> Is drivers/peci/device.c: peci_get_cpu_id() specific to Intel CPUs? It seems
> to retrieve a value in the format of CPUID(EAX=1).EAX that would apply to
> both Intel and AMD. Yet I don't see any checking of vendor id before looking
> at the model id.
Some web wearching indicates that PECI is an Intel specific protocol, so
no need for vendor checks.
I've re-worked the peci patches (combining the core and hwmon bits) to
switch from separate "family" and "model" fields and checks to using
the same x86_vfm combined value.
The peci patch is included below. But you can see it in context in:
git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux.git new_families_v5_wip
The x86 build of these bits works. But I don't have cross-compile
enviroment to check non-X86 builds. Also no way to test.
-Tony
---
>From 34cc093cbebaf596a52b123c4f8c3ef2df45a240 Mon Sep 17 00:00:00 2001
From: Tony Luck <tony.luck@xxxxxxxxx>
Date: Thu, 25 Apr 2024 12:27:39 -0700
Subject: [PATCH] peci, hwmon: Switch to new Intel CPU model defines
Update peci subsystem to use the same vendor-family-model
combined definition that core x86 code uses.
Signed-off-by: Tony Luck <tony.luck@xxxxxxxxx>
---
include/linux/peci-cpu.h | 24 ++++++++++++++++++++++++
include/linux/peci.h | 3 +--
drivers/peci/internal.h | 3 +--
drivers/hwmon/peci/cputemp.c | 8 ++++----
drivers/peci/core.c | 5 ++---
drivers/peci/cpu.c | 21 +++++++--------------
drivers/peci/device.c | 3 +--
7 files changed, 40 insertions(+), 27 deletions(-)
diff --git a/include/linux/peci-cpu.h b/include/linux/peci-cpu.h
index ff8ae9c26c80..601cdd086bf6 100644
--- a/include/linux/peci-cpu.h
+++ b/include/linux/peci-cpu.h
@@ -6,6 +6,30 @@
#include <linux/types.h>
+/* Copied from x86 <asm/processor.h> */
+#define X86_VENDOR_INTEL 0
+
+/* Copied from x86 <asm/cpu_device_id.h> */
+#define VFM_MODEL_BIT 0
+#define VFM_FAMILY_BIT 8
+#define VFM_VENDOR_BIT 16
+#define VFM_RSVD_BIT 24
+
+#define VFM_MODEL_MASK GENMASK(VFM_FAMILY_BIT - 1, VFM_MODEL_BIT)
+#define VFM_FAMILY_MASK GENMASK(VFM_VENDOR_BIT - 1, VFM_FAMILY_BIT)
+#define VFM_VENDOR_MASK GENMASK(VFM_RSVD_BIT - 1, VFM_VENDOR_BIT)
+
+#define VFM_MODEL(vfm) (((vfm) & VFM_MODEL_MASK) >> VFM_MODEL_BIT)
+#define VFM_FAMILY(vfm) (((vfm) & VFM_FAMILY_MASK) >> VFM_FAMILY_BIT)
+#define VFM_VENDOR(vfm) (((vfm) & VFM_VENDOR_MASK) >> VFM_VENDOR_BIT)
+
+#define VFM_MAKE(_vendor, _family, _model) ( \
+ ((_model) << VFM_MODEL_BIT) | \
+ ((_family) << VFM_FAMILY_BIT) | \
+ ((_vendor) << VFM_VENDOR_BIT) \
+)
+/* End of copied code */
+
#include "../../arch/x86/include/asm/intel-family.h"
#define PECI_PCS_PKG_ID 0 /* Package Identifier Read */
diff --git a/include/linux/peci.h b/include/linux/peci.h
index 9b3d36aff431..0db8b5dd09d9 100644
--- a/include/linux/peci.h
+++ b/include/linux/peci.h
@@ -74,8 +74,7 @@ static inline struct peci_controller *to_peci_controller(void *d)
struct peci_device {
struct device dev;
struct {
- u16 family;
- u8 model;
+ u32 x86_vfm;
u8 peci_revision;
u8 socket_id;
} info;
diff --git a/drivers/peci/internal.h b/drivers/peci/internal.h
index 9d75ea54504c..7ead53e5598f 100644
--- a/drivers/peci/internal.h
