* [PATCH 1/6] x86/HVM: honor cache attribute pinning for RAM only
2016-03-03 16:28 [PATCH 0/6] x86/HVM: cache attribute pinning adjustments Jan Beulich
@ 2016-03-03 16:33 ` Jan Beulich
2016-03-03 17:36 ` Andrew Cooper
2016-03-03 16:36 ` [PATCH 2/6] x86/HVM: remove unnecessary indirection from hvm_get_mem_pinned_cacheattr() Jan Beulich
` (5 subsequent siblings)
6 siblings, 1 reply; 16+ messages in thread
From: Jan Beulich @ 2016-03-03 16:33 UTC (permalink / raw)
To: xen-devel; +Cc: Andrew Cooper, Keir Fraser, Wei Liu, Tim Deegan
[-- Attachment #1: Type: text/plain, Size: 2304 bytes --]
Call hvm_get_mem_pinned_cacheattr() for RAM ranges only, and only when
the guest has a physical device assigned: XEN_DOMCTL_pin_mem_cacheattr
is documented to be intended for RAM only.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
--- a/xen/arch/x86/hvm/mtrr.c
+++ b/xen/arch/x86/hvm/mtrr.c
@@ -782,32 +782,29 @@ int epte_get_entry_emt(struct domain *d,
mfn_x(mfn) + (1UL << order) - 1) )
return -1;
- switch ( hvm_get_mem_pinned_cacheattr(d, gfn, order, &type) )
+ if ( direct_mmio )
{
- case 1:
+ if ( (mfn_x(mfn) ^ d->arch.hvm_domain.vmx.apic_access_mfn) >> order )
+ return MTRR_TYPE_UNCACHABLE;
+ if ( order )
+ return -1;
*ipat = 1;
- return type != PAT_TYPE_UC_MINUS ? type : PAT_TYPE_UNCACHABLE;
- case -1:
- return -1;
+ return MTRR_TYPE_WRBACK;
}
if ( !need_iommu(d) && !cache_flush_permitted(d) )
{
- ASSERT(!direct_mmio ||
- !((mfn_x(mfn) ^ d->arch.hvm_domain.vmx.apic_access_mfn) >>
- order));
*ipat = 1;
return MTRR_TYPE_WRBACK;
}
- if ( direct_mmio )
+ switch ( hvm_get_mem_pinned_cacheattr(d, gfn, order, &type) )
{
- if ( (mfn_x(mfn) ^ d->arch.hvm_domain.vmx.apic_access_mfn) >> order )
- return MTRR_TYPE_UNCACHABLE;
- if ( order )
- return -1;
+ case 1:
*ipat = 1;
- return MTRR_TYPE_WRBACK;
+ return type != PAT_TYPE_UC_MINUS ? type : PAT_TYPE_UNCACHABLE;
+ case -1:
+ return -1;
}
gmtrr_mtype = is_hvm_domain(d) && v ?
--- a/xen/arch/x86/mm/shadow/multi.c
+++ b/xen/arch/x86/mm/shadow/multi.c
@@ -618,7 +618,8 @@ _sh_propagate(struct vcpu *v,
* 3) if disables snoop control, compute the PAT index with
* gMTRR and gPAT.
*/
- if ( hvm_get_mem_pinned_cacheattr(d, gfn_x(target_gfn), 0, &type) )
+ if ( !mmio_mfn &&
+ hvm_get_mem_pinned_cacheattr(d, gfn_x(target_gfn), 0, &type) )
sflags |= pat_type_2_pte_flags(type);
else if ( d->arch.hvm_domain.is_in_uc_mode )
sflags |= pat_type_2_pte_flags(PAT_TYPE_UNCACHABLE);
[-- Attachment #2: x86-HVM-mem-pinned-cacheattr-RAM.patch --]
[-- Type: text/plain, Size: 2353 bytes --]
x86/HVM: honor cache attribute pinning for RAM only
Call hvm_get_mem_pinned_cacheattr() for RAM ranges only, and only when
the guest has a physical device assigned: XEN_DOMCTL_pin_mem_cacheattr
is documented to be intended for RAM only.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
--- a/xen/arch/x86/hvm/mtrr.c
+++ b/xen/arch/x86/hvm/mtrr.c
@@ -782,32 +782,29 @@ int epte_get_entry_emt(struct domain *d,
mfn_x(mfn) + (1UL << order) - 1) )
return -1;
- switch ( hvm_get_mem_pinned_cacheattr(d, gfn, order, &type) )
+ if ( direct_mmio )
{
- case 1:
+ if ( (mfn_x(mfn) ^ d->arch.hvm_domain.vmx.apic_access_mfn) >> order )
+ return MTRR_TYPE_UNCACHABLE;
+ if ( order )
+ return -1;
*ipat = 1;
- return type != PAT_TYPE_UC_MINUS ? type : PAT_TYPE_UNCACHABLE;
- case -1:
- return -1;
+ return MTRR_TYPE_WRBACK;
}
if ( !need_iommu(d) && !cache_flush_permitted(d) )
{
- ASSERT(!direct_mmio ||
- !((mfn_x(mfn) ^ d->arch.hvm_domain.vmx.apic_access_mfn) >>
- order));
*ipat = 1;
return MTRR_TYPE_WRBACK;
}
- if ( direct_mmio )
+ switch ( hvm_get_mem_pinned_cacheattr(d, gfn, order, &type) )
{
- if ( (mfn_x(mfn) ^ d->arch.hvm_domain.vmx.apic_access_mfn) >> order )
- return MTRR_TYPE_UNCACHABLE;
- if ( order )
- return -1;
+ case 1:
*ipat = 1;
- return MTRR_TYPE_WRBACK;
+ return type != PAT_TYPE_UC_MINUS ? type : PAT_TYPE_UNCACHABLE;
+ case -1:
+ return -1;
}
gmtrr_mtype = is_hvm_domain(d) && v ?
--- a/xen/arch/x86/mm/shadow/multi.c
+++ b/xen/arch/x86/mm/shadow/multi.c
@@ -618,7 +618,8 @@ _sh_propagate(struct vcpu *v,
* 3) if disables snoop control, compute the PAT index with
* gMTRR and gPAT.
