a0086dc512
It's a .c file including other .c files, ick. Remove that mess now that the header files are unwound. Cc: Hank Janssen <hjanssen@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
649 lines
14 KiB
C
649 lines
14 KiB
C
/*
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*
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* Copyright (c) 2009, Microsoft Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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* Place - Suite 330, Boston, MA 02111-1307 USA.
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*
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* Authors:
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* Haiyang Zhang <haiyangz@microsoft.com>
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* Hank Janssen <hjanssen@microsoft.com>
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*
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*/
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/vmalloc.h>
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#include "include/logging.h"
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#include "VmbusPrivate.h"
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/* Globals */
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/* The one and only */
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HV_CONTEXT gHvContext={
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.SynICInitialized = false,
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.HypercallPage = NULL,
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.SignalEventParam = NULL,
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.SignalEventBuffer = NULL,
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};
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/*++
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Name:
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HvQueryHypervisorPresence()
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Description:
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Query the cpuid for presense of windows hypervisor
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--*/
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static int
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HvQueryHypervisorPresence (
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void
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)
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{
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unsigned int eax;
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unsigned int ebx;
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unsigned int ecx;
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unsigned int edx;
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unsigned int op;
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eax = 0;
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ebx = 0;
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ecx = 0;
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edx = 0;
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op = HvCpuIdFunctionVersionAndFeatures;
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cpuid(op, &eax, &ebx, &ecx, &edx);
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return (ecx & HV_PRESENT_BIT);
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}
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/*++
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Name:
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HvQueryHypervisorInfo()
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Description:
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Get version info of the windows hypervisor
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--*/
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static int
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HvQueryHypervisorInfo (
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void
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)
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{
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unsigned int eax;
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unsigned int ebx;
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unsigned int ecx;
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unsigned int edx;
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unsigned int maxLeaf;
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unsigned int op;
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/*
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* Its assumed that this is called after confirming that Viridian
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* is present. Query id and revision.
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*/
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eax = 0;
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ebx = 0;
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ecx = 0;
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edx = 0;
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op = HvCpuIdFunctionHvVendorAndMaxFunction;
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cpuid(op, &eax, &ebx, &ecx, &edx);
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DPRINT_INFO(VMBUS, "Vendor ID: %c%c%c%c%c%c%c%c%c%c%c%c",
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(ebx & 0xFF),
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((ebx >> 8) & 0xFF),
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((ebx >> 16) & 0xFF),
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((ebx >> 24) & 0xFF),
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(ecx & 0xFF),
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((ecx >> 8) & 0xFF),
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((ecx >> 16) & 0xFF),
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((ecx >> 24) & 0xFF),
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(edx & 0xFF),
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((edx >> 8) & 0xFF),
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((edx >> 16) & 0xFF),
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((edx >> 24) & 0xFF));
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maxLeaf = eax;
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eax = 0;
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ebx = 0;
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ecx = 0;
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edx = 0;
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op = HvCpuIdFunctionHvInterface;
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cpuid(op, &eax, &ebx, &ecx, &edx);
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DPRINT_INFO(VMBUS, "Interface ID: %c%c%c%c",
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(eax & 0xFF),
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((eax >> 8) & 0xFF),
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((eax >> 16) & 0xFF),
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((eax >> 24) & 0xFF));
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if (maxLeaf >= HvCpuIdFunctionMsHvVersion) {
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eax = 0;
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ebx = 0;
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ecx = 0;
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edx = 0;
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op = HvCpuIdFunctionMsHvVersion;
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cpuid(op, &eax, &ebx, &ecx, &edx);
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DPRINT_INFO(VMBUS, "OS Build:%d-%d.%d-%d-%d.%d",
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eax,
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ebx >> 16,
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ebx & 0xFFFF,
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ecx,
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edx >> 24,
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edx & 0xFFFFFF);
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}
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return maxLeaf;
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}
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/*++
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Name:
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HvDoHypercall()
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Description:
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Invoke the specified hypercall
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--*/
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static u64
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HvDoHypercall (
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u64 Control,
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void* Input,
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void* Output
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)
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{
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#ifdef CONFIG_X86_64
