Re: [PATCH 1/7] drm/i915/mtl: Define MOCS and PAT tables for MTL

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Hi Fei,

On 4/6/2023 4:55 PM, Yang, Fei wrote:
> On 4/1/2023 8:38 AM, fei.yang@xxxxxxxxx wrote:
>> From: Fei Yang <fei.yang@xxxxxxxxx>
>>
>> On MTL, GT can no longer allocate on LLC - only the CPU can.
>> This, along with addition of support for ADM/L4 cache calls a
>> MOCS/PAT table update.
>> Also add PTE encode functions for MTL as it has different PAT
>> index definition than previous platforms.
>>
>> BSpec: 44509, 45101, 44235
>>
>> Cc: Matt Roper <matthew.d.roper@xxxxxxxxx>
>> Cc: Lucas De Marchi <lucas.demarchi@xxxxxxxxx>
>> Signed-off-by: Madhumitha Tolakanahalli Pradeep <madhumitha.tolakanahalli.pradeep@xxxxxxxxx>
>> Signed-off-by: Aravind Iddamsetty <aravind.iddamsetty@xxxxxxxxx>
>> Signed-off-by: Fei Yang <fei.yang@xxxxxxxxx>
>> ---
>>   drivers/gpu/drm/i915/display/intel_dpt.c |  2 +-
>>   drivers/gpu/drm/i915/gt/gen8_ppgtt.c     | 43 ++++++++++++--
>>   drivers/gpu/drm/i915/gt/gen8_ppgtt.h     |  3 +
>>   drivers/gpu/drm/i915/gt/intel_ggtt.c     | 36 ++++++++++-
>>   drivers/gpu/drm/i915/gt/intel_gtt.c      | 23 ++++++-
>>   drivers/gpu/drm/i915/gt/intel_gtt.h      | 20 ++++++-
>>   drivers/gpu/drm/i915/gt/intel_mocs.c     | 76 ++++++++++++++++++++++--
>>   drivers/gpu/drm/i915/gt/selftest_mocs.c  |  2 +-
>>   drivers/gpu/drm/i915/i915_pci.c          |  1 +
>>   9 files changed, 189 insertions(+), 17 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/i915/display/intel_dpt.c b/drivers/gpu/drm/i915/display/intel_dpt.c
>> index b8027392144d..c5eacfdba1a5 100644
>> --- a/drivers/gpu/drm/i915/display/intel_dpt.c
>> +++ b/drivers/gpu/drm/i915/display/intel_dpt.c
>> @@ -300,7 +300,7 @@ intel_dpt_create(struct intel_framebuffer *fb)
>>        vm->vma_ops.bind_vma    = dpt_bind_vma;
>>        vm->vma_ops.unbind_vma  = dpt_unbind_vma;
>>  
>> -     vm->pte_encode = gen8_ggtt_pte_encode;
>> +     vm->pte_encode = vm->gt->ggtt->vm.pte_encode;
>>  
>>        dpt->obj = dpt_obj;
>>        dpt->obj->is_dpt = true;
>> diff --git a/drivers/gpu/drm/i915/gt/gen8_ppgtt.c b/drivers/gpu/drm/i915/gt/gen8_ppgtt.c
>> index 4daaa6f55668..4197b43150cc 100644
>> --- a/drivers/gpu/drm/i915/gt/gen8_ppgtt.c
>> +++ b/drivers/gpu/drm/i915/gt/gen8_ppgtt.c
>> @@ -55,6 +55,34 @@ static u64 gen8_pte_encode(dma_addr_t addr,
>>        return pte;
>>   }
>>  
>> +static u64 mtl_pte_encode(dma_addr_t addr,
>> +                       enum i915_cache_level level,
>> +                       u32 flags)
>> +{
>> +     gen8_pte_t pte = addr | GEN8_PAGE_PRESENT | GEN8_PAGE_RW;
>> +
>> +     if (unlikely(flags & PTE_READ_ONLY))
>> +             pte &= ~GEN8_PAGE_RW;
>> +
>> +     if (flags & PTE_LM)
>> +             pte |= GEN12_PPGTT_PTE_LM | GEN12_PPGTT_PTE_NC;
>> +
