Move HOMER BAR to Secure Memory in SMF Mode

This commits enables HOMER BAR to point to the top
of the secure memory on SMF-enabled systems. Consequently,
the HOMER image and hostboot reserved memory will
be moved to the secure memory if SMF is enabled.

Change-Id: I37c7527b06688a41e57f14b4107ff53a507ffae8
RTC: 198825
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/66702
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Tested-by: Jenkins OP Build CI <op-jenkins+hostboot@us.ibm.com>
Reviewed-by: Nicholas E. Bofferding <bofferdn@us.ibm.com>
Tested-by: Jenkins OP HW <op-hw-jenkins+hostboot@us.ibm.com>
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>

1 files changed, 216 insertions, 0 deletions

diff --git a/src/usr/isteps/mem_utils.C b/src/usr/isteps/mem_utils.C
new file mode 100644
index 000000000..89961ef5e
--- /dev/null
+++ b/src/usr/isteps/mem_utils.C
@@ -0,0 +1,216 @@
+/* IBM_PROLOG_BEGIN_TAG                                                   */
+/* This is an automatically generated prolog.                             */
+/*                                                                        */
+/* $Source: src/usr/isteps/mem_utils.C $                                  */
+/*                                                                        */
+/* OpenPOWER HostBoot Project                                             */
+/*                                                                        */
+/* Contributors Listed Below - COPYRIGHT 2018                             */
+/* [+] International Business Machines Corp.                              */
+/*                                                                        */
+/*                                                                        */
+/* Licensed under the Apache License, Version 2.0 (the "License");        */
+/* you may not use this file except in compliance with the License.       */
+/* You may obtain a copy of the License at                                */
+/*                                                                        */
+/*     http://www.apache.org/licenses/LICENSE-2.0                         */
+/*                                                                        */
+/* Unless required by applicable law or agreed to in writing, software    */
+/* distributed under the License is distributed on an "AS IS" BASIS,      */
+/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or        */
+/* implied. See the License for the specific language governing           */
+/* permissions and limitations under the License.                         */
+/*                                                                        */
+/* IBM_PROLOG_END_TAG                                                     */
+#include <isteps/mem_utils.H>
+#include <targeting/common/target.H>
+#include <targeting/common/utilFilter.H>
+#include <errl/hberrltypes.H>
+#include <secureboot/smf_utils.H>
+#include <stdint.h>
+
+namespace ISTEP
+{
+
+/**
+ * @brief Utility function to obtain the highest known address in the system
+ */
+uint64_t get_top_mem_addr()
+{
+    uint64_t l_top_addr = 0;
+
+    do
+    {
+        // Get all functional proc chip targets
+        TARGETING::TargetHandleList l_cpuTargetList;
+        TARGETING::getAllChips(l_cpuTargetList, TARGETING::TYPE_PROC);
+        assert(l_cpuTargetList.size() != 0, "Empty proc list returned!");
+
+        for (auto l_pProc : l_cpuTargetList)
+        {
+            l_top_addr = std::max(l_top_addr, get_top_mem_addr(l_pProc));
+        }
+
+    } while(0);
+
+    return l_top_addr;
+}
+
+/**
+ * @brief Utility function to obtain the highest known address in a given proc
+ */
+uint64_t get_top_mem_addr(const TARGETING::Target* i_proc)
+{
+    uint64_t l_top_addr = 0;
+
+    assert(i_proc, "nullptr passed to get_top_mem_addr");
+    assert(i_proc->getAttr<TARGETING::ATTR_TYPE>() == TARGETING::TYPE_PROC,
+           "Invalid target passed to get_top_mem_addr (need TYPE_PROC)");
+
+    //Not checking success here as fail results in no change to
+    // top_addr
+    uint64_t l_mem_bases[8] = {0,};
+    uint64_t l_mem_sizes[8] = {0,};
+    i_proc->tryGetAttr<TARGETING::ATTR_PROC_MEM_BASES>(l_mem_bases);
