[v4] powerpc/perf: Initialize power10 PMU registers in cpu setup routine

Subsystems: linux for powerpc (32-bit and 64-bit), the rest

5 messages, 4 authors, 2020-07-27 · open the first message on its own page

[v4] powerpc/perf: Initialize power10 PMU registers in cpu setup routine

From: Athira Rajeev <hidden>
Date: 2020-07-23 07:34:30 

Initialize Monitor Mode Control Register 3 (MMCR3)
SPR which is new in power10. For PowerISA v3.1, BHRB disable
is controlled via Monitor Mode Control Register A (MMCRA) bit,
namely "BHRB Recording Disable (BHRBRD)". This patch also initializes
MMCRA BHRBRD to disable BHRB feature at boot for power10.

Signed-off-by: Athira Rajeev <redacted>
---
Dependency:
- On power10 PMU base enablement series V3:
  https://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=190462

Changes from v3 -> v4
- Addressed review comments from Jordan and Michael Ellerman.
  This patch was initially part of Power10 PMU base enablement
  series. Moving this as separate patch as suggested by Michael
  Ellerman. Hence dependency of initial series Patch 7 which defines
  MMCRA_BHRB_DISABLE. Addressed review comments from Jordan to make
  sure existing PMU function (__INIT_PMU) will not overwrite ISA 3.1
  updates

Changes from v2 -> v3
- Addressed review comment from Michael Ellerman to
  call PMU init from __setup_cpu_power10

 arch/powerpc/kernel/cpu_setup_power.S | 19 +++++++++++++++----
 1 file changed, 15 insertions(+), 4 deletions(-)

diff --git a/arch/powerpc/kernel/cpu_setup_power.S b/arch/powerpc/kernel/cpu_setup_power.S
index efdcfa7..3fa6eef 100644
--- a/arch/powerpc/kernel/cpu_setup_power.S
+++ b/arch/powerpc/kernel/cpu_setup_power.S
@@ -94,13 +94,15 @@ _GLOBAL(__restore_cpu_power8)
 _GLOBAL(__setup_cpu_power10)
 	mflr	r11
 	bl	__init_FSCR_power10
+	bl	__init_PMU
+	bl	__init_PMU_ISA31
 	b	1f
 
 _GLOBAL(__setup_cpu_power9)
 	mflr	r11
 	bl	__init_FSCR
-1:	bl	__init_PMU
-	bl	__init_hvmode_206
+	bl	__init_PMU
+1:	bl	__init_hvmode_206
 	mtlr	r11
 	beqlr
 	li	r0,0
@@ -124,13 +126,15 @@ _GLOBAL(__setup_cpu_power9)
 _GLOBAL(__restore_cpu_power10)
 	mflr	r11
 	bl	__init_FSCR_power10
+	bl	__init_PMU
+	bl	__init_PMU_ISA31
 	b	1f
 
 _GLOBAL(__restore_cpu_power9)
 	mflr	r11
 	bl	__init_FSCR
-1:	bl	__init_PMU
-	mfmsr	r3
+	bl	__init_PMU
+1:	mfmsr	r3
 	rldicl.	r0,r3,4,63
 	mtlr	r11
 	beqlr
@@ -233,3 +237,10 @@ __init_PMU_ISA207:
 	li	r5,0
 	mtspr	SPRN_MMCRS,r5
 	blr
+
+__init_PMU_ISA31:
+	li	r5,0
+	mtspr	SPRN_MMCR3,r5
+	LOAD_REG_IMMEDIATE(r5, MMCRA_BHRB_DISABLE)
+	mtspr	SPRN_MMCRA,r5
+	blr
-- 
1.8.3.1

Re: [v4] powerpc/perf: Initialize power10 PMU registers in cpu setup routine

From: Jordan Niethe <hidden>
Date: 2020-07-23 07:44:26 

On Thu, Jul 23, 2020 at 5:32 PM Athira Rajeev
[off-list ref] wrote:
Initialize Monitor Mode Control Register 3 (MMCR3)
SPR which is new in power10. For PowerISA v3.1, BHRB disable
is controlled via Monitor Mode Control Register A (MMCRA) bit,
namely "BHRB Recording Disable (BHRBRD)". This patch also initializes
MMCRA BHRBRD to disable BHRB feature at boot for power10.

