Staging: hv: Remove xen legacy code and check for Hyper-V
Removed legacy XEN layer from hypervisor setup, and made sure only Hyper-V is Is a valid hypervisor to run on. Signed-off-by: Hank Janssen <hjanssen@microsoft.com> Cc: Haiyang Zhang <haiyangz@microsoft.com>. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Hank Janssen
Greg Kroah-Hartman
parent
4f28900bcf
commit
a73e6b7c50
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@ -208,50 +208,51 @@ int HvInit(void)
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/* HvQueryHypervisorFeatures(maxLeaf); */
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/*
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* Determine if we are running on xenlinux (ie x2v shim) or native
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* linux
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* We only support running on top of Hyper-V
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*/
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rdmsrl(HV_X64_MSR_GUEST_OS_ID, gHvContext.GuestId);
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if (gHvContext.GuestId == 0) {
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/* Write our OS info */
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wrmsrl(HV_X64_MSR_GUEST_OS_ID, HV_LINUX_GUEST_ID);
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gHvContext.GuestId = HV_LINUX_GUEST_ID;
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}
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/* See if the hypercall page is already set */
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rdmsrl(HV_X64_MSR_HYPERCALL, hypercallMsr.AsUINT64);
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if (gHvContext.GuestId == HV_LINUX_GUEST_ID) {
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/* Allocate the hypercall page memory */
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/* virtAddr = osd_PageAlloc(1); */
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virtAddr = osd_VirtualAllocExec(PAGE_SIZE);
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if (!virtAddr) {
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DPRINT_ERR(VMBUS,
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"unable to allocate hypercall page!!");
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goto Cleanup;
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}
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hypercallMsr.Enable = 1;
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/* hypercallMsr.GuestPhysicalAddress =
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* virt_to_phys(virtAddr) >> PAGE_SHIFT; */
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hypercallMsr.GuestPhysicalAddress = vmalloc_to_pfn(virtAddr);
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wrmsrl(HV_X64_MSR_HYPERCALL, hypercallMsr.AsUINT64);
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/* Confirm that hypercall page did get setup. */
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hypercallMsr.AsUINT64 = 0;
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rdmsrl(HV_X64_MSR_HYPERCALL, hypercallMsr.AsUINT64);
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if (!hypercallMsr.Enable) {
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DPRINT_ERR(VMBUS, "unable to set hypercall page!!");
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goto Cleanup;
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}
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gHvContext.HypercallPage = virtAddr;
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} else {
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if (gHvContext.GuestId != 0) {
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DPRINT_ERR(VMBUS, "Unknown guest id (0x%llx)!!",
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gHvContext.GuestId);
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goto Cleanup;
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}
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/* Write our OS info */
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wrmsrl(HV_X64_MSR_GUEST_OS_ID, HV_LINUX_GUEST_ID);
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gHvContext.GuestId = HV_LINUX_GUEST_ID;
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/* See if the hypercall page is already set */
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rdmsrl(HV_X64_MSR_HYPERCALL, hypercallMsr.AsUINT64);
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/*
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* Allocate the hypercall page memory
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* virtAddr = osd_PageAlloc(1);
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*/
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virtAddr = osd_VirtualAllocExec(PAGE_SIZE);
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if (!virtAddr) {
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DPRINT_ERR(VMBUS,
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"unable to allocate hypercall page!!");
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goto Cleanup;
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}
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hypercallMsr.Enable = 1;
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hypercallMsr.GuestPhysicalAddress = vmalloc_to_pfn(virtAddr);
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wrmsrl(HV_X64_MSR_HYPERCALL, hypercallMsr.AsUINT64);
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/* Confirm that hypercall page did get setup. */
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hypercallMsr.AsUINT64 = 0;
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rdmsrl(HV_X64_MSR_HYPERCALL, hypercallMsr.AsUINT64);
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if (!hypercallMsr.Enable) {
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DPRINT_ERR(VMBUS, "unable to set hypercall page!!");
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goto Cleanup;
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}
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gHvContext.HypercallPage = virtAddr;
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DPRINT_INFO(VMBUS, "Hypercall page VA=%p, PA=0x%0llx",
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gHvContext.HypercallPage,
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(u64)hypercallMsr.GuestPhysicalAddress << PAGE_SHIFT);
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@ -273,8 +274,6 @@ int HvInit(void)
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gHvContext.SignalEventParam->FlagNumber = 0;
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gHvContext.SignalEventParam->RsvdZ = 0;
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/* DPRINT_DBG(VMBUS, "My id %llu", HvGetCurrentPartitionId()); */
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DPRINT_EXIT(VMBUS);
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return ret;
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@ -311,17 +310,14 @@ void HvCleanup(void)
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kfree(gHvContext.SignalEventBuffer);
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}
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if (gHvContext.GuestId == HV_LINUX_GUEST_ID) {
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if (gHvContext.HypercallPage) {