+    i_proc->tryGetAttr<TARGETING::ATTR_PROC_MEM_SIZES>(l_mem_sizes);
+
+    for (size_t i=0; i< 8; i++)
+    {
+        if(l_mem_sizes[i]) //non zero means that there is memory present
+        {
+            l_top_addr = std::max(l_top_addr,
+                                l_mem_bases[i] + l_mem_sizes[i]);
+        }
+    }
+
+    return l_top_addr;
+}
+
+/**
+ * @brief Utility function to obtain the lowest known address in the system
+ */
+uint64_t get_bottom_mem_addr()
+{
+    uint64_t l_bottom_addr = UINT64_MAX;
+
+    do
+    {
+        // Get all functional proc chip targets
+        TARGETING::TargetHandleList l_cpuTargetList;
+        TARGETING::getAllChips(l_cpuTargetList, TARGETING::TYPE_PROC);
+
+        for (const auto l_pProc : l_cpuTargetList)
+        {
+            l_bottom_addr =std::min(l_bottom_addr,get_bottom_mem_addr(l_pProc));
+        }
+    }while(0);
+
+    // There's no reason the lowest address should be the largest
+    // 64 bit value
+    assert(l_bottom_addr < UINT64_MAX,
+           "Lowest address is maximum 64-bit value, probably have no memory");
+
+    return l_bottom_addr;
+}
+
+/**
+ * @brief Utility function to obtain the lowest known address in a given proc
+ */
+uint64_t get_bottom_mem_addr(const TARGETING::Target* i_proc)
+{
+    uint64_t l_bottom_addr = UINT64_MAX;
+
+    assert(i_proc, "nullptr passed to get_bottom_mem_addr");
+    assert(i_proc->getAttr<TARGETING::ATTR_TYPE>() == TARGETING::TYPE_PROC,
+           "Invalid target passed to get_bottom_mem_addr (need TYPE_PROC)");
+
+    uint64_t l_mem_bases[8] = {};
+    uint64_t l_mem_sizes[8] = {};
+    assert(i_proc->tryGetAttr<TARGETING::ATTR_PROC_MEM_BASES>(l_mem_bases),
+           "Unable to get ATTR_PROC_MEM_BASES attribute");
+
+    assert(i_proc->tryGetAttr<TARGETING::ATTR_PROC_MEM_SIZES>(l_mem_sizes),
+           "Unable to get ATTR_PROC_MEM_SIZES attribute");
+
+    for (size_t i=0; i< 8; i++)
+    {
+        if(l_mem_sizes[i]) //non zero means that there is memory present
+        {
+            l_bottom_addr = std::min(l_bottom_addr, l_mem_bases[i]);
+        }
+    }
+
+    return l_bottom_addr;
+}
+
+/**
+ * @brief Utility function to obtain the highest known SMF base address on
+ *        the system
+ */
+uint64_t get_top_smf_mem_addr()
+{
+    uint64_t l_top_addr = 0;
+    // Get all functional proc chip targets
+    TARGETING::TargetHandleList l_cpuTargetList;
+    TARGETING::getAllChips(l_cpuTargetList, TARGETING::TYPE_PROC);
+    assert(l_cpuTargetList.size() != 0, "Empty proc list returned!");
+
+    for (const auto l_pProc : l_cpuTargetList)
+    {
+        l_top_addr = std::max(l_top_addr, get_top_smf_mem_addr(l_pProc));
+    }
+
+    return l_top_addr;
+}
+
+/**
+ * @brief Utility function to obtain the highest SMF base address on the
+ *        given proc
+ */
+uint64_t get_top_smf_mem_addr(const TARGETING::Target* i_proc)
+{
+    uint64_t l_top_addr = 0;
+
+    assert(i_proc, "nullptr passed to get_top_smf_mem_addr");
+    assert(i_proc->getAttr<TARGETING::ATTR_TYPE>() == TARGETING::TYPE_PROC,
+           "Invalid target passed to get_top_smf_mem_addr (need TYPE_PROC)");
+
+    auto l_smf_bar =
+                   i_proc->getAttr<TARGETING::ATTR_PROC_SMF_BAR_BASE_ADDR>();
+    auto l_smf_size =
+                   i_proc->getAttr<TARGETING::ATTR_PROC_SMF_BAR_SIZE>();
+
+    l_top_addr = l_smf_bar + l_smf_size;
+
+    return l_top_addr;
+}
+
+/**
+ * @brief Utility function to fetch the top of the HOMER memory;
+ *        when SMF is enabled, the function will return the highest
+ *        available SMF BAR on a proc, so the top of the HOMER memory
+ *        will be pointed to the top of SMF memory, and all of the
+ *        contents will be put in secure memory space. When SMF is not
+ *        enabled, the function will return the highest known address
+ *        on the system.
+ */
+uint64_t get_top_homer_mem_addr()
+{
+    uint64_t l_top_homer_addr = 0;
+    do
+    {
+        if(SECUREBOOT::SMF::isSmfEnabled())
+        {
+            l_top_homer_addr = get_top_smf_mem_addr();
+        }
+        else
+        {
+            l_top_homer_addr = get_top_mem_addr();
+        }
+
+    }while(0);
+
+    return l_top_homer_addr;
+}
+
+} // namespace ISTEP