From: Hans de Goede <hdegoede@redhat.com>
To: Jithu Joseph <jithu.joseph@intel.com>, markgross@kernel.org
Cc: tglx@linutronix.de, mingo@redhat.com, bp@alien8.de,
dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com,
gregkh@linuxfoundation.org, ashok.raj@intel.com,
tony.luck@intel.com, linux-kernel@vger.kernel.org,
platform-driver-x86@vger.kernel.org, patches@lists.linux.dev,
ravi.v.shankar@intel.com, thiago.macieira@intel.com,
athenas.jimenez.gonzalez@intel.com, sohil.mehta@intel.com
Subject: Re: [PATCH v3 04/16] platform/x86/intel/ifs: Remove memory allocation from load path
Date: Thu, 17 Nov 2022 09:51:30 +0100 [thread overview]
Message-ID: <77e9d0f2-12d9-fc7a-2161-c579b7bbd673@redhat.com> (raw)
In-Reply-To: <20221117035935.4136738-5-jithu.joseph@intel.com>
Hi,
On 11/17/22 04:59, Jithu Joseph wrote:
> IFS requires tests to be authenticated once for each CPU socket
> on a system.
>
> scan_chunks_sanity_check() was dynamically allocating memory
> to store the state of whether tests have been authenticated on
> each socket for every load operation.
>
> Move the memory allocation to init path.
>
> Reviewed-by: Tony Luck <tony.luck@intel.com>
> Suggested-by: Borislav Petkov <bp@alien8.de>
> Signed-off-by: Jithu Joseph <jithu.joseph@intel.com>
> ---
> drivers/platform/x86/intel/ifs/ifs.h | 2 ++
> drivers/platform/x86/intel/ifs/core.c | 13 +++++++++++--
> drivers/platform/x86/intel/ifs/load.c | 14 ++++----------
> 3 files changed, 17 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/platform/x86/intel/ifs/ifs.h b/drivers/platform/x86/intel/ifs/ifs.h
> index 3ff1d9aaeaa9..3a051890d9e7 100644
> --- a/drivers/platform/x86/intel/ifs/ifs.h
> +++ b/drivers/platform/x86/intel/ifs/ifs.h
> @@ -229,4 +229,6 @@ void ifs_load_firmware(struct device *dev);
> int do_core_test(int cpu, struct device *dev);
> const struct attribute_group **ifs_get_groups(void);
>
> +extern bool *ifs_pkg_auth;
> +
This is not necessary and ugly, nack for this patch as-is (sorry).
You can simply add this pointer to "struct ifs_data" and then
alloc it in ifs_init() before the misc_register call.
scan_chunks_sanity_check() already has a "struct ifs_data *ifsd",
so it can easily access ifs_pkg_auth through that when you make
ifs_pkg_auth part of "struct ifs_data".
Regards,
Hans
\
> #endif
> diff --git a/drivers/platform/x86/intel/ifs/core.c b/drivers/platform/x86/intel/ifs/core.c
> index 5fb7f655c291..4b39f2359180 100644
> --- a/drivers/platform/x86/intel/ifs/core.c
> +++ b/drivers/platform/x86/intel/ifs/core.c
> @@ -4,6 +4,7 @@
> #include <linux/module.h>
> #include <linux/kdev_t.h>
> #include <linux/semaphore.h>
> +#include <linux/slab.h>
>
> #include <asm/cpu_device_id.h>
>
> @@ -30,6 +31,8 @@ static struct ifs_device ifs_device = {
> },
> };
>
> +bool *ifs_pkg_auth;
> +
> static int __init ifs_init(void)
> {
> const struct x86_cpu_id *m;
> @@ -51,8 +54,13 @@ static int __init ifs_init(void)
> ifs_device.misc.groups = ifs_get_groups();
>
> if ((msrval & BIT(ifs_device.data.integrity_cap_bit)) &&
> - !misc_register(&ifs_device.misc))
> - return 0;
> + !misc_register(&ifs_device.misc)) {
