* [PATCH v7 1/4] Self Save: Introducing Support for SPR Self Save
2020-04-16 7:53 [PATCH v7 0/4] Support for Self Save API in OPAL Pratik Rajesh Sampat
@ 2020-04-16 7:53 ` Pratik Rajesh Sampat
2020-04-16 7:53 ` [PATCH v7 2/4] Self save API integration Pratik Rajesh Sampat
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: Pratik Rajesh Sampat @ 2020-04-16 7:53 UTC (permalink / raw)
To: linux-kernel, linuxppc-dev, mpe, skiboot, oohall, ego, linuxram,
pratik.r.sampat, psampat
From: Prem Shanker Jha <premjha2@in.ibm.com>
The commit is a merger of commits that makes the following changes:
1. Commit fixes some issues with code found during integration test
- replacement of addi with xor instruction during self save API.
- fixing instruction generation for MFMSR during self save
- data struct updates in STOP API
- error RC updates for hcode image build
- HOMER parser updates.
- removed self save support for URMOR and HRMOR
- code changes for compilation with OPAL
- populating CME Image header with unsecure HOMER address.
Key_Cronus_Test=PM_REGRESS
Change-Id: I7cedcc466267c4245255d8d75c01ed695e316720
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/66580
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Tested-by: HWSV CI <hwsv-ci+hostboot@us.ibm.com>
Tested-by: PPE CI <ppe-ci+hostboot@us.ibm.com>
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Tested-by: Cronus HW CI <cronushw-ci+hostboot@us.ibm.com>
Tested-by: Hostboot CI <hostboot-ci+hostboot@us.ibm.com>
Reviewed-by: Gregory S. Still <stillgs@us.ibm.com>
Reviewed-by: RAHUL BATRA <rbatra@us.ibm.com>
Reviewed-by: Jennifer A. Stofer <stofer@us.ibm.com>
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/66587
Reviewed-by: Christian R. Geddes <crgeddes@us.ibm.com>
Signed-off-by: Prem Shanker Jha <premjha2@in.ibm.com>
Signed-off-by: Akshay Adiga <akshay.adiga@linux.vnet.ibm.com>
Signed-off-by: Pratik Rajesh Sampat <psampat@linux.ibm.com>
2. The commit also incorporates changes that make STOP API project
agnostic changes include defining wrapper functions which call legacy
API. It also adds duplicate enum members which start with prefix PROC
instead of P9.
Key_Cronus_Test=PM_REGRESS
Change-Id: If87970f3e8cf9b507f33eb1be249e03eb3836a5e
RTC: 201128
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/71307
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Tested-by: Hostboot CI <hostboot-ci+hostboot@us.ibm.com>
Tested-by: Cronus HW CI <cronushw-ci+hostboot@us.ibm.com>
Reviewed-by: RANGANATHPRASAD G. BRAHMASAMUDRA <prasadbgr@in.ibm.com>
Reviewed-by: Gregory S. Still <stillgs@us.ibm.com>
Reviewed-by: Jennifer A Stofer <stofer@us.ibm.com>
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/71314
Tested-by: Jenkins OP Build CI <op-jenkins+hostboot@us.ibm.com>
Tested-by: Jenkins OP HW <op-hw-jenkins+hostboot@us.ibm.com>
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>
Signed-off-by: Prem Shanker Jha <premjha2@in.ibm.com>
Signed-off-by: Pratik Rajesh Sampat <psampat@linux.ibm.com>
---
include/p9_stop_api.H | 79 +-
libpore/p9_cpu_reg_restore_instruction.H | 4 +
libpore/p9_stop_api.C | 954 +++++++++++++----------
libpore/p9_stop_api.H | 115 ++-
libpore/p9_stop_data_struct.H | 4 +-
libpore/p9_stop_util.H | 7 +-
6 files changed, 721 insertions(+), 442 deletions(-)
diff --git a/include/p9_stop_api.H b/include/p9_stop_api.H
index 79abd000..9d3bc1e5 100644
--- a/include/p9_stop_api.H
+++ b/include/p9_stop_api.H
@@ -63,6 +63,26 @@ typedef enum
P9_STOP_SPR_PMCR = 884, // core register
P9_STOP_SPR_HID = 1008, // core register
P9_STOP_SPR_MSR = 2000, // thread register
+
+ //enum members which are project agnostic
+ PROC_STOP_SPR_DAWR = 180, // thread register
+ PROC_STOP_SPR_CIABR = 187, // thread register
+ PROC_STOP_SPR_DAWRX = 188, // thread register
+ PROC_STOP_SPR_HSPRG0 = 304, // thread register
+ PROC_STOP_SPR_HRMOR = 313, // core register
+ PROC_STOP_SPR_LPCR = 318, // thread register
+ PROC_STOP_SPR_HMEER = 337, // core register
+ PROC_STOP_SPR_PTCR = 464, // core register
+ PROC_STOP_SPR_USPRG0 = 496, // thread register
+ PROC_STOP_SPR_USPRG1 = 497, // thread register
+ PROC_STOP_SPR_URMOR = 505, // core register
+ PROC_STOP_SPR_SMFCTRL = 511, // thread register
+ PROC_STOP_SPR_LDBAR = 850, // thread register
+ PROC_STOP_SPR_PSSCR = 855, // thread register
+ PROC_STOP_SPR_PMCR = 884, // core register
+ PROC_STOP_SPR_HID = 1008, // core register
+ PROC_STOP_SPR_MSR = 2000, // thread register
+
} CpuReg_t;
/**
@@ -85,6 +105,8 @@ typedef enum
STOP_SAVE_SCOM_ENTRY_UPDATE_FAILED = 12,
STOP_SAVE_INVALID_FUSED_CORE_STATUS = 13,
STOP_SAVE_FAIL = 14, // for internal failure within firmware.
+ STOP_SAVE_SPR_ENTRY_MISSING = 15,
+ STOP_SAVE_SPR_BIT_POS_RESERVE = 16,
} StopReturnCode_t;
/**
@@ -101,7 +123,20 @@ typedef enum
P9_STOP_SCOM_RESET = 6,
P9_STOP_SCOM_OR_APPEND = 7,
P9_STOP_SCOM_AND_APPEND = 8,
- P9_STOP_SCOM_OP_MAX = 9
+ P9_STOP_SCOM_OP_MAX = 9,
+
+ //enum members which are project agnostic
+ PROC_STOP_SCOM_OP_MIN = 0,
+ PROC_STOP_SCOM_APPEND = 1,
+ PROC_STOP_SCOM_REPLACE = 2,
+ PROC_STOP_SCOM_OR = 3,
+ PROC_STOP_SCOM_AND = 4,
+ PROC_STOP_SCOM_NOOP = 5,
+ PROC_STOP_SCOM_RESET = 6,
+ PROC_STOP_SCOM_OR_APPEND = 7,
+ PROC_STOP_SCOM_AND_APPEND = 8,
+ PROC_STOP_SCOM_OP_MAX = 9,
+
} ScomOperation_t;
/**
@@ -114,9 +149,49 @@ typedef enum
P9_STOP_SECTION_EQ_SCOM = 2,
P9_STOP_SECTION_L2 = 3,
P9_STOP_SECTION_L3 = 4,
- P9_STOP_SECTION_MAX = 5
+ P9_STOP_SECTION_MAX = 5,
+
+ //enum members which are project agnostic
+ PROC_STOP_SECTION_MIN = 0,
+ PROC_STOP_SECTION_CORE_SCOM = 1,
+ PROC_STOP_SECTION_EQ_SCOM = 2,
+ PROC_STOP_SECTION_L2 = 3,
+ PROC_STOP_SECTION_L3 = 4,
+ PROC_STOP_SECTION_MAX = 5,
+
} ScomSection_t;
+
+
+/**
+ * @brief List of major incompatibilities between API version.
+ * @note STOP APIs assumes a specific HOMER layout, certain
+ * level of CME-SGPE hcode and certain version of self-save restore
+ * binary. A mismatch can break STOP function.
+ */
+
+/**
+ * @brief Summarizes bit position allocated to SPRs in save bit mask vector.
