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| * KVM: X86: Add kvm_read_guest_page_mmu functionJoerg Roedel2010-10-24
| | | | | | | | | | | | | | | | | | This patch adds a function which can read from the guests physical memory or from the guest's guest physical memory. This will be used in the two-dimensional page table walker. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: MMU: Implement nested gva_to_gpa functionsJoerg Roedel2010-10-24
| | | | | | | | | | | | | | | | This patch adds the functions to do a nested l2_gva to l1_gpa page table walk. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: X86: Introduce pointer to mmu context used for gva_to_gpaJoerg Roedel2010-10-24
| | | | | | | | | | | | | | | | This patch introduces the walk_mmu pointer which points to the mmu-context currently used for gva_to_gpa translations. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: MMU: Add infrastructure for two-level page walkerJoerg Roedel2010-10-24
| | | | | | | | | | | | | | | | | | This patch introduces a mmu-callback to translate gpa addresses in the walk_addr code. This is later used to translate l2_gpa addresses into l1_gpa addresses. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: MMU: Introduce generic walk_addr functionJoerg Roedel2010-10-24
| | | | | | | | | | | | | | | | | | | | | | This is the first patch in the series towards a generic walk_addr implementation which could walk two-dimensional page tables in the end. In this first step the walk_addr function is renamed into walk_addr_generic which takes a mmu context as an additional parameter. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: MMU: Track page fault data in struct vcpuJoerg Roedel2010-10-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch introduces a struct with two new fields in vcpu_arch for x86: * fault.address * fault.error_code This will be used to correctly propagate page faults back into the guest when we could have either an ordinary page fault or a nested page fault. In the case of a nested page fault the fault-address is different from the original address that should be walked. So we need to keep track about the real fault-address. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: MMU: Let is_rsvd_bits_set take mmu context instead of vcpuJoerg Roedel2010-10-24
| | | | | | | | | | | | | | | | This patch changes is_rsvd_bits_set() function prototype to take only a kvm_mmu context instead of a full vcpu. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: MMU: Introduce kvm_init_shadow_mmu helper functionJoerg Roedel2010-10-24
| | | | | | | | | | | | | | | | | | | | | | Some logic of the init_kvm_softmmu function is required to build the Nested Nested Paging context. So factor the required logic into a seperate function and export it. Also make the whole init path suitable for more than one mmu context. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: MMU: Introduce inject_page_fault function pointerJoerg Roedel2010-10-24
| | | | | | | | | | | | | | | | | | | | This patch introduces an inject_page_fault function pointer into struct kvm_mmu which will be used to inject a page fault. This will be used later when Nested Nested Paging is implemented. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: MMU: Introduce get_cr3 function pointerJoerg Roedel2010-10-24
| | | | | | | | | | | | | | | | This function pointer in the MMU context is required to implement Nested Nested Paging. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: X86: Introduce a tdp_set_cr3 functionJoerg Roedel2010-10-24
| | | | | | | | | | | | | | | | | | This patch introduces a special set_tdp_cr3 function pointer in kvm_x86_ops which is only used for tpd enabled mmu contexts. This allows to remove some hacks from svm code. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: MMU: Make set_cr3 a function pointer in kvm_mmuJoerg Roedel2010-10-24
| | | | | | | | | | | | | | | | | | This is necessary to implement Nested Nested Paging. As a side effect this allows some cleanups in the SVM nested paging code. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: MMU: Make tdp_enabled a mmu-context parameterJoerg Roedel2010-10-24
| | | | | | | | | | | | | | | | | | | | | | This patch changes the tdp_enabled flag from its global meaning to the mmu-context and renames it to direct_map there. This is necessary for Nested SVM with emulation of Nested Paging where we need an extra MMU context to shadow the Nested Nested Page Table. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: MMU: Check for root_level instead of long modeJoerg Roedel2010-10-24
| | | | | | | | | | | | | | | | | | | | The walk_addr function checks for !is_long_mode in its 64 bit version. But what is meant here is a check for pae paging. Change the condition to really check for pae paging so that it also works with nested nested paging. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: x86: Emulate MSR_EBC_FREQUENCY_IDJes Sorensen2010-10-24
| | | | | | | | | | | | | | | | | | | | Some operating systems store data about the host processor at the time of installation, and when booted on a more uptodate cpu tries to read MSR_EBC_FREQUENCY_ID. This has been found with XP. Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
| * KVM: SVM: Clean up rip handling in vmrun emulationRoedel, Joerg2010-10-24