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u64 hvStatus=0;
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u64 inputAddress = (Input)? virt_to_phys(Input) : 0;
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u64 outputAddress = (Output)? virt_to_phys(Output) : 0;
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volatile void* hypercallPage = gHvContext.HypercallPage;
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DPRINT_DBG(VMBUS, "Hypercall <control %llx input phys %llx virt %p output phys %llx virt %p hypercall %p>",
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Control,
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inputAddress,
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Input,
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outputAddress,
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Output,
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hypercallPage);
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__asm__ __volatile__ ("mov %0, %%r8" : : "r" (outputAddress): "r8");
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__asm__ __volatile__ ("call *%3" : "=a"(hvStatus): "c" (Control), "d" (inputAddress), "m" (hypercallPage));
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DPRINT_DBG(VMBUS, "Hypercall <return %llx>", hvStatus);
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return hvStatus;
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#else
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u32 controlHi = Control >> 32;
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u32 controlLo = Control & 0xFFFFFFFF;
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u32 hvStatusHi = 1;
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u32 hvStatusLo = 1;
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u64 inputAddress = (Input) ? virt_to_phys(Input) : 0;
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u32 inputAddressHi = inputAddress >> 32;
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u32 inputAddressLo = inputAddress & 0xFFFFFFFF;
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u64 outputAddress = (Output) ? virt_to_phys(Output) : 0;
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u32 outputAddressHi = outputAddress >> 32;
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u32 outputAddressLo = outputAddress & 0xFFFFFFFF;
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volatile void* hypercallPage = gHvContext.HypercallPage;
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DPRINT_DBG(VMBUS, "Hypercall <control %llx input %p output %p>",
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Control,
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Input,
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Output);
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__asm__ __volatile__ ("call *%8" : "=d"(hvStatusHi), "=a"(hvStatusLo) : "d" (controlHi), "a" (controlLo), "b" (inputAddressHi), "c" (inputAddressLo), "D"(outputAddressHi), "S"(outputAddressLo), "m" (hypercallPage));
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DPRINT_DBG(VMBUS, "Hypercall <return %llx>", hvStatusLo | ((u64)hvStatusHi << 32));
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return (hvStatusLo | ((u64)hvStatusHi << 32));
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#endif /* x86_64 */
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}
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/*++
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Name:
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HvInit()
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Description:
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Main initialization routine. This routine must be called
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before any other routines in here are called
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--*/
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int HvInit (void)
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{
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int ret=0;
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int maxLeaf;
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HV_X64_MSR_HYPERCALL_CONTENTS hypercallMsr;
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void *virtAddr = NULL;
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DPRINT_ENTER(VMBUS);
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memset(gHvContext.synICEventPage, 0, sizeof(void *) * MAX_NUM_CPUS);
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memset(gHvContext.synICMessagePage, 0, sizeof(void *) * MAX_NUM_CPUS);
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if (!HvQueryHypervisorPresence())
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{
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DPRINT_ERR(VMBUS, "No Windows hypervisor detected!!");
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goto Cleanup;
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}
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DPRINT_INFO(VMBUS, "Windows hypervisor detected! Retrieving more info...");
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maxLeaf = HvQueryHypervisorInfo();
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/* HvQueryHypervisorFeatures(maxLeaf); */
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/* Determine if we are running on xenlinux (ie x2v shim) or native linux */
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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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{
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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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{
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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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{
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DPRINT_ERR(VMBUS, "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 = 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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{
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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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}
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else
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{
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DPRINT_ERR(VMBUS, "Unknown guest id (0x%llx)!!", gHvContext.GuestId);
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goto Cleanup;
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}
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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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/* Setup the global signal event param for the signal event hypercall */
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gHvContext.SignalEventBuffer = kmalloc(sizeof(HV_INPUT_SIGNAL_EVENT_BUFFER), GFP_KERNEL);
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if (!gHvContext.SignalEventBuffer)
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{
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goto Cleanup;
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}
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gHvContext.SignalEventParam = (PHV_INPUT_SIGNAL_EVENT)(ALIGN_UP((unsigned long)gHvContext.SignalEventBuffer, HV_HYPERCALL_PARAM_ALIGN));
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gHvContext.SignalEventParam->ConnectionId.Asu32 = 0;
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gHvContext.SignalEventParam->ConnectionId.u.Id = VMBUS_EVENT_CONNECTION_ID;
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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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Cleanup:
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if (virtAddr)
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{
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if (hypercallMsr.Enable)
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{
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hypercallMsr.AsUINT64 = 0;
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wrmsrl(HV_X64_MSR_HYPERCALL, hypercallMsr.AsUINT64);
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}
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vfree(virtAddr);
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}
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ret = -1;
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DPRINT_EXIT(VMBUS);
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return ret;
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}
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/*++
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Name:
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HvCleanup()
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Description:
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Cleanup routine. This routine is called normally during driver unloading or exiting.
