On Wed, Feb 19, 2025 at 12:53 PM Ashish Kalra <Ashish.Kalra@xxxxxxx> wrote: > > From: Ashish Kalra <ashish.kalra@xxxxxxx> > > When SEV-SNP is enabled the TMR needs to be 2MB aligned and 2MB sized, > ensure that TMR size is reset back to default when SNP is shutdown as > SNP initialization and shutdown as part of some SNP ioctls may leave > TMR size modified and cause subsequent SEV only initialization to fail. > > Signed-off-by: Ashish Kalra <ashish.kalra@xxxxxxx> Acked-by: Dionna Glaze <dionnaglaze@xxxxxxxxxx> > --- > drivers/crypto/ccp/sev-dev.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/crypto/ccp/sev-dev.c b/drivers/crypto/ccp/sev-dev.c > index b06f43eb18f7..be8a84ce24c7 100644 > --- a/drivers/crypto/ccp/sev-dev.c > +++ b/drivers/crypto/ccp/sev-dev.c > @@ -1751,6 +1751,9 @@ static int __sev_snp_shutdown_locked(int *error, bool panic) > sev->snp_initialized = false; > dev_dbg(sev->dev, "SEV-SNP firmware shutdown\n"); > > + /* Reset TMR size back to default */ > + sev_es_tmr_size = SEV_TMR_SIZE; > + > return ret; > } > > -- > 2.34.1 > -- -Dionna Glaze, PhD, CISSP, CCSP (she/her)
