# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1249549340 -3600
# Node ID c8cbe3033352b5771427ddf3633aba69ac0cde95
# Parent 34bdb5a29963fda7f491c3c145453264c596bdbb
ept: code clean up and formatting.
Fix alignment and comments and add and remove spaces and lines where
appropriate.
Signed-off-by: Patrick Colp <Patrick.Colp@xxxxxxxxxx>
---
xen/arch/x86/hvm/mtrr.c | 5 -
xen/arch/x86/mm/hap/p2m-ept.c | 173 +++++++++++++++++++++++-------------------
xen/include/asm-x86/mtrr.h | 5 -
3 files changed, 102 insertions(+), 81 deletions(-)
diff -r 34bdb5a29963 -r c8cbe3033352 xen/arch/x86/hvm/mtrr.c
--- a/xen/arch/x86/hvm/mtrr.c Thu Aug 06 09:54:22 2009 +0100
+++ b/xen/arch/x86/hvm/mtrr.c Thu Aug 06 10:02:20 2009 +0100
@@ -711,9 +711,8 @@ HVM_REGISTER_SAVE_RESTORE(MTRR, hvm_save
HVM_REGISTER_SAVE_RESTORE(MTRR, hvm_save_mtrr_msr, hvm_load_mtrr_msr,
1, HVMSR_PER_VCPU);
-uint8_t epte_get_entry_emt(
- struct domain *d, unsigned long gfn,
- mfn_t mfn, uint8_t *igmt, int direct_mmio)
+uint8_t epte_get_entry_emt(struct domain *d, unsigned long gfn, mfn_t mfn,
+ uint8_t *igmt, int direct_mmio)
{
uint8_t gmtrr_mtype, hmtrr_mtype;
uint32_t type;
diff -r 34bdb5a29963 -r c8cbe3033352 xen/arch/x86/mm/hap/p2m-ept.c
--- a/xen/arch/x86/mm/hap/p2m-ept.c Thu Aug 06 09:54:22 2009 +0100
+++ b/xen/arch/x86/mm/hap/p2m-ept.c Thu Aug 06 10:02:20 2009 +0100
@@ -75,7 +75,7 @@ static int ept_set_middle_entry(struct d
ept_entry->mfn = page_to_mfn(pg);
ept_entry->rsvd = 0;
ept_entry->avail2 = 0;
- /* last step */
+
ept_entry->r = ept_entry->w = ept_entry->x = 1;
return 1;
@@ -85,7 +85,8 @@ static int ept_next_level(struct domain
ept_entry_t **table, unsigned long *gfn_remainder,
u32 shift, int order)
{
- ept_entry_t *ept_entry, *next;
+ ept_entry_t *ept_entry;
+ ept_entry_t *next;
u32 index;
index = *gfn_remainder >> shift;
@@ -127,17 +128,19 @@ ept_set_entry(struct domain *d, unsigned
unsigned int order, p2m_type_t p2mt)
{
ept_entry_t *table = NULL;
- unsigned long gfn_remainder = gfn, offset = 0;
+ unsigned long gfn_remainder = gfn;
+ unsigned long offset = 0;
ept_entry_t *ept_entry = NULL;
u32 index;
- int i, rv = 0, ret = 0;
+ int i;
+ int rv = 0;
+ int ret = 0;
int walk_level = order / EPT_TABLE_ORDER;
int direct_mmio = (p2mt == p2m_mmio_direct);
uint8_t igmt = 0;
int need_modify_vtd_table = 1;
- /* we only support 4k and 2m pages now */
-
+ /* We only support 4k and 2m pages now */
BUG_ON(order && order != EPT_TABLE_ORDER);
if ( order != 0 )
@@ -166,10 +169,10 @@ ept_set_entry(struct domain *d, unsigned
if ( ret != GUEST_TABLE_SPLIT_PAGE )
{
- if ( mfn_valid(mfn_x(mfn)) || (p2mt == p2m_mmio_direct) )
- {
- ept_entry->emt = epte_get_entry_emt(d, gfn, mfn,
- &igmt, direct_mmio);