+ */
+typedef enum
+{
+ BIT_POS_CIABR = 0,
+ BIT_POS_DAWR = 1,
+ BIT_POS_DAWRX = 2,
+ BIT_POS_HSPRG0 = 3,
+ BIT_POS_LDBAR = 4,
+ BIT_POS_LPCR = 5,
+ BIT_POS_PSSCR = 6,
+ BIT_POS_MSR = 7,
+ BIT_POS_HID = 21,
+ BIT_POS_HMEER = 22,
+ BIT_POS_PMCR = 23,
+ BIT_POS_PTCR = 24,
+ BIT_POS_SMFCTRL = 28,
+ BIT_POS_USPRG0 = 29,
+ BIT_POS_USPRG1 = 30,
+} SprBitPositionList_t;
+
#ifdef __cplusplus
extern "C" {
#endif
diff --git a/libpore/p9_cpu_reg_restore_instruction.H b/libpore/p9_cpu_reg_restore_instruction.H
index cf00ff5e..d69a4212 100644
--- a/libpore/p9_cpu_reg_restore_instruction.H
+++ b/libpore/p9_cpu_reg_restore_instruction.H
@@ -62,6 +62,10 @@ enum
MTSPR_CONST1 = 467,
MTMSRD_CONST1 = 178,
MFSPR_CONST = 339,
+ BLR_INST = 0x4e800020,
+ MTSPR_BASE_OPCODE = 0x7c0003a6,
+ MFSPR_BASE_OPCODE = 0x7c0002a6,
+ ATTN_OPCODE = 0x00000200,
OPCODE_18 = 18,
SELF_SAVE_FUNC_ADD = 0x2300,
SELF_SAVE_OFFSET = 0x180,
diff --git a/libpore/p9_stop_api.C b/libpore/p9_stop_api.C
index 33aaf788..2d9bb549 100644
--- a/libpore/p9_stop_api.C
+++ b/libpore/p9_stop_api.C
@@ -54,33 +54,33 @@ namespace stopImageSection
const StopSprReg_t g_sprRegister[] =
{
- { P9_STOP_SPR_CIABR, true, 0 },
- { P9_STOP_SPR_DAWR, true, 1 },
- { P9_STOP_SPR_DAWRX, true, 2 },
- { P9_STOP_SPR_HSPRG0, true, 3 },
- { P9_STOP_SPR_LDBAR, true, 4, },
- { P9_STOP_SPR_LPCR, true, 5 },
- { P9_STOP_SPR_PSSCR, true, 6 },
- { P9_STOP_SPR_MSR, true, 7 },
- { P9_STOP_SPR_HRMOR, false, 20 },
- { P9_STOP_SPR_HID, false, 21 },
- { P9_STOP_SPR_HMEER, false, 22 },
- { P9_STOP_SPR_PMCR, false, 23 },
- { P9_STOP_SPR_PTCR, false, 24 },
- { P9_STOP_SPR_SMFCTRL, true, 28 },
- { P9_STOP_SPR_USPRG0, true, 29 },
- { P9_STOP_SPR_USPRG1, true, 30 },
- { P9_STOP_SPR_URMOR, false, 31 },
+ { P9_STOP_SPR_CIABR, true, 0 },
+ { P9_STOP_SPR_DAWR, true, 1 },
+ { P9_STOP_SPR_DAWRX, true, 2 },
+ { P9_STOP_SPR_HSPRG0, true, 3 },
+ { P9_STOP_SPR_LDBAR, true, 4, },
+ { P9_STOP_SPR_LPCR, true, 5 },
+ { P9_STOP_SPR_PSSCR, true, 6 },
+ { P9_STOP_SPR_MSR, true, 7 },
+ { P9_STOP_SPR_HRMOR, false, 255 },
+ { P9_STOP_SPR_HID, false, 21 },
+ { P9_STOP_SPR_HMEER, false, 22 },
+ { P9_STOP_SPR_PMCR, false, 23 },
+ { P9_STOP_SPR_PTCR, false, 24 },
+ { P9_STOP_SPR_SMFCTRL, true, 28 },
+ { P9_STOP_SPR_USPRG0, true, 29 },
+ { P9_STOP_SPR_USPRG1, true, 30 },
+ { P9_STOP_SPR_URMOR, false, 255 },
};
-const uint32_t MAX_SPR_SUPPORTED = 17;
+const uint32_t MAX_SPR_SUPPORTED = 17;
const uint32_t LEGACY_CORE_SCOM_SUPPORTED = 15;
const uint32_t LEGACY_QUAD_SCOM_SUPPORTED = 63;
//-----------------------------------------------------------------------------
/**
- * @brief vaildated input arguments passed to p9_stop_save_cpureg_control.
+ * @brief validated input arguments passed to p9_stop_save_cpureg_control.
* @param[in] i_pImage point to start of HOMER
* @param[in] i_coreId id of the core
* @param[in] i_threadId id of the thread
@@ -255,7 +255,7 @@ STATIC uint32_t getOriInstruction( const uint16_t i_Rs, const uint16_t i_Ra,
*/
STATIC uint32_t genKeyForSprLookup( const CpuReg_t i_regId )
{
- return getOriInstruction( 0, 0, (uint16_t) i_regId );
+ return getOriInstruction( 24, 0, (uint16_t) i_regId );
}
//-----------------------------------------------------------------------------
@@ -330,7 +330,7 @@ STATIC uint32_t getMtsprInstruction( const uint16_t i_Rs, const uint16_t i_Spr )
*/
STATIC uint32_t getMfmsrInstruction( const uint16_t i_Rt )
{
- uint32_t mfmsrInstOpcode = ((OPCODE_31 << 26) | (i_Rt << 21) | (MFMSR_CONST));
+ uint32_t mfmsrInstOpcode = ((OPCODE_31 << 26) | (i_Rt << 21) | ((MFMSR_CONST)<< 1));
return SWIZZLE_4_BYTE(mfmsrInstOpcode);
}
@@ -361,8 +361,13 @@ STATIC uint32_t getRldicrInstruction( const uint16_t i_Ra, const uint16_t i_Rs,
STATIC uint32_t getMfsprInstruction( const uint16_t i_Rt, const uint16_t i_sprNum )
{
- uint32_t mfsprInstOpcode = 0;
- mfsprInstOpcode = (( OPCODE_31 << 26 ) | ( i_Rt << 21 ) | ( i_sprNum << 11 ) | ( MFSPR_CONST << 1 ));
+ uint32_t mfsprInstOpcode = 0;
+ uint32_t temp = (( i_sprNum & 0x03FF ) << 11);
+ mfsprInstOpcode = (uint8_t)i_Rt << 21;
+ mfsprInstOpcode |= (( temp & 0x0000F800 ) << 5);
+ mfsprInstOpcode |= (( temp & 0x001F0000 ) >> 5);
+ mfsprInstOpcode |= MFSPR_BASE_OPCODE;
+
return SWIZZLE_4_BYTE(mfsprInstOpcode);
}
@@ -615,14 +620,14 @@ STATIC StopReturnCode_t getSprRegIndexAdjustment( const uint32_t i_saveMaskPos,
do
{
- if( (( i_saveMaskPos >= SPR_BIT_POS_8 ) && ( i_saveMaskPos <= SPR_BIT_POS_19 )) ||
+ if( (( i_saveMaskPos >= SPR_BIT_POS_8 ) && ( i_saveMaskPos <= SPR_BIT_POS_20 )) ||
(( i_saveMaskPos >= SPR_BIT_POS_25 ) && ( i_saveMaskPos <= SPR_BIT_POS_27 )) )
{
l_rc = STOP_SAVE_SPR_BIT_POS_RESERVE;
break;
}
- if( (i_saveMaskPos > SPR_BIT_POS_19) && (i_saveMaskPos < SPR_BIT_POS_25 ) )
+ if( (i_saveMaskPos > SPR_BIT_POS_20) && (i_saveMaskPos < SPR_BIT_POS_25) )
{
*i_sprAdjIndex = 12;
}
@@ -646,138 +651,9 @@ StopReturnCode_t p9_stop_save_cpureg( void* const i_pImage,
const uint64_t i_regData,
const uint64_t i_pir )
{
- StopReturnCode_t l_rc = STOP_SAVE_SUCCESS; // procedure return code
- HomerSection_t* chipHomer = NULL;
- SmfHomerSection_t* smfChipHomer = NULL;
-
- do
- {
- uint32_t threadId = 0;
- uint32_t coreId = 0;
- uint32_t lookUpKey = 0;
- void* pSprEntryLocation = NULL; // an offset w.r.t. to start of image
- void* pThreadLocation = NULL;
- bool threadScopeReg = false;
- uint8_t l_urmorFix = false;
- uint64_t l_sprValue = 0;
- uint8_t l_selfRestVer = 0;
-
- MY_INF(">> p9_stop_save_cpureg" );
-
- l_rc = getCoreAndThread( i_pImage, i_pir, &coreId, &threadId );
-
- if( l_rc )
- {
- MY_ERR("Failed to determine Core Id and Thread Id from PIR 0x%016llx",
- i_pir);
- break;
- }
-
- MY_INF( " PIR 0x%016llx coreId %d threadid %d "
- " registerId %d", i_pir, coreId,
- threadId, i_regId );
-
- // First of all let us validate all input arguments.
- l_rc = validateSprImageInputs( i_pImage,
- i_regId,
- coreId,
- &threadId,
- &threadScopeReg );
-
- if( l_rc )
- {
- // Error: bad argument traces out error code
- MY_ERR("Bad input argument rc %d", l_rc );
-
- break;
- }
-
- l_urmorFix = *(uint8_t*)((uint8_t*)i_pImage + CPMR_HOMER_OFFSET + CPMR_URMOR_FIX_BYTE);
- l_selfRestVer = *(uint8_t *)((uint8_t *)i_pImage + CPMR_HOMER_OFFSET + CPMR_SELF_RESTORE_VER_BYTE );
-
- if( l_selfRestVer )
- {
- smfChipHomer = ( SmfHomerSection_t*)i_pImage;
-
- if( threadScopeReg )
- {
- pThreadLocation =
- &(smfChipHomer->iv_coreThreadRestore[coreId].iv_threadRestoreArea[threadId][0]);
- }
- else
- {
- pThreadLocation =
- &(smfChipHomer->iv_coreThreadRestore[coreId].iv_coreRestoreArea[0]);
- }
- }
- else //Old fips or OPAL release that doesn't support SMF
- {
- chipHomer = (HomerSection_t*)i_pImage;
-
- if( threadScopeReg )
- {
- pThreadLocation =
- &(chipHomer->iv_coreThreadRestore[coreId][threadId].iv_threadArea[0]);
- }
- else
- {
- pThreadLocation =
- &(chipHomer->iv_coreThreadRestore[coreId][threadId].iv_coreArea[0]);
- }
- }
-
- if( ( SWIZZLE_4_BYTE(BLR_INST) == *(uint32_t*)pThreadLocation ) ||
- ( SWIZZLE_4_BYTE(ATTN_OPCODE) == *(uint32_t*) pThreadLocation ) )
- {
- // table for given core id doesn't exit. It needs to be
- // defined.
