From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from eggs.gnu.org ([2001:4830:134:3::10]:44237)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <paolo.bonzini@gmail.com>) id 1WQIm3-0003F8-Ik
	for qemu-devel@nongnu.org; Wed, 19 Mar 2014 11:51:30 -0400
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <paolo.bonzini@gmail.com>) id 1WQIlw-0002FW-4e
	for qemu-devel@nongnu.org; Wed, 19 Mar 2014 11:51:23 -0400
Sender: Paolo Bonzini <paolo.bonzini@gmail.com>
Message-ID: <5329BCBD.2090809@redhat.com>
Date: Wed, 19 Mar 2014 16:50:21 +0100
From: Paolo Bonzini <pbonzini@redhat.com>
MIME-Version: 1.0
References: <1394805109-22671-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com>
In-Reply-To: <1394805109-22671-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Subject: Re: [Qemu-devel] [PATCH] target-ppc: Fix h_enter to loop correctly
List-Id: <qemu-devel.nongnu.org>
List-Unsubscribe: <https://lists.nongnu.org/mailman/options/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>
List-Archive: <http://lists.nongnu.org/archive/html/qemu-devel>
List-Post: <mailto:qemu-devel@nongnu.org>
List-Help: <mailto:qemu-devel-request@nongnu.org?subject=help>
List-Subscribe: <https://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=subscribe>
To: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>, agraf@suse.de, paulus@samba.org
Cc: qemu-ppc@nongnu.org, qemu-devel@nongnu.org

Il 14/03/2014 14:51, Aneesh Kumar K.V ha scritto:
> From: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
>
> We wanted to loop till index is 8. On 8 we return with H_PTEG_FULL. If we are
> successful in loading hpte with any other index, we continue with that
> index value.
>
> Reported-by: Paolo Bonzini <pbonzini@redhat.com>
> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
> ---
>  hw/ppc/spapr_hcall.c | 11 +++++------
>  1 file changed, 5 insertions(+), 6 deletions(-)
>
> diff --git a/hw/ppc/spapr_hcall.c b/hw/ppc/spapr_hcall.c
> index e999bbaea062..2ab55d568bf4 100644
> --- a/hw/ppc/spapr_hcall.c
> +++ b/hw/ppc/spapr_hcall.c
> @@ -110,16 +110,15 @@ static target_ulong h_enter(PowerPCCPU *cpu, sPAPREnvironment *spapr,
>      if (likely((flags & H_EXACT) == 0)) {
>          pte_index &= ~7ULL;
>          token = ppc_hash64_start_access(cpu, pte_index);
> -        do {
> -            if (index == 8) {
> -                ppc_hash64_stop_access(token);
> -                return H_PTEG_FULL;
> -            }
> +        for (; index < 8; index++) {
>              if ((ppc_hash64_load_hpte0(env, token, index) & HPTE64_V_VALID) == 0) {
>                  break;
>              }
> -        } while (index++);
> +        }
>          ppc_hash64_stop_access(token);
> +        if (index == 8) {
> +            return H_PTEG_FULL;
> +        }
>      } else {
>          token = ppc_hash64_start_access(cpu, pte_index);
>          if (ppc_hash64_load_hpte0(env, token, 0) & HPTE64_V_VALID) {
>

Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>