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Re: [PATCH 6/6] arm/mpu: Implement remove_early_mappings for MPU systems
- To: Hari Limaye <hari.limaye@xxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- From: Ayan Kumar Halder <ayankuma@xxxxxxx>
- Date: Wed, 25 Jun 2025 18:26:32 +0100
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- Cc: luca.fancellu@xxxxxxx, 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, 25 Jun 2025 17:26:45 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
Hi,
On 20/06/2025 10:49, Hari Limaye wrote:
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From: Luca Fancellu <luca.fancellu@xxxxxxx>
Implement remove_early_mappings for MPU systems.
Signed-off-by: Luca Fancellu <luca.fancellu@xxxxxxx>
Signed-off-by: Hari Limaye <hari.limaye@xxxxxxx>
Reviewed-by: Ayan Kumar Halder <ayan.kumar.halder@xxxxxxx>
I have tested the series on R52 and R82 and it works fine.
- Ayan
---
xen/arch/arm/mpu/setup.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/xen/arch/arm/mpu/setup.c b/xen/arch/arm/mpu/setup.c
index ab00cb944b..5928b534d5 100644
--- a/xen/arch/arm/mpu/setup.c
+++ b/xen/arch/arm/mpu/setup.c
@@ -97,7 +97,14 @@ void __init copy_from_paddr(void *dst, paddr_t paddr,
unsigned long len)
void __init remove_early_mappings(void)
{
- BUG_ON("unimplemented");
+ int rc;
+
+ if ( mapped_fdt_paddr == INVALID_PADDR )
+ return;
+
+ rc = destroy_xen_mappings(round_pgdown(mapped_fdt_paddr),
mapped_fdt_limit);
+ if ( rc )
+ panic("Unable to unmap the device-tree.\n");
}
/*
--
2.34.1
|
