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[PATCH v2 2/3] tpm-ppi: page-align PPI RAM

From: Marc-André Lureau
Subject: [PATCH v2 2/3] tpm-ppi: page-align PPI RAM
Date: Fri, 3 Jan 2020 11:39:59 +0400

post-copy migration fails on destination with error such as:
2019-12-26T10:22:44.714644Z qemu-kvm: ram_block_discard_range:
Unaligned start address: 0x559d2afae9a0

Use qemu_memalign() to constrain the PPI RAM memory alignment.

Cc: address@hidden
Signed-off-by: Marc-André Lureau <address@hidden>
Reviewed-by: Philippe Mathieu-Daudé <address@hidden>
 hw/tpm/tpm_ppi.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/hw/tpm/tpm_ppi.c b/hw/tpm/tpm_ppi.c
index ff314592b4..6d9c1a3e40 100644
--- a/hw/tpm/tpm_ppi.c
+++ b/hw/tpm/tpm_ppi.c
@@ -43,7 +43,8 @@ void tpm_ppi_reset(TPMPPI *tpmppi)
 void tpm_ppi_init(TPMPPI *tpmppi, struct MemoryRegion *m,
                   hwaddr addr, Object *obj)
-    tpmppi->buf = g_malloc0(HOST_PAGE_ALIGN(TPM_PPI_ADDR_SIZE));
+    tpmppi->buf = qemu_memalign(qemu_real_host_page_size,
+                                HOST_PAGE_ALIGN(TPM_PPI_ADDR_SIZE));
     memory_region_init_ram_device_ptr(&tpmppi->ram, obj, "tpm-ppi",
                                       TPM_PPI_ADDR_SIZE, tpmppi->buf);
     vmstate_register_ram(&tpmppi->ram, DEVICE(obj));

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