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From: Jordan Niethe <jniethe5@gmail.com>
To: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>,
	mikey@neuling.org, apopple@linux.ibm.com,
	Paul Mackerras <paulus@samba.org>,
	Nicholas Piggin <npiggin@gmail.com>,
	Christophe Leroy <christophe.leroy@c-s.fr>,
	naveen.n.rao@linux.vnet.ibm.com, peterz@infradead.org,
	jolsa@kernel.org, oleg@redhat.com, fweisbec@gmail.com,
	mingo@kernel.org, pedromfc@br.ibm.com, miltonm@us.ibm.com,
	linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v4 04/10] powerpc/watchpoint: Enable watchpoint functionality on power10 guest
Date: Fri, 17 Jul 2020 14:23:03 +1000	[thread overview]
Message-ID: <CACzsE9py0x7wFyG-FgjK-cF8L02OQyOKbqDzP6agFt-Dxc4ejg@mail.gmail.com> (raw)
In-Reply-To: <20200717040958.70561-5-ravi.bangoria@linux.ibm.com>

On Fri, Jul 17, 2020 at 2:10 PM Ravi Bangoria
<ravi.bangoria@linux.ibm.com> wrote:
>
> CPU_FTR_DAWR is by default enabled for host via CPU_FTRS_DT_CPU_BASE
> (controlled by CONFIG_PPC_DT_CPU_FTRS). But cpu-features device-tree
> node is not PAPR compatible and thus not yet used by kvm or pHyp
> guests. Enable watchpoint functionality on power10 guest (both kvm
> and powervm) by adding CPU_FTR_DAWR to CPU_FTRS_POWER10. Note that
> this change does not enable 2nd DAWR support.
>
> Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
I ran the ptrace-hwbreak selftest successfully within a power10 kvm guest.
Tested-by: Jordan Niethe <jniethe5@gmail.com>
> ---
>  arch/powerpc/include/asm/cputable.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/powerpc/include/asm/cputable.h b/arch/powerpc/include/asm/cputable.h
> index bac2252c839e..e506d429b1af 100644
> --- a/arch/powerpc/include/asm/cputable.h
> +++ b/arch/powerpc/include/asm/cputable.h
> @@ -478,7 +478,7 @@ static inline void cpu_feature_keys_init(void) { }
>             CPU_FTR_CFAR | CPU_FTR_HVMODE | CPU_FTR_VMX_COPY | \
>             CPU_FTR_DBELL | CPU_FTR_HAS_PPR | CPU_FTR_ARCH_207S | \
>             CPU_FTR_TM_COMP | CPU_FTR_ARCH_300 | CPU_FTR_PKEY | \
> -           CPU_FTR_ARCH_31)
> +           CPU_FTR_ARCH_31 | CPU_FTR_DAWR)
>  #define CPU_FTRS_CELL  (CPU_FTR_LWSYNC | \
>             CPU_FTR_PPCAS_ARCH_V2 | CPU_FTR_CTRL | \
>             CPU_FTR_ALTIVEC_COMP | CPU_FTR_MMCRA | CPU_FTR_SMT | \
> --
> 2.26.2
>

WARNING: multiple messages have this Message-ID (diff)
From: Jordan Niethe <jniethe5@gmail.com>
To: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Cc: Christophe Leroy <christophe.leroy@c-s.fr>,
	apopple@linux.ibm.com, mikey@neuling.org, miltonm@us.ibm.com,
	peterz@infradead.org, oleg@redhat.com,
	Nicholas Piggin <npiggin@gmail.com>,
	linux-kernel@vger.kernel.org, Paul Mackerras <paulus@samba.org>,
	jolsa@kernel.org, fweisbec@gmail.com, pedromfc@br.ibm.com,
	naveen.n.rao@linux.vnet.ibm.com, linuxppc-dev@lists.ozlabs.org,
	mingo@kernel.org
Subject: Re: [PATCH v4 04/10] powerpc/watchpoint: Enable watchpoint functionality on power10 guest
Date: Fri, 17 Jul 2020 14:23:03 +1000	[thread overview]
Message-ID: <CACzsE9py0x7wFyG-FgjK-cF8L02OQyOKbqDzP6agFt-Dxc4ejg@mail.gmail.com> (raw)
In-Reply-To: <20200717040958.70561-5-ravi.bangoria@linux.ibm.com>

On Fri, Jul 17, 2020 at 2:10 PM Ravi Bangoria
<ravi.bangoria@linux.ibm.com> wrote:
>
> CPU_FTR_DAWR is by default enabled for host via CPU_FTRS_DT_CPU_BASE
> (controlled by CONFIG_PPC_DT_CPU_FTRS). But cpu-features device-tree
> node is not PAPR compatible and thus not yet used by kvm or pHyp
> guests. Enable watchpoint functionality on power10 guest (both kvm
> and powervm) by adding CPU_FTR_DAWR to CPU_FTRS_POWER10. Note that
> this change does not enable 2nd DAWR support.
>
> Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
I ran the ptrace-hwbreak selftest successfully within a power10 kvm guest.
Tested-by: Jordan Niethe <jniethe5@gmail.com>
> ---
>  arch/powerpc/include/asm/cputable.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/powerpc/include/asm/cputable.h b/arch/powerpc/include/asm/cputable.h
> index bac2252c839e..e506d429b1af 100644
> --- a/arch/powerpc/include/asm/cputable.h
> +++ b/arch/powerpc/include/asm/cputable.h
> @@ -478,7 +478,7 @@ static inline void cpu_feature_keys_init(void) { }
>             CPU_FTR_CFAR | CPU_FTR_HVMODE | CPU_FTR_VMX_COPY | \
>             CPU_FTR_DBELL | CPU_FTR_HAS_PPR | CPU_FTR_ARCH_207S | \
>             CPU_FTR_TM_COMP | CPU_FTR_ARCH_300 | CPU_FTR_PKEY | \
> -           CPU_FTR_ARCH_31)
> +           CPU_FTR_ARCH_31 | CPU_FTR_DAWR)
>  #define CPU_FTRS_CELL  (CPU_FTR_LWSYNC | \
>             CPU_FTR_PPCAS_ARCH_V2 | CPU_FTR_CTRL | \
>             CPU_FTR_ALTIVEC_COMP | CPU_FTR_MMCRA | CPU_FTR_SMT | \
> --
> 2.26.2
>

