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Date: Fri, 22 Jan 2010 19:17:50 +0000
From: Hank Janssen <hjanssen@...rosoft.com>
To: "'linux-kernel@...r.kernel.org'" <linux-kernel@...r.kernel.org>
CC: Haiyang Zhang <haiyangz@...rosoft.com>,
"gregkh@...e.de" <gregkh@...e.de>
Subject: [PATCH 1/1] 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@...rosoft.com>
Cc: Haiyang Zhang <haiyangz@...rosoft.com>.
Cc: Greg Kroah-Hartman <gregkh@...e.de>
---
drivers/staging/hv/Hv.c | 205 +++++++++++++++++++----------------------------
drivers/staging/hv/Hv.h | 10 +--
2 files changed, 84 insertions(+), 131 deletions(-)
diff --git a/drivers/staging/hv/Hv.c b/drivers/staging/hv/Hv.c
index c2809f2..51149e6 100644
--- a/drivers/staging/hv/Hv.c
+++ b/drivers/staging/hv/Hv.c
@@ -208,50 +208,51 @@ int HvInit(void)
/* HvQueryHypervisorFeatures(maxLeaf); */
/*
- * Determine if we are running on xenlinux (ie x2v shim) or native
- * linux
+ * We only support running on top of Hyper-V
*/
rdmsrl(HV_X64_MSR_GUEST_OS_ID, gHvContext.GuestId);
- if (gHvContext.GuestId == 0) {
- /* Write our OS info */
- wrmsrl(HV_X64_MSR_GUEST_OS_ID, HV_LINUX_GUEST_ID);
- gHvContext.GuestId = HV_LINUX_GUEST_ID;
+
+ if (gHvContext.GuestId != 0) {
+ DPRINT_ERR(VMBUS, "Unknown guest id (0x%llx)!!",
+ gHvContext.GuestId);
+ goto Cleanup;
}
+ /* Write our OS info */
+ wrmsrl(HV_X64_MSR_GUEST_OS_ID, HV_LINUX_GUEST_ID);
+ gHvContext.GuestId = HV_LINUX_GUEST_ID;
+
/* See if the hypercall page is already set */
rdmsrl(HV_X64_MSR_HYPERCALL, hypercallMsr.AsUINT64);
- if (gHvContext.GuestId == HV_LINUX_GUEST_ID) {
- /* Allocate the hypercall page memory */
- /* virtAddr = osd_PageAlloc(1); */
- virtAddr = osd_VirtualAllocExec(PAGE_SIZE);
-
- if (!virtAddr) {
- DPRINT_ERR(VMBUS,
- "unable to allocate hypercall page!!");
- goto Cleanup;
- }
- hypercallMsr.Enable = 1;
- /* hypercallMsr.GuestPhysicalAddress =
- * virt_to_phys(virtAddr) >> PAGE_SHIFT; */
- hypercallMsr.GuestPhysicalAddress = vmalloc_to_pfn(virtAddr);
- wrmsrl(HV_X64_MSR_HYPERCALL, hypercallMsr.AsUINT64);
+ /*
+ * Allocate the hypercall page memory
+ * virtAddr = osd_PageAlloc(1);
+ */
+ virtAddr = osd_VirtualAllocExec(PAGE_SIZE);
- /* Confirm that hypercall page did get setup. */
- hypercallMsr.AsUINT64 = 0;
- rdmsrl(HV_X64_MSR_HYPERCALL, hypercallMsr.AsUINT64);
- if (!hypercallMsr.Enable) {
- DPRINT_ERR(VMBUS, "unable to set hypercall page!!");
- goto Cleanup;
- }
+ if (!virtAddr) {
+ DPRINT_ERR(VMBUS,
+ "unable to allocate hypercall page!!");