- pSprEntryLocation = pThreadLocation;
- }
- else
- {
- // an SPR restore section for given core already exists
- lookUpKey = genKeyForSprLookup( i_regId );
- l_rc = lookUpSprInImage( (uint32_t*)pThreadLocation,
- lookUpKey,
- threadScopeReg,
- &pSprEntryLocation,
- l_selfRestVer );
- }
-
- if( l_rc )
- {
- MY_ERR("Invalid or corrupt SPR entry. CoreId 0x%08x threadId ",
- "0x%08x regId 0x%08x lookUpKey 0x%08x pThreadLocation 0x%08x"
- , coreId, threadId, i_regId, lookUpKey, pThreadLocation );
- break;
- }
-
- if( ( P9_STOP_SPR_URMOR == i_regId ) && ( l_urmorFix ) )
- {
- l_sprValue = i_regData - URMOR_CORRECTION;
- }
- else
- {
- l_sprValue = i_regData;
- }
-
- l_rc = updateSprEntryInImage( (uint32_t*) pSprEntryLocation,
- i_regId,
- l_sprValue,
- UPDATE_SPR_ENTRY );
-
- if( l_rc )
- {
- MY_ERR( " Failed to update the SPR entry of PIR 0x%08x reg"
- "0x%08x", i_pir, i_regId );
- break;
- }
-
- }
- while(0);
+ MY_INF(">> p9_stop_save_cpureg" );
- MY_INF("<< p9_stop_save_cpureg" );
- return l_rc;
+ return proc_stop_save_cpureg( i_pImage, i_regId, i_regData, i_pir );
}
//-----------------------------------------------------------------------------
@@ -1003,103 +879,334 @@ StopReturnCode_t p9_stop_save_scom( void* const i_pImage,
const ScomOperation_t i_operation,
const ScomSection_t i_section )
{
- StopReturnCode_t l_rc = STOP_SAVE_SUCCESS;
- uint32_t entryLimit = 0;
- uint8_t chipletId = 0;
- uint32_t nopInst = 0;
- uint32_t index = 0;
- uint32_t imageVer = 0;
- uint32_t entrySwzHeader = 0;
- uint32_t l_maxScomRestoreEntry = 0;
- ScomEntry_t* pScomEntry = NULL;
- ScomEntry_t* pEntryLocation = NULL;
- ScomEntry_t* pNopLocation = NULL;
- ScomEntry_t* pEditScomHeader = NULL;
- StopCacheSection_t* pStopCacheScomStart = NULL;
- ScomEntry_t* pTableEndLocationtable = NULL;
- uint32_t swizzleAddr;
- uint64_t swizzleData;
- uint32_t swizzleAttn;
- uint32_t swizzleBlr = SWIZZLE_4_BYTE(BLR_INST);
- bool cacheEntry = true;
-
MY_INF(">> p9_stop_save_scom");
- //Reads SGPE image version info from QPMR Header in HOMER
- //For backward compatibility, for base version of SGPE Hcode,
- //STOP API retains default behavior but adds version specific
- //details in each entry in later versions.
- imageVer = *(uint32_t*)((uint8_t*)i_pImage + QPMR_HOMER_OFFSET + QPMR_BUILD_VER_BYTE);
- imageVer = SWIZZLE_4_BYTE(imageVer);
-
+ return proc_stop_save_scom( i_pImage, i_scomAddress,
+ i_scomData, i_operation, i_section );
+}
- do
- {
- chipletId = i_scomAddress >> 24;
- chipletId = chipletId & 0x3F;
+//-----------------------------------------------------------------------------
- l_rc = validateScomImageInputs( i_pImage, i_scomAddress, chipletId, i_operation, i_section );
+/**
+ * @brief searches a self save entry of an SPR in self-save segment.
+ * @param[in] i_sprBitPos bit position associated with SPR in save mask vector.
+ * @param[in] l_pSprSaveStart start location of SPR save segment
+ * @param[in] i_searchLength length of SPR save segment
+ * @param[in] i_pSaveSprLoc start location of save entry for a given SPR.
+ * @return STOP_SAVE_SUCCESS if look up succeeds, error code otherwise.
+ */
+STATIC StopReturnCode_t lookUpSelfSaveSpr( uint32_t i_sprBitPos, uint32_t* l_pSprSaveStart,
+ uint32_t i_searchLength, uint32_t** i_pSaveSprLoc )
+{
+ int32_t l_saveWordLength = (int32_t)(i_searchLength >> 2);
+ uint32_t l_oriInst = getOriInstruction( 0, 0, i_sprBitPos );
+ StopReturnCode_t l_rc = STOP_SAVE_FAIL;
- if( l_rc )
+ while( l_saveWordLength > 0 )
+ {
+ if( l_oriInst == *l_pSprSaveStart )
{
- MY_ERR( "invalid argument: aborting");
+ *i_pSaveSprLoc = l_pSprSaveStart;
+ l_rc = STOP_SAVE_SUCCESS;
break;
}
- if( chipletId >= CORE_CHIPLET_ID_MIN )
- {
- // chiplet is core. So, let us find the start address of SCOM area
- // pertaining to a core in STOP image.
- l_maxScomRestoreEntry =
- *(uint32_t*)((uint8_t*)i_pImage + CPMR_HOMER_OFFSET + CPMR_MAX_SCOM_REST_PER_CORE_BYTE);
- pScomEntry = CORE_ID_SCOM_START(i_pImage, chipletId )
- cacheEntry = false;
+ l_pSprSaveStart++;
+ l_saveWordLength--;
+ }
- if( !l_maxScomRestoreEntry )
- {
- //Old HB and new STOP API case. Retain legacy Number
- l_maxScomRestoreEntry = SWIZZLE_4_BYTE(LEGACY_CORE_SCOM_SUPPORTED);
- }
- }
- else
- {
- l_maxScomRestoreEntry =
- *(uint32_t*)((uint8_t*)i_pImage + QPMR_HOMER_OFFSET + QPMR_QUAD_MAX_SCOM_ENTRY_BYTE);
+ return l_rc;
+}
- if( !l_maxScomRestoreEntry )
- {
- // Incase of a bad HOMER header initialization, fall back on legacy number.
- l_maxScomRestoreEntry = SWIZZLE_4_BYTE(LEGACY_QUAD_SCOM_SUPPORTED);
- }
- // chiplet is a cache. let us find start address of cache section
- // associated with given chiplet. A cache section associated with
- // given chiplet is split in to L2, L3 and EQ area.
- pStopCacheScomStart = CACHE_SECTN_START(i_pImage,
- chipletId);
- }
+//-----------------------------------------------------------------------------
- l_maxScomRestoreEntry = SWIZZLE_4_BYTE(l_maxScomRestoreEntry);
+/**
+ * @brief searches a self save entry of an SPR in self-save segment.
+ * @param[in] i_pSaveReg start of editable location of a SPR save entry.
+ * @param[in] i_sprNum Id of the SPR for which entry needs to be edited.
+ * @return STOP_SAVE_SUCCESS if look up succeeds, error code otherwise.
+ */
+STATIC StopReturnCode_t updateSelfSaveEntry( uint32_t* i_pSaveReg, uint16_t i_sprNum )
+{
+ StopReturnCode_t l_rc = STOP_SAVE_SUCCESS;
- if(( !pStopCacheScomStart ) && ( !pScomEntry) )
+ do
+ {
+ if( !i_pSaveReg )
{
- //Error invalid pointer to SCOM entry in cache or core section
- //of STOP image.
- MY_ERR("invalid start location for chiplet %d",
- chipletId );
+ l_rc = STOP_SAVE_FAIL;
+ MY_ERR( "Failed to update self save area for SPR 0x%04x", i_sprNum );
break;
}
- switch( i_section )
+ if( P9_STOP_SPR_MSR == i_sprNum )
{
- case P9_STOP_SECTION_EQ_SCOM:
- pScomEntry = pStopCacheScomStart->nonCacheArea;
- entryLimit = MAX_EQ_SCOM_ENTRIES;
- break;
+ *i_pSaveReg = getMfmsrInstruction( 1 );
+ }
+ else
+ {
+ *i_pSaveReg = getMfsprInstruction( 1, i_sprNum );
+ }
- case P9_STOP_SECTION_L2:
- pScomEntry = pStopCacheScomStart->l2CacheArea;
- entryLimit = MAX_L2_SCOM_ENTRIES;
- break;
+ i_pSaveReg++;
+
+ *i_pSaveReg = getBranchLinkRegInstruction( );
+ }
+ while(0);
+
+ return l_rc;
+}
+
+//-----------------------------------------------------------------------------
+
+StopReturnCode_t p9_stop_save_cpureg_control( void* i_pImage,
+ const uint64_t i_pir,
+ const uint32_t i_saveRegVector )
+{
+ MY_INF( ">> p9_stop_save_cpureg_control" );
+
+ return proc_stop_save_cpureg_control( i_pImage, i_pir, i_saveRegVector );
+}
+
+//-----------------------------------------------------------------------------------------------------
+
+StopReturnCode_t p9_stop_init_cpureg( void* const i_pImage, const uint32_t i_corePos )
+{
+ MY_INF( ">> p9_stop_init_cpureg" );
+
+ return proc_stop_init_cpureg( i_pImage, i_corePos );
+}
+
+//-----------------------------------------------------------------------------------------------------
+
+StopReturnCode_t p9_stop_init_self_save( void* const i_pImage, const uint32_t i_corePos )
+{
+ MY_INF( ">> p9_stop_init_self_save" );
+
+ return proc_stop_init_self_save( i_pImage, i_corePos );
+}
+
+//-----------------------------------------------------------------------------------------------------
+
+StopReturnCode_t proc_stop_init_cpureg( void* const i_pImage, const uint32_t i_corePos )
+{
+
+ StopReturnCode_t l_rc = STOP_SAVE_SUCCESS;
+ uint32_t* l_pRestoreStart = NULL;
+ void* l_pTempLoc = NULL;
+ SmfHomerSection_t* l_pHomer = NULL;
+ uint32_t l_threadPos = 0;
+ uint32_t l_lookUpKey = 0;
+ uint32_t l_sprIndex = 0;
+ uint8_t l_selfRestVer = 0;
+
+ MY_INF( ">> proc_stop_init_cpureg" );
+
+ do
+ {
+ if( !i_pImage )
+ {
