Merge tag 'tpmdd-v6.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd

Pull tpm fixes from Jarkko Sakkinen.

Mostly interrupt storm fixes, with some other minor changes.

* tag 'tpmdd-v6.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd:
  tpm,tpm_tis: Disable interrupts after 1000 unhandled IRQs
  tpm/tpm_tis: Disable interrupts for Lenovo L590 devices
  tpm: Do not remap from ACPI resources again for Pluton TPM
  tpm/tpm_tis: Disable interrupts for Framework Laptop Intel 13th gen
  tpm/tpm_tis: Disable interrupts for Framework Laptop Intel 12th gen
  security: keys: Modify mismatched function name
  tpm: return false from tpm_amd_is_rng_defective on non-x86 platforms
  keys: Fix linking a duplicate key to a keyring's assoc_array
  tpm: tis_i2c: Limit write bursts to I2C_SMBUS_BLOCK_MAX (32) bytes
  tpm: tis_i2c: Limit read bursts to I2C_SMBUS_BLOCK_MAX (32) bytes
  tpm_tis_spi: Release chip select when flow control fails
  tpm: tpm_tis: Disable interrupts *only* for AEON UPX-i11
  tpm: tpm_vtpm_proxy: fix a race condition in /dev/vtpmx creation

Author: torvalds

drivers/char/tpm/tpm-chip.c

@@ -518,6 +518,7 @@ static int tpm_add_legacy_sysfs(struct tpm_chip *chip)
  * 6.x.y.z series: 6.0.18.6 +
  * 3.x.y.z series: 3.57.y.5 +
  */
+#ifdef CONFIG_X86
 static bool tpm_amd_is_rng_defective(struct tpm_chip *chip)
 {
 	u32 val1, val2;
@@ -566,6 +567,12 @@ static bool tpm_amd_is_rng_defective(struct tpm_chip *chip)
 
 	return true;
 }
+#else
+static inline bool tpm_amd_is_rng_defective(struct tpm_chip *chip)
+{
+	return false;
+}
+#endif /* CONFIG_X86 */
 
 static int tpm_hwrng_read(struct hwrng *rng, void *data, size_t max, bool wait)
 {

drivers/char/tpm/tpm_crb.c

@@ -563,15 +563,18 @@ static int crb_map_io(struct acpi_device *device, struct crb_priv *priv,
 	u32 rsp_size;
 	int ret;
 
-	INIT_LIST_HEAD(&acpi_resource_list);
-	ret = acpi_dev_get_resources(device, &acpi_resource_list,
-				     crb_check_resource, iores_array);
-	if (ret < 0)
-		return ret;
-	acpi_dev_free_resource_list(&acpi_resource_list);
-
-	/* Pluton doesn't appear to define ACPI memory regions */
+	/*
+	 * Pluton sometimes does not define ACPI memory regions.
+	 * Mapping is then done in crb_map_pluton
+	 */
 	if (priv->sm != ACPI_TPM2_COMMAND_BUFFER_WITH_PLUTON) {
+		INIT_LIST_HEAD(&acpi_resource_list);
+		ret = acpi_dev_get_resources(device, &acpi_resource_list,
+					     crb_check_resource, iores_array);
+		if (ret < 0)
+			return ret;
+		acpi_dev_free_resource_list(&acpi_resource_list);
+
 		if (resource_type(iores_array) != IORESOURCE_MEM) {
 			dev_err(dev, FW_BUG "TPM2 ACPI table does not define a memory resource\n");
 			return -EINVAL;

drivers/char/tpm/tpm_tis.c

@@ -114,6 +114,22 @@ static int tpm_tis_disable_irq(const struct dmi_system_id *d)
 }
 
 static const struct dmi_system_id tpm_tis_dmi_table[] = {
+	{
+		.callback = tpm_tis_disable_irq,
+		.ident = "Framework Laptop (12th Gen Intel Core)",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Framework"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Laptop (12th Gen Intel Core)"),
+		},
+	},
+	{
+		.callback = tpm_tis_disable_irq,
+		.ident = "Framework Laptop (13th Gen Intel Core)",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Framework"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Laptop (13th Gen Intel Core)"),
+		},
+	},
 	{
 		.callback = tpm_tis_disable_irq,
 		.ident = "ThinkPad T490s",
@@ -138,11 +154,20 @@ static const struct dmi_system_id tpm_tis_dmi_table[] = {
 			DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad L490"),
 		},
 	},
+	{
+		.callback = tpm_tis_disable_irq,
+		.ident = "ThinkPad L590",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+			DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad L590"),
+		},
+	},
 	{
 		.callback = tpm_tis_disable_irq,
 		.ident = "UPX-TGL",
 		.matches = {
 			DMI_MATCH(DMI_SYS_VENDOR, "AAEON"),
+			DMI_MATCH(DMI_PRODUCT_VERSION, "UPX-TGL"),
 		},
 	},
 	{}

drivers/char/tpm/tpm_tis_core.c

@@ -24,9 +24,12 @@
 #include <linux/wait.h>
 #include <linux/acpi.h>
 #include <linux/freezer.h>
+#include <linux/dmi.h>
 #include "tpm.h"
 #include "tpm_tis_core.h"
 
