From: Suzuki.Poulose@arm.com (Suzuki K. Poulose)
To: linux-arm-kernel@lists.infradead.org
Subject: [RFC PATCH 03/12] arm64: kvm: Cleanup VTCR_EL2/VTTBR computation
Date: Wed, 16 Mar 2016 15:37:18 +0000 [thread overview]
Message-ID: <56E97DAE.2030704@arm.com> (raw)
In-Reply-To: <56E9755C.9090701@arm.com>
On 16/03/16 15:01, Marc Zyngier wrote:
> On 14/03/16 16:53, Suzuki K Poulose wrote:
>> No functional changes. Group the common bits for VCTR_EL2
>> initialisation for better readability. The granule size
>> and the entry level are controlled by the page size.
>>
>> diff --git a/arch/arm64/include/asm/kvm_arm.h b/arch/arm64/include/asm/kvm_arm.h
>> index b7d61e4..d49dd50 100644
>> --- a/arch/arm64/include/asm/kvm_arm.h
>> +++ b/arch/arm64/include/asm/kvm_arm.h
>> @@ -139,32 +139,30 @@
>> * The magic numbers used for VTTBR_X in this patch can be found in Tables
>> * D4-23 and D4-25 in ARM DDI 0487A.b.
>> */
...
>>
>> +#define VTCR_EL2_FLAGS (VTCR_EL2_TGRAN_FLAGS | VTCR_EL2_COMMON_BITS)
>> +#define VTTBR_X ((VTTBR_X_TGRAN_MAGIC) - VTCR_EL2_T0SZ_40B)
>
> Nit: spurious brackets.
Will remove them.
> It would be nice to add an ARMv8 ARM reference to where the "magic"
> value is coming from.
That reference already exists in the code, see above.
>
>> +
>> #define VTTBR_BADDR_SHIFT (VTTBR_X - 1)
>> #define VTTBR_BADDR_MASK (((UL(1) << (PHYS_MASK_SHIFT - VTTBR_X)) - 1) << VTTBR_BADDR_SHIFT)
>> #define VTTBR_VMID_SHIFT (UL(48))
>>
>
> Otherwise:
>
> Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Thanks
Suzuki
next prev parent reply other threads:[~2016-03-16 15:37 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-14 16:52 [RFC PATCH 00/12] kvm-arm: Add stage2 page table walker Suzuki K Poulose
2016-03-14 16:53 ` [RFC PATCH 01/12] kvm arm: Move fake PGD handling to arch specific files Suzuki K Poulose
2016-03-14 16:53 ` [RFC PATCH 02/12] arm64: kvm: Fix {V}TCR_EL2_TG0 mask Suzuki K Poulose
2016-03-16 14:54 ` Marc Zyngier
2016-03-16 15:35 ` Suzuki K. Poulose
2016-03-14 16:53 ` [RFC PATCH 03/12] arm64: kvm: Cleanup VTCR_EL2/VTTBR computation Suzuki K Poulose
2016-03-16 15:01 ` Marc Zyngier
2016-03-16 15:37 ` Suzuki K. Poulose [this message]
2016-03-16 15:45 ` Marc Zyngier
2016-03-14 16:53 ` [RFC PATCH 04/12] kvm-arm: Rename kvm_pmd_huge to huge_pmd Suzuki K Poulose
2016-03-14 17:06 ` Mark Rutland
2016-03-14 17:22 ` Suzuki K. Poulose
2016-03-22 8:55 ` Christoffer Dall
2016-03-22 10:03 ` Suzuki K. Poulose
2016-03-14 16:53 ` [RFC PATCH 05/12] kvm-arm: Move kvm_pud_huge to arch specific headers Suzuki K Poulose
2016-03-14 16:53 ` [RFC PATCH 06/12] kvm-arm: Pass kvm parameter for pagetable helpers Suzuki K Poulose
2016-03-22 9:30 ` Christoffer Dall
2016-03-22 10:15 ` Suzuki K. Poulose
2016-03-22 10:30 ` Christoffer Dall
2016-03-14 16:53 ` [RFC PATCH 07/12] kvm: arm: Introduce stage2 page table helpers Suzuki K Poulose
2016-03-14 16:53 ` [RFC PATCH 08/12] kvm: arm64: " Suzuki K Poulose
2016-03-14 16:53 ` [RFC PATCH 09/12] kvm-arm: Switch to kvm pagetable helpers Suzuki K Poulose
2016-03-14 16:53 ` [RFC PATCH 10/12] kvm: arm64: Get rid of fake page table levels Suzuki K Poulose
2016-03-14 16:53 ` [RFC PATCH 11/12] kvm-arm: Cleanup stage2 pgd handling Suzuki K Poulose
2016-03-14 16:53 ` [RFC PATCH 12/12] arm64: kvm: Add support for 16K pages Suzuki K Poulose
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