*/
- if ( hvm_get_mem_pinned_cacheattr(d, gfn_x(target_gfn), 0, &type) )
+ if ( !mmio_mfn &&
+ hvm_get_mem_pinned_cacheattr(d, gfn_x(target_gfn), 0, &type) )
sflags |= pat_type_2_pte_flags(type);
else if ( d->arch.hvm_domain.is_in_uc_mode )
sflags |= pat_type_2_pte_flags(PAT_TYPE_UNCACHABLE);
[-- Attachment #3: Type: text/plain, Size: 126 bytes --]
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http://lists.xen.org/xen-devel
^ permalink raw reply [flat|nested] 16+ messages in thread* [PATCH 2/6] x86/HVM: remove unnecessary indirection from hvm_get_mem_pinned_cacheattr()
2016-03-03 16:28 [PATCH 0/6] x86/HVM: cache attribute pinning adjustments Jan Beulich
2016-03-03 16:33 ` [PATCH 1/6] x86/HVM: honor cache attribute pinning for RAM only Jan Beulich
@ 2016-03-03 16:36 ` Jan Beulich
2016-03-03 16:59 ` Wei Liu
2016-03-03 17:35 ` Andrew Cooper
2016-03-03 16:37 ` [PATCH 3/6] x86/HVM: adjust hvm_set_mem_pinned_cacheattr() error indications Jan Beulich
` (4 subsequent siblings)
6 siblings, 2 replies; 16+ messages in thread
From: Jan Beulich @ 2016-03-03 16:36 UTC (permalink / raw)
To: xen-devel; +Cc: Andrew Cooper, Keir Fraser, Wei Liu, Tim Deegan
[-- Attachment #1: Type: text/plain, Size: 3651 bytes --]
Its return value can easily serve the purpose. We cannot, however,
return unspecific "success" anymore for a domain of the wrong type -
since no caller exists that would call this for PV domains, simply add
an ASSERT().
Signed-off-by: Jan Beulich <jbeulich@suse.com>
--- a/xen/arch/x86/hvm/mtrr.c
+++ b/xen/arch/x86/hvm/mtrr.c
@@ -546,17 +546,13 @@ void hvm_destroy_cacheattr_region_list(
int hvm_get_mem_pinned_cacheattr(
struct domain *d,
uint64_t guest_fn,
- unsigned int order,
- uint32_t *type)
+ unsigned int order)
{
struct hvm_mem_pinned_cacheattr_range *range;
uint64_t mask = ~(uint64_t)0 << order;
- int rc = 0;
+ int rc = -ENXIO;
- *type = ~0;
-
- if ( !is_hvm_domain(d) )
- return 0;
+ ASSERT(has_hvm_container_domain(d));
rcu_read_lock(&pinned_cacheattr_rcu_lock);
list_for_each_entry_rcu ( range,
@@ -566,14 +562,13 @@ int hvm_get_mem_pinned_cacheattr(
if ( ((guest_fn & mask) >= range->start) &&
((guest_fn | ~mask) <= range->end) )
{
- *type = range->type;
- rc = 1;
+ rc = range->type;
break;
}
if ( ((guest_fn & mask) <= range->end) &&
(range->start <= (guest_fn | ~mask)) )
{
- rc = -1;
+ rc = -EADDRNOTAVAIL;
break;
}
}
@@ -762,7 +757,6 @@ int epte_get_entry_emt(struct domain *d,
unsigned int order, uint8_t *ipat, bool_t direct_mmio)
{
int gmtrr_mtype, hmtrr_mtype;
- uint32_t type;
struct vcpu *v = current;
*ipat = 0;
@@ -798,14 +792,15 @@ int epte_get_entry_emt(struct domain *d,
return MTRR_TYPE_WRBACK;
}
- switch ( hvm_get_mem_pinned_cacheattr(d, gfn, order, &type) )
+ gmtrr_mtype = hvm_get_mem_pinned_cacheattr(d, gfn, order);
+ if ( gmtrr_mtype >= 0 )
{
- case 1:
*ipat = 1;
- return type != PAT_TYPE_UC_MINUS ? type : PAT_TYPE_UNCACHABLE;
- case -1:
- return -1;
+ return gmtrr_mtype != PAT_TYPE_UC_MINUS ? gmtrr_mtype
+ : MTRR_TYPE_UNCACHABLE;
}
+ if ( gmtrr_mtype == -EADDRNOTAVAIL )
+ return -1;
gmtrr_mtype = is_hvm_domain(d) && v ?
get_mtrr_type(&v->arch.hvm_vcpu.mtrr,
--- a/xen/arch/x86/mm/shadow/multi.c
+++ b/xen/arch/x86/mm/shadow/multi.c
@@ -607,7 +607,7 @@ _sh_propagate(struct vcpu *v,
if ( (level == 1) && is_hvm_domain(d) &&
!is_xen_heap_mfn(mfn_x(target_mfn)) )
{
- unsigned int type;
+ int type;
ASSERT(!(sflags & (_PAGE_PAT | _PAGE_PCD | _PAGE_PWT)));
@@ -619,7 +619,8 @@ _sh_propagate(struct vcpu *v,
* gMTRR and gPAT.
*/
if ( !mmio_mfn &&
- hvm_get_mem_pinned_cacheattr(d, gfn_x(target_gfn), 0, &type) )
+ (type = hvm_get_mem_pinned_cacheattr(d, gfn_x(target_gfn),
+ 0)) >= 0 )
sflags |= pat_type_2_pte_flags(type);
else if ( d->arch.hvm_domain.is_in_uc_mode )
sflags |= pat_type_2_pte_flags(PAT_TYPE_UNCACHABLE);
--- a/xen/include/asm-x86/hvm/cacheattr.h
+++ b/xen/include/asm-x86/hvm/cacheattr.h
@@ -15,8 +15,7 @@ void hvm_destroy_cacheattr_region_list(
int hvm_get_mem_pinned_cacheattr(
struct domain *d,
uint64_t guest_fn,
- unsigned int order,
- uint32_t *type);
+ unsigned int order);
/* Set pinned caching type for a domain. */
[-- Attachment #2: x86-HVM-mem-pinned-cacheattr-indirection.patch --]
[-- Type: text/plain, Size: 3724 bytes --]
x86/HVM: remove unnecessary indirection from hvm_get_mem_pinned_cacheattr()
Its return value can easily serve the purpose. We cannot, however,
return unspecific "success" anymore for a domain of the wrong type -
since no caller exists that would call this for PV domains, simply add
an ASSERT().
