Commit 3ae83945 authored by Linus Torvalds's avatar Linus Torvalds

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

Pull KVM fixes from Paolo Bonzini:
 "Mostly stable material, a lot of ARM fixes"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (22 commits)
  sched: access local runqueue directly in single_task_running
  arm/arm64: KVM: Remove 'config KVM_ARM_MAX_VCPUS'
  arm64: KVM: Remove all traces of the ThumbEE registers
  arm: KVM: Disable virtual timer even if the guest is not using it
  arm64: KVM: Disable virtual timer even if the guest is not using it
  arm/arm64: KVM: vgic: Check for !irqchip_in_kernel() when mapping resources
  KVM: s390: Replace incorrect atomic_or with atomic_andnot
  arm: KVM: Fix incorrect device to IPA mapping
  arm64: KVM: Fix user access for debug registers
  KVM: vmx: fix VPID is 0000H in non-root operation
  KVM: add halt_attempted_poll to VCPU stats
  kvm: fix zero length mmio searching
  kvm: fix double free for fast mmio eventfd
  kvm: factor out core eventfd assign/deassign logic
  kvm: don't try to register to KVM_FAST_MMIO_BUS for non mmio eventfd
  KVM: make the declaration of functions within 80 characters
  KVM: arm64: add workaround for Cortex-A57 erratum #852523
  KVM: fix polling for guest halt continued even if disable it
  arm/arm64: KVM: Fix PSCI affinity info return value for non valid cores
  arm64: KVM: set {v,}TCR_EL2 RES1 bits
  ...
parents fadb97b0 00cc1633
...@@ -29,12 +29,6 @@ ...@@ -29,12 +29,6 @@
#define __KVM_HAVE_ARCH_INTC_INITIALIZED #define __KVM_HAVE_ARCH_INTC_INITIALIZED
#if defined(CONFIG_KVM_ARM_MAX_VCPUS)
#define KVM_MAX_VCPUS CONFIG_KVM_ARM_MAX_VCPUS
#else
#define KVM_MAX_VCPUS 0
#endif
#define KVM_USER_MEM_SLOTS 32 #define KVM_USER_MEM_SLOTS 32
#define KVM_PRIVATE_MEM_SLOTS 4 #define KVM_PRIVATE_MEM_SLOTS 4
#define KVM_COALESCED_MMIO_PAGE_OFFSET 1 #define KVM_COALESCED_MMIO_PAGE_OFFSET 1
...@@ -44,6 +38,8 @@ ...@@ -44,6 +38,8 @@
#include <kvm/arm_vgic.h> #include <kvm/arm_vgic.h>
#define KVM_MAX_VCPUS VGIC_V2_MAX_CPUS
u32 *kvm_vcpu_reg(struct kvm_vcpu *vcpu, u8 reg_num, u32 mode); u32 *kvm_vcpu_reg(struct kvm_vcpu *vcpu, u8 reg_num, u32 mode);
int __attribute_const__ kvm_target_cpu(void); int __attribute_const__ kvm_target_cpu(void);
int kvm_reset_vcpu(struct kvm_vcpu *vcpu); int kvm_reset_vcpu(struct kvm_vcpu *vcpu);
...@@ -148,6 +144,7 @@ struct kvm_vm_stat { ...@@ -148,6 +144,7 @@ struct kvm_vm_stat {
struct kvm_vcpu_stat { struct kvm_vcpu_stat {
u32 halt_successful_poll; u32 halt_successful_poll;
u32 halt_attempted_poll;
u32 halt_wakeup; u32 halt_wakeup;
}; };
......
...@@ -45,15 +45,4 @@ config KVM_ARM_HOST ...@@ -45,15 +45,4 @@ config KVM_ARM_HOST
---help--- ---help---
Provides host support for ARM processors. Provides host support for ARM processors.
config KVM_ARM_MAX_VCPUS
int "Number maximum supported virtual CPUs per VM"
depends on KVM_ARM_HOST
default 4
help
Static number of max supported virtual CPUs per VM.
If you choose a high number, the vcpu structures will be quite
large, so only choose a reasonable number that you expect to
actually use.
endif # VIRTUALIZATION endif # VIRTUALIZATION
...@@ -446,7 +446,7 @@ static int kvm_vcpu_first_run_init(struct kvm_vcpu *vcpu) ...@@ -446,7 +446,7 @@ static int kvm_vcpu_first_run_init(struct kvm_vcpu *vcpu)
* Map the VGIC hardware resources before running a vcpu the first * Map the VGIC hardware resources before running a vcpu the first
* time on this VM. * time on this VM.
*/ */
if (unlikely(!vgic_ready(kvm))) { if (unlikely(irqchip_in_kernel(kvm) && !vgic_ready(kvm))) {
ret = kvm_vgic_map_resources(kvm); ret = kvm_vgic_map_resources(kvm);
if (ret) if (ret)
return ret; return ret;
......
...@@ -515,8 +515,7 @@ ARM_BE8(rev r6, r6 ) ...@@ -515,8 +515,7 @@ ARM_BE8(rev r6, r6 )
mrc p15, 0, r2, c14, c3, 1 @ CNTV_CTL mrc p15, 0, r2, c14, c3, 1 @ CNTV_CTL
str r2, [vcpu, #VCPU_TIMER_CNTV_CTL] str r2, [vcpu, #VCPU_TIMER_CNTV_CTL]
bic r2, #1 @ Clear ENABLE
mcr p15, 0, r2, c14, c3, 1 @ CNTV_CTL
isb isb
mrrc p15, 3, rr_lo_hi(r2, r3), c14 @ CNTV_CVAL mrrc p15, 3, rr_lo_hi(r2, r3), c14 @ CNTV_CVAL
...@@ -529,6 +528,9 @@ ARM_BE8(rev r6, r6 ) ...@@ -529,6 +528,9 @@ ARM_BE8(rev r6, r6 )
mcrr p15, 4, r2, r2, c14 @ CNTVOFF mcrr p15, 4, r2, r2, c14 @ CNTVOFF
1: 1:
mov r2, #0 @ Clear ENABLE
mcr p15, 0, r2, c14, c3, 1 @ CNTV_CTL
@ Allow physical timer/counter access for the host @ Allow physical timer/counter access for the host
mrc p15, 4, r2, c14, c1, 0 @ CNTHCTL mrc p15, 4, r2, c14, c1, 0 @ CNTHCTL
orr r2, r2, #(CNTHCTL_PL1PCEN | CNTHCTL_PL1PCTEN) orr r2, r2, #(CNTHCTL_PL1PCEN | CNTHCTL_PL1PCTEN)
......
