From: Daniel P. Berrangé <berra...@redhat.com>
The 'tpm_execute' method has a pair of 4k arrays used for copying
data between guest and host. Skip the automatic zero-init of these
arrays to eliminate the performance overhead in the I/O hot path.
The two arrays will be fully initialized when reading data from
guest memory or reading data from the proxy FD.
Signed-off-by: Daniel P. Berrangé <berra...@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefa...@redhat.com>
Reviewed-by: Klaus Jensen <k.jen...@samsung.com>
Reviewed-by: Harsh Prateek Bora <hars...@linux.ibm.com>
Message-id: 20250610123709.835102-26-berra...@redhat.com
Signed-off-by: Stefan Hajnoczi <stefa...@redhat.com>
---
hw/ppc/spapr_tpm_proxy.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/hw/ppc/spapr_tpm_proxy.c b/hw/ppc/spapr_tpm_proxy.c
index 862eeaa50a..1297b3ad56 100644
--- a/hw/ppc/spapr_tpm_proxy.c
+++ b/hw/ppc/spapr_tpm_proxy.c
@@ -41,8 +41,8 @@ static ssize_t tpm_execute(SpaprTpmProxy *tpm_proxy,
target_ulong *args)
target_ulong data_in_size = args[2];
uint64_t data_out = ppc64_phys_to_real(args[3]);
target_ulong data_out_size = args[4];
- uint8_t buf_in[TPM_SPAPR_BUFSIZE];
- uint8_t buf_out[TPM_SPAPR_BUFSIZE];
+ QEMU_UNINITIALIZED uint8_t buf_in[TPM_SPAPR_BUFSIZE];
+ QEMU_UNINITIALIZED uint8_t buf_out[TPM_SPAPR_BUFSIZE];
ssize_t ret;
trace_spapr_tpm_execute(data_in, data_in_size, data_out, data_out_size);
--
2.49.0