+ if ( mfn_valid(mfn_x(mfn)) || direct_mmio )
+ {
+ ept_entry->emt = epte_get_entry_emt(d, gfn, mfn, &igmt,
+ direct_mmio);
ept_entry->igmt = igmt;
ept_entry->sp_avail = walk_level ? 1 : 0;
@@ -180,10 +183,10 @@ ept_set_entry(struct domain *d, unsigned
else
ept_entry->mfn = mfn_x(mfn) - offset;
- if ( ept_entry->avail1 == p2m_ram_logdirty &&
- p2mt == p2m_ram_rw )
+ if ( (ept_entry->avail1 == p2m_ram_logdirty) &&
+ (p2mt == p2m_ram_rw) )
for ( i = 0; i < 512; i++ )
- paging_mark_dirty(d, mfn_x(mfn)-offset+i);
+ paging_mark_dirty(d, mfn_x(mfn) - offset + i);
}
else
{
@@ -196,7 +199,7 @@ ept_set_entry(struct domain *d, unsigned
ept_entry->avail1 = p2mt;
ept_entry->rsvd = 0;
ept_entry->avail2 = 0;
- /* last step */
+
ept_p2m_type_to_flags(ept_entry, p2mt);
}
else
@@ -204,57 +207,54 @@ ept_set_entry(struct domain *d, unsigned
}
else
{
- /* It's super page before, now set one of the 4k pages, so
+ /*
+ * It's super page before, now set one of the 4k pages, so
* we should split the 2m page to 4k pages now.
*/
-
ept_entry_t *split_table = NULL;
ept_entry_t *split_ept_entry = NULL;
unsigned long split_mfn = ept_entry->mfn;
p2m_type_t split_p2mt = ept_entry->avail1;
ept_entry_t new_ept_entry;
- /* alloc new page for new ept middle level entry which is
+ /*
+ * Allocate new page for new ept middle level entry which is
* before a leaf super entry
*/
-
if ( !ept_set_middle_entry(d, &new_ept_entry) )
goto out;
- /* split the super page before to 4k pages */
-
+ /* Split the super page before to 4k pages */
split_table = map_domain_page(new_ept_entry.mfn);
offset = gfn & ((1 << EPT_TABLE_ORDER) - 1);
for ( i = 0; i < 512; i++ )
{
split_ept_entry = split_table + i;
- split_ept_entry->emt = epte_get_entry_emt(d,
- gfn-offset+i, _mfn(split_mfn+i),
- &igmt, direct_mmio);
+ split_ept_entry->emt = epte_get_entry_emt(d, gfn - offset + i,
+ _mfn(split_mfn + i),
+ &igmt, direct_mmio);
split_ept_entry->igmt = igmt;
-
split_ept_entry->sp_avail = 0;
-
- split_ept_entry->mfn = split_mfn+i;
-
+ split_ept_entry->mfn = split_mfn + i;
split_ept_entry->avail1 = split_p2mt;
split_ept_entry->rsvd = 0;
split_ept_entry->avail2 = 0;
- /* last step */
+
ept_p2m_type_to_flags(split_ept_entry, split_p2mt);
}
/* Set the destinated 4k page as normal */
split_ept_entry = split_table + offset;
- split_ept_entry->emt = epte_get_entry_emt(d, gfn, mfn,
- &igmt, direct_mmio);
+ split_ept_entry->emt = epte_get_entry_emt(d, gfn, mfn, &igmt,
+ direct_mmio);
split_ept_entry->igmt = igmt;
if ( split_ept_entry->mfn == mfn_x(mfn) )
need_modify_vtd_table = 0;
else
split_ept_entry->mfn = mfn_x(mfn);
+
split_ept_entry->avail1 = p2mt;
ept_p2m_type_to_flags(split_ept_entry, p2mt);
@@ -276,16 +276,14 @@ out:
ept_sync_domain(d);