Signed-off-by: Jan Beulich <jbeulich@suse.com>
--- a/xen/arch/x86/hvm/mtrr.c
+++ b/xen/arch/x86/hvm/mtrr.c
@@ -546,17 +546,13 @@ void hvm_destroy_cacheattr_region_list(
int hvm_get_mem_pinned_cacheattr(
struct domain *d,
uint64_t guest_fn,
- unsigned int order,
- uint32_t *type)
+ unsigned int order)
{
struct hvm_mem_pinned_cacheattr_range *range;
uint64_t mask = ~(uint64_t)0 << order;
- int rc = 0;
+ int rc = -ENXIO;
- *type = ~0;
-
- if ( !is_hvm_domain(d) )
- return 0;
+ ASSERT(has_hvm_container_domain(d));
rcu_read_lock(&pinned_cacheattr_rcu_lock);
list_for_each_entry_rcu ( range,
@@ -566,14 +562,13 @@ int hvm_get_mem_pinned_cacheattr(
if ( ((guest_fn & mask) >= range->start) &&
((guest_fn | ~mask) <= range->end) )
{
- *type = range->type;
- rc = 1;
+ rc = range->type;
break;
}
if ( ((guest_fn & mask) <= range->end) &&
(range->start <= (guest_fn | ~mask)) )
{
- rc = -1;
+ rc = -EADDRNOTAVAIL;
break;
}
}
@@ -762,7 +757,6 @@ int epte_get_entry_emt(struct domain *d,
unsigned int order, uint8_t *ipat, bool_t direct_mmio)
{
int gmtrr_mtype, hmtrr_mtype;
- uint32_t type;
struct vcpu *v = current;
*ipat = 0;
@@ -798,14 +792,15 @@ int epte_get_entry_emt(struct domain *d,
return MTRR_TYPE_WRBACK;
}
- switch ( hvm_get_mem_pinned_cacheattr(d, gfn, order, &type) )
+ gmtrr_mtype = hvm_get_mem_pinned_cacheattr(d, gfn, order);
+ if ( gmtrr_mtype >= 0 )
{
- case 1:
*ipat = 1;
- return type != PAT_TYPE_UC_MINUS ? type : PAT_TYPE_UNCACHABLE;
- case -1:
- return -1;
+ return gmtrr_mtype != PAT_TYPE_UC_MINUS ? gmtrr_mtype
+ : MTRR_TYPE_UNCACHABLE;
}
+ if ( gmtrr_mtype == -EADDRNOTAVAIL )
+ return -1;
gmtrr_mtype = is_hvm_domain(d) && v ?
get_mtrr_type(&v->arch.hvm_vcpu.mtrr,
--- a/xen/arch/x86/mm/shadow/multi.c
+++ b/xen/arch/x86/mm/shadow/multi.c
@@ -607,7 +607,7 @@ _sh_propagate(struct vcpu *v,
if ( (level == 1) && is_hvm_domain(d) &&
!is_xen_heap_mfn(mfn_x(target_mfn)) )
{
- unsigned int type;
+ int type;
ASSERT(!(sflags & (_PAGE_PAT | _PAGE_PCD | _PAGE_PWT)));
@@ -619,7 +619,8 @@ _sh_propagate(struct vcpu *v,
* gMTRR and gPAT.
*/
if ( !mmio_mfn &&
- hvm_get_mem_pinned_cacheattr(d, gfn_x(target_gfn), 0, &type) )
+ (type = hvm_get_mem_pinned_cacheattr(d, gfn_x(target_gfn),
+ 0)) >= 0 )
sflags |= pat_type_2_pte_flags(type);
else if ( d->arch.hvm_domain.is_in_uc_mode )
sflags |= pat_type_2_pte_flags(PAT_TYPE_UNCACHABLE);
--- a/xen/include/asm-x86/hvm/cacheattr.h
+++ b/xen/include/asm-x86/hvm/cacheattr.h
@@ -15,8 +15,7 @@ void hvm_destroy_cacheattr_region_list(
int hvm_get_mem_pinned_cacheattr(
struct domain *d,
uint64_t guest_fn,
- unsigned int order,
- uint32_t *type);
+ unsigned int order);
/* Set pinned caching type for a domain. */
[-- Attachment #3: Type: text/plain, Size: 126 bytes --]
_______________________________________________
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Xen-devel@lists.xen.org
http://lists.xen.org/xen-devel
^ permalink raw reply [flat|nested] 16+ messages in thread* Re: [PATCH 2/6] x86/HVM: remove unnecessary indirection from hvm_get_mem_pinned_cacheattr()
2016-03-03 16:36 ` [PATCH 2/6] x86/HVM: remove unnecessary indirection from hvm_get_mem_pinned_cacheattr() Jan Beulich
@ 2016-03-03 16:59 ` Wei Liu
2016-03-03 17:07 ` Wei Liu
2016-03-03 17:35 ` Andrew Cooper
1 sibling, 1 reply; 16+ messages in thread
From: Wei Liu @ 2016-03-03 16:59 UTC (permalink / raw)
To: Jan Beulich; +Cc: xen-devel, Tim Deegan, Keir Fraser, Wei Liu, Andrew Cooper
On Thu, Mar 03, 2016 at 09:36:19AM -0700, Jan Beulich wrote:
[...]
> sflags |= pat_type_2_pte_flags(type);
> else if ( d->arch.hvm_domain.is_in_uc_mode )
> sflags |= pat_type_2_pte_flags(PAT_TYPE_UNCACHABLE);
> --- a/xen/include/asm-x86/hvm/cacheattr.h
> +++ b/xen/include/asm-x86/hvm/cacheattr.h
> @@ -15,8 +15,7 @@ void hvm_destroy_cacheattr_region_list(
> int hvm_get_mem_pinned_cacheattr(
> struct domain *d,
> uint64_t guest_fn,
> - unsigned int order,
> - uint32_t *type);
> + unsigned int order);
>
You seem to have forgotten to update the comment for this function as
you did in previous patch.
Wei.
