From: Mimi Zohar <zohar@linux.ibm.com>
To: steven chen <chenste@linux.microsoft.com>,
stefanb@linux.ibm.com, roberto.sassu@huaweicloud.com,
roberto.sassu@huawei.com, eric.snowberg@oracle.com,
ebiederm@xmission.com, paul@paul-moore.com, code@tyhicks.com,
bauermann@kolabnow.com, linux-integrity@vger.kernel.org,
kexec@lists.infradead.org, linux-security-module@vger.kernel.org,
linux-kernel@vger.kernel.org
Cc: madvenka@linux.microsoft.com, nramas@linux.microsoft.com,
James.Bottomley@HansenPartnership.com, bhe@redhat.com,
vgoyal@redhat.com, dyoung@redhat.com
Subject: Re: [PATCH v8 6/7] ima: make the kexec extra memory configurable
Date: Thu, 20 Feb 2025 16:36:18 -0500 [thread overview]
Message-ID: <44a2c7cb424c769c6c8863324c522533cb70b0a5.camel@linux.ibm.com> (raw)
In-Reply-To: <20250218225502.747963-7-chenste@linux.microsoft.com>
On Tue, 2025-02-18 at 14:55 -0800, steven chen wrote:
> The extra memory allocated for carrying the IMA measurement list across
> kexec is hard-coded as half a PAGE. Make it configurable.
>
> Define a Kconfig option, IMA_KEXEC_EXTRA_MEMORY_KB, to configure the
> extra memory (in kb) to be allocated for IMA measurements added during
> kexec soft reboot. Ensure the default value of the option is set such
> that extra half a page of memory for additional measurements is allocated
> for the additional measurements.
>
> Update ima_add_kexec_buffer() function to allocate memory based on the
> Kconfig option value, rather than the currently hard-coded one.
>
> Suggested-by: Stefan Berger <stefanb@linux.ibm.com>
> Signed-off-by: Tushar Sugandhi <tusharsu@linux.microsoft.com>
> Signed-off-by: steven chen <chenste@linux.microsoft.com>
> Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
Reviewed-by: Mimi Zohar <zohar@linux.ibm.com>
next prev parent reply other threads:[~2025-02-20 21:38 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-18 22:54 [PATCH v8 0/7] ima: kexec: measure events between kexec load and execute steven chen
2025-02-18 22:54 ` [PATCH v8 1/7] ima: define and call ima_alloc_kexec_file_buf steven chen
2025-02-20 14:53 ` Mimi Zohar
2025-02-20 15:04 ` James Bottomley
2025-02-20 16:23 ` Mimi Zohar
2025-02-21 21:02 ` steven chen
2025-02-18 22:54 ` [PATCH v8 2/7] kexec: define functions to map and unmap segments steven chen
2025-02-20 0:53 ` kernel test robot
2025-02-20 17:22 ` Mimi Zohar
2025-02-21 21:05 ` steven chen
2025-02-24 6:14 ` Baoquan He
2025-02-24 23:05 ` steven chen
2025-02-25 0:18 ` Baoquan He
2025-02-25 18:35 ` steven chen
2025-02-26 0:39 ` Baoquan He
2025-02-27 15:41 ` Mimi Zohar
2025-02-28 5:03 ` Baoquan He
2025-03-04 16:15 ` Mimi Zohar
2025-02-18 22:54 ` [PATCH v8 3/7] ima: kexec: skip IMA segment validation after kexec soft reboot steven chen
2025-02-21 15:41 ` Mimi Zohar
2025-02-21 21:06 ` steven chen
2025-02-18 22:54 ` [PATCH v8 4/7] ima: kexec: define functions to copy IMA log at soft boot steven chen
2025-02-19 15:37 ` Stefan Berger
2025-02-19 19:21 ` steven chen
2025-02-21 19:07 ` Mimi Zohar
2025-02-21 19:41 ` Stefan Berger
2025-02-18 22:55 ` [PATCH v8 5/7] ima: kexec: move IMA log copy from kexec load to execute steven chen
2025-02-19 15:57 ` Stefan Berger
2025-02-19 19:23 ` steven chen
2025-02-20 1:35 ` kernel test robot
2025-02-18 22:55 ` [PATCH v8 6/7] ima: make the kexec extra memory configurable steven chen
2025-02-20 21:36 ` Mimi Zohar [this message]
2025-02-18 22:55 ` [PATCH v8 7/7] ima: measure kexec load and exec events as critical data steven chen
2025-02-19 16:23 ` Stefan Berger
2025-02-19 19:24 ` steven chen
2025-02-21 0:46 ` Mimi Zohar
2025-02-21 21:10 ` steven chen
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