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Wed, 13 Sep 2023 19:17:44 -0700 (PDT) From: Leo Yan To: xen-devel@lists.xenproject.org Cc: Stefano Stabellini , Julien Grall , Bertrand Marquis , Volodymyr Babchuk , Alexey Klimov , Leo Yan Subject: [PATCH v3 1/2] xen/arm: Add macro XEN_VM_MAPPING Date: Thu, 14 Sep 2023 10:17:33 +0800 Message-Id: <20230914021734.1395472-2-leo.yan@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230914021734.1395472-1-leo.yan@linaro.org> References: <20230914021734.1395472-1-leo.yan@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1694657909483100001 Content-Type: text/plain; charset="utf-8" Xen maps the virtual memory space starting from L0 slot 4, so it's open coded for macros with the offset '4'. For more readable, add a new macro XEN_VM_MAPPING which defines the start slot for Xen virtual memory mapping, and all virtual memory regions are defined based on it. Signed-off-by: Leo Yan Acked-by: Julien Grall --- xen/arch/arm/include/asm/mmu/layout.h | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/xen/arch/arm/include/asm/mmu/layout.h b/xen/arch/arm/include/a= sm/mmu/layout.h index da6be276ac..2cb2382fbf 100644 --- a/xen/arch/arm/include/asm/mmu/layout.h +++ b/xen/arch/arm/include/asm/mmu/layout.h @@ -49,11 +49,14 @@ #define XEN_VIRT_START _AT(vaddr_t, MB(2)) #else =20 +#define IDENTITY_MAPPING_AREA_NR_L0 4 +#define XEN_VM_MAPPING SLOT0(IDENTITY_MAPPING_AREA_NR_L0) + #define SLOT0_ENTRY_BITS 39 #define SLOT0(slot) (_AT(vaddr_t,slot) << SLOT0_ENTRY_BITS) #define SLOT0_ENTRY_SIZE SLOT0(1) =20 -#define XEN_VIRT_START (SLOT0(4) + _AT(vaddr_t, MB(2))) +#define XEN_VIRT_START (XEN_VM_MAPPING + _AT(vaddr_t, MB(2))) #endif =20 /* @@ -116,12 +119,10 @@ =20 #else /* ARM_64 */ =20 -#define IDENTITY_MAPPING_AREA_NR_L0 4 - -#define VMAP_VIRT_START (SLOT0(4) + GB(1)) +#define VMAP_VIRT_START (XEN_VM_MAPPING + GB(1)) #define VMAP_VIRT_SIZE GB(1) =20 -#define FRAMETABLE_VIRT_START (SLOT0(4) + GB(32)) +#define FRAMETABLE_VIRT_START (XEN_VM_MAPPING + GB(32)) #define FRAMETABLE_SIZE GB(32) #define FRAMETABLE_NR (FRAMETABLE_SIZE / sizeof(*frame_table)) =20 --=20 2.34.1