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Xen-devel@lists.xen.org
http://lists.xen.org/xen-devel
^ permalink raw reply [flat|nested] 16+ messages in thread
* Re: [PATCH 2/6] x86/HVM: remove unnecessary indirection from hvm_get_mem_pinned_cacheattr()
2016-03-03 16:59 ` Wei Liu
@ 2016-03-03 17:07 ` Wei Liu
0 siblings, 0 replies; 16+ messages in thread
From: Wei Liu @ 2016-03-03 17:07 UTC (permalink / raw)
To: Jan Beulich; +Cc: xen-devel, Tim Deegan, Keir Fraser, Wei Liu, Andrew Cooper
On Thu, Mar 03, 2016 at 04:59:22PM +0000, Wei Liu wrote:
> On Thu, Mar 03, 2016 at 09:36:19AM -0700, Jan Beulich wrote:
> [...]
> > sflags |= pat_type_2_pte_flags(type);
> > else if ( d->arch.hvm_domain.is_in_uc_mode )
> > sflags |= pat_type_2_pte_flags(PAT_TYPE_UNCACHABLE);
> > --- a/xen/include/asm-x86/hvm/cacheattr.h
> > +++ b/xen/include/asm-x86/hvm/cacheattr.h
> > @@ -15,8 +15,7 @@ void hvm_destroy_cacheattr_region_list(
> > int hvm_get_mem_pinned_cacheattr(
> > struct domain *d,
> > uint64_t guest_fn,
> > - unsigned int order,
> > - uint32_t *type);
> > + unsigned int order);
> >
>
> You seem to have forgotten to update the comment for this function as
> you did in previous patch.
Oh well, the updated comment went into the final patch of this series.
Wei.
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^ permalink raw reply [flat|nested] 16+ messages in thread
* Re: [PATCH 2/6] x86/HVM: remove unnecessary indirection from hvm_get_mem_pinned_cacheattr()
2016-03-03 16:36 ` [PATCH 2/6] x86/HVM: remove unnecessary indirection from hvm_get_mem_pinned_cacheattr() Jan Beulich
2016-03-03 16:59 ` Wei Liu
@ 2016-03-03 17:35 ` Andrew Cooper
1 sibling, 0 replies; 16+ messages in thread
From: Andrew Cooper @ 2016-03-03 17:35 UTC (permalink / raw)
To: Jan Beulich, xen-devel; +Cc: Keir Fraser, Wei Liu, Tim Deegan
On 03/03/16 16:36, Jan Beulich wrote:
> Its return value can easily serve the purpose. We cannot, however,
> return unspecific "success" anymore for a domain of the wrong type -
> since no caller exists that would call this for PV domains, simply add
> an ASSERT().
>
> Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
_______________________________________________
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http://lists.xen.org/xen-devel
^ permalink raw reply [flat|nested] 16+ messages in thread
* [PATCH 3/6] x86/HVM: adjust hvm_set_mem_pinned_cacheattr() error indications
2016-03-03 16:28 [PATCH 0/6] x86/HVM: cache attribute pinning adjustments Jan Beulich
2016-03-03 16:33 ` [PATCH 1/6] x86/HVM: honor cache attribute pinning for RAM only Jan Beulich
2016-03-03 16:36 ` [PATCH 2/6] x86/HVM: remove unnecessary indirection from hvm_get_mem_pinned_cacheattr() Jan Beulich
@ 2016-03-03 16:37 ` Jan Beulich
2016-03-03 17:37 ` Andrew Cooper
2016-03-03 16:37 ` [PATCH 4/6] x86/HVM: limit flushing on cache attribute pinning adjustments Jan Beulich
` (3 subsequent siblings)
6 siblings, 1 reply; 16+ messages in thread
From: Jan Beulich @ 2016-03-03 16:37 UTC (permalink / raw)
To: xen-devel; +Cc: Andrew Cooper, Keir Fraser, Wei Liu, Tim Deegan
[-- Attachment #1: Type: text/plain, Size: 625 bytes --]
Make it return an error on bad domain kind or obviously bad GFN range.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
--- a/xen/arch/x86/hvm/mtrr.c
+++ b/xen/arch/x86/hvm/mtrr.c
@@ -591,8 +591,11 @@ int32_t hvm_set_mem_pinned_cacheattr(
struct hvm_mem_pinned_cacheattr_range *range;
int rc = 1;
- if ( !is_hvm_domain(d) || gfn_end < gfn_start )
- return 0;
+ if ( !is_hvm_domain(d) )
+ return -EOPNOTSUPP;
+
+ if ( gfn_end < gfn_start || (gfn_start | gfn_end) >> paddr_bits )
+ return -EINVAL;
if ( type == XEN_DOMCTL_DELETE_MEM_CACHEATTR )
{
[-- Attachment #2: x86-HVM-mem-pinned-cacheattr-set.patch --]
[-- Type: text/plain, Size: 687 bytes --]
x86/HVM: adjust hvm_set_mem_pinned_cacheattr() error indications
Make it return an error on bad domain kind or obviously bad GFN range.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
--- a/xen/arch/x86/hvm/mtrr.c
+++ b/xen/arch/x86/hvm/mtrr.c
@@ -591,8 +591,11 @@ int32_t hvm_set_mem_pinned_cacheattr(
struct hvm_mem_pinned_cacheattr_range *range;
int rc = 1;
- if ( !is_hvm_domain(d) || gfn_end < gfn_start )
- return 0;
+ if ( !is_hvm_domain(d) )
+ return -EOPNOTSUPP;
+
+ if ( gfn_end < gfn_start || (gfn_start | gfn_end) >> paddr_bits )
+ return -EINVAL;
if ( type == XEN_DOMCTL_DELETE_MEM_CACHEATTR )
{
[-- Attachment #3: Type: text/plain, Size: 126 bytes --]
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^ permalink raw reply [flat|nested] 16+ messages in thread* [PATCH 4/6] x86/HVM: limit flushing on cache attribute pinning adjustments
2016-03-03 16:28 [PATCH 0/6] x86/HVM: cache attribute pinning adjustments Jan Beulich
` (2 preceding siblings ...)
