Hi all,
this patch allows guests that have directly mapped MMIO regions to set
the caching attributes for them, and only for them.
Currently we have just an on\off check for a directly assigned device
instead of looking for directly mapped MMIO regions.
Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
---
diff -r 28e5409e3fb3 xen/arch/x86/hvm/hvm.c
--- a/xen/arch/x86/hvm/hvm.c Wed Apr 07 16:22:05 2010 +0100
+++ b/xen/arch/x86/hvm/hvm.c Wed Apr 07 17:33:15 2010 +0100
@@ -1126,7 +1126,7 @@
}
}
- if ( has_arch_pdevs(v->domain) )
+ if ( has_arch_mmios(v->domain) )
{
if ( (value & X86_CR0_CD) && !(value & X86_CR0_NW) )
{
diff -r 28e5409e3fb3 xen/arch/x86/hvm/svm/svm.c
--- a/xen/arch/x86/hvm/svm/svm.c Wed Apr 07 16:22:05 2010 +0100
+++ b/xen/arch/x86/hvm/svm/svm.c Wed Apr 07 17:33:15 2010 +0100
@@ -1228,7 +1228,7 @@
static void svm_wbinvd_intercept(void)
{
- if ( has_arch_pdevs(current->domain) )
+ if ( has_arch_mmios(current->domain) )
on_each_cpu(wbinvd_ipi, NULL, 1);
}
diff -r 28e5409e3fb3 xen/arch/x86/hvm/vmx/vmx.c
--- a/xen/arch/x86/hvm/vmx/vmx.c Wed Apr 07 16:22:05 2010 +0100
+++ b/xen/arch/x86/hvm/vmx/vmx.c Wed Apr 07 17:33:15 2010 +0100
@@ -2109,7 +2109,7 @@
static void vmx_wbinvd_intercept(void)
{
- if ( !has_arch_pdevs(current->domain) )
+ if ( !has_arch_mmios(current->domain) )
return;
if ( cpu_has_wbinvd_exiting )
diff -r 28e5409e3fb3 xen/arch/x86/mm/shadow/multi.c
--- a/xen/arch/x86/mm/shadow/multi.c Wed Apr 07 16:22:05 2010 +0100
+++ b/xen/arch/x86/mm/shadow/multi.c Wed Apr 07 17:33:15 2010 +0100
@@ -28,6 +28,7 @@
#include <xen/sched.h>
#include <xen/perfc.h>
#include <xen/domain_page.h>
+#include <xen/iocap.h>
#include <asm/page.h>
#include <asm/current.h>
#include <asm/shadow.h>
@@ -546,7 +547,8 @@
* For HVM domains with direct access to MMIO areas, set the correct
* caching attributes in the shadows to match what was asked for.
*/
- if ( (level == 1) && is_hvm_domain(d) && has_arch_pdevs(d) &&
+ if ( (level == 1) && is_hvm_domain(d) &&
+ iomem_access_permitted(d, mfn_x(target_mfn), mfn_x(target_mfn) + 1) &&
!is_xen_heap_mfn(mfn_x(target_mfn)) )
{
unsigned int type;
diff -r 28e5409e3fb3 xen/include/asm-ia64/domain.h
--- a/xen/include/asm-ia64/domain.h Wed Apr 07 16:22:05 2010 +0100
+++ b/xen/include/asm-ia64/domain.h Wed Apr 07 17:33:15 2010 +0100
@@ -45,6 +45,7 @@
__attribute__ ((noreturn, format (printf, 2, 3)));
#define has_arch_pdevs(d) (!list_empty(&(d)->arch.pdev_list))
+#define has_arch_mmios(d) (!rangeset_is_empty((d)->iomem_caps))
struct mm_struct {
volatile pgd_t * pgd;
diff -r 28e5409e3fb3 xen/include/asm-x86/domain.h
--- a/xen/include/asm-x86/domain.h Wed Apr 07 16:22:05 2010 +0100
+++ b/xen/include/asm-x86/domain.h Wed Apr 07 17:33:15 2010 +0100
@@ -329,6 +329,7 @@
} __cacheline_aligned;
#define has_arch_pdevs(d) (!list_empty(&(d)->arch.pdev_list))
+#define has_arch_mmios(d) (!rangeset_is_empty((d)->iomem_caps))
#ifdef CONFIG_X86_64
#define perdomain_pt_pgidx(v) \
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