From: joeyli <jlee@suse.com>
To: "Lee, Chun-Yi" <joeyli.kernel@gmail.com>, linux-kernel@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, linux-efi@vger.kernel.org,
linux-pm@vger.kernel.org, "Rafael J. Wysocki" <rjw@rjwysocki.net>,
Matthew Garrett <matthew.garrett@nebula.com>,
Len Brown <len.brown@intel.com>, Pavel Machek <pavel@ucw.cz>,
Josh Boyer <jwboyer@redhat.com>, Vojtech Pavlik <vojtech@suse.cz>,
Matt Fleming <matt.fleming@intel.com>,
Jiri Kosina <jkosina@suse.cz>, "H. Peter Anvin" <hpa@zytor.com>,
Ingo Molnar <mingo@redhat.com>
Subject: Re: [PATCH v2 09/16] PM / hibernate: Reserve hibernation key and erase footprints
Date: Thu, 13 Aug 2015 22:33:37 +0800 [thread overview]
Message-ID: <20150813143337.GA31748@linux-rxt1.site> (raw)
In-Reply-To: <1439273796-25359-10-git-send-email-jlee@suse.com>
On Tue, Aug 11, 2015 at 02:16:29PM +0800, Lee, Chun-Yi wrote:
> Add handler to parse the setup data that carrying hibernation key, it
> reserves hibernation key by memblock then copies key to a allocated page
> in later initcall stage.
>
[...snip]
> diff --git a/arch/x86/power/hibernate_keys.c b/arch/x86/power/hibernate_keys.c
> new file mode 100644
> index 0000000..357dc0e
> --- /dev/null
> +++ b/arch/x86/power/hibernate_keys.c
> @@ -0,0 +1,78 @@
> +/* Hibernation keys handler
> + *
[...snip]
> +static int __init init_hibernation_keys(void)
> +{
> + struct hibernation_keys *keys;
> + int ret = 0;
> +
> + if (!keys_phys_addr)
> + return -ENODEV;
> +
> + keys = early_memremap(keys_phys_addr, sizeof(struct hibernation_keys));
> +
> + /* Copy hibernation keys to a allocated page */
> + hibernation_keys = (struct hibernation_keys *)get_zeroed_page(GFP_KERNEL);
> + if (hibernation_keys) {
> + *hibernation_keys = *keys;
> + } else {
> + pr_err("PM: Allocate hibernation keys page failed\n");
> + ret = -ENOMEM;
> + }
> +
> + /* Erase keys data no matter copy success or failed */
> + memset(keys, 0, sizeof(struct hibernation_keys));
> + early_memunmap(keys, sizeof(struct hibernation_keys));
> + memblock_free(keys_phys_addr, sizeof(struct hibernation_keys));
> + keys_phys_addr = 0;
> +
> + return ret;
> +}
> +
> +late_initcall(init_hibernation_keys);
Yu's reviewing triggered me rethinking...
I afraid that's too late in late_initcall stage for copying key data that
reserved by memblock. I will try to move this copy action to setup_arch().
Regards
Joey Lee
next prev parent reply other threads:[~2015-08-13 14:34 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-11 6:16 [PATCH v2 00/16] Signature verification of hibernate snapshot Lee, Chun-Yi
2015-08-11 6:16 ` [PATCH v2 01/16] PM / hibernate: define HMAC algorithm and digest size of hibernation Lee, Chun-Yi
2015-08-11 6:16 ` [PATCH v2 02/16] x86/efi: Add get and set variable to EFI services pointer table Lee, Chun-Yi
2015-08-19 16:35 ` Matt Fleming
2015-08-11 6:16 ` [PATCH v2 03/16] x86/boot: Public getting random boot function Lee, Chun-Yi
2015-08-11 6:16 ` [PATCH v2 04/16] x86/efi: Generating random number in EFI stub Lee, Chun-Yi
2015-08-20 14:12 ` Matt Fleming
2015-08-27 4:06 ` joeyli
2015-08-11 6:16 ` [PATCH v2 05/16] x86/efi: Get entropy through EFI random number generator protocol Lee, Chun-Yi
2015-08-20 14:47 ` Matt Fleming
2015-08-27 4:51 ` joeyli
2015-08-20 20:26 ` Matt Fleming
2015-08-27 6:17 ` joeyli
2015-08-11 6:16 ` [PATCH v2 06/16] x86/efi: Generating random HMAC key for siging hibernate image Lee, Chun-Yi
2015-08-20 20:40 ` Matt Fleming
2015-08-27 9:04 ` joeyli
2015-09-09 12:15 ` Matt Fleming
2015-09-13 2:47 ` joeyli
2015-08-11 6:16 ` [PATCH v2 07/16] efi: Make efi_status_to_err() public Lee, Chun-Yi
2015-08-20 15:07 ` Matt Fleming
2015-08-27 9:06 ` joeyli
2015-08-11 6:16 ` [PATCH v2 08/16] x86/efi: Carrying hibernation key by setup data Lee, Chun-Yi
2015-08-15 17:07 ` Pavel Machek
2015-08-16 5:28 ` joeyli
2015-08-16 21:23 ` Jiri Kosina
2015-08-17 6:54 ` Nigel Cunningham
2015-08-21 12:40 ` Matt Fleming
2015-08-27 9:28 ` joeyli
2015-08-11 6:16 ` [PATCH v2 09/16] PM / hibernate: Reserve hibernation key and erase footprints Lee, Chun-Yi
2015-08-13 2:45 ` Chen, Yu C
2015-08-13 3:25 ` joeyli
2015-08-13 14:33 ` joeyli [this message]
2015-08-21 13:27 ` Matt Fleming
2015-08-27 10:21 ` joeyli
2015-09-09 12:24 ` Matt Fleming
2015-09-13 2:58 ` joeyli
2015-08-11 6:16 ` [PATCH v2 10/16] PM / hibernate: Generate and verify signature of hibernate snapshot Lee, Chun-Yi
2015-08-11 6:16 ` [PATCH v2 11/16] PM / hibernate: Avoid including hibernation key to hibernate image Lee, Chun-Yi
2015-08-11 6:16 ` [PATCH v2 12/16] PM / hibernate: Forward signature verifying result and key to image kernel Lee, Chun-Yi
2015-08-11 6:16 ` [PATCH v2 13/16] PM / hibernate: Add configuration to enforce signature verification Lee, Chun-Yi
2015-08-11 6:16 ` [PATCH v2 14/16] PM / hibernate: Allow user trigger hibernation key re-generating Lee, Chun-Yi
2015-08-11 6:16 ` [PATCH v2 15/16] PM / hibernate: Bypass verification logic on legacy BIOS Lee, Chun-Yi
2015-08-11 6:16 ` [PATCH v2 16/16] PM / hibernate: Document signature verification of hibernate snapshot Lee, Chun-Yi
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