/* Now the p2m table is not shared with vt-d page table */
-
- if ( iommu_enabled && is_hvm_domain(d)
- && need_modify_vtd_table )
+ if ( iommu_enabled && is_hvm_domain(d) && need_modify_vtd_table )
{
if ( p2mt == p2m_ram_rw )
{
if ( order == EPT_TABLE_ORDER )
{
- for ( i = 0; i < ( 1 << order ); i++ )
- iommu_map_page(d, gfn-offset+i, mfn_x(mfn)-offset+i);
+ for ( i = 0; i < (1 << order); i++ )
+ iommu_map_page(d, gfn - offset + i, mfn_x(mfn) - offset +
i);
}
else if ( !order )
iommu_map_page(d, gfn, mfn_x(mfn));
@@ -294,8 +292,8 @@ out:
{
if ( order == EPT_TABLE_ORDER )
{
- for ( i = 0; i < ( 1 << order ); i++ )
- iommu_unmap_page(d, gfn-offset+i);
+ for ( i = 0; i < (1 << order); i++ )
+ iommu_unmap_page(d, gfn - offset + i);
}
else if ( !order )
iommu_unmap_page(d, gfn);
@@ -307,14 +305,15 @@ out:
/* Read ept p2m entries */
static mfn_t ept_get_entry(struct domain *d, unsigned long gfn, p2m_type_t *t,
- p2m_query_t q)
+ p2m_query_t q)
{
ept_entry_t *table =
map_domain_page(mfn_x(pagetable_get_mfn(d->arch.phys_table)));
unsigned long gfn_remainder = gfn;
ept_entry_t *ept_entry;
u32 index;
- int i, ret=0;
+ int i;
+ int ret = 0;
mfn_t mfn = _mfn(INVALID_MFN);
*t = p2m_mmio_dm;
@@ -335,7 +334,7 @@ static mfn_t ept_get_entry(struct domain
break;
}
- index = gfn_remainder >> ( i * EPT_TABLE_ORDER);
+ index = gfn_remainder >> (i * EPT_TABLE_ORDER);
ept_entry = table + index;
if ( ept_entry->avail1 != p2m_invalid )
@@ -344,11 +343,13 @@ static mfn_t ept_get_entry(struct domain
mfn = _mfn(ept_entry->mfn);
if ( i )
{
- /* we may meet super pages, and to split into 4k pages
+ /*
+ * We may meet super pages, and to split into 4k pages
* to emulate p2m table
*/
- unsigned long split_mfn =
- mfn_x(mfn) + (gfn_remainder & ( ((1 << (i*EPT_TABLE_ORDER)) - 1
)));
+ unsigned long split_mfn = mfn_x(mfn) +
+ (gfn_remainder &
+ ((1 << (i * EPT_TABLE_ORDER)) - 1));
mfn = _mfn(split_mfn);
}
}
@@ -365,9 +366,9 @@ static uint64_t ept_get_entry_content(st
unsigned long gfn_remainder = gfn;
ept_entry_t *ept_entry;
uint64_t content = 0;
-
u32 index;
- int i, ret=0;
+ int i;
+ int ret=0;
/* This pfn is higher than the highest the p2m map currently holds */
if ( gfn > d->arch.p2m->max_mapped_pfn )
@@ -383,7 +384,7 @@ static uint64_t ept_get_entry_content(st
break;
}
- index = gfn_remainder >> ( i * EPT_TABLE_ORDER);
+ index = gfn_remainder >> (i * EPT_TABLE_ORDER);
ept_entry = table + index;
content = ept_entry->epte;
@@ -398,39 +399,47 @@ static mfn_t ept_get_entry_current(unsig
return ept_get_entry(current->domain, gfn, t, q);
}
-/* To test if the new emt type is the same with old,
+/*
+ * To test if the new emt type is the same with old,
* return 1 to not to reset ept entry.