+ goto Cleanup;
+ }
- gHvContext.HypercallPage = virtAddr;
- } else {
- DPRINT_ERR(VMBUS, "Unknown guest id (0x%llx)!!",
- gHvContext.GuestId);
+ hypercallMsr.Enable = 1;
+
+ hypercallMsr.GuestPhysicalAddress = vmalloc_to_pfn(virtAddr);
+ wrmsrl(HV_X64_MSR_HYPERCALL, hypercallMsr.AsUINT64);
+
+ /* Confirm that hypercall page did get setup. */
+ hypercallMsr.AsUINT64 = 0;
+ rdmsrl(HV_X64_MSR_HYPERCALL, hypercallMsr.AsUINT64);
+
+ if (!hypercallMsr.Enable) {
+ DPRINT_ERR(VMBUS, "unable to set hypercall page!!");
goto Cleanup;
}
+ gHvContext.HypercallPage = virtAddr;
+
DPRINT_INFO(VMBUS, "Hypercall page VA=%p, PA=0x%0llx",
gHvContext.HypercallPage,
(u64)hypercallMsr.GuestPhysicalAddress << PAGE_SHIFT);
@@ -273,8 +274,6 @@ int HvInit(void)
gHvContext.SignalEventParam->FlagNumber = 0;
gHvContext.SignalEventParam->RsvdZ = 0;
- /* DPRINT_DBG(VMBUS, "My id %llu", HvGetCurrentPartitionId()); */
-
DPRINT_EXIT(VMBUS);
return ret;
@@ -311,17 +310,14 @@ void HvCleanup(void)
kfree(gHvContext.SignalEventBuffer);
}
- if (gHvContext.GuestId == HV_LINUX_GUEST_ID) {
- if (gHvContext.HypercallPage) {
- hypercallMsr.AsUINT64 = 0;
- wrmsrl(HV_X64_MSR_HYPERCALL, hypercallMsr.AsUINT64);
- vfree(gHvContext.HypercallPage);
- gHvContext.HypercallPage = NULL;
- }
+ if (gHvContext.HypercallPage) {
+ hypercallMsr.AsUINT64 = 0;
+ wrmsrl(HV_X64_MSR_HYPERCALL, hypercallMsr.AsUINT64);
+ vfree(gHvContext.HypercallPage);
+ gHvContext.HypercallPage = NULL;
}
DPRINT_EXIT(VMBUS);
-
}
/**
@@ -393,7 +389,7 @@ void HvSynicInit(void *irqarg)
union hv_synic_siefp siefp;
union hv_synic_sint sharedSint;
union hv_synic_scontrol sctrl;
- u64 guestID;
+
u32 irqVector = *((u32 *)(irqarg));
int cpu = smp_processor_id();
@@ -409,71 +405,41 @@ void HvSynicInit(void *irqarg)
DPRINT_INFO(VMBUS, "SynIC version: %llx", version);
- /* TODO: Handle SMP */
- if (gHvContext.GuestId == HV_XENLINUX_GUEST_ID) {
- DPRINT_INFO(VMBUS, "Skipping SIMP and SIEFP setup since "
- "it is already set.");
-
- rdmsrl(HV_X64_MSR_SIMP, simp.AsUINT64);
- rdmsrl(HV_X64_MSR_SIEFP, siefp.AsUINT64);
-
- DPRINT_DBG(VMBUS, "Simp: %llx, Sifep: %llx",
- simp.AsUINT64, siefp.AsUINT64);
-
- /*
- * Determine if we are running on xenlinux (ie x2v shim) or
- * native linux
- */
- rdmsrl(HV_X64_MSR_GUEST_OS_ID, guestID);
- if (guestID == HV_LINUX_GUEST_ID) {
- gHvContext.synICMessagePage[cpu] =
- phys_to_virt(simp.BaseSimpGpa << PAGE_SHIFT);
- gHvContext.synICEventPage[cpu] =
- phys_to_virt(siefp.BaseSiefpGpa << PAGE_SHIFT);
