linuxppc-dev.lists.ozlabs.org archive mirror
 help / color / mirror / Atom feed
From: Andrew Donnellan <ajd@linux.ibm.com>
To: linuxppc-dev@lists.ozlabs.org, linux-integrity@vger.kernel.org
Cc: sudhakar@linux.ibm.com, bgray@linux.ibm.com,
	erichte@linux.ibm.com, gregkh@linuxfoundation.org,
	nayna@linux.ibm.com, linux-kernel@vger.kernel.org,
	zohar@linux.ibm.com, gjoyce@linux.ibm.com, ruscur@russell.cc,
	gcwilson@linux.ibm.com, joel@jms.id.au
Subject: [PATCH v4 20/24] powerpc/pseries: Add helpers to get PLPKS password
Date: Fri, 20 Jan 2023 18:43:02 +1100	[thread overview]
Message-ID: <20230120074306.1326298-21-ajd@linux.ibm.com> (raw)
In-Reply-To: <20230120074306.1326298-1-ajd@linux.ibm.com>

From: Russell Currey <ruscur@russell.cc>

Add helper functions to get the PLPKS password. This will be used in a
later patch to support passing the password between kernels over kexec.

Signed-off-by: Russell Currey <ruscur@russell.cc>
Signed-off-by: Andrew Donnellan <ajd@linux.ibm.com>

---

v3: New patch
---
 arch/powerpc/include/asm/plpks.h       | 11 +++++++++++
 arch/powerpc/platforms/pseries/plpks.c | 10 ++++++++++
 2 files changed, 21 insertions(+)

diff --git a/arch/powerpc/include/asm/plpks.h b/arch/powerpc/include/asm/plpks.h
index 0c49969b0864..08355c89f5fd 100644
--- a/arch/powerpc/include/asm/plpks.h
+++ b/arch/powerpc/include/asm/plpks.h
@@ -171,6 +171,17 @@ u32 plpks_get_maxlargeobjectsize(void);
  */
 u64 plpks_get_signedupdatealgorithms(void);
 
+/**
+ * Returns the PLPKS password generated by the hypervisor.
+ * Should only be used to prepare a different OS to use the PLPKS, i.e. kexec.
+ */
+u8 *plpks_get_password(void);
+
+/**
+ * Returns the length of the PLPKS password in bytes.
+ */
+u16 plpks_get_passwordlen(void);
+
 #endif // CONFIG_PSERIES_PLPKS
 
 #endif // _ASM_POWERPC_PLPKS_H
diff --git a/arch/powerpc/platforms/pseries/plpks.c b/arch/powerpc/platforms/pseries/plpks.c
index 5d9c6a3b2014..b3c7410a4f13 100644
--- a/arch/powerpc/platforms/pseries/plpks.c
+++ b/arch/powerpc/platforms/pseries/plpks.c
@@ -359,6 +359,16 @@ u64 plpks_get_signedupdatealgorithms(void)
 	return signedupdatealgorithms;
 }
 
+u8 *plpks_get_password(void)
+{
+	return ospassword;
+}
+
+u16 plpks_get_passwordlen(void)
+{
+	return ospasswordlength;
+}
+
 bool plpks_is_available(void)
 {
 	int rc;
-- 
2.39.0


  parent reply	other threads:[~2023-01-20  7:55 UTC|newest]