*/
static int need_modify_ept_entry(struct domain *d, unsigned long gfn,
- mfn_t mfn, uint8_t o_igmt,
- uint8_t o_emt, p2m_type_t p2mt)
-{
- uint8_t igmt, emt;
- emt = epte_get_entry_emt(d, gfn, mfn, &igmt,
- (p2mt == p2m_mmio_direct));
+ mfn_t mfn, uint8_t o_igmt, uint8_t o_emt,
+ p2m_type_t p2mt)
+{
+ uint8_t igmt;
+ uint8_t emt;
+ int direct_mmio = (p2mt == p2m_mmio_direct);
+
+ emt = epte_get_entry_emt(d, gfn, mfn, &igmt, direct_mmio);
+
if ( (emt == o_emt) && (igmt == o_igmt) )
return 0;
+
return 1;
}
void ept_change_entry_emt_with_range(struct domain *d, unsigned long start_gfn,
- unsigned long end_gfn)
+ unsigned long end_gfn)
{
unsigned long gfn;
+ uint64_t epte;
p2m_type_t p2mt;
- uint64_t epte;
int order = 0;
mfn_t mfn;
- uint8_t o_igmt, o_emt;
+ uint8_t o_igmt;
+ uint8_t o_emt;
for ( gfn = start_gfn; gfn <= end_gfn; gfn++ )
{
epte = ept_get_entry_content(d, gfn);
if ( epte == 0 )
continue;
+
mfn = _mfn((epte & EPTE_MFN_MASK) >> PAGE_SHIFT);
if ( !mfn_valid(mfn_x(mfn)) )
continue;
+
p2mt = (epte & EPTE_AVAIL1_MASK) >> EPTE_AVAIL1_SHIFT;
o_igmt = (epte & EPTE_IGMT_MASK) >> EPTE_IGMT_SHIFT;
o_emt = (epte & EPTE_EMT_MASK) >> EPTE_EMT_SHIFT;
@@ -438,45 +447,50 @@ void ept_change_entry_emt_with_range(str
if ( epte & EPTE_SUPER_PAGE_MASK )
{
- if ( !(gfn & ( (1 << EPT_TABLE_ORDER) - 1)) &&
- ((gfn + 0x1FF) <= end_gfn) )
- {
- /* gfn assigned with 2M, and the end covers more than 2m areas.
+ if ( !(gfn & ((1 << EPT_TABLE_ORDER) - 1)) &&
+ ((gfn + 0x1FF) <= end_gfn) )
+ {
+ /*
+ * gfn assigned with 2M, and the end covers more than 2m areas.
* Set emt for super page.
*/
order = EPT_TABLE_ORDER;
- if ( need_modify_ept_entry(d, gfn, mfn,
- o_igmt, o_emt, p2mt) )
+ if ( need_modify_ept_entry(d, gfn, mfn, o_igmt, o_emt, p2mt) )
ept_set_entry(d, gfn, mfn, order, p2mt);
gfn += 0x1FF;
}
else
{
- /* change emt for partial entries of the 2m area. */
- if ( need_modify_ept_entry(d, gfn, mfn,
- o_igmt, o_emt, p2mt) )
+ /* Change emt for partial entries of the 2m area. */
+ if ( need_modify_ept_entry(d, gfn, mfn, o_igmt, o_emt, p2mt) )
ept_set_entry(d, gfn, mfn, order, p2mt);
gfn = ((gfn >> EPT_TABLE_ORDER) << EPT_TABLE_ORDER) + 0x1FF;
}
}
else /* gfn assigned with 4k */
{
- if ( need_modify_ept_entry(d, gfn, mfn,
- o_igmt, o_emt, p2mt) )
+ if ( need_modify_ept_entry(d, gfn, mfn, o_igmt, o_emt, p2mt) )
ept_set_entry(d, gfn, mfn, order, p2mt);
}
}
}
-/* Walk the whole p2m table, changing any entries of the old type
+/*
+ * Walk the whole p2m table, changing any entries of the old type
* to the new type. This is used in hardware-assisted paging to