...@@ -1792,8 +1792,10 @@ int kvm_arch_prepare_memory_region(struct kvm *kvm, ...@@ -1792,8 +1792,10 @@ int kvm_arch_prepare_memory_region(struct kvm *kvm,
if (vma->vm_flags & VM_PFNMAP) { if (vma->vm_flags & VM_PFNMAP) {
gpa_t gpa = mem->guest_phys_addr + gpa_t gpa = mem->guest_phys_addr +
(vm_start - mem->userspace_addr); (vm_start - mem->userspace_addr);
phys_addr_t pa = (vma->vm_pgoff << PAGE_SHIFT) + phys_addr_t pa;
vm_start - vma->vm_start;
pa = (phys_addr_t)vma->vm_pgoff << PAGE_SHIFT;
pa += vm_start - vma->vm_start;
/* IO region dirty page logging not allowed */ /* IO region dirty page logging not allowed */
if (memslot->flags & KVM_MEM_LOG_DIRTY_PAGES) if (memslot->flags & KVM_MEM_LOG_DIRTY_PAGES)
......
...@@ -126,7 +126,7 @@ static unsigned long kvm_psci_vcpu_on(struct kvm_vcpu *source_vcpu) ...@@ -126,7 +126,7 @@ static unsigned long kvm_psci_vcpu_on(struct kvm_vcpu *source_vcpu)
static unsigned long kvm_psci_vcpu_affinity_info(struct kvm_vcpu *vcpu) static unsigned long kvm_psci_vcpu_affinity_info(struct kvm_vcpu *vcpu)
{ {
int i; int i, matching_cpus = 0;
unsigned long mpidr; unsigned long mpidr;
unsigned long target_affinity; unsigned long target_affinity;
unsigned long target_affinity_mask; unsigned long target_affinity_mask;
...@@ -151,12 +151,16 @@ static unsigned long kvm_psci_vcpu_affinity_info(struct kvm_vcpu *vcpu) ...@@ -151,12 +151,16 @@ static unsigned long kvm_psci_vcpu_affinity_info(struct kvm_vcpu *vcpu)
*/ */
kvm_for_each_vcpu(i, tmp, kvm) { kvm_for_each_vcpu(i, tmp, kvm) {
mpidr = kvm_vcpu_get_mpidr_aff(tmp); mpidr = kvm_vcpu_get_mpidr_aff(tmp);
if (((mpidr & target_affinity_mask) == target_affinity) && if ((mpidr & target_affinity_mask) == target_affinity) {
!tmp->arch.pause) { matching_cpus++;
if (!tmp->arch.pause)
return PSCI_0_2_AFFINITY_LEVEL_ON; return PSCI_0_2_AFFINITY_LEVEL_ON;
} }
} }
if (!matching_cpus)
return PSCI_RET_INVALID_PARAMS;
return PSCI_0_2_AFFINITY_LEVEL_OFF; return PSCI_0_2_AFFINITY_LEVEL_OFF;
} }
......
...@@ -95,6 +95,7 @@ ...@@ -95,6 +95,7 @@
SCTLR_EL2_SA | SCTLR_EL2_I) SCTLR_EL2_SA | SCTLR_EL2_I)
/* TCR_EL2 Registers bits */ /* TCR_EL2 Registers bits */
#define TCR_EL2_RES1 ((1 << 31) | (1 << 23))
#define TCR_EL2_TBI (1 << 20) #define TCR_EL2_TBI (1 << 20)
#define TCR_EL2_PS (7 << 16) #define TCR_EL2_PS (7 << 16)
#define TCR_EL2_PS_40B (2 << 16) #define TCR_EL2_PS_40B (2 << 16)
...@@ -106,9 +107,10 @@ ...@@ -106,9 +107,10 @@
#define TCR_EL2_MASK (TCR_EL2_TG0 | TCR_EL2_SH0 | \ #define TCR_EL2_MASK (TCR_EL2_TG0 | TCR_EL2_SH0 | \
TCR_EL2_ORGN0 | TCR_EL2_IRGN0 | TCR_EL2_T0SZ) TCR_EL2_ORGN0 | TCR_EL2_IRGN0 | TCR_EL2_T0SZ)
#define TCR_EL2_FLAGS (TCR_EL2_PS_40B) #define TCR_EL2_FLAGS (TCR_EL2_RES1 | TCR_EL2_PS_40B)
/* VTCR_EL2 Registers bits */ /* VTCR_EL2 Registers bits */
#define VTCR_EL2_RES1 (1 << 31)
#define VTCR_EL2_PS_MASK (7 << 16) #define VTCR_EL2_PS_MASK (7 << 16)
#define VTCR_EL2_TG0_MASK (1 << 14) #define VTCR_EL2_TG0_MASK (1 << 14)
#define VTCR_EL2_TG0_4K (0 << 14) #define VTCR_EL2_TG0_4K (0 << 14)
...@@ -147,7 +149,8 @@ ...@@ -147,7 +149,8 @@
*/ */
#define VTCR_EL2_FLAGS (VTCR_EL2_TG0_64K | VTCR_EL2_SH0_INNER | \ #define VTCR_EL2_FLAGS (VTCR_EL2_TG0_64K | VTCR_EL2_SH0_INNER | \
VTCR_EL2_ORGN0_WBWA | VTCR_EL2_IRGN0_WBWA | \ VTCR_EL2_ORGN0_WBWA | VTCR_EL2_IRGN0_WBWA | \