+ l_rc = STOP_SAVE_ARG_INVALID_IMG;
+ break;
+ }
+
+ if( i_corePos > MAX_CORE_ID_SUPPORTED )
+ {
+ l_rc = STOP_SAVE_ARG_INVALID_CORE;
+ break;
+ }
+
+ l_pHomer = ( SmfHomerSection_t * ) i_pImage;
+ l_selfRestVer = *(uint8_t *)((uint8_t *)i_pImage + CPMR_HOMER_OFFSET + CPMR_SELF_RESTORE_VER_BYTE );
+
+ for( l_sprIndex = 0; l_sprIndex < MAX_SPR_SUPPORTED; l_sprIndex++ )
+ {
+ //Check if a given SPR needs to be self-saved each time on STOP entry
+
+ l_lookUpKey = genKeyForSprLookup( ( CpuReg_t )g_sprRegister[l_sprIndex].iv_sprId );
+
+ if( g_sprRegister[l_sprIndex].iv_isThreadScope )
+ {
+ for( l_threadPos = 0; l_threadPos < MAX_THREADS_PER_CORE; l_threadPos++ )
+ {
+ l_pRestoreStart =
+ (uint32_t*)&l_pHomer->iv_coreThreadRestore[i_corePos].iv_threadRestoreArea[l_threadPos][0];
+
+ l_rc = lookUpSprInImage( (uint32_t*)l_pRestoreStart, l_lookUpKey,
+ g_sprRegister[l_sprIndex].iv_isThreadScope,
+ &l_pTempLoc,
+ l_selfRestVer );
+
+ if( l_rc )
+ {
+ MY_ERR( "Thread SPR lookup failed in p9_stop_init_cpureg SPR %d Core %d Thread %d Index %d",
+ g_sprRegister[l_sprIndex].iv_sprId, i_corePos, l_threadPos, l_sprIndex );
+ break;
+ }
+
+ l_rc = updateSprEntryInImage( (uint32_t*) l_pTempLoc,
+ ( CpuReg_t )g_sprRegister[l_sprIndex].iv_sprId,
+ 0x00,
+ INIT_SPR_REGION );
+
+ if( l_rc )
+ {
+ MY_ERR( "Thread SPR region init failed. Core %d SPR Id %d",
+ i_corePos, g_sprRegister[l_sprIndex].iv_sprId );
+ break;
+ }
+
+ }//end for thread
+
+ if( l_rc )
+ {
+ break;
+ }
+
+ }//end if SPR threadscope
+ else
+ {
+ l_pRestoreStart = (uint32_t*)&l_pHomer->iv_coreThreadRestore[i_corePos].iv_coreRestoreArea[0];
+
+ l_rc = lookUpSprInImage( (uint32_t*)l_pRestoreStart, l_lookUpKey,
+ g_sprRegister[l_sprIndex].iv_isThreadScope,
+ &l_pTempLoc, l_selfRestVer );
+
+ if( l_rc )
+ {
+ MY_ERR( "Core SPR lookup failed in p9_stop_init_cpureg" );
+ break;
+ }
+
+ l_rc = updateSprEntryInImage( (uint32_t*) l_pTempLoc,
+ ( CpuReg_t )g_sprRegister[l_sprIndex].iv_sprId,
+ 0x00,
+ INIT_SPR_REGION );
+
+ if( l_rc )
+ {
+ MY_ERR( "Core SPR region init failed. Core %d SPR Id %d SPR Index %d",
+ i_corePos, g_sprRegister[l_sprIndex].iv_sprId, l_sprIndex );
+ break;
+ }
+
+ }// end else
+
+ }// end for l_sprIndex
+
+ }
+ while(0);
+
+ MY_INF( "<< proc_stop_init_cpureg" );
+
+ return l_rc;
+}
+
+//-----------------------------------------------------------------------------------------------------
+
+StopReturnCode_t proc_stop_save_scom( void* const i_pImage,
+ const uint32_t i_scomAddress,
+ const uint64_t i_scomData,
+ const ScomOperation_t i_operation,
+ const ScomSection_t i_section )
+{
+ StopReturnCode_t l_rc = STOP_SAVE_SUCCESS;
+ uint32_t entryLimit = 0;
+ uint8_t chipletId = 0;
+ uint32_t nopInst = 0;
+ uint32_t index = 0;
+ uint32_t imageVer = 0;
+ uint32_t entrySwzHeader = 0;
+ uint32_t l_maxScomRestoreEntry = 0;
+ ScomEntry_t* pScomEntry = NULL;
+ ScomEntry_t* pEntryLocation = NULL;
+ ScomEntry_t* pNopLocation = NULL;
+ ScomEntry_t* pEditScomHeader = NULL;
+ StopCacheSection_t* pStopCacheScomStart = NULL;
+ ScomEntry_t* pTableEndLocationtable = NULL;
+ uint32_t swizzleAddr;
+ uint64_t swizzleData;
+ uint32_t swizzleAttn;
+ uint32_t swizzleBlr = SWIZZLE_4_BYTE(BLR_INST);
+ bool cacheEntry = true;
+
+ MY_INF( ">> proc_stop_save_scom" );
+
+ //Reads SGPE image version info from QPMR Header in HOMER
+ //For backward compatibility, for base version of SGPE Hcode,
+ //STOP API retains default behavior but adds version specific
+ //details in each entry in later versions.
+ imageVer = *(uint32_t*)((uint8_t*)i_pImage + QPMR_HOMER_OFFSET + QPMR_BUILD_VER_BYTE);
+ imageVer = SWIZZLE_4_BYTE(imageVer);
+
+
+ do
+ {
+ chipletId = i_scomAddress >> 24;
+ chipletId = chipletId & 0x3F;
+
+ l_rc = validateScomImageInputs( i_pImage, i_scomAddress, chipletId, i_operation, i_section );
+
+ if( l_rc )
+ {
+ MY_ERR( "invalid argument: aborting");
+ break;
+ }
+
+ if( chipletId >= CORE_CHIPLET_ID_MIN )
+ {
+ // chiplet is core. So, let us find the start address of SCOM area
+ // pertaining to a core in STOP image.
+ l_maxScomRestoreEntry =
+ *(uint32_t*)((uint8_t*)i_pImage + CPMR_HOMER_OFFSET + CPMR_MAX_SCOM_REST_PER_CORE_BYTE);
+ pScomEntry = CORE_ID_SCOM_START(i_pImage, chipletId )
+ cacheEntry = false;
+
+ if( !l_maxScomRestoreEntry )
+ {
+ //Old HB and new STOP API case. Retain legacy Number
+ l_maxScomRestoreEntry = SWIZZLE_4_BYTE(LEGACY_CORE_SCOM_SUPPORTED);
+ }
+ }
+ else
+ {
+ l_maxScomRestoreEntry =
+ *(uint32_t*)((uint8_t*)i_pImage + QPMR_HOMER_OFFSET + QPMR_QUAD_MAX_SCOM_ENTRY_BYTE);
+
+ if( !l_maxScomRestoreEntry )
+ {
+ // Incase of a bad HOMER header initialization, fall back on legacy number.
+ l_maxScomRestoreEntry = SWIZZLE_4_BYTE(LEGACY_QUAD_SCOM_SUPPORTED);
+ }
+ // chiplet is a cache. let us find start address of cache section
+ // associated with given chiplet. A cache section associated with
+ // given chiplet is split in to L2, L3 and EQ area.
+ pStopCacheScomStart = CACHE_SECTN_START(i_pImage,
+ chipletId);
+ }
+
+ l_maxScomRestoreEntry = SWIZZLE_4_BYTE(l_maxScomRestoreEntry);
+
+ if(( !pStopCacheScomStart ) && ( !pScomEntry) )
+ {
+ //Error invalid pointer to SCOM entry in cache or core section
+ //of STOP image.
+ MY_ERR("invalid start location for chiplet %d",
+ chipletId );
+ break;
+ }
+
+ switch( i_section )
+ {
+ case P9_STOP_SECTION_EQ_SCOM:
+ pScomEntry = pStopCacheScomStart->nonCacheArea;
+ entryLimit = MAX_EQ_SCOM_ENTRIES;
+ break;
+
+ case P9_STOP_SECTION_L2:
+ pScomEntry = pStopCacheScomStart->l2CacheArea;
+ entryLimit = MAX_L2_SCOM_ENTRIES;
+ break;
case P9_STOP_SECTION_L3:
pScomEntry = pStopCacheScomStart->l3CacheArea;
@@ -1274,131 +1381,60 @@ StopReturnCode_t p9_stop_save_scom( void* const i_pImage,
if( NULL == pEntryLocation )
{
editAppend = pTableEndLocationtable;
- }
- else
- {
- editAppend = pEntryLocation;
-
- if( P9_STOP_SCOM_OR_APPEND == i_operation )
- {
- tempOperation = P9_STOP_SCOM_OR;
- }
- else
- {
- tempOperation = P9_STOP_SCOM_AND;
- }
- }
-
- l_rc = editScomEntry( swizzleAddr,
- swizzleData,
- editAppend,
- tempOperation );
-
- pEditScomHeader = editAppend;
- }
- break;
-
- default:
- l_rc = STOP_SAVE_SCOM_INVALID_OPERATION;
- break;
- }
- }
- while(0);
-
- if( l_rc )
- {
- MY_ERR("SCOM image operation 0x%08x failed for chiplet 0x%08x addr"
- "0x%08x", i_operation, chipletId ,
- i_scomAddress );
- }
- else
- {
- //Update SCOM Restore entry with version and memory layout
- //info
- updateEntryHeader( pEditScomHeader, imageVer, l_maxScomRestoreEntry );
- }
-
- MY_INF("<< p9_stop_save_scom");
- return l_rc;
-}
-
-//-----------------------------------------------------------------------------
-
-/**
- * @brief searches a self save entry of an SPR in self-save segment.
- * @param[in] i_sprBitPos bit position associated with SPR in save mask vector.
- * @param[in] l_pSprSaveStart start location of SPR save segment
- * @param[in] i_searchLength length of SPR save segment
- * @param[in] i_pSaveSprLoc start location of save entry for a given SPR.
- * @return STOP_SAVE_SUCCESS if look up succeeds, error code otherwise.
- */
-STATIC StopReturnCode_t lookUpSelfSaveSpr( uint32_t i_sprBitPos, uint32_t* l_pSprSaveStart,
- uint32_t i_searchLength, uint32_t** i_pSaveSprLoc )
-{
- int32_t l_saveWordLength = (int32_t)(i_searchLength >> 2);
- uint32_t l_oriInst = getOriInstruction( 0, 0, i_sprBitPos );
- StopReturnCode_t l_rc = STOP_SAVE_FAIL;
-
- while( l_saveWordLength > 0 )
- {
- if( l_oriInst == *l_pSprSaveStart )
- {
- *i_pSaveSprLoc = l_pSprSaveStart;
- l_rc = STOP_SAVE_SUCCESS;
- break;
- }
-
- l_pSprSaveStart++;
- l_saveWordLength--;
- }
-
- return l_rc;
-}
-
-//-----------------------------------------------------------------------------
-
-/**
- * @brief searches a self save entry of an SPR in self-save segment.