>> +     switch (level) {
>> +     case I915_CACHE_NONE:
>> +             pte |= GEN12_PPGTT_PTE_PAT1;
>> +             break;
>> +     case I915_CACHE_LLC:
>> +     case I915_CACHE_L3_LLC:
>> +             pte |= GEN12_PPGTT_PTE_PAT0 | GEN12_PPGTT_PTE_PAT1;
>> +             break;
>> +     case I915_CACHE_WT:
>> +             pte |= GEN12_PPGTT_PTE_PAT0;
>> +             break;
>> +     }
>> +
>> +     return pte;
>> +}
>> +
>>   static void gen8_ppgtt_notify_vgt(struct i915_ppgtt *ppgtt, bool create)
>>   {
>>        struct drm_i915_private *i915 = ppgtt->vm.i915;
>> @@ -427,7 +455,7 @@ gen8_ppgtt_insert_pte(struct i915_ppgtt *ppgtt,
>>                      u32 flags)
>>   {
>>        struct i915_page_directory *pd;
>> -     const gen8_pte_t pte_encode = gen8_pte_encode(0, cache_level, flags);
>> +     const gen8_pte_t pte_encode = ppgtt->vm.pte_encode(0, cache_level, flags);
>>        gen8_pte_t *vaddr;
>>  
>>        pd = i915_pd_entry(pdp, gen8_pd_index(idx, 2));
>> @@ -580,7 +608,7 @@ static void gen8_ppgtt_insert_huge(struct i915_address_space *vm,
>>                                   enum i915_cache_level cache_level,
>>                                   u32 flags)
>>   {
>> -     const gen8_pte_t pte_encode = gen8_pte_encode(0, cache_level, flags);
>> +     const gen8_pte_t pte_encode = vm->pte_encode(0, cache_level, flags);
>>        unsigned int rem = sg_dma_len(iter->sg);
>>        u64 start = vma_res->start;
>>  
>> @@ -743,7 +771,7 @@ static void gen8_ppgtt_insert_entry(struct i915_address_space *vm,
>>        GEM_BUG_ON(pt->is_compact);
>>  
>>        vaddr = px_vaddr(pt);
>> -     vaddr[gen8_pd_index(idx, 0)] = gen8_pte_encode(addr, level, flags);
>> +     vaddr[gen8_pd_index(idx, 0)] = vm->pte_encode(addr, level, flags);
>>        drm_clflush_virt_range(&vaddr[gen8_pd_index(idx, 0)], sizeof(*vaddr));
>>   }
>>  
>> @@ -773,7 +801,7 @@ static void __xehpsdv_ppgtt_insert_entry_lm(struct i915_address_space *vm,
>>        }
>>  
>>        vaddr = px_vaddr(pt);
>> -     vaddr[gen8_pd_index(idx, 0) / 16] = gen8_pte_encode(addr, level, flags);
>> +     vaddr[gen8_pd_index(idx, 0) / 16] = vm->pte_encode(addr, level, flags);
>>   }
>>  
>>   static void xehpsdv_ppgtt_insert_entry(struct i915_address_space *vm,
>> @@ -820,7 +848,7 @@ static int gen8_init_scratch(struct i915_address_space *vm)
>>                pte_flags |= PTE_LM;
>>  
>>        vm->scratch[0]->encode =
>> -             gen8_pte_encode(px_dma(vm->scratch[0]),
>> +             vm->pte_encode(px_dma(vm->scratch[0]),
>>                                I915_CACHE_NONE, pte_flags);
>>  
>>        for (i = 1; i <= vm->top; i++) {
>> @@ -963,7 +991,10 @@ struct i915_ppgtt *gen8_ppgtt_create(struct intel_gt *gt,
>>         */
>>        ppgtt->vm.alloc_scratch_dma = alloc_pt_dma;
>>  
>> -     ppgtt->vm.pte_encode = gen8_pte_encode;
