[Xen-devel] [PATCH 1/5] mwait-idle: add SKX support

["Jan Beulich" <JBeulich@xxxxxxxx>]

SKX is similar to BDX

Signed-off-by: Len Brown <len.brown@xxxxxxxxx>
[Linux commit: f9e71657c2c0a8f1c50884ab45794be2854e158e]
Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

--- a/xen/arch/x86/cpu/mwait-idle.c
+++ b/xen/arch/x86/cpu/mwait-idle.c
@@ -530,6 +530,28 @@ static struct cpuidle_state skl_cstates[
        {}
 };
 
+static const struct cpuidle_state skx_cstates[] = {
+       {
+               .name = "C1-SKX",
+               .flags = MWAIT2flg(0x00),
+               .exit_latency = 2,
+               .target_residency = 2,
+       },
+       {
+               .name = "C1E-SKX",
+               .flags = MWAIT2flg(0x01),
+               .exit_latency = 10,
+               .target_residency = 20,
+       },
+       {
+               .name = "C6-SKX",
+               .flags = MWAIT2flg(0x20) | CPUIDLE_FLAG_TLB_FLUSHED,
+               .exit_latency = 133,
+               .target_residency = 600,
+       },
+       {}
+};
+
 static const struct cpuidle_state atom_cstates[] = {
        {
                .name = "C1E-ATM",
@@ -757,6 +779,11 @@ static const struct idle_cpu idle_cpu_sk
        .disable_promotion_to_c1e = 1,
 };
 
+static const struct idle_cpu idle_cpu_skx = {
+       .state_table = skx_cstates,
+       .disable_promotion_to_c1e = 1,
+};
+
 static const struct idle_cpu idle_cpu_avn = {
        .state_table = avn_cstates,
        .disable_promotion_to_c1e = 1,
@@ -798,6 +825,7 @@ static const struct x86_cpu_id intel_idl
        ICPU(0x56, bdw),
        ICPU(0x4e, skl),
        ICPU(0x5e, skl),
+       ICPU(0x55, skx),
        ICPU(0x57, knl),
        {}
 };

Attachment: x86-mwait-idle-SKX.patch
Description: Text document

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