From: James Bottomley <James.Bottomley@HansenPartnership.com>
To: Ross Philipson <ross.philipson@oracle.com>,
linux-kernel@vger.kernel.org, x86@kernel.org,
linux-integrity@vger.kernel.org, linux-doc@vger.kernel.org,
linux-crypto@vger.kernel.org, kexec@lists.infradead.org,
linux-efi@vger.kernel.org, iommu@lists.linux-foundation.org
Cc: dpsmith@apertussolutions.com, tglx@linutronix.de,
mingo@redhat.com, bp@alien8.de, hpa@zytor.com,
dave.hansen@linux.intel.com, ardb@kernel.org,
mjg59@srcf.ucam.org, peterhuewe@gmx.de, jarkko@kernel.org,
jgg@ziepe.ca, luto@amacapital.net, nivedita@alum.mit.edu,
herbert@gondor.apana.org.au, davem@davemloft.net,
corbet@lwn.net, ebiederm@xmission.com, dwmw2@infradead.org,
baolu.lu@linux.intel.com, kanth.ghatraju@oracle.com,
andrew.cooper3@citrix.com, trenchboot-devel@googlegroups.com
Subject: Re: [PATCH v11 18/20] tpm: Add sysfs interface to allow setting and querying the default locality
Date: Fri, 01 Nov 2024 12:17:24 +0900 [thread overview]
Message-ID: <685f3f00ddf88e961e2d861b7c783010774fe19d.camel@HansenPartnership.com> (raw)
In-Reply-To: <20240913200517.3085794-19-ross.philipson@oracle.com>
On Fri, 2024-09-13 at 13:05 -0700, Ross Philipson wrote:
> Expose a sysfs interface to allow user mode to set and query the
> default locality set for the TPM chip.
What does a user need this for? It somewhat conflicts with the idea of
running the kernel and user space TPM access in separate localities for
the purposes of key release, so we can seal keys to only release in the
kernel by policy. When I last talked about this I thought we'd
probably use 0 for user and, say 2, for the kernel (mainly because
prior incarnations of this patch set seemed to access the TPM in
locality 2 from the kernel). It really doesn't matter *what* locality
we use for the kernel and the user as long as it's known ahead of time
and the user can't gain access to the kernel locality.
Regards,
James
next prev parent reply other threads:[~2024-11-01 3:17 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-09-13 20:04 [PATCH v11 00/20] x86: Trenchboot secure dynamic launch Linux kernel support Ross Philipson
2024-09-13 20:04 ` [PATCH v11 01/20] Documentation/x86: Secure Launch kernel documentation Ross Philipson
2024-11-01 19:31 ` Elliott, Robert (Servers)
2024-09-13 20:04 ` [PATCH v11 02/20] x86: Secure Launch Kconfig Ross Philipson
2024-09-13 20:05 ` [PATCH v11 03/20] x86: Secure Launch Resource Table header file Ross Philipson
2024-09-13 20:05 ` [PATCH v11 04/20] x86: Secure Launch main " Ross Philipson
2024-09-13 20:05 ` [PATCH v11 05/20] x86: Add early SHA-1 support for Secure Launch early measurements Ross Philipson
2024-09-13 20:05 ` [PATCH v11 06/20] x86: Add early SHA-256 " Ross Philipson
2024-09-13 20:05 ` [PATCH v11 07/20] x86/msr: Add variable MTRR base/mask and x2apic ID registers Ross Philipson
