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path: root/drivers/firmware/efi
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-rw-r--r--drivers/firmware/efi/Kconfig13
-rw-r--r--drivers/firmware/efi/Makefile1
-rw-r--r--drivers/firmware/efi/cper.c15
-rw-r--r--drivers/firmware/efi/efi.c39
-rw-r--r--drivers/firmware/efi/rci2-table.c147
5 files changed, 179 insertions, 36 deletions
diff --git a/drivers/firmware/efi/Kconfig b/drivers/firmware/efi/Kconfig
index d4ea929e8b34..178ee8106828 100644
--- a/drivers/firmware/efi/Kconfig
+++ b/drivers/firmware/efi/Kconfig
@@ -180,6 +180,19 @@ config RESET_ATTACK_MITIGATION
have been evicted, since otherwise it will trigger even on clean
reboots.
+config EFI_RCI2_TABLE
+ bool "EFI Runtime Configuration Interface Table Version 2 Support"
+ help
+ Displays the content of the Runtime Configuration Interface
+ Table version 2 on Dell EMC PowerEdge systems as a binary
+ attribute 'rci2' under /sys/firmware/efi/tables directory.
+
+ RCI2 table contains BIOS HII in XML format and is used to populate
+ BIOS setup page in Dell EMC OpenManage Server Administrator tool.
+ The BIOS setup page contains BIOS tokens which can be configured.
+
+ Say Y here for Dell EMC PowerEdge systems.
+
endmenu
config UEFI_CPER
diff --git a/drivers/firmware/efi/Makefile b/drivers/firmware/efi/Makefile
index d2d0d2030620..4ac2de4dfa72 100644
--- a/drivers/firmware/efi/Makefile
+++ b/drivers/firmware/efi/Makefile
@@ -25,6 +25,7 @@ obj-$(CONFIG_EFI_BOOTLOADER_CONTROL) += efibc.o
obj-$(CONFIG_EFI_TEST) += test/
obj-$(CONFIG_EFI_DEV_PATH_PARSER) += dev-path-parser.o
obj-$(CONFIG_APPLE_PROPERTIES) += apple-properties.o
+obj-$(CONFIG_EFI_RCI2_TABLE) += rci2-table.o
arm-obj-$(CONFIG_EFI) := arm-init.o arm-runtime.o
obj-$(CONFIG_ARM) += $(arm-obj-y)
diff --git a/drivers/firmware/efi/cper.c b/drivers/firmware/efi/cper.c
index 8fa977c7861f..addf0749dd8b 100644
--- a/drivers/firmware/efi/cper.c
+++ b/drivers/firmware/efi/cper.c
@@ -390,6 +390,21 @@ static void cper_print_pcie(const char *pfx, const struct cper_sec_pcie *pcie,
printk(
"%s""bridge: secondary_status: 0x%04x, control: 0x%04x\n",
pfx, pcie->bridge.secondary_status, pcie->bridge.control);
+
+ /* Fatal errors call __ghes_panic() before AER handler prints this */
+ if ((pcie->validation_bits & CPER_PCIE_VALID_AER_INFO) &&
+ (gdata->error_severity & CPER_SEV_FATAL)) {
+ struct aer_capability_regs *aer;
+
+ aer = (struct aer_capability_regs *)pcie->aer_info;
+ printk("%saer_uncor_status: 0x%08x, aer_uncor_mask: 0x%08x\n",
+ pfx, aer->uncor_status, aer->uncor_mask);
+ printk("%saer_uncor_severity: 0x%08x\n",
+ pfx, aer->uncor_severity);
+ printk("%sTLP Header: %08x %08x %08x %08x\n", pfx,
+ aer->header_log.dw0, aer->header_log.dw1,
+ aer->header_log.dw2, aer->header_log.dw3);
+ }
}
static void cper_print_tstamp(const char *pfx,
diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c
index ad3b1f4866b3..8f1ab04f6743 100644