2016-03-03 16:37 ` [PATCH 3/6] x86/HVM: adjust hvm_set_mem_pinned_cacheattr() error indications Jan Beulich
@ 2016-03-03 16:37 ` Jan Beulich
2016-03-03 17:38 ` Andrew Cooper
2016-03-03 16:38 ` [PATCH 5/6] x86/HVM: adjust hvm_get_mem_pinned_cacheattr() GFN parameter Jan Beulich
` (2 subsequent siblings)
6 siblings, 1 reply; 16+ messages in thread
From: Jan Beulich @ 2016-03-03 16:37 UTC (permalink / raw)
To: xen-devel; +Cc: Andrew Cooper, Keir Fraser, Wei Liu, Tim Deegan
[-- Attachment #1: Type: text/plain, Size: 1340 bytes --]
Avoid cache flush on EPT when removing a UC- range, since when used
this type gets converted to UC anyway (there's no UC- among the types
valid in MTRRs and hence EPT's emt field).
We might further wwant to consider only forcing write buffer flushes
when removing WC ranges.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
--- a/xen/arch/x86/hvm/mtrr.c
+++ b/xen/arch/x86/hvm/mtrr.c
@@ -611,8 +611,21 @@ int32_t hvm_set_mem_pinned_cacheattr(
type = range->type;
call_rcu(&range->rcu, free_pinned_cacheattr_entry);
p2m_memory_type_changed(d);
- if ( type != PAT_TYPE_UNCACHABLE )
+ switch ( type )
+ {
+ case PAT_TYPE_UC_MINUS:
+ /*
+ * For EPT we can also avoid the flush in this case;
+ * see epte_get_entry_emt().
+ */
+ if ( hap_enabled(d) && cpu_has_vmx )
+ case PAT_TYPE_UNCACHABLE:
+ break;
+ /* fall through */
+ default:
flush_all(FLUSH_CACHE);
+ break;
+ }
return 0;
}
rcu_read_unlock(&pinned_cacheattr_rcu_lock);
[-- Attachment #2: x86-HVM-mem-pinned-cacheattr-flush.patch --]
[-- Type: text/plain, Size: 1400 bytes --]
x86/HVM: limit flushing on cache attribute pinning adjustments
Avoid cache flush on EPT when removing a UC- range, since when used
this type gets converted to UC anyway (there's no UC- among the types
valid in MTRRs and hence EPT's emt field).
We might further wwant to consider only forcing write buffer flushes
when removing WC ranges.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
--- a/xen/arch/x86/hvm/mtrr.c
+++ b/xen/arch/x86/hvm/mtrr.c
@@ -611,8 +611,21 @@ int32_t hvm_set_mem_pinned_cacheattr(
type = range->type;
call_rcu(&range->rcu, free_pinned_cacheattr_entry);
p2m_memory_type_changed(d);
- if ( type != PAT_TYPE_UNCACHABLE )
+ switch ( type )
+ {
+ case PAT_TYPE_UC_MINUS:
+ /*
+ * For EPT we can also avoid the flush in this case;
+ * see epte_get_entry_emt().
+ */
+ if ( hap_enabled(d) && cpu_has_vmx )
+ case PAT_TYPE_UNCACHABLE:
+ break;
+ /* fall through */
+ default:
flush_all(FLUSH_CACHE);
+ break;
+ }
return 0;
}
rcu_read_unlock(&pinned_cacheattr_rcu_lock);
[-- Attachment #3: Type: text/plain, Size: 126 bytes --]
_______________________________________________
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^ permalink raw reply [flat|nested] 16+ messages in thread* [PATCH 5/6] x86/HVM: adjust hvm_get_mem_pinned_cacheattr() GFN parameter
2016-03-03 16:28 [PATCH 0/6] x86/HVM: cache attribute pinning adjustments Jan Beulich
` (3 preceding siblings ...)
2016-03-03 16:37 ` [PATCH 4/6] x86/HVM: limit flushing on cache attribute pinning adjustments Jan Beulich
@ 2016-03-03 16:38 ` Jan Beulich
2016-03-03 17:39 ` Andrew Cooper
2016-03-03 16:38 ` [PATCH 6/6] x86/HVM: re-format cache attribute pinning code Jan Beulich
2016-03-04 10:36 ` [PATCH 0/6] x86/HVM: cache attribute pinning adjustments Tim Deegan
6 siblings, 1 reply; 16+ messages in thread
From: Jan Beulich @ 2016-03-03 16:38 UTC (permalink / raw)
To: xen-devel; +Cc: Andrew Cooper, Keir Fraser, Wei Liu, Tim Deegan
[-- Attachment #1: Type: text/plain, Size: 2870 bytes --]
Make it gfn_t and rename it accordingly.
Suggested-by: Andrew Cooper <andrew.cooper3@citrix.com>
Signed-off-by: Jan Beulich <jbeulich@suse.com>
--- a/xen/arch/x86/hvm/mtrr.c
+++ b/xen/arch/x86/hvm/mtrr.c
@@ -545,7 +545,7 @@ void hvm_destroy_cacheattr_region_list(
int hvm_get_mem_pinned_cacheattr(
struct domain *d,
- uint64_t guest_fn,
+ gfn_t gfn,
unsigned int order)
{
struct hvm_mem_pinned_cacheattr_range *range;
@@ -559,14 +559,14 @@ int hvm_get_mem_pinned_cacheattr(
&d->arch.hvm_domain.pinned_cacheattr_ranges,
list )
{
- if ( ((guest_fn & mask) >= range->start) &&
- ((guest_fn | ~mask) <= range->end) )
+ if ( ((gfn_x(gfn) & mask) >= range->start) &&
+ ((gfn_x(gfn) | ~mask) <= range->end) )
{
rc = range->type;
break;
}
- if ( ((guest_fn & mask) <= range->end) &&
- (range->start <= (guest_fn | ~mask)) )
+ if ( ((gfn_x(gfn) & mask) <= range->end) &&
+ ((gfn_x(gfn) | ~mask) >= range->start) )
{
rc = -EADDRNOTAVAIL;
break;
@@ -808,7 +808,7 @@ int epte_get_entry_emt(struct domain *d,
return MTRR_TYPE_WRBACK;
}
- gmtrr_mtype = hvm_get_mem_pinned_cacheattr(d, gfn, order);
+ gmtrr_mtype = hvm_get_mem_pinned_cacheattr(d, _gfn(gfn), order);
if ( gmtrr_mtype >= 0 )
{
*ipat = 1;
--- a/xen/arch/x86/mm/shadow/multi.c
+++ b/xen/arch/x86/mm/shadow/multi.c
@@ -619,8 +619,7 @@ _sh_propagate(struct vcpu *v,
* gMTRR and gPAT.
