[PATCH 6/7] cxl: Isolate few psl8 specific calls
Christophe Lombard
clombard at linux.vnet.ibm.com
Thu Feb 2 04:30:12 AEDT 2017
Point out the specific Coherent Accelerator Interface Architecture,
level 1, registers.
Code and functions specific to PSL8 (CAIA1) must be framed.
Signed-off-by: Christophe Lombard <clombard at linux.vnet.ibm.com>
---
drivers/misc/cxl/context.c | 28 +++++++++++---------
drivers/misc/cxl/cxl.h | 35 +++++++++++++++++++------
drivers/misc/cxl/debugfs.c | 6 +++--
drivers/misc/cxl/fault.c | 14 +++++-----
drivers/misc/cxl/native.c | 50 ++++++++++++++++++++++--------------
drivers/misc/cxl/pci.c | 64 +++++++++++++++++++++++++++++++---------------
6 files changed, 129 insertions(+), 68 deletions(-)
diff --git a/drivers/misc/cxl/context.c b/drivers/misc/cxl/context.c
index 89242c1..1835067 100644
--- a/drivers/misc/cxl/context.c
+++ b/drivers/misc/cxl/context.c
@@ -38,23 +38,26 @@ int cxl_context_init(struct cxl_context *ctx, struct cxl_afu *afu, bool master)
{
int i;
- spin_lock_init(&ctx->sste_lock);
+ if (cxl_is_psl8(afu))
+ spin_lock_init(&ctx->sste_lock);
ctx->afu = afu;
ctx->master = master;
ctx->pid = NULL; /* Set in start work ioctl */
mutex_init(&ctx->mapping_lock);
ctx->mapping = NULL;
- /*
- * Allocate the segment table before we put it in the IDR so that we
- * can always access it when dereferenced from IDR. For the same
- * reason, the segment table is only destroyed after the context is
- * removed from the IDR. Access to this in the IOCTL is protected by
- * Linux filesytem symantics (can't IOCTL until open is complete).
- */
- i = cxl_alloc_sst(ctx);
- if (i)
- return i;
+ if (cxl_is_psl8(afu)) {
+ /*
+ * Allocate the segment table before we put it in the IDR so that we
+ * can always access it when dereferenced from IDR. For the same
+ * reason, the segment table is only destroyed after the context is
+ * removed from the IDR. Access to this in the IOCTL is protected by
+ * Linux filesytem symantics (can't IOCTL until open is complete).
+ */
+ i = cxl_alloc_sst(ctx);
+ if (i)
+ return i;
+ }
INIT_WORK(&ctx->fault_work, cxl_handle_fault);
@@ -305,7 +308,8 @@ static void reclaim_ctx(struct rcu_head *rcu)
{
struct cxl_context *ctx = container_of(rcu, struct cxl_context, rcu);
- free_page((u64)ctx->sstp);
+ if (cxl_is_psl8(ctx->afu))
+ free_page((u64)ctx->sstp);
if (ctx->ff_page)
__free_page(ctx->ff_page);
ctx->sstp = NULL;
diff --git a/drivers/misc/cxl/cxl.h b/drivers/misc/cxl/cxl.h
index dbd3fc36..ddc787e 100644
--- a/drivers/misc/cxl/cxl.h
+++ b/drivers/misc/cxl/cxl.h
@@ -73,7 +73,7 @@ static const cxl_p1_reg_t CXL_PSL_Control = {0x0020};
static const cxl_p1_reg_t CXL_PSL_DLCNTL = {0x0060};
static const cxl_p1_reg_t CXL_PSL_DLADDR = {0x0068};
-/* PSL Lookaside Buffer Management Area */
+/* PSL Lookaside Buffer Management Area - CAIA 1 */
static const cxl_p1_reg_t CXL_PSL_LBISEL = {0x0080};
static const cxl_p1_reg_t CXL_PSL_SLBIE = {0x0088};
