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[PATCH 6/6] spapr_pci: add spapr msi read method
From: |
P J P |
Subject: |
[PATCH 6/6] spapr_pci: add spapr msi read method |
Date: |
Wed, 17 Jun 2020 11:09:33 +0530 |
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 | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c
index 83f1453096..d4193be205 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.
@@ -756,7 +763,7 @@ 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 = spapr_msi_read,
.write = spapr_msi_write,
.endianness = DEVICE_LITTLE_ENDIAN
};
--
2.26.2
- [PATCH 0/6] Add various undefined MMIO r/w functions, P J P, 2020/06/17
- [PATCH 1/6] hw/pci-host: add pci-intack write method, P J P, 2020/06/17
- [PATCH 2/6] pci-host: add pcie-msi read method, P J P, 2020/06/17
- [PATCH 3/6] vfio: add quirk device write method, P J P, 2020/06/17
- [PATCH 4/6] prep: add ppc-parity write method, P J P, 2020/06/17
- [PATCH 5/6] nvram: add nrf51_soc flash read method, P J P, 2020/06/17
- [PATCH 6/6] spapr_pci: add spapr msi read method,
P J P <=
- Re: [PATCH 0/6] Add various undefined MMIO r/w functions, no-reply, 2020/06/17
- Re: [PATCH 0/6] Add various undefined MMIO r/w functions, David Gibson, 2020/06/17