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RE: [Xen-devel] [PATCH] [x86_64] Fixing PGT_va_mutable and PGT_va_unknow
| To: | "Keir Fraser" <Keir.Fraser@xxxxxxxxxxxx> |
|---|---|
| Subject: | RE: [Xen-devel] [PATCH] [x86_64] Fixing PGT_va_mutable and PGT_va_unknown |
| From: | "Nakajima, Jun" <jun.nakajima@xxxxxxxxx> |
| Date: | Mon, 15 Aug 2005 01:06:31 -0700 |
| Cc: | xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx> |
| Delivery-date: | Mon, 15 Aug 2005 08:04:54 +0000 |
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| Thread-index: | AcWhbo21tppUoZgYRBKZfHp0PmlgnQAAY7Fw |
| Thread-topic: | [Xen-devel] [PATCH] [x86_64] Fixing PGT_va_mutable and PGT_va_unknown |
Keir Fraser wrote: > On 15 Aug 2005, at 08:50, Nakajima, Jun wrote: > >>> Okay, but I see no reason to change PGT_va_mask. You already include >>> 28 bits where you actually need only 27 bits of backptr. >> >> The current one >> #define PGT_va_mask ((unsigned >> long)((1U<<28)-1)<<PGT_va_shift) includes only 27 bits (see -1). > > (1<<n)-1 sets the n least significant bits, not n-1. You are right. I need to go to bed now. > > -- Keir Jun --- Intel Open Source Technology Center _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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