From 8482644aea11e0647867732319ccf35879a9acc2 Mon Sep 17 00:00:00 2001 From: Takuya Yoshikawa Date: Wed, 27 Feb 2013 19:45:25 +0900 Subject: KVM: set_memory_region: Refactor commit_memory_region() This patch makes the parameter old a const pointer to the old memory slot and adds a new parameter named change to know the change being requested: the former is for removing extra copying and the latter is for cleaning up the code. Signed-off-by: Takuya Yoshikawa Signed-off-by: Marcelo Tosatti --- arch/powerpc/include/asm/kvm_ppc.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/powerpc/include') diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h index 44a657adf416..44fa9ad1d62c 100644 --- a/arch/powerpc/include/asm/kvm_ppc.h +++ b/arch/powerpc/include/asm/kvm_ppc.h @@ -152,7 +152,7 @@ extern int kvmppc_core_prepare_memory_region(struct kvm *kvm, struct kvm_userspace_memory_region *mem); extern void kvmppc_core_commit_memory_region(struct kvm *kvm, struct kvm_userspace_memory_region *mem, - struct kvm_memory_slot old); + const struct kvm_memory_slot *old); extern int kvm_vm_ioctl_get_smmu_info(struct kvm *kvm, struct kvm_ppc_smmu_info *info); extern void kvmppc_core_flush_memslot(struct kvm *kvm, -- cgit v1.2.3 From 78accda4f888c77122cf3da6185f905d4677eb07 Mon Sep 17 00:00:00 2001 From: Bharat Bhushan Date: Sun, 24 Feb 2013 18:57:12 +0000 Subject: KVM: PPC: Added one_reg interface for timer registers If userspace wants to change some specific bits of TSR (timer status register) then it uses GET/SET_SREGS ioctl interface. So the steps will be: i) user-space will make get ioctl, ii) change TSR in userspace iii) then make set ioctl. It can happen that TSR gets changed by kernel after step i) and before step iii). To avoid this we have added below one_reg ioctls for oring and clearing specific bits in TSR. This patch adds one registerface for: 1) setting specific bit in TSR (timer status register) 2) clearing specific bit in TSR (timer status register) 3) setting/getting the TCR register. There are cases where we want to only change TCR and not TSR. Although we can uses SREGS without KVM_SREGS_E_UPDATE_TSR flag but I think one reg is better. I am open if someone feels we should use SREGS only here. 4) getting/setting TSR register Signed-off-by: Bharat Bhushan Signed-off-by: Alexander Graf --- arch/powerpc/include/uapi/asm/kvm.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'arch/powerpc/include') diff --git a/arch/powerpc/include/uapi/asm/kvm.h b/arch/powerpc/include/uapi/asm/kvm.h index 16064d00adb9..ef072b1a6e3f 100644 --- a/arch/powerpc/include/uapi/asm/kvm.h +++ b/arch/powerpc/include/uapi/asm/kvm.h @@ -417,4 +417,9 @@ struct kvm_get_htab_header { #define KVM_REG_PPC_EPCR (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x85) #define KVM_REG_PPC_EPR (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x86) +/* Timer Status Register OR/CLEAR interface */ +#define KVM_REG_PPC_OR_TSR (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x87) +#define KVM_REG_PPC_CLEAR_TSR (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x88) +#define KVM_REG_PPC_TCR (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x89) +#define KVM_REG_PPC_TSR (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x8a) #endif /* __LINUX_KVM_POWERPC_H */ -- cgit v1.2.3 From 15b708beee6841e0a59ded702c8bfe3042a5b5a4 Mon Sep 17 00:00:00 2001 From: Bharat Bhushan Date: Wed, 27 Feb 2013 18:13:10 +0000 Subject: KVM: PPC: booke: Added debug handler Installed debug handler will be used for guest debug support and debug facility emulation features (patches for these features will follow this patch). Signed-off-by: Liu Yu [bharat.bhushan@freescale.com: Substantial changes] Signed-off-by: Bharat Bhushan Signed-off-by: Alexander Graf --- arch/powerpc/include/asm/kvm_host.h | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/powerpc/include') diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h index d1bb86074721..e34f8fee9080 100644 --- a/arch/powerpc/include/asm/kvm_host.h +++ b/arch/powerpc/include/asm/kvm_host.h @@ -504,6 +504,7 @@ struct kvm_vcpu_arch { u32 tlbcfg[4]; u32 mmucfg; u32 epr; + u32 crit_save; struct kvmppc_booke_debug_reg dbg_reg; #endif gpa_t paddr_accessed; -- cgit v1.2.3 From 4fe27d2addda8af7714546a69369fb92dddcf9a3 Mon Sep 17 00:00:00 2001 From: Paul Mackerras Date: Thu, 14 Feb 2013 14:00:25 +0000 Subject: KVM: PPC: Remove unused argument to kvmppc_core_dequeue_external Currently kvmppc_core_dequeue_external() takes a struct kvm_interrupt * argument and does nothing with it, in any of its implementations. This removes it in order to make things easier for forthcoming in-kernel interrupt controller emulation code. Signed-off-by: Paul Mackerras Signed-off-by: Alexander Graf --- arch/powerpc/include/asm/kvm_ppc.h | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) (limited to 'arch/powerpc/include') diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h index 44fa9ad1d62c..f58930779ae8 100644 --- a/arch/powerpc/include/asm/kvm_ppc.h +++ b/arch/powerpc/include/asm/kvm_ppc.h @@ -104,8 +104,7 @@ extern void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu); extern void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu); extern void kvmppc_core_queue_external(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq); -extern void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu, - struct kvm_interrupt *irq); +extern void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu); extern void kvmppc_core_flush_tlb(struct kvm_vcpu *vcpu); extern int kvmppc_core_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu, -- cgit v1.2.3 From 8c32a2ea655d035798d3270717924ad8be903e24 Mon Sep 17 00:00:00 2001 From: Bharat Bhushan Date: Wed, 20 Mar 2013 20:24:58 +0000 Subject: Added ONE_REG interface for debug instruction This patch adds the one_reg interface to get the special instruction to be used for setting software breakpoint from userspace. Signed-off-by: Bharat Bhushan Signed-off-by: Alexander Graf --- arch/powerpc/include/asm/kvm_book3s.h | 2 ++ arch/powerpc/include/asm/kvm_booke.h | 2 ++ arch/powerpc/include/uapi/asm/kvm.h | 4 ++++ 3 files changed, 8 insertions(+) (limited to 'arch/powerpc/include') diff --git a/arch/powerpc/include/asm/kvm_book3s.h b/arch/powerpc/include/asm/kvm_book3s.h index 5a56e1c5f851..bc81842ea25a 100644 --- a/arch/powerpc/include/asm/kvm_book3s.h +++ b/arch/powerpc/include/asm/kvm_book3s.h @@ -458,6 +458,8 @@ static inline bool kvmppc_critical_section(struct