Signed-off-by: Athira Rajeev <redacted>
Reviewed-by: Jordan Niethe <redacted>
quoted hunk
---
Dependency:
- On power10 PMU base enablement series V3:
  https://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=190462

Changes from v3 -> v4
- Addressed review comments from Jordan and Michael Ellerman.
  This patch was initially part of Power10 PMU base enablement
  series. Moving this as separate patch as suggested by Michael
  Ellerman. Hence dependency of initial series Patch 7 which defines
  MMCRA_BHRB_DISABLE. Addressed review comments from Jordan to make
  sure existing PMU function (__INIT_PMU) will not overwrite ISA 3.1
  updates

Changes from v2 -> v3
- Addressed review comment from Michael Ellerman to
  call PMU init from __setup_cpu_power10

 arch/powerpc/kernel/cpu_setup_power.S | 19 +++++++++++++++----
 1 file changed, 15 insertions(+), 4 deletions(-)

diff --git a/arch/powerpc/kernel/cpu_setup_power.S b/arch/powerpc/kernel/cpu_setup_power.S
index efdcfa7..3fa6eef 100644
--- a/arch/powerpc/kernel/cpu_setup_power.S
+++ b/arch/powerpc/kernel/cpu_setup_power.S
@@ -94,13 +94,15 @@ _GLOBAL(__restore_cpu_power8)
 _GLOBAL(__setup_cpu_power10)
        mflr    r11
        bl      __init_FSCR_power10
+       bl      __init_PMU
+       bl      __init_PMU_ISA31
        b       1f

 _GLOBAL(__setup_cpu_power9)
        mflr    r11
        bl      __init_FSCR
-1:     bl      __init_PMU
-       bl      __init_hvmode_206
+       bl      __init_PMU
+1:     bl      __init_hvmode_206
        mtlr    r11
        beqlr
        li      r0,0
@@ -124,13 +126,15 @@ _GLOBAL(__setup_cpu_power9)
 _GLOBAL(__restore_cpu_power10)
        mflr    r11
        bl      __init_FSCR_power10
+       bl      __init_PMU
+       bl      __init_PMU_ISA31
        b       1f

 _GLOBAL(__restore_cpu_power9)
        mflr    r11
        bl      __init_FSCR
-1:     bl      __init_PMU
-       mfmsr   r3
+       bl      __init_PMU
+1:     mfmsr   r3
        rldicl. r0,r3,4,63
        mtlr    r11
        beqlr
@@ -233,3 +237,10 @@ __init_PMU_ISA207:
        li      r5,0
        mtspr   SPRN_MMCRS,r5
        blr
+
+__init_PMU_ISA31:
+       li      r5,0
+       mtspr   SPRN_MMCR3,r5
+       LOAD_REG_IMMEDIATE(r5, MMCRA_BHRB_DISABLE)
+       mtspr   SPRN_MMCRA,r5
+       blr
--
1.8.3.1

Re: [v4] powerpc/perf: Initialize power10 PMU registers in cpu setup routine

From: kernel test robot <hidden>
Date: 2020-07-24 03:04:39 

Hi Athira,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on powerpc/next]
[also build test ERROR on v5.8-rc6 next-20200723]
[cannot apply to mpe/next scottwood/next]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Athira-Rajeev/powerpc-perf-Initialize-power10-PMU-registers-in-cpu-setup-routine/20200723-153537
base:   https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
config: powerpc-defconfig (attached as .config)
compiler: powerpc64-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=powerpc 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <redacted>