VTCR_EL2_SL0_LVL1 | VTCR_EL2_T0SZ_40B) VTCR_EL2_SL0_LVL1 | VTCR_EL2_T0SZ_40B | \
VTCR_EL2_RES1)
#define VTTBR_X (38 - VTCR_EL2_T0SZ_40B) #define VTTBR_X (38 - VTCR_EL2_T0SZ_40B)
#else #else
/* /*
...@@ -158,7 +161,8 @@ ...@@ -158,7 +161,8 @@
*/ */
#define VTCR_EL2_FLAGS (VTCR_EL2_TG0_4K | VTCR_EL2_SH0_INNER | \ #define VTCR_EL2_FLAGS (VTCR_EL2_TG0_4K | VTCR_EL2_SH0_INNER | \
VTCR_EL2_ORGN0_WBWA | VTCR_EL2_IRGN0_WBWA | \ VTCR_EL2_ORGN0_WBWA | VTCR_EL2_IRGN0_WBWA | \
VTCR_EL2_SL0_LVL1 | VTCR_EL2_T0SZ_40B) VTCR_EL2_SL0_LVL1 | VTCR_EL2_T0SZ_40B | \
VTCR_EL2_RES1)
#define VTTBR_X (37 - VTCR_EL2_T0SZ_40B) #define VTTBR_X (37 - VTCR_EL2_T0SZ_40B)
#endif #endif
...@@ -168,7 +172,6 @@ ...@@ -168,7 +172,6 @@
#define VTTBR_VMID_MASK (UL(0xFF) << VTTBR_VMID_SHIFT) #define VTTBR_VMID_MASK (UL(0xFF) << VTTBR_VMID_SHIFT)
/* Hyp System Trap Register */ /* Hyp System Trap Register */
#define HSTR_EL2_TTEE (1 << 16)
#define HSTR_EL2_T(x) (1 << x) #define HSTR_EL2_T(x) (1 << x)
/* Hyp Coproccessor Trap Register Shifts */ /* Hyp Coproccessor Trap Register Shifts */
......
...@@ -53,9 +53,7 @@ ...@@ -53,9 +53,7 @@
#define IFSR32_EL2 25 /* Instruction Fault Status Register */ #define IFSR32_EL2 25 /* Instruction Fault Status Register */
#define FPEXC32_EL2 26 /* Floating-Point Exception Control Register */ #define FPEXC32_EL2 26 /* Floating-Point Exception Control Register */
#define DBGVCR32_EL2 27 /* Debug Vector Catch Register */ #define DBGVCR32_EL2 27 /* Debug Vector Catch Register */
#define TEECR32_EL1 28 /* ThumbEE Configuration Register */ #define NR_SYS_REGS 28
#define TEEHBR32_EL1 29 /* ThumbEE Handler Base Register */
#define NR_SYS_REGS 30
/* 32bit mapping */ /* 32bit mapping */
#define c0_MPIDR (MPIDR_EL1 * 2) /* MultiProcessor ID Register */ #define c0_MPIDR (MPIDR_EL1 * 2) /* MultiProcessor ID Register */
......
...@@ -30,12 +30,6 @@ ...@@ -30,12 +30,6 @@
#define __KVM_HAVE_ARCH_INTC_INITIALIZED #define __KVM_HAVE_ARCH_INTC_INITIALIZED
#if defined(CONFIG_KVM_ARM_MAX_VCPUS)
#define KVM_MAX_VCPUS CONFIG_KVM_ARM_MAX_VCPUS
#else
#define KVM_MAX_VCPUS 0
#endif
#define KVM_USER_MEM_SLOTS 32 #define KVM_USER_MEM_SLOTS 32
#define KVM_PRIVATE_MEM_SLOTS 4 #define KVM_PRIVATE_MEM_SLOTS 4
#define KVM_COALESCED_MMIO_PAGE_OFFSET 1 #define KVM_COALESCED_MMIO_PAGE_OFFSET 1
...@@ -43,6 +37,8 @@ ...@@ -43,6 +37,8 @@
#include <kvm/arm_vgic.h> #include <kvm/arm_vgic.h>
#include <kvm/arm_arch_timer.h> #include <kvm/arm_arch_timer.h>
#define KVM_MAX_VCPUS VGIC_V3_MAX_CPUS
#define KVM_VCPU_MAX_FEATURES 3 #define KVM_VCPU_MAX_FEATURES 3
int __attribute_const__ kvm_target_cpu(void); int __attribute_const__ kvm_target_cpu(void);
...@@ -195,6 +191,7 @@ struct kvm_vm_stat { ...@@ -195,6 +191,7 @@ struct kvm_vm_stat {
struct kvm_vcpu_stat { struct kvm_vcpu_stat {
u32 halt_successful_poll; u32 halt_successful_poll;
u32 halt_attempted_poll;
u32 halt_wakeup; u32 halt_wakeup;
}; };
......
...@@ -41,15 +41,4 @@ config KVM_ARM_HOST ...@@ -41,15 +41,4 @@ config KVM_ARM_HOST
---help--- ---help---
Provides host support for ARM processors. Provides host support for ARM processors.
config KVM_ARM_MAX_VCPUS
int "Number maximum supported virtual CPUs per VM"
depends on KVM_ARM_HOST
default 4
help
Static number of max supported virtual CPUs per VM.
