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From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>,
	Michael Ellerman <mpe@ellerman.id.au>,
	paulus@samba.org, distroguy@gmail.com
Cc: linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH 65/65] powerpc/mm/radix: Cputable update for radix
Date: Fri, 29 Jun 2018 09:55:12 +1000	[thread overview]
Message-ID: <b07b7b340f0b9682e7622c7488a344b7234ac4e5.camel@kernel.crashing.org> (raw)
In-Reply-To: <8760w165aj.fsf@linux.vnet.ibm.com>

On Fri, 2016-04-01 at 15:04 +0530, Aneesh Kumar K.V wrote:
> 
> commit 9c9d8b4f6a2c2210c90cbb3f5c6d33b2a642e8d2
> Author: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
> Date:   Mon Feb 15 13:44:01 2016 +0530
> 
>     powerpc/mm/radix: Cputable update for radix
>     
>     With P9 Radix we need to do
>     
>     * set UPRT = 1
>     * set different TLB set count
>     
>     In this patch we delay the UPRT=1 to early mmu init. We also update
>     other cpu_spec callback there. The restore cpu callback is used to
>     init secondary cpus and also during opal init. So we do a full
>     radix variant for that, even though the only difference is UPRT=1
>     
>     Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>

How are things working in absence of cputable/PVR match ?

Remember we have a requirement to be able to boot existing OSes on
future chips, so Nick's new cpu-features node needs to be what we
test against.

> diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h
> index b546e6f28d44..3400ed884f10 100644
> --- a/arch/powerpc/include/asm/reg.h
> +++ b/arch/powerpc/include/asm/reg.h
> @@ -347,6 +347,10 @@
>  #define   LPCR_LPES_SH	2
>  #define   LPCR_RMI     0x00000002      /* real mode is cache inhibit */
>  #define   LPCR_HDICE   0x00000001      /* Hyp Decr enable (HV,PR,EE) */
> +/*
> + * Used in asm code, hence we don't want to use PPC_BITCOUNT
> + */
> +#define	  LPCR_UPRT	(ASM_CONST(0x1) << 22)
>  #ifndef SPRN_LPID
>  #define SPRN_LPID	0x13F	/* Logical Partition Identifier */
>  #endif
> diff --git a/arch/powerpc/kernel/cpu_setup_power.S b/arch/powerpc/kernel/cpu_setup_power.S
> index 584e119fa8b0..8d717954d0ca 100644
> --- a/arch/powerpc/kernel/cpu_setup_power.S
> +++ b/arch/powerpc/kernel/cpu_setup_power.S
> @@ -117,6 +117,24 @@ _GLOBAL(__restore_cpu_power9)
>  	mtlr	r11
>  	blr
>  
> +_GLOBAL(__restore_cpu_power9_uprt)
> +	mflr	r11
> +	bl	__init_FSCR
> +	mfmsr	r3
> +	rldicl.	r0,r3,4,63
> +	mtlr	r11
> +	beqlr
> +	li	r0,0
> +	mtspr	SPRN_LPID,r0
> +	mfspr   r3,SPRN_LPCR
> +	ori	r3, r3, LPCR_PECEDH
> +	oris	r3,r3,LPCR_UPRT@h
> +	bl	__init_LPCR
> +	bl	__init_HFSCR
> +	bl	__init_tlb_power7
> +	mtlr	r11
> +	blr
> +
>  __init_hvmode_206:
>  	/* Disable CPU_FTR_HVMODE and exit if MSR:HV is not set */
>  	mfmsr	r3
> diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
> index 6c662b8de90d..e009722d5914 100644
> --- a/arch/powerpc/kernel/cputable.c
> +++ b/arch/powerpc/kernel/cputable.c
> @@ -514,7 +514,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
>  		.cpu_features		= CPU_FTRS_POWER9,
>  		.cpu_user_features	= COMMON_USER_POWER9,
>  		.cpu_user_features2	= COMMON_USER2_POWER9,
> -		.mmu_features		= MMU_FTRS_POWER9,
> +		.mmu_features		= MMU_FTRS_POWER9 | MMU_FTR_RADIX,
>  		.icache_bsize		= 128,
>  		.dcache_bsize		= 128,
>  		.num_pmcs		= 6,
> diff --git a/arch/powerpc/kernel/mce_power.c b/arch/powerpc/kernel/mce_power.c
> index 92a66a2a9b85..f902ede263ab 100644
> --- a/arch/powerpc/kernel/mce_power.c
> +++ b/arch/powerpc/kernel/mce_power.c
> @@ -75,6 +75,10 @@ void __flush_tlb_power9(unsigned int action)
>  	flush_tlb_206(POWER9_TLB_SETS_HASH, action);
>  }
>  
> +void __flush_tlb_power9_radix(unsigned int action)
> +{
> +	flush_tlb_206(POWER9_TLB_SETS_RADIX, action);
> +}
>  
>  /* flush SLBs and reload */
>  #ifdef CONFIG_PPC_MMU_STD_64
> diff --git a/arch/powerpc/mm/pgtable-radix.c b/arch/powerpc/mm/pgtable-radix.c
> index bb1eb7d0911c..6e56051bf825 100644
> --- a/arch/powerpc/mm/pgtable-radix.c
> +++ b/arch/powerpc/mm/pgtable-radix.c
> @@ -294,8 +294,20 @@ found:
>  	return;
>  }
>  
> +extern void __restore_cpu_power9_uprt(void);
> +extern void __flush_tlb_power9_radix(unsigned int action);
>  void __init rearly_init_mmu(void)
>  {
> +	unsigned long lpcr;
> +	/*
> +	 * setup LPCR UPRT based on mmu_features
> +	 */
> +	lpcr = mfspr(SPRN_LPCR);
> +	mtspr(SPRN_LPCR, lpcr | LPCR_UPRT);
> +	/* update cpu_spec to point to radix enabled callbacks */
> +	cur_cpu_spec->cpu_restore = __restore_cpu_power9_uprt;
> +	cur_cpu_spec->flush_tlb   = __flush_tlb_power9_radix;
> +
>  #ifdef CONFIG_PPC_64K_PAGES
>  	/* PAGE_SIZE mappings */
>  	mmu_virtual_psize = MMU_PAGE_64K;