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hypercallMsr.AsUINT64 = 0;
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wrmsrl(HV_X64_MSR_HYPERCALL, hypercallMsr.AsUINT64);
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vfree(gHvContext.HypercallPage);
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gHvContext.HypercallPage = NULL;
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}
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if (gHvContext.HypercallPage) {
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hypercallMsr.AsUINT64 = 0;
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wrmsrl(HV_X64_MSR_HYPERCALL, hypercallMsr.AsUINT64);
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vfree(gHvContext.HypercallPage);
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gHvContext.HypercallPage = NULL;
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}
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DPRINT_EXIT(VMBUS);
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}
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/**
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@ -393,7 +389,7 @@ void HvSynicInit(void *irqarg)
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union hv_synic_siefp siefp;
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union hv_synic_sint sharedSint;
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union hv_synic_scontrol sctrl;
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u64 guestID;
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u32 irqVector = *((u32 *)(irqarg));
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int cpu = smp_processor_id();
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@ -409,72 +405,42 @@ void HvSynicInit(void *irqarg)
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DPRINT_INFO(VMBUS, "SynIC version: %llx", version);
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/* TODO: Handle SMP */
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if (gHvContext.GuestId == HV_XENLINUX_GUEST_ID) {
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DPRINT_INFO(VMBUS, "Skipping SIMP and SIEFP setup since "
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"it is already set.");
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gHvContext.synICMessagePage[cpu] = (void *)get_zeroed_page(GFP_ATOMIC);
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rdmsrl(HV_X64_MSR_SIMP, simp.AsUINT64);
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rdmsrl(HV_X64_MSR_SIEFP, siefp.AsUINT64);
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DPRINT_DBG(VMBUS, "Simp: %llx, Sifep: %llx",
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simp.AsUINT64, siefp.AsUINT64);
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/*
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* Determine if we are running on xenlinux (ie x2v shim) or
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* native linux
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*/
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rdmsrl(HV_X64_MSR_GUEST_OS_ID, guestID);
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if (guestID == HV_LINUX_GUEST_ID) {
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gHvContext.synICMessagePage[cpu] =
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phys_to_virt(simp.BaseSimpGpa << PAGE_SHIFT);
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gHvContext.synICEventPage[cpu] =
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phys_to_virt(siefp.BaseSiefpGpa << PAGE_SHIFT);
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} else {
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DPRINT_ERR(VMBUS, "unknown guest id!!");
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goto Cleanup;
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}
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DPRINT_DBG(VMBUS, "MAPPED: Simp: %p, Sifep: %p",
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gHvContext.synICMessagePage[cpu],
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gHvContext.synICEventPage[cpu]);
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} else {
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gHvContext.synICMessagePage[cpu] = (void *)get_zeroed_page(GFP_ATOMIC);
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if (gHvContext.synICMessagePage[cpu] == NULL) {
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DPRINT_ERR(VMBUS,
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"unable to allocate SYNIC message page!!");
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goto Cleanup;
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}
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gHvContext.synICEventPage[cpu] = (void *)get_zeroed_page(GFP_ATOMIC);
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if (gHvContext.synICEventPage[cpu] == NULL) {
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DPRINT_ERR(VMBUS,
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"unable to allocate SYNIC event page!!");
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goto Cleanup;
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}
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/* Setup the Synic's message page */
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rdmsrl(HV_X64_MSR_SIMP, simp.AsUINT64);
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simp.SimpEnabled = 1;
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simp.BaseSimpGpa = virt_to_phys(gHvContext.synICMessagePage[cpu])
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>> PAGE_SHIFT;
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DPRINT_DBG(VMBUS, "HV_X64_MSR_SIMP msr set to: %llx",
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simp.AsUINT64);
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wrmsrl(HV_X64_MSR_SIMP, simp.AsUINT64);
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/* Setup the Synic's event page */
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rdmsrl(HV_X64_MSR_SIEFP, siefp.AsUINT64);
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siefp.SiefpEnabled = 1;
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siefp.BaseSiefpGpa = virt_to_phys(gHvContext.synICEventPage[cpu])
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>> PAGE_SHIFT;
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DPRINT_DBG(VMBUS, "HV_X64_MSR_SIEFP msr set to: %llx",
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siefp.AsUINT64);
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wrmsrl(HV_X64_MSR_SIEFP, siefp.AsUINT64);
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if (gHvContext.synICMessagePage[cpu] == NULL) {
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DPRINT_ERR(VMBUS,
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"unable to allocate SYNIC message page!!");
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goto Cleanup;
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}
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gHvContext.synICEventPage[cpu] = (void *)get_zeroed_page(GFP_ATOMIC);
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if (gHvContext.synICEventPage[cpu] == NULL) {
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DPRINT_ERR(VMBUS,
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"unable to allocate SYNIC event page!!");
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goto Cleanup;
