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

[patchbot@xxxxxxx]

commit a689b121993a48646d154e0b6c43d868b805f9a5
Author:     Artem Bityutskiy <artem.bityutskiy@xxxxxxxxxxxxxxx>
AuthorDate: Wed Jul 9 11:00:44 2025 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Wed Jul 9 11:00:44 2025 +0200

    x86/mwait-idle: add Emerald Rapids Xeon support
    
    Emerald Rapids (EMR) is the next Intel Xeon processor after Sapphire
    Rapids (SPR).
    
    EMR C-states are the same as SPR C-states, and we expect that EMR
    C-state characteristics (latency and target residency) will be the
    same as in SPR. Therefore, add EMR support by using SPR C-states table.
    
    Signed-off-by: Artem Bityutskiy <artem.bityutskiy@xxxxxxxxxxxxxxx>
    Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
    Origin: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 
74528edfbc66
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
 xen/arch/x86/cpu/mwait-idle.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/xen/arch/x86/cpu/mwait-idle.c b/xen/arch/x86/cpu/mwait-idle.c
index 52cdf8ba12..611ae512f1 100644
--- a/xen/arch/x86/cpu/mwait-idle.c
+++ b/xen/arch/x86/cpu/mwait-idle.c
@@ -1188,6 +1188,7 @@ static const struct x86_cpu_id intel_idle_ids[] 
__initconstrel = {
        ICPU(ALDERLAKE_L,               adl_l),
        ICPU(ATOM_GRACEMONT,            gmt),
        ICPU(SAPPHIRERAPIDS_X,          spr),
+       ICPU(EMERALDRAPIDS_X,           spr),
        ICPU(ATOM_GOLDMONT,             bxt),
        ICPU(ATOM_GOLDMONT_PLUS,        bxt),
        ICPU(ATOM_GOLDMONT_D,           dnv),
@@ -1421,6 +1422,7 @@ static void __init mwait_idle_state_table_update(void)
                skx_idle_state_table_update();
                break;
        case INTEL_FAM6_SAPPHIRERAPIDS_X:
+       case INTEL_FAM6_EMERALDRAPIDS_X:
                spr_idle_state_table_update();
                break;
        case INTEL_FAM6_ALDERLAKE:
--
generated by git-patchbot for /home/xen/git/xen.git#staging