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--*/
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void HvCleanup (void)
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{
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HV_X64_MSR_HYPERCALL_CONTENTS hypercallMsr;
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DPRINT_ENTER(VMBUS);
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if (gHvContext.SignalEventBuffer)
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{
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kfree(gHvContext.SignalEventBuffer);
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gHvContext.SignalEventBuffer = NULL;
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gHvContext.SignalEventParam = NULL;
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}
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if (gHvContext.GuestId == HV_LINUX_GUEST_ID)
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{
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if (gHvContext.HypercallPage)
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{
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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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}
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DPRINT_EXIT(VMBUS);
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}
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/*++
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Name:
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HvPostMessage()
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Description:
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Post a message using the hypervisor message IPC. This
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involves a hypercall.
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--*/
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HV_STATUS HvPostMessage(
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HV_CONNECTION_ID connectionId,
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HV_MESSAGE_TYPE messageType,
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void * payload,
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size_t payloadSize
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)
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{
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struct alignedInput {
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u64 alignment8;
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HV_INPUT_POST_MESSAGE msg;
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};
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PHV_INPUT_POST_MESSAGE alignedMsg;
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HV_STATUS status;
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unsigned long addr;
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if (payloadSize > HV_MESSAGE_PAYLOAD_BYTE_COUNT)
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{
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return -1;
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}
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addr = (unsigned long)kmalloc(sizeof(struct alignedInput), GFP_ATOMIC);
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if (!addr)
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{
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return -1;
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}
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alignedMsg = (PHV_INPUT_POST_MESSAGE)(ALIGN_UP(addr, HV_HYPERCALL_PARAM_ALIGN));
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alignedMsg->ConnectionId = connectionId;
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alignedMsg->MessageType = messageType;
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alignedMsg->PayloadSize = payloadSize;
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memcpy((void*)alignedMsg->Payload, payload, payloadSize);
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status = HvDoHypercall(HvCallPostMessage, alignedMsg, NULL) & 0xFFFF;
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kfree((void*)addr);
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return status;
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}
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/*++
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Name:
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HvSignalEvent()
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Description:
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Signal an event on the specified connection using the hypervisor event IPC. This
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involves a hypercall.
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--*/
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HV_STATUS HvSignalEvent(void)
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{
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HV_STATUS status;
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status = HvDoHypercall(HvCallSignalEvent, gHvContext.SignalEventParam, NULL) & 0xFFFF;
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return status;
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}
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/*++
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Name:
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HvSynicInit()
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Description:
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Initialize the Synthethic Interrupt Controller. If it is already initialized by
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another entity (ie x2v shim), we need to retrieve the initialized message and event pages.
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Otherwise, we create and initialize the message and event pages.
