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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH Altp2m cleanup v5 3/3] Making altp2m domain dynamically allocated.
Ravi Sahita's dynamically allocated altp2m domain.
Introduce set_altp2m_active() and altp2m_active() api()s.
Signed-off-by: Ravi Sahita <ravi.sahita@xxxxxxxxx>
Signed-off-by: Paul Lai <paul.c.lai@xxxxxxxxx>
---
xen/arch/x86/hvm/hvm.c | 8 +++---
xen/arch/x86/hvm/vmx/vmx.c | 2 +-
xen/arch/x86/mm/altp2m.c | 16 +++++------
xen/arch/x86/mm/mem_sharing.c | 2 +-
xen/arch/x86/mm/mm-locks.h | 4 +--
xen/arch/x86/mm/p2m-ept.c | 10 +++----
xen/arch/x86/mm/p2m.c | 63 ++++++++++++++++++++++++-------------------
xen/common/monitor.c | 1 +
xen/include/asm-x86/altp2m.h | 7 ++++-
xen/include/asm-x86/domain.h | 6 ++---
xen/include/asm-x86/p2m.h | 9 ++++++-
11 files changed, 73 insertions(+), 55 deletions(-)
diff --git a/xen/arch/x86/hvm/hvm.c b/xen/arch/x86/hvm/hvm.c
index 1bf2d01..ac692ab 100644
--- a/xen/arch/x86/hvm/hvm.c
+++ b/xen/arch/x86/hvm/hvm.c
@@ -5259,7 +5259,7 @@ static int do_altp2m_op(
if ( (a.cmd != HVMOP_altp2m_get_domain_state) &&
(a.cmd != HVMOP_altp2m_set_domain_state) &&
- !d->arch.altp2m_active )
+ !altp2m_active(d) )
{
rc = -EOPNOTSUPP;
goto out;
@@ -5293,11 +5293,11 @@ static int do_altp2m_op(
break;
}
- ostate = d->arch.altp2m_active;
- d->arch.altp2m_active = !!a.u.domain_state.state;
+ ostate = altp2m_active(d);
+ set_altp2m_active(d, a.u.domain_state.state);
/* If the alternate p2m state has changed, handle appropriately */
- if ( d->arch.altp2m_active != ostate &&
+ if ( altp2m_active(d) != ostate &&
(ostate || !(rc = p2m_init_altp2m_by_id(d, 0))) )
{
for_each_vcpu( d, v )
diff --git a/xen/arch/x86/hvm/vmx/vmx.c b/xen/arch/x86/hvm/vmx/vmx.c
index bb7a329..699e9b1 100644
--- a/xen/arch/x86/hvm/vmx/vmx.c
+++ b/xen/arch/x86/hvm/vmx/vmx.c
@@ -2018,7 +2018,7 @@ static void vmx_vcpu_update_vmfunc_ve(struct vcpu *v)
{
v->arch.hvm_vmx.secondary_exec_control |= mask;
__vmwrite(VM_FUNCTION_CONTROL, VMX_VMFUNC_EPTP_SWITCHING);
- __vmwrite(EPTP_LIST_ADDR, virt_to_maddr(d->arch.altp2m_eptp));
+ __vmwrite(EPTP_LIST_ADDR, virt_to_maddr(d->arch.altp2m->eptp));
if ( cpu_has_vmx_virt_exceptions )
{
diff --git a/xen/arch/x86/mm/altp2m.c b/xen/arch/x86/mm/altp2m.c
index 62801ae..7917a1e 100644
--- a/xen/arch/x86/mm/altp2m.c
+++ b/xen/arch/x86/mm/altp2m.c
@@ -87,20 +87,20 @@ altp2m_domain_init(struct domain *d)
return 0;
/* Init alternate p2m data. */
- if ( (d->arch.altp2m_eptp = alloc_xenheap_page()) == NULL )
+ if ( (d->arch.altp2m->eptp = alloc_xenheap_page()) == NULL )