>> +     if (GRAPHICS_VER_FULL(gt->i915) >= IP_VER(12, 70))
>> +             ppgtt->vm.pte_encode = mtl_pte_encode;
>> +     else
>> +             ppgtt->vm.pte_encode = gen8_pte_encode;
>>  
>>        ppgtt->vm.bind_async_flags = I915_VMA_LOCAL_BIND;
>>        ppgtt->vm.insert_entries = gen8_ppgtt_insert;
>> diff --git a/drivers/gpu/drm/i915/gt/gen8_ppgtt.h b/drivers/gpu/drm/i915/gt/gen8_ppgtt.h
>> index f541d19264b4..6b8ce7f4d25a 100644
>> --- a/drivers/gpu/drm/i915/gt/gen8_ppgtt.h
>> +++ b/drivers/gpu/drm/i915/gt/gen8_ppgtt.h
>> @@ -18,5 +18,8 @@ struct i915_ppgtt *gen8_ppgtt_create(struct intel_gt *gt,
>>   u64 gen8_ggtt_pte_encode(dma_addr_t addr,
>>                         enum i915_cache_level level,
>>                         u32 flags);
>> +u64 mtl_ggtt_pte_encode(dma_addr_t addr,
>> +                     unsigned int pat_index,
>> +                     u32 flags);
>>  
>>   #endif
>> diff --git a/drivers/gpu/drm/i915/gt/intel_ggtt.c b/drivers/gpu/drm/i915/gt/intel_ggtt.c
>> index 3c7f1ed92f5b..ba3109338aee 100644
>> --- a/drivers/gpu/drm/i915/gt/intel_ggtt.c
>> +++ b/drivers/gpu/drm/i915/gt/intel_ggtt.c
>> @@ -220,6 +220,33 @@ static void guc_ggtt_invalidate(struct i915_ggtt *ggtt)
>>        }
>>   }
>>  
>> +u64 mtl_ggtt_pte_encode(dma_addr_t addr,
>> +                     enum i915_cache_level level,
>> +                     u32 flags)
>> +{
>> +     gen8_pte_t pte = addr | GEN8_PAGE_PRESENT;
>> +
>> +     GEM_BUG_ON(addr & ~GEN12_GGTT_PTE_ADDR_MASK);
>> +
>> +     if (flags & PTE_LM)
>> +             pte |= GEN12_GGTT_PTE_LM;
>> +
>> +     switch (level) {
>> +     case I915_CACHE_NONE:
>> +             pte |= MTL_GGTT_PTE_PAT1;
>> +             break;
>> +     case I915_CACHE_LLC:
>> +     case I915_CACHE_L3_LLC:
>> +             pte |= MTL_GGTT_PTE_PAT0 | MTL_GGTT_PTE_PAT1;
>> +             break;
>> +     case I915_CACHE_WT:
>> +             pte |= MTL_GGTT_PTE_PAT0;
>> +             break;
>> +     }
>> +
>> +     return pte;
>> +}
>> +
>>   u64 gen8_ggtt_pte_encode(dma_addr_t addr,
>>                         enum i915_cache_level level,
>>                         u32 flags)
>> @@ -247,7 +274,7 @@ static void gen8_ggtt_insert_page(struct i915_address_space *vm,
>>        gen8_pte_t __iomem *pte =
>>                (gen8_pte_t __iomem *)ggtt->gsm + offset / I915_GTT_PAGE_SIZE;
>>  
>> -     gen8_set_pte(pte, gen8_ggtt_pte_encode(addr, level, flags));
>> +     gen8_set_pte(pte, ggtt->vm.pte_encode(addr, level, flags));
>>  
>>        ggtt->invalidate(ggtt);
>>   }
>> @@ -257,8 +284,8 @@ static void gen8_ggtt_insert_entries(struct i915_address_space *vm,
>>                                     enum i915_cache_level level,
>>                                     u32 flags)
>>   {
>> -     const gen8_pte_t pte_encode = gen8_ggtt_pte_encode(0, level, flags);
