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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

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Pull KVM updates from Paolo Bonzini:
 "Small update for KVM:

  ARM:
   - lazy context-switching of FPSIMD registers on arm64
   - "split" regions for vGIC redistributor

  s390:
   - cleanups for nested
   - clock handling
   - crypto
   - storage keys
   - control register bits

  x86:
   - many bugfixes
   - implement more Hyper-V super powers
   - implement lapic_timer_advance_ns even when the LAPIC timer is
     emulated using the processor's VMX preemption timer.
   - two security-related bugfixes at the top of the branch"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (79 commits)
  kvm: fix typo in flag name
  kvm: x86: use correct privilege level for sgdt/sidt/fxsave/fxrstor access
  KVM: x86: pass kvm_vcpu to kvm_read_guest_virt and kvm_write_guest_virt_system
  KVM: x86: introduce linear_{read,write}_system
  kvm: nVMX: Enforce cpl=0 for VMX instructions
  kvm: nVMX: Add support for "VMWRITE to any supported field"
  kvm: nVMX: Restrict VMX capability MSR changes
  KVM: VMX: Optimize tscdeadline timer latency
  KVM: docs: nVMX: Remove known limitations as they do not exist now
  KVM: docs: mmu: KVM support exposing SLAT to guests
  kvm: no need to check return value of debugfs_create functions
  kvm: Make VM ioctl do valloc for some archs
  kvm: Change return type to vm_fault_t
  KVM: docs: mmu: Fix link to NPT presentation from KVM Forum 2008
  kvm: x86: Amend the KVM_GET_SUPPORTED_CPUID API documentation
  KVM: x86: hyperv: declare KVM_CAP_HYPERV_TLBFLUSH capability
  KVM: x86: hyperv: simplistic HVCALL_FLUSH_VIRTUAL_ADDRESS_{LIST,SPACE}_EX implementation
  KVM: x86: hyperv: simplistic HVCALL_FLUSH_VIRTUAL_ADDRESS_{LIST,SPACE} implementation
  KVM: introduce kvm_make_vcpus_request_mask() API
  KVM: x86: hyperv: do rep check for each hypercall separately
  ...
This commit is contained in:
Linus Torvalds
2018-06-12 11:34:04 -07:00
parent 0725d4e1b8 766d3571d8
commit b357bf6023
74 changed files with 1832 additions and 774 deletions
Download Patch File Download Diff File Expand all files Collapse all files
arch/arm64/include/asm/cpufeature.h
-29
View File
@@ -11,9 +11,7 @@
#include <asm/cpucaps.h>
#include <asm/cputype.h>
#include <asm/fpsimd.h>
#include <asm/hwcap.h>
#include <asm/sigcontext.h>
#include <asm/sysreg.h>
/*
@@ -510,33 +508,6 @@ static inline bool system_supports_sve(void)
cpus_have_const_cap(ARM64_SVE);
}
/*
* Read the pseudo-ZCR used by cpufeatures to identify the supported SVE
* vector length.
*
* Use only if SVE is present.
* This function clobbers the SVE vector length.
*/
static inline u64 read_zcr_features(void)
{
u64 zcr;
unsigned int vq_max;
/*
* Set the maximum possible VL, and write zeroes to all other
* bits to see if they stick.
*/
sve_kernel_enable(NULL);
write_sysreg_s(ZCR_ELx_LEN_MASK, SYS_ZCR_EL1);
zcr = read_sysreg_s(SYS_ZCR_EL1);
zcr &= ~(u64)ZCR_ELx_LEN_MASK; /* find sticky 1s outside LEN field */
vq_max = sve_vq_from_vl(sve_get_vl());
zcr |= vq_max - 1; /* set LEN field to maximum effective value */
return zcr;
}
#define ARM64_SSBD_UNKNOWN -1
#define ARM64_SSBD_FORCE_DISABLE 0
#define ARM64_SSBD_KERNEL 1
arch/arm64/include/asm/fpsimd.h
+21
View File
@@ -18,6 +18,8 @@
#include <asm/ptrace.h>
#include <asm/errno.h>
#include <asm/processor.h>
#include <asm/sigcontext.h>
#ifndef __ASSEMBLY__
@@ -41,6 +43,8 @@ struct task_struct;
extern void fpsimd_save_state(struct user_fpsimd_state *state);