*/
if ( !mmio_mfn &&
- (type = hvm_get_mem_pinned_cacheattr(d, gfn_x(target_gfn),
- 0)) >= 0 )
+ (type = hvm_get_mem_pinned_cacheattr(d, target_gfn, 0)) >= 0 )
sflags |= pat_type_2_pte_flags(type);
else if ( d->arch.hvm_domain.is_in_uc_mode )
sflags |= pat_type_2_pte_flags(PAT_TYPE_UNCACHABLE);
--- a/xen/include/asm-x86/hvm/cacheattr.h
+++ b/xen/include/asm-x86/hvm/cacheattr.h
@@ -1,20 +1,22 @@
#ifndef __HVM_CACHEATTR_H__
#define __HVM_CACHEATTR_H__
+#include <xen/mm.h>
+
void hvm_init_cacheattr_region_list(
struct domain *d);
void hvm_destroy_cacheattr_region_list(
struct domain *d);
/*
- * To see guest_fn is in the pinned range or not,
+ * Check whether gfn is in the pinned range:
* if yes, return 1, and set type to value in this range
* if no, return 0, setting type to ~0
* if ambiguous, return -1, setting type to ~0 (possible only for order > 0)
*/
int hvm_get_mem_pinned_cacheattr(
struct domain *d,
- uint64_t guest_fn,
+ gfn_t gfn,
unsigned int order);
[-- Attachment #2: x86-HVM-mem-pinned-cacheattr-gfn.patch --]
[-- Type: text/plain, Size: 2928 bytes --]
x86/HVM: adjust hvm_get_mem_pinned_cacheattr() GFN parameter
Make it gfn_t and rename it accordingly.
Suggested-by: Andrew Cooper <andrew.cooper3@citrix.com>
Signed-off-by: Jan Beulich <jbeulich@suse.com>
--- a/xen/arch/x86/hvm/mtrr.c
+++ b/xen/arch/x86/hvm/mtrr.c
@@ -545,7 +545,7 @@ void hvm_destroy_cacheattr_region_list(
int hvm_get_mem_pinned_cacheattr(
struct domain *d,
- uint64_t guest_fn,
+ gfn_t gfn,
unsigned int order)
{
struct hvm_mem_pinned_cacheattr_range *range;
@@ -559,14 +559,14 @@ int hvm_get_mem_pinned_cacheattr(
&d->arch.hvm_domain.pinned_cacheattr_ranges,
list )
{
- if ( ((guest_fn & mask) >= range->start) &&
- ((guest_fn | ~mask) <= range->end) )
+ if ( ((gfn_x(gfn) & mask) >= range->start) &&
+ ((gfn_x(gfn) | ~mask) <= range->end) )
{
rc = range->type;
break;
}
- if ( ((guest_fn & mask) <= range->end) &&
- (range->start <= (guest_fn | ~mask)) )
+ if ( ((gfn_x(gfn) & mask) <= range->end) &&
+ ((gfn_x(gfn) | ~mask) >= range->start) )
{
rc = -EADDRNOTAVAIL;
break;
@@ -808,7 +808,7 @@ int epte_get_entry_emt(struct domain *d,
return MTRR_TYPE_WRBACK;
}
- gmtrr_mtype = hvm_get_mem_pinned_cacheattr(d, gfn, order);
+ gmtrr_mtype = hvm_get_mem_pinned_cacheattr(d, _gfn(gfn), order);
if ( gmtrr_mtype >= 0 )
{
*ipat = 1;
--- a/xen/arch/x86/mm/shadow/multi.c
+++ b/xen/arch/x86/mm/shadow/multi.c
@@ -619,8 +619,7 @@ _sh_propagate(struct vcpu *v,
* gMTRR and gPAT.
*/
if ( !mmio_mfn &&
- (type = hvm_get_mem_pinned_cacheattr(d, gfn_x(target_gfn),
- 0)) >= 0 )
+ (type = hvm_get_mem_pinned_cacheattr(d, target_gfn, 0)) >= 0 )
sflags |= pat_type_2_pte_flags(type);
else if ( d->arch.hvm_domain.is_in_uc_mode )
sflags |= pat_type_2_pte_flags(PAT_TYPE_UNCACHABLE);
--- a/xen/include/asm-x86/hvm/cacheattr.h
+++ b/xen/include/asm-x86/hvm/cacheattr.h
@@ -1,20 +1,22 @@
#ifndef __HVM_CACHEATTR_H__
#define __HVM_CACHEATTR_H__
+#include <xen/mm.h>
+
void hvm_init_cacheattr_region_list(
struct domain *d);
void hvm_destroy_cacheattr_region_list(
struct domain *d);
/*
- * To see guest_fn is in the pinned range or not,
+ * Check whether gfn is in the pinned range:
* if yes, return 1, and set type to value in this range
* if no, return 0, setting type to ~0
* if ambiguous, return -1, setting type to ~0 (possible only for order > 0)
*/
int hvm_get_mem_pinned_cacheattr(
struct domain *d,
- uint64_t guest_fn,
+ gfn_t gfn,
unsigned int order);
[-- Attachment #3: Type: text/plain, Size: 126 bytes --]
_______________________________________________
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http://lists.xen.org/xen-devel
^ permalink raw reply [flat|nested] 16+ messages in thread* [PATCH 6/6] x86/HVM: re-format cache attribute pinning code
2016-03-03 16:28 [PATCH 0/6] x86/HVM: cache attribute pinning adjustments Jan Beulich
` (4 preceding siblings ...)
