[PATCH v1 6/6] UefiPayloadPkg: LinuxBoot: use a text format for the configuration block.


Cheng-Chieh Huang <chengchieh@...>
 

From: Trammell Hudson <hudson@trmm.net>

This adds a text command line for the UefiPayloadPkg that uses
a textual magic number 'LnxBoot1' and a series of white-space
separated key=value[,value...] pairs for the parameters.

The v1 binary configuration structure is used if it is present instead
for backwards compatability.

Currently supported text command line arguments are are:

* `serial=baud,base,width,type,hz,pci`
(only `baud` needs to be specified, the rest have reasonable
defaults)

* `mem=start,end,type`
Types are based on `/sys/firmware/memmaps/*/types`:
1 == "System RAM"
3 == "ACPI Tables"
4 == "ACPI Non-volatile Storage"
5 == "Reserved"

* `ACPI20=base` pointer to RDSP (from `/sys/firmware/efi/systab`)

* `SMBIOS=base` pointer to the SMBIOS table (also from the EFI table)

Signed-off-by: Cheng-Chieh Huang <chengchieh@google.com>
---
UefiPayloadPkg/Include/Linuxboot.h | 17 +-
UefiPayloadPkg/Library/LbParseLib/LbParseLib.c | 252 +++++++++++++++++---
2 files changed, 230 insertions(+), 39 deletions(-)

diff --git a/UefiPayloadPkg/Include/Linuxboot.h b/UefiPayloadPkg/Include/Linuxboot.h
index 34ca18069983..56b39b5a09ff 100644
--- a/UefiPayloadPkg/Include/Linuxboot.h
+++ b/UefiPayloadPkg/Include/Linuxboot.h
@@ -24,8 +24,7 @@ typedef struct MemoryMapEntryStruct {
UINT32 Type;
} MemoryMapEntry;

-typedef struct UefiPayloadConfigStruct {
- UINT64 Version;
+typedef struct {
UINT64 AcpiBase;
UINT64 AcpiSize;
UINT64 SmbiosBase;
@@ -33,10 +32,22 @@ typedef struct UefiPayloadConfigStruct {
SerialPortConfig SerialConfig;
UINT32 NumMemoryMapEntries;
MemoryMapEntry MemoryMapEntries[0];
+} UefiPayloadConfigV1;
+
+typedef struct UefiPayloadConfigStruct {
+ UINT64 Version;
+ union {
+ UefiPayloadConfigV1 v1;
+ struct {
+ char cmdline[0]; // up to 64 KB
+ } v2;
+ } config;
} UefiPayloadConfig;
#pragma pack()

-#define UEFI_PAYLOAD_CONFIG_VERSION 1
+// magic version config is "LnxBoot1"
+#define UEFI_PAYLOAD_CONFIG_VERSION1 1
+#define UEFI_PAYLOAD_CONFIG_VERSION2 0x31746f6f42786e4cULL

#define LINUXBOOT_MEM_RAM 1
#define LINUXBOOT_MEM_DEFAULT 2
diff --git a/UefiPayloadPkg/Library/LbParseLib/LbParseLib.c b/UefiPayloadPkg/Library/LbParseLib/LbParseLib.c
index 34bfb6a1073f..5e68091cac91 100644
--- a/UefiPayloadPkg/Library/LbParseLib/LbParseLib.c
+++ b/UefiPayloadPkg/Library/LbParseLib/LbParseLib.c
@@ -1,13 +1,12 @@
/** @file
- This library will parse the linuxboot table in memory and extract those required
- information.
+ This library will parse the linuxboot table in memory and extract those
+required information.