- * @param[in] i_pSaveReg start of editable location of a SPR save entry.
- * @param[in] i_sprNum Id of the SPR for which entry needs to be edited.
- * @return STOP_SAVE_SUCCESS if look up succeeds, error code otherwise.
- */
-STATIC StopReturnCode_t updateSelfSaveEntry( uint32_t* i_pSaveReg, uint16_t i_sprNum )
-{
- StopReturnCode_t l_rc = STOP_SAVE_SUCCESS;
-
- do
- {
- if( !i_pSaveReg )
- {
- l_rc = STOP_SAVE_FAIL;
- MY_ERR( "Failed to update self save area for SPR 0x%04x", i_sprNum );
- break;
- }
+ }
+ else
+ {
+ editAppend = pEntryLocation;
- if( P9_STOP_SPR_MSR == i_sprNum )
- {
- *i_pSaveReg = getMfmsrInstruction( 1 );
- }
- else
- {
- *i_pSaveReg = getMfsprInstruction( 1, i_sprNum );
- }
+ if( P9_STOP_SCOM_OR_APPEND == i_operation )
+ {
+ tempOperation = P9_STOP_SCOM_OR;
+ }
+ else
+ {
+ tempOperation = P9_STOP_SCOM_AND;
+ }
+ }
- i_pSaveReg++;
+ l_rc = editScomEntry( swizzleAddr,
+ swizzleData,
+ editAppend,
+ tempOperation );
- *i_pSaveReg = getBranchLinkRegInstruction( );
+ pEditScomHeader = editAppend;
+ }
+ break;
+
+ default:
+ l_rc = STOP_SAVE_SCOM_INVALID_OPERATION;
+ break;
+ }
}
while(0);
+ if( l_rc )
+ {
+ MY_ERR("SCOM image operation 0x%08x failed for chiplet 0x%08x addr"
+ "0x%08x", i_operation, chipletId ,
+ i_scomAddress );
+ }
+ else
+ {
+ //Update SCOM Restore entry with version and memory layout
+ //info
+ updateEntryHeader( pEditScomHeader, imageVer, l_maxScomRestoreEntry );
+ }
+
+ MY_INF( "<< proc_stop_save_scom" );
+
return l_rc;
}
-//-----------------------------------------------------------------------------
+//-----------------------------------------------------------------------------------------------------
-StopReturnCode_t p9_stop_save_cpureg_control( void* i_pImage,
- const uint64_t i_pir,
- const uint32_t i_saveRegVector )
+StopReturnCode_t proc_stop_save_cpureg_control( void* i_pImage,
+ const uint64_t i_pir,
+ const uint32_t i_saveRegVector )
{
StopReturnCode_t l_rc = STOP_SAVE_SUCCESS;
uint32_t l_coreId = 0;
@@ -1411,8 +1447,10 @@ StopReturnCode_t p9_stop_save_cpureg_control( void* i_pImage,
uint32_t* l_pRestoreStart = NULL;
uint32_t* l_pSprSave = NULL;
void* l_pTempLoc = NULL;
+ uint32_t * l_pTempWord = NULL;
SmfHomerSection_t* l_pHomer = NULL;
uint8_t l_selfRestVer = 0;
+ MY_INF(">> proc_stop_save_cpureg_control" );
do
{
@@ -1440,6 +1478,11 @@ StopReturnCode_t p9_stop_save_cpureg_control( void* i_pImage,
{
l_sprPos = g_sprRegister[l_sprIndex].iv_saveMaskPos;
+ if( l_sprPos > MAX_SPR_BIT_POS )
+ {
+ continue;
+ }
+
//Check if a given SPR needs to be self-saved each time on STOP entry
if( i_saveRegVector & ( TEST_BIT_PATTERN >> l_sprPos ) )
@@ -1493,139 +1536,187 @@ StopReturnCode_t p9_stop_save_cpureg_control( void* i_pImage,
//update specific instructions of self save region to enable saving for SPR
l_rc = updateSelfSaveEntry( l_pSprSave, g_sprRegister[l_sprIndex].iv_sprId );
+ if( l_rc )
+ {
+ MY_ERR( "Failed to update self save instructions for 0x%08x",
+ (uint32_t) g_sprRegister[l_sprIndex].iv_sprId );
+ }
+
+ if( l_pTempLoc )
+ {
+ l_pTempWord = (uint32_t *)l_pTempLoc;
+ l_pTempWord++;
+ *l_pTempWord = getXorInstruction( 0, 0, 0 );
+ }
+
}// end if( i_saveRegVector..)
}// end for
}
while(0);
+ MY_INF("<< proc_stop_save_cpureg_control" );
+
return l_rc;
+
}
//-----------------------------------------------------------------------------------------------------
-StopReturnCode_t p9_stop_init_cpureg( void* const i_pImage, const uint32_t i_corePos )
+StopReturnCode_t proc_stop_save_cpureg( void* const i_pImage,
+ const CpuReg_t i_regId,
+ const uint64_t i_regData,
+ const uint64_t i_pir )
{
- StopReturnCode_t l_rc = STOP_SAVE_SUCCESS;
- uint32_t* l_pRestoreStart = NULL;
- void* l_pTempLoc = NULL;
- SmfHomerSection_t* l_pHomer = NULL;
- uint32_t l_threadPos = 0;
- uint32_t l_lookUpKey = 0;
- uint32_t l_sprIndex = 0;
- uint8_t l_selfRestVer = 0;
- MY_INF( ">> p9_stop_init_cpureg" );
+ StopReturnCode_t l_rc = STOP_SAVE_SUCCESS; // procedure return code
+ HomerSection_t* chipHomer = NULL;
+ SmfHomerSection_t* smfChipHomer = NULL;
+
+ MY_INF(">> proc_stop_save_cpureg" );
do
{
- if( !i_pImage )
+ uint32_t threadId = 0;
+ uint32_t coreId = 0;
+ uint32_t lookUpKey = 0;
+ void* pSprEntryLocation = NULL; // an offset w.r.t. to start of image
+ void* pThreadLocation = NULL;
+ bool threadScopeReg = false;
+ uint8_t l_urmorFix = false;
+ uint64_t l_sprValue = 0;
+ uint8_t l_selfRestVer = 0;
+
+
+ l_rc = getCoreAndThread( i_pImage, i_pir, &coreId, &threadId );
+
+ if( l_rc )
{
- l_rc = STOP_SAVE_ARG_INVALID_IMG;
+ MY_ERR("Failed to determine Core Id and Thread Id from PIR 0x%016llx",
+ i_pir);
break;
}
- if( i_corePos > MAX_CORE_ID_SUPPORTED )
+ MY_INF( " PIR 0x%016llx coreId %d threadid %d "
+ " registerId %d", i_pir, coreId,
+ threadId, i_regId );
+
+ // First of all let us validate all input arguments.
+ l_rc = validateSprImageInputs( i_pImage,
+ i_regId,
+ coreId,
+ &threadId,
+ &threadScopeReg );
+
+ if( l_rc )
{
- l_rc = STOP_SAVE_ARG_INVALID_CORE;
+ // Error: bad argument traces out error code
+ MY_ERR("Bad input argument rc %d", l_rc );
+
break;
}
- l_pHomer = ( SmfHomerSection_t * ) i_pImage;
+ l_urmorFix = *(uint8_t*)((uint8_t*)i_pImage + CPMR_HOMER_OFFSET + CPMR_URMOR_FIX_BYTE);
l_selfRestVer = *(uint8_t *)((uint8_t *)i_pImage + CPMR_HOMER_OFFSET + CPMR_SELF_RESTORE_VER_BYTE );
- for( l_sprIndex = 0; l_sprIndex < MAX_SPR_SUPPORTED; l_sprIndex++ )
+ if( l_selfRestVer )
{
- //Check if a given SPR needs to be self-saved each time on STOP entry
-
- l_lookUpKey = genKeyForSprLookup( ( CpuReg_t )g_sprRegister[l_sprIndex].iv_sprId );
+ smfChipHomer = ( SmfHomerSection_t*)i_pImage;
- if( g_sprRegister[l_sprIndex].iv_isThreadScope )
+ if( threadScopeReg )
{
- for( l_threadPos = 0; l_threadPos < MAX_THREADS_PER_CORE; l_threadPos++ )
- {
- l_pRestoreStart =
- (uint32_t*)&l_pHomer->iv_coreThreadRestore[i_corePos].iv_threadRestoreArea[l_threadPos][0];
-
- l_rc = lookUpSprInImage( (uint32_t*)l_pRestoreStart, l_lookUpKey,
- g_sprRegister[l_sprIndex].iv_isThreadScope,
- &l_pTempLoc,
- l_selfRestVer );
-
- if( l_rc )
- {
- MY_ERR( "Thread SPR lookup failed in p9_stop_init_cpureg SPR %d Core %d Thread %d Index %d",
- g_sprRegister[l_sprIndex].iv_sprId, i_corePos, l_threadPos, l_sprIndex );
- break;
- }
-
- l_rc = updateSprEntryInImage( (uint32_t*) l_pTempLoc,
- ( CpuReg_t )g_sprRegister[l_sprIndex].iv_sprId,
- 0x00,
- INIT_SPR_REGION );
-
- if( l_rc )
- {
- MY_ERR( "Thread SPR region init failed. Core %d SPR Id %d",
- i_corePos, g_sprRegister[l_sprIndex].iv_sprId );
- break;
- }
-
- }//end for thread
-
- if( l_rc )
- {
- break;
- }
-
- }//end if SPR threadscope
+ pThreadLocation =
+ &(smfChipHomer->iv_coreThreadRestore[coreId].iv_threadRestoreArea[threadId][0]);
+ }
else
{
- l_pRestoreStart = (uint32_t*)&l_pHomer->iv_coreThreadRestore[i_corePos].iv_coreRestoreArea[0];
+ pThreadLocation =
+ &(smfChipHomer->iv_coreThreadRestore[coreId].iv_coreRestoreArea[0]);
+ }
+ }
+ else //Old fips or OPAL release that doesn't support SMF
+ {
+ chipHomer = (HomerSection_t*)i_pImage;
- l_rc = lookUpSprInImage( (uint32_t*)l_pRestoreStart, l_lookUpKey,
- g_sprRegister[l_sprIndex].iv_isThreadScope,
- &l_pTempLoc, l_selfRestVer );
+ if( threadScopeReg )
+ {
+ pThreadLocation =
+ &(chipHomer->iv_coreThreadRestore[coreId][threadId].iv_threadArea[0]);
+ }
+ else
+ {
+ pThreadLocation =
+ &(chipHomer->iv_coreThreadRestore[coreId][threadId].iv_coreArea[0]);
+ }
+ }
- if( l_rc )
- {
- MY_ERR( "Core SPR lookup failed in p9_stop_init_cpureg" );
- break;
- }
+ if( ( SWIZZLE_4_BYTE(BLR_INST) == *(uint32_t*)pThreadLocation ) ||
+ ( SWIZZLE_4_BYTE(ATTN_OPCODE) == *(uint32_t*) pThreadLocation ) )
+ {
+ // table for given core id doesn't exit. It needs to be
+ // defined.
