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Re: [PATCH for-5.2 v4 05/11] hw/arm/smmu-common: Manage IOTLB block entr
From: |
Peter Maydell |
Subject: |
Re: [PATCH for-5.2 v4 05/11] hw/arm/smmu-common: Manage IOTLB block entries |
Date: |
Thu, 30 Jul 2020 14:38:53 +0100 |
On Tue, 28 Jul 2020 at 16:09, Eric Auger <eric.auger@redhat.com> wrote:
>
> At the moment each entry in the IOTLB corresponds to a page sized
> mapping (4K, 16K or 64K), even if the page belongs to a mapped
> block. In case of block mapping this unefficiently consumes IOTLB
> entries.
>
> Change the value of the entry so that it reflects the actual
> mapping it belongs to (block or page start address and size).
>
> Also the level/tg of the entry is encoded in the key. In subsequent
> patches we will enable range invalidation. This latter is able
> to provide the level/tg of the entry.
>
> Encoding the level/tg directly in the key will allow to invalidate
> using g_hash_table_remove() when num_pages equals to 1.
>
> Signed-off-by: Eric Auger <eric.auger@redhat.com>
>
> ---
> v3 -> v4:
> - also use the tg field when computing the hash
> - in the key equal function, compare the fields instead of
> using memcmp()
> - fixed a couple of indents
> - added Peter's R-b
You say that, but you didn't :-)
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
thanks
-- PMM
- [PATCH for-5.2 v4 00/11] SMMUv3.2 Range-based TLB Invalidation Support, Eric Auger, 2020/07/28
- [PATCH for-5.2 v4 01/11] hw/arm/smmu-common: Factorize some code in smmu_ptw_64(), Eric Auger, 2020/07/28
- [PATCH for-5.2 v4 02/11] hw/arm/smmu-common: Add IOTLB helpers, Eric Auger, 2020/07/28
- [PATCH for-5.2 v4 03/11] hw/arm/smmu: Introduce smmu_get_iotlb_key(), Eric Auger, 2020/07/28
- [PATCH for-5.2 v4 04/11] hw/arm/smmu: Introduce SMMUTLBEntry for PTW and IOTLB value, Eric Auger, 2020/07/28
- [PATCH for-5.2 v4 05/11] hw/arm/smmu-common: Manage IOTLB block entries, Eric Auger, 2020/07/28
- Re: [PATCH for-5.2 v4 05/11] hw/arm/smmu-common: Manage IOTLB block entries,
Peter Maydell <=
- [PATCH for-5.2 v4 07/11] hw/arm/smmuv3: Get prepared for range invalidation, Eric Auger, 2020/07/28
- [PATCH for-5.2 v4 08/11] hw/arm/smmuv3: Fix IIDR offset, Eric Auger, 2020/07/28
- [PATCH for-5.2 v4 09/11] hw/arm/smmuv3: Let AIDR advertise SMMUv3.0 support, Eric Auger, 2020/07/28
- [PATCH for-5.2 v4 10/11] hw/arm/smmuv3: Support HAD and advertise SMMUv3.1 support, Eric Auger, 2020/07/28
- [PATCH for-5.2 v4 06/11] hw/arm/smmuv3: Introduce smmuv3_s1_range_inval() helper, Eric Auger, 2020/07/28
- [PATCH for-5.2 v4 11/11] hw/arm/smmuv3: Advertise SMMUv3.2 range invalidation, Eric Auger, 2020/07/28
- Re: [PATCH for-5.2 v4 00/11] SMMUv3.2 Range-based TLB Invalidation Support, Peter Maydell, 2020/07/30