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authorSean Christopherson <seanjc@google.com>2021-04-06 15:49:51 -0700
committerPaolo Bonzini <pbonzini@redhat.com>2021-04-21 12:20:07 -0400
commita402e35177797d736dd3dc2d8537c1c9ac90d54a (patch)
tree93362057bf4bae64a5c9c5dcda84993c7eacefa6 /drivers/crypto/ccp/sev-dev.c
parent38103671aad38e888743dd26c767869cfc15adca (diff)
crypto: ccp: Use the stack and common buffer for INIT command
Drop the dedicated init_cmd_buf and instead use a local variable. Now that the low level helper uses an internal buffer for all commands, using the stack for the upper layers is safe even when running with CONFIG_VMAP_STACK=y. Signed-off-by: Sean Christopherson <seanjc@google.com> Message-Id: <20210406224952.4177376-8-seanjc@google.com> Reviewed-by: Brijesh Singh <brijesh.singh@amd.com> Acked-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'drivers/crypto/ccp/sev-dev.c')
-rw-r--r--drivers/crypto/ccp/sev-dev.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/crypto/ccp/sev-dev.c b/drivers/crypto/ccp/sev-dev.c
index 2184c4a67d35..6ee703176049 100644
--- a/drivers/crypto/ccp/sev-dev.c
+++ b/drivers/crypto/ccp/sev-dev.c
@@ -234,6 +234,7 @@ static int sev_do_cmd(int cmd, void *data, int *psp_ret)
static int __sev_platform_init_locked(int *error)
{
struct psp_device *psp = psp_master;
+ struct sev_data_init data;
struct sev_device *sev;
int rc = 0;
@@ -245,6 +246,7 @@ static int __sev_platform_init_locked(int *error)
if (sev->state == SEV_STATE_INIT)
return 0;
+ memset(&data, 0, sizeof(data));
if (sev_es_tmr) {
u64 tmr_pa;
@@ -254,12 +256,12 @@ static int __sev_platform_init_locked(int *error)
*/
tmr_pa = __pa(sev_es_tmr);
- sev->init_cmd_buf.flags |= SEV_INIT_FLAGS_SEV_ES;
- sev->init_cmd_buf.tmr_address = tmr_pa;
- sev->init_cmd_buf.tmr_len = SEV_ES_TMR_SIZE;
+ data.flags |= SEV_INIT_FLAGS_SEV_ES;
+ data.tmr_address = tmr_pa;
+ data.tmr_len = SEV_ES_TMR_SIZE;
}
- rc = __sev_do_cmd_locked(SEV_CMD_INIT, &sev->init_cmd_buf, error);
+ rc = __sev_do_cmd_locked(SEV_CMD_INIT, &data, error);
if (rc)
return rc;