kvm_vcpu *vcpu) #define OSI_SC_MAGIC_R4 0x77810F9B #define INS_DCBZ 0x7c0007ec +/* TO = 31 for unconditional trap */ +#define INS_TW 0x7fe00008 /* LPIDs we support with this build -- runtime limit may be lower */ #define KVMPPC_NR_LPIDS (LPID_RSVD + 1) diff --git a/arch/powerpc/include/asm/kvm_booke.h b/arch/powerpc/include/asm/kvm_booke.h index b7cd3356a532..d3c1eb34c986 100644 --- a/arch/powerpc/include/asm/kvm_booke.h +++ b/arch/powerpc/include/asm/kvm_booke.h @@ -26,6 +26,8 @@ /* LPIDs we support with this build -- runtime limit may be lower */ #define KVMPPC_NR_LPIDS 64 +#define KVMPPC_INST_EHPRIV 0x7c00021c + static inline void kvmppc_set_gpr(struct kvm_vcpu *vcpu, int num, ulong val) { vcpu->arch.gpr[num] = val; diff --git a/arch/powerpc/include/uapi/asm/kvm.h b/arch/powerpc/include/uapi/asm/kvm.h index ef072b1a6e3f..c2ff99c01562 100644 --- a/arch/powerpc/include/uapi/asm/kvm.h +++ b/arch/powerpc/include/uapi/asm/kvm.h @@ -422,4 +422,8 @@ struct kvm_get_htab_header { #define KVM_REG_PPC_CLEAR_TSR (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x88) #define KVM_REG_PPC_TCR (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x89) #define KVM_REG_PPC_TSR (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x8a) + +/* Debugging: Special instruction for software breakpoint */ +#define KVM_REG_PPC_DEBUG_INST (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x8b) + #endif /* __LINUX_KVM_POWERPC_H */ -- cgit v1.2.3 From adccf65ca431b41733483f476e8de9e3cf171c44 Mon Sep 17 00:00:00 2001 From: Bharat Bhushan Date: Thu, 25 Apr 2013 06:33:57 +0000 Subject: KVM: PPC: cache flush for kernel managed pages Kernel can only access pages which maps as memory. So flush only the valid kernel pages. Signed-off-by: Bharat Bhushan Signed-off-by: Alexander Graf --- arch/powerpc/include/asm/kvm_ppc.h | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) (limited to 'arch/powerpc/include') diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h index f58930779ae8..4794de6ea379 100644 --- a/arch/powerpc/include/asm/kvm_ppc.h +++ b/arch/powerpc/include/asm/kvm_ppc.h @@ -282,8 +282,15 @@ void kvmppc_init_lpid(unsigned long nr_lpids); static inline void kvmppc_mmu_flush_icache(pfn_t pfn) { - /* Clear i-cache for new pages */ struct page *page; + /* + * We can only access pages that the kernel maps + * as memory. Bail out for unmapped ones. + */ + if (!pfn_valid(pfn)) + return; + + /* Clear i-cache for new pages */ page = pfn_to_page(pfn); if (!test_bit(PG_arch_1, &page->flags)) { flush_dcache_icache_page(page); -- cgit v1.2.3 From 092d62ee93039bfccbb3a36c69d0c3ee0966a97a Mon Sep 17 00:00:00 2001 From: Bharat Bhushan Date: Mon, 8 Apr 2013 00:32:12 +0000 Subject: KVM: PPC: debug stub interface parameter defined This patch defines the interface parameter for KVM_SET_GUEST_DEBUG ioctl support. Follow up patches will use this for setting up hardware breakpoints, watchpoints and software breakpoints. Also kvm_arch_vcpu_ioctl_set_guest_debug() is brought one level below. This is because I am not sure what is required for book3s. So this ioctl behaviour will not change for book3s. Signed-off-by: Bharat Bhushan Signed-off-by: Alexander Graf --- arch/powerpc/include/uapi/asm/kvm.h | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) (limited to 'arch/powerpc/include') diff --git a/arch/powerpc/include/uapi/asm/kvm.h b/arch/powerpc/include/uapi/asm/kvm.h index c2ff99c01562..c0c38ed9c97d 100644 --- a/arch/powerpc/include/uapi/asm/kvm.h +++ b/arch/powerpc/include/uapi/asm/kvm.h @@ -272,8 +272,31 @@ struct kvm_debug_exit_arch { /* for KVM_SET_GUEST_DEBUG */ struct kvm_guest_debug_arch { + struct { + /* H/W breakpoint/watchpoint address */ + __u64 addr; + /* + * Type denotes h/w breakpoint, read watchpoint, write + * watchpoint or watchpoint (both read and write). + */ +#define KVMPPC_DEBUG_NONE 0x0 +#define KVMPPC_DEBUG_BREAKPOINT (1UL << 1) +#define KVMPPC_DEBUG_WATCH_WRITE (1UL << 2) +#define KVMPPC_DEBUG_WATCH_READ (1UL << 3) + __u32 type; + __u32 reserved; + } bp[16]; }; +/* Debug related defines */ +/* + * kvm_guest_debug->control is a 32 bit field. The lower 16 bits are generic + * and upper 16 bits are architecture specific. Architecture specific defines + * that ioctl is for setting hardware breakpoint or software breakpoint. + */ +#define KVM_GUESTDBG_USE_SW_BP 0x00010000 +#define KVM_GUESTDBG_USE_HW_BP 0x00020000 + /* definition of registers in kvm_run */ struct kvm_sync_regs { }; -- cgit v1.2.3 From c402a3f457b9689451c4e422781026633a5b6287 Mon Sep 17 00:00:00 2001 From: Bharat Bhushan Date: Mon, 8 Apr 2013 00:32:13 +0000 Subject: Rename EMULATE_DO_PAPR to EMULATE_EXIT_USER Instruction emulation return EMULATE_DO_PAPR when it requires exit to userspace on book3s. Similar return is required for booke. EMULATE_DO_PAPR reads out to be confusing so it is renamed to EMULATE_EXIT_USER. Signed-off-by: Bharat Bhushan Signed-off-by: Alexander Graf --- arch/powerpc/include/asm/kvm_ppc.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/powerpc/include') diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h index 4794de6ea379..bcc68b1afc66 100644 --- a/arch/powerpc/include/asm/kvm_ppc.h +++ b/arch/powerpc/include/asm/kvm_ppc.h @@ -44,7 +44,7 @@ enum emulation_result { EMULATE_DO_DCR, /* kvm_run filled with DCR request */ EMULATE_FAIL, /* can't emulate this instruction */ EMULATE_AGAIN, /* something went wrong. go again */ - EMULATE_DO_PAPR, /* kvm_run filled with PAPR request */ + EMULATE_EXIT_USER, /* emulation requires exit to user-space */ }; extern int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu); -- cgit v1.2.3 From a85d2aa23e51a9460e034e283da2513930b4f183 Mon Sep 17 00:00:00 2001 From: Mihai Caraman Date: Thu, 11 Apr 2013 00:03:08 +0000 Subject: KVM: PPC: e500: Expose MMU registers via ONE_REG MMU registers were exposed to user-space using sregs interface. Add them to ONE_REG interface using kvmppc_get_one_reg/kvmppc_set_one_reg delegation mechanism. Signed-off-by: Mihai Caraman Signed-off-by: Alexander Graf --- arch/powerpc/include/uapi/asm/kvm.h | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'arch/powerpc/include') diff --git a/arch/powerpc/include/uapi/asm/kvm.h b/arch/powerpc/include/uapi/asm/kvm.h index c0c38ed9c97d..0c5cffb6a58e 100644 --- a/arch/powerpc/include/uapi/asm/kvm.h +++ b/arch/powerpc/include/uapi/asm/kvm.h @@ -449,4 +449,21 @@ struct kvm_get_htab_header { /* Debugging: Special instruction for software breakpoint */ #define KVM_REG_PPC_DEBUG_INST (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x8b) +/* MMU registers */ +#define KVM_REG_PPC_MAS0 (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x8c) +#define KVM_REG_PPC_MAS1 (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x8d) +#define KVM_REG_PPC_MAS2 (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0x8e) +#define KVM_REG_PPC_MAS7_3 (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0x8f) +#define KVM_REG_PPC_MAS4 (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x90) +#define KVM_REG_PPC_MAS6 (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x91) +#define KVM_REG_PPC_MMUCFG (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x92) +/* + * TLBnCFG fields TLBnCFG_N_ENTRY and TLBnCFG_ASSOC can be changed only using + * KVM_CAP_SW_TLB ioctl + */ +#define KVM_REG_PPC_TLB0CFG (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x93) +#define KVM_REG_PPC_TLB1CFG (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x94) +#define KVM_REG_PPC_TLB2CFG (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x95) +#define KVM_REG_PPC_TLB3CFG (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x96) + #endif /* __LINUX_KVM_POWERPC_H */ -- cgit v1.2.3 From 307d9008ed4f28920e0e78719e10d0f407341e00 Mon Sep 17 00:00:00 2001 From: Mihai Caraman Date: Thu, 11 Apr 2013 00:03:10 +0000 Subject: KVM: PPC: e500: Add support for TLBnPS registers Add support for TLBnPS registers available in MMU Architecture Version (MAV) 2.0. Signed-off-by: Mihai Caraman Signed-off-by: Alexander Graf --- arch/powerpc/include/asm/kvm_host.h | 1 + arch/powerpc/include/uapi/asm/kvm.h | 4 ++++ 2 files changed, 5 insertions(+) (limited to 'arch/powerpc/include') diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h index e34f8fee9080..3b6cee3e33a8 100644 --- a/arch/powerpc/include/asm/kvm_host.h +++ b/arch/powerpc/include/asm/kvm_host.h @@ -502,6 +502,7 @@ struct kvm_vcpu_arch { spinlock_t wdt_lock; struct timer_list wdt_timer; u32 tlbcfg[4]; + u32 tlbps[4]; u32 mmucfg; u32 epr; u32 crit_save; diff --git a/arch/powerpc/include/uapi/asm/kvm.h b/arch/powerpc/include/uapi/asm/kvm.h index 0c5cffb6a58e..4dd36c399842 100644 --- a/arch/powerpc/include/uapi/asm/kvm.h +++ b/arch/powerpc/include/uapi/asm/kvm.h @@ -465,5 +465,9 @@ struct kvm_get_htab_header { #define KVM_REG_PPC_TLB1CFG (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x94) #define KVM_REG_PPC_TLB2CFG (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x95) #define KVM_REG_PPC_TLB3CFG (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x96) +#define KVM_REG_PPC_TLB0PS (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x97) +#define KVM_REG_PPC_TLB1PS (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x98) +#define KVM_REG_PPC_TLB2PS (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x99) +#define KVM_REG_PPC_TLB3PS (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x9a) #endif /* __LINUX_KVM_POWERPC_H */ -- cgit v1.2.3 From 9a6061d7fdedbf025549adf5c9d920d90bbf4a69 Mon Sep 17 00:00:00 2001 From: Mihai Caraman Date: Thu, 11 Apr 2013 00:03:11 +0000 Subject: KVM: PPC: e500: Add support for EPTCFG register EPTCFG register defined by E.PT is accessed unconditionally by Linux guests in the presence of MAV 2.0. Emulate it now. Signed-off-by: Mihai Caraman Signed-off-by: Alexander Graf --- arch/powerpc/include/asm/kvm_host.h | 1 + arch/powerpc/include/uapi/asm/kvm.h | 1 + 2 files changed, 2 insertions(+) (limited to 'arch/powerpc/include') diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h index 3b6cee3e33a8..8a48e686a755 100644 --- a/arch/powerpc/include/asm/kvm_host.h +++ b/arch/powerpc/include/asm/kvm_host.h @@ -504,6 +504,7 @@ struct kvm_vcpu_arch { u32 tlbcfg[4]; u32 tlbps[4]; u32 mmucfg; + u32 eptcfg; u32 epr; u32 crit_save; struct kvmppc_booke_debug_reg dbg_reg; diff --git a/arch/powerpc/include/uapi/asm/kvm.h b/arch/powerpc/include/uapi/asm/kvm.h index 4dd36c399842..41d59d8bdfe8 100644 --- a/arch/powerpc/include/uapi/asm/kvm.h +++ b/arch/powerpc/include/uapi/asm/kvm.h @@ -469,5 +469,6 @@ struct kvm_get_htab_header { #define KVM_REG_PPC_TLB1PS (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x98) #define KVM_REG_PPC_TLB2PS (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x99) #define KVM_REG_PPC_TLB3PS (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x9a) +#define KVM_REG_PPC_EPTCFG (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x9b) #endif /* __LINUX_KVM_POWERPC_H */ -- cgit v1.2.3 From a1b4a0f6064aacad0d708105e6f60a06e93fbf37 Mon Sep 17 00:00:00 2001 From: Paul Mackerras Date: Thu, 18 Apr 2013 19:50:24 +0000 Subject: KVM: PPC: Book3S HV: Make HPT reading code notice R/C bit changes At present, the code that determines whether a HPT entry has changed, and thus needs to be sent to userspace when it is copying the HPT, doesn't consider a hardware update to the reference and change bits (R and C) in the HPT entries to constitute a change that needs to be sent to userspace. This adds code to check for changes in R and C when we are scanning the HPT to find changed entries, and adds code to set the changed flag for the HPTE when we update the R and C bits in the guest view of the HPTE. Since we now need to set the HPTE changed flag in book3s_64_mmu_hv.c as well as book3s_hv_rm_mmu.c, we move the note_hpte_modification() function into kvm_book3s_64.h. Current Linux guest kernels don't use the hardware updates of R and C in the HPT, so this change won't affect them. Linux (or other) kernels might in future want to use the R and C bits and have them correctly transferred across when a guest is migrated, so it is better to correct this deficiency. Signed-off-by: Paul Mackerras Signed-off-by: Alexander Graf --- arch/powerpc/include/asm/kvm_book3s_64.