>>        struct i915_ggtt *ggtt = i915_vm_to_ggtt(vm);
>> +     const gen8_pte_t pte_encode = ggtt->vm.pte_encode(0, level, flags);
>>        gen8_pte_t __iomem *gte;
>>        gen8_pte_t __iomem *end;
>>        struct sgt_iter iter;
>> @@ -981,7 +1008,10 @@ static int gen8_gmch_probe(struct i915_ggtt *ggtt)
>>        ggtt->vm.vma_ops.bind_vma    = intel_ggtt_bind_vma;
>>        ggtt->vm.vma_ops.unbind_vma  = intel_ggtt_unbind_vma;
>>  
>> -     ggtt->vm.pte_encode = gen8_ggtt_pte_encode;
>> +     if (GRAPHICS_VER_FULL(i915) >= IP_VER(12, 70))
>> +             ggtt->vm.pte_encode = mtl_ggtt_pte_encode;
>> +     else
>> +             ggtt->vm.pte_encode = gen8_ggtt_pte_encode;
>>  
>>        return ggtt_probe_common(ggtt, size);
>>   }
>> diff --git a/drivers/gpu/drm/i915/gt/intel_gtt.c b/drivers/gpu/drm/i915/gt/intel_gtt.c
>> index 4f436ba7a3c8..1e1b34e22cf5 100644
>> --- a/drivers/gpu/drm/i915/gt/intel_gtt.c
>> +++ b/drivers/gpu/drm/i915/gt/intel_gtt.c
>> @@ -468,6 +468,25 @@ void gtt_write_workarounds(struct intel_gt *gt)
>>        }
>>   }
>>  
>> +static void mtl_setup_private_ppat(struct intel_uncore *uncore)
>> +{
>> +     intel_uncore_write(uncore, GEN12_PAT_INDEX(0),
>> +                        MTL_PPAT_L4_0_WB);
>> +     intel_uncore_write(uncore, GEN12_PAT_INDEX(1),
>> +                        MTL_PPAT_L4_1_WT);
>> +     intel_uncore_write(uncore, GEN12_PAT_INDEX(2),
>> +                        MTL_PPAT_L4_3_UC);
>> +     intel_uncore_write(uncore, GEN12_PAT_INDEX(3),
>> +                        MTL_PPAT_L4_0_WB | MTL_2_COH_1W);
>> +     intel_uncore_write(uncore, GEN12_PAT_INDEX(4),
>> +                        MTL_PPAT_L4_0_WB | MTL_3_COH_2W);
>> +
>> +     /*
>> +      * Remaining PAT entries are left at the hardware-default
>> +      * fully-cached setting
>> +      */
>> +}
>> +
>>   static void tgl_setup_private_ppat(struct intel_uncore *uncore)
>>   {
>>        /* TGL doesn't support LLC or AGE settings */
>> @@ -603,7 +622,9 @@ void setup_private_pat(struct intel_gt *gt)
>>  
>>        GEM_BUG_ON(GRAPHICS_VER(i915) < 8);
>>  
>> -     if (GRAPHICS_VER_FULL(i915) >= IP_VER(12, 50))
>> +     if (IS_METEORLAKE(i915))
>> +             mtl_setup_private_ppat(uncore);
>
>
> Could you please sync this with DII. We should be programming PAT for
> media tile too.
>
> I have refactor this patch in DII along with taking care of media tile
> and I think we should
>
> get those changes here too.

I don't think the PAT index registers are multicasted for MTL. The registers
are at 0x4800 for the render tile and 0x384800 for the media tile, and they
get programmed in gt_init separately when iterating through each gt. No?


Primary GT is multicasted but the media one is not for MTL.
Added you to a internal email thread where Matt clarified this.