  reply	other threads:[~2018-06-28 23:55 UTC|newest]

Thread overview: 92+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-03-27  8:23 [PATCH 01/65] powerpc/mm: Use big endian page table for book3s 64 Aneesh Kumar K.V
2016-03-27  8:23 ` [PATCH 02/65] powerpc/mm: use _PAGE_READ to indicate Read access Aneesh Kumar K.V
2016-03-27 15:35   ` Ian Munsie
2016-03-31  0:57   ` Balbir Singh
2016-04-04 14:55     ` Aneesh Kumar K.V
2016-04-05  3:25       ` Balbir Singh
2016-03-27  8:23 ` [PATCH 03/65] powerpc/mm/subpage: Clear RWX bit to indicate no access Aneesh Kumar K.V
2016-03-31  1:42   ` Balbir Singh
2016-04-04 14:59     ` Aneesh Kumar K.V
2016-04-05  3:30       ` Balbir Singh
2016-03-27  8:23 ` [PATCH 04/65] powerpc/mm: Use pte_user instead of opencoding Aneesh Kumar K.V
2016-03-31  1:45   ` Balbir Singh
2016-04-04 15:00     ` Aneesh Kumar K.V
2016-03-27  8:23 ` [PATCH 05/65] powerpc/mm: Replace _PAGE_USER with _PAGE_PRIVILEGED Aneesh Kumar K.V
2016-03-27 15:41   ` Ian Munsie
2016-03-27  8:23 ` [PATCH 06/65] powerpc/cxl: Use REGION_ID instead of opencoding Aneesh Kumar K.V
2016-03-27 15:48   ` Ian Munsie
2016-03-27  8:23 ` [PATCH 07/65] powerpc/mm: Remove RPN_SHIFT and RPN_SIZE Aneesh Kumar K.V
2016-03-27  8:23 ` [PATCH 08/65] powerpc/mm: Update _PAGE_KERNEL_RO Aneesh Kumar K.V
2016-04-05  7:45   ` Balbir Singh
2016-03-27  8:23 ` [PATCH 09/65] powerpc/mm: Use helper for finding pte bits mapping I/O area Aneesh Kumar K.V
2016-04-05 11:47   ` Balbir Singh
2016-03-27  8:23 ` [PATCH 10/65] powerpc/mm: Drop WIMG in favour of new constants Aneesh Kumar K.V
2016-04-05 13:25   ` Balbir Singh
2016-03-27  8:23 ` [PATCH 11/65] powerpc/mm: Use generic version of pmdp_clear_flush_young Aneesh Kumar K.V
2016-04-05 23:51   ` Balbir Singh
2016-03-27  8:23 ` [PATCH 12/65] powerpc/mm: Use generic version of ptep_clear_flush_young Aneesh Kumar K.V
2016-04-05 23:53   ` Balbir Singh
2016-03-27  8:23 ` [PATCH 13/65] powerpc/mm: Move common data structure between radix and hash to book3s 64 generic headers Aneesh Kumar K.V
2016-03-27  8:23 ` [PATCH 14/65] powerpc/mm/power9: Add partition table format Aneesh Kumar K.V
2016-04-06  6:11   ` Balbir Singh
2016-03-27  8:23 ` [PATCH 15/65] powerpc/mm/hash: Add support for POWER9 hash Aneesh Kumar K.V
2016-03-27  8:23 ` [PATCH 16/65] powerpc/mm: Move hash and no hash code to separate files Aneesh Kumar K.V
2016-03-27  8:23 ` [PATCH 17/65] powerpc/mm/book3s: Rename hash specific PTE bits to carry H_ prefix Aneesh Kumar K.V
2016-03-27  8:23 ` [PATCH 18/65] powerpc/mm: Handle _PTE_NONE_MASK Aneesh Kumar K.V