> + ifs_pkg_auth = kmalloc_array(topology_max_packages(), sizeof(bool), GFP_KERNEL);
> + if (!ifs_pkg_auth)
> + return -ENOMEM;
> + else
> + return 0;
> + }
>
> return -ENODEV;
> }
> @@ -60,6 +68,7 @@ static int __init ifs_init(void)
> static void __exit ifs_exit(void)
> {
> misc_deregister(&ifs_device.misc);
> + kfree(ifs_pkg_auth);
> }
>
> module_init(ifs_init);
> diff --git a/drivers/platform/x86/intel/ifs/load.c b/drivers/platform/x86/intel/ifs/load.c
> index 89ce265887ea..c914e4d359db 100644
> --- a/drivers/platform/x86/intel/ifs/load.c
> +++ b/drivers/platform/x86/intel/ifs/load.c
> @@ -3,7 +3,6 @@
>
> #include <linux/firmware.h>
> #include <asm/cpu.h>
> -#include <linux/slab.h>
> #include <asm/microcode_intel.h>
>
> #include "ifs.h"
> @@ -118,16 +117,12 @@ static void copy_hashes_authenticate_chunks(struct work_struct *work)
> */
> static int scan_chunks_sanity_check(struct device *dev)
> {
> - int metadata_size, curr_pkg, cpu, ret = -ENOMEM;
> + int metadata_size, curr_pkg, cpu, ret;
> struct ifs_data *ifsd = ifs_get_data(dev);
> - bool *package_authenticated;
> struct ifs_work local_work;
> char *test_ptr;
>
> - package_authenticated = kcalloc(topology_max_packages(), sizeof(bool), GFP_KERNEL);
> - if (!package_authenticated)
> - return ret;
> -
> + memset(ifs_pkg_auth, 0, (topology_max_packages() * sizeof(bool)));
> metadata_size = ifs_header_ptr->metadata_size;
>
> /* Spec says that if the Meta Data Size = 0 then it should be treated as 2000 */
> @@ -150,7 +145,7 @@ static int scan_chunks_sanity_check(struct device *dev)
> cpus_read_lock();
> for_each_online_cpu(cpu) {
> curr_pkg = topology_physical_package_id(cpu);
> - if (package_authenticated[curr_pkg])
> + if (ifs_pkg_auth[curr_pkg])
> continue;
> reinit_completion(&ifs_done);
> local_work.dev = dev;
> @@ -161,12 +156,11 @@ static int scan_chunks_sanity_check(struct device *dev)
> ret = -EIO;
> goto out;
> }
> - package_authenticated[curr_pkg] = 1;
> + ifs_pkg_auth[curr_pkg] = 1;
> }
> ret = 0;
> out:
> cpus_read_unlock();
> - kfree(package_authenticated);
>
> return ret;
> }
next prev parent reply other threads:[~2022-11-17 8:52 UTC|newest]
Thread overview: 193+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-21 20:33 [PATCH 00/14] IFS multi test image support and misc changes Jithu Joseph
2022-10-21 20:34 ` [PATCH 01/14] platform/x86/intel/ifs: Remove unused selection Jithu Joseph
2022-10-21 20:34 ` [PATCH 02/14] platform/x86/intel/ifs: Propagate load failure error code Jithu Joseph
2022-10-24 22:52 ` Sohil Mehta
2022-10-24 23:17 ` Joseph, Jithu
2022-10-21 20:34 ` [PATCH 03/14] platform/x86/intel/ifs: return a more appropriate Error code Jithu Joseph
2022-10-24 22:57 ` Sohil Mehta
2022-10-24 23:01 ` Luck, Tony
2022-10-21 20:34 ` [PATCH 04/14] platform/x86/intel/ifs: Remove image loading during init Jithu Joseph
2022-10-24 23:50 ` Sohil Mehta
2022-10-25 0:41 ` Joseph, Jithu
2022-10-25 6:06 ` Sohil Mehta
2022-10-26 23:53 ` Joseph, Jithu
2022-11-01 7:00 ` Sohil Mehta
2022-10-21 20:34 ` [PATCH 05/14] x86/microcode/intel: Expose find_matching_signature() for IFS Jithu Joseph