2024-09-13 20:05 ` [PATCH v11 08/20] x86/boot: Place TXT MLE header in the kernel_info section Ross Philipson
2024-09-13 20:05 ` [PATCH v11 09/20] x86: Secure Launch kernel early boot stub Ross Philipson
2024-09-13 20:05 ` [PATCH v11 10/20] x86: Secure Launch kernel late " Ross Philipson
2024-09-13 20:05 ` [PATCH v11 11/20] x86: Secure Launch SMP bringup support Ross Philipson
2024-09-13 20:05 ` [PATCH v11 12/20] kexec: Secure Launch kexec SEXIT support Ross Philipson
2024-09-13 20:05 ` [PATCH v11 13/20] x86/reboot: Secure Launch SEXIT support on reboot paths Ross Philipson
2024-09-13 20:05 ` [PATCH v11 14/20] tpm: Protect against locality counter underflow Ross Philipson
2024-11-01 9:33 ` Jarkko Sakkinen
2024-09-13 20:05 ` [PATCH v11 15/20] tpm: Ensure tpm is in known state at startup Ross Philipson
2024-11-01 9:37 ` Jarkko Sakkinen
2024-11-02 14:02 ` Jarkko Sakkinen
2024-09-13 20:05 ` [PATCH v11 16/20] tpm: Make locality requests return consistent values Ross Philipson
2024-11-01 10:04 ` Jarkko Sakkinen
2024-11-02 14:26 ` Jarkko Sakkinen
2024-09-13 20:05 ` [PATCH v11 17/20] tpm: Add ability to set the default locality the TPM chip uses Ross Philipson
2024-11-01 10:05 ` Jarkko Sakkinen
2024-11-02 1:37 ` [RFC PATCH] tpm, tpm_tis: Introduce TPM_IOC_SET_LOCALITY Jarkko Sakkinen
2024-11-02 1:39 ` Jarkko Sakkinen
2024-11-02 6:22 ` [RFC PATCH v2 1/2] " Jarkko Sakkinen
2024-11-02 6:22 ` [RFC PATCH v2 2/2] tpm: show the default locality in sysfs Jarkko Sakkinen
2024-11-02 6:29 ` [RFC PATCH v2 1/2] tpm, tpm_tis: Introduce TPM_IOC_SET_LOCALITY Jarkko Sakkinen
2024-11-02 9:02 ` Ard Biesheuvel
2024-11-02 10:38 ` Jarkko Sakkinen
2024-11-02 10:40 ` Jarkko Sakkinen
2024-11-02 10:52 ` Ard Biesheuvel
2024-11-02 13:39 ` Jarkko Sakkinen
2024-11-02 14:07 ` Jarkko Sakkinen
2024-09-13 20:05 ` [PATCH v11 18/20] tpm: Add sysfs interface to allow setting and querying the default locality Ross Philipson
2024-11-01 3:17 ` James Bottomley [this message]
2024-11-01 10:06 ` Jarkko Sakkinen
2024-11-01 21:50 ` Jarkko Sakkinen
2024-11-01 21:56 ` Jarkko Sakkinen
2024-09-13 20:05 ` [PATCH v11 19/20] x86: Secure Launch late initcall platform module Ross Philipson
2024-09-13 20:05 ` [PATCH v11 20/20] x86/efi: EFI stub DRTM launch support for Secure Launch Ross Philipson
2024-10-31 19:25 ` [PATCH v11 00/20] x86: Trenchboot secure dynamic launch Linux kernel support Thomas Gleixner
2024-10-31 22:37 ` Jarkko Sakkinen
2024-10-31 23:08 ` Thomas Gleixner
2024-11-01 0:33 ` Jarkko Sakkinen
2024-11-01 0:40 ` Jarkko Sakkinen
2024-11-01 8:50 ` Ard Biesheuvel
2024-11-01 9:18 ` Jarkko Sakkinen
2024-11-01 9:30 ` Jarkko Sakkinen
2024-11-01 14:51 ` Jarkko Sakkinen
2024-11-01 10:28 ` Jarkko Sakkinen
2024-11-01 20:34 ` Thomas Gleixner
2024-11-01 21:13 ` Jarkko Sakkinen
2024-11-01 21:19 ` Jarkko Sakkinen
2024-11-01 22:04 ` Thomas Gleixner
2024-11-01 22:18 ` Jarkko Sakkinen
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