+++ b/drivers/peci/internal.h
@@ -71,8 +71,7 @@ struct peci_request *peci_xfer_ep_mmio64_readl(struct peci_device *device, u8 ba
*/
struct peci_device_id {
const void *data;
- u16 family;
- u8 model;
+ u32 x86_vfm;
};
extern struct device_type peci_device_type;
diff --git a/drivers/hwmon/peci/cputemp.c b/drivers/hwmon/peci/cputemp.c
index a812c15948d9..5a682195b98f 100644
--- a/drivers/hwmon/peci/cputemp.c
+++ b/drivers/hwmon/peci/cputemp.c
@@ -360,10 +360,10 @@ static int init_core_mask(struct peci_cputemp *priv)
int ret;
/* Get the RESOLVED_CORES register value */
- switch (peci_dev->info.model) {
- case INTEL_FAM6_ICELAKE_X:
- case INTEL_FAM6_ICELAKE_D:
- case INTEL_FAM6_SAPPHIRERAPIDS_X:
+ switch (peci_dev->info.x86_vfm) {
+ case INTEL_ICELAKE_X:
+ case INTEL_ICELAKE_D:
+ case INTEL_SAPPHIRERAPIDS_X:
ret = peci_ep_pci_local_read(peci_dev, 0, reg->bus, reg->dev,
reg->func, reg->offset + 4, &data);
if (ret)
diff --git a/drivers/peci/core.c b/drivers/peci/core.c
index 0f83a9c6093b..b2d7adf05ba0 100644
--- a/drivers/peci/core.c
+++ b/drivers/peci/core.c
@@ -163,9 +163,8 @@ EXPORT_SYMBOL_NS_GPL(devm_peci_controller_add, PECI);
static const struct peci_device_id *
peci_bus_match_device_id(const struct peci_device_id *id, struct peci_device *device)
{
- while (id->family != 0) {
- if (id->family == device->info.family &&
- id->model == device->info.model)
+ while (id->x86_vfm != 0) {
+ if (id->x86_vfm == device->info.x86_vfm)
return id;
id++;
}
diff --git a/drivers/peci/cpu.c b/drivers/peci/cpu.c
index bd990acd92b8..152bbd8e717a 100644
--- a/drivers/peci/cpu.c
+++ b/drivers/peci/cpu.c
@@ -294,38 +294,31 @@ peci_cpu_probe(struct peci_device *device, const struct peci_device_id *id)
static const struct peci_device_id peci_cpu_device_ids[] = {
{ /* Haswell Xeon */
- .family = 6,
- .model = INTEL_FAM6_HASWELL_X,
+ .x86_vfm = INTEL_HASWELL_X,
.data = "hsx",
},
{ /* Broadwell Xeon */
- .family = 6,
- .model = INTEL_FAM6_BROADWELL_X,
+ .x86_vfm = INTEL_BROADWELL_X,
.data = "bdx",
},
{ /* Broadwell Xeon D */
- .family = 6,
- .model = INTEL_FAM6_BROADWELL_D,
+ .x86_vfm = INTEL_BROADWELL_D,
.data = "bdxd",
},
{ /* Skylake Xeon */
- .family = 6,
- .model = INTEL_FAM6_SKYLAKE_X,
+ .x86_vfm = INTEL_SKYLAKE_X,
.data = "skx",
},
{ /* Icelake Xeon */
- .family = 6,
- .model = INTEL_FAM6_ICELAKE_X,
+ .x86_vfm = INTEL_ICELAKE_X,
.data = "icx",
},
{ /* Icelake Xeon D */
- .family = 6,
- .model = INTEL_FAM6_ICELAKE_D,
+ .x86_vfm = INTEL_ICELAKE_D,
.data = "icxd",
},
{ /* Sapphire Rapids Xeon */
- .family = 6,
- .model = INTEL_FAM6_SAPPHIRERAPIDS_X,
+ .x86_vfm = INTEL_SAPPHIRERAPIDS_X,
.data = "spr",
},
{ }
diff --git a/drivers/peci/device.c b/drivers/peci/device.c
index e6b0bffb14f4..5eb57b503c81 100644
--- a/drivers/peci/device.c
+++ b/drivers/peci/device.c
@@ -100,8 +100,7 @@ static int peci_device_info_init(struct peci_device *device)
if (ret)
return ret;
- device->info.family = peci_x86_cpu_family(cpu_id);
- device->info.model = peci_x86_cpu_model(cpu_id);
+ device->info.x86_vfm = IFM(peci_x86_cpu_family(cpu_id), peci_x86_cpu_model(cpu_id));
ret = peci_get_revision(device, &revision);
if (ret)
--
2.44.0