Regards,

Nirmoy


-Fei

> Regards,
>
> Nirmoy
>
>> +     else if (GRAPHICS_VER_FULL(i915) >= IP_VER(12, 50))
>>                xehp_setup_private_ppat(gt);
>>        else if (GRAPHICS_VER(i915) >= 12)
>>                tgl_setup_private_ppat(uncore);
>> diff --git a/drivers/gpu/drm/i915/gt/intel_gtt.h b/drivers/gpu/drm/i915/gt/intel_gtt.h
>> index 69ce55f517f5..b632167eaf2e 100644
>> --- a/drivers/gpu/drm/i915/gt/intel_gtt.h
>> +++ b/drivers/gpu/drm/i915/gt/intel_gtt.h
>> @@ -88,9 +88,18 @@ typedef u64 gen8_pte_t;
>>   #define BYT_PTE_SNOOPED_BY_CPU_CACHES       REG_BIT(2)
>>   #define BYT_PTE_WRITEABLE           REG_BIT(1)
>>  
>> +#define GEN12_PPGTT_PTE_PAT3    BIT_ULL(62)
>>   #define GEN12_PPGTT_PTE_LM  BIT_ULL(11)
>> +#define GEN12_PPGTT_PTE_PAT2    BIT_ULL(7)
>> +#define GEN12_PPGTT_PTE_NC      BIT_ULL(5)
>> +#define GEN12_PPGTT_PTE_PAT1    BIT_ULL(4)
>> +#define GEN12_PPGTT_PTE_PAT0    BIT_ULL(3)
>>  
>> -#define GEN12_GGTT_PTE_LM    BIT_ULL(1)
>> +#define GEN12_GGTT_PTE_LM            BIT_ULL(1)
>> +#define MTL_GGTT_PTE_PAT0            BIT_ULL(52)
>> +#define MTL_GGTT_PTE_PAT1            BIT_ULL(53)
>> +#define GEN12_GGTT_PTE_ADDR_MASK     GENMASK_ULL(45, 12)
>> +#define MTL_GGTT_PTE_PAT_MASK                GENMASK_ULL(53, 52)
>>  
>>   #define GEN12_PDE_64K BIT(6)
>>   #define GEN12_PTE_PS64 BIT(8)
>> @@ -147,6 +156,15 @@ typedef u64 gen8_pte_t;
>>   #define GEN8_PDE_IPS_64K BIT(11)
>>   #define GEN8_PDE_PS_2M   BIT(7)
>>  
>> +#define MTL_PPAT_L4_CACHE_POLICY_MASK        REG_GENMASK(3, 2)
>> +#define MTL_PAT_INDEX_COH_MODE_MASK  REG_GENMASK(1, 0)
>> +#define MTL_PPAT_L4_3_UC     REG_FIELD_PREP(MTL_PPAT_L4_CACHE_POLICY_MASK, 3)
>> +#define MTL_PPAT_L4_1_WT     REG_FIELD_PREP(MTL_PPAT_L4_CACHE_POLICY_MASK, 1)
>> +#define MTL_PPAT_L4_0_WB     REG_FIELD_PREP(MTL_PPAT_L4_CACHE_POLICY_MASK, 0)
>> +#define MTL_3_COH_2W REG_FIELD_PREP(MTL_PAT_INDEX_COH_MODE_MASK, 3)
>> +#define MTL_2_COH_1W REG_FIELD_PREP(MTL_PAT_INDEX_COH_MODE_MASK, 2)
>> +#define MTL_0_COH_NON        REG_FIELD_PREP(MTL_PAT_INDEX_COH_MODE_MASK, 0)
>> +
>>   enum i915_cache_level;
>>  
>>   struct drm_i915_gem_object;
>> diff --git a/drivers/gpu/drm/i915/gt/intel_mocs.c b/drivers/gpu/drm/i915/gt/intel_mocs.c
>> index 69b489e8dfed..89570f137b2c 100644
>> --- a/drivers/gpu/drm/i915/gt/intel_mocs.c
>> +++ b/drivers/gpu/drm/i915/gt/intel_mocs.c
>> @@ -40,6 +40,10 @@ struct drm_i915_mocs_table {
>>   #define LE_COS(value)               ((value) << 15)
>>   #define LE_SSE(value)               ((value) << 17)
>>  
>> +/* Defines for the tables (GLOB_MOCS_0 - GLOB_MOCS_16) */
>> +#define _L4_CACHEABILITY(value)      ((value) << 2)
>> +#define IG_PAT(value)                ((value) << 8)
>> +
>>   /* Defines for the tables (LNCFMOCS0 - LNCFMOCS31) - two entries per word */
>>   #define L3_ESC(value)               ((value) << 0)
