From: Fabiano Rosas <farosas@linux.ibm.com>
To: Nicholas Piggin <npiggin@gmail.com>, linuxppc-dev@lists.ozlabs.org
Cc: Nicholas Piggin <npiggin@gmail.com>
Subject: Re: [PATCH 6/6] KVM: PPC: Book3S HV: Remove KVMPPC_NR_LPIDS
Date: Mon, 24 Jan 2022 19:15:15 -0300 [thread overview]
Message-ID: <87a6fkeq6k.fsf@linux.ibm.com> (raw)
In-Reply-To: <20220123120043.3586018-7-npiggin@gmail.com>
Nicholas Piggin <npiggin@gmail.com> writes:
> KVMPPC_NR_LPIDS no longer represents any size restriction on the
> LPID space and can be removed. A CPU with more than 12 LPID bits
> implemented will now be able to create more than 4095 guests.
>
> Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Fabiano Rosas <farosas@linux.ibm.com>
> ---
> arch/powerpc/include/asm/kvm_book3s_asm.h | 3 ---
> arch/powerpc/kvm/book3s_64_mmu_hv.c | 3 ---
> 2 files changed, 6 deletions(-)
>
> diff --git a/arch/powerpc/include/asm/kvm_book3s_asm.h b/arch/powerpc/include/asm/kvm_book3s_asm.h
> index e6bda70b1d93..c8882d9b86c2 100644
> --- a/arch/powerpc/include/asm/kvm_book3s_asm.h
> +++ b/arch/powerpc/include/asm/kvm_book3s_asm.h
> @@ -14,9 +14,6 @@
> #define XICS_MFRR 0xc
> #define XICS_IPI 2 /* interrupt source # for IPIs */
>
> -/* LPIDs we support with this build -- runtime limit may be lower */
> -#define KVMPPC_NR_LPIDS (1UL << 12)
> -
> /* Maximum number of threads per physical core */
> #define MAX_SMT_THREADS 8
>
> diff --git a/arch/powerpc/kvm/book3s_64_mmu_hv.c b/arch/powerpc/kvm/book3s_64_mmu_hv.c
> index f983fb36cbf2..aafd2a74304c 100644
> --- a/arch/powerpc/kvm/book3s_64_mmu_hv.c
> +++ b/arch/powerpc/kvm/book3s_64_mmu_hv.c
> @@ -269,9 +269,6 @@ int kvmppc_mmu_hv_init(void)
> nr_lpids = 1UL << KVM_MAX_NESTED_GUESTS_SHIFT;
> }
>
> - if (nr_lpids > KVMPPC_NR_LPIDS)
> - nr_lpids = KVMPPC_NR_LPIDS;
> -
> if (!cpu_has_feature(CPU_FTR_ARCH_300)) {
> /* POWER7 has 10-bit LPIDs, POWER8 has 12-bit LPIDs */
> if (cpu_has_feature(CPU_FTR_ARCH_207S))
next prev parent reply other threads:[~2022-01-24 22:17 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-23 12:00 [PATCH 0/6] KVM: PPC: Book3S: Make LPID/nested LPID allocations dynamic Nicholas Piggin
2022-01-23 12:00 ` [PATCH 1/6] KVM: PPC: Remove kvmppc_claim_lpid Nicholas Piggin
2022-01-23 12:00 ` [PATCH 2/6] KVM: PPC: Book3S HV: Update LPID allocator init for POWER9, Nested Nicholas Piggin
2022-01-24 22:13 ` Fabiano Rosas
2022-01-23 12:00 ` [PATCH 3/6] KVM: PPC: Book3S HV: Use IDA allocator for LPID allocator Nicholas Piggin
2022-01-24 22:13 ` Fabiano Rosas
2022-01-23 12:00 ` [PATCH 4/6] KVM: PPC: Book3S HV Nested: Change nested guest lookup to use idr Nicholas Piggin
2022-01-24 22:14 ` Fabiano Rosas
2022-01-23 12:00 ` [PATCH 5/6] KVM: PPC: Book3S Nested: Use explicit 4096 LPID maximum Nicholas Piggin
2022-01-24 22:15 ` Fabiano Rosas
2022-01-23 12:00 ` [PATCH 6/6] KVM: PPC: Book3S HV: Remove KVMPPC_NR_LPIDS Nicholas Piggin
2022-01-24 22:15 ` Fabiano Rosas [this message]
2022-05-24 10:51 ` [PATCH 0/6] KVM: PPC: Book3S: Make LPID/nested LPID allocations dynamic Michael Ellerman
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