return -ENOMEM;
for ( i = 0; i < MAX_EPTP; i++ )
- d->arch.altp2m_eptp[i] = mfn_x(INVALID_MFN);
+ d->arch.altp2m->eptp[i] = mfn_x(INVALID_MFN);
for ( i = 0; i < MAX_ALTP2M; i++ )
{
- rc = p2m_alloc_table(d->arch.altp2m_p2m[i]);
+ rc = p2m_alloc_table(d->arch.altp2m->p2m[i]);
if ( rc != 0 )
return rc;
}
- d->arch.altp2m_active = 0;
+ set_altp2m_active(d, false);
return rc;
}
@@ -113,13 +113,13 @@ altp2m_domain_teardown(struct domain *d)
if ( !hvm_altp2m_supported() )
return;
- d->arch.altp2m_active = 0;
+ set_altp2m_active(d, false);
- free_xenheap_page(d->arch.altp2m_eptp);
- d->arch.altp2m_eptp = NULL;
+ free_xenheap_page(d->arch.altp2m->eptp);
+ d->arch.altp2m->eptp = NULL;
for ( i = 0; i < MAX_ALTP2M; i++ )
- p2m_teardown(d->arch.altp2m_p2m[i]);
+ p2m_teardown(d->arch.altp2m->p2m[i]);
}
/*
diff --git a/xen/arch/x86/mm/mem_sharing.c b/xen/arch/x86/mm/mem_sharing.c
index e7c6b74..3fd8380 100644
--- a/xen/arch/x86/mm/mem_sharing.c
+++ b/xen/arch/x86/mm/mem_sharing.c
@@ -877,7 +877,7 @@ int mem_sharing_nominate_page(struct domain *d,
for ( i = 0; i < MAX_ALTP2M; i++ )
{
- ap2m = d->arch.altp2m_p2m[i];
+ ap2m = d->arch.altp2m->p2m[i];
if ( !ap2m )
continue;
diff --git a/xen/arch/x86/mm/mm-locks.h b/xen/arch/x86/mm/mm-locks.h
index 74fdfc1..71d3891 100644
--- a/xen/arch/x86/mm/mm-locks.h
+++ b/xen/arch/x86/mm/mm-locks.h
@@ -266,8 +266,8 @@ declare_mm_order_constraint(per_page_sharing)
*/
declare_mm_lock(altp2mlist)
-#define altp2m_list_lock(d) mm_lock(altp2mlist, &(d)->arch.altp2m_list_lock)
-#define altp2m_list_unlock(d) mm_unlock(&(d)->arch.altp2m_list_lock)
+#define altp2m_list_lock(d) mm_lock(altp2mlist, &(d)->arch.altp2m->list_lock)
+#define altp2m_list_unlock(d) mm_unlock(&(d)->arch.altp2m->list_lock)
/* P2M lock (per-altp2m-table)
*
diff --git a/xen/arch/x86/mm/p2m-ept.c b/xen/arch/x86/mm/p2m-ept.c
index 04878f5..9459d87 100644
--- a/xen/arch/x86/mm/p2m-ept.c
+++ b/xen/arch/x86/mm/p2m-ept.c
@@ -1331,14 +1331,14 @@ void setup_ept_dump(void)
void p2m_init_altp2m_ept(struct domain *d, unsigned int i)
{
- struct p2m_domain *p2m = d->arch.altp2m_p2m[i];
+ struct p2m_domain *p2m = d->arch.altp2m->p2m[i];
struct ept_data *ept;
p2m->min_remapped_gfn = gfn_x(INVALID_GFN);
- p2m->max_remapped_gfn = 0;
+ p2m->max_remapped_gfn = gfn_x(_gfn(0UL));
ept = &p2m->ept;
ept->asr = pagetable_get_pfn(p2m_get_pagetable(p2m));
- d->arch.altp2m_eptp[i] = ept_get_eptp(ept);
+ d->arch.altp2m->eptp[i] = ept_get_eptp(ept);
}
unsigned int p2m_find_altp2m_by_eptp(struct domain *d, uint64_t eptp)