- } else {
- DPRINT_ERR(VMBUS, "unknown guest id!!");
- goto Cleanup;
- }
- DPRINT_DBG(VMBUS, "MAPPED: Simp: %p, Sifep: %p",
- gHvContext.synICMessagePage[cpu],
- gHvContext.synICEventPage[cpu]);
- } else {
- gHvContext.synICMessagePage[cpu] = (void *)get_zeroed_page(GFP_ATOMIC);
- if (gHvContext.synICMessagePage[cpu] == NULL) {
- DPRINT_ERR(VMBUS,
- "unable to allocate SYNIC message page!!");
- goto Cleanup;
- }
+ gHvContext.synICMessagePage[cpu] = (void *)get_zeroed_page(GFP_ATOMIC);
- gHvContext.synICEventPage[cpu] = (void *)get_zeroed_page(GFP_ATOMIC);
- if (gHvContext.synICEventPage[cpu] == NULL) {
- DPRINT_ERR(VMBUS,
- "unable to allocate SYNIC event page!!");
- goto Cleanup;
- }
+ if (gHvContext.synICMessagePage[cpu] == NULL) {
+ DPRINT_ERR(VMBUS,
+ "unable to allocate SYNIC message page!!");
+ goto Cleanup;
+ }
- /* Setup the Synic's message page */
- rdmsrl(HV_X64_MSR_SIMP, simp.AsUINT64);
- simp.SimpEnabled = 1;
- simp.BaseSimpGpa = virt_to_phys(gHvContext.synICMessagePage[cpu])
- >> PAGE_SHIFT;
+ gHvContext.synICEventPage[cpu] = (void *)get_zeroed_page(GFP_ATOMIC);
- DPRINT_DBG(VMBUS, "HV_X64_MSR_SIMP msr set to: %llx",
- simp.AsUINT64);
+ if (gHvContext.synICEventPage[cpu] == NULL) {
+ DPRINT_ERR(VMBUS,
+ "unable to allocate SYNIC event page!!");
+ goto Cleanup;
+ }
- wrmsrl(HV_X64_MSR_SIMP, simp.AsUINT64);
+ /* Setup the Synic's message page */
+ rdmsrl(HV_X64_MSR_SIMP, simp.AsUINT64);
+ simp.SimpEnabled = 1;
+ simp.BaseSimpGpa = virt_to_phys(gHvContext.synICMessagePage[cpu])
+ >> PAGE_SHIFT;
- /* Setup the Synic's event page */
- rdmsrl(HV_X64_MSR_SIEFP, siefp.AsUINT64);
- siefp.SiefpEnabled = 1;
- siefp.BaseSiefpGpa = virt_to_phys(gHvContext.synICEventPage[cpu])
- >> PAGE_SHIFT;
+ DPRINT_DBG(VMBUS, "HV_X64_MSR_SIMP msr set to: %llx", simp.AsUINT64);
- DPRINT_DBG(VMBUS, "HV_X64_MSR_SIEFP msr set to: %llx",
- siefp.AsUINT64);
+ wrmsrl(HV_X64_MSR_SIMP, simp.AsUINT64);
- wrmsrl(HV_X64_MSR_SIEFP, siefp.AsUINT64);
- }
+ /* Setup the Synic's event page */
+ rdmsrl(HV_X64_MSR_SIEFP, siefp.AsUINT64);
+ siefp.SiefpEnabled = 1;
+ siefp.BaseSiefpGpa = virt_to_phys(gHvContext.synICEventPage[cpu])
+ >> PAGE_SHIFT;
+
+ DPRINT_DBG(VMBUS, "HV_X64_MSR_SIEFP msr set to: %llx", siefp.AsUINT64);
+
+ wrmsrl(HV_X64_MSR_SIEFP, siefp.AsUINT64);
/* Setup the interception SINT. */
/* wrmsrl((HV_X64_MSR_SINT0 + HV_SYNIC_INTERCEPTION_SINT_INDEX), */
@@ -505,13 +471,11 @@ void HvSynicInit(void *irqarg)
return;
Cleanup:
- if (gHvContext.GuestId == HV_LINUX_GUEST_ID) {
