From: Tianyu Lan <ltykernel@gmail.com> To: kys@microsoft.com, haiyangz@microsoft.com, sthemmin@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, x86@kernel.org, hpa@zytor.com, dave.hansen@linux.intel.com, luto@kernel.org, peterz@infradead.org, konrad.wilk@oracle.com, boris.ostrovsky@oracle.com, jgross@suse.com, sstabellini@kernel.org, joro@8bytes.org, will@kernel.org, davem@davemloft.net, kuba@kernel.org, jejb@linux.ibm.com, martin.petersen@oracle.com, arnd@arndb.de, hch@lst.de, m.szyprowski@samsung.com, robin.murphy@arm.com, thomas.lendacky@amd.com, brijesh.singh@amd.com, ardb@kernel.org, Tianyu.Lan@microsoft.com, pgonda@google.com, martin.b.radev@gmail.com, akpm@linux-foundation.org, kirill.shutemov@linux.intel.com, rppt@kernel.org, sfr@canb.auug.org.au, saravanand@fb.com, krish.sadhukhan@oracle.com, aneesh.kumar@linux.ibm.com, xen-devel@lists.xenproject.org, rientjes@google.com, hannes@cmpxchg.org, tj@kernel.org, michael.h.kelley@microsoft.com Cc: iommu@lists.linux-foundation.org, linux-arch@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org, netdev@vger.kernel.org, vkuznets@redhat.com, parri.andrea@gmail.com, dave.hansen@intel.com Subject: [PATCH V3 07/13] HV/Vmbus: Add SNP support for VMbus channel initiate message Date: Mon, 9 Aug 2021 13:56:11 -0400 [thread overview] Message-ID: <20210809175620.720923-8-ltykernel@gmail.com> (raw) In-Reply-To: <20210809175620.720923-1-ltykernel@gmail.com> From: Tianyu Lan <Tianyu.Lan@microsoft.com> The monitor pages in the CHANNELMSG_INITIATE_CONTACT msg are shared with host in Isolation VM and so it's necessary to use hvcall to set them visible to host. In Isolation VM with AMD SEV SNP, the access address should be in the extra space which is above shared gpa boundary. So remap these pages into the extra address(pa + shared_gpa_boundary). Introduce monitor_pages_va to store the remap address and unmap these va when disconnect vmbus. Signed-off-by: Tianyu Lan <Tianyu.Lan@microsoft.com> --- Change since v1: * Not remap monitor pages in the non-SNP isolation VM. --- drivers/hv/connection.c | 65 +++++++++++++++++++++++++++++++++++++++ drivers/hv/hyperv_vmbus.h | 1 + 2 files changed, 66 insertions(+) diff --git a/drivers/hv/connection.c b/drivers/hv/connection.c index 6d315c1465e0..bf0ac3167bd2 100644 --- a/drivers/hv/connection.c +++ b/drivers/hv/connection.c @@ -19,6 +19,7 @@ #include <linux/vmalloc.h> #include <linux/hyperv.h> #include <linux/export.h> +#include <linux/io.h> #include <asm/mshyperv.h> #include "hyperv_vmbus.h" @@ -104,6 +105,12 @@ int vmbus_negotiate_version(struct vmbus_channel_msginfo *msginfo, u32 version) msg->monitor_page1 = virt_to_phys(vmbus_connection.monitor_pages[0]); msg->monitor_page2 = virt_to_phys(vmbus_connection.monitor_pages[1]); + + if (hv_isolation_type_snp()) { + msg->monitor_page1 += ms_hyperv.shared_gpa_boundary; + msg->monitor_page2 += ms_hyperv.shared_gpa_boundary; + } + msg->target_vcpu = hv_cpu_number_to_vp_number(VMBUS_CONNECT_CPU); /* @@ -148,6 +155,31 @@ int vmbus_negotiate_version(struct vmbus_channel_msginfo *msginfo, u32 version) return -ECONNREFUSED; } + if (hv_isolation_type_snp()) { + vmbus_connection.monitor_pages_va[0] + = vmbus_connection.monitor_pages[0]; + vmbus_connection.monitor_pages[0] + = memremap(msg->monitor_page1, HV_HYP_PAGE_SIZE, + MEMREMAP_WB); + if (!vmbus_connection.monitor_pages[0]) + return -ENOMEM; + + vmbus_connection.monitor_pages_va[1] + = vmbus_connection.monitor_pages[1]; + vmbus_connection.monitor_pages[1] + = memremap(msg->monitor_page2, HV_HYP_PAGE_SIZE, + MEMREMAP_WB); + if (!vmbus_connection.monitor_pages[1]) { + memunmap(vmbus_connection.monitor_pages[0]); + return -ENOMEM; + } + + memset(vmbus_connection.monitor_pages[0], 0x00, + HV_HYP_PAGE_SIZE); + memset(vmbus_connection.monitor_pages[1], 0x00, + HV_HYP_PAGE_SIZE); + } + return ret; } @@ -159,6 +191,7 @@ int vmbus_connect(void) struct vmbus_channel_msginfo *msginfo = NULL; int i, ret = 0; __u32 version; + u64 pfn[2]; /* Initialize the vmbus connection */ vmbus_connection.conn_state = CONNECTING; @@ -216,6 +249,16 @@ int vmbus_connect(void) goto cleanup; } + if (hv_is_isolation_supported()) { + pfn[0] = virt_to_hvpfn(vmbus_connection.monitor_pages[0]); + pfn[1] = virt_to_hvpfn(vmbus_connection.monitor_pages[1]); + if (hv_mark_gpa_visibility(2, pfn, + VMBUS_PAGE_VISIBLE_READ_WRITE)) { + ret = -EFAULT; + goto cleanup; + } + } + msginfo = kzalloc(sizeof(*msginfo) + sizeof(struct vmbus_channel_initiate_contact), GFP_KERNEL); @@ -284,6 +327,8 @@ int vmbus_connect(void) void vmbus_disconnect(void) { + u64 pfn[2]; + /* * First send the unload request to the host. */ @@ -303,6 +348,26 @@ void vmbus_disconnect(void) vmbus_connection.int_page = NULL; } + if (hv_is_isolation_supported()) { + if (vmbus_connection.monitor_pages_va[0]) { + memunmap(vmbus_connection.monitor_pages[0]); + vmbus_connection.monitor_pages[0] + = vmbus_connection.monitor_pages_va[0]; + vmbus_connection.monitor_pages_va[0] = NULL; + } + + if (vmbus_connection.monitor_pages_va[1]) { + memunmap(vmbus_connection.monitor_pages[1]); + vmbus_connection.monitor_pages[1] + = vmbus_connection.monitor_pages_va[1]; + vmbus_connection.monitor_pages_va[1] = NULL; + } + + pfn[0] = virt_to_hvpfn(vmbus_connection.monitor_pages[0]); + pfn[1] = virt_to_hvpfn(vmbus_connection.monitor_pages[1]); + hv_mark_gpa_visibility(2, pfn, VMBUS_PAGE_NOT_VISIBLE); + } + hv_free_hyperv_page((unsigned long)vmbus_connection.monitor_pages[0]); hv_free_hyperv_page((unsigned long)vmbus_connection.monitor_pages[1]); vmbus_connection.monitor_pages[0] = NULL; diff --git a/drivers/hv/hyperv_vmbus.h b/drivers/hv/hyperv_vmbus.h index 42f3d9d123a1..40bc0eff6665 100644 --- a/drivers/hv/hyperv_vmbus.h +++ b/drivers/hv/hyperv_vmbus.h @@ -240,6 +240,7 @@ struct vmbus_connection { * is child->parent notification */ struct hv_monitor_page *monitor_pages[2]; + void *monitor_pages_va[2]; struct list_head chn_msg_list; spinlock_t channelmsg_lock; -- 2.25.1