If you choose a high number, the vcpu structures will be quite
large, so only choose a reasonable number that you expect to
actually use.
endif # VIRTUALIZATION endif # VIRTUALIZATION
...@@ -433,20 +433,13 @@ ...@@ -433,20 +433,13 @@
mrs x5, ifsr32_el2 mrs x5, ifsr32_el2
stp x4, x5, [x3] stp x4, x5, [x3]
skip_fpsimd_state x8, 3f skip_fpsimd_state x8, 2f
mrs x6, fpexc32_el2 mrs x6, fpexc32_el2
str x6, [x3, #16] str x6, [x3, #16]
3: 2:
skip_debug_state x8, 2f skip_debug_state x8, 1f
mrs x7, dbgvcr32_el2 mrs x7, dbgvcr32_el2
str x7, [x3, #24] str x7, [x3, #24]
2:
skip_tee_state x8, 1f
add x3, x2, #CPU_SYSREG_OFFSET(TEECR32_EL1)
mrs x4, teecr32_el1
mrs x5, teehbr32_el1
stp x4, x5, [x3]
1: 1:
.endm .endm
...@@ -466,16 +459,9 @@ ...@@ -466,16 +459,9 @@
msr dacr32_el2, x4 msr dacr32_el2, x4
msr ifsr32_el2, x5 msr ifsr32_el2, x5
skip_debug_state x8, 2f skip_debug_state x8, 1f
ldr x7, [x3, #24] ldr x7, [x3, #24]
msr dbgvcr32_el2, x7 msr dbgvcr32_el2, x7
2:
skip_tee_state x8, 1f
add x3, x2, #CPU_SYSREG_OFFSET(TEECR32_EL1)
ldp x4, x5, [x3]
msr teecr32_el1, x4
msr teehbr32_el1, x5
1: 1:
.endm .endm
...@@ -570,8 +556,6 @@ alternative_endif ...@@ -570,8 +556,6 @@ alternative_endif
mrs x3, cntv_ctl_el0 mrs x3, cntv_ctl_el0
and x3, x3, #3 and x3, x3, #3
str w3, [x0, #VCPU_TIMER_CNTV_CTL] str w3, [x0, #VCPU_TIMER_CNTV_CTL]
bic x3, x3, #1 // Clear Enable
msr cntv_ctl_el0, x3
isb isb
...@@ -579,6 +563,9 @@ alternative_endif ...@@ -579,6 +563,9 @@ alternative_endif
str x3, [x0, #VCPU_TIMER_CNTV_CVAL] str x3, [x0, #VCPU_TIMER_CNTV_CVAL]
1: 1:
// Disable the virtual timer
msr cntv_ctl_el0, xzr
// Allow physical timer/counter access for the host // Allow physical timer/counter access for the host
mrs x2, cnthctl_el2 mrs x2, cnthctl_el2
orr x2, x2, #3 orr x2, x2, #3
...@@ -753,6 +740,9 @@ ENTRY(__kvm_vcpu_run) ...@@ -753,6 +740,9 @@ ENTRY(__kvm_vcpu_run)
// Guest context // Guest context
add x2, x0, #VCPU_CONTEXT add x2, x0, #VCPU_CONTEXT
// We must restore the 32-bit state before the sysregs, thanks
// to Cortex-A57 erratum #852523.
restore_guest_32bit_state
bl __restore_sysregs bl __restore_sysregs
skip_debug_state x3, 1f skip_debug_state x3, 1f
...@@ -760,7 +750,6 @@ ENTRY(__kvm_vcpu_run) ...@@ -760,7 +750,6 @@ ENTRY(__kvm_vcpu_run)
kern_hyp_va x3 kern_hyp_va x3
bl __restore_debug bl __restore_debug
1: 1:
restore_guest_32bit_state
restore_guest_regs restore_guest_regs
// That's it, no more messing around. // That's it, no more messing around.
......
...@@ -272,7 +272,7 @@ static int set_bvr(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd, ...@@ -272,7 +272,7 @@ static int set_bvr(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd,
{ {
__u64 *r = &vcpu->arch.vcpu_debug_state.dbg_bvr[rd->reg]; __u64 *r = &vcpu->arch.vcpu_debug_state.dbg_bvr[rd->reg];
if (copy_from_user(uaddr, r, KVM_REG_SIZE(reg->id)) != 0) if (copy_from_user(r, uaddr, KVM_REG_SIZE(reg->id)) != 0)
return -EFAULT; return -EFAULT;
return 0; return 0;
} }
...@@ -314,7 +314,7 @@ static int set_bcr(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd, ...@@ -314,7 +314,7 @@ static int set_bcr(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd,
{ {
__u64 *r = &vcpu->arch.vcpu_debug_state.dbg_bcr[rd->reg]; __u64 *r = &vcpu->arch.vcpu_debug_state.dbg_bcr[rd->reg];
if (copy_from_user(uaddr, r, KVM_REG_SIZE(reg->id)) != 0) if (copy_from_user(r, uaddr, KVM_REG_SIZE(reg->id)) != 0)
return -EFAULT; return -EFAULT;
return 0; return 0;
...@@ -358,7 +358,7 @@ static int set_wvr(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd, ...@@ -358,7 +358,7 @@ static int set_wvr(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd,
{ {
__u64 *r = &vcpu->arch.vcpu_debug_state.dbg_wvr[rd->reg]; __u64 *r = &vcpu->arch.vcpu_debug_state.dbg_wvr[rd->reg];
if (copy_from_user(uaddr, r, KVM_REG_SIZE(reg->id)) != 0) if (copy_from_user(r, uaddr, KVM_REG_SIZE(reg->id)) != 0)
return -EFAULT; return -EFAULT;
return 0; return 0;
} }
...@@ -400,7 +400,7 @@ static int set_wcr(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd, ...@@ -400,7 +400,7 @@ static int set_wcr(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd,
{ {
__u64 *r = &vcpu->arch.vcpu_debug_state.dbg_wcr[rd->reg]; __u64 *r = &vcpu->arch.vcpu_debug_state.dbg_wcr[rd->reg];
if (copy_from_user(uaddr, r, KVM_REG_SIZE(reg->id)) != 0) if (copy_from_user(r, uaddr, KVM_REG_SIZE(reg->id)) != 0)
return -EFAULT; return -EFAULT;
return 0; return 0;
} }
...@@ -539,13 +539,6 @@ static const struct sys_reg_desc sys_reg_descs[] = { ...@@ -539,13 +539,6 @@ static const struct sys_reg_desc sys_reg_descs[] = {
{ Op0(0b10), Op1(0b000), CRn(0b0111), CRm(0b1110), Op2(0b110), { Op0(0b10), Op1(0b000), CRn(0b0111), CRm(0b1110), Op2(0b110),
trap_dbgauthstatus_el1 }, trap_dbgauthstatus_el1 },
/* TEECR32_EL1 */
{ Op0(0b10), Op1(0b010), CRn(0b0000), CRm(0b0000), Op2(0b000),
NULL, reset_val, TEECR32_EL1, 0 },
/* TEEHBR32_EL1 */
{ Op0(0b10), Op1(0b010), CRn(0b0001), CRm(0b0000), Op2(0b000),
NULL, reset_val, TEEHBR32_EL1, 0 },
/* MDCCSR_EL1 */ /* MDCCSR_EL1 */
{ Op0(0b10), Op1(0b011), CRn(0b0000), CRm(0b0001), Op2(0b000), { Op0(0b10), Op1(0b011), CRn(0b0000), CRm(0b0001), Op2(0b000),
trap_raz_wi }, trap_raz_wi },
......