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--*/
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int HvSynicInit (u32 irqVector)
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{
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u64 version;
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HV_SYNIC_SIMP simp;
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HV_SYNIC_SIEFP siefp;
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HV_SYNIC_SINT sharedSint;
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HV_SYNIC_SCONTROL sctrl;
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u64 guestID;
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int ret=0;
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DPRINT_ENTER(VMBUS);
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if (!gHvContext.HypercallPage)
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{
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DPRINT_EXIT(VMBUS);
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return ret;
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}
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/* Check the version */
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rdmsrl(HV_X64_MSR_SVERSION, version);
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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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{
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DPRINT_INFO(VMBUS, "Skipping SIMP and SIEFP setup since it is already set.");
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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", simp.AsUINT64, siefp.AsUINT64);
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/* Determine if we are running on xenlinux (ie x2v shim) or native linux */
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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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{
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gHvContext.synICMessagePage[0] = phys_to_virt(simp.BaseSimpGpa << PAGE_SHIFT);
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gHvContext.synICEventPage[0] = phys_to_virt(siefp.BaseSiefpGpa << PAGE_SHIFT);
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}
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else
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{
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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", gHvContext.synICMessagePage[0], gHvContext.synICEventPage[0]);
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}
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else
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{
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gHvContext.synICMessagePage[0] = osd_PageAlloc(1);
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if (gHvContext.synICMessagePage[0] == NULL)
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{
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DPRINT_ERR(VMBUS, "unable to allocate SYNIC message page!!");
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goto Cleanup;
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}
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gHvContext.synICEventPage[0] = osd_PageAlloc(1);
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if (gHvContext.synICEventPage[0] == NULL)
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{
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DPRINT_ERR(VMBUS, "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[0]) >> 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[0]) >> PAGE_SHIFT;
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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), */
|
|
/* interceptionSint.AsUINT64); */
|
|
|
|
/* Setup the shared SINT. */
|
|
rdmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, sharedSint.AsUINT64);
|
|
|
|
sharedSint.AsUINT64 = 0;
|
|
sharedSint.Vector = irqVector; /* HV_SHARED_SINT_IDT_VECTOR + 0x20; */
|
|
sharedSint.Masked = false;
|
|
sharedSint.AutoEoi = true;
|
|
|
|
DPRINT_DBG(VMBUS, "HV_X64_MSR_SINT1 msr set to: %llx", sharedSint.AsUINT64);
|
|
|
|
wrmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, sharedSint.AsUINT64);
|
|
|
|
/* Enable the global synic bit */
|
|
rdmsrl(HV_X64_MSR_SCONTROL, sctrl.AsUINT64);
|
|
sctrl.Enable = 1;
|
|
|
|
wrmsrl(HV_X64_MSR_SCONTROL, sctrl.AsUINT64);
|
|
|
|
gHvContext.SynICInitialized = true;
|
|
|
|
DPRINT_EXIT(VMBUS);
|
|
|
|
return ret;
|
|
|
|
Cleanup:
|
|
ret = -1;
|
|
|
|
if (gHvContext.GuestId == HV_LINUX_GUEST_ID)
|
|
{
|
|
if (gHvContext.synICEventPage[0])
|
|
{
|
|
osd_PageFree(gHvContext.synICEventPage[0],1);
|
|
}
|
|
|
|
if (gHvContext.synICMessagePage[0])
|
|
{
|
|
osd_PageFree(gHvContext.synICMessagePage[0], 1);
|
|
}
|
|
}
|
|
|
|
DPRINT_EXIT(VMBUS);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
/*++
|
|
|
|
Name:
|
|
HvSynicCleanup()
|
|
|
|
Description:
|
|
Cleanup routine for HvSynicInit().
|
|
|
|
--*/
|
|
void HvSynicCleanup(void)
|
|
{
|
|
HV_SYNIC_SINT sharedSint;
|
|
HV_SYNIC_SIMP simp;
|
|
HV_SYNIC_SIEFP siefp;
|
|
|
|
DPRINT_ENTER(VMBUS);
|
|
|
|
if (!gHvContext.SynICInitialized)
|
|
{
|
|
DPRINT_EXIT(VMBUS);
|
|
return;
|
|
}
|
|
|
|
rdmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, sharedSint.AsUINT64);
|
|
|
|
sharedSint.Masked = 1;
|
|
|
|
/* 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;
|
|
|
|
wrmsrl(HV_X64_MSR_SIMP, simp.AsUINT64);
|
|
|
|
rdmsrl(HV_X64_MSR_SIEFP, siefp.AsUINT64);
|
|
siefp.SiefpEnabled = 0;
|
|
siefp.BaseSiefpGpa = 0;
|
|
|
|
wrmsrl(HV_X64_MSR_SIEFP, siefp.AsUINT64);
|
|
|
|
osd_PageFree(gHvContext.synICMessagePage[0], 1);
|
|
osd_PageFree(gHvContext.synICEventPage[0], 1);
|
|
}
|
|
|
|
DPRINT_EXIT(VMBUS);
|
|
}
|
|
|
|
|
|
/* eof */
|