On Fri, 15 Mar 2019, Paolo Bonzini wrote:
> On 22/02/19 11:48, lantianyu1986@xxxxxxxxx wrote:
> > From: Lan Tianyu <Tianyu.Lan@xxxxxxxxxxxxx>
> >
> > The max flush rep count of HvFlushGuestPhysicalAddressList hypercall
> > is equal with how many entries of union hv_gpa_page_range can be populated
> > into the input parameter page. The origin code lacks parenthesis around
> > PAGE_SIZE - 2 * sizeof(u64). This patch is to fix it.
> >
> > Cc: <stable@xxxxxxxxxxxxxxx>
> > Fixs: cc4edae4b9(x86/hyper-v: Add HvFlushGuestAddressList hypercall support)
> > Signed-off-by: Lan Tianyu <Tianyu.Lan@xxxxxxxxxxxxx>
> > ---
> > arch/x86/include/asm/hyperv-tlfs.h | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/arch/x86/include/asm/hyperv-tlfs.h b/arch/x86/include/asm/hyperv-tlfs.h
> > index 705dafc2d11a..2bdbbbcfa393 100644
> > --- a/arch/x86/include/asm/hyperv-tlfs.h
> > +++ b/arch/x86/include/asm/hyperv-tlfs.h
> > @@ -841,7 +841,7 @@ union hv_gpa_page_range {
> > * count is equal with how many entries of union hv_gpa_page_range can
> > * be populated into the input parameter page.
> > */
> > -#define HV_MAX_FLUSH_REP_COUNT (PAGE_SIZE - 2 * sizeof(u64) / \
> > +#define HV_MAX_FLUSH_REP_COUNT ((PAGE_SIZE - 2 * sizeof(u64)) / \
> > sizeof(union hv_gpa_page_range))
> >
> > struct hv_guest_mapping_flush_list {
> >
>
> Queued for after he merge window, with the fixed "Fixes" tag.
That's upstream already:
9cd05ad2910b ("x86/hyper-v: Fix definition of HV_MAX_FLUSH_REP_COUNT")
Thanks,
tglx