All errors (new ones prefixed by >>):

   arch/powerpc/kernel/cpu_setup_power.S: Assembler messages:
quoted
arch/powerpc/kernel/cpu_setup_power.S:244: Error: non-constant expression in ".if" statement
arch/powerpc/kernel/cpu_setup_power.S:244: Error: non-constant expression in ".if" statement
arch/powerpc/kernel/cpu_setup_power.S:243: Error: unsupported relocation against SPRN_MMCR3
vim +244 arch/powerpc/kernel/cpu_setup_power.S

    14	
    15	/* Entry: r3 = crap, r4 = ptr to cputable entry
    16	 *
    17	 * Note that we can be called twice for pseudo-PVRs
    18	 */
    19	_GLOBAL(__setup_cpu_power7)
    20		mflr	r11
    21		bl	__init_hvmode_206
    22		mtlr	r11
    23		beqlr
    24		li	r0,0
    25		mtspr	SPRN_LPID,r0
    26		LOAD_REG_IMMEDIATE(r0, PCR_MASK)
    27		mtspr	SPRN_PCR,r0
    28		mfspr	r3,SPRN_LPCR
    29		li	r4,(LPCR_LPES1 >> LPCR_LPES_SH)
    30		bl	__init_LPCR_ISA206
    31		mtlr	r11
    32		blr
    33	
    34	_GLOBAL(__restore_cpu_power7)
    35		mflr	r11
    36		mfmsr	r3
    37		rldicl.	r0,r3,4,63
    38		beqlr
    39		li	r0,0
    40		mtspr	SPRN_LPID,r0
    41		LOAD_REG_IMMEDIATE(r0, PCR_MASK)
    42		mtspr	SPRN_PCR,r0
    43		mfspr	r3,SPRN_LPCR
    44		li	r4,(LPCR_LPES1 >> LPCR_LPES_SH)
    45		bl	__init_LPCR_ISA206
    46		mtlr	r11
    47		blr
    48	
    49	_GLOBAL(__setup_cpu_power8)
    50		mflr	r11
    51		bl	__init_FSCR
    52		bl	__init_PMU
    53		bl	__init_PMU_ISA207
    54		bl	__init_hvmode_206
    55		mtlr	r11
    56		beqlr
    57		li	r0,0
    58		mtspr	SPRN_LPID,r0
    59		LOAD_REG_IMMEDIATE(r0, PCR_MASK)
    60		mtspr	SPRN_PCR,r0
    61		mfspr	r3,SPRN_LPCR
    62		ori	r3, r3, LPCR_PECEDH
    63		li	r4,0 /* LPES = 0 */
    64		bl	__init_LPCR_ISA206
    65		bl	__init_HFSCR
    66		bl	__init_PMU_HV
    67		bl	__init_PMU_HV_ISA207
    68		mtlr	r11
    69		blr
    70	
    71	_GLOBAL(__restore_cpu_power8)
    72		mflr	r11
    73		bl	__init_FSCR
    74		bl	__init_PMU
    75		bl	__init_PMU_ISA207
    76		mfmsr	r3
    77		rldicl.	r0,r3,4,63
    78		mtlr	r11
    79		beqlr
    80		li	r0,0
    81		mtspr	SPRN_LPID,r0
    82		LOAD_REG_IMMEDIATE(r0, PCR_MASK)
    83		mtspr	SPRN_PCR,r0
    84		mfspr   r3,SPRN_LPCR
    85		ori	r3, r3, LPCR_PECEDH
    86		li	r4,0 /* LPES = 0 */
    87		bl	__init_LPCR_ISA206
    88		bl	__init_HFSCR
    89		bl	__init_PMU_HV
    90		bl	__init_PMU_HV_ISA207
    91		mtlr	r11
    92		blr
    93	
    94	_GLOBAL(__setup_cpu_power10)
    95		mflr	r11
    96		bl	__init_FSCR_power10
    97		bl	__init_PMU
    98		bl	__init_PMU_ISA31
    99		b	1f
   100	
   101	_GLOBAL(__setup_cpu_power9)
   102		mflr	r11
   103		bl	__init_FSCR
   104		bl	__init_PMU
   105	1:	bl	__init_hvmode_206
   106		mtlr	r11
   107		beqlr
   108		li	r0,0
   109		mtspr	SPRN_PSSCR,r0
   110		mtspr	SPRN_LPID,r0
   111		mtspr	SPRN_PID,r0
   112		LOAD_REG_IMMEDIATE(r0, PCR_MASK)
   113		mtspr	SPRN_PCR,r0
   114		mfspr	r3,SPRN_LPCR
   115		LOAD_REG_IMMEDIATE(r4, LPCR_PECEDH | LPCR_PECE_HVEE | LPCR_HVICE  | LPCR_HEIC)
   116		or	r3, r3, r4
   117		LOAD_REG_IMMEDIATE(r4, LPCR_UPRT | LPCR_HR)
   118		andc	r3, r3, r4
   119		li	r4,0 /* LPES = 0 */
   120		bl	__init_LPCR_ISA300
   121		bl	__init_HFSCR
   122		bl	__init_PMU_HV