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'arch/powerpc/include') diff --git a/arch/powerpc/include/asm/kvm_book3s_64.h b/arch/powerpc/include/asm/kvm_book3s_64.h index 38bec1dc9928..9c1ff330c805 100644 --- a/arch/powerpc/include/asm/kvm_book3s_64.h +++ b/arch/powerpc/include/asm/kvm_book3s_64.h @@ -268,4 +268,17 @@ static inline int is_vrma_hpte(unsigned long hpte_v) (HPTE_V_1TB_SEG | (VRMA_VSID << (40 - 16))); } +#ifdef CONFIG_KVM_BOOK3S_64_HV +/* + * Note modification of an HPTE; set the HPTE modified bit + * if anyone is interested. + */ +static inline void note_hpte_modification(struct kvm *kvm, + struct revmap_entry *rev) +{ + if (atomic_read(&kvm->arch.hpte_mod_interest)) + rev->guest_rpte |= HPTE_GR_MODIFIED; +} +#endif /* CONFIG_KVM_BOOK3S_64_HV */ + #endif /* __ASM_KVM_BOOK3S_64_H__ */ -- cgit v1.2.3 From c35635efdc0312e013ebda1c8f3b5dd038c0d0e7 Mon Sep 17 00:00:00 2001 From: Paul Mackerras Date: Thu, 18 Apr 2013 19:51:04 +0000 Subject: KVM: PPC: Book3S HV: Report VPA and DTL modifications in dirty map At present, the KVM_GET_DIRTY_LOG ioctl doesn't report modifications done by the host to the virtual processor areas (VPAs) and dispatch trace logs (DTLs) registered by the guest. This is because those modifications are done either in real mode or in the host kernel context, and in neither case does the access go through the guest's HPT, and thus no change (C) bit gets set in the guest's HPT. However, the changes done by the host do need to be tracked so that the modified pages get transferred when doing live migration. In order to track these modifications, this adds a dirty flag to the struct representing the VPA/DTL areas, and arranges to set the flag when the VPA/DTL gets modified by the host. Then, when we are collecting the dirty log, we also check the dirty flags for the VPA and DTL for each vcpu and set the relevant bit in the dirty log if necessary. Doing this also means we now need to keep track of the guest physical address of the VPA/DTL areas. So as not to lose track of modifications to a VPA/DTL area when it gets unregistered, or when a new area gets registered in its place, we need to transfer the dirty state to the rmap chain. This adds code to kvmppc_unpin_guest_page() to do that if the area was dirty. To simplify that code, we now require that all VPA, DTL and SLB shadow buffer areas fit within a single host page. Guests already comply with this requirement because pHyp requires that these areas not cross a 4k boundary. Signed-off-by: Paul Mackerras Signed-off-by: Alexander Graf --- arch/powerpc/include/asm/kvm_book3s.h | 3 ++- arch/powerpc/include/asm/kvm_host.h | 2 ++ 2 files changed, 4 insertions(+), 1 deletion(-) (limited to 'arch/powerpc/include') diff --git a/arch/powerpc/include/asm/kvm_book3s.h b/arch/powerpc/include/asm/kvm_book3s.h index bc81842ea25a..c55f7e6affaa 100644 --- a/arch/powerpc/include/asm/kvm_book3s.h +++ b/arch/powerpc/include/asm/kvm_book3s.h @@ -156,7 +156,8 @@ void kvmppc_clear_ref_hpte(struct kvm *kvm, unsigned long *hptep, unsigned long pte_index); extern void *kvmppc_pin_guest_page(struct kvm *kvm, unsigned long addr, unsigned long *nb_ret); -extern void kvmppc_unpin_guest_page(struct kvm *kvm, void *addr); +extern void kvmppc_unpin_guest_page(struct kvm *kvm, void *addr, + unsigned long gpa, bool dirty); extern long kvmppc_virtmode_h_enter(struct kvm_vcpu *vcpu, unsigned long flags, long pte_index, unsigned long pteh, unsigned long ptel); extern long kvmppc_do_h_enter(struct kvm *kvm, unsigned long flags, diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h index 8a48e686a755..1443768a6588 100644 --- a/arch/powerpc/include/asm/kvm_host.h +++ b/arch/powerpc/include/asm/kvm_host.h @@ -301,11 +301,13 @@ struct kvmppc_vcore { * that a guest can register. */ struct kvmppc_vpa { + unsigned long gpa; /* Current guest phys addr */ void *pinned_addr; /* Address in kernel linear mapping */ void *pinned_end; /* End of region */ unsigned long next_gpa; /* Guest phys addr for update */ unsigned long len; /* Number of bytes required */ u8 update_pending; /* 1 => update pinned_addr from next_gpa */ + bool dirty; /* true => area has been modified by kernel */ }; struct kvmppc_pte { -- cgit v1.2.3 From 5df554ad5b7522ea62b0ff9d5be35183494efc21 Mon Sep 17 00:00:00 2001 From: Scott Wood Date: Fri, 12 Apr 2013 14:08:46 +0000 Subject: kvm/ppc/mpic: in-kernel MPIC emulation Hook the MPIC code up to the KVM interfaces, add locking, etc. Signed-off-by: Scott Wood [agraf: add stub function for kvmppc_mpic_set_epr, non-booke, 64bit] Signed-off-by: Alexander Graf --- arch/powerpc/include/asm/kvm_host.h | 8 +++++++- arch/powerpc/include/asm/kvm_ppc.h | 17 +++++++++++++++++ arch/powerpc/include/uapi/asm/kvm.h | 8 ++++++++ 3 files changed, 32 insertions(+), 1 deletion(-) (limited to 'arch/powerpc/include') diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h index 1443768a6588..153c8c2b0f88 100644 --- a/arch/powerpc/include/asm/kvm_host.h +++ b/arch/powerpc/include/asm/kvm_host.h @@ -361,6 +361,11 @@ struct kvmppc_slb { #define KVMPPC_BOOKE_MAX_IAC 4 #define KVMPPC_BOOKE_MAX_DAC 2 +/* KVMPPC_EPR_USER takes precedence over KVMPPC_EPR_KERNEL */ +#define KVMPPC_EPR_NONE 0 /* EPR not supported */ +#define KVMPPC_EPR_USER 1 /* exit to userspace to fill EPR */ +#define KVMPPC_EPR_KERNEL 2 /* in-kernel irqchip */ + struct kvmppc_booke_debug_reg { u32 dbcr0; u32 dbcr1; @@ -526,7 +531,7 @@ struct kvm_vcpu_arch { u8 sane; u8 cpu_type; u8 hcall_needed; - u8 epr_enabled; + u8 epr_flags; /* KVMPPC_EPR_xxx */ u8 epr_needed; u32 cpr0_cfgaddr; /* holds the last set cpr0_cfgaddr */ @@ -593,5 +598,6 @@ struct kvm_vcpu_arch { #define KVM_MMIO_REG_FQPR 0x0060 #define __KVM_HAVE_ARCH_WQP +#define __KVM_HAVE_CREATE_DEVICE #endif /* __POWERPC_KVM_HOST_H__ */ diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h index bcc68b1afc66..3810f9c7616c 100644 --- a/arch/powerpc/include/asm/kvm_ppc.h +++ b/arch/powerpc/include/asm/kvm_ppc.h @@ -164,6 +164,8 @@ extern int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu); extern int kvm_vm_ioctl_get_htab_fd(struct kvm *kvm, struct kvm_get_htab_fd *); +int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq); + /* * Cuts out inst bits with ordering according to spec. * That means the leftmost bit is zero. All given bits are included. @@ -245,6 +247,9 @@ int kvmppc_set_one_reg(struct kvm_vcpu *vcpu, u64 id, union kvmppc_one_reg *); void kvmppc_set_pid(struct kvm_vcpu *vcpu, u32 pid); +struct openpic; +void kvmppc_mpic_put(struct openpic *opp); + #ifdef CONFIG_KVM_BOOK3S_64_HV static inline void kvmppc_set_xics_phys(int cpu, unsigned long addr) { @@ -270,6 +275,18 @@ static inline void kvmppc_set_epr(struct kvm_vcpu *vcpu, u32 epr) #endif } +#ifdef CONFIG_KVM_MPIC + +void kvmppc_mpic_set_epr(struct kvm_vcpu *vcpu); + +#else + +static inline void kvmppc_mpic_set_epr(struct kvm_vcpu *vcpu) +{ +} + +#endif /* CONFIG_KVM_MPIC */ + int kvm_vcpu_ioctl_config_tlb(struct kvm_vcpu *vcpu, struct kvm_config_tlb *cfg); int kvm_vcpu_ioctl_dirty_tlb(struct kvm_vcpu *vcpu, diff --git a/arch/powerpc/include/uapi/asm/kvm.h b/arch/powerpc/include/uapi/asm/kvm.h index 41d59d8bdfe8..02ad96606860 100644 --- a/arch/powerpc/include/uapi/asm/kvm.h +++ b/arch/powerpc/include/uapi/asm/kvm.h @@ -382,6 +382,14 @@ struct kvm_get_htab_header { __u16 n_invalid; }; +/* Device control API: PPC-specific devices */ +#define KVM_DEV_MPIC_GRP_MISC 1 +#define KVM_DEV_MPIC_BASE_ADDR 0 /* 64-bit */ + +#define KVM_DEV_MPIC_GRP_REGISTER 2 /* 32-bit */ +#define KVM_DEV_MPIC_GRP_IRQ_ACTIVE 3 /* 32-bit */ + +/* One-Reg API: PPC-specific registers */ #define KVM_REG_PPC_HIOR (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0x1) #define KVM_REG_PPC_IAC1 (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0x2) #define KVM_REG_PPC_IAC2 (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0x3) -- cgit v1.2.3 From eb1e4f43e0f47f2655372c7d32c43db9711c278e Mon Sep 17 00:00:00 2001 From: Scott Wood Date: Fri, 12 Apr 2013 14:08:47 +0000 Subject: kvm/ppc/mpic: add KVM_CAP_IRQ_MPIC Enabling this capability connects the vcpu to the designated in-kernel MPIC. Using explicit connections between vcpus and irqchips allows for flexibility, but the main benefit at the moment is that it simplifies the code -- KVM doesn't need vm-global state to remember which MPIC object is associated with this vm, and it doesn't need to care about ordering between irqchip creation and vcpu creation. Signed-off-by: Scott Wood [agraf: add stub functions for kvmppc_mpic_{dis,}connect_vcpu] Signed-off-by: Alexander Graf --- arch/powerpc/include/asm/kvm_host.h | 9 +++++++++ arch/powerpc/include/asm/kvm_ppc.h | 15 ++++++++++++++- 2 files changed, 23 insertions(+), 1 deletion(-) (limited to 'arch/powerpc/include') diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h index 153c8c2b0f88..c3f8ceffa412 100644 --- a/arch/powerpc/include/asm/kvm_host.h +++ b/arch/powerpc/include/asm/kvm_host.h @@ -377,6 +377,11 @@ struct kvmppc_booke_debug_reg { u64 dac[KVMPPC_BOOKE_MAX_DAC]; }; +#define KVMPPC_IRQ_DEFAULT 0 +#define KVMPPC_IRQ_MPIC 1 + +struct openpic; + struct kvm_vcpu_arch { ulong host_stack; u32 host_pid; @@ -558,6 +563,10 @@ struct kvm_vcpu_arch { unsigned long magic_page_pa; /* phys addr to map the magic page to */ unsigned long magic_page_ea; /* effect. addr to map the magic page to */ + int irq_type; /* one of KVM_IRQ_* */ + int irq_cpu_id; + struct openpic *mpic; /* KVM_IRQ_MPIC */ + #ifdef CONFIG_KVM_BOOK3S_64_HV struct kvm_vcpu_arch_shared shregs; diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h index 3810f9c7616c..df9c80b37905 100644 --- a/arch/powerpc/include/asm/kvm_ppc.h +++ b/arch/powerpc/include/asm/kvm_ppc.h @@ -248,7 +248,6 @@ int kvmppc_set_one_reg(struct kvm_vcpu *vcpu, u64 id, union kvmppc_one_reg *); void kvmppc_set_pid(struct kvm_vcpu *vcpu, u32 pid); struct openpic; -void kvmppc_mpic_put(struct openpic *opp); #ifdef CONFIG_KVM_BOOK3S_64_HV static inline void kvmppc_set_xics_phys(int cpu, unsigned long addr) @@ -278,6 +277,9 @@ static inline void kvmppc_set_epr(struct kvm_vcpu *vcpu, u32 epr) #ifdef CONFIG_KVM_MPIC void kvmppc_mpic_set_epr(struct kvm_vcpu *vcpu); +int kvmppc_mpic_connect_vcpu(struct kvm_device *dev, struct kvm_vcpu *vcpu, + u32 cpu); +void kvmppc_mpic_disconnect_vcpu(struct openpic *opp, struct kvm_vcpu *vcpu); #else @@ -285,6 +287,17 @@ static inline void kvmppc_mpic_set_epr(struct kvm_vcpu *vcpu) { } +static inline int kvmppc_mpic_connect_vcpu(struct kvm_device *dev, + struct kvm_vcpu *vcpu, u32 cpu) +{ + return -EINVAL; +} + +static inline void kvmppc_mpic_disconnect_vcpu(struct openpic *opp, + struct kvm_vcpu *vcpu) +{ +} + #endif /* CONFIG_KVM_MPIC */ int kvm_vcpu_ioctl_config_tlb(struct kvm_vcpu *vcpu, -- cgit v1.2.3 From de9ba2f36368d21314860ee24893a6ffef01e548 Mon Sep 17 00:00:00 2001 From: Alexander Graf Date: Tue, 16 Apr 2013 17:42:19 +0200 Subject: KVM: PPC: Support irq routing and irqfd for in-kernel MPIC Now that all the irq routing and irqfd pieces are generic, we can expose real irqchip support to all of KVM's internal helpers. This allows us to use irqfd with the in-kernel MPIC. Signed-off-by: Alexander Graf --- arch/powerpc/include/asm/kvm_host.h | 7 +++++++ arch/powerpc/include/uapi/asm/kvm.h | 1 + 2 files changed, 8 insertions(+) (limited to 'arch/powerpc/include') diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h index c3f8ceffa412..13740a645a6d 100644 --- a/arch/powerpc/include/asm/kvm_host.h +++ b/arch/powerpc/include/asm/kvm_host.h @@ -44,6 +44,10 @@ #define KVM_COALESCED_MMIO_PAGE_OFFSET 1 #endif +/* These values are internal and can be increased later */ +#define KVM_NR_IRQCHIPS 1 +#define KVM_IRQCHIP_NUM_PINS 256 + #if !defined(CONFIG_KVM_440) #include @@ -256,6 +260,9 @@ struct kvm_arch { #ifdef CONFIG_PPC_BOOK3S_64 struct list_head spapr_tce_tables; #endif +#ifdef CONFIG_KVM_MPIC + struct openpic *mpic; +#endif }; /* diff --git a/arch/powerpc/include/uapi/asm/kvm.h b/arch/powerpc/include/uapi/asm/kvm.h index 02ad96606860..ca871067a69b 100644 --- a/arch/powerpc/include/uapi/asm/kvm.h +++ b/arch/powerpc/include/uapi/asm/kvm.h @@ -25,6 +25,7 @@ /* Select powerpc specific features in */ #define __KVM_HAVE_SPAPR_TCE #define __KVM_HAVE_PPC_SMT +#define __KVM_HAVE_IRQCHIP struct kvm_regs { __u64 pc; -- cgit v1.2.3 From 5efdb4be598fc2af6937c3387586635ddf6fd2c8 Mon Sep 17 00:00:00 2001 From: Alexander Graf Date: Wed, 17 Apr 2013 00:37:57 +0200 Subject: KVM: PPC: MPIC: Add support for KVM_IRQ_LINE Now that all pieces are in place for reusing generic irq infrastructure, we can copy x86's implementation of KVM_IRQ_LINE irq injection and simply reuse it for PPC, as it will work there just as well. Signed-off-by: Alexander Graf --- arch/powerpc/include/uapi/asm/kvm.h | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/powerpc/include') diff --git a/arch/powerpc/include/uapi/asm/kvm.h b/arch/powerpc/include/uapi/asm/kvm.h index ca871067a69b..03c7819a44a3 100644 --- a/arch/powerpc/include/uapi/asm/kvm.h +++ b/arch/powerpc/include/uapi/asm/kvm.h @@ -26,6 +26,7 @@ #define __KVM_HAVE_SPAPR_TCE #define __KVM_HAVE_PPC_SMT #define __KVM_HAVE_IRQCHIP +#define __KVM_HAVE_IRQ_LINE struct kvm_regs { __u64 pc; -- cgit v1.2.3 From 8e591cb7204739efa8e15967ea334eb367039dde Mon Sep 17 00:00:00 2001 From: Michael Ellerman Date: Wed, 17 Apr 2013 20:30:00 +0000 Subject: KVM: PPC: Book3S: Add infrastructure to implement kernel-side RTAS calls For pseries machine emulation, in order to move the interrupt controller code to the kernel, we need to intercept some RTAS calls in the kernel itself. This adds an infrastructure to allow in-kernel handlers to be registered for RTAS services by name. A new ioctl, KVM_PPC_RTAS_DEFINE_TOKEN, then allows userspace