From: Alison Schofield <alison.schofield@intel.com>
To: Li Ming <ming.li@zohomail.com>
Cc: <dave@stgolabs.net>, <jonathan.cameron@huawei.com>,
<dave.jiang@intel.com>, <vishal.l.verma@intel.com>,
<ira.weiny@intel.com>, <dan.j.williams@intel.com>,
<shiju.jose@huawei.com>, <linux-cxl@vger.kernel.org>,
<linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 2/2] cxl/core: Add a helper function to check dpa availability
Date: Sun, 29 Jun 2025 18:41:29 -0700 [thread overview]
Message-ID: <aGHrSVX7ce96nTmt@aschofie-mobl2.lan> (raw)
In-Reply-To: <20250629082042.256123-2-ming.li@zohomail.com>
On Sun, Jun 29, 2025 at 04:20:42PM +0800, Li Ming wrote:
> In CXL subsystem, many pieces of code that need to check dpa
> availability in case using wrong dpa. Add a helper function called
> is_valid_dpa() for dpa availability checking.
Does this have anything DPA special about it. Could it be done in
in a new helper like resource_contains_addr() for all to employ.
In CXL, we'd use it in at least one more place, checking for HPA
in a region resource.
-- Alison
>
snip
> +bool is_valid_dpa(struct resource *res, u64 dpa)
> +{
> + return (dpa >= res->start && dpa <= res->end);
> +}
> +
snip
>
next prev parent reply other threads:[~2025-06-30 1:41 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-06-29 8:20 [PATCH 1/2] cxl/edac: Fix wrong dpa checking for PPR operation Li Ming
2025-06-29 8:20 ` [PATCH 2/2] cxl/core: Add a helper function to check dpa availability Li Ming
2025-06-30 1:41 ` Alison Schofield [this message]
2025-06-30 4:56 ` Li Ming
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