| | | | | | | | | | | | | | | | | | This patch changes the rip handling in the vmrun emulation path from using next_rip to the generic kvm register access functions. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
| * KVM: SVM: Restore correct registers after sel_cr0 intercept emulationJoerg Roedel2010-10-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch implements restoring of the correct rip, rsp, and rax after the svm emulation in KVM injected a selective_cr0 write intercept into the guest hypervisor. The problem was that the vmexit is emulated in the instruction emulation which later commits the registers right after the write-cr0 instruction. So the l1 guest will continue to run with the l2 rip, rsp and rax resulting in unpredictable behavior. This patch is not the final word, it is just an easy patch to fix the issue. The real fix will be done when the instruction emulator is made aware of nested virtualization. Until this is done this patch fixes the issue and provides an easy way to fix this in -stable too. Cc: stable@kernel.org Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
| * KVM: MMU: Fix 32 bit legacy paging with NPTJoerg Roedel2010-10-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes 32 bit legacy paging with NPT enabled. The mmu_check_root call on the top-level of the loop causes root_gfn to take values (in the tdp_enabled path) which are outside of guest memory. So the mmu_check_root call fails at some point in the loop interation causing the guest to tiple-fault. This patch changes the mmu_check_root calls to the places where they are really necessary. As a side-effect it introduces a check for the root of a pae page table too. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
| * KVM: MMU: lower the aduit frequencyXiao Guangrong2010-10-24
| | | | | | | | | | | | | | | | The audit is very high overhead, so we need lower the frequency to assure the guest is running. Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: MMU: improve spte auditXiao Guangrong2010-10-24
| | | | | | | | | | | | | | | | Both audit_mappings() and audit_sptes_have_rmaps() need to walk vcpu's page table, so we can do these checking in a spte walking Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: MMU: improve active sp auditXiao Guangrong2010-10-24
| | | | | | | | | | | | | | | | Both audit_rmap() and audit_write_protection() need to walk all active sp, so we can do these checking in a sp walking Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: MMU: move audit to a separate fileXiao Guangrong2010-10-24
| | | | | | | | | | | | | | Move the audit code from arch/x86/kvm/mmu.c to arch/x86/kvm/mmu_audit.c Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: MMU: support disable/enable mmu audit dynamiclyXiao Guangrong2010-10-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a r/w module parameter named 'mmu_audit', it can control audit enable/disable: enable: echo 1 > /sys/module/kvm/parameters/mmu_audit disable: echo 0 > /sys/module/kvm/parameters/mmu_audit This patch not change the logic Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: Fix guest kernel crash on MSR_K7_CLK_CTLJes Sorensen2010-10-24
| | | | | | | | | | | | | | | | | | | | MSR_K7_CLK_CTL is a no longer documented MSR, which is only relevant on said old AMD CPU models. This change returns the expected value, which the Linux kernel is expecting to avoid writing back the MSR, plus it ignores all writes to the MSR. Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: i8259: Make ICW1 conform to specAvi Kivity2010-10-24
| | | | | | | | | | | | | | ICW is not a full reset, instead it resets a limited number of registers in the PIC. Change ICW1 emulation to only reset those registers. Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: x86 emulator: clean up control flow in x86_emulate_insn()Avi Kivity2010-10-24
| | | | | | | | | | | | | | | | | | | | | | | | x86_emulate_insn() is full of things like if (rc != X86EMUL_CONTINUE) goto done; break; consolidate all of those at the end of the switch statement. Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: x86 emulator: fix group 11 decoding for reg != 0Avi Kivity2010-10-24
| | | | | | | | | | | | These are all undefined. Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: x86 emulator: use single stage decoding for mov instructionsAvi Kivity2010-10-24
| | | | | | | | Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: Don't save/restore MSR_IA32_PERF_STATUSAvi Kivity2010-10-24
| | | | | | | | | | | | It is read/only; restoring it only results in annoying messages. Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: SVM: init_vmcb should reset vcpu->eferMarcelo Tosatti2010-10-24
| | | | | | | | | | | | | | | | | | Otherwise EFER_LMA bit is retained across a SIPI reset. Fixes guest cpu onlining. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: SVM: reset mmu context in init_vmcbMarcelo Tosatti2010-10-24
| | | | | | | | | | | | | | | | | | | | | | Since commit aad827034e419fa no mmu reinitialization is performed via init_vmcb. Zero vcpu->arch.cr0 and pass the reset value as a parameter to kvm_set_cr0. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: Fix pio trace directionAvi Kivity2010-10-24
| | | | | | | | | | | | out = write, in = read, not the other way round. Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: MMU: remove count_rmaps()Xiao Guangrong2010-10-24