+ pSprEntryLocation = pThreadLocation;
+ }
+ else
+ {
+ // an SPR restore section for given core already exists
+ lookUpKey = genKeyForSprLookup( i_regId );
+ l_rc = lookUpSprInImage( (uint32_t*)pThreadLocation,
+ lookUpKey,
+ threadScopeReg,
+ &pSprEntryLocation,
+ l_selfRestVer );
+ }
- l_rc = updateSprEntryInImage( (uint32_t*) l_pTempLoc,
- ( CpuReg_t )g_sprRegister[l_sprIndex].iv_sprId,
- 0x00,
- INIT_SPR_REGION );
+ if( l_rc )
+ {
+ MY_ERR("Invalid or corrupt SPR entry. CoreId 0x%08x threadId ",
+ "0x%08x regId 0x%08x lookUpKey 0x%08x pThreadLocation 0x%08x"
+ , coreId, threadId, i_regId, lookUpKey, pThreadLocation );
+ break;
+ }
- if( l_rc )
- {
- MY_ERR( "Core SPR region init failed. Core %d SPR Id %d SPR Index %d",
- i_corePos, g_sprRegister[l_sprIndex].iv_sprId, l_sprIndex );
- break;
- }
+ if( ( P9_STOP_SPR_URMOR == i_regId ) && ( l_urmorFix ) )
+ {
+ l_sprValue = i_regData - URMOR_CORRECTION;
+ }
+ else
+ {
+ l_sprValue = i_regData;
+ }
- }// end else
+ l_rc = updateSprEntryInImage( (uint32_t*) pSprEntryLocation,
+ i_regId,
+ l_sprValue,
+ UPDATE_SPR_ENTRY );
- }// end for l_sprIndex
+ if( l_rc )
+ {
+ MY_ERR( " Failed to update the SPR entry of PIR 0x%08x reg"
+ "0x%08x", i_pir, i_regId );
+ break;
+ }
}
while(0);
- MY_INF( "<< p9_stop_init_cpureg" );
+ MY_INF("<< proc_stop_save_cpureg" );
+
return l_rc;
}
//-----------------------------------------------------------------------------------------------------
-StopReturnCode_t p9_stop_init_self_save( void* const i_pImage, const uint32_t i_corePos )
+StopReturnCode_t proc_stop_init_self_save( void* const i_pImage, const uint32_t i_corePos )
{
+
StopReturnCode_t l_rc = STOP_SAVE_SUCCESS;
uint32_t* l_pSaveStart = NULL;
SmfHomerSection_t * l_pHomer = NULL;
uint32_t l_threadPos = 0;
uint32_t l_sprBitPos = 0;
uint32_t l_sprIndexAdj = 0;
- MY_INF( ">> p9_stop_init_self_save" );
+
+ MY_INF(">> proc_stop_init_self_save" );
do
{
@@ -1732,7 +1823,8 @@ StopReturnCode_t p9_stop_init_self_save( void* const i_pImage, const uint32_t i
}
while(0);
- MY_INF( "<< p9_stop_init_self_save" );
+ MY_INF("<< proc_stop_init_self_save" );
+
return l_rc;
}
diff --git a/libpore/p9_stop_api.H b/libpore/p9_stop_api.H
index 17caedb3..3f6420ff 100644
--- a/libpore/p9_stop_api.H
+++ b/libpore/p9_stop_api.H
@@ -70,6 +70,26 @@ typedef enum
P9_STOP_SPR_PMCR = 884, // core register
P9_STOP_SPR_HID = 1008, // core register
P9_STOP_SPR_MSR = 2000, // thread register
+
+ //enum members which are project agnostic
+ PROC_STOP_SPR_DAWR = 180, // thread register
+ PROC_STOP_SPR_CIABR = 187, // thread register
+ PROC_STOP_SPR_DAWRX = 188, // thread register
+ PROC_STOP_SPR_HSPRG0 = 304, // thread register
+ PROC_STOP_SPR_HRMOR = 313, // core register
+ PROC_STOP_SPR_LPCR = 318, // thread register
+ PROC_STOP_SPR_HMEER = 337, // core register
+ PROC_STOP_SPR_PTCR = 464, // core register
+ PROC_STOP_SPR_USPRG0 = 496, // thread register
+ PROC_STOP_SPR_USPRG1 = 497, // thread register
+ PROC_STOP_SPR_URMOR = 505, // core register
+ PROC_STOP_SPR_SMFCTRL = 511, // thread register
+ PROC_STOP_SPR_LDBAR = 850, // thread register
+ PROC_STOP_SPR_PSSCR = 855, // thread register
+ PROC_STOP_SPR_PMCR = 884, // core register
+ PROC_STOP_SPR_HID = 1008, // core register
+ PROC_STOP_SPR_MSR = 2000, // thread register
+
} CpuReg_t;
/**
@@ -110,7 +130,20 @@ typedef enum
P9_STOP_SCOM_RESET = 6,
P9_STOP_SCOM_OR_APPEND = 7,
P9_STOP_SCOM_AND_APPEND = 8,
- P9_STOP_SCOM_OP_MAX = 9
+ P9_STOP_SCOM_OP_MAX = 9,
+
+ //enum members which are project agnostic
+ PROC_STOP_SCOM_OP_MIN = 0,
+ PROC_STOP_SCOM_APPEND = 1,
+ PROC_STOP_SCOM_REPLACE = 2,
+ PROC_STOP_SCOM_OR = 3,
+ PROC_STOP_SCOM_AND = 4,
+ PROC_STOP_SCOM_NOOP = 5,
+ PROC_STOP_SCOM_RESET = 6,
+ PROC_STOP_SCOM_OR_APPEND = 7,
+ PROC_STOP_SCOM_AND_APPEND = 8,
+ PROC_STOP_SCOM_OP_MAX = 9,
+
} ScomOperation_t;
/**
@@ -123,7 +156,15 @@ typedef enum
P9_STOP_SECTION_EQ_SCOM = 2,
P9_STOP_SECTION_L2 = 3,
P9_STOP_SECTION_L3 = 4,
- P9_STOP_SECTION_MAX = 5
+ P9_STOP_SECTION_MAX = 5,
+
+ //enum members which are project agnostic
+ PROC_STOP_SECTION_MIN = 0,
+ PROC_STOP_SECTION_CORE_SCOM = 1,
+ PROC_STOP_SECTION_EQ_SCOM = 2,
+ PROC_STOP_SECTION_L2 = 3,
+ PROC_STOP_SECTION_L3 = 4,
+ PROC_STOP_SECTION_MAX = 5,
} ScomSection_t;
/**
@@ -148,7 +189,6 @@ typedef enum
BIT_POS_LPCR = 5,
BIT_POS_PSSCR = 6,
BIT_POS_MSR = 7,
- BIT_POS_HRMOR = 20,
BIT_POS_HID = 21,
BIT_POS_HMEER = 22,
BIT_POS_PMCR = 23,
@@ -156,7 +196,6 @@ typedef enum
BIT_POS_SMFCTRL = 28,
BIT_POS_USPRG0 = 29,
BIT_POS_USPRG1 = 30,
- BIT_POS_URMOR = 31,
} SprBitPositionList_t;
@@ -229,13 +268,79 @@ p9_stop_save_cpureg_control( void* i_pImage, const uint64_t i_pir,
* @brief initializes self-save region with specific instruction.
* @param[in] i_pImage start address of homer image of P9 chip.
* @param[in] i_corePos physical core's relative position within processor chip.
- * @return STOP_SAVE_SUCCESS SUCCESS if self-save is initialized successfully,
+ * @return STOP_SAVE_SUCCESS if self-save is initialized successfully,
* error code otherwise.
* @note API is intended only for use case of HOMER build. There is no explicit
* effort to support any other use case.
*/
StopReturnCode_t p9_stop_init_self_save( void* const i_pImage, const uint32_t i_corePos );
+/**
+ * @brief creates SCOM restore entry for a given scom adress in HOMER.
+ * @param i_pImage points to start address of HOMER image.
+ * @param i_scomAddress address associated with SCOM restore entry.
+ * @param i_scomData data associated with SCOM restore entry.
+ * @param i_operation operation type requested for API.
+ * @param i_section section of HOMER in which restore entry needs to be created.
+ * @return STOP_SAVE_SUCCESS if API succeeds, error code otherwise.
+ * @note It is an API for creating SCOM restore entry in HOMER. It is agnostic to
+ * generation of POWER processor.
+ */
+
+StopReturnCode_t proc_stop_save_scom( void* const i_pImage,
+ const uint32_t i_scomAddress,
+ const uint64_t i_scomData,
+ const ScomOperation_t i_operation,
+ const ScomSection_t i_section );
+
+/**
+ * @brief initializes self save restore region of HOMER.