Copyright (c) 2021, the u-root Authors. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent

**/

-
#include <IndustryStandard/Acpi.h>
#include <IndustryStandard/SmBios.h>
#include <Library/BaseLib.h>
@@ -18,17 +17,42 @@
#include <Library/PcdLib.h>
#include <Linuxboot.h>
#include <Uefi/UefiBaseType.h>
+#include <stdint.h>
+#include <stdlib.h>
+//#include <string.h>
+//#include <ctype.h>
+
+#define strncmp(a, b, n) AsciiStrnCmp((a), (b), (n))
+
+static uint64_t parse_int(const char* s, char** end) {
+ UINT64 x;
+
+ if (s[0] == '0' && s[1] == 'x')
+ AsciiStrHexToUint64S(s, end, &x);
+ else
+ AsciiStrDecimalToUint64S(s, end, &x);
+
+ return x;
+}
+
+static int isspace(const char c) { return c == ' ' || c == '\t' || c == '\n'; }

// Retrieve UefiPayloadConfig from Linuxboot's uefiboot
-UefiPayloadConfig* GetUefiPayLoadConfig() {
- UefiPayloadConfig* config =
+const UefiPayloadConfig* GetUefiPayLoadConfig() {
+ const UefiPayloadConfig* config =
(UefiPayloadConfig*)(UINTN)(PcdGet32(PcdPayloadFdMemBase) - SIZE_64KB);
- if (config->Version != UEFI_PAYLOAD_CONFIG_VERSION) {
- DEBUG((DEBUG_ERROR, "Expect payload config version: %d, but get %d\n",
- UEFI_PAYLOAD_CONFIG_VERSION, config->Version));
- CpuDeadLoop ();
- }
- return config;
+
+ if (config->Version == UEFI_PAYLOAD_CONFIG_VERSION1 ||
+ config->Version == UEFI_PAYLOAD_CONFIG_VERSION2)
+ return config;
+
+ DEBUG((DEBUG_ERROR,
+ "Expect payload config version %016lx or %016lx, but get %016lx\n",
+ UEFI_PAYLOAD_CONFIG_VERSION1, UEFI_PAYLOAD_CONFIG_VERSION2,
+ config->Version));
+ CpuDeadLoop();
+ while (1)
+ ;
}

// Align the address and add memory rang to MemInfoCallback
@@ -54,6 +78,57 @@ void AddMemoryRange(IN BL_MEM_INFO_CALLBACK MemInfoCallback, IN UINTN start,
MemInfoCallback(&MemoryMap, NULL);
}

+const char* cmdline_next(const char* cmdline, const char** option) {
+ // at the end of the string, we're done
+ if (!cmdline || *cmdline == '\0') return NULL;
+
+ // skip any leading whitespace
+ while (isspace(*cmdline)) cmdline++;
+
+ // if we've hit the end of the string, we're done
+ if (*cmdline == '\0') return NULL;
+
+ *option = cmdline;
+
+ // find the end of this option or the string
+ while (!isspace(*cmdline) && *cmdline != '\0') cmdline++;
+
+ // cmdline points to the whitespace or end of string
+ return cmdline;
+}
+
+int cmdline_ints(const char* option, uint64_t args[], int max) {
+ // skip any leading text up to an '='
+ const char* s = option;
+ while (1) {
+ const char c = *s++;
+ if (c == '=') break;
+
+ if (c == '\0' || isspace(c)) {
+ s = option;
+ break;
+ }
+ }
+
+ for (int i = 0; i < max; i++) {
+ char* end;
+ args[i] = parse_int(s, &end);
+
+ // end of string or end of the option?
+ if (*end == '\0' || isspace(*end)) return i + 1;
+
+ // not separator? signal an error if we have consumed any ints,
+ // otherwise return 0 saying that none were found
+ if (*end != ',') return i == 0 ? 0 : -1;
+
+ // skip the , and get the next value
+ s = end + 1;
+ }
+
+ // too many values!
+ return -1;
+}
+
/**
Acquire the memory information from the linuxboot table in memory.

