From 18aa91cddd8caa14aae094f9b59c0381959cb320 Mon Sep 17 00:00:00 2001 From: Wei Huang Date: Fri, 22 Apr 2022 00:51:46 -0500 Subject: hw/i386/amd_iommu: Fix IOMMU event log encoding errors Coverity issues several UNINIT warnings against amd_iommu.c [1]. This patch fixes them by clearing evt before encoding. On top of it, this patch changes the event log size to 16 bytes per IOMMU specification, and fixes the event log entry format in amdvi_encode_event(). [1] CID 1487116/1487200/1487190/1487232/1487115/1487258 Reported-by: Peter Maydell Signed-off-by: Wei Huang Message-Id: <20220422055146.3312226-1-wei.huang2@amd.com> Reviewed-by: Peter Maydell Acked-by: Jason Wang Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- hw/i386/amd_iommu.c | 24 ++++++++++++++---------- 1 file changed, 14 insertions(+), 10 deletions(-) (limited to 'hw/i386') diff --git a/hw/i386/amd_iommu.c b/hw/i386/amd_iommu.c index ea8eaeb..725f690 100644 --- a/hw/i386/amd_iommu.c +++ b/hw/i386/amd_iommu.c @@ -201,15 +201,18 @@ static void amdvi_setevent_bits(uint64_t *buffer, uint64_t value, int start, /* * AMDVi event structure * 0:15 -> DeviceID - * 55:63 -> event type + miscellaneous info - * 63:127 -> related address + * 48:63 -> event type + miscellaneous info + * 64:127 -> related address */ static void amdvi_encode_event(uint64_t *evt, uint16_t devid, uint64_t addr, uint16_t info) { + evt[0] = 0; + evt[1] = 0; + amdvi_setevent_bits(evt, devid, 0, 16); - amdvi_setevent_bits(evt, info, 55, 8); - amdvi_setevent_bits(evt, addr, 63, 64); + amdvi_setevent_bits(evt, info, 48, 16); + amdvi_setevent_bits(evt, addr, 64, 64); } /* log an error encountered during a page walk * @@ -218,7 +221,7 @@ static void amdvi_encode_event(uint64_t *evt, uint16_t devid, uint64_t addr, static void amdvi_page_fault(AMDVIState *s, uint16_t devid, hwaddr addr, uint16_t info) { - uint64_t evt[4]; + uint64_t evt[2]; info |= AMDVI_EVENT_IOPF_I | AMDVI_EVENT_IOPF; amdvi_encode_event(evt, devid, addr, info); @@ -234,7 +237,7 @@ static void amdvi_page_fault(AMDVIState *s, uint16_t devid, static void amdvi_log_devtab_error(AMDVIState *s, uint16_t devid, hwaddr devtab, uint16_t info) { - uint64_t evt[4]; + uint64_t evt[2]; info |= AMDVI_EVENT_DEV_TAB_HW_ERROR; @@ -248,7 +251,8 @@ static void amdvi_log_devtab_error(AMDVIState *s, uint16_t devid, */ static void amdvi_log_command_error(AMDVIState *s, hwaddr addr) { - uint64_t evt[4], info = AMDVI_EVENT_COMMAND_HW_ERROR; + uint64_t evt[2]; + uint16_t info = AMDVI_EVENT_COMMAND_HW_ERROR; amdvi_encode_event(evt, 0, addr, info); amdvi_log_event(s, evt); @@ -261,7 +265,7 @@ static void amdvi_log_command_error(AMDVIState *s, hwaddr addr) static void amdvi_log_illegalcom_error(AMDVIState *s, uint16_t info, hwaddr addr) { - uint64_t evt[4]; + uint64_t evt[2]; info |= AMDVI_EVENT_ILLEGAL_COMMAND_ERROR; amdvi_encode_event(evt, 0, addr, info); @@ -276,7 +280,7 @@ static void amdvi_log_illegalcom_error(AMDVIState *s, uint16_t info, static void amdvi_log_illegaldevtab_error(AMDVIState *s, uint16_t devid, hwaddr addr, uint16_t info) { - uint64_t evt[4]; + uint64_t evt[2]; info |= AMDVI_EVENT_ILLEGAL_DEVTAB_ENTRY; amdvi_encode_event(evt, devid, addr, info); @@ -288,7 +292,7 @@ static void amdvi_log_illegaldevtab_error(AMDVIState *s, uint16_t devid, static void amdvi_log_pagetab_error(AMDVIState *s, uint16_t devid, hwaddr addr, uint16_t info) { - uint64_t evt[4]; + uint64_t evt[2]; info |= AMDVI_EVENT_PAGE_TAB_HW_ERROR; amdvi_encode_event(evt, devid, addr, info); -- cgit v1.1