...@@ -128,6 +128,7 @@ struct kvm_vcpu_stat { ...@@ -128,6 +128,7 @@ struct kvm_vcpu_stat {
u32 msa_disabled_exits; u32 msa_disabled_exits;
u32 flush_dcache_exits; u32 flush_dcache_exits;
u32 halt_successful_poll; u32 halt_successful_poll;
u32 halt_attempted_poll;
u32 halt_wakeup; u32 halt_wakeup;
}; };
......
...@@ -55,6 +55,7 @@ struct kvm_stats_debugfs_item debugfs_entries[] = { ...@@ -55,6 +55,7 @@ struct kvm_stats_debugfs_item debugfs_entries[] = {
{ "msa_disabled", VCPU_STAT(msa_disabled_exits), KVM_STAT_VCPU }, { "msa_disabled", VCPU_STAT(msa_disabled_exits), KVM_STAT_VCPU },
{ "flush_dcache", VCPU_STAT(flush_dcache_exits), KVM_STAT_VCPU }, { "flush_dcache", VCPU_STAT(flush_dcache_exits), KVM_STAT_VCPU },
{ "halt_successful_poll", VCPU_STAT(halt_successful_poll), KVM_STAT_VCPU }, { "halt_successful_poll", VCPU_STAT(halt_successful_poll), KVM_STAT_VCPU },
{ "halt_attempted_poll", VCPU_STAT(halt_attempted_poll), KVM_STAT_VCPU },
{ "halt_wakeup", VCPU_STAT(halt_wakeup), KVM_STAT_VCPU }, { "halt_wakeup", VCPU_STAT(halt_wakeup), KVM_STAT_VCPU },
{NULL} {NULL}
}; };
......
...@@ -108,6 +108,7 @@ struct kvm_vcpu_stat { ...@@ -108,6 +108,7 @@ struct kvm_vcpu_stat {
u32 dec_exits; u32 dec_exits;
u32 ext_intr_exits; u32 ext_intr_exits;
u32 halt_successful_poll; u32 halt_successful_poll;
u32 halt_attempted_poll;
u32 halt_wakeup; u32 halt_wakeup;
u32 dbell_exits; u32 dbell_exits;
u32 gdbell_exits; u32 gdbell_exits;
......
...@@ -53,6 +53,7 @@ struct kvm_stats_debugfs_item debugfs_entries[] = { ...@@ -53,6 +53,7 @@ struct kvm_stats_debugfs_item debugfs_entries[] = {
{ "ext_intr", VCPU_STAT(ext_intr_exits) }, { "ext_intr", VCPU_STAT(ext_intr_exits) },
{ "queue_intr", VCPU_STAT(queue_intr) }, { "queue_intr", VCPU_STAT(queue_intr) },
{ "halt_successful_poll", VCPU_STAT(halt_successful_poll), }, { "halt_successful_poll", VCPU_STAT(halt_successful_poll), },
{ "halt_attempted_poll", VCPU_STAT(halt_attempted_poll), },
{ "halt_wakeup", VCPU_STAT(halt_wakeup) }, { "halt_wakeup", VCPU_STAT(halt_wakeup) },
{ "pf_storage", VCPU_STAT(pf_storage) }, { "pf_storage", VCPU_STAT(pf_storage) },
{ "sp_storage", VCPU_STAT(sp_storage) }, { "sp_storage", VCPU_STAT(sp_storage) },
......
...@@ -63,6 +63,7 @@ struct kvm_stats_debugfs_item debugfs_entries[] = { ...@@ -63,6 +63,7 @@ struct kvm_stats_debugfs_item debugfs_entries[] = {
{ "dec", VCPU_STAT(dec_exits) }, { "dec", VCPU_STAT(dec_exits) },
{ "ext_intr", VCPU_STAT(ext_intr_exits) }, { "ext_intr", VCPU_STAT(ext_intr_exits) },
{ "halt_successful_poll", VCPU_STAT(halt_successful_poll) }, { "halt_successful_poll", VCPU_STAT(halt_successful_poll) },
{ "halt_attempted_poll", VCPU_STAT(halt_attempted_poll) },
{ "halt_wakeup", VCPU_STAT(halt_wakeup) }, { "halt_wakeup", VCPU_STAT(halt_wakeup) },
{ "doorbell", VCPU_STAT(dbell_exits) }, { "doorbell", VCPU_STAT(dbell_exits) },
{ "guest doorbell", VCPU_STAT(gdbell_exits) }, { "guest doorbell", VCPU_STAT(gdbell_exits) },
......
...@@ -210,6 +210,7 @@ struct kvm_vcpu_stat { ...@@ -210,6 +210,7 @@ struct kvm_vcpu_stat {
u32 exit_validity; u32 exit_validity;
u32 exit_instruction; u32 exit_instruction;
u32 halt_successful_poll; u32 halt_successful_poll;
u32 halt_attempted_poll;
u32 halt_wakeup; u32 halt_wakeup;
u32 instruction_lctl; u32 instruction_lctl;
u32 instruction_lctlg; u32 instruction_lctlg;
......