static const cxl_p1_reg_t CXL_PSL_SLBIA = {0x0090};
@@ -82,7 +82,7 @@ static const cxl_p1_reg_t CXL_PSL_TLBIA = {0x00A8};
static const cxl_p1_reg_t CXL_PSL_AFUSEL = {0x00B0};
/* 0x00C0:7EFF Implementation dependent area */
-/* PSL registers */
+/* PSL registers - CAIA 1 */
static const cxl_p1_reg_t CXL_PSL_FIR1 = {0x0100};
static const cxl_p1_reg_t CXL_PSL_FIR2 = {0x0108};
static const cxl_p1_reg_t CXL_PSL_Timebase = {0x0110};
@@ -109,7 +109,7 @@ static const cxl_p1n_reg_t CXL_PSL_AMBAR_An = {0x10};
static const cxl_p1n_reg_t CXL_PSL_SPOffset_An = {0x18};
static const cxl_p1n_reg_t CXL_PSL_ID_An = {0x20};
static const cxl_p1n_reg_t CXL_PSL_SERR_An = {0x28};
-/* Memory Management and Lookaside Buffer Management */
+/* Memory Management and Lookaside Buffer Management - CAIA 1*/
static const cxl_p1n_reg_t CXL_PSL_SDR_An = {0x30};
static const cxl_p1n_reg_t CXL_PSL_AMOR_An = {0x38};
/* Pointer Area */
@@ -124,6 +124,7 @@ static const cxl_p1n_reg_t CXL_PSL_IVTE_Limit_An = {0xB8};
/* 0xC0:FF Implementation Dependent Area */
static const cxl_p1n_reg_t CXL_PSL_FIR_SLICE_An = {0xC0};
static const cxl_p1n_reg_t CXL_AFU_DEBUG_An = {0xC8};
+/* 0xC0:FF Implementation Dependent Area - CAIA 1 */
static const cxl_p1n_reg_t CXL_PSL_APCALLOC_A = {0xD0};
static const cxl_p1n_reg_t CXL_PSL_COALLOC_A = {0xD8};
static const cxl_p1n_reg_t CXL_PSL_RXCTL_A = {0xE0};
@@ -133,12 +134,14 @@ static const cxl_p1n_reg_t CXL_PSL_SLICE_TRACE = {0xE8};
/* Configuration and Control Area */
static const cxl_p2n_reg_t CXL_PSL_PID_TID_An = {0x000};
static const cxl_p2n_reg_t CXL_CSRP_An = {0x008};
+/* Configuration and Control Area - CAIA 1 */
static const cxl_p2n_reg_t CXL_AURP0_An = {0x010};
static const cxl_p2n_reg_t CXL_AURP1_An = {0x018};
static const cxl_p2n_reg_t CXL_SSTP0_An = {0x020};
static const cxl_p2n_reg_t CXL_SSTP1_An = {0x028};
+/* Configuration and Control Area - CAIA 1 */
static const cxl_p2n_reg_t CXL_PSL_AMR_An = {0x030};
-/* Segment Lookaside Buffer Management */
+/* Segment Lookaside Buffer Management - CAIA 1 */
static const cxl_p2n_reg_t CXL_SLBIE_An = {0x040};
static const cxl_p2n_reg_t CXL_SLBIA_An = {0x048};
static const cxl_p2n_reg_t CXL_SLBI_Select_An = {0x050};
@@ -257,7 +260,7 @@ static const cxl_p2n_reg_t CXL_PSL_WED_An = {0x0A0};
#define CXL_SSTP1_An_STVA_L_MASK (~((1ull << (63-55))-1))
#define CXL_SSTP1_An_V (1ull << (63-63))
-/****** CXL_PSL_SLBIE_[An] **************************************************/
+/****** CXL_PSL_SLBIE_[An] - CAIA 1 **************************************************/
/* write: */
#define CXL_SLBIE_C PPC_BIT(36) /* Class */
#define CXL_SLBIE_SS PPC_BITMASK(37, 38) /* Segment Size */
@@ -267,10 +270,10 @@ static const cxl_p2n_reg_t CXL_PSL_WED_An = {0x0A0};
#define CXL_SLBIE_MAX PPC_BITMASK(24, 31)
#define CXL_SLBIE_PENDING PPC_BITMASK(56, 63)
-/****** Common to all CXL_TLBIA/SLBIA_[An] **********************************/
+/****** Common to all CXL_TLBIA/SLBIA_[An] - CAIA 1 **********************************/
