XLAT_mmuext_op(nat_op, &cmp_op);
+#undef XLAT_mmuext_op_HNDL_arg2_vcpumask
+
+ if ( rc )
+ break;
+
+ guest_handle_add_offset(cmp_uops, 1);
+ ++nat_op;
+ }
+
+ err = do_mmuext_op(nat_ops, i | preempt_mask, pdone, foreigndom);
+
+ if ( err )
+ {
+ unsigned int done = err & ~MMU_UPDATE_PREEMPTED;
+
+ if ( done < i )
+ {
+ /*
+ * Note that the surrounding conditional is not strictly
+ * necessary - we are going to leave the function anyway, so
+ * in case of an error nobody will ever attempt to dereference
+ * the request handles anymore; only an active continuation
+ * will result in the compatibility one getting further used.
+ */
+ guest_handle_add_offset(nat_ops, done);
+ guest_handle_add_offset(cmp_uops, (long)(done - i));
+ hypercall_xlat_continuation(0x01, nat_ops, cmp_uops);
+ }
+ rc = err;
+ }
+
+ if ( rc )
+ break;
+
+ /* Force do_mmuext_op() to not start counting from zero again. */
+ preempt_mask = MMU_UPDATE_PREEMPTED;
+ }
+
+ return rc;
+}
+
#endif /* CONFIG_COMPAT */
/*
Index: 2006-10-04/xen/common/compat/xlat.c
===================================================================
--- 2006-10-04.orig/xen/common/compat/xlat.c 2006-10-04 15:11:03.000000000
+0200
+++ 2006-10-04/xen/common/compat/xlat.c 2006-10-04 15:18:57.000000000 +0200
@@ -21,6 +21,10 @@ void xlat_start_info(struct start_info *
CHECK_dom0_vga_console_info
#undef dom0_vga_console_info
+#define xen_mmu_update mmu_update
+CHECK_mmu_update
+#undef xen_mmu_update
+
#define xen_vcpu_time_info vcpu_time_info
CHECK_vcpu_time_info
#undef xen_vcpu_time_info
Index: 2006-10-04/xen/include/asm-x86/hypercall.h
===================================================================
--- 2006-10-04.orig/xen/include/asm-x86/hypercall.h 2006-05-02
16:41:35.000000000 +0200
+++ 2006-10-04/xen/include/asm-x86/hypercall.h 2006-10-04 15:18:57.000000000
+0200
@@ -7,6 +7,13 @@
#include <public/physdev.h>
+/*
+ * Both do_mmuext_op() and do_mmu_update():
+ * We steal the m.s.b. of the @count parameter to indicate whether this
+ * invocation of do_mmu_update() is resuming a previously preempted call.
+ */
+#define MMU_UPDATE_PREEMPTED (~(~0U>>1))
+
extern long
do_event_channel_op_compat(
XEN_GUEST_HANDLE(evtchn_op_t) uop);
Index: 2006-10-04/xen/include/xlat.lst
===================================================================
--- 2006-10-04.orig/xen/include/xlat.lst 2006-10-04 15:18:51.000000000
+0200
+++ 2006-10-04/xen/include/xlat.lst 2006-10-04 15:18:57.000000000 +0200
@@ -2,6 +2,8 @@
# ! - needs translation
# ? - needs checking
? dom0_vga_console_info xen.h
+? mmu_update xen.h
+! mmuext_op xen.h
! start_info xen.h
? vcpu_time_info xen.h
! add_to_physmap memory.h
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