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From: "Daniel P. Berrangé" <berrange@redhat.com>
To: Dov Murik <dovmurik@linux.ibm.com>
Cc: "Tom Lendacky" <thomas.lendacky@amd.com>,
	"Ashish Kalra" <ashish.kalra@amd.com>,
	"Brijesh Singh" <brijesh.singh@amd.com>,
	"Eduardo Habkost" <ehabkost@redhat.com>,
	"Michael S. Tsirkin" <mst@redhat.com>,
	"Connor Kuehl" <ckuehl@redhat.com>,
	"Philippe Mathieu-Daudé" <philmd@redhat.com>,
	"James Bottomley" <jejb@linux.ibm.com>,
	"Richard Henderson" <richard.henderson@linaro.org>,
	qemu-devel@nongnu.org,
	"Dr. David Alan Gilbert" <dgilbert@redhat.com>,
	"Hubertus Franke" <frankeh@us.ibm.com>,
	"Jim Cadden" <jcadden@ibm.com>,
	"Tobin Feldman-Fitzthum" <tobin@linux.ibm.com>,
	"Paolo Bonzini" <pbonzini@redhat.com>,
	"Laszlo Ersek" <lersek@redhat.com>
Subject: Re: [PATCH v3 1/2] sev/i386: Introduce sev_add_kernel_loader_hashes for measured linux boot
Date: Mon, 27 Sep 2021 18:00:12 +0100	[thread overview]
Message-ID: <YVH4nLO+tuzNIDsC@redhat.com> (raw)
In-Reply-To: <20210825073538.959525-2-dovmurik@linux.ibm.com>

On Wed, Aug 25, 2021 at 07:35:37AM +0000, Dov Murik wrote:
> Add the sev_add_kernel_loader_hashes function to calculate the hashes of
> the kernel/initrd/cmdline and fill a designated OVMF encrypted hash
> table area.  For this to work, OVMF must support an encrypted area to
> place the data which is advertised via a special GUID in the OVMF reset
> table.
> 
> The hashes of each of the files is calculated (or the string in the case
> of the cmdline with trailing '\0' included).  Each entry in the hashes
> table is GUID identified and since they're passed through the
> sev_encrypt_flash interface, the hashes will be accumulated by the PSP
> measurement (SEV_LAUNCH_MEASURE).
> 
> Co-developed-by: James Bottomley <jejb@linux.ibm.com>
> Signed-off-by: James Bottomley <jejb@linux.ibm.com>
> Signed-off-by: Dov Murik <dovmurik@linux.ibm.com>
> Reviewed-by: Connor Kuehl <ckuehl@redhat.com>
> ---
>  target/i386/sev_i386.h |  12 ++++
>  target/i386/sev-stub.c |   5 ++
>  target/i386/sev.c      | 137 +++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 154 insertions(+)
> 
> diff --git a/target/i386/sev_i386.h b/target/i386/sev_i386.h
> index ae6d840478..deb3eec409 100644
> --- a/target/i386/sev_i386.h
> +++ b/target/i386/sev_i386.h
> @@ -28,6 +28,17 @@
>  #define SEV_POLICY_DOMAIN       0x10
>  #define SEV_POLICY_SEV          0x20
>  
> +typedef struct KernelLoaderContext {
> +    char *setup_data;
> +    size_t setup_size;
> +    char *kernel_data;
> +    size_t kernel_size;
> +    char *initrd_data;
> +    size_t initrd_size;
> +    char *cmdline_data;
> +    size_t cmdline_size;
> +} KernelLoaderContext;

I'd expect the struct to have 'Sev' as its name prefix, in common
with everything else SEV related that's exported here. 

> +
>  extern bool sev_es_enabled(void);
>  extern uint64_t sev_get_me_mask(void);
>  extern SevInfo *sev_get_info(void);
> @@ -37,5 +48,6 @@ extern char *sev_get_launch_measurement(void);
>  extern SevCapability *sev_get_capabilities(Error **errp);
>  extern SevAttestationReport *
>  sev_get_attestation_report(const char *mnonce, Error **errp);
> +extern bool sev_add_kernel_loader_hashes(KernelLoaderContext *ctx, Error **errp);

Regards,
Daniel
-- 
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  reply	other threads:[~2021-09-27 17:08 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-25  7:35 [PATCH v3 0/2] [RESEND] x86/sev: Measured Linux SEV guest with kernel/initrd/cmdline Dov Murik
2021-08-25  7:35 ` [PATCH v3 1/2] sev/i386: Introduce sev_add_kernel_loader_hashes for measured linux boot Dov Murik
2021-09-27 17:00   ` Daniel P. Berrangé [this message]
2021-09-29  9:39     ` Dov Murik
2021-08-25  7:35 ` [PATCH v3 2/2] x86/sev: generate SEV kernel loader hashes in x86_load_linux Dov Murik
2021-09-27 17:03   ` Daniel P. Berrangé
2021-09-29  9:42     ` Dov Murik
2021-09-02 12:02 ` [PATCH v3 0/2] [RESEND] x86/sev: Measured Linux SEV guest with kernel/initrd/cmdline Dov Murik
  -- strict thread matches above, loose matches on Subject: below --
2021-06-24 10:20 [PATCH v3 0/2] " Dov Murik
2021-06-24 10:20 ` [PATCH v3 1/2] sev/i386: Introduce sev_add_kernel_loader_hashes for measured linux boot Dov Murik
2021-07-01 17:23   ` Connor Kuehl
2021-07-02 12:29     ` Dov Murik

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