#define CXL_TLB_SLB_P (1ull) /* Pending (read) */
-/****** Common to all CXL_TLB/SLB_IA/IE_[An] registers **********************/
+/****** Common to all CXL_TLB/SLB_IA/IE_[An] registers - CAIA 1 **********************/
#define CXL_TLB_SLB_IQ_ALL (0ull) /* Inv qualifier */
#define CXL_TLB_SLB_IQ_LPID (1ull) /* Inv qualifier */
#define CXL_TLB_SLB_IQ_LPIDPID (3ull) /* Inv qualifier */
@@ -278,7 +281,7 @@ static const cxl_p2n_reg_t CXL_PSL_WED_An = {0x0A0};
/****** CXL_PSL_AFUSEL ******************************************************/
#define CXL_PSL_AFUSEL_A (1ull << (63-55)) /* Adapter wide invalidates affect all AFUs */
-/****** CXL_PSL_DSISR_An ****************************************************/
+/****** CXL_PSL_DSISR_An - CAIA 1 ****************************************************/
#define CXL_PSL_DSISR_An_DS (1ull << (63-0)) /* Segment not found */
#define CXL_PSL_DSISR_An_DM (1ull << (63-1)) /* PTE not found (See also: M) or protection fault */
#define CXL_PSL_DSISR_An_ST (1ull << (63-2)) /* Segment Table PTE not found */
@@ -746,6 +749,22 @@ static inline u64 cxl_p2n_read(struct cxl_afu *afu, cxl_p2n_reg_t reg)
return ~0ULL;
}
+static inline bool cxl_is_power8(void)
+{
+ if ((pvr_version_is(PVR_POWER8E)) ||
+ (pvr_version_is(PVR_POWER8NVL)) ||
+ (pvr_version_is(PVR_POWER8)))
+ return true;
+ return false;
+}
+
+static inline bool cxl_is_psl8(struct cxl_afu *afu)
+{
+ if (afu->adapter->caia_major == 1)
+ return true;
+ return false;
+}
+
ssize_t cxl_pci_afu_read_err_buffer(struct cxl_afu *afu, char *buf,
loff_t off, size_t count);
diff --git a/drivers/misc/cxl/debugfs.c b/drivers/misc/cxl/debugfs.c
index 2ff10a9..43a1a27 100644
--- a/drivers/misc/cxl/debugfs.c
+++ b/drivers/misc/cxl/debugfs.c
@@ -94,6 +94,9 @@ void cxl_debugfs_adapter_remove(struct cxl *adapter)
void cxl_debugfs_add_afu_regs_psl8(struct cxl_afu *afu, struct dentry *dir)
{
+ debugfs_create_io_x64("sstp0", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_SSTP0_An));
+ debugfs_create_io_x64("sstp1", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_SSTP1_An));
+
debugfs_create_io_x64("fir", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_FIR_SLICE_An));
debugfs_create_io_x64("serr", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SERR_An));
debugfs_create_io_x64("afu_debug", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_AFU_DEBUG_An));
@@ -117,8 +120,7 @@ int cxl_debugfs_afu_add(struct cxl_afu *afu)
debugfs_create_io_x64("sr", S_IRUSR, dir, _cxl_p1n_addr(afu, CXL_PSL_SR_An));
debugfs_create_io_x64("dsisr", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_DSISR_An));
debugfs_create_io_x64("dar", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_DAR_An));
- debugfs_create_io_x64("sstp0", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_SSTP0_An));
- debugfs_create_io_x64("sstp1", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_SSTP1_An));
+