   123		mtlr	r11
   124		blr
   125	
   126	_GLOBAL(__restore_cpu_power10)
   127		mflr	r11
   128		bl	__init_FSCR_power10
   129		bl	__init_PMU
   130		bl	__init_PMU_ISA31
   131		b	1f
   132	
   133	_GLOBAL(__restore_cpu_power9)
   134		mflr	r11
   135		bl	__init_FSCR
   136		bl	__init_PMU
   137	1:	mfmsr	r3
   138		rldicl.	r0,r3,4,63
   139		mtlr	r11
   140		beqlr
   141		li	r0,0
   142		mtspr	SPRN_PSSCR,r0
   143		mtspr	SPRN_LPID,r0
   144		mtspr	SPRN_PID,r0
   145		LOAD_REG_IMMEDIATE(r0, PCR_MASK)
   146		mtspr	SPRN_PCR,r0
   147		mfspr   r3,SPRN_LPCR
   148		LOAD_REG_IMMEDIATE(r4, LPCR_PECEDH | LPCR_PECE_HVEE | LPCR_HVICE | LPCR_HEIC)
   149		or	r3, r3, r4
   150		LOAD_REG_IMMEDIATE(r4, LPCR_UPRT | LPCR_HR)
   151		andc	r3, r3, r4
   152		li	r4,0 /* LPES = 0 */
   153		bl	__init_LPCR_ISA300
   154		bl	__init_HFSCR
   155		bl	__init_PMU_HV
   156		mtlr	r11
   157		blr
   158	
   159	__init_hvmode_206:
   160		/* Disable CPU_FTR_HVMODE and exit if MSR:HV is not set */
   161		mfmsr	r3
   162		rldicl.	r0,r3,4,63
   163		bnelr
   164		ld	r5,CPU_SPEC_FEATURES(r4)
   165		LOAD_REG_IMMEDIATE(r6,CPU_FTR_HVMODE | CPU_FTR_P9_TM_HV_ASSIST)
   166		andc	r5,r5,r6
   167		std	r5,CPU_SPEC_FEATURES(r4)
   168		blr
   169	
   170	__init_LPCR_ISA206:
   171		/* Setup a sane LPCR:
   172		 *   Called with initial LPCR in R3 and desired LPES 2-bit value in R4
   173		 *
   174		 *   LPES = 0b01 (HSRR0/1 used for 0x500)
   175		 *   PECE = 0b111
   176		 *   DPFD = 4
   177		 *   HDICE = 0
   178		 *   VC = 0b100 (VPM0=1, VPM1=0, ISL=0)
   179		 *   VRMASD = 0b10000 (L=1, LP=00)
   180		 *
   181		 * Other bits untouched for now
   182		 */
   183		li	r5,0x10
   184		rldimi	r3,r5, LPCR_VRMASD_SH, 64-LPCR_VRMASD_SH-5
   185	
   186		/* POWER9 has no VRMASD */
   187	__init_LPCR_ISA300:
   188		rldimi	r3,r4, LPCR_LPES_SH, 64-LPCR_LPES_SH-2
   189		ori	r3,r3,(LPCR_PECE0|LPCR_PECE1|LPCR_PECE2)
   190		li	r5,4
   191		rldimi	r3,r5, LPCR_DPFD_SH, 64-LPCR_DPFD_SH-3
   192		clrrdi	r3,r3,1		/* clear HDICE */
   193		li	r5,4
   194		rldimi	r3,r5, LPCR_VC_SH, 0
   195		mtspr	SPRN_LPCR,r3
   196		isync
   197		blr
   198	
   199	__init_FSCR_power10:
   200		mfspr	r3, SPRN_FSCR
   201		ori	r3, r3, FSCR_PREFIX
   202		mtspr	SPRN_FSCR, r3
   203		// fall through
   204	
   205	__init_FSCR:
   206		mfspr	r3,SPRN_FSCR
   207		ori	r3,r3,FSCR_TAR|FSCR_EBB
   208		mtspr	SPRN_FSCR,r3
   209		blr
   210	
   211	__init_HFSCR:
   212		mfspr	r3,SPRN_HFSCR
   213		ori	r3,r3,HFSCR_TAR|HFSCR_TM|HFSCR_BHRB|HFSCR_PM|\
   214			      HFSCR_DSCR|HFSCR_VECVSX|HFSCR_FP|HFSCR_EBB|HFSCR_MSGP
   215		mtspr	SPRN_HFSCR,r3
   216		blr
   217	
   218	__init_PMU_HV:
   219		li	r5,0
   220		mtspr	SPRN_MMCRC,r5
   221		blr
   222	
   223	__init_PMU_HV_ISA207:
   224		li	r5,0
   225		mtspr	SPRN_MMCRH,r5
   226		blr
   227	
   228	__init_PMU:
   229		li	r5,0
   230		mtspr	SPRN_MMCRA,r5
   231		mtspr	SPRN_MMCR0,r5
   232		mtspr	SPRN_MMCR1,r5
   233		mtspr	SPRN_MMCR2,r5
   234		blr
   235	
   236	__init_PMU_ISA207:
   237		li	r5,0
   238		mtspr	SPRN_MMCRS,r5
   239		blr
   240	
   241	__init_PMU_ISA31:
   242		li	r5,0
 > 243		mtspr	SPRN_MMCR3,r5
 > 244		LOAD_REG_IMMEDIATE(r5, MMCRA_BHRB_DISABLE)