@@ -67,20 +142,50 @@ void AddMemoryRange(IN BL_MEM_INFO_CALLBACK MemInfoCallback, IN UINTN start,
RETURN_STATUS
EFIAPI
ParseMemoryInfo(IN BL_MEM_INFO_CALLBACK MemInfoCallback, IN VOID* Params) {
- UefiPayloadConfig* config;
- int i;
+ const UefiPayloadConfig* config = GetUefiPayLoadConfig();
+ if (!config) {
+ DEBUG(
+ (DEBUG_ERROR, "ParseMemoryInfo: Could not find UEFI Payload config\n"));
+ return RETURN_SUCCESS;
+ }
+
+ if (config->Version == UEFI_PAYLOAD_CONFIG_VERSION1) {
+ const UefiPayloadConfigV1* config1 = &config->config.v1;
+ DEBUG(
+ (DEBUG_INFO, "MemoryMap #entries: %d\n", config1->NumMemoryMapEntries));
+
+ for (int i = 0; i < config1->NumMemoryMapEntries; i++) {
+ const MemoryMapEntry* entry = &config1->MemoryMapEntries[i];
+ DEBUG((DEBUG_INFO, "Start: 0x%lx End: 0x%lx Type:%d\n", entry->Start,
+ entry->End, entry->Type));
+ AddMemoryRange(MemInfoCallback, entry->Start, entry->End, entry->Type);
+ }
+ } else

- config = GetUefiPayLoadConfig();
+ if (config->Version == UEFI_PAYLOAD_CONFIG_VERSION2) {
+ const char* cmdline = config->config.v2.cmdline;
+ const char* option;
+ uint64_t args[3];

- DEBUG((DEBUG_INFO, "MemoryMap #entries: %d\n", config->NumMemoryMapEntries));
+ // look for the mem=start,end,type
+ while ((cmdline = cmdline_next(cmdline, &option))) {
+ if (strncmp(option, "mem=", 4) != 0) continue;

- MemoryMapEntry* entry = &config->MemoryMapEntries[0];
- for (i = 0; i < config->NumMemoryMapEntries; i++) {
- DEBUG((DEBUG_INFO, "Start: 0x%lx End: 0x%lx Type:%d\n", entry->Start,
- entry->End, entry->Type));
- AddMemoryRange(MemInfoCallback, entry->Start, entry->End, entry->Type);
- entry++;
+ if (cmdline_ints(option, args, 3) != 3) {
+ DEBUG((DEBUG_ERROR, "Parse error: '%a'\n", option));
+ continue;
+ }
+
+ const uint64_t start = args[0];
+ const uint64_t end = args[1];
+ const uint64_t type = args[2];
+
+ DEBUG(
+ (DEBUG_INFO, "Start: 0x%lx End: 0x%lx Type:%d\n", start, end, type));
+ AddMemoryRange(MemInfoCallback, start, end, type);
+ }
}
+
return RETURN_SUCCESS;
}

@@ -96,14 +201,52 @@ ParseMemoryInfo(IN BL_MEM_INFO_CALLBACK MemInfoCallback, IN VOID* Params) {
RETURN_STATUS
EFIAPI
ParseSystemTable(OUT SYSTEM_TABLE_INFO* SystemTableInfo) {
- UefiPayloadConfig* config;
+ const UefiPayloadConfig* config = GetUefiPayLoadConfig();
+ if (!config) {
+ DEBUG((DEBUG_ERROR,
+ "ParseSystemTable: Could not find UEFI Payload config\n"));
+ return RETURN_SUCCESS;
+ }

- config = GetUefiPayLoadConfig();
- SystemTableInfo->AcpiTableBase = config->AcpiBase;
- SystemTableInfo->AcpiTableSize = config->AcpiSize;
+ if (config->Version == UEFI_PAYLOAD_CONFIG_VERSION1) {
+ const UefiPayloadConfigV1* config1 = &config->config.v1;
+ SystemTableInfo->AcpiTableBase = config1->AcpiBase;
+ SystemTableInfo->AcpiTableSize = config1->AcpiSize;

- SystemTableInfo->SmbiosTableBase = config->SmbiosBase;
- SystemTableInfo->SmbiosTableSize = config->SmbiosSize;
+ SystemTableInfo->SmbiosTableBase = config1->SmbiosBase;
+ SystemTableInfo->SmbiosTableSize = config1->SmbiosSize;
+ } else
+
+ if (config->Version == UEFI_PAYLOAD_CONFIG_VERSION2) {
+ const char* cmdline = config->config.v2.cmdline;
+ const char* option;
+ uint64_t args[2];
+
+ // look for the acpi config
+ while ((cmdline = cmdline_next(cmdline, &option))) {
+ if (strncmp(option, "ACPI20=", 7) == 0) {
+ const int count = cmdline_ints(option, args, 2);
+ if (count < 0) {
+ DEBUG((DEBUG_ERROR, "Parse error: '%a'\n", option));
+ continue;
+ }
+
+ if (count > 0) SystemTableInfo->AcpiTableBase = args[0];
+ if (count > 1) SystemTableInfo->AcpiTableSize = args[1];
+ }
+
+ if (strncmp(option, "SMBIOS=", 7) == 0) {
+ const int count = cmdline_ints(option, args, 2);
+ if (count < 0) {
+ DEBUG((DEBUG_ERROR, "Parse error: '%a'\n", option));
+ continue;
+ }
+
+ if (count > 0) SystemTableInfo->SmbiosTableBase = args[0];
+ if (count > 1) SystemTableInfo->SmbiosTableSize = args[1];
+ }
+ }
+ }