...@@ -63,6 +63,7 @@ struct kvm_stats_debugfs_item debugfs_entries[] = { ...@@ -63,6 +63,7 @@ struct kvm_stats_debugfs_item debugfs_entries[] = {
{ "exit_program_interruption", VCPU_STAT(exit_program_interruption) }, { "exit_program_interruption", VCPU_STAT(exit_program_interruption) },
{ "exit_instr_and_program_int", VCPU_STAT(exit_instr_and_program) }, { "exit_instr_and_program_int", VCPU_STAT(exit_instr_and_program) },
{ "halt_successful_poll", VCPU_STAT(halt_successful_poll) }, { "halt_successful_poll", VCPU_STAT(halt_successful_poll) },
{ "halt_attempted_poll", VCPU_STAT(halt_attempted_poll) },
{ "halt_wakeup", VCPU_STAT(halt_wakeup) }, { "halt_wakeup", VCPU_STAT(halt_wakeup) },
{ "instruction_lctlg", VCPU_STAT(instruction_lctlg) }, { "instruction_lctlg", VCPU_STAT(instruction_lctlg) },
{ "instruction_lctl", VCPU_STAT(instruction_lctl) }, { "instruction_lctl", VCPU_STAT(instruction_lctl) },
...@@ -1574,7 +1575,7 @@ static void kvm_s390_vcpu_request(struct kvm_vcpu *vcpu) ...@@ -1574,7 +1575,7 @@ static void kvm_s390_vcpu_request(struct kvm_vcpu *vcpu)
static void kvm_s390_vcpu_request_handled(struct kvm_vcpu *vcpu) static void kvm_s390_vcpu_request_handled(struct kvm_vcpu *vcpu)
{ {
atomic_or(PROG_REQUEST, &vcpu->arch.sie_block->prog20); atomic_andnot(PROG_REQUEST, &vcpu->arch.sie_block->prog20);
} }
/* /*
......
...@@ -711,6 +711,7 @@ struct kvm_vcpu_stat { ...@@ -711,6 +711,7 @@ struct kvm_vcpu_stat {
u32 nmi_window_exits; u32 nmi_window_exits;
u32 halt_exits; u32 halt_exits;
u32 halt_successful_poll; u32 halt_successful_poll;
u32 halt_attempted_poll;
u32 halt_wakeup; u32 halt_wakeup;
u32 request_irq_exits; u32 request_irq_exits;
u32 irq_exits; u32 irq_exits;
......
...@@ -6064,6 +6064,8 @@ static __init int hardware_setup(void) ...@@ -6064,6 +6064,8 @@ static __init int hardware_setup(void)
memcpy(vmx_msr_bitmap_longmode_x2apic, memcpy(vmx_msr_bitmap_longmode_x2apic,
vmx_msr_bitmap_longmode, PAGE_SIZE); vmx_msr_bitmap_longmode, PAGE_SIZE);
set_bit(0, vmx_vpid_bitmap); /* 0 is reserved for host */
if (enable_apicv) { if (enable_apicv) {
for (msr = 0x800; msr <= 0x8ff; msr++) for (msr = 0x800; msr <= 0x8ff; msr++)
vmx_disable_intercept_msr_read_x2apic(msr); vmx_disable_intercept_msr_read_x2apic(msr);
......
...@@ -149,6 +149,7 @@ struct kvm_stats_debugfs_item debugfs_entries[] = { ...@@ -149,6 +149,7 @@ struct kvm_stats_debugfs_item debugfs_entries[] = {
{ "nmi_window", VCPU_STAT(nmi_window_exits) }, { "nmi_window", VCPU_STAT(nmi_window_exits) },
{ "halt_exits", VCPU_STAT(halt_exits) }, { "halt_exits", VCPU_STAT(halt_exits) },
{ "halt_successful_poll", VCPU_STAT(halt_successful_poll) }, { "halt_successful_poll", VCPU_STAT(halt_successful_poll) },
{ "halt_attempted_poll", VCPU_STAT(halt_attempted_poll) },
{ "halt_wakeup", VCPU_STAT(halt_wakeup) }, { "halt_wakeup", VCPU_STAT(halt_wakeup) },
{ "hypercalls", VCPU_STAT(hypercalls) }, { "hypercalls", VCPU_STAT(hypercalls) },
{ "request_irq", VCPU_STAT(request_irq_exits) }, { "request_irq", VCPU_STAT(request_irq_exits) },
......
...@@ -35,11 +35,7 @@ ...@@ -35,11 +35,7 @@
#define VGIC_V3_MAX_LRS 16 #define VGIC_V3_MAX_LRS 16
#define VGIC_MAX_IRQS 1024 #define VGIC_MAX_IRQS 1024
#define VGIC_V2_MAX_CPUS 8 #define VGIC_V2_MAX_CPUS 8
#define VGIC_V3_MAX_CPUS 255
/* Sanity checks... */
#if (KVM_MAX_VCPUS > 255)
#error Too many KVM VCPUs, the VGIC only supports up to 255 VCPUs for now
#endif
#if (VGIC_NR_IRQS_LEGACY & 31) #if (VGIC_NR_IRQS_LEGACY & 31)
#error "VGIC_NR_IRQS must be a multiple of 32" #error "VGIC_NR_IRQS must be a multiple of 32"
......
...@@ -2669,13 +2669,20 @@ unsigned long nr_running(void) ...@@ -2669,13 +2669,20 @@ unsigned long nr_running(void)
/* /*
* Check if only the current task is running on the cpu. * Check if only the current task is running on the cpu.
*
* Caution: this function does not check that the caller has disabled
* preemption, thus the result might have a time-of-check-to-time-of-use
* race. The caller is responsible to use it correctly, for example:
*
* - from a non-preemptable section (of course)
*
* - from a thread that is bound to a single CPU
*
* - in a loop with very short iterations (e.g. a polling loop)
*/ */
bool single_task_running(void) bool single_task_running(void)
{ {
if (cpu_rq(smp_processor_id())->nr_running == 1) return raw_rq()->nr_running == 1;
return true;
else
return false;
} }
EXPORT_SYMBOL(single_task_running); EXPORT_SYMBOL(single_task_running);
......
...@@ -199,6 +199,14 @@ int kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu, ...@@ -199,6 +199,14 @@ int kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu,
*/ */
timer->irq = irq; timer->irq = irq;
/*
* The bits in CNTV_CTL are architecturally reset to UNKNOWN for ARMv8
* and to 0 for ARMv7. We provide an implementation that always
* resets the timer to be disabled and unmasked and is compliant with
* the ARMv7 architecture.
