From: Tianyu Lan <ltykernel@gmail.com> To: kys@microsoft.com, haiyangz@microsoft.com, sthemmin@microsoft.com, wei.liu@kernel.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, x86@kernel.org, hpa@zytor.com, arnd@arndb.de, akpm@linux-foundation.org, gregkh@linuxfoundation.org, konrad.wilk@oracle.com, hch@lst.de, m.szyprowski@samsung.com, robin.murphy@arm.com, joro@8bytes.org, will@kernel.org, davem@davemloft.net, kuba@kernel.org, jejb@linux.ibm.com, martin.petersen@oracle.com Cc: Tianyu Lan <Tianyu.Lan@microsoft.com>, iommu@lists.linux-foundation.org, linux-arch@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-scsi@vger.kernel.org, netdev@vger.kernel.org, vkuznets@redhat.com, thomas.lendacky@amd.com, brijesh.singh@amd.com, sunilmut@microsoft.com Subject: [Resend RFC PATCH V2 05/12] HV: Add ghcb hvcall support for SNP VM Date: Wed, 14 Apr 2021 10:49:38 -0400 [thread overview] Message-ID: <20210414144945.3460554-6-ltykernel@gmail.com> (raw) In-Reply-To: <20210414144945.3460554-1-ltykernel@gmail.com> From: Tianyu Lan <Tianyu.Lan@microsoft.com> Hyper-V provides ghcb hvcall to handle VMBus HVCALL_SIGNAL_EVENT and HVCALL_POST_MESSAGE msg in SNP Isolation VM. Add such support. Signed-off-by: Tianyu Lan <Tianyu.Lan@microsoft.com> --- arch/x86/hyperv/ivm.c | 69 +++++++++++++++++++++++++++++++++ arch/x86/include/asm/mshyperv.h | 1 + drivers/hv/connection.c | 6 ++- drivers/hv/hv.c | 8 +++- 4 files changed, 82 insertions(+), 2 deletions(-) diff --git a/arch/x86/hyperv/ivm.c b/arch/x86/hyperv/ivm.c index 2ec64b367aaf..0ad73ea60c8f 100644 --- a/arch/x86/hyperv/ivm.c +++ b/arch/x86/hyperv/ivm.c @@ -18,8 +18,77 @@ union hv_ghcb { struct ghcb ghcb; + struct { + u64 hypercalldata[509]; + u64 outputgpa; + union { + union { + struct { + u32 callcode : 16; + u32 isfast : 1; + u32 reserved1 : 14; + u32 isnested : 1; + u32 countofelements : 12; + u32 reserved2 : 4; + u32 repstartindex : 12; + u32 reserved3 : 4; + }; + u64 asuint64; + } hypercallinput; + union { + struct { + u16 callstatus; + u16 reserved1; + u32 elementsprocessed : 12; + u32 reserved2 : 20; + }; + u64 asunit64; + } hypercalloutput; + }; + u64 reserved2; + } hypercall; } __packed __aligned(PAGE_SIZE); +u64 hv_ghcb_hypercall(u64 control, void *input, void *output, u32 input_size) +{ + union hv_ghcb *hv_ghcb; + void **ghcb_base; + unsigned long flags; + + if (!ms_hyperv.ghcb_base) + return -EFAULT; + + local_irq_save(flags); + ghcb_base = (void **)this_cpu_ptr(ms_hyperv.ghcb_base); + hv_ghcb = (union hv_ghcb *)*ghcb_base; + if (!hv_ghcb) { + local_irq_restore(flags); + return -EFAULT; + } + + memset(hv_ghcb, 0x00, HV_HYP_PAGE_SIZE); + hv_ghcb->ghcb.protocol_version = 1; + hv_ghcb->ghcb.ghcb_usage = 1; + + hv_ghcb->hypercall.outputgpa = (u64)output; + hv_ghcb->hypercall.hypercallinput.asuint64 = 0; + hv_ghcb->hypercall.hypercallinput.callcode = control; + + if (input_size) + memcpy(hv_ghcb->hypercall.hypercalldata, input, input_size); + + VMGEXIT(); + + hv_ghcb->ghcb.ghcb_usage = 0xffffffff; + memset(hv_ghcb->ghcb.save.valid_bitmap, 0, + sizeof(hv_ghcb->ghcb.save.valid_bitmap)); + + local_irq_restore(flags); + + return hv_ghcb->hypercall.hypercalloutput.callstatus; +} +EXPORT_SYMBOL_GPL(hv_ghcb_hypercall); + void hv_ghcb_msr_write(u64 msr, u64 value) { union hv_ghcb *hv_ghcb; diff --git a/arch/x86/include/asm/mshyperv.h b/arch/x86/include/asm/mshyperv.h index 73501dbbc240..929504fe8654 100644 --- a/arch/x86/include/asm/mshyperv.h +++ b/arch/x86/include/asm/mshyperv.h @@ -318,6 +318,7 @@ void hv_sint_rdmsrl_ghcb(u64 msr, u64 *value); void hv_signal_eom_ghcb(void); void hv_ghcb_msr_write(u64 msr, u64 value); void hv_ghcb_msr_read(u64 msr, u64 *value); +u64 hv_ghcb_hypercall(u64 control, void *input, void *output, u32 input_size); #define hv_get_synint_state_ghcb(int_num, val) \ hv_sint_rdmsrl_ghcb(HV_X64_MSR_SINT0 + int_num, val) diff --git a/drivers/hv/connection.c b/drivers/hv/connection.c index c83612cddb99..79bca653dce9 100644 --- a/drivers/hv/connection.c +++ b/drivers/hv/connection.c @@ -442,6 +442,10 @@ void vmbus_set_event(struct vmbus_channel *channel) ++channel->sig_events; - hv_do_fast_hypercall8(HVCALL_SIGNAL_EVENT, channel->sig_event); + if (hv_isolation_type_snp()) + hv_ghcb_hypercall(HVCALL_SIGNAL_EVENT, &channel->sig_event, + NULL, sizeof(u64)); + else + hv_do_fast_hypercall8(HVCALL_SIGNAL_EVENT, channel->sig_event); } EXPORT_SYMBOL_GPL(vmbus_set_event); diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c index 069530eeb7c6..bff7c9049ffb 100644 --- a/drivers/hv/hv.c +++ b/drivers/hv/hv.c @@ -60,7 +60,13 @@ int hv_post_message(union hv_connection_id connection_id, aligned_msg->payload_size = payload_size; memcpy((void *)aligned_msg->payload, payload, payload_size); - status = hv_do_hypercall(HVCALL_POST_MESSAGE, aligned_msg, NULL); + if (hv_isolation_type_snp()) + status = hv_ghcb_hypercall(HVCALL_POST_MESSAGE, + (void *)aligned_msg, NULL, + sizeof(struct hv_input_post_message)); + else + status = hv_do_hypercall(HVCALL_POST_MESSAGE, + aligned_msg, NULL); /* Preemption must remain disabled until after the hypercall * so some other thread can't get scheduled onto this cpu and -- 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, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, x86@kernel.org, hpa@zytor.com, arnd@arndb.de, akpm@linux-foundation.org, gregkh@linuxfoundation.org, konrad.wilk@oracle.com, hch@lst.de, m.szyprowski@samsung.com, robin.murphy@arm.com, joro@8bytes.org, will@kernel.org, davem@davemloft.net, kuba@kernel.org, jejb@linux.ibm.com, martin.petersen@oracle.com