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

Re: [v4] powerpc/perf: Initialize power10 PMU registers in cpu setup routine

From: Athira Rajeev <hidden>
Date: 2020-07-24 06:34:19 

On 24-Jul-2020, at 8:32 AM, kernel test robot [off-list ref] wrote:

Hi Athira,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on powerpc/next]
[also build test ERROR on v5.8-rc6 next-20200723]
[cannot apply to mpe/next scottwood/next]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Athira-Rajeev/powerpc-perf-Initialize-power10-PMU-registers-in-cpu-setup-routine/20200723-153537
base:   https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
config: powerpc-defconfig (attached as .config)
compiler: powerpc64-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
       wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
       chmod +x ~/bin/make.cross
       # save the attached .config to linux build tree
       COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=powerpc 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <redacted>

All errors (new ones prefixed by >>):

  arch/powerpc/kernel/cpu_setup_power.S: Assembler messages:
quoted
quoted
arch/powerpc/kernel/cpu_setup_power.S:244: Error: non-constant expression in ".if" statement
arch/powerpc/kernel/cpu_setup_power.S:244: Error: non-constant expression in ".if" statement
arch/powerpc/kernel/cpu_setup_power.S:243: Error: unsupported relocation against SPRN_MMCR3
Hi,

As mentioned in changelog:

This patch was initially part of Power10 PMU base enablement
 series ( https://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=190462 ).
 Moving this as separate patch as suggested by Michael
 Ellerman. Hence there is a dependency on initial series ( Patch 7 ) which defines
 MMCRA_BHRB_DISABLE and new SPR’s. And the build error is because of that.