debugfs_create_io_x64("err_status", S_IRUSR, dir, _cxl_p2n_addr(afu, CXL_PSL_ErrStat_An));
if (afu->adapter->native->sl_ops->debugfs_add_afu_regs)
diff --git a/drivers/misc/cxl/fault.c b/drivers/misc/cxl/fault.c
index ece7ea3..acf8b7a 100644
--- a/drivers/misc/cxl/fault.c
+++ b/drivers/misc/cxl/fault.c
@@ -223,12 +223,14 @@ void cxl_handle_fault(struct work_struct *fault_work)
}
}
- if (dsisr & CXL_PSL_DSISR_An_DS)
- cxl_handle_segment_miss(ctx, mm, dar);
- else if (dsisr & CXL_PSL_DSISR_An_DM)
- cxl_handle_page_fault(ctx, mm, dsisr, dar);
- else
- WARN(1, "cxl_handle_fault has nothing to handle\n");
+ if (cxl_is_psl8(ctx->afu)) {
+ if (dsisr & CXL_PSL_DSISR_An_DS)
+ cxl_handle_segment_miss(ctx, mm, dar);
+ else if (dsisr & CXL_PSL_DSISR_An_DM)
+ cxl_handle_page_fault(ctx, mm, dsisr, dar);
+ else
+ WARN(1, "cxl_handle_fault has nothing to handle\n");
+ }
if (mm)
mmput(mm);
diff --git a/drivers/misc/cxl/native.c b/drivers/misc/cxl/native.c
index 8805d8c..a58a6a2 100644
--- a/drivers/misc/cxl/native.c
+++ b/drivers/misc/cxl/native.c
@@ -155,15 +155,17 @@ int cxl_psl_purge(struct cxl_afu *afu)
dsisr = cxl_p2n_read(afu, CXL_PSL_DSISR_An);
pr_devel_ratelimited("PSL purging... PSL_CNTL: 0x%016llx PSL_DSISR: 0x%016llx\n", PSL_CNTL, dsisr);
- if (dsisr & CXL_PSL_DSISR_TRANS) {
- dar = cxl_p2n_read(afu, CXL_PSL_DAR_An);
- dev_notice(&afu->dev, "PSL purge terminating pending translation, DSISR: 0x%016llx, DAR: 0x%016llx\n", dsisr, dar);
- cxl_p2n_write(afu, CXL_PSL_TFC_An, CXL_PSL_TFC_An_AE);
- } else if (dsisr) {
- dev_notice(&afu->dev, "PSL purge acknowledging pending non-translation fault, DSISR: 0x%016llx\n", dsisr);
- cxl_p2n_write(afu, CXL_PSL_TFC_An, CXL_PSL_TFC_An_A);
- } else {
- cpu_relax();
+ if (cxl_is_psl8(afu)) {
+ if (dsisr & CXL_PSL_DSISR_TRANS) {
+ dar = cxl_p2n_read(afu, CXL_PSL_DAR_An);
+ dev_notice(&afu->dev, "PSL purge terminating pending translation, DSISR: 0x%016llx, DAR: 0x%016llx\n", dsisr, dar);
+ cxl_p2n_write(afu, CXL_PSL_TFC_An, CXL_PSL_TFC_An_AE);
+ } else if (dsisr) {
+ dev_notice(&afu->dev, "PSL purge acknowledging pending non-translation fault, DSISR: 0x%016llx\n", dsisr);
+ cxl_p2n_write(afu, CXL_PSL_TFC_An, CXL_PSL_TFC_An_A);
+ } else {
+ cpu_relax();
+ }
}
PSL_CNTL = cxl_p1n_read(afu, CXL_PSL_SCNTL_An);
}
@@ -465,7 +467,8 @@ static int remove_process_element(struct cxl_context *ctx)
if (!rc)
ctx->pe_inserted = false;
- slb_invalid(ctx);
+ if (cxl_is_power8())
+ slb_invalid(ctx);
pr_devel("%s Remove pe: %i finished\n", __func__, ctx->pe);
mutex_unlock(&ctx->afu->native->spa_mutex);
@@ -498,7 +501,8 @@ static int activate_afu_directed(struct cxl_afu *afu)
attach_spa(afu);
cxl_p1n_write(afu, CXL_PSL_SCNTL_An, CXL_PSL_SCNTL_An_PM_AFU);
- cxl_p1n_write(afu, CXL_PSL_AMOR_An, 0xFFFFFFFFFFFFFFFFULL);
+ if (cxl_is_power8())
+ cxl_p1n_write(afu, CXL_PSL_AMOR_An, 0xFFFFFFFFFFFFFFFFULL);
cxl_p1n_write(afu, CXL_PSL_ID_An, CXL_PSL_ID_An_F | CXL_PSL_ID_An_L);
afu->current_mode = CXL_MODE_DIRECTED;