--- a/drivers/firmware/efi/efi.c
+++ b/drivers/firmware/efi/efi.c
@@ -39,11 +39,9 @@ struct efi __read_mostly efi = {
.acpi20 = EFI_INVALID_TABLE_ADDR,
.smbios = EFI_INVALID_TABLE_ADDR,
.smbios3 = EFI_INVALID_TABLE_ADDR,
- .sal_systab = EFI_INVALID_TABLE_ADDR,
.boot_info = EFI_INVALID_TABLE_ADDR,
.hcdp = EFI_INVALID_TABLE_ADDR,
.uga = EFI_INVALID_TABLE_ADDR,
- .uv_systab = EFI_INVALID_TABLE_ADDR,
.fw_vendor = EFI_INVALID_TABLE_ADDR,
.runtime = EFI_INVALID_TABLE_ADDR,
.config_table = EFI_INVALID_TABLE_ADDR,
@@ -57,25 +55,6 @@ struct efi __read_mostly efi = {
};
EXPORT_SYMBOL(efi);
-static unsigned long *efi_tables[] = {
- &efi.mps,
- &efi.acpi,
- &efi.acpi20,
- &efi.smbios,
- &efi.smbios3,
- &efi.sal_systab,
- &efi.boot_info,
- &efi.hcdp,
- &efi.uga,
- &efi.uv_systab,
- &efi.fw_vendor,
- &efi.runtime,
- &efi.config_table,
- &efi.esrt,
- &efi.properties_table,
- &efi.mem_attr_table,
-};
-
struct mm_struct efi_mm = {
.mm_rb = RB_ROOT,
.mm_users = ATOMIC_INIT(2),
@@ -476,7 +455,6 @@ static __initdata efi_config_table_type_t common_tables[] = {
{ACPI_TABLE_GUID, "ACPI", &efi.acpi},
{HCDP_TABLE_GUID, "HCDP", &efi.hcdp},
{MPS_TABLE_GUID, "MPS", &efi.mps},
- {SAL_SYSTEM_TABLE_GUID, "SALsystab", &efi.sal_systab},
{SMBIOS_TABLE_GUID, "SMBIOS", &efi.smbios},
{SMBIOS3_TABLE_GUID, "SMBIOS 3.0", &efi.smbios3},
{UGA_IO_PROTOCOL_GUID, "UGA", &efi.uga},
@@ -487,6 +465,9 @@ static __initdata efi_config_table_type_t common_tables[] = {
{LINUX_EFI_TPM_EVENT_LOG_GUID, "TPMEventLog", &efi.tpm_log},
{LINUX_EFI_TPM_FINAL_LOG_GUID, "TPMFinalLog", &efi.tpm_final_log},
{LINUX_EFI_MEMRESERVE_TABLE_GUID, "MEMRESERVE", &efi.mem_reserve},
+#ifdef CONFIG_EFI_RCI2_TABLE
+ {DELLEMC_EFI_RCI2_TABLE_GUID, NULL, &rci2_table_phys},
+#endif
{NULL_GUID, NULL, NULL},
};
@@ -964,20 +945,6 @@ int efi_status_to_err(efi_status_t status)
return err;
}
-bool efi_is_table_address(unsigned long phys_addr)
-{
- unsigned int i;
-
- if (phys_addr == EFI_INVALID_TABLE_ADDR)
- return false;
-
- for (i = 0; i < ARRAY_SIZE(efi_tables); i++)
- if (*(efi_tables[i]) == phys_addr)
- return true;
-
- return false;
-}
-
static DEFINE_SPINLOCK(efi_mem_reserve_persistent_lock);
static struct linux_efi_memreserve *efi_memreserve_root __ro_after_init;
diff --git a/drivers/firmware/efi/rci2-table.c b/drivers/firmware/efi/rci2-table.c
new file mode 100644
index 000000000000..3e290f96620a
--- /dev/null
+++ b/drivers/firmware/efi/rci2-table.c
@@ -0,0 +1,147 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Export Runtime Configuration Interface Table Version 2 (RCI2)
+ * to sysfs
+ *
+ * Copyright (C) 2019 Dell Inc
+ * by Narendra K <Narendra.K@dell.com>
+ *
+ * System firmware advertises the address of the RCI2 Table via
+ * an EFI Configuration Table entry. This code retrieves the RCI2
+ * table from the address and exports it to sysfs as a binary
+ * attribute 'rci2' under /sys/firmware/efi/tables directory.