Thanks
Athira

vim +244 arch/powerpc/kernel/cpu_setup_power.S

   14	
   15	/* Entry: r3 = crap, r4 = ptr to cputable entry
   16	 *
   17	 * Note that we can be called twice for pseudo-PVRs
   18	 */
   19	_GLOBAL(__setup_cpu_power7)
   20		mflr	r11
   21		bl	__init_hvmode_206
   22		mtlr	r11
   23		beqlr
   24		li	r0,0
   25		mtspr	SPRN_LPID,r0
   26		LOAD_REG_IMMEDIATE(r0, PCR_MASK)
   27		mtspr	SPRN_PCR,r0
   28		mfspr	r3,SPRN_LPCR
   29		li	r4,(LPCR_LPES1 >> LPCR_LPES_SH)
   30		bl	__init_LPCR_ISA206
   31		mtlr	r11
   32		blr
   33	
   34	_GLOBAL(__restore_cpu_power7)
   35		mflr	r11
   36		mfmsr	r3
   37		rldicl.	r0,r3,4,63
   38		beqlr
   39		li	r0,0
   40		mtspr	SPRN_LPID,r0
   41		LOAD_REG_IMMEDIATE(r0, PCR_MASK)
   42		mtspr	SPRN_PCR,r0
   43		mfspr	r3,SPRN_LPCR
   44		li	r4,(LPCR_LPES1 >> LPCR_LPES_SH)
   45		bl	__init_LPCR_ISA206
   46		mtlr	r11
   47		blr
   48	
   49	_GLOBAL(__setup_cpu_power8)
   50		mflr	r11
   51		bl	__init_FSCR
   52		bl	__init_PMU
   53		bl	__init_PMU_ISA207
   54		bl	__init_hvmode_206
   55		mtlr	r11
   56		beqlr
   57		li	r0,0
   58		mtspr	SPRN_LPID,r0
   59		LOAD_REG_IMMEDIATE(r0, PCR_MASK)
   60		mtspr	SPRN_PCR,r0
   61		mfspr	r3,SPRN_LPCR
   62		ori	r3, r3, LPCR_PECEDH
   63		li	r4,0 /* LPES = 0 */
   64		bl	__init_LPCR_ISA206
   65		bl	__init_HFSCR
   66		bl	__init_PMU_HV
   67		bl	__init_PMU_HV_ISA207
   68		mtlr	r11
   69		blr
   70	
   71	_GLOBAL(__restore_cpu_power8)
   72		mflr	r11
   73		bl	__init_FSCR
   74		bl	__init_PMU
   75		bl	__init_PMU_ISA207
   76		mfmsr	r3
   77		rldicl.	r0,r3,4,63
   78		mtlr	r11
   79		beqlr
   80		li	r0,0
   81		mtspr	SPRN_LPID,r0
   82		LOAD_REG_IMMEDIATE(r0, PCR_MASK)
   83		mtspr	SPRN_PCR,r0
   84		mfspr   r3,SPRN_LPCR
   85		ori	r3, r3, LPCR_PECEDH
   86		li	r4,0 /* LPES = 0 */
   87		bl	__init_LPCR_ISA206
   88		bl	__init_HFSCR
   89		bl	__init_PMU_HV
   90		bl	__init_PMU_HV_ISA207
   91		mtlr	r11
   92		blr
   93	
   94	_GLOBAL(__setup_cpu_power10)
   95		mflr	r11
   96		bl	__init_FSCR_power10
   97		bl	__init_PMU
   98		bl	__init_PMU_ISA31
   99		b	1f
  100	
  101	_GLOBAL(__setup_cpu_power9)
  102		mflr	r11
  103		bl	__init_FSCR
  104		bl	__init_PMU
  105	1:	bl	__init_hvmode_206
  106		mtlr	r11