@@ -1351,10 +1351,10 @@ unsigned int p2m_find_altp2m_by_eptp(struct domain *d,
uint64_t eptp)
for ( i = 0; i < MAX_ALTP2M; i++ )
{
- if ( d->arch.altp2m_eptp[i] == mfn_x(INVALID_MFN) )
+ if ( d->arch.altp2m->eptp[i] == mfn_x(INVALID_MFN) )
continue;
- p2m = d->arch.altp2m_p2m[i];
+ p2m = d->arch.altp2m->p2m[i];
ept = &p2m->ept;
if ( eptp == ept_get_eptp(ept) )
diff --git a/xen/arch/x86/mm/p2m.c b/xen/arch/x86/mm/p2m.c
index fa1ad4a..970a56c 100644
--- a/xen/arch/x86/mm/p2m.c
+++ b/xen/arch/x86/mm/p2m.c
@@ -191,14 +191,17 @@ static void p2m_teardown_altp2m(struct domain *d)
unsigned int i;
struct p2m_domain *p2m;
+ if ( d->arch.altp2m == NULL )
+ return;
+
for ( i = 0; i < MAX_ALTP2M; i++ )
{
- if ( !d->arch.altp2m_p2m[i] )
- continue;
- p2m = d->arch.altp2m_p2m[i];
+ p2m = d->arch.altp2m->p2m[i];
p2m_free_one(p2m);
- d->arch.altp2m_p2m[i] = NULL;
+ d->arch.altp2m->p2m[i] = NULL;
}
+
+ xfree(d->arch.altp2m);
}
static int p2m_init_altp2m(struct domain *d)
@@ -206,10 +209,14 @@ static int p2m_init_altp2m(struct domain *d)
unsigned int i;
struct p2m_domain *p2m;
- mm_lock_init(&d->arch.altp2m_list_lock);
+ d->arch.altp2m = xzalloc(struct altp2m_domain);
+ if ( d->arch.altp2m == NULL )
+ return -ENOMEM;
+
+ mm_lock_init(&d->arch.altp2m->list_lock);
for ( i = 0; i < MAX_ALTP2M; i++ )
{
- d->arch.altp2m_p2m[i] = p2m = p2m_init_one(d);
+ d->arch.altp2m->p2m[i] = p2m = p2m_init_one(d);
if ( p2m == NULL )
{
p2m_teardown_altp2m(d);
@@ -1845,10 +1852,10 @@ long p2m_set_mem_access(struct domain *d, gfn_t gfn,
uint32_t nr,
if ( altp2m_idx )
{
if ( altp2m_idx >= MAX_ALTP2M ||
- d->arch.altp2m_eptp[altp2m_idx] == mfn_x(INVALID_MFN) )
+ d->arch.altp2m->eptp[altp2m_idx] == mfn_x(INVALID_MFN) )
return -EINVAL;
- ap2m = d->arch.altp2m_p2m[altp2m_idx];
+ ap2m = d->arch.altp2m->p2m[altp2m_idx];
}
switch ( access )
@@ -2289,7 +2296,7 @@ bool_t p2m_switch_vcpu_altp2m_by_id(struct vcpu *v,
unsigned int idx)
altp2m_list_lock(d);
- if ( d->arch.altp2m_eptp[idx] != mfn_x(INVALID_MFN) )
+ if ( d->arch.altp2m->eptp[idx] != mfn_x(INVALID_MFN) )
{
if ( idx != vcpu_altp2m(v).p2midx )
{
@@ -2374,11 +2381,11 @@ void p2m_flush_altp2m(struct domain *d)
for ( i = 0; i < MAX_ALTP2M; i++ )
{
- p2m_flush_table(d->arch.altp2m_p2m[i]);
+ p2m_flush_table(d->arch.altp2m->p2m[i]);
/* Uninit and reinit ept to force TLB shootdown */
- ept_p2m_uninit(d->arch.altp2m_p2m[i]);
- ept_p2m_init(d->arch.altp2m_p2m[i]);
- d->arch.altp2m_eptp[i] = mfn_x(INVALID_MFN);
+ ept_p2m_uninit(d->arch.altp2m->p2m[i]);
+ ept_p2m_init(d->arch.altp2m->p2m[i]);
+ d->arch.altp2m->eptp[i] = mfn_x(INVALID_MFN);
