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Re: [PATCH v4 3/7] arm/mpu: Provide and populate MPU C data structures
- To: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Luca Fancellu <Luca.Fancellu@xxxxxxx>
- Date: Wed, 30 Apr 2025 06:56:00 +0000
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- Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Bertrand Marquis <Bertrand.Marquis@xxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>
- Delivery-date: Wed, 30 Apr 2025 06:56:52 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
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- Thread-index: AQHbuRprYh16Ok81YUq8WQ3ZmeL+z7O7x4MA
- Thread-topic: [PATCH v4 3/7] arm/mpu: Provide and populate MPU C data structures
Hi all,
> diff --git a/xen/arch/arm/include/asm/mpu/regions.inc
> b/xen/arch/arm/include/asm/mpu/regions.inc
> index 47868a152662..dc0306f8c5fc 100644
> --- a/xen/arch/arm/include/asm/mpu/regions.inc
> +++ b/xen/arch/arm/include/asm/mpu/regions.inc
> @@ -1,22 +1,50 @@
> /* SPDX-License-Identifier: GPL-2.0-only */
>
> +#include <asm/bitmap-op.inc>
> #include <asm/mpu.h>
> #include <asm/sysregs.h>
>
> /* Backgroud region enable/disable */
> #define SCTLR_ELx_BR BIT(17, UL)
>
> +#define REGION_DISABLED_PRLAR 0x00 /* NS=0 ATTR=000 EN=0 */
> #define REGION_NORMAL_PRLAR 0x0f /* NS=0 ATTR=111 EN=1 */
> #define REGION_DEVICE_PRLAR 0x09 /* NS=0 ATTR=100 EN=1 */
>
> +#define PRLAR_ELx_EN 0x1
> +
> +#ifdef CONFIG_ARM_64
> +#define XEN_MPUMAP_ENTRY_SHIFT 0x4 /* 16 byte structure */
> +
> +.macro store_pair reg1, reg2, dst
> + stp \reg1, \reg2, [\dst]
> +.endm
> +
> +.macro invalidate_dcache_one reg
> + dc ivac, \reg
> +.endm
> +
> +#else
> +#define XEN_MPUMAP_ENTRY_SHIFT 0x2 /* 8 byte structure */
This should be 0x3, my mistake!
Cheers,
Luca
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