  107		beqlr
  108		li	r0,0
  109		mtspr	SPRN_PSSCR,r0
  110		mtspr	SPRN_LPID,r0
  111		mtspr	SPRN_PID,r0
  112		LOAD_REG_IMMEDIATE(r0, PCR_MASK)
  113		mtspr	SPRN_PCR,r0
  114		mfspr	r3,SPRN_LPCR
  115		LOAD_REG_IMMEDIATE(r4, LPCR_PECEDH | LPCR_PECE_HVEE | LPCR_HVICE  | LPCR_HEIC)
  116		or	r3, r3, r4
  117		LOAD_REG_IMMEDIATE(r4, LPCR_UPRT | LPCR_HR)
  118		andc	r3, r3, r4
  119		li	r4,0 /* LPES = 0 */
  120		bl	__init_LPCR_ISA300
  121		bl	__init_HFSCR
  122		bl	__init_PMU_HV
  123		mtlr	r11
  124		blr
  125	
  126	_GLOBAL(__restore_cpu_power10)
  127		mflr	r11
  128		bl	__init_FSCR_power10
  129		bl	__init_PMU
  130		bl	__init_PMU_ISA31
  131		b	1f
  132	
  133	_GLOBAL(__restore_cpu_power9)
  134		mflr	r11
  135		bl	__init_FSCR
  136		bl	__init_PMU
  137	1:	mfmsr	r3
  138		rldicl.	r0,r3,4,63
  139		mtlr	r11
  140		beqlr
  141		li	r0,0
  142		mtspr	SPRN_PSSCR,r0
  143		mtspr	SPRN_LPID,r0
  144		mtspr	SPRN_PID,r0
  145		LOAD_REG_IMMEDIATE(r0, PCR_MASK)
  146		mtspr	SPRN_PCR,r0
  147		mfspr   r3,SPRN_LPCR
  148		LOAD_REG_IMMEDIATE(r4, LPCR_PECEDH | LPCR_PECE_HVEE | LPCR_HVICE | LPCR_HEIC)
  149		or	r3, r3, r4
  150		LOAD_REG_IMMEDIATE(r4, LPCR_UPRT | LPCR_HR)
  151		andc	r3, r3, r4
  152		li	r4,0 /* LPES = 0 */
  153		bl	__init_LPCR_ISA300
  154		bl	__init_HFSCR
  155		bl	__init_PMU_HV
  156		mtlr	r11
  157		blr
  158	
  159	__init_hvmode_206:
  160		/* Disable CPU_FTR_HVMODE and exit if MSR:HV is not set */
  161		mfmsr	r3
  162		rldicl.	r0,r3,4,63
  163		bnelr
  164		ld	r5,CPU_SPEC_FEATURES(r4)
  165		LOAD_REG_IMMEDIATE(r6,CPU_FTR_HVMODE | CPU_FTR_P9_TM_HV_ASSIST)
  166		andc	r5,r5,r6
  167		std	r5,CPU_SPEC_FEATURES(r4)
  168		blr
  169	
  170	__init_LPCR_ISA206:
  171		/* Setup a sane LPCR:
  172		 *   Called with initial LPCR in R3 and desired LPES 2-bit value in R4
  173		 *
  174		 *   LPES = 0b01 (HSRR0/1 used for 0x500)
  175		 *   PECE = 0b111
  176		 *   DPFD = 4
  177		 *   HDICE = 0
  178		 *   VC = 0b100 (VPM0=1, VPM1=0, ISL=0)
  179		 *   VRMASD = 0b10000 (L=1, LP=00)
  180		 *
  181		 * Other bits untouched for now
  182		 */
  183		li	r5,0x10
  184		rldimi	r3,r5, LPCR_VRMASD_SH, 64-LPCR_VRMASD_SH-5
  185	
  186		/* POWER9 has no VRMASD */
  187	__init_LPCR_ISA300:
  188		rldimi	r3,r4, LPCR_LPES_SH, 64-LPCR_LPES_SH-2
  189		ori	r3,r3,(LPCR_PECE0|LPCR_PECE1|LPCR_PECE2)
  190		li	r5,4
  191		rldimi	r3,r5, LPCR_DPFD_SH, 64-LPCR_DPFD_SH-3
  192		clrrdi	r3,r3,1		/* clear HDICE */
  193		li	r5,4
  194		rldimi	r3,r5, LPCR_VC_SH, 0
  195		mtspr	SPRN_LPCR,r3
  196		isync
  197		blr
  198	
  199	__init_FSCR_power10:
  200		mfspr	r3, SPRN_FSCR
  201		ori	r3, r3, FSCR_PREFIX
  202		mtspr	SPRN_FSCR, r3
  203		// fall through
  204	
  205	__init_FSCR:
  206		mfspr	r3,SPRN_FSCR
  207		ori	r3,r3,FSCR_TAR|FSCR_EBB
  208		mtspr	SPRN_FSCR,r3
  209		blr
  210	
  211	__init_HFSCR:
  212		mfspr	r3,SPRN_HFSCR
  213		ori	r3,r3,HFSCR_TAR|HFSCR_TM|HFSCR_BHRB|HFSCR_PM|\
  214			      HFSCR_DSCR|HFSCR_VECVSX|HFSCR_FP|HFSCR_EBB|HFSCR_MSGP
  215		mtspr	SPRN_HFSCR,r3
  216		blr
  217	
  218	__init_PMU_HV:
  219		li	r5,0
  220		mtspr	SPRN_MMCRC,r5
  221		blr
  222	
  223	__init_PMU_HV_ISA207:
  224		li	r5,0
  225		mtspr	SPRN_MMCRH,r5
  226		blr
  227	
  228	__init_PMU:
  229		li	r5,0
  230		mtspr	SPRN_MMCRA,r5
  231		mtspr	SPRN_MMCR0,r5
  232		mtspr	SPRN_MMCR1,r5
  233		mtspr	SPRN_MMCR2,r5
  234		blr
  235	
  236	__init_PMU_ISA207:
  237		li	r5,0
  238		mtspr	SPRN_MMCRS,r5
  239		blr
  240	
  241	__init_PMU_ISA31:
  242		li	r5,0
quoted
243		mtspr	SPRN_MMCR3,r5
244		LOAD_REG_IMMEDIATE(r5, MMCRA_BHRB_DISABLE)
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
<.config.gz>





  

    
Re: [v4] powerpc/perf: Initialize power10 PMU registers in cpu setup routine

    

      From: Michael Ellerman <hidden>

      Date: 2020-07-27 07:31:23 
    

  

  
On Thu, 23 Jul 2020 03:32:37 -0400, Athira Rajeev wrote:
Initialize Monitor Mode Control Register 3 (MMCR3)
SPR which is new in power10. For PowerISA v3.1, BHRB disable
is controlled via Monitor Mode Control Register A (MMCRA) bit,
namely "BHRB Recording Disable (BHRBRD)". This patch also initializes
MMCRA BHRBRD to disable BHRB feature at boot for power10.
Applied to powerpc/next.

[1/1] powerpc/perf: Initialize power10 PMU registers in cpu setup routine
      https://git.kernel.org/powerpc/c/65156f2b1d9d5bf3fd0eac54b0a7fd515c92773c

cheers




    
  

  
    

      

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