From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:41883) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bxKYr-0004cv-9C for qemu-devel@nongnu.org; Thu, 20 Oct 2016 17:07:38 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bxKYo-0006zX-PH for qemu-devel@nongnu.org; Thu, 20 Oct 2016 17:07:37 -0400 Received: from mail-lf0-x242.google.com ([2a00:1450:4010:c07::242]:34432) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1bxKYo-0006zE-Ha for qemu-devel@nongnu.org; Thu, 20 Oct 2016 17:07:34 -0400 Received: by mail-lf0-x242.google.com with SMTP id x23so2133331lfi.1 for ; Thu, 20 Oct 2016 14:07:34 -0700 (PDT) From: "Aviv B.D" Date: Fri, 21 Oct 2016 00:07:19 +0300 Message-Id: <1476997641-29648-2-git-send-email-bd.aviv@gmail.com> In-Reply-To: <1476997641-29648-1-git-send-email-bd.aviv@gmail.com> References: <1476997641-29648-1-git-send-email-bd.aviv@gmail.com> Subject: [Qemu-devel] [PATCH v5 1/3] IOMMU: add option to enable VTD_CAP_CM to vIOMMU capility exposoed to guest List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: "Michael S. Tsirkin" , Alex Williamson , Peter Xu , Jan Kiszka , Aviv Ben-David From: "Aviv Ben-David" This capability asks the guest to invalidate cache before each map operation. We can use this invalidation to trap map operations in the hypervisor. Signed-off-by: Aviv Ben-David --- hw/i386/intel_iommu.c | 5 +++++ hw/i386/intel_iommu_internal.h | 1 + include/hw/i386/intel_iommu.h | 2 ++ 3 files changed, 8 insertions(+) diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c index 1655a65..834887f 100644 --- a/hw/i386/intel_iommu.c +++ b/hw/i386/intel_iommu.c @@ -2017,6 +2017,7 @@ static Property vtd_properties[] = { DEFINE_PROP_ON_OFF_AUTO("eim", IntelIOMMUState, intr_eim, ON_OFF_AUTO_AUTO), DEFINE_PROP_BOOL("x-buggy-eim", IntelIOMMUState, buggy_eim, false), + DEFINE_PROP_BOOL("cache-mode", IntelIOMMUState, cache_mode_enabled, FALSE), DEFINE_PROP_END_OF_LIST(), }; @@ -2391,6 +2392,10 @@ static void vtd_init(IntelIOMMUState *s) assert(s->intr_eim != ON_OFF_AUTO_AUTO); } + if (s->cache_mode_enabled) { + s->cap |= VTD_CAP_CM; + } + vtd_reset_context_cache(s); vtd_reset_iotlb(s); diff --git a/hw/i386/intel_iommu_internal.h b/hw/i386/intel_iommu_internal.h index 0829a50..35d9f3a 100644 --- a/hw/i386/intel_iommu_internal.h +++ b/hw/i386/intel_iommu_internal.h @@ -201,6 +201,7 @@ #define VTD_CAP_MAMV (VTD_MAMV << 48) #define VTD_CAP_PSI (1ULL << 39) #define VTD_CAP_SLLPS ((1ULL << 34) | (1ULL << 35)) +#define VTD_CAP_CM (1ULL << 7) /* Supported Adjusted Guest Address Widths */ #define VTD_CAP_SAGAW_SHIFT 8 diff --git a/include/hw/i386/intel_iommu.h b/include/hw/i386/intel_iommu.h index 1989c1e..42d293f 100644 --- a/include/hw/i386/intel_iommu.h +++ b/include/hw/i386/intel_iommu.h @@ -258,6 +258,8 @@ struct IntelIOMMUState { uint8_t womask[DMAR_REG_SIZE]; /* WO (write only - read returns 0) */ uint32_t version; + bool cache_mode_enabled; /* RO - is cap CM enabled? */ + dma_addr_t root; /* Current root table pointer */ bool root_extended; /* Type of root table (extended or not) */ bool dmar_enabled; /* Set if DMA remapping is enabled */ -- 1.9.1