@@ -871,7 +875,8 @@ static int native_get_irq_info(struct cxl_afu *afu, struct cxl_irq_info *info)
info->dsisr = cxl_p2n_read(afu, CXL_PSL_DSISR_An);
info->dar = cxl_p2n_read(afu, CXL_PSL_DAR_An);
- info->dsr = cxl_p2n_read(afu, CXL_PSL_DSR_An);
+ if (cxl_is_power8())
+ info->dsr = cxl_p2n_read(afu, CXL_PSL_DSR_An);
info->afu_err = cxl_p2n_read(afu, CXL_AFU_ERR_An);
info->errstat = cxl_p2n_read(afu, CXL_PSL_ErrStat_An);
info->proc_handle = 0;
@@ -983,7 +988,8 @@ static void native_irq_wait(struct cxl_context *ctx)
if (ph != ctx->pe)
return;
dsisr = cxl_p2n_read(ctx->afu, CXL_PSL_DSISR_An);
- if ((dsisr & CXL_PSL_DSISR_PENDING) == 0)
+ if (cxl_is_psl8(ctx->afu) &&
+ ((dsisr & CXL_PSL_DSISR_PENDING) == 0))
return;
/*
* We are waiting for the workqueue to process our
@@ -1000,21 +1006,26 @@ static void native_irq_wait(struct cxl_context *ctx)
static irqreturn_t native_slice_irq_err(int irq, void *data)
{
struct cxl_afu *afu = data;
- u64 fir_slice, errstat, serr, afu_debug, afu_error, dsisr;
+ u64 errstat, serr, afu_error, dsisr;
/*
* slice err interrupt is only used with full PSL (no XSL)
*/
serr = cxl_p1n_read(afu, CXL_PSL_SERR_An);
- fir_slice = cxl_p1n_read(afu, CXL_PSL_FIR_SLICE_An);
errstat = cxl_p2n_read(afu, CXL_PSL_ErrStat_An);
- afu_debug = cxl_p1n_read(afu, CXL_AFU_DEBUG_An);
afu_error = cxl_p2n_read(afu, CXL_AFU_ERR_An);
dsisr = cxl_p2n_read(afu, CXL_PSL_DSISR_An);
cxl_afu_decode_psl_serr(afu, serr);
- dev_crit(&afu->dev, "PSL_FIR_SLICE_An: 0x%016llx\n", fir_slice);
+
+ if (cxl_is_power8()) {
+ u64 fir_slice, afu_debug;
+
+ fir_slice = cxl_p1n_read(afu, CXL_PSL_FIR_SLICE_An);
+ afu_debug = cxl_p1n_read(afu, CXL_AFU_DEBUG_An);
+ dev_crit(&afu->dev, "PSL_FIR_SLICE_An: 0x%016llx\n", fir_slice);
+ dev_crit(&afu->dev, "CXL_PSL_AFU_DEBUG_An: 0x%016llx\n", afu_debug);
+ }
dev_crit(&afu->dev, "CXL_PSL_ErrStat_An: 0x%016llx\n", errstat);
- dev_crit(&afu->dev, "CXL_PSL_AFU_DEBUG_An: 0x%016llx\n", afu_debug);
dev_crit(&afu->dev, "AFU_ERR_An: 0x%.16llx\n", afu_error);
dev_crit(&afu->dev, "PSL_DSISR_An: 0x%.16llx\n", dsisr);
@@ -1107,7 +1118,8 @@ int cxl_native_register_serr_irq(struct cxl_afu *afu)
}
serr = cxl_p1n_read(afu, CXL_PSL_SERR_An);
- serr = (serr & 0x00ffffffffff0000ULL) | (afu->serr_hwirq & 0xffff);
+ if (cxl_is_power8())
+ serr = (serr & 0x00ffffffffff0000ULL) | (afu->serr_hwirq & 0xffff);
cxl_p1n_write(afu, CXL_PSL_SERR_An, serr);
return 0;
diff --git a/drivers/misc/cxl/pci.c b/drivers/misc/cxl/pci.c
index 68362b1..4913142 100644
--- a/drivers/misc/cxl/pci.c
+++ b/drivers/misc/cxl/pci.c
@@ -324,32 +324,33 @@ static void dump_afu_descriptor(struct cxl_afu *afu)
#undef show_reg
}
-#define CAPP_UNIT0_ID 0xBA
-#define CAPP_UNIT1_ID 0XBE
+#define P8_CAPP_UNIT0_ID 0xBA
+#define P8_CAPP_UNIT1_ID 0XBE
static u64 get_capp_unit_id(struct device_node *np)
{
u32 phb_index;
- /*
- * For chips other than POWER8NVL, we only have CAPP 0,
- * irrespective of which PHB is used.