2016-03-27  8:23 ` [PATCH 19/65] powerpc/mm: Move common pte bits and accessors to book3s/64/pgtable.h Aneesh Kumar K.V
2016-03-27  8:23 ` [PATCH 20/65] powerpc/mm: Move pte accessors that operate on common pte bits to pgtable.h Aneesh Kumar K.V
2016-03-27  8:23 ` [PATCH 21/65] powerpc/mm: Make page table size a variable Aneesh Kumar K.V
2016-03-27  8:23 ` [PATCH 22/65] powerpc/mm: Move page table index and and vaddr to pgtable.h Aneesh Kumar K.V
2016-03-27  8:23 ` [PATCH 23/65] powerpc/mm: Move pte related function together Aneesh Kumar K.V
2016-03-27  8:23 ` [PATCH 24/65] powerpc/mm/radix: Add radix pte defines Aneesh Kumar K.V
2016-03-27  8:23 ` [PATCH 25/65] powerpc/mm/radix: Dummy radix_enabled() Aneesh Kumar K.V
2016-03-27  8:23 ` [PATCH 26/65] powerpc/mm: Add radix callbacks to pte accessors Aneesh Kumar K.V
2016-03-27  8:23 ` [PATCH 27/65] powerpc/mm: Move hugetlb and THP related pmd accessors to pgtable.h Aneesh Kumar K.V
2016-03-27  8:23 ` [PATCH 28/65] powerpc/mm/radix: Add radix callback for pmd accessors Aneesh Kumar K.V
2016-03-27  8:23 ` [PATCH 29/65] powerpc/mm: Abstraction for early init routines Aneesh Kumar K.V
2016-03-27  8:23 ` [PATCH 30/65] powerpc/mm/radix: Add radix callback " Aneesh Kumar K.V
2016-03-27  8:23 ` [PATCH 31/65] powerpc/mm: Abstraction for vmemmap and map_kernel_page Aneesh Kumar K.V
2016-03-27  8:23 ` [PATCH 32/65] powerpc/mm/radix: Add radix callback for vmemmap and map_kernel page Aneesh Kumar K.V
2016-03-27  8:23 ` [PATCH 33/65] powerpc/mm: Abstraction for switch_mmu_context Aneesh Kumar K.V
2016-03-27  8:23 ` [PATCH 34/65] powerpc/mm/radix: Add mmu context handling callback for radix Aneesh Kumar K.V
2016-03-27  8:23 ` [PATCH 35/65] powerpc/mm: Rename mmu_context_hash64.c to mmu_context_book3s64.c Aneesh Kumar K.V
2016-03-27  8:23 ` [PATCH 36/65] powerpc/mm: Hash linux abstraction for tlbflush routines Aneesh Kumar K.V
2016-03-27  8:23 ` [PATCH 37/65] powerpc/mm/radix: Add " Aneesh Kumar K.V
2016-03-27 10:00   ` kbuild test robot
2016-03-28 17:58     ` Aneesh Kumar K.V
2016-03-27 10:09   ` kbuild test robot
2016-03-27 10:11   ` kbuild test robot
2016-03-27  8:23 ` [PATCH 38/65] powerpc/mm/radix: Add MMU_FTR_RADIX Aneesh Kumar K.V
2016-03-27  8:23 ` [PATCH 39/65] powerpc/mm/radix: Use STD_MMU_64 to properly isolate hash related code Aneesh Kumar K.V
2016-03-27  8:23 ` [PATCH 40/65] powerpc/mm/radix: Isolate hash table function from pseries guest code Aneesh Kumar K.V
2016-03-27  8:23 ` [PATCH 41/65] powerpc/mm/radix: Add checks in slice code to catch radix usage Aneesh Kumar K.V
2016-03-27  8:23 ` [PATCH 42/65] powerpc/mm/radix: Limit paca allocation in radix Aneesh Kumar K.V