+#define TPM_TIS_MAX_UNHANDLED_IRQS	1000
+
 static void tpm_tis_clkrun_enable(struct tpm_chip *chip, bool value);
 
 static bool wait_for_tpm_stat_cond(struct tpm_chip *chip, u8 mask,
@@ -468,25 +471,29 @@ static int tpm_tis_send_data(struct tpm_chip *chip, const u8 *buf, size_t len)
 	return rc;
 }
 
-static void disable_interrupts(struct tpm_chip *chip)
+static void __tpm_tis_disable_interrupts(struct tpm_chip *chip)
+{
+	struct tpm_tis_data *priv = dev_get_drvdata(&chip->dev);
+	u32 int_mask = 0;
+
+	tpm_tis_read32(priv, TPM_INT_ENABLE(priv->locality), &int_mask);
+	int_mask &= ~TPM_GLOBAL_INT_ENABLE;
+	tpm_tis_write32(priv, TPM_INT_ENABLE(priv->locality), int_mask);
+
+	chip->flags &= ~TPM_CHIP_FLAG_IRQ;
+}
+
+static void tpm_tis_disable_interrupts(struct tpm_chip *chip)
 {
 	struct tpm_tis_data *priv = dev_get_drvdata(&chip->dev);
-	u32 intmask;
-	int rc;
 
 	if (priv->irq == 0)
 		return;
 
-	rc = tpm_tis_read32(priv, TPM_INT_ENABLE(priv->locality), &intmask);
-	if (rc < 0)
-		intmask = 0;
-
-	intmask &= ~TPM_GLOBAL_INT_ENABLE;
-	rc = tpm_tis_write32(priv, TPM_INT_ENABLE(priv->locality), intmask);
+	__tpm_tis_disable_interrupts(chip);
 
 	devm_free_irq(chip->dev.parent, priv->irq, chip);
 	priv->irq = 0;
-	chip->flags &= ~TPM_CHIP_FLAG_IRQ;
 }
 
 /*
@@ -552,7 +559,7 @@ static int tpm_tis_send(struct tpm_chip *chip, u8 *buf, size_t len)
 	if (!test_bit(TPM_TIS_IRQ_TESTED, &priv->flags))
 		tpm_msleep(1);
 	if (!test_bit(TPM_TIS_IRQ_TESTED, &priv->flags))
-		disable_interrupts(chip);
+		tpm_tis_disable_interrupts(chip);
 	set_bit(TPM_TIS_IRQ_TESTED, &priv->flags);
 	return rc;
 }
@@ -752,6 +759,57 @@ static bool tpm_tis_req_canceled(struct tpm_chip *chip, u8 status)
 	return status == TPM_STS_COMMAND_READY;
 }
 
+static irqreturn_t tpm_tis_revert_interrupts(struct tpm_chip *chip)
+{
+	struct tpm_tis_data *priv = dev_get_drvdata(&chip->dev);
+	const char *product;
+	const char *vendor;
+
+	dev_warn(&chip->dev, FW_BUG
+		 "TPM interrupt storm detected, polling instead\n");
+
+	vendor = dmi_get_system_info(DMI_SYS_VENDOR);
+	product = dmi_get_system_info(DMI_PRODUCT_VERSION);
+
+	if (vendor && product) {
+		dev_info(&chip->dev,
+			"Consider adding the following entry to tpm_tis_dmi_table:\n");
+		dev_info(&chip->dev, "\tDMI_SYS_VENDOR: %s\n", vendor);
+		dev_info(&chip->dev, "\tDMI_PRODUCT_VERSION: %s\n", product);
+	}
+
+	if (tpm_tis_request_locality(chip, 0) != 0)
+		return IRQ_NONE;
+
+	__tpm_tis_disable_interrupts(chip);
+	tpm_tis_relinquish_locality(chip, 0);
+
+	schedule_work(&priv->free_irq_work);
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t tpm_tis_update_unhandled_irqs(struct tpm_chip *chip)
+{
+	struct tpm_tis_data *priv = dev_get_drvdata(&chip->dev);
+	irqreturn_t irqret = IRQ_HANDLED;
+
+	if (!(chip->flags & TPM_CHIP_FLAG_IRQ))
+		return IRQ_HANDLED;
+
+	if (time_after(jiffies, priv->last_unhandled_irq + HZ/10))
+		priv->unhandled_irqs = 1;
+	else
+		priv->unhandled_irqs++;
+
+	priv->last_unhandled_irq = jiffies;
+
+	if (priv->unhandled_irqs > TPM_TIS_MAX_UNHANDLED_IRQS)
+		irqret = tpm_tis_revert_interrupts(chip);
+
+	return irqret;
+}
+
 static irqreturn_t tis_int_handler(int dummy, void *dev_id)
 {
 	struct tpm_chip *chip = dev_id;
@@ -761,10 +819,10 @@ static irqreturn_t tis_int_handler(int dummy, void *dev_id)
 