}
altp2m_list_unlock(d);
@@ -2393,7 +2400,7 @@ int p2m_init_altp2m_by_id(struct domain *d, unsigned int
idx)
altp2m_list_lock(d);
- if ( d->arch.altp2m_eptp[idx] == mfn_x(INVALID_MFN) )
+ if ( d->arch.altp2m->eptp[idx] == mfn_x(INVALID_MFN) )
{
p2m_init_altp2m_ept(d, idx);
rc = 0;
@@ -2412,7 +2419,7 @@ int p2m_init_next_altp2m(struct domain *d, uint16_t *idx)
for ( i = 0; i < MAX_ALTP2M; i++ )
{
- if ( d->arch.altp2m_eptp[i] != mfn_x(INVALID_MFN) )
+ if ( d->arch.altp2m->eptp[i] != mfn_x(INVALID_MFN) )
continue;
p2m_init_altp2m_ept(d, i);
@@ -2438,17 +2445,17 @@ int p2m_destroy_altp2m_by_id(struct domain *d, unsigned
int idx)
altp2m_list_lock(d);
- if ( d->arch.altp2m_eptp[idx] != mfn_x(INVALID_MFN) )
+ if ( d->arch.altp2m->eptp[idx] != mfn_x(INVALID_MFN) )
{
- p2m = d->arch.altp2m_p2m[idx];
+ p2m = d->arch.altp2m->p2m[idx];
if ( !_atomic_read(p2m->active_vcpus) )
{
- p2m_flush_table(d->arch.altp2m_p2m[idx]);
+ p2m_flush_table(d->arch.altp2m->p2m[idx]);
/* Uninit and reinit ept to force TLB shootdown */
- ept_p2m_uninit(d->arch.altp2m_p2m[idx]);
- ept_p2m_init(d->arch.altp2m_p2m[idx]);
- d->arch.altp2m_eptp[idx] = mfn_x(INVALID_MFN);
+ ept_p2m_uninit(d->arch.altp2m->p2m[idx]);
+ ept_p2m_init(d->arch.altp2m->p2m[idx]);
+ d->arch.altp2m->eptp[idx] = mfn_x(INVALID_MFN);
rc = 0;
}
}
@@ -2472,7 +2479,7 @@ int p2m_switch_domain_altp2m_by_id(struct domain *d,
unsigned int idx)
altp2m_list_lock(d);
- if ( d->arch.altp2m_eptp[idx] != mfn_x(INVALID_MFN) )
+ if ( d->arch.altp2m->eptp[idx] != mfn_x(INVALID_MFN) )
{
for_each_vcpu( d, v )
if ( idx != vcpu_altp2m(v).p2midx )
@@ -2503,11 +2510,11 @@ int p2m_change_altp2m_gfn(struct domain *d, unsigned
int idx,
unsigned int page_order;
int rc = -EINVAL;
- if ( idx >= MAX_ALTP2M || d->arch.altp2m_eptp[idx] == mfn_x(INVALID_MFN) )
+ if ( idx >= MAX_ALTP2M || d->arch.altp2m->eptp[idx] == mfn_x(INVALID_MFN) )
return rc;
hp2m = p2m_get_hostp2m(d);
- ap2m = d->arch.altp2m_p2m[idx];
+ ap2m = d->arch.altp2m->p2m[idx];
p2m_lock(ap2m);
@@ -2599,10 +2606,10 @@ void p2m_altp2m_propagate_change(struct domain *d,
gfn_t gfn,
for ( i = 0; i < MAX_ALTP2M; i++ )
{
- if ( d->arch.altp2m_eptp[i] == mfn_x(INVALID_MFN) )
+ if ( d->arch.altp2m->eptp[i] == mfn_x(INVALID_MFN) )
continue;
- p2m = d->arch.altp2m_p2m[i];
+ p2m = d->arch.altp2m->p2m[i];
m = get_gfn_type_access(p2m, gfn_x(gfn), &t, &a, 0, NULL);
/* Check for a dropped page that may impact this altp2m */
@@ -2623,10 +2630,10 @@ void p2m_altp2m_propagate_change(struct domain *d,
gfn_t gfn,
for ( i = 0; i < MAX_ALTP2M; i++ )
{