2022-11-02 19:03 ` Borislav Petkov
2022-11-02 21:32 ` Joseph, Jithu
2022-10-21 20:34 ` [PATCH 06/14] x86/microcode/intel: Use appropriate type in microcode_sanity_check() Jithu Joseph
2022-10-21 20:34 ` [PATCH 07/14] x86/microcode/intel: Expose microcode_sanity_check() Jithu Joseph
2022-11-01 7:28 ` Sohil Mehta
2022-11-01 19:06 ` Joseph, Jithu
2022-11-03 11:33 ` Borislav Petkov
2022-11-03 19:25 ` Ashok Raj
2022-11-03 23:32 ` Borislav Petkov
2022-11-04 6:15 ` Joseph, Jithu
2022-11-04 10:50 ` Borislav Petkov
2022-11-04 22:02 ` Joseph, Jithu
2022-11-04 22:14 ` Borislav Petkov
2022-10-21 20:34 ` [PATCH 08/14] x86/microcode/intel: Meta-data support in microcode file Jithu Joseph
2022-11-01 8:51 ` Sohil Mehta
2022-11-01 18:05 ` Joseph, Jithu
2022-11-03 11:35 ` Borislav Petkov
2022-10-21 20:34 ` [PATCH 09/14] platform/x86/intel/ifs: Use generic microcode headers and functions Jithu Joseph
2022-11-01 18:37 ` Sohil Mehta
2022-11-01 21:07 ` Joseph, Jithu
2022-10-21 20:34 ` [PATCH 10/14] platform/x86/intel/ifs: Add metadata validation Jithu Joseph
2022-11-01 20:28 ` Sohil Mehta
2022-11-09 23:10 ` Sohil Mehta
2022-10-21 20:34 ` [PATCH 11/14] platform/x86/intel/ifs: Remove reload sysfs entry Jithu Joseph
2022-10-21 20:34 ` [PATCH 12/14] platform/x86/intel/ifs: Add current_batch " Jithu Joseph
2022-11-01 22:26 ` Sohil Mehta
2022-11-01 23:27 ` Joseph, Jithu
2022-11-03 8:03 ` Sohil Mehta
2022-10-21 20:34 ` [PATCH 13/14] Documentation/ABI: Update IFS ABI doc Jithu Joseph
2022-11-01 22:34 ` Sohil Mehta
2022-11-01 22:48 ` Joseph, Jithu
2022-11-01 22:59 ` Sohil Mehta
2022-11-02 22:10 ` Joseph, Jithu
2022-11-03 7:49 ` Sohil Mehta
2022-10-21 20:34 ` [PATCH 14/14] Revert "platform/x86/intel/ifs: Mark as BROKEN" Jithu Joseph
2022-11-03 8:21 ` [PATCH 00/14] IFS multi test image support and misc changes Sohil Mehta
2022-11-07 9:24 ` Hans de Goede
2022-11-07 23:01 ` Joseph, Jithu
2022-11-07 22:53 ` [PATCH v2 " Jithu Joseph
2022-11-07 22:53 ` [PATCH v2 01/14] platform/x86/intel/ifs: Remove unused selection Jithu Joseph
2022-11-09 1:52 ` Sohil Mehta
2022-11-10 21:03 ` Hans de Goede
2022-11-07 22:53 ` [PATCH v2 02/14] platform/x86/intel/ifs: return a more appropriate Error code Jithu Joseph
2022-11-09 1:57 ` Sohil Mehta
2022-11-10 21:04 ` Hans de Goede
2022-11-07 22:53 ` [PATCH v2 03/14] platform/x86/intel/ifs: Remove image loading during init Jithu Joseph
2022-11-09 1:59 ` Sohil Mehta
2022-11-10 21:06 ` Hans de Goede
2022-11-07 22:53 ` [PATCH v2 04/14] x86/microcode/intel: Expose find_matching_signature() for IFS Jithu Joseph
2022-11-09 2:06 ` Sohil Mehta
2022-11-11 13:44 ` Borislav Petkov
2022-11-07 22:53 ` [PATCH v2 05/14] x86/microcode/intel: Use appropriate type in microcode_sanity_check() Jithu Joseph
2022-11-09 2:47 ` Sohil Mehta
2022-11-11 13:46 ` Borislav Petkov
2022-11-07 22:53 ` [PATCH v2 06/14] x86/microcode/intel: Expose microcode_sanity_check() Jithu Joseph
2022-11-09 3:03 ` Sohil Mehta
2022-11-09 3:29 ` Joseph, Jithu
2022-11-11 14:33 ` Borislav Petkov
2022-11-11 21:39 ` Joseph, Jithu
2022-11-07 22:53 ` [PATCH v2 07/14] x86/microcode/intel: Use a reserved field for metasize Jithu Joseph