+ * @param[in] i_pImage points to base of HOMER image.
+ * @param[in] i_corePos position of the physical core.
+ * @return STOP_SAVE_SUCCESS if API succeeds, error code otherwise.
+ * @note It is an API for initializing self restore region in HOMER. It is agnostic to
+ * generation of POWER processor.
+ */
+StopReturnCode_t proc_stop_init_cpureg( void* const i_pImage, const uint32_t i_corePos );
+
+/**
+ * @brief enables self save for a given set of SPRs
+ * @param[in] i_pImage points to start address of HOMER image.
+ * @param[in] i_pir PIR value associated with core and thread.
+ * @param[in] i_saveRegVector bit vector representing the SPRs that needs to be self saved.
+ * @return STOP_SAVE_SUCCESS if API succeeds, error code otherwise.
+ * @note It is an API for enabling self save of SPRs and it is agnostic to
+ * generation of POWER processor.
+ */
+StopReturnCode_t proc_stop_save_cpureg_control( void* i_pImage,
+ const uint64_t i_pir,
+ const uint32_t i_saveRegVector );
+
+/**
+ * @brief creates an SPR restore entry in HOMER
+ * @param[in] i_pImage points to start address of HOMER image.
+ * @param[in] i_pir PIR value associated with core and thread.
+ * @param[in] i_saveRegVector bit vector representing the SPRs that needs to be self saved.
+ * @return STOP_SAVE_SUCCESS if API succeeds, error code otherwise.
+ * @note It is an API for enabling self save of SPRs and it is agnostic to
+ * generation of POWER processor.
+ */
+StopReturnCode_t proc_stop_save_cpureg( void* const i_pImage,
+ const CpuReg_t i_regId,
+ const uint64_t i_regData,
+ const uint64_t i_pir );
+
+/**
+ * @brief initializes self-save region with specific instruction.
+ * @param[in] i_pImage start address of homer image.
+ * @param[in] i_corePos physical core's relative position within processor chip.
+ * @return STOP_SAVE_SUCCESS if self-save is initialized successfully,
+ * error code otherwise.
+ * @note API is project agnostic and is intended only for use case of HOMER build.
+ * There is no explicit effort to support any other use case.
+ */
+StopReturnCode_t proc_stop_init_self_save( void* const i_pImage, const uint32_t i_corePos );
+
#ifdef __cplusplus
} // extern "C"
}; // namespace stopImageSection ends
diff --git a/libpore/p9_stop_data_struct.H b/libpore/p9_stop_data_struct.H
index 1e9721e0..4e73aab5 100644
--- a/libpore/p9_stop_data_struct.H
+++ b/libpore/p9_stop_data_struct.H
@@ -67,9 +67,9 @@ enum
SIZE_PER_SPR_RESTORE_INST = ((4 * sizeof(uint8_t)) / sizeof(uint32_t)),
MAX_THREAD_LEVEL_SPRS = 11,
MAX_CORE_LEVEL_SPRS = 6,
- MAX_SPR_BIT_POS = 31,
+ MAX_SPR_BIT_POS = 30,
SPR_BIT_POS_8 = 8,
- SPR_BIT_POS_19 = 19,
+ SPR_BIT_POS_20 = 20,
SPR_BIT_POS_25 = 25,
SPR_BIT_POS_27 = 27,
};
diff --git a/libpore/p9_stop_util.H b/libpore/p9_stop_util.H
index 3266fdef..79b4e959 100644
--- a/libpore/p9_stop_util.H
+++ b/libpore/p9_stop_util.H
@@ -5,7 +5,7 @@
/* */
/* OpenPOWER HostBoot Project */
/* */
-/* Contributors Listed Below - COPYRIGHT 2016,2017 */
+/* Contributors Listed Below - COPYRIGHT 2016,2018 */
/* [+] International Business Machines Corp. */
/* */
/* */
@@ -95,7 +95,10 @@ typedef struct
uint64_t cpmrMagicWord;
uint32_t buildDate;
uint32_t version;
- uint8_t reserve1[7];
+ uint8_t reserve1[4];
+ uint8_t selfRestoreVer;
+ uint8_t stopApiVer;
+ uint8_t urmorFix;
uint8_t fusedModeStatus;
uint32_t cmeImgOffset;
uint32_t cmeImgLength;
--
2.25.1
^ permalink raw reply related [flat|nested] 6+ messages in thread
* [PATCH v7 2/4] Self save API integration
2020-04-16 7:53 [PATCH v7 0/4] Support for Self Save API in OPAL Pratik Rajesh Sampat
2020-04-16 7:53 ` [PATCH v7 1/4] Self Save: Introducing Support for SPR Self Save Pratik Rajesh Sampat
@ 2020-04-16 7:53 ` Pratik Rajesh Sampat
2020-04-16 7:53 ` [PATCH v7 3/4] API to verify the STOP API and image compatibility Pratik Rajesh Sampat
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: Pratik Rajesh Sampat @ 2020-04-16 7:53 UTC (permalink / raw)
To: linux-kernel, linuxppc-dev, mpe, skiboot, oohall, ego, linuxram,
pratik.r.sampat, psampat
The commit makes the self save API available outside the firmware by defining
an OPAL wrapper.
This wrapper has a similar interface to that of self restore and expects the
cpu pir, SPR number, minus the value of that SPR to be passed in its
paramters and returns OPAL_SUCCESS on success.
The commit also documents both the self-save and the self-restore API
calls along with their working and usage.
Signed-off-by: Pratik Rajesh Sampat <psampat@linux.ibm.com>
Reviewed-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com>
---
doc/opal-api/opal-slw-self-save-reg-181.rst | 49 ++++++++++++
doc/opal-api/opal-slw-set-reg-100.rst | 5 ++
doc/power-management.rst | 48 +++++++++++
hw/slw.c | 89 +++++++++++++++++++++
include/opal-api.h | 3 +-
include/p9_stop_api.H | 17 ++++
include/skiboot.h | 3 +
7 files changed, 213 insertions(+), 1 deletion(-)
create mode 100644 doc/opal-api/opal-slw-self-save-reg-181.rst
diff --git a/doc/opal-api/opal-slw-self-save-reg-181.rst b/doc/opal-api/opal-slw-self-save-reg-181.rst
new file mode 100644
index 00000000..5aa4c930
--- /dev/null
+++ b/doc/opal-api/opal-slw-self-save-reg-181.rst
@@ -0,0 +1,49 @@
+.. OPAL_SLW_SELF_SAVE_REG:
+
+OPAL_SLW_SELF_SAVE_REG
+======================
+
+.. code-block:: c
+
+ #define OPAL_SLW_SELF_SAVE_REG 181
+
+ int64_t opal_slw_self_save_reg(uint64_t cpu_pir, uint64_t sprn);
+
+:ref:`OPAL_SLW_SELF_SAVE_REG` is used to inform low-level firmware to save
+the current contents of the SPR before entering a state of loss and
+also restore the content back on waking up from a deep stop state.
+
+An OPAL call `OPAL_SLW_SET_REG` exists which is similar in function as
+saving and restoring the SPR, with one difference being that the value of the
+SPR must also be supplied in the parameters.
+Complete reference: doc/opal-api/opal-slw-set-reg-100.rst
+
+Parameters
+----------
+
+``uint64_t cpu_pir``
+ This parameter specifies the pir of the cpu for which the call is being made.
+``uint64_t sprn``
+ This parameter specifies the spr number as mentioned in p9_stop_api.H
+ The list of SPRs supported is as follows. This list is suppiled through the
+ device tree:
+ P9_STOP_SPR_DAWR,
+ P9_STOP_SPR_HSPRG0,
+ P9_STOP_SPR_LDBAR,
+ P9_STOP_SPR_LPCR,
+ P9_STOP_SPR_PSSCR,
+ P9_STOP_SPR_MSR,
+ P9_STOP_SPR_HRMOR,
+ P9_STOP_SPR_HMEER,
+ P9_STOP_SPR_PMCR,
+ P9_STOP_SPR_PTCR
+
+Returns
+-------
+
+:ref:`OPAL_UNSUPPORTED`
+ If spr restore is not supported by pore engine.
+:ref:`OPAL_PARAMETER`
+ Invalid handle for the pir/chip
+:ref:`OPAL_SUCCESS`
+ On success
diff --git a/doc/opal-api/opal-slw-set-reg-100.rst b/doc/opal-api/opal-slw-set-reg-100.rst
index 2e8f1bd6..ee3e68ce 100644
--- a/doc/opal-api/opal-slw-set-reg-100.rst
+++ b/doc/opal-api/opal-slw-set-reg-100.rst
@@ -21,6 +21,11 @@ In Power 9, it uses p9_stop_save_cpureg(), api provided by self restore code,
to inform the spr with their corresponding values with which they
must be restored.
+An OPAL call `OPAL_SLW_SELF_SAVE_REG` exists which is similar in function
+saving and restoring the SPR, with one difference being that the value of the
+SPR doesn't need to be passed in the parameters, only with the SPR number
+the firmware can identify, save and restore the values for the same.
+Complete reference: doc/opal-api/opal-slw-self-save-reg-181.rst
Parameters
----------
diff --git a/doc/power-management.rst b/doc/power-management.rst
index 76491a71..d6bd5358 100644
--- a/doc/power-management.rst
+++ b/doc/power-management.rst
@@ -15,3 +15,51 @@ On boot, specific stop states can be disabled via setting a mask. For example,
to disable all but stop 0,1,2, use ~0xE0000000. ::
nvram -p ibm,skiboot --update-config opal-stop-state-disable-mask=0x1FFFFFFF
+
+Saving and restoring Special Purpose Registers(SPRs)
+----------------------------------------------------
+
+When a CPU wakes up from a deep stop state which can result in
+hypervisor state loss, all the SPRs are lost. The Linux Kernel expects
+a small set of SPRs to contain an expected value when the CPU wakes up
+from such a deep stop state. The microcode firmware provides the
+following two APIs, collectively known as the stop-APIs, to allow the
+kernel/OPAL to specify this set of SPRs and the value that they need
+to be restored with on waking up from a deep stop state.