to associate token values with those service names. Then, when the guest requests an RTAS service with one of those token values, it will be handled by the relevant in-kernel handler rather than being passed up to userspace as at present. Signed-off-by: Michael Ellerman Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Paul Mackerras [agraf: fix warning] Signed-off-by: Alexander Graf --- arch/powerpc/include/asm/hvcall.h | 3 +++ arch/powerpc/include/asm/kvm_host.h | 1 + arch/powerpc/include/asm/kvm_ppc.h | 4 ++++ arch/powerpc/include/uapi/asm/kvm.h | 6 ++++++ 4 files changed, 14 insertions(+) (limited to 'arch/powerpc/include') diff --git a/arch/powerpc/include/asm/hvcall.h b/arch/powerpc/include/asm/hvcall.h index 4bc2c3dad6ad..cf4df8e2139a 100644 --- a/arch/powerpc/include/asm/hvcall.h +++ b/arch/powerpc/include/asm/hvcall.h @@ -270,6 +270,9 @@ #define H_SET_MODE 0x31C #define MAX_HCALL_OPCODE H_SET_MODE +/* Platform specific hcalls, used by KVM */ +#define H_RTAS 0xf000 + #ifndef __ASSEMBLY__ /** diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h index 13740a645a6d..311f7e6f09e9 100644 --- a/arch/powerpc/include/asm/kvm_host.h +++ b/arch/powerpc/include/asm/kvm_host.h @@ -259,6 +259,7 @@ struct kvm_arch { #endif /* CONFIG_KVM_BOOK3S_64_HV */ #ifdef CONFIG_PPC_BOOK3S_64 struct list_head spapr_tce_tables; + struct list_head rtas_tokens; #endif #ifdef CONFIG_KVM_MPIC struct openpic *mpic; diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h index df9c80b37905..8a30eb7f2bec 100644 --- a/arch/powerpc/include/asm/kvm_ppc.h +++ b/arch/powerpc/include/asm/kvm_ppc.h @@ -166,6 +166,10 @@ extern int kvm_vm_ioctl_get_htab_fd(struct kvm *kvm, struct kvm_get_htab_fd *); int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq); +extern int kvm_vm_ioctl_rtas_define_token(struct kvm *kvm, void __user *argp); +extern int kvmppc_rtas_hcall(struct kvm_vcpu *vcpu); +extern void kvmppc_rtas_tokens_free(struct kvm *kvm); + /* * Cuts out inst bits with ordering according to spec. * That means the leftmost bit is zero. All given bits are included. diff --git a/arch/powerpc/include/uapi/asm/kvm.h b/arch/powerpc/include/uapi/asm/kvm.h index 03c7819a44a3..eb9e25c194ad 100644 --- a/arch/powerpc/include/uapi/asm/kvm.h +++ b/arch/powerpc/include/uapi/asm/kvm.h @@ -324,6 +324,12 @@ struct kvm_allocate_rma { __u64 rma_size; }; +/* for KVM_CAP_PPC_RTAS */ +struct kvm_rtas_token_args { + char name[120]; + __u64 token; /* Use a token of 0 to undefine a mapping */ +}; + struct kvm_book3e_206_tlb_entry { __u32 mas8; __u32 mas1; -- cgit v1.2.3 From bc5ad3f3701116e7db57268e6f89010ec714697e Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Wed, 17 Apr 2013 20:30:26 +0000 Subject: KVM: PPC: Book3S: Add kernel emulation for the XICS interrupt controller This adds in-kernel emulation of the XICS (eXternal Interrupt Controller Specification) interrupt controller specified by PAPR, for both HV and PR KVM guests. The XICS emulation supports up to 1048560 interrupt sources. Interrupt source numbers below 16 are reserved; 0 is used to mean no interrupt and 2 is used for IPIs. Internally these are represented in blocks of 1024, called ICS (interrupt controller source) entities, but that is not visible to userspace. Each vcpu gets one ICP (interrupt controller presentation) entity, used to store the per-vcpu state such as vcpu priority, pending interrupt state, IPI request, etc. This does not include any API or any way to connect vcpus to their ICP state; that will be added in later patches. This is based on an initial implementation by Michael Ellerman reworked by Benjamin Herrenschmidt and Paul Mackerras. Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Paul Mackerras [agraf: fix typo, add dependency on !KVM_MPIC] Signed-off-by: Alexander Graf --- arch/powerpc/include/asm/kvm_book3s.h | 2 ++ arch/powerpc/include/asm/kvm_host.h | 11 +++++++++++ arch/powerpc/include/asm/kvm_ppc.h | 29 +++++++++++++++++++++++++++++ 3 files changed, 42 insertions(+) (limited to 'arch/powerpc/include') diff --git a/arch/powerpc/include/asm/kvm_book3s.h b/arch/powerpc/include/asm/kvm_book3s.h index c55f7e6affaa..349ed85c7d61 100644 --- a/arch/powerpc/include/asm/kvm_book3s.h +++ b/arch/powerpc/include/asm/kvm_book3s.h @@ -142,6 +142,8 @@ extern int kvmppc_mmu_hv_init(void); extern int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr, bool data); extern int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr, bool data); extern void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec); +extern void kvmppc_book3s_dequeue_irqprio(struct kvm_vcpu *vcpu, + unsigned int vec); extern void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags); extern void kvmppc_set_bat(struct kvm_vcpu *vcpu, struct kvmppc_bat *bat, bool upper, u32 val); diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h index 311f7e6f09e9..af326cde7cb6 100644 --- a/arch/powerpc/include/asm/kvm_host.h +++ b/arch/powerpc/include/asm/kvm_host.h @@ -192,6 +192,10 @@ struct kvmppc_linear_info { int type; }; +/* XICS components, defined in book3s_xics.c */ +struct kvmppc_xics; +struct kvmppc_icp; + /* * The reverse mapping array has one entry for each HPTE, * which stores the guest's view of the second word of the HPTE @@ -264,6 +268,9 @@ struct kvm_arch { #ifdef CONFIG_KVM_MPIC struct openpic *mpic; #endif +#ifdef CONFIG_KVM_XICS + struct kvmppc_xics *xics; +#endif }; /* @@ -387,6 +394,7 @@ struct kvmppc_booke_debug_reg { #define KVMPPC_IRQ_DEFAULT 0 #define KVMPPC_IRQ_MPIC 1 +#define KVMPPC_IRQ_XICS 2 struct openpic; @@ -574,6 +582,9 @@ struct kvm_vcpu_arch { int irq_type; /* one of KVM_IRQ_* */ int irq_cpu_id; struct openpic *mpic; /* KVM_IRQ_MPIC */ +#ifdef CONFIG_KVM_XICS + struct kvmppc_icp *icp; /* XICS presentation controller */ +#endif #ifdef CONFIG_KVM_BOOK3S_64_HV struct kvm_vcpu_arch_shared shregs; diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h index 8a30eb7f2bec..6582eed321ba 100644 --- a/arch/powerpc/include/asm/kvm_ppc.h +++ b/arch/powerpc/include/asm/kvm_ppc.h @@ -130,6 +130,7 @@ extern long kvmppc_prepare_vrma(struct kvm *kvm, extern void kvmppc_map_vrma(struct kvm_vcpu *vcpu, struct kvm_memory_slot *memslot, unsigned long porder); extern int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu); + extern long kvm_vm_ioctl_create_spapr_tce(struct kvm *kvm, struct kvm_create_spapr_tce *args); extern long kvmppc_h_put_tce(struct kvm_vcpu *vcpu, unsigned long liobn, @@ -169,6 +170,10 @@ int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq); extern