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Message-ID: <d71fc226253196de6d53ef77752bd094546de296.camel@kernel.org>
Subject: Re: [PATCH v8 4/7] x86/sgx: Add SGX infrastructure to recover from
 poison
From:   Jarkko Sakkinen <jarkko@kernel.org>
To:     Tony Luck <tony.luck@intel.com>,
        Sean Christopherson <seanjc@google.com>,
        Dave Hansen <dave.hansen@intel.com>
Cc:     Cathy Zhang <cathy.zhang@intel.com>, linux-sgx@vger.kernel.org
Date:   Tue, 05 Oct 2021 02:30:34 +0300
In-Reply-To: <20211001164724.220532-5-tony.luck@intel.com>
References: <20210927213452.212470-1-tony.luck@intel.com>
         <20211001164724.220532-1-tony.luck@intel.com>
         <20211001164724.220532-5-tony.luck@intel.com>
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On Fri, 2021-10-01 at 09:47 -0700, Tony Luck wrote:
> Provide a recovery function sgx_memory_failure(). If the poison was
> consumed synchronously then send a SIGBUS. Note that the virtual
> address of the access is not included with the SIGBUS as is the case
> for poison outside of SGX enclaves. This doesn't matter as addresses
> of code/data inside an enclave is of little to no use to code executing
> outside the (now dead) enclave.
>=20
> Poison found in a free page results in the page being moved from the
> free list to the poison page list.
>=20
> Signed-off-by: Tony Luck <tony.luck@intel.com>


Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>

/Jarkko