lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20231018231624.1044633-13-david.e.box@linux.intel.com>
Date:   Wed, 18 Oct 2023 16:16:19 -0700
From:   "David E. Box" <david.e.box@...ux.intel.com>
To:     linux-kernel@...r.kernel.org, platform-driver-x86@...r.kernel.org,
        ilpo.jarvinen@...ux.intel.com, rajvi.jingar@...ux.intel.com
Subject: [PATCH V4 12/17] platform/x86/intel/pmc: Find and register PMC telemetry entries

The PMC SSRAM device contains counters that are structured in Intel
Platform Monitoring Technology (PMT) telemetry regions. Look for and
register these telemetry regions from the driver so that they may be read
using the Intel PMT ABI.

Signed-off-by: David E. Box <david.e.box@...ux.intel.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
---
V4 - no change

V3 - no change

V2 - no change

 drivers/platform/x86/intel/pmc/Kconfig      |  1 +
 drivers/platform/x86/intel/pmc/core_ssram.c | 52 +++++++++++++++++++++
 2 files changed, 53 insertions(+)

diff --git a/drivers/platform/x86/intel/pmc/Kconfig b/drivers/platform/x86/intel/pmc/Kconfig
index b526597e4deb..d2f651fbec2c 100644
--- a/drivers/platform/x86/intel/pmc/Kconfig
+++ b/drivers/platform/x86/intel/pmc/Kconfig
@@ -7,6 +7,7 @@ config INTEL_PMC_CORE
 	tristate "Intel PMC Core driver"
 	depends on PCI
 	depends on ACPI
+	depends on INTEL_PMT_TELEMETRY
 	help
 	  The Intel Platform Controller Hub for Intel Core SoCs provides access
 	  to Power Management Controller registers via various interfaces. This
diff --git a/drivers/platform/x86/intel/pmc/core_ssram.c b/drivers/platform/x86/intel/pmc/core_ssram.c
index ccb3748dbed9..936aa0d5f452 100644
--- a/drivers/platform/x86/intel/pmc/core_ssram.c
+++ b/drivers/platform/x86/intel/pmc/core_ssram.c
@@ -13,6 +13,8 @@
 #include <linux/io-64-nonatomic-lo-hi.h>
 
 #include "core.h"
+#include "../vsec.h"
+#include "../pmt/telemetry.h"
 
 #define SSRAM_HDR_SIZE		0x100
 #define SSRAM_PWRM_OFFSET	0x14
@@ -22,6 +24,49 @@
 #define SSRAM_IOE_OFFSET	0x68
 #define SSRAM_DEVID_OFFSET	0x70
 
+static void
+pmc_add_pmt(struct pmc_dev *pmcdev, u64 ssram_base, void __iomem *ssram)
+{
+	struct pci_dev *pcidev = pmcdev->ssram_pcidev;
+	struct intel_vsec_platform_info info = {};
+	struct intel_vsec_header *headers[2] = {};
+	struct intel_vsec_header header;
+	void __iomem *dvsec;
+	u32 dvsec_offset;
+	u32 table, hdr;
+
+	ssram = ioremap(ssram_base, SSRAM_HDR_SIZE);
+	if (!ssram)
+		return;
+
+	dvsec_offset = readl(ssram + SSRAM_DVSEC_OFFSET);
+	iounmap(ssram);
+
+	dvsec = ioremap(ssram_base + dvsec_offset, SSRAM_DVSEC_SIZE);
+	if (!dvsec)
+		return;
+
+	hdr = readl(dvsec + PCI_DVSEC_HEADER1);
+	header.id = readw(dvsec + PCI_DVSEC_HEADER2);
+	header.rev = PCI_DVSEC_HEADER1_REV(hdr);
+	header.length = PCI_DVSEC_HEADER1_LEN(hdr);
+	header.num_entries = readb(dvsec + INTEL_DVSEC_ENTRIES);
+	header.entry_size = readb(dvsec + INTEL_DVSEC_SIZE);
+
+	table = readl(dvsec + INTEL_DVSEC_TABLE);
+	header.tbir = INTEL_DVSEC_TABLE_BAR(table);
+	header.offset = INTEL_DVSEC_TABLE_OFFSET(table);
+	iounmap(dvsec);
+
+	headers[0] = &header;
+	info.caps = VSEC_CAP_TELEMETRY;
+	info.headers = headers;
+	info.base_addr = ssram_base;
+	info.parent = &pmcdev->pdev->dev;
+
+	intel_vsec_register(pcidev, &info);
+}
+
 static const struct pmc_reg_map *pmc_core_find_regmap(struct pmc_info *list, u16 devid)
 {
 	for (; list->map; ++list)
@@ -96,6 +141,9 @@ pmc_core_get_secondary_pmc(struct pmc_dev *pmcdev, int pmc_idx, u32 offset)
 	pwrm_base = get_base(secondary_ssram, SSRAM_PWRM_OFFSET);
 	devid = readw(secondary_ssram + SSRAM_DEVID_OFFSET);
 
+	/* Find and register and PMC telemetry entries */
+	pmc_add_pmt(pmcdev, ssram_base, main_ssram);
+
 	map = pmc_core_find_regmap(pmcdev->regmap_list, devid);
 	if (!map)
 		return -ENODEV;
@@ -124,6 +172,9 @@ pmc_core_get_primary_pmc(struct pmc_dev *pmcdev)
 	pwrm_base = get_base(ssram, SSRAM_PWRM_OFFSET);
 	devid = readw(ssram + SSRAM_DEVID_OFFSET);
 
+	/* Find and register and PMC telemetry entries */
+	pmc_add_pmt(pmcdev, ssram_base, ssram);
+
 	map = pmc_core_find_regmap(pmcdev->regmap_list, devid);
 	if (!map)
 		return -ENODEV;
@@ -163,3 +214,4 @@ int pmc_core_ssram_init(struct pmc_dev *pmcdev)
 
 	return ret;
 }
+MODULE_IMPORT_NS(INTEL_VSEC);
-- 
2.34.1

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