From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoffer Dall Subject: Re: [PATCH 02/17] arm64: Cleanup VTCR_EL2 and VTTBR field values Date: Fri, 8 Apr 2016 14:43:46 +0200 Message-ID: <20160408124346.GN8961@cbox> References: <1459787177-12767-1-git-send-email-suzuki.poulose@arm.com> <1459787177-12767-3-git-send-email-suzuki.poulose@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: kvm@vger.kernel.org, marc.zyngier@arm.com, catalin.marinas@arm.com, will.deacon@arm.com, linux-kernel@vger.kernel.org, kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org To: Suzuki K Poulose Return-path: Content-Disposition: inline In-Reply-To: <1459787177-12767-3-git-send-email-suzuki.poulose@arm.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu List-Id: kvm.vger.kernel.org On Mon, Apr 04, 2016 at 05:26:02PM +0100, Suzuki K Poulose wrote: > We share most of the bits for VTCR_EL2 for different page sizes, > except for the TG0 value and the entry level value. This patch > makes the definitions a bit more cleaner to reflect this fact. > > Also cleans up the VTTBR_X calculation. No funcational changes. > > Cc: Marc Zyngier > Cc: Christoffer Dall > Signed-off-by: Suzuki K Poulose > --- > arch/arm64/include/asm/kvm_arm.h | 23 +++++++++++------------ > 1 file changed, 11 insertions(+), 12 deletions(-) > > diff --git a/arch/arm64/include/asm/kvm_arm.h b/arch/arm64/include/asm/kvm_arm.h > index c460cfe..d5d5fdf 100644 > --- a/arch/arm64/include/asm/kvm_arm.h > +++ b/arch/arm64/include/asm/kvm_arm.h > @@ -144,32 +144,31 @@ > * 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_T0SZ_IPA VTCR_EL2_T0SZ_40B > +#define VTCR_EL2_COMMON_BITS (VTCR_EL2_SH0_INNER | VTCR_EL2_ORGN0_WBWA | \ > + VTCR_EL2_IRGN0_WBWA | VTCR_EL2_SL0_LVL1 | \ > + VTCR_EL2_RES1 | VTCR_EL2_T0SZ_IPA) > #ifdef CONFIG_ARM64_64K_PAGES > /* > * Stage2 translation configuration: > - * 40bits input (T0SZ = 24) > * 64kB pages (TG0 = 1) > * 2 level page tables (SL = 1) > */ > -#define VTCR_EL2_FLAGS (VTCR_EL2_TG0_64K | VTCR_EL2_SH0_INNER | \ > - VTCR_EL2_ORGN0_WBWA | VTCR_EL2_IRGN0_WBWA | \ > - VTCR_EL2_SL0_LVL1 | VTCR_EL2_T0SZ_40B | \ > - VTCR_EL2_RES1) > -#define VTTBR_X (38 - VTCR_EL2_T0SZ_40B) > +#define VTCR_EL2_TGRAN_FLAGS (VTCR_EL2_TG0_64K | VTCR_EL2_SL0_LVL1) > +#define VTTBR_X_TGRAN_MAGIC 38 > #else > /* > * Stage2 translation configuration: > - * 40bits input (T0SZ = 24) > * 4kB pages (TG0 = 0) > * 3 level page tables (SL = 1) > */ > -#define VTCR_EL2_FLAGS (VTCR_EL2_TG0_4K | VTCR_EL2_SH0_INNER | \ > - VTCR_EL2_ORGN0_WBWA | VTCR_EL2_IRGN0_WBWA | \ > - VTCR_EL2_SL0_LVL1 | VTCR_EL2_T0SZ_40B | \ > - VTCR_EL2_RES1) > -#define VTTBR_X (37 - VTCR_EL2_T0SZ_40B) > +#define VTCR_EL2_TGRAN_FLAGS (VTCR_EL2_TG0_4K | VTCR_EL2_SL0_LVL1) > +#define VTTBR_X_TGRAN_MAGIC 37 > #endif why do we add VTCR_EL2_SL0_LVL1 in both the common bits and TGRAN_FLAGS define? Otherwise: Reviewed-by: Christoffer Dall > > +#define VTCR_EL2_FLAGS (VTCR_EL2_TGRAN_FLAGS | VTCR_EL2_COMMON_BITS) > +#define VTTBR_X (VTTBR_X_TGRAN_MAGIC - VTCR_EL2_T0SZ_IPA) > + > #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)) > -- > 1.7.9.5 >