2022-11-09 3:06 ` Sohil Mehta
2022-11-11 14:37 ` Borislav Petkov
2022-11-07 22:53 ` [PATCH v2 08/14] platform/x86/intel/ifs: Add metadata support Jithu Joseph
2022-11-09 3:25 ` Sohil Mehta
2022-11-10 21:08 ` Hans de Goede
2022-11-11 16:16 ` Borislav Petkov
2022-11-07 22:53 ` [PATCH v2 09/14] platform/x86/intel/ifs: Use generic microcode headers and functions Jithu Joseph
2022-11-09 3:29 ` Sohil Mehta
2022-11-10 21:11 ` Hans de Goede
2022-11-11 16:23 ` Borislav Petkov
2022-11-11 20:41 ` Joseph, Jithu
2022-11-16 17:26 ` Tony Luck
2022-11-16 18:53 ` Borislav Petkov
2022-11-16 19:02 ` Luck, Tony
2022-11-07 22:53 ` [PATCH v2 10/14] platform/x86/intel/ifs: Add metadata validation Jithu Joseph
2022-11-09 23:15 ` Sohil Mehta
2022-11-10 1:22 ` Joseph, Jithu
2022-11-10 9:40 ` Sohil Mehta
2022-11-10 21:18 ` Hans de Goede
2022-11-11 18:39 ` Borislav Petkov
2022-11-11 18:48 ` Dave Hansen
2022-11-11 20:30 ` Joseph, Jithu
2022-11-11 21:29 ` Ashok Raj
2022-11-07 22:53 ` [PATCH v2 11/14] platform/x86/intel/ifs: Remove reload sysfs entry Jithu Joseph
2022-11-09 23:16 ` Sohil Mehta
2022-11-10 21:19 ` Hans de Goede
2022-11-07 22:53 ` [PATCH v2 12/14] platform/x86/intel/ifs: Add current_batch " Jithu Joseph
2022-11-09 23:46 ` Sohil Mehta
2022-11-10 21:22 ` Hans de Goede
2022-11-12 16:26 ` Borislav Petkov
2022-11-12 18:21 ` Thiago Macieira
2022-11-12 19:20 ` Borislav Petkov
2022-11-12 19:58 ` Ashok Raj
2022-11-13 2:06 ` Thiago Macieira
2022-11-12 18:33 ` Luck, Tony
2022-11-12 19:28 ` Borislav Petkov
2022-11-12 23:32 ` Luck, Tony
2022-11-13 2:35 ` Thiago Macieira
2022-11-13 7:37 ` gregkh
2022-11-13 11:48 ` Borislav Petkov
2022-11-13 15:15 ` Ashok Raj
2022-11-13 15:58 ` Borislav Petkov
2022-11-13 17:01 ` Ashok Raj
2022-11-13 18:41 ` Borislav Petkov
2022-11-13 21:40 ` Thiago Macieira
2022-11-13 22:59 ` Borislav Petkov
2022-11-14 18:13 ` Dave Hansen
2022-11-14 18:25 ` Luck, Tony
2022-11-14 19:03 ` Borislav Petkov
2022-11-14 19:07 ` Luck, Tony
2022-11-14 19:17 ` Borislav Petkov
2022-11-14 19:38 ` Luck, Tony
2022-11-14 19:51 ` Borislav Petkov
2022-11-13 16:41 ` Joseph, Jithu
2022-11-13 16:58 ` Borislav Petkov
2022-11-13 17:55 ` Joseph, Jithu
2022-11-13 18:27 ` Borislav Petkov
2022-11-13 21:33 ` Tony Luck
2022-11-13 22:55 ` Borislav Petkov
2022-11-13 21:21 ` Thiago Macieira
2022-11-13 22:40 ` Borislav Petkov
2022-11-13 21:51 ` Thiago Macieira
2022-11-13 23:05 ` Borislav Petkov
2022-11-14 8:28 ` Hans de Goede
2022-11-14 7:15 ` gregkh
2022-11-14 15:33 ` Tony Luck
2022-11-14 15:47 ` Borislav Petkov
2022-11-19 16:24 ` [tip: x86/microcode] " tip-bot2 for Jithu Joseph
2022-11-07 22:53 ` [PATCH v2 13/14] Documentation/ABI: Update IFS ABI doc Jithu Joseph
2022-11-09 23:55 ` Sohil Mehta
2022-11-10 1:16 ` Joseph, Jithu
2022-11-10 21:33 ` Hans de Goede
2022-11-07 22:53 ` [PATCH v2 14/14] Revert "platform/x86/intel/ifs: Mark as BROKEN" Jithu Joseph
2022-11-09 23:57 ` Sohil Mehta
2022-11-10 21:34 ` Hans de Goede
2022-11-10 9:59 ` [PATCH v2 00/14] IFS multi test image support and misc changes Borislav Petkov
2022-11-10 21:37 ` Hans de Goede
2022-11-10 21:58 ` Joseph, Jithu