*/
timer->cntv_ctl = 0;
/* /*
* Tell the VGIC that the virtual interrupt is tied to a * Tell the VGIC that the virtual interrupt is tied to a
* physical interrupt. We do that once per VCPU. * physical interrupt. We do that once per VCPU.
......
...@@ -288,7 +288,7 @@ int vgic_v3_probe(struct device_node *vgic_node, ...@@ -288,7 +288,7 @@ int vgic_v3_probe(struct device_node *vgic_node,
vgic->vctrl_base = NULL; vgic->vctrl_base = NULL;
vgic->type = VGIC_V3; vgic->type = VGIC_V3;
vgic->max_gic_vcpus = KVM_MAX_VCPUS; vgic->max_gic_vcpus = VGIC_V3_MAX_CPUS;
kvm_info("%s@%llx IRQ%d\n", vgic_node->name, kvm_info("%s@%llx IRQ%d\n", vgic_node->name,
vcpu_res.start, vgic->maint_irq); vcpu_res.start, vgic->maint_irq);
......
...@@ -1144,26 +1144,11 @@ static void vgic_queue_irq_to_lr(struct kvm_vcpu *vcpu, int irq, ...@@ -1144,26 +1144,11 @@ static void vgic_queue_irq_to_lr(struct kvm_vcpu *vcpu, int irq,
struct irq_phys_map *map; struct irq_phys_map *map;
map = vgic_irq_map_search(vcpu, irq); map = vgic_irq_map_search(vcpu, irq);
/*
* If we have a mapping, and the virtual interrupt is
* being injected, then we must set the state to
* active in the physical world. Otherwise the
* physical interrupt will fire and the guest will
* exit before processing the virtual interrupt.
*/
if (map) { if (map) {
int ret;
BUG_ON(!map->active);
vlr.hwirq = map->phys_irq; vlr.hwirq = map->phys_irq;
vlr.state |= LR_HW; vlr.state |= LR_HW;
vlr.state &= ~LR_EOI_INT; vlr.state &= ~LR_EOI_INT;
ret = irq_set_irqchip_state(map->irq,
IRQCHIP_STATE_ACTIVE,
true);
WARN_ON(ret);
/* /*
* Make sure we're not going to sample this * Make sure we're not going to sample this
* again, as a HW-backed interrupt cannot be * again, as a HW-backed interrupt cannot be
...@@ -1255,7 +1240,7 @@ static void __kvm_vgic_flush_hwstate(struct kvm_vcpu *vcpu) ...@@ -1255,7 +1240,7 @@ static void __kvm_vgic_flush_hwstate(struct kvm_vcpu *vcpu)
struct vgic_cpu *vgic_cpu = &vcpu->arch.vgic_cpu; struct vgic_cpu *vgic_cpu = &vcpu->arch.vgic_cpu;
struct vgic_dist *dist = &vcpu->kvm->arch.vgic; struct vgic_dist *dist = &vcpu->kvm->arch.vgic;
unsigned long *pa_percpu, *pa_shared; unsigned long *pa_percpu, *pa_shared;
int i, vcpu_id; int i, vcpu_id, lr, ret;
int overflow = 0; int overflow = 0;
int nr_shared = vgic_nr_shared_irqs(dist); int nr_shared = vgic_nr_shared_irqs(dist);
...@@ -1310,6 +1295,31 @@ static void __kvm_vgic_flush_hwstate(struct kvm_vcpu *vcpu) ...@@ -1310,6 +1295,31 @@ static void __kvm_vgic_flush_hwstate(struct kvm_vcpu *vcpu)
*/ */
clear_bit(vcpu_id, dist->irq_pending_on_cpu); clear_bit(vcpu_id, dist->irq_pending_on_cpu);
} }
for (lr = 0; lr < vgic->nr_lr; lr++) {
struct vgic_lr vlr;
if (!test_bit(lr, vgic_cpu->lr_used))
continue;
vlr = vgic_get_lr(vcpu, lr);
/*
* If we have a mapping, and the virtual interrupt is
* presented to the guest (as pending or active), then we must
* set the state to active in the physical world. See
* Documentation/virtual/kvm/arm/vgic-mapped-irqs.txt.
*/
if (vlr.state & LR_HW) {
struct irq_phys_map *map;
map = vgic_irq_map_search(vcpu, vlr.irq);
ret = irq_set_irqchip_state(map->irq,
IRQCHIP_STATE_ACTIVE,
true);
WARN_ON(ret);
}
}
} }
static bool vgic_process_maintenance(struct kvm_vcpu *vcpu) static bool vgic_process_maintenance(struct kvm_vcpu *vcpu)
......
...@@ -771,41 +771,15 @@ static enum kvm_bus ioeventfd_bus_from_flags(__u32 flags) ...@@ -771,41 +771,15 @@ static enum kvm_bus ioeventfd_bus_from_flags(__u32 flags)
return KVM_MMIO_BUS; return KVM_MMIO_BUS;
} }
static int static int kvm_assign_ioeventfd_idx(struct kvm *kvm,
kvm_assign_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args) enum kvm_bus bus_idx,
struct kvm_ioeventfd *args)
{ {
enum kvm_bus bus_idx;
struct _ioeventfd *p;
struct eventfd_ctx *eventfd; struct eventfd_ctx *eventfd;
struct _ioeventfd *p;
int ret; int ret;
bus_idx = ioeventfd_bus_from_flags(args->flags);
/* must be natural-word sized, or 0 to ignore length */
switch (args->len) {
case 0:
case 1:
case 2:
case 4:
case 8:
break;
default:
return -EINVAL;
}
/* check for range overflow */
if (args->addr + args->len < args->addr)
return -EINVAL;
/* check for extra flags that we don't understand */
if (args->flags & ~KVM_IOEVENTFD_VALID_FLAG_MASK)
return -EINVAL;
/* ioeventfd with no length can't be combined with DATAMATCH */
if (!args->len &&
args->flags & (KVM_IOEVENTFD_FLAG_PIO |
KVM_IOEVENTFD_FLAG_DATAMATCH))
return -EINVAL;
eventfd = eventfd_ctx_fdget(args->fd); eventfd = eventfd_ctx_fdget(args->fd);
if (IS_ERR(eventfd)) if (IS_ERR(eventfd))
return PTR_ERR(eventfd); return PTR_ERR(eventfd);
...@@ -843,16 +817,6 @@ kvm_assign_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args) ...@@ -843,16 +817,6 @@ kvm_assign_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
if (ret < 0) if (ret < 0)
goto unlock_fail; goto unlock_fail;
/* When length is ignored, MMIO is also put on a separate bus, for
* faster lookups.
