From: P J P <ppandit@redhat.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Peter Maydell" <peter.maydell@linaro.org>,
"Prasad J Pandit" <pjp@fedoraproject.org>,
"Philippe Mathieu-Daudé" <philmd@redhat.com>,
"Li Qiang" <liq3ea@gmail.com>,
"QEMU Developers" <qemu-devel@nongnu.org>,
"Lei Sun" <slei.casper@gmail.com>,
"Alex Williamson" <alex.williamson@redhat.com>,
"Alex Bennée" <alex.bennee@linaro.org>,
"David Gibson" <david@gibson.dropbear.id.au>
Subject: [PATCH v2 6/9] spapr_pci: add spapr msi read method
Date: Thu, 25 Jun 2020 00:25:20 +0530 [thread overview]
Message-ID: <20200624185523.762240-7-ppandit@redhat.com> (raw)
In-Reply-To: <20200624185523.762240-1-ppandit@redhat.com>
From: Prasad J Pandit <pjp@fedoraproject.org>
Add spapr msi mmio read method to avoid NULL pointer dereference
issue.
Reported-by: Lei Sun <slei.casper@gmail.com>
Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
---
hw/ppc/spapr_pci.c | 13 +++++++++++--
1 file changed, 11 insertions(+), 2 deletions(-)
diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c
index 329002ac04..7033352834 100644
--- a/hw/ppc/spapr_pci.c
+++ b/hw/ppc/spapr_pci.c
@@ -52,6 +52,7 @@
#include "sysemu/kvm.h"
#include "sysemu/hostmem.h"
#include "sysemu/numa.h"
+#include "qemu/log.h"
/* Copied from the kernel arch/powerpc/platforms/pseries/msi.c */
#define RTAS_QUERY_FN 0
@@ -738,6 +739,12 @@ static PCIINTxRoute spapr_route_intx_pin_to_irq(void *opaque, int pin)
return route;
}
+static uint64_t spapr_msi_read(void *opaque, hwaddr addr, unsigned size)
+{
+ qemu_log_mask(LOG_UNIMP, "%s not implemented\n", __func__);
+ return 0;
+}
+
/*
* MSI/MSIX memory region implementation.
* The handler handles both MSI and MSIX.
@@ -755,8 +762,10 @@ static void spapr_msi_write(void *opaque, hwaddr addr,
}
static const MemoryRegionOps spapr_msi_ops = {
- /* There is no .read as the read result is undefined by PCI spec */
- .read = NULL,
+ /* .read result is undefined by PCI spec
+ * define .read method to avoid assert failure in memory_region_init_io
+ */
+ .read = spapr_msi_read,
.write = spapr_msi_write,
.endianness = DEVICE_LITTLE_ENDIAN
};
--
2.26.2
next prev parent reply other threads:[~2020-06-24 19:11 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-24 18:55 [PATCH v2 0/9] memory: assert and define MemoryRegionOps callbacks P J P
2020-06-24 18:55 ` [PATCH v2 1/9] hw/pci-host: add pci-intack write method P J P
2020-06-29 9:20 ` Li Qiang
2020-06-24 18:55 ` [PATCH v2 2/9] pci-host: add pcie-msi read method P J P
2020-06-29 9:30 ` Li Qiang
2020-06-24 18:55 ` [PATCH v2 3/9] vfio: add quirk device write method P J P
2020-06-29 9:36 ` Li Qiang
2020-06-24 18:55 ` [PATCH v2 4/9] prep: add ppc-parity " P J P
2020-06-25 1:40 ` David Gibson
2020-06-25 6:24 ` Philippe Mathieu-Daudé
2020-06-29 11:22 ` Li Qiang
2020-07-21 8:24 ` Philippe Mathieu-Daudé
2020-06-24 18:55 ` [PATCH v2 5/9] nvram: add nrf51_soc flash read method P J P
2020-06-29 11:17 ` Li Qiang
2020-06-29 11:55 ` P J P
2020-06-29 15:32 ` Paolo Bonzini
2020-06-29 16:05 ` Li Qiang
2020-06-29 15:31 ` Paolo Bonzini
2020-07-16 16:27 ` Peter Maydell
2020-07-21 6:47 ` P J P
2020-07-21 8:33 ` Philippe Mathieu-Daudé
2020-07-21 9:48 ` P J P
2020-06-24 18:55 ` P J P [this message]
2020-06-25 1:41 ` [PATCH v2 6/9] spapr_pci: add spapr msi " David Gibson
2020-06-29 9:55 ` Li Qiang
2020-06-24 18:55 ` [PATCH v2 7/9] tz-ppc: add dummy read/write methods P J P
2020-06-25 6:29 ` Philippe Mathieu-Daudé
2020-06-25 9:18 ` P J P
2020-06-25 10:21 ` Philippe Mathieu-Daudé
2020-06-25 11:24 ` P J P
2020-06-29 15:33 ` Paolo Bonzini
2020-06-25 12:22 ` Peter Maydell
2020-06-29 10:44 ` Li Qiang
2020-06-29 11:48 ` P J P
2020-06-24 18:55 ` [PATCH v2 8/9] imx7-ccm: add digprog mmio write method P J P
2020-06-29 10:47 ` Li Qiang
2020-06-24 18:55 ` [PATCH v2 9/9] memory: assert MemoryRegionOps callbacks are defined P J P
2020-06-29 11:28 ` Li Qiang
2020-06-24 21:35 ` [PATCH v2 0/9] memory: assert and define MemoryRegionOps callbacks no-reply
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