 	rc = tpm_tis_read32(priv, TPM_INT_STATUS(priv->locality), &interrupt);
 	if (rc < 0)
-		return IRQ_NONE;
+		goto err;
 
 	if (interrupt == 0)
-		return IRQ_NONE;
+		goto err;
 
 	set_bit(TPM_TIS_IRQ_TESTED, &priv->flags);
 	if (interrupt & TPM_INTF_DATA_AVAIL_INT)
@@ -780,10 +838,13 @@ static irqreturn_t tis_int_handler(int dummy, void *dev_id)
 	rc = tpm_tis_write32(priv, TPM_INT_STATUS(priv->locality), interrupt);
 	tpm_tis_relinquish_locality(chip, 0);
 	if (rc < 0)
-		return IRQ_NONE;
+		goto err;
 
 	tpm_tis_read32(priv, TPM_INT_STATUS(priv->locality), &interrupt);
 	return IRQ_HANDLED;
+
+err:
+	return tpm_tis_update_unhandled_irqs(chip);
 }
 
 static void tpm_tis_gen_interrupt(struct tpm_chip *chip)
@@ -804,6 +865,15 @@ static void tpm_tis_gen_interrupt(struct tpm_chip *chip)
 		chip->flags &= ~TPM_CHIP_FLAG_IRQ;
 }
 
+static void tpm_tis_free_irq_func(struct work_struct *work)
+{
+	struct tpm_tis_data *priv = container_of(work, typeof(*priv), free_irq_work);
+	struct tpm_chip *chip = priv->chip;
+
+	devm_free_irq(chip->dev.parent, priv->irq, chip);
+	priv->irq = 0;
+}
+
 /* Register the IRQ and issue a command that will cause an interrupt. If an
  * irq is seen then leave the chip setup for IRQ operation, otherwise reverse
  * everything and leave in polling mode. Returns 0 on success.
@@ -816,6 +886,7 @@ static int tpm_tis_probe_irq_single(struct tpm_chip *chip, u32 intmask,
 	int rc;
 	u32 int_status;
 
+	INIT_WORK(&priv->free_irq_work, tpm_tis_free_irq_func);
 
 	rc = devm_request_threaded_irq(chip->dev.parent, irq, NULL,
 				       tis_int_handler, IRQF_ONESHOT | flags,
@@ -918,6 +989,7 @@ void tpm_tis_remove(struct tpm_chip *chip)
 		interrupt = 0;
 
 	tpm_tis_write32(priv, reg, ~TPM_GLOBAL_INT_ENABLE & interrupt);
+	flush_work(&priv->free_irq_work);
 
 	tpm_tis_clkrun_enable(chip, false);
 
@@ -1021,6 +1093,7 @@ int tpm_tis_core_init(struct device *dev, struct tpm_tis_data *priv, int irq,
 	chip->timeout_b = msecs_to_jiffies(TIS_TIMEOUT_B_MAX);
 	chip->timeout_c = msecs_to_jiffies(TIS_TIMEOUT_C_MAX);
 	chip->timeout_d = msecs_to_jiffies(TIS_TIMEOUT_D_MAX);
+	priv->chip = chip;
 	priv->timeout_min = TPM_TIMEOUT_USECS_MIN;
 	priv->timeout_max = TPM_TIMEOUT_USECS_MAX;
 	priv->phy_ops = phy_ops;
@@ -1179,7 +1252,7 @@ int tpm_tis_core_init(struct device *dev, struct tpm_tis_data *priv, int irq,
 			rc = tpm_tis_request_locality(chip, 0);
 			if (rc < 0)
 				goto out_err;
-			disable_interrupts(chip);
+			tpm_tis_disable_interrupts(chip);
 			tpm_tis_relinquish_locality(chip, 0);
 		}
 	}