Thread overview: 52+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-01-20  7:42 [PATCH v4 00/24] pSeries dynamic secure boot secvar interface + platform keyring loading Andrew Donnellan
2023-01-20  7:42 ` [PATCH v4 01/24] powerpc/pseries: Fix handling of PLPKS object flushing timeout Andrew Donnellan
2023-01-20  7:42 ` [PATCH v4 02/24] powerpc/pseries: Fix alignment of PLPKS structures and buffers Andrew Donnellan
2023-01-25 13:09   ` Michael Ellerman
2023-01-26 17:19     ` Segher Boessenkool
2023-01-26 17:31       ` David Laight
2023-01-27  3:20         ` Andrew Donnellan
2023-01-27  9:05           ` David Laight
2023-01-27 11:08           ` Michael Ellerman
2023-01-27 10:52       ` Michael Ellerman
2023-01-20  7:42 ` [PATCH v4 03/24] powerpc/secvar: Use u64 in secvar_operations Andrew Donnellan
2023-01-20  7:42 ` [PATCH v4 04/24] powerpc/secvar: Warn and error if multiple secvar ops are set Andrew Donnellan
2023-01-20  7:42 ` [PATCH v4 05/24] powerpc/secvar: Use sysfs_emit() instead of sprintf() Andrew Donnellan
2023-01-20  7:42 ` [PATCH v4 06/24] powerpc/secvar: Handle format string in the consumer Andrew Donnellan
2023-01-20  7:42 ` [PATCH v4 07/24] powerpc/secvar: Handle max object size " Andrew Donnellan
2023-01-20  7:42 ` [PATCH v4 08/24] powerpc/secvar: Clean up init error messages Andrew Donnellan
2023-01-20  7:42 ` [PATCH v4 09/24] powerpc/secvar: Extend sysfs to include config vars Andrew Donnellan
2023-01-20  7:42 ` [PATCH v4 10/24] powerpc/secvar: Allow backend to populate static list of variable names Andrew Donnellan
2023-01-20  7:42 ` [PATCH v4 11/24] powerpc/secvar: Warn when PAGE_SIZE is smaller than max object size Andrew Donnellan
2023-01-20  7:42 ` [PATCH v4 12/24] powerpc/secvar: Don't print error on ENOENT when reading variables Andrew Donnellan
2023-01-20  7:42 ` [PATCH v4 13/24] powerpc/pseries: Move plpks.h to include directory Andrew Donnellan
2023-01-20  7:42 ` [PATCH v4 14/24] powerpc/pseries: Move PLPKS constants to header file Andrew Donnellan
2023-01-20  7:42 ` [PATCH v4 15/24] powerpc/pseries: Expose PLPKS config values, support additional fields Andrew Donnellan
2023-01-20  7:42 ` [PATCH v4 16/24] powerpc/pseries: Implement signed update for PLPKS objects Andrew Donnellan
2023-01-24  4:16   ` Nicholas Piggin
2023-01-30  4:43     ` Andrew Donnellan
2023-01-31  4:23       ` Russell Currey
2023-01-20  7:42 ` [PATCH v4 17/24] powerpc/pseries: Log hcall return codes for PLPKS debug Andrew Donnellan
2023-01-20  7:43 ` [PATCH v4 18/24] powerpc/pseries: Make caller pass buffer to plpks_read_var() Andrew Donnellan
2023-01-20  7:43 ` [PATCH v4 19/24] powerpc/pseries: Turn PSERIES_PLPKS into a hidden option Andrew Donnellan
2023-01-24  4:26   ` Nicholas Piggin
2023-01-20  7:43 ` Andrew Donnellan [this message]
2023-01-20  7:43 ` [PATCH v4 21/24] powerpc/pseries: Pass PLPKS password on kexec Andrew Donnellan
2023-01-24  4:36   ` Nicholas Piggin
2023-01-24  4:40     ` Andrew Donnellan
2023-01-25  3:59       ` Michael Ellerman
2023-01-31  2:43     ` Russell Currey
2023-01-20  7:43 ` [PATCH v4 22/24] powerpc/pseries: Implement secvars for dynamic secure boot Andrew Donnellan
2023-01-24  5:17   ` Nicholas Piggin
2023-01-31  2:54     ` Andrew Donnellan
2023-01-31  4:25       ` Andrew Donnellan
2023-01-31  8:55       ` Nicholas Piggin
2023-02-01  2:15         ` Andrew Donnellan
2023-01-20  7:43 ` [PATCH v4 23/24] integrity/powerpc: Improve error handling & reporting when loading certs Andrew Donnellan
2023-01-24 15:42   ` Mimi Zohar
2023-01-20  7:43 ` [PATCH v4 24/24] integrity/powerpc: Support loading keys from pseries secvar Andrew Donnellan
2023-01-24  5:24   ` Nicholas Piggin
2023-01-24 15:14   ` Mimi Zohar
2023-01-25  0:45     ` Andrew Donnellan
2023-01-25  2:23     ` Russell Currey
2023-01-25  2:47       ` Mimi Zohar
2023-01-31  1:03         ` Andrew Donnellan

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20230120074306.1326298-21-ajd@linux.ibm.com \
    --to=ajd@linux.ibm.com \
    --cc=bgray@linux.ibm.com \
    --cc=erichte@linux.ibm.com \
    --cc=gcwilson@linux.ibm.com \
    --cc=gjoyce@linux.ibm.com \
    --cc=gregkh@linuxfoundation.org \
    --cc=joel@jms.id.au \
    --cc=linux-integrity@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linuxppc-dev@lists.ozlabs.org \
    --cc=nayna@linux.ibm.com \
    --cc=ruscur@russell.cc \
    --cc=sudhakar@linux.ibm.com \
    --cc=zohar@linux.ibm.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).