>>   #define L3_SCC(value)               ((value) << 1)
>> @@ -50,6 +54,7 @@ struct drm_i915_mocs_table {
>>   /* Helper defines */
>>   #define GEN9_NUM_MOCS_ENTRIES       64  /* 63-64 are reserved, but configured. */
>>   #define PVC_NUM_MOCS_ENTRIES        3
>> +#define MTL_NUM_MOCS_ENTRIES 16
>>  
>>   /* (e)LLC caching options */
>>   /*
>> @@ -73,6 +78,12 @@ struct drm_i915_mocs_table {
>>   #define L3_2_RESERVED               _L3_CACHEABILITY(2)
>>   #define L3_3_WB                     _L3_CACHEABILITY(3)
>>  
>> +/* L4 caching options */
>> +#define L4_0_WB                      _L4_CACHEABILITY(0)
>> +#define L4_1_WT                      _L4_CACHEABILITY(1)
>> +#define L4_2_RESERVED                _L4_CACHEABILITY(2)
>> +#define L4_3_UC                      _L4_CACHEABILITY(3)
>> +
>>   #define MOCS_ENTRY(__idx, __control_value, __l3cc_value) \
>>        [__idx] = { \
>>                .control_value = __control_value, \
>> @@ -416,6 +427,57 @@ static const struct drm_i915_mocs_entry pvc_mocs_table[] = {
>>        MOCS_ENTRY(2, 0, L3_3_WB),
>>   };
>>  
>> +static const struct drm_i915_mocs_entry mtl_mocs_table[] = {
>> +     /* Error - Reserved for Non-Use */
>> +     MOCS_ENTRY(0,
>> +                IG_PAT(0),
>> +                L3_LKUP(1) | L3_3_WB),
>> +     /* Cached - L3 + L4 */
>> +     MOCS_ENTRY(1,
>> +                IG_PAT(1),
>> +                L3_LKUP(1) | L3_3_WB),
>> +     /* L4 - GO:L3 */
>> +     MOCS_ENTRY(2,
>> +                IG_PAT(1),
>> +                L3_LKUP(1) | L3_1_UC),
>> +     /* Uncached - GO:L3 */
>> +     MOCS_ENTRY(3,
>> +                IG_PAT(1) | L4_3_UC,
>> +                L3_LKUP(1) | L3_1_UC),
>> +     /* L4 - GO:Mem */
>> +     MOCS_ENTRY(4,
>> +                IG_PAT(1),
>> +                L3_LKUP(1) | L3_GLBGO(1) | L3_1_UC),
>> +     /* Uncached - GO:Mem */
>> +     MOCS_ENTRY(5,
>> +                IG_PAT(1) | L4_3_UC,
>> +                L3_LKUP(1) | L3_GLBGO(1) | L3_1_UC),
>> +     /* L4 - L3:NoLKUP; GO:L3 */
>> +     MOCS_ENTRY(6,
>> +                IG_PAT(1),
>> +                L3_1_UC),
>> +     /* Uncached - L3:NoLKUP; GO:L3 */
>> +     MOCS_ENTRY(7,
>> +                IG_PAT(1) | L4_3_UC,
>> +                L3_1_UC),
>> +     /* L4 - L3:NoLKUP; GO:Mem */
>> +     MOCS_ENTRY(8,
>> +                IG_PAT(1),
>> +                L3_GLBGO(1) | L3_1_UC),
>> +     /* Uncached - L3:NoLKUP; GO:Mem */
>> +     MOCS_ENTRY(9,
>> +                IG_PAT(1) | L4_3_UC,
>> +                L3_GLBGO(1) | L3_1_UC),
>> +     /* Display - L3; L4:WT */
>> +     MOCS_ENTRY(14,
>> +                IG_PAT(1) | L4_1_WT,
>> +                L3_LKUP(1) | L3_3_WB),
>> +     /* CCS - Non-Displayable */
>> +     MOCS_ENTRY(15,
>> +                IG_PAT(1),
>> +                L3_GLBGO(1) | L3_1_UC),
>> +};
>> +
>>   enum {
>>        HAS_GLOBAL_MOCS = BIT(0),
