[xen staging] x86/mwait-idle: add Granite Rapids Xeon D support

[patchbot@xxxxxxx]

commit 24d76e388bd7adac5f2616ddaf8b2eced00d549b
Author:     Artem Bityutskiy <artem.bityutskiy@xxxxxxxxxxxxxxx>
AuthorDate: Wed Jul 9 11:02:24 2025 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Wed Jul 9 11:02:24 2025 +0200

    x86/mwait-idle: add Granite Rapids Xeon D support
    
    Add Granite Rapids Xeon D C-states support: C1, C1E, C6, and C6P.
    
    The C-states are basically the same as in Granite Rapids Xeon SP/AP, but
    characteristics (latency, target residency) are a bit different.
    
    Signed-off-by: Artem Bityutskiy <artem.bityutskiy@xxxxxxxxxxxxxxx>
    Link: 
https://patch.msgid.link/20241107115608.52233-1-artem.bityutskiy@xxxxxxxxxxxxxxx
    [ rjw: Changelog edit ]
    Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
    Origin: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 
f557e0d1c2e6
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
 xen/arch/x86/cpu/mwait-idle.c | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/xen/arch/x86/cpu/mwait-idle.c b/xen/arch/x86/cpu/mwait-idle.c
index 4c16c0bf15..e36bab7b82 100644
--- a/xen/arch/x86/cpu/mwait-idle.c
+++ b/xen/arch/x86/cpu/mwait-idle.c
@@ -784,6 +784,34 @@ static const struct cpuidle_state gnr_cstates[] = {
        {}
 };
 
+static const struct cpuidle_state gnrd_cstates[] = {
+       {
+               .name = "C1",
+               .flags = MWAIT2flg(0x00),
+               .exit_latency = 1,
+               .target_residency = 1,
+       },
+       {
+               .name = "C1E",
+               .flags = MWAIT2flg(0x01),
+               .exit_latency = 4,
+               .target_residency = 4,
+       },
+       {
+               .name = "C6",
+               .flags = MWAIT2flg(0x20) | CPUIDLE_FLAG_TLB_FLUSHED,
+               .exit_latency = 220,
+               .target_residency = 650,
+       },
+       {
+               .name = "C6P",
+               .flags = MWAIT2flg(0x21) | CPUIDLE_FLAG_TLB_FLUSHED,
+               .exit_latency = 240,
+               .target_residency = 750,
+       },
+       {}
+};
+
 static const struct cpuidle_state atom_cstates[] = {
        {
                .name = "C1E",
@@ -1235,6 +1263,11 @@ static const struct idle_cpu idle_cpu_gnr = {
        .c1e_promotion = C1E_PROMOTION_DISABLE,
 };
 
+static const struct idle_cpu idle_cpu_gnrd = {
+       .state_table = gnrd_cstates,
+       .c1e_promotion = C1E_PROMOTION_DISABLE,
+};
+
 static const struct idle_cpu idle_cpu_avn = {
        .state_table = avn_cstates,
        .c1e_promotion = C1E_PROMOTION_DISABLE,
@@ -1310,6 +1343,7 @@ static const struct x86_cpu_id intel_idle_ids[] 
__initconstrel = {
        ICPU(SAPPHIRERAPIDS_X,          spr),
        ICPU(EMERALDRAPIDS_X,           spr),
        ICPU(GRANITERAPIDS_X,           gnr),
+       ICPU(GRANITERAPIDS_D,           gnrd),
        ICPU(ATOM_GOLDMONT,             bxt),
        ICPU(ATOM_GOLDMONT_PLUS,        bxt),
        ICPU(ATOM_GOLDMONT_D,           dnv),
--
generated by git-patchbot for /home/xen/git/xen.git#staging