int kvm_vm_ioctl_rtas_define_token(struct kvm *kvm, void __user *argp); extern int kvmppc_rtas_hcall(struct kvm_vcpu *vcpu); extern void kvmppc_rtas_tokens_free(struct kvm *kvm); +extern int kvmppc_xics_set_xive(struct kvm *kvm, u32 irq, u32 server, + u32 priority); +extern int kvmppc_xics_get_xive(struct kvm *kvm, u32 irq, u32 *server, + u32 *priority); /* * Cuts out inst bits with ordering according to spec. @@ -267,6 +272,30 @@ static inline void kvmppc_set_xics_phys(int cpu, unsigned long addr) static inline void kvm_linear_init(void) {} + +#endif + +#ifdef CONFIG_KVM_XICS +static inline int kvmppc_xics_enabled(struct kvm_vcpu *vcpu) +{ + return vcpu->arch.irq_type == KVMPPC_IRQ_XICS; +} +extern void kvmppc_xics_free_icp(struct kvm_vcpu *vcpu); +extern int kvmppc_xics_create_icp(struct kvm_vcpu *vcpu, unsigned long server); +extern int kvm_vm_ioctl_xics_irq(struct kvm *kvm, struct kvm_irq_level *args); +extern int kvmppc_xics_hcall(struct kvm_vcpu *vcpu, u32 cmd); +#else +static inline int kvmppc_xics_enabled(struct kvm_vcpu *vcpu) + { return 0; } +static inline void kvmppc_xics_free_icp(struct kvm_vcpu *vcpu) { } +static inline int kvmppc_xics_create_icp(struct kvm_vcpu *vcpu, + unsigned long server) + { return -EINVAL; } +static inline int kvm_vm_ioctl_xics_irq(struct kvm *kvm, + struct kvm_irq_level *args) + { return -ENOTTY; } +static inline int kvmppc_xics_hcall(struct kvm_vcpu *vcpu, u32 cmd) + { return 0; } #endif static inline void kvmppc_set_epr(struct kvm_vcpu *vcpu, u32 epr) -- cgit v1.2.3 From 54695c3088a74e25474db8eb6b490b45d1aeb0ca Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Wed, 17 Apr 2013 20:30:50 +0000 Subject: KVM: PPC: Book3S HV: Speed up wakeups of CPUs on HV KVM Currently, we wake up a CPU by sending a host IPI with smp_send_reschedule() to thread 0 of that core, which will take all threads out of the guest, and cause them to re-evaluate their interrupt status on the way back in. This adds a mechanism to differentiate real host IPIs from IPIs sent by KVM for guest threads to poke each other, in order to target the guest threads precisely when possible and avoid that global switch of the core to host state. We then use this new facility in the in-kernel XICS code. Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Paul Mackerras Signed-off-by: Alexander Graf --- arch/powerpc/include/asm/kvm_book3s_asm.h | 8 +++++++- arch/powerpc/include/asm/kvm_ppc.h | 29 +++++++++++++++++++++++++++++ 2 files changed, 36 insertions(+), 1 deletion(-) (limited to 'arch/powerpc/include') diff --git a/arch/powerpc/include/asm/kvm_book3s_asm.h b/arch/powerpc/include/asm/kvm_book3s_asm.h index cdc3d2717cc6..9039d3c97eec 100644 --- a/arch/powerpc/include/asm/kvm_book3s_asm.h +++ b/arch/powerpc/include/asm/kvm_book3s_asm.h @@ -20,6 +20,11 @@ #ifndef __ASM_KVM_BOOK3S_ASM_H__ #define __ASM_KVM_BOOK3S_ASM_H__ +/* XICS ICP register offsets */ +#define XICS_XIRR 4 +#define XICS_MFRR 0xc +#define XICS_IPI 2 /* interrupt source # for IPIs */ + #ifdef __ASSEMBLY__ #ifdef CONFIG_KVM_BOOK3S_HANDLER @@ -81,10 +86,11 @@ struct kvmppc_host_state { #ifdef CONFIG_KVM_BOOK3S_64_HV u8 hwthread_req; u8 hwthread_state; - + u8 host_ipi; struct kvm_vcpu *kvm_vcpu; struct kvmppc_vcore *kvm_vcore; unsigned long xics_phys; + u32 saved_xirr; u64 dabr; u64 host_mmcr[3]; u32 host_pmc[8]; diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h index 6582eed321ba..1589fd8bf063 100644 --- a/arch/powerpc/include/asm/kvm_ppc.h +++ b/arch/powerpc/include/asm/kvm_ppc.h @@ -264,6 +264,21 @@ static inline void kvmppc_set_xics_phys(int cpu, unsigned long addr) paca[cpu].kvm_hstate.xics_phys = addr; } +static inline u32 kvmppc_get_xics_latch(void) +{ + u32 xirr = get_paca()->kvm_hstate.saved_xirr; + + get_paca()->kvm_hstate.saved_xirr = 0; + + return xirr; +} + +static inline void kvmppc_set_host_ipi(int cpu, u8 host_ipi) +{ + paca[cpu].kvm_hstate.host_ipi = host_ipi; +} + +extern void kvmppc_fast_vcpu_kick(struct kvm_vcpu *vcpu); extern void kvm_linear_init(void); #else @@ -273,6 +288,18 @@ static inline void kvmppc_set_xics_phys(int cpu, unsigned long addr) static inline void kvm_linear_init(void) {} +static inline u32 kvmppc_get_xics_latch(void) +{ + return 0; +} + +static inline void kvmppc_set_host_ipi(int cpu, u8 host_ipi) +{} + +static inline void kvmppc_fast_vcpu_kick(struct kvm_vcpu *vcpu) +{ + kvm_vcpu_kick(vcpu); +} #endif #ifdef CONFIG_KVM_XICS @@ -393,4 +420,6 @@ static inline ulong kvmppc_get_ea_indexed(struct kvm_vcpu *vcpu, int ra, int rb) return ea; } +extern void xics_wake_cpu(int cpu); + #endif /* __POWERPC_KVM_PPC_H__ */ -- cgit v1.2.3 From 4619ac88b72c43c622ef1eae3069de0e6f2cba9d Mon Sep 17 00:00:00 2001 From: Paul Mackerras Date: Wed, 17 Apr 2013 20:31:41 +0000 Subject: KVM: PPC: Book3S HV: Improve real-mode handling of external interrupts This streamlines our handling of external interrupts that come in while we're in the guest. First, when waking up a hardware thread that was napping, we split off the "napping due to H_CEDE" case earlier, and use the code that handles an external interrupt (0x500) in the guest to handle that too. Secondly, the code that handles those external interrupts now checks if any other thread is exiting to the host before bouncing an external interrupt to the guest, and also checks that there is actually an external interrupt pending for the guest before setting the LPCR MER bit (mediated external request). This also makes sure that we clear the "ceded" flag when we handle a wakeup from cede in real mode, and fixes a potential infinite loop in kvmppc_run_vcpu() which can occur if we ever end up with the ceded flag set but MSR[EE] off. Signed-off-by: Paul Mackerras Signed-off-by: Alexander Graf --- arch/powerpc/include/asm/reg.h | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/powerpc/include') diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h index c9c67fc888c9..799322433620 100644 --- a/arch/powerpc/include/asm/reg.h +++ b/arch/powerpc/include/asm/reg.h @@ -290,6 +290,7 @@ #define LPCR_PECE1 0x00002000 /* decrementer can cause exit */ #define LPCR_PECE2 0x00001000 /* machine check etc can cause exit */ #define LPCR_MER 0x00000800 /* Mediated External Exception */ +#define LPCR_MER_SH 11 #define LPCR_LPES 0x0000000c #define LPCR_LPES0 0x00000008 /* LPAR Env selector 0 */ #define LPCR_LPES1 0x00000004 /* LPAR Env selector 1 */ -- cgit v1.2.3 From d19bd86204f85d42873e07bb64a27587fc380b5b Mon Sep 17 00:00:00 2001 From: Paul Mackerras Date: Wed, 17 Apr 2013 20:32:04 +0000 Subject: KVM: PPC: Book3S: Add support for ibm,int-on/off RTAS calls This adds support for the ibm,int-on and ibm,int-off RTAS calls to the in-kernel XICS emulation and corrects the handling of the saved priority by the ibm,set-xive RTAS call. With this, ibm,int-off sets the specified interrupt's priority in its saved_priority field and sets the priority to 0xff (the least favoured value). ibm,int-on restores the saved_priority to the priority field, and ibm,set-xive sets both the priority and the saved_priority to the specified priority value. Signed-off-by: Paul Mackerras Signed-off-by: Alexander Graf --- arch/powerpc/include/asm/kvm_ppc.