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    SubjectRe: [PATCH crypto-2.6] crypto: ccp: add timeout support in the SEV command
    On Wed, Aug 15, 2018 at 04:11:25PM -0500, Brijesh Singh wrote:
    > Currently, the CCP driver assumes that the SEV command issued to the PSP
    > will always return (i.e. it will never hang). But recently, firmware bugs
    > have shown that a command can hang. Since of the SEV commands are used
    > in probe routines, this can cause boot hangs and/or loss of virtualization
    > capabilities.
    >
    > To protect against firmware bugs, add a timeout in the SEV command
    > execution flow. If a command does not complete within the specified
    > timeout then return -ETIMEOUT and stop the driver from executing any
    > further commands since the state of the SEV firmware is unknown.
    >
    > Cc: Tom Lendacky <thomas.lendacky@amd.com>
    > Cc: Gary Hook <Gary.Hook@amd.com>
    > Cc: Herbert Xu <herbert@gondor.apana.org.au>
    > Cc: linux-kernel@vger.kernel.org
    > Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
    > ---
    > drivers/crypto/ccp/psp-dev.c | 46 +++++++++++++++++++++++++++++++++++++++-----
    > 1 file changed, 41 insertions(+), 5 deletions(-)

    Patch applied. Thanks.
    --
    Email: Herbert Xu <herbert@gondor.apana.org.au>
    Home Page: http://gondor.apana.org.au/~herbert/
    PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt

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