  reply	other threads:[~2020-07-17  4:24 UTC|newest]

Thread overview: 56+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-17  4:09 [PATCH v4 00/10] powerpc/watchpoint: Enable 2nd DAWR on baremetal and powervm Ravi Bangoria
2020-07-17  4:09 ` Ravi Bangoria
2020-07-17  4:09 ` [PATCH v4 01/10] powerpc/watchpoint: Fix 512 byte boundary limit Ravi Bangoria
2020-07-17  4:09   ` Ravi Bangoria
2020-07-17  4:09 ` [PATCH v4 02/10] powerpc/watchpoint: Fix DAWR exception constraint Ravi Bangoria
2020-07-17  4:09   ` Ravi Bangoria
2020-07-17  4:09 ` [PATCH v4 03/10] powerpc/watchpoint: Fix DAWR exception for CACHEOP Ravi Bangoria
2020-07-17  4:09   ` Ravi Bangoria
2020-07-17  4:09 ` [PATCH v4 04/10] powerpc/watchpoint: Enable watchpoint functionality on power10 guest Ravi Bangoria
2020-07-17  4:09   ` Ravi Bangoria
2020-07-17  4:23   ` Jordan Niethe [this message]
2020-07-17  4:23     ` Jordan Niethe
2020-07-17  4:09 ` [PATCH v4 05/10] powerpc/dt_cpu_ftrs: Add feature for 2nd DAWR Ravi Bangoria
2020-07-17  4:09   ` Ravi Bangoria
2020-07-17  5:44   ` Jordan Niethe
2020-07-17  5:44     ` Jordan Niethe
2020-07-21  7:51     ` Ravi Bangoria
2020-07-21  7:51       ` Ravi Bangoria
2020-07-21 11:29       ` Michael Ellerman
2020-07-21 11:29         ` Michael Ellerman
2020-07-21 13:42         ` Ravi Bangoria
2020-07-21 13:42           ` Ravi Bangoria
2020-07-21 14:07           ` Michael Ellerman
2020-07-21 14:07             ` Michael Ellerman
2020-07-21 14:16             ` Ravi Bangoria
2020-07-21 14:16               ` Ravi Bangoria
2020-07-17  4:09 ` [PATCH v4 06/10] powerpc/watchpoint: Set CPU_FTR_DAWR1 based on pa-features bit Ravi Bangoria
2020-07-17  4:09   ` Ravi Bangoria
2020-07-20  1:39   ` Jordan Niethe
2020-07-20  1:39     ` Jordan Niethe
2020-07-17  4:09 ` [PATCH v4 07/10] powerpc/watchpoint: Rename current H_SET_MODE DAWR macro Ravi Bangoria
2020-07-17  4:09   ` Ravi Bangoria
2020-07-20  1:50   ` Jordan Niethe
2020-07-20  1:50     ` Jordan Niethe
2020-07-17  4:09 ` [PATCH v4 08/10] powerpc/watchpoint: Guest support for 2nd DAWR hcall Ravi Bangoria
2020-07-17  4:09   ` Ravi Bangoria
2020-07-17  4:09 ` [PATCH v4 09/10] powerpc/watchpoint: Return available watchpoints dynamically Ravi Bangoria
2020-07-17  4:09   ` Ravi Bangoria
2020-07-20  3:42   ` Jordan Niethe
2020-07-20  3:42     ` Jordan Niethe
2020-07-21  3:57     ` Ravi Bangoria
2020-07-21  3:57       ` Ravi Bangoria
2020-07-21  4:41       ` Jordan Niethe
2020-07-21  4:41         ` Jordan Niethe
2020-07-21  8:15         ` Ravi Bangoria
2020-07-21  8:15           ` Ravi Bangoria
2020-07-21 11:36       ` Michael Ellerman
2020-07-21 11:36         ` Michael Ellerman
2020-07-21 13:33         ` Ravi Bangoria
2020-07-21 13:33           ` Ravi Bangoria
2020-07-17  4:09 ` [PATCH v4 10/10] powerpc/watchpoint: Remove 512 byte boundary Ravi Bangoria
2020-07-17  4:09   ` Ravi Bangoria
2020-07-20  6:54   ` Jordan Niethe
2020-07-20  6:54     ` Jordan Niethe
2020-07-21  3:24     ` Ravi Bangoria
2020-07-21  3:24       ` Ravi Bangoria

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