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'arch/powerpc/include') diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h index 1589fd8bf063..cfaa47995c0e 100644 --- a/arch/powerpc/include/asm/kvm_ppc.h +++ b/arch/powerpc/include/asm/kvm_ppc.h @@ -174,6 +174,8 @@ extern int kvmppc_xics_set_xive(struct kvm *kvm, u32 irq, u32 server, u32 priority); extern int kvmppc_xics_get_xive(struct kvm *kvm, u32 irq, u32 *server, u32 *priority); +extern int kvmppc_xics_int_on(struct kvm *kvm, u32 irq); +extern int kvmppc_xics_int_off(struct kvm *kvm, u32 irq); /* * Cuts out inst bits with ordering according to spec. -- cgit v1.2.3 From 8b78645c93b5d469e8006d68dbc92edc2640c654 Mon Sep 17 00:00:00 2001 From: Paul Mackerras Date: Wed, 17 Apr 2013 20:32:26 +0000 Subject: KVM: PPC: Book3S: Facilities to save/restore XICS presentation ctrler state This adds the ability for userspace to save and restore the state of the XICS interrupt presentation controllers (ICPs) via the KVM_GET/SET_ONE_REG interface. Since there is one ICP per vcpu, we simply define a new 64-bit register in the ONE_REG space for the ICP state. The state includes the CPU priority setting, the pending IPI priority, and the priority and source number of any pending external interrupt. Signed-off-by: Paul Mackerras Signed-off-by: Alexander Graf --- arch/powerpc/include/asm/kvm_ppc.h | 2 ++ arch/powerpc/include/uapi/asm/kvm.h | 12 ++++++++++++ 2 files changed, 14 insertions(+) (limited to 'arch/powerpc/include') diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h index cfaa47995c0e..d7339df19259 100644 --- a/arch/powerpc/include/asm/kvm_ppc.h +++ b/arch/powerpc/include/asm/kvm_ppc.h @@ -313,6 +313,8 @@ extern void kvmppc_xics_free_icp(struct kvm_vcpu *vcpu); extern int kvmppc_xics_create_icp(struct kvm_vcpu *vcpu, unsigned long server); extern int kvm_vm_ioctl_xics_irq(struct kvm *kvm, struct kvm_irq_level *args); extern int kvmppc_xics_hcall(struct kvm_vcpu *vcpu, u32 cmd); +extern u64 kvmppc_xics_get_icp(struct kvm_vcpu *vcpu); +extern int kvmppc_xics_set_icp(struct kvm_vcpu *vcpu, u64 icpval); #else static inline int kvmppc_xics_enabled(struct kvm_vcpu *vcpu) { return 0; } diff --git a/arch/powerpc/include/uapi/asm/kvm.h b/arch/powerpc/include/uapi/asm/kvm.h index eb9e25c194ad..427b9aca2a0f 100644 --- a/arch/powerpc/include/uapi/asm/kvm.h +++ b/arch/powerpc/include/uapi/asm/kvm.h @@ -390,6 +390,18 @@ struct kvm_get_htab_header { __u16 n_invalid; }; +/* Per-vcpu XICS interrupt controller state */ +#define KVM_REG_PPC_ICP_STATE (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0x8c) + +#define KVM_REG_PPC_ICP_CPPR_SHIFT 56 /* current proc priority */ +#define KVM_REG_PPC_ICP_CPPR_MASK 0xff +#define KVM_REG_PPC_ICP_XISR_SHIFT 32 /* interrupt status field */ +#define KVM_REG_PPC_ICP_XISR_MASK 0xffffff +#define KVM_REG_PPC_ICP_MFRR_SHIFT 24 /* pending IPI priority */ +#define KVM_REG_PPC_ICP_MFRR_MASK 0xff +#define KVM_REG_PPC_ICP_PPRI_SHIFT 16 /* pending irq priority */ +#define KVM_REG_PPC_ICP_PPRI_MASK 0xff + /* Device control API: PPC-specific devices */ #define KVM_DEV_MPIC_GRP_MISC 1 #define KVM_DEV_MPIC_BASE_ADDR 0 /* 64-bit */ -- cgit v1.2.3 From 5975a2e0950291a6bfe9fd5880e7952ff87764be Mon Sep 17 00:00:00 2001 From: Paul Mackerras Date: Sat, 27 Apr 2013 00:28:37 +0000 Subject: KVM: PPC: Book3S: Add API for in-kernel XICS emulation This adds the API for userspace to instantiate an XICS device in a VM and connect VCPUs to it. The API consists of a new device type for the KVM_CREATE_DEVICE ioctl, a new capability KVM_CAP_IRQ_XICS, which functions similarly to KVM_CAP_IRQ_MPIC, and the KVM_IRQ_LINE ioctl, which is used to assert and deassert interrupt inputs of the XICS. The XICS device has one attribute group, KVM_DEV_XICS_GRP_SOURCES. Each attribute within this group corresponds to the state of one interrupt source. The attribute number is the same as the interrupt source number. This does not support irq routing or irqfd yet. Signed-off-by: Paul Mackerras Acked-by: David Gibson Signed-off-by: Alexander Graf --- arch/powerpc/include/asm/kvm_ppc.h | 2 ++ arch/powerpc/include/uapi/asm/kvm.h | 12 ++++++++++++ 2 files changed, 14 insertions(+) (limited to 'arch/powerpc/include') diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h index d7339df19259..a5287fe03d77 100644 --- a/arch/powerpc/include/asm/kvm_ppc.h +++ b/arch/powerpc/include/asm/kvm_ppc.h @@ -315,6 +315,8 @@ extern int kvm_vm_ioctl_xics_irq(struct kvm *kvm, struct kvm_irq_level *args); extern int kvmppc_xics_hcall(struct kvm_vcpu *vcpu, u32 cmd); extern u64 kvmppc_xics_get_icp(struct kvm_vcpu *vcpu); extern int kvmppc_xics_set_icp(struct kvm_vcpu *vcpu, u64 icpval); +extern int kvmppc_xics_connect_vcpu(struct kvm_device *dev, + struct kvm_vcpu *vcpu, u32 cpu); #else static inline int kvmppc_xics_enabled(struct kvm_vcpu *vcpu) { return 0; } diff --git a/arch/powerpc/include/uapi/asm/kvm.h b/arch/powerpc/include/uapi/asm/kvm.h index 427b9aca2a0f..0fb1a6e9ff90 100644 --- a/arch/powerpc/include/uapi/asm/kvm.h +++ b/arch/powerpc/include/uapi/asm/kvm.h @@ -499,4 +499,16 @@ struct kvm_get_htab_header { #define KVM_REG_PPC_TLB3PS (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x9a) #define KVM_REG_PPC_EPTCFG (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x9b) +/* PPC64 eXternal Interrupt Controller Specification */ +#define KVM_DEV_XICS_GRP_SOURCES 1 /* 64-bit source attributes */ + +/* Layout of 64-bit source attribute values */ +#define KVM_XICS_DESTINATION_SHIFT 0 +#define KVM_XICS_DESTINATION_MASK 0xffffffffULL +#define KVM_XICS_PRIORITY_SHIFT 32 +#define KVM_XICS_PRIORITY_MASK 0xff +#define KVM_XICS_LEVEL_SENSITIVE (1ULL << 40) +#define KVM_XICS_MASKED (1ULL << 41) +#define KVM_XICS_PENDING (1ULL << 42) + #endif /* __LINUX_KVM_POWERPC_H */ -- cgit v1.2.3