+
+Self-restore:
+int64_t opal_slw_set_reg(uint64_t cpu_pir, uint64_t sprn, uint64_t val);
+The SPR number and the value of the that SPR must be restored with on
+wakeup from the deep-stop state must be specified. When this call is
+made, the microcode inserts instruction into the HOMER region to
+restore the content of the SPR to the specified value on wakeup from a
+deep-stop state. These instructions are executed by the CPU as soon as
+it wakes up from a deep stop state. The call is to be made once per
+SPR.
+
+Self-Save:
+int64_t opal_slw_self_save_reg(uint64_t cpu_pir, uint64_t sprn);
+Only the SPR number needs to be specified. When this call is made, the
+microcode inserts instructions into the HOMER region to save the
+current value of the SPR before the CPU goes to a deep stop state, and
+restores the value back when the CPU wakes up from a deep stop state.
+These instructions are correspondingly executed just before and after
+the CPU goes/comes out of a deep stop state. This call can be made
+once per SPR.
+
+The key difference between self-save and self-restore is the
+use-case. If the Kernel expects the SPR to contain a particular value
+on waking up from a deep-stop state, that wasn't the value of that SPR
+before entering deep stop-state, then self-restore is preferable.
+Also in a case where SPR does not change across the lifetime
+self-restore is more efficient as when the value is same the memeory location
+is not updated.
+
+When deep stop states are to be supported in an Ultravisor
+environment, since HOMER is in a secure region, the stop-api cannot
+update the HOMER if invoked from a context when the OPAL/Kernel is
+executing without the ultravisor privilege. In this scenario, at the
+time of early OPAL boot, while OPAL has ultravisor privileges, it can
+make the self-save stop-api call for all the supported SPRs, so that
+the microcode in the HOMER will always save and restore all the
+supported SPRs during entry/exit from a deep stop state.
diff --git a/hw/slw.c b/hw/slw.c
index beb129a8..9751c04f 100644
--- a/hw/slw.c
+++ b/hw/slw.c
@@ -35,6 +35,43 @@ static bool slw_current_le = false;
enum wakeup_engine_states wakeup_engine_state = WAKEUP_ENGINE_NOT_PRESENT;
bool has_deep_states = false;
+/**
+ * The struct and SPR list is partially consistent with libpore/p9_stop_api.c
+ */
+/**
+ * @brief summarizes attributes associated with a SPR register.
+ */
+typedef struct
+{
+ uint32_t iv_sprId;
+ bool iv_isThreadScope;
+ uint32_t iv_saveMaskPos;
+
+} StopSprReg_t;
+
+/**
+ * @brief a true in the table below means register is of scope thread
+ * whereas a false meanse register is of scope core.
+ * The number is the bit position on a uint32_t mask
+ */
+
+static const StopSprReg_t g_sprRegister[] =
+{
+ { P9_STOP_SPR_DAWR, true, 1 },
+ { P9_STOP_SPR_HSPRG0, true, 3 },
+ { P9_STOP_SPR_LDBAR, true, 4, },
+ { P9_STOP_SPR_LPCR, true, 5 },
+ { P9_STOP_SPR_PSSCR, true, 6 },
+ { P9_STOP_SPR_MSR, true, 7 },
+ { P9_STOP_SPR_HRMOR, false, 255 },
+ { P9_STOP_SPR_HID, false, 21 },
+ { P9_STOP_SPR_HMEER, false, 22 },
+ { P9_STOP_SPR_PMCR, false, 23 },
+ { P9_STOP_SPR_PTCR, false, 24 },
+};
+
+static const uint32_t MAX_SPR_SUPPORTED = ARRAY_SIZE(g_sprRegister);
+
DEFINE_LOG_ENTRY(OPAL_RC_SLW_INIT, OPAL_PLATFORM_ERR_EVT, OPAL_SLW,
OPAL_PLATFORM_FIRMWARE, OPAL_PREDICTIVE_ERR_GENERAL,
OPAL_NA);
@@ -1446,6 +1483,58 @@ int64_t opal_slw_set_reg(uint64_t cpu_pir, uint64_t sprn, uint64_t val)
opal_call(OPAL_SLW_SET_REG, opal_slw_set_reg, 3);
+int64_t opal_slw_self_save_reg(uint64_t cpu_pir, uint64_t sprn)
+{
+ struct cpu_thread * c = find_cpu_by_pir(cpu_pir);
+ uint32_t save_reg_vector = 0;
+ struct proc_chip * chip;
+ int rc;
+ int index;
+
+ if (!c) {
+ prlog(PR_DEBUG, "SLW: Unknown thread with pir %x\n",
+ (u32) cpu_pir);
+ return OPAL_PARAMETER;
+ }
+
+ chip = get_chip(c->chip_id);
+ if (!chip) {
+ prlog(PR_DEBUG, "SLW: Unknown chip for thread with pir %x\n",
+ (u32) cpu_pir);
+ return OPAL_PARAMETER;
+ }
+ if (proc_gen != proc_gen_p9 || !has_deep_states) {
+ prlog(PR_DEBUG, "SLW: Self-save feature unsupported\n");
+ return OPAL_UNSUPPORTED;
+ }
+ if (wakeup_engine_state != WAKEUP_ENGINE_PRESENT) {
+ log_simple_error(&e_info(OPAL_RC_SLW_REG),
+ "SLW: wakeup_engine in bad state=%d chip=%x\n",
+ wakeup_engine_state, chip->id);
+ return OPAL_INTERNAL_ERROR;
+ }
+ for (index = 0; index < MAX_SPR_SUPPORTED; ++index) {
+ if (sprn == (CpuReg_t) g_sprRegister[index].iv_sprId) {
+ save_reg_vector = PPC_BIT32(
+ g_sprRegister[index].iv_saveMaskPos);
+ break;
+ }
+ }
+ if (save_reg_vector == 0)
+ return OPAL_INTERNAL_ERROR;
+ rc = p9_stop_save_cpureg_control((void *) chip->homer_base,
+ cpu_pir, save_reg_vector);
+
+ if (rc) {
+ log_simple_error(&e_info(OPAL_RC_SLW_REG),
+ "SLW: Failed to save vector %x for CPU %x\n",
+ save_reg_vector, c->pir);
+ return OPAL_INTERNAL_ERROR;
+ }
+ return OPAL_SUCCESS;
+}
+opal_call(OPAL_SLW_SELF_SAVE_REG, opal_slw_self_save_reg, 2);
+
void slw_init(void)
{
struct proc_chip *chip;
diff --git a/include/opal-api.h b/include/opal-api.h
index e90cab1e..1607a89b 100644
--- a/include/opal-api.h
+++ b/include/opal-api.h
@@ -227,7 +227,8 @@
#define OPAL_SECVAR_ENQUEUE_UPDATE 178
#define OPAL_PHB_SET_OPTION 179
#define OPAL_PHB_GET_OPTION 180
-#define OPAL_LAST 180
+#define OPAL_SLW_SELF_SAVE_REG 181
+#define OPAL_LAST 181
#define QUIESCE_HOLD 1 /* Spin all calls at entry */
#define QUIESCE_REJECT 2 /* Fail all calls with OPAL_BUSY */
diff --git a/include/p9_stop_api.H b/include/p9_stop_api.H
index 9d3bc1e5..c304f70f 100644
--- a/include/p9_stop_api.H
+++ b/include/p9_stop_api.H
@@ -34,6 +34,8 @@
///
/// @file p9_stop_api.H
/// @brief describes STOP API which create/manipulate STOP image.
+/// This header need not be consistent, however is a subset of the
+/// libpore/p9_stop_api.H counterpart
///
// *HWP HW Owner : Greg Still <stillgs@us.ibm.com>
// *HWP FW Owner : Prem Shanker Jha <premjha2@in.ibm.com>
@@ -58,6 +60,7 @@ typedef enum
P9_STOP_SPR_HRMOR = 313, // core register
P9_STOP_SPR_LPCR = 318, // thread register
P9_STOP_SPR_HMEER = 337, // core register
+ P9_STOP_SPR_PTCR = 464, // core register
P9_STOP_SPR_LDBAR = 850, // thread register
P9_STOP_SPR_PSSCR = 855, // thread register
P9_STOP_SPR_PMCR = 884, // core register
@@ -230,6 +233,20 @@ StopReturnCode_t p9_stop_save_scom( void* const i_pImage,
const ScomOperation_t i_operation,
const ScomSection_t i_section );
+/**
+ * @brief Facilitates self save and restore of a list of SPRs of a thread.
+ * @param[in] i_pImage points to the start of HOMER image of P9 chip.
+ * @param[in] i_pir PIR associated with thread
+ * @param[in] i_saveRegVector bit vector representing SPRs that needs to be restored.
+ * @return STOP_SAVE_SUCCESS if API succeeds, error code otherwise.
+ * @note SPR save vector is a bit vector. For each SPR supported,
+ * there is an associated bit position in the bit vector.Refer
+ * to definition of SprBitPositionList_t to determine bit position
+ * associated with a particular SPR.
+ */
+StopReturnCode_t
+p9_stop_save_cpureg_control( void* i_pImage, const uint64_t i_pir,
+ const uint32_t i_saveRegVector );
#ifdef __cplusplus
} // extern "C"
}; // namespace stopImageSection ends
diff --git a/include/skiboot.h b/include/skiboot.h
index 30ff500c..9ced240e 100644
--- a/include/skiboot.h
+++ b/include/skiboot.h
@@ -306,6 +306,9 @@ extern void nx_p9_rng_late_init(void);
/* SLW reinit function for switching core settings */
extern int64_t slw_reinit(uint64_t flags);
+/* Self save SPR before entering the stop state */
+extern int64_t opal_slw_self_save_reg(uint64_t cpu_pir, uint64_t sprn);
+
/* Patch SPR in SLW image */
extern int64_t opal_slw_set_reg(uint64_t cpu_pir, uint64_t sprn, uint64_t val);
--
2.25.1
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