if ( i == last_reset_idx ||
- d->arch.altp2m_eptp[i] == mfn_x(INVALID_MFN) )
+ d->arch.altp2m->eptp[i] == mfn_x(INVALID_MFN) )
continue;
- p2m = d->arch.altp2m_p2m[i];
+ p2m = d->arch.altp2m->p2m[i];
p2m_lock(p2m);
p2m_reset_altp2m(p2m);
p2m_unlock(p2m);
diff --git a/xen/common/monitor.c b/xen/common/monitor.c
index c73d1d5..d6b3f90 100644
--- a/xen/common/monitor.c
+++ b/xen/common/monitor.c
@@ -24,6 +24,7 @@
#include <xen/sched.h>
#include <xen/vm_event.h>
#include <xsm/xsm.h>
+#include <asm/p2m.h>
#include <asm/altp2m.h>
#include <asm/monitor.h>
#include <asm/vm_event.h>
diff --git a/xen/include/asm-x86/altp2m.h b/xen/include/asm-x86/altp2m.h
index 0090c89..65a7ead 100644
--- a/xen/include/asm-x86/altp2m.h
+++ b/xen/include/asm-x86/altp2m.h
@@ -24,7 +24,12 @@
/* Alternate p2m HVM on/off per domain */
static inline bool_t altp2m_active(const struct domain *d)
{
- return d->arch.altp2m_active;
+ return d->arch.altp2m->active;
+}
+
+static inline void set_altp2m_active(const struct domain *d, bool_t v)
+{
+ d->arch.altp2m->active = v;
}
/* Alternate p2m VCPU */
diff --git a/xen/include/asm-x86/domain.h b/xen/include/asm-x86/domain.h
index 5807a1f..3b9fcc1 100644
--- a/xen/include/asm-x86/domain.h
+++ b/xen/include/asm-x86/domain.h
@@ -242,6 +242,7 @@ typedef xen_domctl_cpuid_t cpuid_input_t;
#define INVALID_ALTP2M 0xffff
#define MAX_EPTP (PAGE_SIZE / sizeof(uint64_t))
struct p2m_domain;
+struct altp2m_domain;
struct time_scale {
int shift;
u32 mul_frac;
@@ -320,10 +321,7 @@ struct arch_domain
mm_lock_t nested_p2m_lock;
/* altp2m: allow multiple copies of host p2m */
- bool_t altp2m_active;
- struct p2m_domain *altp2m_p2m[MAX_ALTP2M];
- mm_lock_t altp2m_list_lock;
- uint64_t *altp2m_eptp;
+ struct altp2m_domain *altp2m;
/* NB. protected by d->event_lock and by irq_desc[irq].lock */
struct radix_tree_root irq_pirq;
diff --git a/xen/include/asm-x86/p2m.h b/xen/include/asm-x86/p2m.h
index 0c5b391..cf30924 100644
--- a/xen/include/asm-x86/p2m.h
+++ b/xen/include/asm-x86/p2m.h
@@ -338,6 +338,13 @@ struct p2m_domain {
};
};
+struct altp2m_domain {
+ bool_t active;
+ struct p2m_domain *p2m[MAX_ALTP2M];
+ mm_lock_t list_lock;
+ uint64_t *eptp;
+};
+
/* get host p2m table */
#define p2m_get_hostp2m(d) ((d)->arch.p2m)
@@ -778,7 +785,7 @@ static inline struct p2m_domain *p2m_get_altp2m(struct vcpu
*v)
BUG_ON(index >= MAX_ALTP2M);
- return v->domain->arch.altp2m_p2m[index];
+ return v->domain->arch.altp2m->p2m[index];
}
/* Switch alternate p2m for a single vcpu */
--
2.7.4
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