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}
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/* Setup the Synic's message page */
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rdmsrl(HV_X64_MSR_SIMP, simp.AsUINT64);
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simp.SimpEnabled = 1;
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simp.BaseSimpGpa = virt_to_phys(gHvContext.synICMessagePage[cpu])
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>> PAGE_SHIFT;
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DPRINT_DBG(VMBUS, "HV_X64_MSR_SIMP msr set to: %llx", simp.AsUINT64);
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wrmsrl(HV_X64_MSR_SIMP, simp.AsUINT64);
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/* Setup the Synic's event page */
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rdmsrl(HV_X64_MSR_SIEFP, siefp.AsUINT64);
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siefp.SiefpEnabled = 1;
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siefp.BaseSiefpGpa = virt_to_phys(gHvContext.synICEventPage[cpu])
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>> PAGE_SHIFT;
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DPRINT_DBG(VMBUS, "HV_X64_MSR_SIEFP msr set to: %llx", siefp.AsUINT64);
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wrmsrl(HV_X64_MSR_SIEFP, siefp.AsUINT64);
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/* Setup the interception SINT. */
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/* wrmsrl((HV_X64_MSR_SINT0 + HV_SYNIC_INTERCEPTION_SINT_INDEX), */
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/* interceptionSint.AsUINT64); */
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@ -505,13 +471,11 @@ void HvSynicInit(void *irqarg)
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return;
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Cleanup:
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if (gHvContext.GuestId == HV_LINUX_GUEST_ID) {
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if (gHvContext.synICEventPage[cpu])
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osd_PageFree(gHvContext.synICEventPage[cpu], 1);
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if (gHvContext.synICEventPage[cpu])
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osd_PageFree(gHvContext.synICEventPage[cpu], 1);
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if (gHvContext.synICMessagePage[cpu])
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osd_PageFree(gHvContext.synICMessagePage[cpu], 1);
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}
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if (gHvContext.synICMessagePage[cpu])
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osd_PageFree(gHvContext.synICMessagePage[cpu], 1);
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DPRINT_EXIT(VMBUS);
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return;
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@ -542,27 +506,20 @@ void HvSynicCleanup(void *arg)
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/* Disable the interrupt */
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wrmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, sharedSint.AsUINT64);
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/*
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* Disable and free the resources only if we are running as
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* native linux since in xenlinux, we are sharing the
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* resources with the x2v shim
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*/
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if (gHvContext.GuestId == HV_LINUX_GUEST_ID) {
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rdmsrl(HV_X64_MSR_SIMP, simp.AsUINT64);
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simp.SimpEnabled = 0;
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simp.BaseSimpGpa = 0;
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rdmsrl(HV_X64_MSR_SIMP, simp.AsUINT64);
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simp.SimpEnabled = 0;
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simp.BaseSimpGpa = 0;
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wrmsrl(HV_X64_MSR_SIMP, simp.AsUINT64);
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wrmsrl(HV_X64_MSR_SIMP, simp.AsUINT64);
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rdmsrl(HV_X64_MSR_SIEFP, siefp.AsUINT64);
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siefp.SiefpEnabled = 0;
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siefp.BaseSiefpGpa = 0;
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rdmsrl(HV_X64_MSR_SIEFP, siefp.AsUINT64);
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siefp.SiefpEnabled = 0;
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siefp.BaseSiefpGpa = 0;
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wrmsrl(HV_X64_MSR_SIEFP, siefp.AsUINT64);
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wrmsrl(HV_X64_MSR_SIEFP, siefp.AsUINT64);
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osd_PageFree(gHvContext.synICMessagePage[cpu], 1);
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osd_PageFree(gHvContext.synICEventPage[cpu], 1);
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}
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osd_PageFree(gHvContext.synICMessagePage[cpu], 1);
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osd_PageFree(gHvContext.synICEventPage[cpu], 1);
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DPRINT_EXIT(VMBUS);
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}
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@ -41,11 +41,6 @@ enum {
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#define HV_PRESENT_BIT 0x80000000
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#define HV_XENLINUX_GUEST_ID_LO 0x00000000
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#define HV_XENLINUX_GUEST_ID_HI 0x0B00B135
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#define HV_XENLINUX_GUEST_ID (((u64)HV_XENLINUX_GUEST_ID_HI << 32) \
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| HV_XENLINUX_GUEST_ID_LO)
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#define HV_LINUX_GUEST_ID_LO 0x00000000
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#define HV_LINUX_GUEST_ID_HI 0xB16B00B5
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#define HV_LINUX_GUEST_ID (((u64)HV_LINUX_GUEST_ID_HI << 32) | \
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@ -102,8 +97,9 @@ struct hv_input_signal_event_buffer {
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};
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struct hv_context {
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/* XenLinux or native Linux. If XenLinux, the hypercall and synic pages
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* has already been initialized */
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/* We only support running on top of Hyper-V
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* So at this point this really can only contain the Hyper-V ID
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*/
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u64 GuestId;
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void *HypercallPage;
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