2016-03-03 16:38 ` [PATCH 5/6] x86/HVM: adjust hvm_get_mem_pinned_cacheattr() GFN parameter Jan Beulich
@ 2016-03-03 16:38 ` Jan Beulich
2016-03-03 17:40 ` Andrew Cooper
2016-03-04 10:36 ` [PATCH 0/6] x86/HVM: cache attribute pinning adjustments Tim Deegan
6 siblings, 1 reply; 16+ messages in thread
From: Jan Beulich @ 2016-03-03 16:38 UTC (permalink / raw)
To: xen-devel; +Cc: Andrew Cooper, Keir Fraser, Wei Liu, Tim Deegan
[-- Attachment #1: Type: text/plain, Size: 4242 bytes --]
No intended functional change, albeit it includes ditching a redundant
is_hvm_domain().
Signed-off-by: Jan Beulich <jbeulich@suse.com>
--- a/xen/arch/x86/hvm/mtrr.c
+++ b/xen/arch/x86/hvm/mtrr.c
@@ -521,14 +521,12 @@ struct hvm_mem_pinned_cacheattr_range {
static DEFINE_RCU_READ_LOCK(pinned_cacheattr_rcu_lock);
-void hvm_init_cacheattr_region_list(
- struct domain *d)
+void hvm_init_cacheattr_region_list(struct domain *d)
{
INIT_LIST_HEAD(&d->arch.hvm_domain.pinned_cacheattr_ranges);
}
-void hvm_destroy_cacheattr_region_list(
- struct domain *d)
+void hvm_destroy_cacheattr_region_list(struct domain *d)
{
struct list_head *head = &d->arch.hvm_domain.pinned_cacheattr_ranges;
struct hvm_mem_pinned_cacheattr_range *range;
@@ -543,10 +541,8 @@ void hvm_destroy_cacheattr_region_list(
}
}
-int hvm_get_mem_pinned_cacheattr(
- struct domain *d,
- gfn_t gfn,
- unsigned int order)
+int hvm_get_mem_pinned_cacheattr(struct domain *d, gfn_t gfn,
+ unsigned int order)
{
struct hvm_mem_pinned_cacheattr_range *range;
uint64_t mask = ~(uint64_t)0 << order;
@@ -582,11 +578,8 @@ static void free_pinned_cacheattr_entry(
xfree(container_of(rcu, struct hvm_mem_pinned_cacheattr_range, rcu));
}
-int32_t hvm_set_mem_pinned_cacheattr(
- struct domain *d,
- uint64_t gfn_start,
- uint64_t gfn_end,
- uint32_t type)
+int hvm_set_mem_pinned_cacheattr(struct domain *d, uint64_t gfn_start,
+ uint64_t gfn_end, uint32_t type)
{
struct hvm_mem_pinned_cacheattr_range *range;
int rc = 1;
@@ -597,8 +590,9 @@ int32_t hvm_set_mem_pinned_cacheattr(
if ( gfn_end < gfn_start || (gfn_start | gfn_end) >> paddr_bits )
return -EINVAL;
- if ( type == XEN_DOMCTL_DELETE_MEM_CACHEATTR )
+ switch ( type )
{
+ case XEN_DOMCTL_DELETE_MEM_CACHEATTR:
/* Remove the requested range. */
rcu_read_lock(&pinned_cacheattr_rcu_lock);
list_for_each_entry_rcu ( range,
@@ -630,16 +624,18 @@ int32_t hvm_set_mem_pinned_cacheattr(
}
rcu_read_unlock(&pinned_cacheattr_rcu_lock);
return -ENOENT;
- }
- if ( !((type == PAT_TYPE_UNCACHABLE) ||
- (type == PAT_TYPE_WRCOMB) ||
- (type == PAT_TYPE_WRTHROUGH) ||
- (type == PAT_TYPE_WRPROT) ||
- (type == PAT_TYPE_WRBACK) ||
- (type == PAT_TYPE_UC_MINUS)) ||
- !is_hvm_domain(d) )
+ case PAT_TYPE_UC_MINUS:
+ case PAT_TYPE_UNCACHABLE:
+ case PAT_TYPE_WRBACK:
+ case PAT_TYPE_WRCOMB:
+ case PAT_TYPE_WRPROT:
+ case PAT_TYPE_WRTHROUGH:
+ break;
+
+ default:
return -EINVAL;
+ }
rcu_read_lock(&pinned_cacheattr_rcu_lock);
list_for_each_entry_rcu ( range,
--- a/xen/include/asm-x86/hvm/cacheattr.h
+++ b/xen/include/asm-x86/hvm/cacheattr.h
@@ -3,28 +3,21 @@
#include <xen/mm.h>
-void hvm_init_cacheattr_region_list(
- struct domain *d);
-void hvm_destroy_cacheattr_region_list(
- struct domain *d);
+struct domain;
+void hvm_init_cacheattr_region_list(struct domain *d);
+void hvm_destroy_cacheattr_region_list(struct domain *d);
/*
* Check whether gfn is in the pinned range:
- * if yes, return 1, and set type to value in this range
- * if no, return 0, setting type to ~0
- * if ambiguous, return -1, setting type to ~0 (possible only for order > 0)
+ * if yes, return the (non-negative) type
+ * if no or ambiguous, return a negative error code
*/
-int hvm_get_mem_pinned_cacheattr(
- struct domain *d,
- gfn_t gfn,
- unsigned int order);
+int hvm_get_mem_pinned_cacheattr(struct domain *d, gfn_t gfn,
+ unsigned int order);
/* Set pinned caching type for a domain. */
-int32_t hvm_set_mem_pinned_cacheattr(
- struct domain *d,
- uint64_t gfn_start,
- uint64_t gfn_end,
- uint32_t type);
+int hvm_set_mem_pinned_cacheattr(struct domain *d, uint64_t gfn_start,
+ uint64_t gfn_end, uint32_t type);
#endif /* __HVM_CACHEATTR_H__ */
[-- Attachment #2: x86-HVM-mem-pinned-cacheattr-formatting.patch --]
[-- Type: text/plain, Size: 4289 bytes --]
x86/HVM: re-format cache attribute pinning code
No intended functional change, albeit it includes ditching a redundant
is_hvm_domain().