WARNING: multiple messages have this Message-ID (diff)
From: Tianyu Lan <ltykernel@gmail.com> To: kys@microsoft.com, haiyangz@microsoft.com, sthemmin@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, x86@kernel.org, hpa@zytor.com, dave.hansen@linux.intel.com, luto@kernel.org, peterz@infradead.org, konrad.wilk@oracle.com, boris.ostrovsky@oracle.com, jgross@suse.com, sstabellini@kernel.org, joro@8bytes.org, will@kernel.org, davem@davemloft.net, kuba@kernel.org, jejb@linux.ibm.com, martin.petersen@oracle.com, arnd@arndb.de, hch@lst.de, m.szyprowski@samsung.com, robin.murphy@arm.com, thomas.lendacky@amd.com, brijesh.singh@amd.com, ardb@kernel.org, Tianyu.Lan@microsoft.com, pgonda@google.com, martin.b.radev@gmail.com, akpm@linux-foundation.org, kirill.shutemov@linux.intel.com, rppt@kernel.org, sfr@canb.auug.org.au, saravanand@fb.com, krish.sadhukhan@oracle.com, aneesh.kumar@linux.ibm.com, xen-devel@lists.xenproject.org, rientjes@google.com, hannes@cmpxchg.org, tj@kernel.org, michael.h.kelley@microsoft.com Cc: linux-arch@vger.kernel.org, parri.andrea@gmail.com, linux-hyperv@vger.kernel.org, linux-scsi@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, dave.hansen@intel.com, iommu@lists.linux-foundation.org, vkuznets@redhat.com Subject: [PATCH V3 07/13] HV/Vmbus: Add SNP support for VMbus channel initiate message Date: Mon, 9 Aug 2021 13:56:11 -0400 [thread overview] Message-ID: <20210809175620.720923-8-ltykernel@gmail.com> (raw) In-Reply-To: <20210809175620.720923-1-ltykernel@gmail.com> From: Tianyu Lan <Tianyu.Lan@microsoft.com> The monitor pages in the CHANNELMSG_INITIATE_CONTACT msg are shared with host in Isolation VM and so it's necessary to use hvcall to set them visible to host. In Isolation VM with AMD SEV SNP, the access address should be in the extra space which is above shared gpa boundary. So remap these pages into the extra address(pa + shared_gpa_boundary). Introduce monitor_pages_va to store the remap address and unmap these va when disconnect vmbus. Signed-off-by: Tianyu Lan <Tianyu.Lan@microsoft.com> --- Change since v1: * Not remap monitor pages in the non-SNP isolation VM. --- drivers/hv/connection.c | 65 +++++++++++++++++++++++++++++++++++++++ drivers/hv/hyperv_vmbus.h | 1 + 2 files changed, 66 insertions(+) diff --git a/drivers/hv/connection.c b/drivers/hv/connection.c index 6d315c1465e0..bf0ac3167bd2 100644 --- a/drivers/hv/connection.c +++ b/drivers/hv/connection.c @@ -19,6 +19,7 @@ #include <linux/vmalloc.h> #include <linux/hyperv.h> #include <linux/export.h> +#include <linux/io.h> #include <asm/mshyperv.h> #include "hyperv_vmbus.h" @@ -104,6 +105,12 @@ int vmbus_negotiate_version(struct vmbus_channel_msginfo *msginfo, u32 version) msg->monitor_page1 = virt_to_phys(vmbus_connection.monitor_pages[0]); msg->monitor_page2 = virt_to_phys(vmbus_connection.monitor_pages[1]); + + if (hv_isolation_type_snp()) { + msg->monitor_page1 += ms_hyperv.shared_gpa_boundary; + msg->monitor_page2 += ms_hyperv.shared_gpa_boundary; + } + msg->target_vcpu = hv_cpu_number_to_vp_number(VMBUS_CONNECT_CPU); /* @@ -148,6 +155,31 @@ int vmbus_negotiate_version(struct vmbus_channel_msginfo *msginfo, u32 version) return -ECONNREFUSED; } + if (hv_isolation_type_snp()) { + vmbus_connection.monitor_pages_va[0] + = vmbus_connection.monitor_pages[0]; + vmbus_connection.monitor_pages[0] + = memremap(msg->monitor_page1, HV_HYP_PAGE_SIZE, + MEMREMAP_WB); + if (!vmbus_connection.monitor_pages[0]) + return -ENOMEM; + + vmbus_connection.monitor_pages_va[1] + = vmbus_connection.monitor_pages[1]; + vmbus_connection.monitor_pages[1] + = memremap(msg->monitor_page2, HV_HYP_PAGE_SIZE, + MEMREMAP_WB); + if (!vmbus_connection.monitor_pages[1]) { + memunmap(vmbus_connection.monitor_pages[0]); + return -ENOMEM; + } + + memset(vmbus_connection.monitor_pages[0], 0x00, + HV_HYP_PAGE_SIZE); + memset(vmbus_connection.monitor_pages[1], 0x00, + HV_HYP_PAGE_SIZE); + } + return ret; } @@ -159,6 +191,7 @@ int vmbus_connect(void) struct vmbus_channel_msginfo *msginfo = NULL; int i, ret = 0; __u32 version; + u64 pfn[2]; /* Initialize the vmbus connection */ vmbus_connection.conn_state = CONNECTING; @@ -216,6 +249,16 @@ int vmbus_connect(void) goto cleanup; } + if (hv_is_isolation_supported()) { + pfn[0] = virt_to_hvpfn(vmbus_connection.monitor_pages[0]); + pfn[1] = virt_to_hvpfn(vmbus_connection.monitor_pages[1]); + if (hv_mark_gpa_visibility(2, pfn, + VMBUS_PAGE_VISIBLE_READ_WRITE)) { + ret = -EFAULT; + goto cleanup; + } + } + msginfo = kzalloc(sizeof(*msginfo) + sizeof(struct vmbus_channel_initiate_contact), GFP_KERNEL); @@ -284,6 +327,8 @@ int vmbus_connect(void) void vmbus_disconnect(void) { + u64 pfn[2]; + /* * First send the unload request to the host. */ @@ -303,6 +348,26 @@ void vmbus_disconnect(void) vmbus_connection.int_page = NULL; } + if (hv_is_isolation_supported()) { + if (vmbus_connection.monitor_pages_va[0]) { + memunmap(vmbus_connection.monitor_pages[0]); + vmbus_connection.monitor_pages[0] + = vmbus_connection.monitor_pages_va[0]; + vmbus_connection.monitor_pages_va[0] = NULL; + } + + if (vmbus_connection.monitor_pages_va[1]) { + memunmap(vmbus_connection.monitor_pages[1]); + vmbus_connection.monitor_pages[1] + = vmbus_connection.monitor_pages_va[1]; + vmbus_connection.monitor_pages_va[1] = NULL; + } + + pfn[0] = virt_to_hvpfn(vmbus_connection.monitor_pages[0]); + pfn[1] = virt_to_hvpfn(vmbus_connection.monitor_pages[1]); + hv_mark_gpa_visibility(2, pfn, VMBUS_PAGE_NOT_VISIBLE); + } + hv_free_hyperv_page((unsigned long)vmbus_connection.monitor_pages[0]); hv_free_hyperv_page((unsigned long)vmbus_connection.monitor_pages[1]); vmbus_connection.monitor_pages[0] = NULL; diff --git a/drivers/hv/hyperv_vmbus.h b/drivers/hv/hyperv_vmbus.h index 42f3d9d123a1..40bc0eff6665 100644 --- a/drivers/hv/hyperv_vmbus.h +++ b/drivers/hv/hyperv_vmbus.h @@ -240,6 +240,7 @@ struct vmbus_connection { * is child->parent notification */ struct hv_monitor_page *monitor_pages[2]; + void *monitor_pages_va[2]; struct list_head chn_msg_list; spinlock_t channelmsg_lock; -- 2.25.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