2016-03-27  8:23 ` [PATCH 43/65] powerpc/mm/radix: Pick the address layout for radix config Aneesh Kumar K.V
2016-03-27  8:23 ` [PATCH 44/65] powerpc/mm/radix: Update secondary PTCR Aneesh Kumar K.V
2016-03-27  8:23 ` [PATCH 45/65] powerpc/mm: Make a copy of pgalloc.h for 32 and 64 book3s Aneesh Kumar K.V
2016-03-27  8:23 ` [PATCH 46/65] powerpc/mm: revert changes made to generic pgalloc-64.h Aneesh Kumar K.V
2016-03-27  8:23 ` [PATCH 47/65] powerpc/mm: Copy pgalloc (part 2) Aneesh Kumar K.V
2016-03-27  8:23 ` [PATCH 48/65] powerpc/mm: Simplify the code dropping 4 level table #ifdef Aneesh Kumar K.V
2016-03-27  8:23 ` [PATCH 49/65] powerpc/mm: Rename function to indicate we are allocating fragments Aneesh Kumar K.V
2016-03-27  8:23 ` [PATCH 50/65] powerpc/mm: make 4k and 64k use pte_t for pgtable_t Aneesh Kumar K.V
2016-03-27  8:23 ` [PATCH 51/65] powerpc/mm: Add radix pgalloc details Aneesh Kumar K.V
2016-03-27  8:24 ` [PATCH 52/65] powerpc/mm: Update pte filter for radix Aneesh Kumar K.V
2016-03-27  8:24 ` [PATCH 53/65] powerpc/mm: VMALLOC abstraction Aneesh Kumar K.V
2016-03-27  8:24 ` [PATCH 54/65] powerpc/radix: update mmu cache Aneesh Kumar K.V
2016-03-27  8:24 ` [PATCH 55/65] powerpc/mm: pte_frag abstraction Aneesh Kumar K.V
2016-03-27  8:24 ` [PATCH 56/65] powerpc/mm: Fix vma_mmu_pagesize for radix Aneesh Kumar K.V
2016-03-27  8:24 ` [PATCH 57/65] powerpc/mm: Add radix support for hugetlb Aneesh Kumar K.V
2016-03-27  8:24 ` [PATCH 58/65] powerpc/mm/radix: Make sure swapper pgdir is properly aligned Aneesh Kumar K.V
2016-03-27  8:24 ` [PATCH 59/65] powerpc/mm/radix: Add hugetlb support 4K page size Aneesh Kumar K.V
2016-03-27  8:24 ` [PATCH 60/65] powerpc/mm: Drop PTE_ATOMIC_UPDATES from pmd_hugepage_update Aneesh Kumar K.V
2016-03-27  8:24 ` [PATCH 61/65] powerpc/mm: THP is only available on hash64 as of now Aneesh Kumar K.V
2016-03-27  8:24 ` [PATCH 62/65] powerpc/mm/thp: Abstraction for THP functions Aneesh Kumar K.V
2016-03-27  8:24 ` [PATCH 63/65] powerpc/mm/radix: Add radix THP callbacks Aneesh Kumar K.V
2016-03-27  8:24 ` [PATCH 64/65] powerpc/mm/radix: Add THP support for 4k linux page size Aneesh Kumar K.V
2016-03-27  8:24 ` [PATCH 65/65] powerpc/mm/radix: Cputable update for radix Aneesh Kumar K.V
2016-03-30  1:01   ` Michael Neuling
2016-04-01  6:25   ` Michael Ellerman
2016-04-01  9:34     ` Aneesh Kumar K.V
2018-06-28 23:55       ` Benjamin Herrenschmidt [this message]
2016-03-30 10:53 ` [PATCH 01/65] powerpc/mm: Use big endian page table for book3s 64 Balbir Singh
2016-04-04 15:03   ` Aneesh Kumar K.V

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