+ */
+
+#include <linux/kobject.h>
+#include <linux/device.h>
+#include <linux/sysfs.h>
+#include <linux/efi.h>
+#include <linux/types.h>
+#include <linux/io.h>
+
+#define RCI_SIGNATURE "_RC_"
+
+struct rci2_table_global_hdr {
+ u16 type;
+ u16 resvd0;
+ u16 hdr_len;
+ u8 rci2_sig[4];
+ u16 resvd1;
+ u32 resvd2;
+ u32 resvd3;
+ u8 major_rev;
+ u8 minor_rev;
+ u16 num_of_structs;
+ u32 rci2_len;
+ u16 rci2_chksum;
+} __packed;
+
+static u8 *rci2_base;
+static u32 rci2_table_len;
+unsigned long rci2_table_phys __ro_after_init = EFI_INVALID_TABLE_ADDR;
+
+static ssize_t raw_table_read(struct file *file, struct kobject *kobj,
+ struct bin_attribute *attr, char *buf,
+ loff_t pos, size_t count)
+{
+ memcpy(buf, attr->private + pos, count);
+ return count;
+}
+
+static BIN_ATTR(rci2, S_IRUSR, raw_table_read, NULL, 0);
+
+static u16 checksum(void)
+{
+ u8 len_is_odd = rci2_table_len % 2;
+ u32 chksum_len = rci2_table_len;
+ u16 *base = (u16 *)rci2_base;
+ u8 buf[2] = {0};
+ u32 offset = 0;
+ u16 chksum = 0;
+
+ if (len_is_odd)
+ chksum_len -= 1;
+
+ while (offset < chksum_len) {
+ chksum += *base;
+ offset += 2;
+ base++;
+ }
+
+ if (len_is_odd) {
+ buf[0] = *(u8 *)base;
+ chksum += *(u16 *)(buf);
+ }
+
+ return chksum;
+}
+
+int __init efi_rci2_sysfs_init(void)
+{
+ struct kobject *tables_kobj;
+ int ret = -ENOMEM;
+
+ rci2_base = memremap(rci2_table_phys,
+ sizeof(struct rci2_table_global_hdr),
+ MEMREMAP_WB);
+ if (!rci2_base) {
+ pr_debug("RCI2 table init failed - could not map RCI2 table\n");
+ goto err;
+ }
+
+ if (strncmp(rci2_base +
+ offsetof(struct rci2_table_global_hdr, rci2_sig),
+ RCI_SIGNATURE, 4)) {
+ pr_debug("RCI2 table init failed - incorrect signature\n");
+ ret = -ENODEV;
+ goto err_unmap;
+ }
+
+ rci2_table_len = *(u32 *)(rci2_base +
+ offsetof(struct rci2_table_global_hdr,
+ rci2_len));
+
+ memunmap(rci2_base);
+
+ if (!rci2_table_len) {
+ pr_debug("RCI2 table init failed - incorrect table length\n");
+ goto err;
+ }
+
+ rci2_base = memremap(rci2_table_phys, rci2_table_len, MEMREMAP_WB);
+ if (!rci2_base) {
+ pr_debug("RCI2 table - could not map RCI2 table\n");
+ goto err;
+ }
+
+ if (checksum() != 0) {
+ pr_debug("RCI2 table - incorrect checksum\n");
+ ret = -ENODEV;
+ goto err_unmap;
+ }
+
+ tables_kobj = kobject_create_and_add("tables", efi_kobj);
+ if (!tables_kobj) {
+ pr_debug("RCI2 table - tables_kobj creation failed\n");
+ goto err_unmap;
+ }
+
+ bin_attr_rci2.size = rci2_table_len;
+ bin_attr_rci2.private = rci2_base;
+ ret = sysfs_create_bin_file(tables_kobj, &bin_attr_rci2);
+ if (ret != 0) {
+ pr_debug("RCI2 table - rci2 sysfs bin file creation failed\n");
+ kobject_del(tables_kobj);
+ kobject_put(tables_kobj);
+ goto err_unmap;
+ }
+
+ return 0;
+
+ err_unmap:
+ memunmap(rci2_base);
+ err:
+ pr_debug("RCI2 table - sysfs initialization failed\n");
+ return ret;
+}
+late_initcall(efi_rci2_sysfs_init);
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-05 12:27:24 +0300