Cc: linux-arch@vger.kernel.org, thomas.lendacky@amd.com, linux-hyperv@vger.kernel.org, Tianyu Lan <Tianyu.Lan@microsoft.com>, linux-scsi@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, iommu@lists.linux-foundation.org, brijesh.singh@amd.com, vkuznets@redhat.com, sunilmut@microsoft.com Subject: [Resend RFC PATCH V2 05/12] HV: Add ghcb hvcall support for SNP VM Date: Wed, 14 Apr 2021 10:49:38 -0400 [thread overview] Message-ID: <20210414144945.3460554-6-ltykernel@gmail.com> (raw) In-Reply-To: <20210414144945.3460554-1-ltykernel@gmail.com> From: Tianyu Lan <Tianyu.Lan@microsoft.com> Hyper-V provides ghcb hvcall to handle VMBus HVCALL_SIGNAL_EVENT and HVCALL_POST_MESSAGE msg in SNP Isolation VM. Add such support. Signed-off-by: Tianyu Lan <Tianyu.Lan@microsoft.com> --- arch/x86/hyperv/ivm.c | 69 +++++++++++++++++++++++++++++++++ arch/x86/include/asm/mshyperv.h | 1 + drivers/hv/connection.c | 6 ++- drivers/hv/hv.c | 8 +++- 4 files changed, 82 insertions(+), 2 deletions(-) diff --git a/arch/x86/hyperv/ivm.c b/arch/x86/hyperv/ivm.c index 2ec64b367aaf..0ad73ea60c8f 100644 --- a/arch/x86/hyperv/ivm.c +++ b/arch/x86/hyperv/ivm.c @@ -18,8 +18,77 @@ union hv_ghcb { struct ghcb ghcb; + struct { + u64 hypercalldata[509]; + u64 outputgpa; + union { + union { + struct { + u32 callcode : 16; + u32 isfast : 1; + u32 reserved1 : 14; + u32 isnested : 1; + u32 countofelements : 12; + u32 reserved2 : 4; + u32 repstartindex : 12; + u32 reserved3 : 4; + }; + u64 asuint64; + } hypercallinput; + union { + struct { + u16 callstatus; + u16 reserved1; + u32 elementsprocessed : 12; + u32 reserved2 : 20; + }; + u64 asunit64; + } hypercalloutput; + }; + u64 reserved2; + } hypercall; } __packed __aligned(PAGE_SIZE); +u64 hv_ghcb_hypercall(u64 control, void *input, void *output, u32 input_size) +{ + union hv_ghcb *hv_ghcb; + void **ghcb_base; + unsigned long flags; + + if (!ms_hyperv.ghcb_base) + return -EFAULT; + + local_irq_save(flags); + ghcb_base = (void **)this_cpu_ptr(ms_hyperv.ghcb_base); + hv_ghcb = (union hv_ghcb *)*ghcb_base; + if (!hv_ghcb) { + local_irq_restore(flags); + return -EFAULT; + } + + memset(hv_ghcb, 0x00, HV_HYP_PAGE_SIZE); + hv_ghcb->ghcb.protocol_version = 1; + hv_ghcb->ghcb.ghcb_usage = 1; + + hv_ghcb->hypercall.outputgpa = (u64)output; + hv_ghcb->hypercall.hypercallinput.asuint64 = 0; + hv_ghcb->hypercall.hypercallinput.callcode = control; + + if (input_size) + memcpy(hv_ghcb->hypercall.hypercalldata, input, input_size); + + VMGEXIT(); + + hv_ghcb->ghcb.ghcb_usage = 0xffffffff; + memset(hv_ghcb->ghcb.save.valid_bitmap, 0, + sizeof(hv_ghcb->ghcb.save.valid_bitmap)); + + local_irq_restore(flags); + + return