- * quickly enable or diable log-dirty tracking */
-
-static void ept_change_entry_type_global(struct domain *d,
- p2m_type_t ot, p2m_type_t nt)
-{
- ept_entry_t *l4e, *l3e, *l2e, *l1e;
- int i4, i3, i2, i1;
+ * quickly enable or diable log-dirty tracking
+ */
+static void ept_change_entry_type_global(struct domain *d, p2m_type_t ot,
+ p2m_type_t nt)
+{
+ ept_entry_t *l4e;
+ ept_entry_t *l3e;
+ ept_entry_t *l2e;
+ ept_entry_t *l1e;
+ int i4;
+ int i3;
+ int i2;
+ int i1;
if ( pagetable_get_pfn(d->arch.phys_table) == 0 )
return;
@@ -488,6 +502,7 @@ static void ept_change_entry_type_global
{
if ( !l4e[i4].epte )
continue;
+
if ( !l4e[i4].sp_avail )
{
l3e = map_domain_page(l4e[i4].mfn);
@@ -495,6 +510,7 @@ static void ept_change_entry_type_global
{
if ( !l3e[i3].epte )
continue;
+
if ( !l3e[i3].sp_avail )
{
l2e = map_domain_page(l3e[i3].mfn);
@@ -502,18 +518,22 @@ static void ept_change_entry_type_global
{
if ( !l2e[i2].epte )
continue;
+
if ( !l2e[i2].sp_avail )
{
l1e = map_domain_page(l2e[i2].mfn);
+
for ( i1 = 0; i1 < EPT_PAGETABLE_ENTRIES; i1++ )
{
if ( !l1e[i1].epte )
continue;
+
if ( l1e[i1].avail1 != ot )
continue;
l1e[i1].avail1 = nt;
ept_p2m_type_to_flags(l1e+i1, nt);
}
+
unmap_domain_page(l1e);
}
else
@@ -524,6 +544,7 @@ static void ept_change_entry_type_global
ept_p2m_type_to_flags(l2e+i2, nt);
}
}
+
unmap_domain_page(l2e);
}
else
@@ -534,6 +555,7 @@ static void ept_change_entry_type_global
ept_p2m_type_to_flags(l3e+i3, nt);
}
}
+
unmap_domain_page(l3e);
}
else
@@ -544,6 +566,7 @@ static void ept_change_entry_type_global
ept_p2m_type_to_flags(l4e+i4, nt);
}
}
+
unmap_domain_page(l4e);
ept_sync_domain(d);
diff -r 34bdb5a29963 -r c8cbe3033352 xen/include/asm-x86/mtrr.h
--- a/xen/include/asm-x86/mtrr.h Thu Aug 06 09:54:22 2009 +0100
+++ b/xen/include/asm-x86/mtrr.h Thu Aug 06 10:02:20 2009 +0100
@@ -66,9 +66,8 @@ extern void mtrr_centaur_report_mcr(int
extern void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi);
extern u32 get_pat_flags(struct vcpu *v, u32 gl1e_flags, paddr_t gpaddr,
paddr_t spaddr, uint8_t gmtrr_mtype);
-extern uint8_t epte_get_entry_emt(
- struct domain *d, unsigned long gfn, mfn_t mfn,
- uint8_t *igmt, int direct_mmio);
+extern uint8_t epte_get_entry_emt(struct domain *d, unsigned long gfn,
+ mfn_t mfn, uint8_t *igmt, int direct_mmio);
extern void ept_change_entry_emt_with_range(
struct domain *d, unsigned long start_gfn, unsigned long end_gfn);
extern unsigned char pat_type_2_pte_flags(unsigned char pat_type);
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