return RETURN_SUCCESS;
}
@@ -120,15 +263,52 @@ ParseSystemTable(OUT SYSTEM_TABLE_INFO* SystemTableInfo) {
RETURN_STATUS
EFIAPI
ParseSerialInfo(OUT SERIAL_PORT_INFO* SerialPortInfo) {
- UefiPayloadConfig* config;
- config = GetUefiPayLoadConfig();
-
- SerialPortInfo->BaseAddr = config->SerialConfig.BaseAddr;
- SerialPortInfo->RegWidth = config->SerialConfig.RegWidth;
- SerialPortInfo->Type = config->SerialConfig.Type;
- SerialPortInfo->Baud = config->SerialConfig.Baud;
- SerialPortInfo->InputHertz = config->SerialConfig.InputHertz;
- SerialPortInfo->UartPciAddr = config->SerialConfig.UartPciAddr;
+ // fill in some reasonable defaults
+ SerialPortInfo->BaseAddr = 0x3f8;
+ SerialPortInfo->RegWidth = 1;
+ SerialPortInfo->Type = 1; // uefi.SerialPortTypeIO
+ SerialPortInfo->Baud = 115200;
+ SerialPortInfo->InputHertz = 1843200;
+ SerialPortInfo->UartPciAddr = 0;
+
+ const UefiPayloadConfig* config = GetUefiPayLoadConfig();
+ if (!config) {
+ DEBUG((DEBUG_ERROR, "ParseSerialInfo: using default config\n"));
+ return RETURN_SUCCESS;
+ }
+
+ if (config->Version == UEFI_PAYLOAD_CONFIG_VERSION1) {
+ const UefiPayloadConfigV1* config1 = &config->config.v1;
+ SerialPortInfo->BaseAddr = config1->SerialConfig.BaseAddr;
+ SerialPortInfo->RegWidth = config1->SerialConfig.RegWidth;
+ SerialPortInfo->Type = config1->SerialConfig.Type;
+ SerialPortInfo->Baud = config1->SerialConfig.Baud;
+ SerialPortInfo->InputHertz = config1->SerialConfig.InputHertz;
+ SerialPortInfo->UartPciAddr = config1->SerialConfig.UartPciAddr;
+ } else
+
+ if (config->Version == UEFI_PAYLOAD_CONFIG_VERSION2) {
+ const char* cmdline = config->config.v2.cmdline;
+ const char* option;
+ uint64_t args[6] = {};
+
+ while ((cmdline = cmdline_next(cmdline, &option))) {
+ if (strncmp(option, "serial=", 7) != 0) continue;
+
+ const int count = cmdline_ints(option, args, 6);
+ if (count < 0) {
+ DEBUG((DEBUG_ERROR, "Parse error: %a\n", option));
+ continue;
+ }
+
+ if (count > 0) SerialPortInfo->Baud = args[0];
+ if (count > 1) SerialPortInfo->BaseAddr = args[1];
+ if (count > 2) SerialPortInfo->RegWidth = args[2];
+ if (count > 3) SerialPortInfo->Type = args[3];
+ if (count > 4) SerialPortInfo->InputHertz = args[4];
+ if (count > 5) SerialPortInfo->UartPciAddr = args[5];
+ }
+ }

return RETURN_SUCCESS;
}
--
2.32.0.402.g57bb445576-goog

Join devel@edk2.groups.io to automatically receive all group messages.