hv_ghcb->hypercall.hypercalloutput.callstatus; +} +EXPORT_SYMBOL_GPL(hv_ghcb_hypercall); + void hv_ghcb_msr_write(u64 msr, u64 value) { union hv_ghcb *hv_ghcb; diff --git a/arch/x86/include/asm/mshyperv.h b/arch/x86/include/asm/mshyperv.h index 73501dbbc240..929504fe8654 100644 --- a/arch/x86/include/asm/mshyperv.h +++ b/arch/x86/include/asm/mshyperv.h @@ -318,6 +318,7 @@ void hv_sint_rdmsrl_ghcb(u64 msr, u64 *value); void hv_signal_eom_ghcb(void); void hv_ghcb_msr_write(u64 msr, u64 value); void hv_ghcb_msr_read(u64 msr, u64 *value); +u64 hv_ghcb_hypercall(u64 control, void *input, void *output, u32 input_size); #define hv_get_synint_state_ghcb(int_num, val) \ hv_sint_rdmsrl_ghcb(HV_X64_MSR_SINT0 + int_num, val) diff --git a/drivers/hv/connection.c b/drivers/hv/connection.c index c83612cddb99..79bca653dce9 100644 --- a/drivers/hv/connection.c +++ b/drivers/hv/connection.c @@ -442,6 +442,10 @@ void vmbus_set_event(struct vmbus_channel *channel) ++channel->sig_events; - hv_do_fast_hypercall8(HVCALL_SIGNAL_EVENT, channel->sig_event); + if (hv_isolation_type_snp()) + hv_ghcb_hypercall(HVCALL_SIGNAL_EVENT, &channel->sig_event, + NULL, sizeof(u64)); + else + hv_do_fast_hypercall8(HVCALL_SIGNAL_EVENT, channel->sig_event); } EXPORT_SYMBOL_GPL(vmbus_set_event); diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c index 069530eeb7c6..bff7c9049ffb 100644 --- a/drivers/hv/hv.c +++ b/drivers/hv/hv.c @@ -60,7 +60,13 @@ int hv_post_message(union hv_connection_id connection_id, aligned_msg->payload_size = payload_size; memcpy((void *)aligned_msg->payload, payload, payload_size); - status = hv_do_hypercall(HVCALL_POST_MESSAGE, aligned_msg, NULL); + if (hv_isolation_type_snp()) + status = hv_ghcb_hypercall(HVCALL_POST_MESSAGE, + (void *)aligned_msg, NULL, + sizeof(struct hv_input_post_message)); + else + status = hv_do_hypercall(HVCALL_POST_MESSAGE, + aligned_msg, NULL); /* Preemption must remain disabled until after the hypercall * so some other thread can't get scheduled onto this cpu and -- 2.25.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
next prev parent reply other threads:[~2021-04-14 14:51 UTC|newest] Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-04-14 14:49 [Resend RFC PATCH V2 00/12] x86/Hyper-V: Add Hyper-V Isolation VM support Tianyu Lan 2021-04-14 14:49 ` Tianyu Lan 2021-04-14 14:49 ` [Resend RFC PATCH V2 01/12] x86/HV: Initialize GHCB page in Isolation VM Tianyu Lan 2021-04-14 14:49 ` Tianyu Lan 2021-04-14 14:49 ` [Resend RFC PATCH V2 02/12] x86/HV: Initialize shared memory boundary " Tianyu Lan 2021-04-14 14:49 ` Tianyu Lan 2021-04-14 14:49 ` [Resend RFC PATCH V2 03/12] x86/Hyper-V: Add new hvcall guest address host visibility support Tianyu Lan 2021-04-14 14:49 ` Tianyu Lan 2021-04-14 15:40 ` Christoph Hellwig 2021-04-14 15:40 ` Christoph Hellwig 2021-04-15 8:13 ` Tianyu Lan 2021-04-15 8:13 ` Tianyu Lan 2021-04-14 14:49 ` [Resend RFC PATCH V2 04/12] HV: Add Write/Read MSR registers via ghcb Tianyu Lan 2021-04-14 14:49 ` Tianyu Lan 2021-04-14 15:41 ` Christoph Hellwig 2021-04-14 15:41 ` Christoph Hellwig 2021-04-15 8:19 ` Tianyu Lan 2021-04-15 8:19 ` Tianyu Lan 2021-04-15 18:11 ` Konrad Rzeszutek Wilk 2021-04-15 18:11 ` Konrad Rzeszutek Wilk 2021-04-14 14:49 ` Tianyu Lan [this message] 2021-04-14 14:49 ` [Resend RFC PATCH V2 05/12] HV: Add ghcb hvcall support for SNP VM Tianyu Lan 2021-04-14 14:49 ` [Resend RFC PATCH V2 06/12] HV/Vmbus: Add SNP support for VMbus channel initiate message Tianyu Lan 2021-04-14 14:49 ` Tianyu Lan 2021-04-15 18:52 ` Konrad Rzeszutek Wilk 2021-04-15 18:52 ` Konrad Rzeszutek Wilk 2021-04-14 14:49 ` [Resend RFC PATCH V2 07/12] HV/Vmbus: Initialize VMbus ring buffer for Isolation VM Tianyu Lan 2021-04-14 14:49 ` Tianyu Lan 2021-04-15 20:24 ` Konrad Rzeszutek Wilk 2021-04-15 20:24 ` Konrad Rzeszutek Wilk 2021-04-19 6:36 ` Christoph Hellwig 2021-04-19 6:36 ` Christoph Hellwig 2021-04-14 14:49 ` [Resend RFC PATCH V2 08/12] UIO/Hyper-V: Not load UIO HV driver in the isolation VM Tianyu Lan 2021-04-14 14:49 ` Tianyu Lan 2021-04-14 15:42 ` Christoph Hellwig 2021-04-14 15:42 ` Christoph Hellwig 2021-04-14 15:45 ` Greg KH 2021-04-14 15:45 ` Greg KH 2021-04-14 16:17 ` Stephen Hemminger 2021-04-14 16:17 ` Stephen Hemminger 2021-04-15 12:54 ` Tianyu Lan 2021-04-15 12:54 ` Tianyu Lan 2021-04-15 13:09 ` Tianyu Lan 2021-04-15 13:09 ` Tianyu Lan 2021-04-14 14:49 ` [Resend RFC PATCH V2 09/12] swiotlb: Add bounce buffer remap address setting function Tianyu Lan 2021-04-14 14:49 ` Tianyu Lan 2021-04-15 20:28 ` Konrad Rzeszutek Wilk 2021-04-15 20:28 ` Konrad Rzeszutek Wilk 2021-04-14 14:49 ` [Resend RFC PATCH V2 10/12] HV/IOMMU: Add Hyper-V dma ops support Tianyu Lan 2021-04-14 14:49 ` Tianyu Lan 2021-04-14 15:47 ` Christoph Hellwig 2021-04-14 15:47 ` Christoph Hellwig 2021-05-12 16:01 ` Tianyu Lan 2021-05-12 16:01 ` Tianyu Lan 2021-05-12 17:29 ` Robin Murphy 2021-05-12 17:29 ` Robin Murphy 2021-05-13 3:19 ` Lu Baolu 2021-05-13 3:19 ` Lu Baolu 2021-04-14 14:49 ` [Resend RFC PATCH V2 11/12] HV/Netvsc: Add Isolation VM support for netvsc driver Tianyu Lan 2021-04-14 14:49 ` Tianyu Lan 2021-04-14 15:50 ` Christoph Hellwig 2021-04-14 15:50 ` Christoph Hellwig 2021-04-15 8:39 ` Tianyu Lan 2021-04-15 8:39 ` Tianyu Lan 2021-04-14 14:49 ` [Resend RFC PATCH V2 12/12] HV/Storvsc: Add Isolation VM support for storvsc driver Tianyu Lan 2021-04-14 14:49 ` Tianyu Lan 2021-04-14 15:51 ` Christoph Hellwig 2021-04-14 15:51 ` Christoph Hellwig
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