extern void fpsimd_load_state(struct user_fpsimd_state *state);
extern void fpsimd_save(void);
extern void fpsimd_thread_switch(struct task_struct *next);
extern void fpsimd_flush_thread(void);
@@ -49,12 +53,27 @@ extern void fpsimd_preserve_current_state(void);
extern void fpsimd_restore_current_state(void);
extern void fpsimd_update_current_state(struct user_fpsimd_state const *state);
extern void fpsimd_bind_task_to_cpu(void);
extern void fpsimd_bind_state_to_cpu(struct user_fpsimd_state *state);
extern void fpsimd_flush_task_state(struct task_struct *target);
extern void fpsimd_flush_cpu_state(void);
extern void sve_flush_cpu_state(void);
/* Maximum VL that SVE VL-agnostic software can transparently support */
#define SVE_VL_ARCH_MAX 0x100
/* Offset of FFR in the SVE register dump */
static inline size_t sve_ffr_offset(int vl)
{
return SVE_SIG_FFR_OFFSET(sve_vq_from_vl(vl)) - SVE_SIG_REGS_OFFSET;
}
static inline void *sve_pffr(struct thread_struct *thread)
{
return (char *)thread->sve_state + sve_ffr_offset(thread->sve_vl);
}
extern void sve_save_state(void *state, u32 *pfpsr);
extern void sve_load_state(void const *state, u32 const *pfpsr,
unsigned long vq_minus_1);
@@ -63,6 +82,8 @@ extern unsigned int sve_get_vl(void);
struct arm64_cpu_capabilities;
extern void sve_kernel_enable(const struct arm64_cpu_capabilities *__unused);
extern u64 read_zcr_features(void);
extern int __ro_after_init sve_max_vl;
#ifdef CONFIG_ARM64_SVE
arch/arm64/include/asm/kvm_asm.h
+4 -4
View File
@@ -33,19 +33,19 @@
/* The hyp-stub will return this for any kvm_call_hyp() call */
#define ARM_EXCEPTION_HYP_GONE HVC_STUB_ERR
#define KVM_ARM64_DEBUG_DIRTY_SHIFT 0
#define KVM_ARM64_DEBUG_DIRTY (1 << KVM_ARM64_DEBUG_DIRTY_SHIFT)
#ifndef __ASSEMBLY__
#include <linux/mm.h>
/* Translate a kernel address of @sym into its equivalent linear mapping */
#define kvm_ksym_ref(sym) \
({ \
void *val = &sym; \
if (!is_kernel_in_hyp_mode()) \
val = phys_to_virt((u64)&sym - kimage_voffset); \
val = lm_alias(&sym); \
val; \
})
#ifndef __ASSEMBLY__
struct kvm;
struct kvm_vcpu;
arch/arm64/include/asm/kvm_host.h
+40 -9
View File
@@ -30,6 +30,7 @@
#include <asm/kvm.h>
#include <asm/kvm_asm.h>
#include <asm/kvm_mmio.h>
#include <asm/thread_info.h>
#define __KVM_HAVE_ARCH_INTC_INITIALIZED
@@ -219,8 +220,8 @@ struct kvm_vcpu_arch {
/* State of various workarounds, see kvm_asm.h for bit assignment */
u64 workaround_flags;
/* Guest debug state */
u64 debug_flags;
/* Miscellaneous vcpu state flags */
u64 flags;
/*
* We maintain more than a single set of debug registers to support
@@ -241,6 +242,10 @@ struct kvm_vcpu_arch {
/* Pointer to host CPU context */
kvm_cpu_context_t *host_cpu_context;
struct thread_info *host_thread_info; /* hyp VA */
struct user_fpsimd_state *host_fpsimd_state; /* hyp VA */
struct {
/* {Break,watch}point registers */
struct kvm_guest_debug_arch regs;
@@ -296,6 +301,12 @@ struct kvm_vcpu_arch {
bool sysregs_loaded_on_cpu;
};
/* vcpu_arch flags field values: */
#define KVM_ARM64_DEBUG_DIRTY (1 << 0)
#define KVM_ARM64_FP_ENABLED (1 << 1) /* guest FP regs loaded */
#define KVM_ARM64_FP_HOST (1 << 2) /* host FP regs loaded */
#define KVM_ARM64_HOST_SVE_IN_USE (1 << 3) /* backup for host TIF_SVE */
#define vcpu_gp_regs(v) (&(v)->arch.ctxt.gp_regs)
/*
@@ -397,6 +408,19 @@ static inline void __cpu_init_hyp_mode(phys_addr_t pgd_ptr,
kvm_call_hyp(__kvm_set_tpidr_el2, tpidr_el2);
}
static inline bool kvm_arch_check_sve_has_vhe(void)
{
/*
* The Arm architecture specifies that implementation of SVE
* requires VHE also to be implemented. The KVM code for arm64
* relies on this when SVE is present:
*/
if (system_supports_sve())
return has_vhe();
else
return true;
}
static inline void kvm_arch_hardware_unsetup(void) {}
static inline void kvm_arch_sync_events(struct kvm *kvm) {}
static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {}
@@ -423,15 +447,18 @@ static inline void __cpu_init_stage2(void)
"PARange is %d bits, unsupported configuration!", parange);
}
/*
* All host FP/SIMD state is restored on guest exit, so nothing needs
* doing here except in the SVE case:
*/
static inline void kvm_fpsimd_flush_cpu_state(void)
/* Guest/host FPSIMD coordination helpers */
int kvm_arch_vcpu_run_map_fp(struct kvm_vcpu *vcpu);
void kvm_arch_vcpu_load_fp(struct kvm_vcpu *vcpu);
void kvm_arch_vcpu_ctxsync_fp(struct kvm_vcpu *vcpu);
void kvm_arch_vcpu_put_fp(struct kvm_vcpu *vcpu);
#ifdef CONFIG_KVM /* Avoid conflicts with core headers if CONFIG_KVM=n */
static inline int kvm_arch_vcpu_run_pid_change(struct kvm_vcpu *vcpu)
{
if (system_supports_sve())
sve_flush_cpu_state();
return kvm_arch_vcpu_run_map_fp(vcpu);
}
#endif
static inline void kvm_arm_vhe_guest_enter(void)
{
@@ -481,4 +508,8 @@ static inline int kvm_arm_have_ssbd(void)
void kvm_vcpu_load_sysregs(struct kvm_vcpu *vcpu);
void kvm_vcpu_put_sysregs(struct kvm_vcpu *vcpu);
#define __KVM_HAVE_ARCH_VM_ALLOC
struct kvm *kvm_arch_alloc_vm(void);
void kvm_arch_free_vm(struct kvm *kvm);
#endif /* __ARM64_KVM_HOST_H__ */
arch/arm64/include/asm/processor.h
+14 -1
View File
@@ -158,7 +158,9 @@ static inline void arch_thread_struct_whitelist(unsigned long *offset,
/* Sync TPIDR_EL0 back to thread_struct for current */
void tls_preserve_current_state(void);
#define INIT_THREAD { }
#define INIT_THREAD { \
.fpsimd_cpu = NR_CPUS, \
}
static inline void start_thread_common(struct pt_regs *regs, unsigned long pc)
{
@@ -249,6 +251,17 @@ void cpu_clear_disr(const struct arm64_cpu_capabilities *__unused);
extern unsigned long __ro_after_init signal_minsigstksz; /* sigframe size */
extern void __init minsigstksz_setup(void);
/*
* Not at the top of the file due to a direct #include cycle between
* <asm/fpsimd.h> and <asm/processor.h>. Deferring this #include
* ensures that contents of processor.h are visible to fpsimd.h even if
* processor.h is included first.
*
* These prctl helpers are the only things in this file that require
* fpsimd.h. The core code expects them to be in this header.
*/
#include <asm/fpsimd.h>
/* Userspace interface for PR_SVE_{SET,GET}_VL prctl()s: */
#define SVE_SET_VL(arg) sve_set_current_vl(arg)
#define SVE_GET_VL() sve_get_current_vl()
arch/arm64/include/asm/thread_info.h
+7 -6
View File
@@ -45,12 +45,6 @@ struct thread_info {
int preempt_count; /* 0 => preemptable, <0 => bug */
};
#define INIT_THREAD_INFO(tsk) \
{ \
.preempt_count = INIT_PREEMPT_COUNT, \
.addr_limit = KERNEL_DS, \
}
#define thread_saved_pc(tsk) \
((unsigned long)(tsk->thread.cpu_context.pc))
#define thread_saved_sp(tsk) \
@@ -118,5 +112,12 @@ void arch_release_task_struct(struct task_struct *tsk);
_TIF_SYSCALL_TRACEPOINT | _TIF_SECCOMP | \
_TIF_NOHZ)
#define INIT_THREAD_INFO(tsk) \
{ \
.flags = _TIF_FOREIGN_FPSTATE, \
.preempt_count = INIT_PREEMPT_COUNT, \
.addr_limit = KERNEL_DS, \
}
#endif /* __KERNEL__ */
#endif /* __ASM_THREAD_INFO_H */
arch/arm64/include/uapi/asm/kvm.h
+1
View File
@@ -91,6 +91,7 @@ struct kvm_regs {
#define KVM_VGIC_V3_ADDR_TYPE_DIST 2
#define KVM_VGIC_V3_ADDR_TYPE_REDIST 3
#define KVM_VGIC_ITS_ADDR_TYPE 4
#define KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION 5
#define KVM_VGIC_V3_DIST_SIZE SZ_64K
#define KVM_VGIC_V3_REDIST_SIZE (2 * SZ_64K)