From: Balbir Singh <bsingharora@gmail.com>
To: Michael Ellerman <mpe@ellerman.id.au>,
Michael Neuling <mikey@neuling.org>
Cc: linuxppc-dev@lists.ozlabs.org, aneesh.kumar@linux.vnet.ibm.com
Subject: Re: [PATCH v2] powerpc/mm/radix: Invalidate ERAT on tlbiel for POWER9 DD1
Date: Wed, 16 Nov 2016 22:02:13 +1100 [thread overview]
Message-ID: <426fb387-a925-04f3-1027-7e347e2885bb@gmail.com> (raw)
In-Reply-To: <87lgwjy9x5.fsf@concordia.ellerman.id.au>
On 16/11/16 21:51, Michael Ellerman wrote:
> Michael Neuling <mikey@neuling.org> writes:
>> diff --git a/arch/powerpc/mm/tlb-radix.c b/arch/powerpc/mm/tlb-radix.c
>> index bda8c43be7..4a19cdd8a0 100644
>> --- a/arch/powerpc/mm/tlb-radix.c
>> +++ b/arch/powerpc/mm/tlb-radix.c
>> @@ -50,6 +50,9 @@ static inline void _tlbiel_pid(unsigned long pid, unsigned long ric)
>> for (set = 0; set < POWER9_TLB_SETS_RADIX ; set++) {
>> __tlbiel_pid(pid, set, ric);
>> }
>> + if (cpu_has_feature(CPU_FTR_POWER9_DD1))
>> + asm volatile(PPC_SLBIA(0x7)
>> + : : :"memory");
>
> Ah of course I'll use slbia to invalidate the ERAT.
>
> How about we do:
>
> #define PPC_INVALIDATE_ERAT PPC_SLBIA(0x7)
>
While you are at it, could you also add a TODO
to use a HCALL when LPCR_GTSE is not set
(when running in guest mode)
Balbir Singh.
next prev parent reply other threads:[~2016-11-16 11:02 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-16 5:23 [PATCH v2] powerpc/mm/radix: Invalidate ERAT on tlbiel for POWER9 DD1 Michael Neuling
2016-11-16 10:51 ` Michael Ellerman
2016-11-16 11:02 ` Balbir Singh [this message]
2016-11-16 11:28 ` Aneesh Kumar K.V
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