2022-11-17 3:59 ` [PATCH v3 00/16] " Jithu Joseph
2022-11-17 3:59 ` [PATCH v3 01/16] platform/x86/intel/ifs: Remove unused selection Jithu Joseph
2022-11-19 16:24 ` [tip: x86/microcode] " tip-bot2 for Jithu Joseph
2022-11-17 3:59 ` [PATCH v3 02/16] platform/x86/intel/ifs: Return a more appropriate Error code Jithu Joseph
2022-11-19 16:24 ` [tip: x86/microcode] platform/x86/intel/ifs: Return a more appropriate error code tip-bot2 for Jithu Joseph
2022-11-17 3:59 ` [PATCH v3 03/16] platform/x86/intel/ifs: Remove image loading during init Jithu Joseph
2022-11-19 16:24 ` [tip: x86/microcode] " tip-bot2 for Jithu Joseph
2022-11-17 3:59 ` [PATCH v3 04/16] platform/x86/intel/ifs: Remove memory allocation from load path Jithu Joseph
2022-11-17 8:51 ` Hans de Goede [this message]
2022-11-17 17:29 ` Jithu Joseph
2022-11-17 18:01 ` Hans de Goede
2022-11-17 19:59 ` Jithu Joseph
2022-11-17 21:13 ` Hans de Goede
2022-11-17 22:44 ` Joseph, Jithu
2022-11-19 16:24 ` [tip: x86/microcode] " tip-bot2 for Jithu Joseph
2022-11-17 3:59 ` [PATCH v3 05/16] x86/microcode/intel: Reuse find_matching_signature() Jithu Joseph
2022-11-19 16:24 ` [tip: x86/microcode] " tip-bot2 for Jithu Joseph
2022-11-17 3:59 ` [PATCH v3 06/16] x86/microcode/intel: Use appropriate type in microcode_sanity_check() Jithu Joseph
2022-11-19 16:24 ` [tip: x86/microcode] " tip-bot2 for Jithu Joseph
2022-11-17 3:59 ` [PATCH v3 07/16] x86/microcode/intel: Reuse microcode_sanity_check() Jithu Joseph
2022-11-19 16:24 ` [tip: x86/microcode] " tip-bot2 for Jithu Joseph
2022-11-17 3:59 ` [PATCH v3 08/16] x86/microcode/intel: Add hdr_type to intel_microcode_sanity_check() Jithu Joseph
2022-11-19 16:24 ` [tip: x86/microcode] " tip-bot2 for Jithu Joseph
2022-11-17 3:59 ` [PATCH v3 09/16] x86/microcode/intel: Use a reserved field for metasize Jithu Joseph
2022-11-19 16:24 ` [tip: x86/microcode] " tip-bot2 for Jithu Joseph
2022-11-17 3:59 ` [PATCH v3 10/16] platform/x86/intel/ifs: Add metadata support Jithu Joseph
2022-11-19 16:24 ` [tip: x86/microcode] " tip-bot2 for Ashok Raj
2022-11-17 3:59 ` [PATCH v3 11/16] platform/x86/intel/ifs: Use generic microcode headers and functions Jithu Joseph
2022-11-17 22:50 ` Jithu Joseph
2022-11-19 16:24 ` [tip: x86/microcode] " tip-bot2 for Jithu Joseph
2022-11-17 3:59 ` [PATCH v3 12/16] platform/x86/intel/ifs: Add metadata validation Jithu Joseph
2022-11-17 23:04 ` Jithu Joseph
2022-11-19 16:24 ` [tip: x86/microcode] " tip-bot2 for Jithu Joseph
2022-11-17 3:59 ` [PATCH v3 13/16] platform/x86/intel/ifs: Remove reload sysfs entry Jithu Joseph
2022-11-19 16:24 ` [tip: x86/microcode] " tip-bot2 for Jithu Joseph
2022-11-17 3:59 ` [PATCH v3 14/16] platform/x86/intel/ifs: Add current_batch " Jithu Joseph
2022-11-17 3:59 ` [PATCH v3 15/16] Documentation/ABI: Update IFS ABI doc Jithu Joseph
2022-11-19 16:23 ` [tip: x86/microcode] " tip-bot2 for Jithu Joseph
2022-11-17 3:59 ` [PATCH v3 16/16] Revert "platform/x86/intel/ifs: Mark as BROKEN" Jithu Joseph
2022-11-19 16:23 ` [tip: x86/microcode] " tip-bot2 for Jithu Joseph
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