- if (gHvContext.synICEventPage[cpu])
- osd_PageFree(gHvContext.synICEventPage[cpu], 1);
+ if (gHvContext.synICEventPage[cpu])
+ osd_PageFree(gHvContext.synICEventPage[cpu], 1);
- if (gHvContext.synICMessagePage[cpu])
- osd_PageFree(gHvContext.synICMessagePage[cpu], 1);
- }
+ if (gHvContext.synICMessagePage[cpu])
+ osd_PageFree(gHvContext.synICMessagePage[cpu], 1);
DPRINT_EXIT(VMBUS);
return;
@@ -542,27 +506,20 @@ void HvSynicCleanup(void *arg)
/* Disable the interrupt */
wrmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, sharedSint.AsUINT64);
- /*
- * Disable and free the resources only if we are running as
- * native linux since in xenlinux, we are sharing the
- * resources with the x2v shim
- */
- if (gHvContext.GuestId == HV_LINUX_GUEST_ID) {
- rdmsrl(HV_X64_MSR_SIMP, simp.AsUINT64);
- simp.SimpEnabled = 0;
- simp.BaseSimpGpa = 0;
+ rdmsrl(HV_X64_MSR_SIMP, simp.AsUINT64);
+ simp.SimpEnabled = 0;
+ simp.BaseSimpGpa = 0;
- wrmsrl(HV_X64_MSR_SIMP, simp.AsUINT64);
+ wrmsrl(HV_X64_MSR_SIMP, simp.AsUINT64);
- rdmsrl(HV_X64_MSR_SIEFP, siefp.AsUINT64);
- siefp.SiefpEnabled = 0;
- siefp.BaseSiefpGpa = 0;
+ rdmsrl(HV_X64_MSR_SIEFP, siefp.AsUINT64);
+ siefp.SiefpEnabled = 0;
+ siefp.BaseSiefpGpa = 0;
- wrmsrl(HV_X64_MSR_SIEFP, siefp.AsUINT64);
+ wrmsrl(HV_X64_MSR_SIEFP, siefp.AsUINT64);
- osd_PageFree(gHvContext.synICMessagePage[cpu], 1);
- osd_PageFree(gHvContext.synICEventPage[cpu], 1);
- }
+ osd_PageFree(gHvContext.synICMessagePage[cpu], 1);
+ osd_PageFree(gHvContext.synICEventPage[cpu], 1);
DPRINT_EXIT(VMBUS);
}
diff --git a/drivers/staging/hv/Hv.h b/drivers/staging/hv/Hv.h
index fce4b5c..41f5ebb 100644
--- a/drivers/staging/hv/Hv.h
+++ b/drivers/staging/hv/Hv.h
@@ -41,11 +41,6 @@ enum {
#define HV_PRESENT_BIT 0x80000000
-#define HV_XENLINUX_GUEST_ID_LO 0x00000000
-#define HV_XENLINUX_GUEST_ID_HI 0x0B00B135
-#define HV_XENLINUX_GUEST_ID (((u64)HV_XENLINUX_GUEST_ID_HI << 32) \
- | HV_XENLINUX_GUEST_ID_LO)
-
#define HV_LINUX_GUEST_ID_LO 0x00000000
#define HV_LINUX_GUEST_ID_HI 0xB16B00B5
#define HV_LINUX_GUEST_ID (((u64)HV_LINUX_GUEST_ID_HI << 32) | \
@@ -102,8 +97,9 @@ struct hv_input_signal_event_buffer {
};
struct hv_context {
- /* XenLinux or native Linux. If XenLinux, the hypercall and synic pages
- * has already been initialized */
+ /* We only support running on top of Hyper-V
+ * So at this point this really can only contain the Hyper-V ID
+ */
u64 GuestId;
void *HypercallPage;
--
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