commit d8515a6c83c8511879c0b697f9f76cf3dcb1f694
author Rui Zhang <ruizhan@google.com> Tue Mar 24 16:46:44 2020 -0700
committer ruizhan <ruizhan@google.com> Fri Mar 27 17:43:34 2020 +0000
tree 9018fe2ddc18794bd40a9c3b887df3b8918d7a26
parent 382d2a0ee6470de075c6fdc16eafc63b9f0b4fb9

tools: add configuration to enable PPC host memory access

Tested: Successfully updated on a Zaius (PPC platform) using ipmilpc

Change-Id: Ic744f6e0ca40df7aa3d5f914e2baef58114fa71b
Signed-off-by: Rui Zhang <ruizhan@google.com>

README.md

diff --git a/README.md b/README.md
index 10e69ae..ea03fc0 100644
--- a/README.md
+++ b/README.md
@@ -209,6 +209,12 @@
 ------------------------ | -------
 `--enable-update-status` | Enable use of update status file.
 
+If you would like to use host memory access to update on a PPC platform, this configuration option needs to be enabled.
+
+Option          | Meaning
+--------------- | -------
+`--enable-ppc`  | Enable PPC host memory access.
+
 ### Internal Configuration Details
 
 The following variables can be set to whatever you wish, however they have

configure.ac

diff --git a/configure.ac b/configure.ac
index da2b0a9..4863dc1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -145,6 +145,15 @@
 
 # Configurability
 
+# Enable ppc host memory access
+AC_ARG_ENABLE([ppc],
+    AS_HELP_STRING([--enable-ppc],
+                   [Enable ppc host memory access.]))
+AM_CONDITIONAL([ENABLE_PPC], [test "x$enable_ppc" = "xyes"])
+AS_IF([test "x$enable_ppc" = "xyes"], [
+    AX_APPEND_COMPILE_FLAGS([-DENABLE_PPC], [CXXFLAGS])
+])
+
 # Enable the reboot update mechanism
 AC_ARG_ENABLE([reboot-update],
     AS_HELP_STRING([--enable-reboot-update],

tools/io.hpp

diff --git a/tools/io.hpp b/tools/io.hpp
index 48e70bf..8760aec 100644
--- a/tools/io.hpp
+++ b/tools/io.hpp
@@ -71,7 +71,7 @@
 class PpcMemDevice : public HostIoInterface
 {
   public:
-    explicit PpcMemDevice(const std::string ppcMemPath,
+    explicit PpcMemDevice(const std::string& ppcMemPath,
                           const internal::Sys* sys = &internal::sys_impl) :
         ppcMemPath(ppcMemPath),
         sys(sys)

tools/main.cpp

diff --git a/tools/main.cpp b/tools/main.cpp
index 9746a6d..207fcdd 100644
--- a/tools/main.cpp
+++ b/tools/main.cpp
@@ -210,7 +210,12 @@
 
         auto ipmi = ipmiblob::IpmiHandler::CreateIpmiHandler();
         ipmiblob::BlobHandler blob(std::move(ipmi));
+#ifdef ENABLE_PPC
+        const std::string ppcMemPath = "/sys/kernel/debug/powerpc/lpc/fw";
+        host_tool::PpcMemDevice devmem(ppcMemPath);
+#else
         host_tool::DevMemDevice devmem;
+#endif
         host_tool::PciUtilImpl pci;
         host_tool::ProgressStdoutIndicator progress;