drivers/char/tpm/tpm_tis_core.h

@@ -91,11 +91,15 @@ enum tpm_tis_flags {
 };
 
 struct tpm_tis_data {
+	struct tpm_chip *chip;
 	u16 manufacturer_id;
 	struct mutex locality_count_mutex;
 	unsigned int locality_count;
 	int locality;
 	int irq;
+	struct work_struct free_irq_work;
+	unsigned long last_unhandled_irq;
+	unsigned int unhandled_irqs;
 	unsigned int int_mask;
 	unsigned long flags;
 	void __iomem *ilb_base_addr;

drivers/char/tpm/tpm_tis_i2c.c

@@ -189,21 +189,28 @@ static int tpm_tis_i2c_read_bytes(struct tpm_tis_data *data, u32 addr, u16 len,
 	int ret;
 
 	for (i = 0; i < TPM_RETRY; i++) {
-		/* write register */
-		msg.len = sizeof(reg);
-		msg.buf = &reg;
-		msg.flags = 0;
-		ret = tpm_tis_i2c_retry_transfer_until_ack(data, &msg);
-		if (ret < 0)
-			return ret;
-
-		/* read data */
-		msg.buf = result;
-		msg.len = len;
-		msg.flags = I2C_M_RD;
-		ret = tpm_tis_i2c_retry_transfer_until_ack(data, &msg);
-		if (ret < 0)
-			return ret;
+		u16 read = 0;
+
+		while (read < len) {
+			/* write register */
+			msg.len = sizeof(reg);
+			msg.buf = &reg;
+			msg.flags = 0;
+			ret = tpm_tis_i2c_retry_transfer_until_ack(data, &msg);
+			if (ret < 0)
+				return ret;
+
+			/* read data */
+			msg.buf = result + read;
+			msg.len = len - read;
+			msg.flags = I2C_M_RD;
+			if (msg.len > I2C_SMBUS_BLOCK_MAX)
+				msg.len = I2C_SMBUS_BLOCK_MAX;
+			ret = tpm_tis_i2c_retry_transfer_until_ack(data, &msg);
+			if (ret < 0)
+				return ret;
+			read += msg.len;
+		}
 
 		ret = tpm_tis_i2c_sanity_check_read(reg, len, result);
 		if (ret == 0)
@@ -223,19 +230,27 @@ static int tpm_tis_i2c_write_bytes(struct tpm_tis_data *data, u32 addr, u16 len,
 	struct i2c_msg msg = { .addr = phy->i2c_client->addr };
 	u8 reg = tpm_tis_i2c_address_to_register(addr);
 	int ret;
+	u16 wrote = 0;
 
 	if (len > TPM_BUFSIZE - 1)
 		return -EIO;
 
-	/* write register and data in one go */
 	phy->io_buf[0] = reg;
-	memcpy(phy->io_buf + sizeof(reg), value, len);
-
-	msg.len = sizeof(reg) + len;
 	msg.buf = phy->io_buf;
-	ret = tpm_tis_i2c_retry_transfer_until_ack(data, &msg);
-	if (ret < 0)
-		return ret;
+	while (wrote < len) {
+		/* write register and data in one go */
+		msg.len = sizeof(reg) + len - wrote;
+		if (msg.len > I2C_SMBUS_BLOCK_MAX)
+			msg.len = I2C_SMBUS_BLOCK_MAX;
+
+		memcpy(phy->io_buf + sizeof(reg), value + wrote,
+		       msg.len - sizeof(reg));
+
+		ret = tpm_tis_i2c_retry_transfer_until_ack(data, &msg);
+		if (ret < 0)
+			return ret;
+		wrote += msg.len - sizeof(reg);
+	}
 
 	return 0;
 }

drivers/char/tpm/tpm_tis_spi_main.c

@@ -136,6 +136,14 @@ int tpm_tis_spi_transfer(struct tpm_tis_data *data, u32 addr, u16 len,
 	}
 
 exit:
+	if (ret < 0) {
+		/* Deactivate chip select */
+		memset(&spi_xfer, 0, sizeof(spi_xfer));
+		spi_message_init(&m);
+		spi_message_add_tail(&spi_xfer, &m);
+		spi_sync_locked(phy->spi_device, &m);
+	}
+
 	spi_bus_unlock(phy->spi_device->master);
 	return ret;
 }