next prev parent reply other threads:[~2021-08-09 17:56 UTC|newest] Thread overview: 128+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-08-09 17:56 [PATCH V3 00/13] x86/Hyper-V: Add Hyper-V Isolation VM support Tianyu Lan 2021-08-09 17:56 ` Tianyu Lan 2021-08-09 17:56 ` [PATCH V3 01/13] x86/HV: Initialize GHCB page in Isolation VM Tianyu Lan 2021-08-09 17:56 ` Tianyu Lan 2021-08-10 10:56 ` Wei Liu 2021-08-10 10:56 ` Wei Liu 2021-08-10 12:17 ` Tianyu Lan 2021-08-10 12:17 ` Tianyu Lan 2021-08-12 19:14 ` Michael Kelley 2021-08-12 19:14 ` Michael Kelley via iommu 2021-08-13 15:46 ` Tianyu Lan 2021-08-13 15:46 ` Tianyu Lan 2021-08-09 17:56 ` [PATCH V3 02/13] x86/HV: Initialize shared memory boundary in the " Tianyu Lan 2021-08-09 17:56 ` Tianyu Lan 2021-08-12 19:18 ` Michael Kelley 2021-08-12 19:18 ` Michael Kelley via iommu 2021-08-14 13:32 ` Tianyu Lan 2021-08-14 13:32 ` Tianyu Lan 2021-08-09 17:56 ` [PATCH V3 03/13] x86/HV: Add new hvcall guest address host visibility support Tianyu Lan 2021-08-09 17:56 ` Tianyu Lan 2021-08-09 22:12 ` Dave Hansen 2021-08-09 22:12 ` Dave Hansen 2021-08-10 13:09 ` Tianyu Lan 2021-08-10 13:09 ` Tianyu Lan 2021-08-10 11:03 ` Wei Liu 2021-08-10 11:03 ` Wei Liu 2021-08-10 12:25 ` Tianyu Lan 2021-08-10 12:25 ` Tianyu Lan 2021-08-12 19:36 ` Michael Kelley 2021-08-12 19:36 ` Michael Kelley via iommu 2021-08-12 21:10 ` Michael Kelley 2021-08-12 21:10 ` Michael Kelley via iommu 2021-08-09 17:56 ` [PATCH V3 04/13] HV: Mark vmbus ring buffer visible to host in Isolation VM Tianyu Lan 2021-08-09 17:56 ` Tianyu Lan 2021-08-12 22:20 ` Michael Kelley 2021-08-12 22:20 ` Michael Kelley via iommu 2021-08-15 15:21 ` Tianyu Lan 2021-08-15 15:21 ` Tianyu Lan 2021-08-09 17:56 ` [PATCH V3 05/13] HV: Add Write/Read MSR registers via ghcb page Tianyu Lan 2021-08-09 17:56 ` Tianyu Lan 2021-08-13 19:31 ` Michael Kelley 2021-08-13 19:31 ` Michael Kelley via iommu 2021-08-13 20:26 ` Michael Kelley 2021-08-13 20:26 ` Michael Kelley via iommu 2021-08-24 8:45 ` Christoph Hellwig 2021-08-24 8:45 ` Christoph Hellwig 2021-08-09 17:56 ` [PATCH V3 06/13] HV: Add ghcb hvcall support for SNP VM Tianyu Lan 2021-08-09 17:56 ` Tianyu Lan 2021-08-13 20:42 ` Michael Kelley 2021-08-13 20:42 ` Michael Kelley via iommu 2021-08-09 17:56 ` Tianyu Lan [this message] 2021-08-09 17:56 ` [PATCH V3 07/13] HV/Vmbus: Add SNP support for VMbus channel initiate message Tianyu Lan 2021-08-13 21:28 ` Michael Kelley 2021-08-13 21:28 ` Michael Kelley via iommu 2021-08-09 17:56 ` [PATCH V3 08/13] HV/Vmbus: Initialize VMbus ring buffer for Isolation VM Tianyu Lan 2021-08-09 17:56 ` Tianyu Lan 2021-08-16 17:28 ` Michael Kelley 2021-08-16 17:28 ` Michael Kelley via iommu 2021-08-17 15:36 ` Tianyu Lan 2021-08-17 15:36 ` Tianyu Lan 2021-08-09 17:56 ` [PATCH V3 09/13] DMA: Add dma_map_decrypted/dma_unmap_encrypted() function Tianyu Lan 2021-08-09 17:56 ` Tianyu Lan 2021-08-12 12:26 ` Christoph Hellwig 2021-08-12 12:26 ` Christoph Hellwig 2021-08-12 15:38 ` Tianyu Lan 2021-08-12 15:38 ` Tianyu Lan 2021-08-09 17:56 ` [PATCH V3 10/13] x86/Swiotlb: Add Swiotlb bounce buffer remap function for HV IVM Tianyu Lan 2021-08-09 17:56 ` Tianyu Lan 2021-08-12 12:27 ` Christoph Hellwig 2021-08-12 12:27 ` Christoph Hellwig 2021-08-13 17:58 ` Tianyu Lan 2021-08-13 17:58 ` Tianyu Lan 2021-08-16 14:50 ` Tianyu Lan 2021-08-16 14:50 ` Tianyu Lan 2021-08-19 8:49 ` Christoph Hellwig 2021-08-19 8:49 ` Christoph Hellwig 2021-08-19 9:59 ` Tianyu Lan 2021-08-19 9:59 ` Tianyu Lan 2021-08-19 10:02 ` Christoph Hellwig 2021-08-19 10:02 ` Christoph Hellwig 2021-08-19 10:03 ` Tianyu Lan 2021-08-19 10:03 ` Tianyu Lan 2021-08-09 17:56 ` [PATCH V3 11/13] HV/IOMMU: Enable swiotlb bounce buffer for Isolation VM Tianyu Lan 2021-08-09 17:56 ` Tianyu Lan 2021-08-19 18:11 ` Michael Kelley 2021-08-19 18:11 ` Michael Kelley via iommu 2021-08-20 4:13 ` hch 2021-08-20 4:13 ` hch 2021-08-20 9:32 ` Tianyu Lan 2021-08-20 9:32 ` Tianyu Lan 2021-08-09 17:56 ` [PATCH V3 12/13] HV/Netvsc: Add Isolation VM support for netvsc driver Tianyu Lan 2021-08-09 17:56 ` Tianyu Lan 2021-08-19 18:14 ` Michael Kelley 2021-08-19 18:14 ` Michael Kelley via iommu 2021-08-20 4:21 ` hch 2021-08-20 4:21 ` hch 2021-08-20 13:11 ` Tianyu Lan 2021-08-20 13:11 ` Tianyu Lan 2021-08-20 13:30 ` Tom Lendacky 2021-08-20 13:30 ` Tom Lendacky via iommu 2021-08-20 18:20 ` Tianyu Lan 2021-08-20 18:20 ` Tianyu Lan 2021-08-09 17:56 ` [PATCH V3 13/13] HV/Storvsc: Add Isolation VM support for storvsc driver Tianyu Lan 2021-08-09 17:56 ` Tianyu Lan 2021-08-19 18:17 ` Michael Kelley 2021-08-19 18:17 ` Michael Kelley via iommu 2021-08-20 4:32 ` hch 2021-08-20 4:32 ` hch 2021-08-20 15:40 ` Michael Kelley 2021-08-20 15:40 ` Michael Kelley via iommu 2021-08-24 8:49 ` min_align_mask " hch 2021-08-24 8:49 ` hch 2021-08-20 16:01 ` Tianyu Lan 2021-08-20 16:01 ` Tianyu Lan 2021-08-20 15:20 ` Tianyu Lan 2021-08-20 15:20 ` Tianyu Lan 2021-08-20 15:37 ` Tianyu Lan 2021-08-20 15:37 ` Tianyu Lan 2021-08-20 16:08 ` Michael Kelley via iommu 2021-08-20 16:08 ` Michael Kelley 2021-08-20 18:04 ` Tianyu Lan 2021-08-20 18:04 ` Tianyu Lan 2021-08-20 19:22 ` Michael Kelley 2021-08-20 19:22 ` Michael Kelley via iommu 2021-08-24 8:46 ` hch 2021-08-24 8:46 ` hch 2021-08-16 14:55 ` [PATCH V3 00/13] x86/Hyper-V: Add Hyper-V Isolation VM support Michael Kelley 2021-08-16 14:55 ` Michael Kelley via iommu
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