| | | | | | | | | | | | | | Nothing is checked in count_rmaps(), so remove it Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: MMU: rewrite audit_mappings_page() functionXiao Guangrong2010-10-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | There is a bugs in this function, we call gfn_to_pfn() and kvm_mmu_gva_to_gpa_read() in atomic context(kvm_mmu_audit() is called under the spinlock(mmu_lock)'s protection). This patch fix it by: - introduce gfn_to_pfn_atomic instead of gfn_to_pfn - get the mapping gfn from kvm_mmu_page_get_gfn() And it adds 'notrap' ptes check in unsync/direct sps Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: MMU: fix wrong not write protected sp reportXiao Guangrong2010-10-24
| | | | | | | | | | | | | | | | | | | | | | | | The audit code reports some sp not write protected in current code, it's just the bug in audit_write_protection(), since: - the invalid sp not need write protected - using uninitialize local variable('gfn') - call kvm_mmu_audit() out of mmu_lock's protection Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: MMU: check rmap for every spteXiao Guangrong2010-10-24
| | | | | | | | | | | | | | | | The read-only spte also has reverse mapping, so fix the code to check them, also modify the function name to fit its doing Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: MMU: fix compile warning in audit codeXiao Guangrong2010-10-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | fix: arch/x86/kvm/mmu.c: In function ‘kvm_mmu_unprotect_page’: arch/x86/kvm/mmu.c:1741: warning: format ‘%lx’ expects type ‘long unsigned int’, but argument 3 has type ‘gfn_t’ arch/x86/kvm/mmu.c:1745: warning: format ‘%lx’ expects type ‘long unsigned int’, but argument 3 has type ‘gfn_t’ arch/x86/kvm/mmu.c: In function ‘mmu_unshadow’: arch/x86/kvm/mmu.c:1761: warning: format ‘%lx’ expects type ‘long unsigned int’, but argument 3 has type ‘gfn_t’ arch/x86/kvm/mmu.c: In function ‘set_spte’: arch/x86/kvm/mmu.c:2005: warning: format ‘%lx’ expects type ‘long unsigned int’, but argument 3 has type ‘gfn_t’ arch/x86/kvm/mmu.c: In function ‘mmu_set_spte’: arch/x86/kvm/mmu.c:2033: warning: format ‘%lx’ expects type ‘long unsigned int’, but argument 7 has type ‘gfn_t’ Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: pit: Do not check pending pit timer in vcpu threadJason Wang2010-10-24
| | | | | | | | | | | | | | | | | | Pit interrupt injection was done by workqueue, so no need to check pending pit timer in vcpu thread which could lead unnecessary unblocking of vcpu. Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: x86 emulator: simplify ALU opcode block decode furtherAvi Kivity2010-10-24
| | | | | | | | | | | | | | | | | | | | The ALU opcode block is very regular; introduce D6ALU() to define decode flags for 6 instructions at a time. Suggested by Paolo Bonzini. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
| * KVM: Fix build error due to 64-bit division in nsec_to_cycles()Avi Kivity2010-10-24
| | | | | | | | | | | | | | Use do_div() instead. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
| * KVM: x86 emulator: trap and propagate #DE from DIV and IDIVAvi Kivity2010-10-24
| | | | | | | | | | Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
| * KVM: x86 emulator: add macros for executing instructions that may trapAvi Kivity2010-10-24
| | | | | | | | | | | | | | Like DIV and IDIV. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
| * KVM: x86 emulator: simplify instruction decode flags for opcodes 0F 00-FFAvi Kivity2010-10-24
| | | | | | | | | | | | | | Use the new byte/word dual opcode decode. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
| * KVM: x86 emulator: simplify instruction decode flags for opcodes E0-FFAvi Kivity2010-10-24
| | | | | | | | | | | | | | Use the new byte/word dual opcode decode. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
| * KVM: x86 emulator: simplify instruction decode flags for opcodes C0-DFAvi Kivity2010-10-24
| | | | | | | | | | | | | | Use the new byte/word dual opcode decode. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
| * KVM: x86 emulator: simplify instruction decode flags for opcodes A0-AFAvi Kivity2010-10-24
| | | | | | | | | | | | | | Use the new byte/word dual opcode decode. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
| * KVM: x86 emulator: simplify instruction decode flags for opcodes 80-8FAvi Kivity2010-10-24
| | | | | | | | | | | | | | Use the new byte/word dual opcode decode. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
| * KVM: x86 emulator: simplify string instruction decode flagsAvi Kivity2010-10-24
| | | | | | | | | | | | | | Use the new byte/word dual opcode decode. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
| * KVM: x86 emulator: simplify ALU block (opcodes 00-3F) decode flagsAvi Kivity2010-10-24
| | | | | | | | | | | | | | Use the new byte/word dual opcode decode. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
| * KVM: x86 emulator: support byte/word opcode pairsAvi Kivity2010-10-24
| | | | | | | | | | | | | | | | Many x86 instructions come in byte and word variants distinguished with bit 0 of the opcode. Add macros to aid in defining them. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
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