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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v2 9/9] x86/pagewalk: non-functional cleanup
* Drop trailing whitespace
* Consistently apply Xen style
* Introduce a local variable block
Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
CC: Jan Beulich <JBeulich@xxxxxxxx>
CC: Tim Deegan <tim@xxxxxxx>
CC: George Dunlap <george.dunlap@xxxxxxxxxxxxx>
v2:
* New
---
xen/arch/x86/mm/guest_walk.c | 82 ++++++++++++++++++++++++++++----------------
1 file changed, 53 insertions(+), 29 deletions(-)
diff --git a/xen/arch/x86/mm/guest_walk.c b/xen/arch/x86/mm/guest_walk.c
index 4ba7602..a8b72b2 100644
--- a/xen/arch/x86/mm/guest_walk.c
+++ b/xen/arch/x86/mm/guest_walk.c
@@ -81,7 +81,7 @@ static bool set_ad_bits(void *_guest_p, void *_walk_p, bool
set_dirty)
*/
bool
guest_walk_tables(struct vcpu *v, struct p2m_domain *p2m,
- unsigned long va, walk_t *gw,
+ unsigned long va, walk_t *gw,
uint32_t walk, mfn_t top_mfn, void *top_map)
{
struct domain *d = v->domain;
@@ -154,13 +154,13 @@ guest_walk_tables(struct vcpu *v, struct p2m_domain *p2m,
ar_or |= gflags;
/* Map the l3 table */
- l3p = map_domain_gfn(p2m,
- guest_l4e_get_gfn(gw->l4e),
+ l3p = map_domain_gfn(p2m,
+ guest_l4e_get_gfn(gw->l4e),
&gw->l3mfn,
&p2mt,
qt,
- &rc);
- if(l3p == NULL)
+ &rc);
+ if ( l3p == NULL )
{
gw->pfec |= rc & PFEC_synth_mask;
goto out;
@@ -178,23 +178,29 @@ guest_walk_tables(struct vcpu *v, struct p2m_domain *p2m,
gw->pfec |= PFEC_reserved_bit | PFEC_page_present;
goto out;
}
-
+
/* Accumulate l3e access rights. */
ar_and &= gflags;
ar_or |= gflags;
if ( gflags & _PAGE_PSE )
{
- /* Generate a fake l1 table entry so callers don't all
- * have to understand superpages. */
+ /*
+ * Generate a fake l1 table entry so callers don't all
+ * have to understand superpages.
+ */
gfn_t start = guest_l3e_get_gfn(gw->l3e);
- /* Grant full access in the l1e, since all the guest entry's
- * access controls are enforced in the l3e. */
+ /*
+ * Grant full access in the l1e, since all the guest entry's
+ * access controls are enforced in the l3e.
+ */
int flags = (_PAGE_PRESENT|_PAGE_USER|_PAGE_RW|
_PAGE_ACCESSED|_PAGE_DIRTY);
- /* Import cache-control bits. Note that _PAGE_PAT is actually
+ /*
+ * Import cache-control bits. Note that _PAGE_PAT is actually
* _PAGE_PSE, and it is always set. We will clear it in case
- * _PAGE_PSE_PAT (bit 12, i.e. first bit of gfn) is clear. */
+ * _PAGE_PSE_PAT (bit 12, i.e. first bit of gfn) is clear.
+ */
flags |= (guest_l3e_get_flags(gw->l3e)
& (_PAGE_PAT|_PAGE_PWT|_PAGE_PCD));
if ( !(gfn_x(start) & 1) )
@@ -227,13 +233,13 @@ guest_walk_tables(struct vcpu *v, struct p2m_domain *p2m,
#endif /* PAE or 64... */
/* Map the l2 table */
- l2p = map_domain_gfn(p2m,
- guest_l3e_get_gfn(gw->l3e),
+ l2p = map_domain_gfn(p2m,
+ guest_l3e_get_gfn(gw->l3e),
&gw->l2mfn,
- &p2mt,
+ &p2mt,
qt,
- &rc);
- if(l2p == NULL)
+ &rc);
+ if ( l2p == NULL )
{
gw->pfec |= rc & PFEC_synth_mask;
goto out;
@@ -278,22 +284,28 @@ guest_walk_tables(struct vcpu *v, struct p2m_domain *p2m,
if ( gflags & _PAGE_PSE )
{
- /* Special case: this guest VA is in a PSE superpage, so there's
+ /*
+ * Special case: this guest VA is in a PSE superpage, so there's
* no guest l1e. We make one up so that the propagation code
- * can generate a shadow l1 table. Start with the gfn of the
- * first 4k-page of the superpage. */
+ * can generate a shadow l1 table. Start with the gfn of the
+ * first 4k-page of the superpage.
+ */
#if GUEST_PAGING_LEVELS == 2
gfn_t start = _gfn(unfold_pse36(gw->l2e.l2) >> PAGE_SHIFT);
#else
gfn_t start = guest_l2e_get_gfn(gw->l2e);
#endif
- /* Grant full access in the l1e, since all the guest entry's
- * access controls are enforced in the shadow l2e. */
+ /*
+ * Grant full access in the l1e, since all the guest entry's
+ * access controls are enforced in the shadow l2e.
+ */
int flags = (_PAGE_PRESENT|_PAGE_USER|_PAGE_RW|
_PAGE_ACCESSED|_PAGE_DIRTY);
- /* Import cache-control bits. Note that _PAGE_PAT is actually
+ /*
+ * Import cache-control bits. Note that _PAGE_PAT is actually
* _PAGE_PSE, and it is always set. We will clear it in case
- * _PAGE_PSE_PAT (bit 12, i.e. first bit of gfn) is clear. */
+ * _PAGE_PSE_PAT (bit 12, i.e. first bit of gfn) is clear.
+ */
flags |= (guest_l2e_get_flags(gw->l2e)
& (_PAGE_PAT|_PAGE_PWT|_PAGE_PCD));
if ( !(gfn_x(start) & 1) )
@@ -413,10 +425,12 @@ guest_walk_tables(struct vcpu *v, struct p2m_domain *p2m,
walk_ok = true;
- /* Go back and set accessed and dirty bits only if the walk was a
+ /*
+ * Go back and set accessed and dirty bits only if the walk was a
* success. Although the PRMs say higher-level _PAGE_ACCESSED bits
* get set whenever a lower-level PT is used, at least some hardware
- * walkers behave this way. */
+ * walkers behave this way.
+ */
switch ( leaf_level )
{
default:
@@ -448,20 +462,20 @@ guest_walk_tables(struct vcpu *v, struct p2m_domain *p2m,
out:
#if GUEST_PAGING_LEVELS == 4
- if ( l3p )
+ if ( l3p )
{
unmap_domain_page(l3p);
put_page(mfn_to_page(mfn_x(gw->l3mfn)));
}
#endif
#if GUEST_PAGING_LEVELS >= 3
- if ( l2p )
+ if ( l2p )
{
unmap_domain_page(l2p);
put_page(mfn_to_page(mfn_x(gw->l2mfn)));
}
#endif
- if ( l1p )
+ if ( l1p )
{
unmap_domain_page(l1p);
put_page(mfn_to_page(mfn_x(gw->l1mfn)));
@@ -469,3 +483,13 @@ guest_walk_tables(struct vcpu *v, struct p2m_domain *p2m,
return walk_ok;
}
+
+/*
+ * Local variables:
+ * mode: C
+ * c-file-style: "BSD"
+ * c-basic-offset: 4
+ * tab-width: 4
+ * indent-tabs-mode: nil
+ * End:
+ */
--
2.1.4
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