mwait-idle: add CPU model 54 (Atom N2000 series)

Add CPU ID for Atom N2600/N2800 processors. Datasheets indicate support
for this, detailed information about potential quirks or limitations are
missing, though. So we just reuse the definition for the previous ATOM
series. Tests on N2800 systems showed that this addition is fine an can
reduce power consumption by about 0.25 W (personally confirmed on Intel
DN2800MT).

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Jan Beulich <jbeulich@suse.com>

diff --git a/xen/arch/x86/cpu/mwait-idle.c b/xen/arch/x86/cpu/mwait-idle.c
index 06f4a3301a400ff58f8cb2ad3b8a4a60138a3f5f..3a4b970f0d60af57342b7f1c36801f204e69e6ec 100644 (file)
--- a/xen/arch/x86/cpu/mwait-idle.c
+++ b/xen/arch/x86/cpu/mwait-idle.c
@@ -519,6 +519,7 @@ static struct intel_idle_id {
        ICPU(0x26, lincroft),
        ICPU(0x2a, snb),
        ICPU(0x2d, snb),
+       ICPU(0x36, atom),
        ICPU(0x37, byt),
        ICPU(0x3a, ivb),
        ICPU(0x3e, ivb),