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KVM: VMX: Change ple_window type to unsigned int

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The VMX ple_window is 32 bits wide, so logically it can overflow with
an int.  The module parameter is declared as unsigned int which is
good, however the dynamic variable is not.  Switching all the
ple_window references to use unsigned int.

The tracepoint changes will also affect SVM, but SVM is using an even
smaller width (16 bits) so it's always fine.

Suggested-by: Sean Christopherson <sean.j.christopherson@intel.com>
Reviewed-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Peter Xu 2019-09-06 10:17:21 +08:00 committed by Paolo Bonzini
parent 13a7e370cb
commit c5c5d6fae0
3 changed files with 8 additions and 7 deletions
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9
arch/x86/kvm/trace.h
View File

@ -891,14 +891,15 @@ TRACE_EVENT(kvm_pml_full,
);
TRACE_EVENT(kvm_ple_window,
TP_PROTO(bool grow, unsigned int vcpu_id, int new, int old),
TP_PROTO(bool grow, unsigned int vcpu_id, unsigned int new,
unsigned int old),
TP_ARGS(grow, vcpu_id, new, old),
TP_STRUCT__entry(
__field( bool, grow )
__field( unsigned int, vcpu_id )
__field( int, new )
__field( int, old )
__field( unsigned int, new )
__field( unsigned int, old )
),
TP_fast_assign(
@ -908,7 +909,7 @@ TRACE_EVENT(kvm_ple_window,
__entry->old = old;
),
TP_printk("vcpu %u: ple_window %d (%s %d)",
TP_printk("vcpu %u: ple_window %u (%s %u)",
__entry->vcpu_id,
__entry->new,
__entry->grow ? "grow" : "shrink",

4
arch/x86/kvm/vmx/vmx.c
View File

@ -5237,7 +5237,7 @@ emulation_error:
static void grow_ple_window(struct kvm_vcpu *vcpu)
{
struct vcpu_vmx *vmx = to_vmx(vcpu);
int old = vmx->ple_window;
unsigned int old = vmx->ple_window;
vmx->ple_window = __grow_ple_window(old, ple_window,
ple_window_grow,
@ -5252,7 +5252,7 @@ static void grow_ple_window(struct kvm_vcpu *vcpu)
static void shrink_ple_window(struct kvm_vcpu *vcpu)
{
struct vcpu_vmx *vmx = to_vmx(vcpu);
int old = vmx->ple_window;
unsigned int old = vmx->ple_window;
vmx->ple_window = __shrink_ple_window(old, ple_window,
ple_window_shrink,

2
arch/x86/kvm/vmx/vmx.h
View File

@ -253,7 +253,7 @@ struct vcpu_vmx {
struct nested_vmx nested;
/* Dynamic PLE window. */
int ple_window;
unsigned int ple_window;
bool ple_window_dirty;
bool req_immediate_exit;