>>        HAS_ENGINE_MOCS = BIT(1),
>> @@ -445,7 +507,13 @@ static unsigned int get_mocs_settings(const struct drm_i915_private *i915,
>>        memset(table, 0, sizeof(struct drm_i915_mocs_table));
>>  
>>        table->unused_entries_index = I915_MOCS_PTE;
>> -     if (IS_PONTEVECCHIO(i915)) {
>> +     if (IS_METEORLAKE(i915)) {
>> +             table->size = ARRAY_SIZE(mtl_mocs_table);
>> +             table->table = mtl_mocs_table;
>> +             table->n_entries = MTL_NUM_MOCS_ENTRIES;
>> +             table->uc_index = 9;
>> +             table->unused_entries_index = 1;
>> +     } else if (IS_PONTEVECCHIO(i915)) {
>>                table->size = ARRAY_SIZE(pvc_mocs_table);
>>                table->table = pvc_mocs_table;
>>                table->n_entries = PVC_NUM_MOCS_ENTRIES;
>> @@ -646,9 +714,9 @@ void intel_mocs_init_engine(struct intel_engine_cs *engine)
>>                init_l3cc_table(engine->gt, &table);
>>   }
>>  
>> -static u32 global_mocs_offset(void)
>> +static u32 global_mocs_offset(struct intel_gt *gt)
>>   {
>> -     return i915_mmio_reg_offset(GEN12_GLOBAL_MOCS(0));
>> +     return i915_mmio_reg_offset(GEN12_GLOBAL_MOCS(0)) + gt->uncore->gsi_offset;
>>   }
>>  
>>   void intel_set_mocs_index(struct intel_gt *gt)
>> @@ -671,7 +739,7 @@ void intel_mocs_init(struct intel_gt *gt)
>>         */
>>        flags = get_mocs_settings(gt->i915, &table);
>>        if (flags & HAS_GLOBAL_MOCS)
>> -             __init_mocs_table(gt->uncore, &table, global_mocs_offset());
>> +             __init_mocs_table(gt->uncore, &table, global_mocs_offset(gt));
>>  
>>        /*
>>         * Initialize the L3CC table as part of mocs initalization to make
>> diff --git a/drivers/gpu/drm/i915/gt/selftest_mocs.c b/drivers/gpu/drm/i915/gt/selftest_mocs.c
>> index ca009a6a13bd..730796346514 100644
>> --- a/drivers/gpu/drm/i915/gt/selftest_mocs.c
>> +++ b/drivers/gpu/drm/i915/gt/selftest_mocs.c
>> @@ -137,7 +137,7 @@ static int read_mocs_table(struct i915_request *rq,
>>                return 0;
>>  
>>        if (HAS_GLOBAL_MOCS_REGISTERS(rq->engine->i915))
>> -             addr = global_mocs_offset();
>> +             addr = global_mocs_offset(rq->engine->gt);
>>        else
>>                addr = mocs_offset(rq->engine);
>>  
>> diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c
>> index 621730b6551c..480b128499ae 100644
>> --- a/drivers/gpu/drm/i915/i915_pci.c
>> +++ b/drivers/gpu/drm/i915/i915_pci.c
>> @@ -1149,6 +1149,7 @@ static const struct intel_device_info mtl_info = {
>>        .has_flat_ccs = 0,
>>        .has_gmd_id = 1,
>>        .has_guc_deprivilege = 1,
>> +     .has_llc = 0,
>>        .has_mslice_steering = 0,
>>        .has_snoop = 1,
>>        .__runtime.memory_regions = REGION_SMEM | REGION_STOLEN_LMEM,


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