- */
- if (!pvr_version_is(PVR_POWER8NVL))
- return CAPP_UNIT0_ID;
+ if (of_property_read_u32(np, "ibm,phb-index", &phb_index))
+ return 0;
/*
- * For POWER8NVL, assume CAPP 0 is attached to PHB0 and
- * CAPP 1 is attached to PHB1.
+ * POWER 8:
+ * - For chips other than POWER8NVL, we only have CAPP 0,
+ * irrespective of which PHB is used.
+ * - For POWER8NVL, assume CAPP 0 is attached to PHB0 and
+ * CAPP 1 is attached to PHB1.
*/
- if (of_property_read_u32(np, "ibm,phb-index", &phb_index))
- return 0;
+ if (cxl_is_power8()) {
+ if (!pvr_version_is(PVR_POWER8NVL))
+ return P8_CAPP_UNIT0_ID;
- if (phb_index == 0)
- return CAPP_UNIT0_ID;
+ if (phb_index == 0)
+ return P8_CAPP_UNIT0_ID;
- if (phb_index == 1)
- return CAPP_UNIT1_ID;
+ if (phb_index == 1)
+ return P8_CAPP_UNIT1_ID;
+ }
return 0;
}
@@ -968,7 +969,7 @@ static int cxl_afu_descriptor_looks_ok(struct cxl_afu *afu)
}
if (afu->pp_psa && (afu->pp_size < PAGE_SIZE))
- dev_warn(&afu->dev, "AFU uses < PAGE_SIZE per-process PSA!");
+ dev_warn(&afu->dev, "AFU uses pp_size(%#016llx) < PAGE_SIZE per-process PSA!\n", afu->pp_size);
for (i = 0; i < afu->crs_num; i++) {
rc = cxl_ops->afu_cr_read32(afu, i, 0, &val);
@@ -1242,8 +1243,13 @@ int cxl_pci_reset(struct cxl *adapter)
dev_info(&dev->dev, "CXL reset\n");
- /* the adapter is about to be reset, so ignore errors */
- cxl_data_cache_flush(adapter);
+ /*
+ * The adapter is about to be reset, so ignore errors.
+ * Not supported on P9 DD1 but don't forget to enable it
+ * on P9 DD2
+ */
+ if (cxl_is_power8())
+ cxl_data_cache_flush(adapter);
/* pcie_warm_reset requests a fundamental pci reset which includes a
* PERST assert/deassert. PERST triggers a loading of the image
@@ -1373,6 +1379,14 @@ static void cxl_fixup_malformed_tlp(struct cxl *adapter, struct pci_dev *dev)
pci_write_config_dword(dev, aer + PCI_ERR_UNCOR_MASK, data);
}
+static bool cxl_compatible_caia_version(struct cxl *adapter)
+{
+ if (cxl_is_power8() && (adapter->caia_major == 1))
+ return true;
+
+ return false;
+}
+
static int cxl_vsec_looks_ok(struct cxl *adapter, struct pci_dev *dev)
{
if (adapter->vsec_status & CXL_STATUS_SECOND_PORT)
@@ -1383,6 +1397,12 @@ static int cxl_vsec_looks_ok(struct cxl *adapter, struct pci_dev *dev)
return -EINVAL;
}
+ if (!cxl_compatible_caia_version(adapter)) {
+ dev_info(&dev->dev, "Ignoring card. PSL type is not supported "
+ "(caia version: %d)\n", adapter->caia_major);
+ return -ENODEV;
+ }
+
if (!adapter->slices) {
/* Once we support dynamic reprogramming we can use the card if
* it supports loadable AFUs */
@@ -1557,8 +1577,10 @@ static void set_sl_ops(struct cxl *adapter, struct pci_dev *dev)
adapter->native->sl_ops = &xsl_ops;
adapter->min_pe = 1; /* Workaround for CX-4 hardware bug */
} else {
- dev_info(&dev->dev, "Device uses a PSL8\n");
- adapter->native->sl_ops = &psl8_ops;
+ if (cxl_is_power8()) {
+ dev_info(&dev->dev, "Device uses a PSL8\n");
+ adapter->native->sl_ops = &psl8_ops;
+ }
}
}
--
2.7.4
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