On Fri, 15 Mar 2019, Paolo Bonzini wrote:
On 22/02/19 11:48, lantianyu1986@gmail.com wrote:
From: Lan Tianyu Tianyu.Lan@microsoft.com
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@vger.kernel.org Fixs: cc4edae4b9(x86/hyper-v: Add HvFlushGuestAddressList hypercall support) Signed-off-by: Lan Tianyu Tianyu.Lan@microsoft.com
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