Signed-off-by: Jan Beulich <jbeulich@suse.com>
--- a/xen/arch/x86/hvm/mtrr.c
+++ b/xen/arch/x86/hvm/mtrr.c
@@ -521,14 +521,12 @@ struct hvm_mem_pinned_cacheattr_range {
static DEFINE_RCU_READ_LOCK(pinned_cacheattr_rcu_lock);
-void hvm_init_cacheattr_region_list(
- struct domain *d)
+void hvm_init_cacheattr_region_list(struct domain *d)
{
INIT_LIST_HEAD(&d->arch.hvm_domain.pinned_cacheattr_ranges);
}
-void hvm_destroy_cacheattr_region_list(
- struct domain *d)
+void hvm_destroy_cacheattr_region_list(struct domain *d)
{
struct list_head *head = &d->arch.hvm_domain.pinned_cacheattr_ranges;
struct hvm_mem_pinned_cacheattr_range *range;
@@ -543,10 +541,8 @@ void hvm_destroy_cacheattr_region_list(
}
}
-int hvm_get_mem_pinned_cacheattr(
- struct domain *d,
- gfn_t gfn,
- unsigned int order)
+int hvm_get_mem_pinned_cacheattr(struct domain *d, gfn_t gfn,
+ unsigned int order)
{
struct hvm_mem_pinned_cacheattr_range *range;
uint64_t mask = ~(uint64_t)0 << order;
@@ -582,11 +578,8 @@ static void free_pinned_cacheattr_entry(
xfree(container_of(rcu, struct hvm_mem_pinned_cacheattr_range, rcu));
}
-int32_t hvm_set_mem_pinned_cacheattr(
- struct domain *d,
- uint64_t gfn_start,
- uint64_t gfn_end,
- uint32_t type)
+int hvm_set_mem_pinned_cacheattr(struct domain *d, uint64_t gfn_start,
+ uint64_t gfn_end, uint32_t type)
{
struct hvm_mem_pinned_cacheattr_range *range;
int rc = 1;
@@ -597,8 +590,9 @@ int32_t hvm_set_mem_pinned_cacheattr(
if ( gfn_end < gfn_start || (gfn_start | gfn_end) >> paddr_bits )
return -EINVAL;
- if ( type == XEN_DOMCTL_DELETE_MEM_CACHEATTR )
+ switch ( type )
{
+ case XEN_DOMCTL_DELETE_MEM_CACHEATTR:
/* Remove the requested range. */
rcu_read_lock(&pinned_cacheattr_rcu_lock);
list_for_each_entry_rcu ( range,
@@ -630,16 +624,18 @@ int32_t hvm_set_mem_pinned_cacheattr(
}
rcu_read_unlock(&pinned_cacheattr_rcu_lock);
return -ENOENT;
- }
- if ( !((type == PAT_TYPE_UNCACHABLE) ||
- (type == PAT_TYPE_WRCOMB) ||
- (type == PAT_TYPE_WRTHROUGH) ||
- (type == PAT_TYPE_WRPROT) ||
- (type == PAT_TYPE_WRBACK) ||
- (type == PAT_TYPE_UC_MINUS)) ||
- !is_hvm_domain(d) )
+ case PAT_TYPE_UC_MINUS:
+ case PAT_TYPE_UNCACHABLE:
+ case PAT_TYPE_WRBACK:
+ case PAT_TYPE_WRCOMB:
+ case PAT_TYPE_WRPROT:
+ case PAT_TYPE_WRTHROUGH:
+ break;
+
+ default:
return -EINVAL;
+ }
rcu_read_lock(&pinned_cacheattr_rcu_lock);
list_for_each_entry_rcu ( range,
--- a/xen/include/asm-x86/hvm/cacheattr.h
+++ b/xen/include/asm-x86/hvm/cacheattr.h
@@ -3,28 +3,21 @@
#include <xen/mm.h>
-void hvm_init_cacheattr_region_list(
- struct domain *d);
-void hvm_destroy_cacheattr_region_list(
- struct domain *d);
+struct domain;
+void hvm_init_cacheattr_region_list(struct domain *d);
+void hvm_destroy_cacheattr_region_list(struct domain *d);
/*
* Check whether gfn is in the pinned range:
- * if yes, return 1, and set type to value in this range
- * if no, return 0, setting type to ~0
- * if ambiguous, return -1, setting type to ~0 (possible only for order > 0)
+ * if yes, return the (non-negative) type
+ * if no or ambiguous, return a negative error code
*/
-int hvm_get_mem_pinned_cacheattr(
- struct domain *d,
- gfn_t gfn,
- unsigned int order);
+int hvm_get_mem_pinned_cacheattr(struct domain *d, gfn_t gfn,
+ unsigned int order);
/* Set pinned caching type for a domain. */
-int32_t hvm_set_mem_pinned_cacheattr(
- struct domain *d,
- uint64_t gfn_start,
- uint64_t gfn_end,
- uint32_t type);
+int hvm_set_mem_pinned_cacheattr(struct domain *d, uint64_t gfn_start,
+ uint64_t gfn_end, uint32_t type);
#endif /* __HVM_CACHEATTR_H__ */
[-- Attachment #3: Type: text/plain, Size: 126 bytes --]
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^ permalink raw reply [flat|nested] 16+ messages in thread* Re: [PATCH 0/6] x86/HVM: cache attribute pinning adjustments
2016-03-03 16:28 [PATCH 0/6] x86/HVM: cache attribute pinning adjustments Jan Beulich
` (5 preceding siblings ...)
2016-03-03 16:38 ` [PATCH 6/6] x86/HVM: re-format cache attribute pinning code Jan Beulich
@ 2016-03-04 10:36 ` Tim Deegan
6 siblings, 0 replies; 16+ messages in thread
From: Tim Deegan @ 2016-03-04 10:36 UTC (permalink / raw)
To: Jan Beulich; +Cc: xen-devel, Keir Fraser, Wei Liu, Andrew Cooper
At 09:28 -0700 on 03 Mar (1456997339), Jan Beulich wrote:
> 1: honor cache attribute pinning for RAM only
> 2: remove unnecessary indirection from hvm_get_mem_pinned_cacheattr()
> 3: adjust hvm_set_mem_pinned_cacheattr() error indications
> 4: limit flushing on cache attribute pinning adjustments
> 5: adjust hvm_get_mem_pinned_cacheattr() GFN parameter
> 6: re-format cache attribute pinning code
>
> Signed-off-by: Jan Beulich <jbeulich@suse.com>
All the shadow-pagetable bits:
Acked-by: Tim Deegan <tim@xen.org>
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^ permalink raw reply [flat|nested] 16+ messages in thread