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Re: [PATCH 11/22] x86: add a boot option to enable and disable the direct map
- To: Stefano Stabellini <sstabellini@xxxxxxxxxx>
- From: Julien Grall <julien@xxxxxxx>
- Date: Mon, 23 Jan 2023 22:01:55 +0000
- Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx, Hongyan Xia <hongyxia@xxxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, George Dunlap <george.dunlap@xxxxxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>, Wei Liu <wl@xxxxxxx>, Bertrand Marquis <bertrand.marquis@xxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Julien Grall <jgrall@xxxxxxxxxx>
- Delivery-date: Mon, 23 Jan 2023 22:02:07 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
Hi Stefano,
On 23/01/2023 21:45, Stefano Stabellini wrote:
diff --git a/xen/arch/arm/include/asm/mm.h b/xen/arch/arm/include/asm/mm.h
index 68adcac9fa8d..2366928d71aa 100644
--- a/xen/arch/arm/include/asm/mm.h
+++ b/xen/arch/arm/include/asm/mm.h
@@ -406,6 +406,11 @@ static inline void page_set_xenheap_gfn(struct page_info
*p, gfn_t gfn)
} while ( (y = cmpxchg(&p->u.inuse.type_info, x, nx)) != x );
}
+static inline bool arch_has_directmap(void)
+{
+ return true;
Shoudn't arch_has_directmap return false for arm32?
We still have a directmap on Arm32, but it only covers the xenheap.
Cheers,
--
Julien Grall
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