From: Dave Hansen <dave.hansen@intel.com>
To: Rick Edgecombe <rick.p.edgecombe@intel.com>,
bp@alien8.de, hpa@zytor.com, kas@kernel.org, kvm@vger.kernel.org,
linux-coco@lists.linux.dev, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org, mingo@redhat.com,
nik.borisov@suse.com, pbonzini@redhat.com, seanjc@google.com,
tglx@kernel.org, vannapurve@google.com, x86@kernel.org,
chao.gao@intel.com, yan.y.zhao@intel.com, kai.huang@intel.com,
tony.lindgren@linux.intel.com, binbin.wu@intel.com,
sohil.mehta@intel.com
Cc: Hongyu Ning <hongyu.ning@linux.intel.com>,
Binbin Wu <binbin.wu@linux.intel.com>
Subject: Re: [PATCH v10 10/11] Documentation/x86: Add documentation for TDX's Dynamic PAMT
Date: Thu, 3 Sep 2026 08:47:48 -0700 [thread overview]
Message-ID: <225572f8-5636-41fd-9315-ef5efb78f0a5@intel.com> (raw)
In-Reply-To: <20260903015113.93343-11-rick.p.edgecombe@intel.com>
On 9/2/26 18:51, Rick Edgecombe wrote:
> +Dynamic PAMT is only enabled when supported and the ``tdx_dpamt=`` kernel
> +parameter is set to "on". The feature is off by default because TDX module
> +internal details prevent Dynamic PAMT from working on all keyid partitioning
> +configurations. When the TDX module is fixed to include these constraints in
> +its enumeration of Dynamic PAMT support, kernel support can be changed to
> +default on. For more information, consult the Intel TDX documentation about
> +Dynamic PAMT.
What's the end user visible effect of hitting one of these troublesome
"keyid partitioning configurations"?
next prev parent reply other threads:[~2026-09-03 15:47 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-03 1:51 [PATCH v10 00/11] Dynamic PAMT Rick Edgecombe
2026-09-03 1:51 ` [PATCH v10 01/11] x86/virt/tdx: Simplify PAMT layout calculation Rick Edgecombe
2026-09-03 1:51 ` [PATCH v10 02/11] x86/virt/tdx: Allocate page bitmap for Dynamic PAMT Rick Edgecombe
2026-09-03 1:51 ` [PATCH v10 03/11] x86/virt/tdx: Add __tdx_pamt_get/put() helpers Rick Edgecombe
2026-09-03 15:28 ` Dave Hansen
2026-09-03 1:51 ` [PATCH v10 04/11] x86/virt/tdx: Allocate refcounts for Dynamic PAMT memory Rick Edgecombe
2026-09-03 15:30 ` Dave Hansen
2026-09-03 18:33 ` Edgecombe, Rick P
2026-09-03 1:51 ` [PATCH v10 05/11] x86/virt/tdx: Handle multiple callers in tdx_pamt_get/put() Rick Edgecombe
[not found] ` <20260903020303.349961F000E9@smtp.kernel.org>
2026-09-03 23:16 ` Edgecombe, Rick P
2026-09-03 1:51 ` [PATCH v10 06/11] KVM: TDX: Allocate PAMT memory for TD and vCPU control structures Rick Edgecombe
2026-09-03 1:51 ` [PATCH v10 07/11] x86/virt/tdx: Add APIs to support Dynamic PAMT ops from KVM's fault path Rick Edgecombe
2026-09-03 1:51 ` [PATCH v10 08/11] KVM: TDX: Get/put PAMT pages when (un)mapping private memory Rick Edgecombe
2026-09-03 1:51 ` [PATCH v10 09/11] x86/virt/tdx: Enable Dynamic PAMT Rick Edgecombe
2026-09-03 15:38 ` Dave Hansen
2026-09-03 1:51 ` [PATCH v10 10/11] Documentation/x86: Add documentation for TDX's " Rick Edgecombe
2026-09-03 15:47 ` Dave Hansen [this message]
2026-09-03 19:31 ` Edgecombe, Rick P
2026-09-03 19:36 ` Dave Hansen
2026-09-03 20:39 ` Edgecombe, Rick P
2026-09-03 20:45 ` Dave Hansen
2026-09-03 1:51 ` [PATCH v10 11/11] x86/virt/tdx: Optimize tdx_pamt_get/put() Rick Edgecombe
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