*/
if (!args->len && !(args->flags & KVM_IOEVENTFD_FLAG_PIO)) {
ret = kvm_io_bus_register_dev(kvm, KVM_FAST_MMIO_BUS,
p->addr, 0, &p->dev);
if (ret < 0)
goto register_fail;
}
kvm->buses[bus_idx]->ioeventfd_count++; kvm->buses[bus_idx]->ioeventfd_count++;
list_add_tail(&p->list, &kvm->ioeventfds); list_add_tail(&p->list, &kvm->ioeventfds);
...@@ -860,8 +824,6 @@ kvm_assign_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args) ...@@ -860,8 +824,6 @@ kvm_assign_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
return 0; return 0;
register_fail:
kvm_io_bus_unregister_dev(kvm, bus_idx, &p->dev);
unlock_fail: unlock_fail:
mutex_unlock(&kvm->slots_lock); mutex_unlock(&kvm->slots_lock);
...@@ -873,14 +835,13 @@ kvm_assign_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args) ...@@ -873,14 +835,13 @@ kvm_assign_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
} }
static int static int
kvm_deassign_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args) kvm_deassign_ioeventfd_idx(struct kvm *kvm, enum kvm_bus bus_idx,
struct kvm_ioeventfd *args)
{ {
enum kvm_bus bus_idx;
struct _ioeventfd *p, *tmp; struct _ioeventfd *p, *tmp;
struct eventfd_ctx *eventfd; struct eventfd_ctx *eventfd;
int ret = -ENOENT; int ret = -ENOENT;
bus_idx = ioeventfd_bus_from_flags(args->flags);
eventfd = eventfd_ctx_fdget(args->fd); eventfd = eventfd_ctx_fdget(args->fd);
if (IS_ERR(eventfd)) if (IS_ERR(eventfd))
return PTR_ERR(eventfd); return PTR_ERR(eventfd);
...@@ -901,10 +862,6 @@ kvm_deassign_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args) ...@@ -901,10 +862,6 @@ kvm_deassign_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
continue; continue;
kvm_io_bus_unregister_dev(kvm, bus_idx, &p->dev); kvm_io_bus_unregister_dev(kvm, bus_idx, &p->dev);
if (!p->length) {
kvm_io_bus_unregister_dev(kvm, KVM_FAST_MMIO_BUS,
&p->dev);
}
kvm->buses[bus_idx]->ioeventfd_count--; kvm->buses[bus_idx]->ioeventfd_count--;
ioeventfd_release(p); ioeventfd_release(p);
ret = 0; ret = 0;
...@@ -918,6 +875,71 @@ kvm_deassign_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args) ...@@ -918,6 +875,71 @@ kvm_deassign_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
return ret; return ret;
} }
static int kvm_deassign_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
{
enum kvm_bus bus_idx = ioeventfd_bus_from_flags(args->flags);
int ret = kvm_deassign_ioeventfd_idx(kvm, bus_idx, args);
if (!args->len && bus_idx == KVM_MMIO_BUS)
kvm_deassign_ioeventfd_idx(kvm, KVM_FAST_MMIO_BUS, args);
return ret;
}
static int
kvm_assign_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
{
enum kvm_bus bus_idx;
int ret;
bus_idx = ioeventfd_bus_from_flags(args->flags);
/* must be natural-word sized, or 0 to ignore length */
switch (args->len) {
case 0:
case 1:
case 2:
case 4:
case 8:
break;
default:
return -EINVAL;
}
/* check for range overflow */
if (args->addr + args->len < args->addr)
return -EINVAL;
/* check for extra flags that we don't understand */
if (args->flags & ~KVM_IOEVENTFD_VALID_FLAG_MASK)
return -EINVAL;
/* ioeventfd with no length can't be combined with DATAMATCH */
if (!args->len &&
args->flags & (KVM_IOEVENTFD_FLAG_PIO |
KVM_IOEVENTFD_FLAG_DATAMATCH))
return -EINVAL;
ret = kvm_assign_ioeventfd_idx(kvm, bus_idx, args);
if (ret)
goto fail;
/* When length is ignored, MMIO is also put on a separate bus, for
* faster lookups.
*/
if (!args->len && bus_idx == KVM_MMIO_BUS) {
ret = kvm_assign_ioeventfd_idx(kvm, KVM_FAST_MMIO_BUS, args);
if (ret < 0)
goto fast_fail;
}
return 0;
fast_fail:
kvm_deassign_ioeventfd_idx(kvm, bus_idx, args);
fail:
return ret;
}
int int
kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args) kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
{ {
......
...@@ -2004,6 +2004,7 @@ void kvm_vcpu_block(struct kvm_vcpu *vcpu) ...@@ -2004,6 +2004,7 @@ void kvm_vcpu_block(struct kvm_vcpu *vcpu)
if (vcpu->halt_poll_ns) { if (vcpu->halt_poll_ns) {
ktime_t stop = ktime_add_ns(ktime_get(), vcpu->halt_poll_ns); ktime_t stop = ktime_add_ns(ktime_get(), vcpu->halt_poll_ns);
++vcpu->stat.halt_attempted_poll;
do { do {
/* /*
* This sets KVM_REQ_UNHALT if an interrupt * This sets KVM_REQ_UNHALT if an interrupt
...@@ -2043,7 +2044,8 @@ void kvm_vcpu_block(struct kvm_vcpu *vcpu) ...@@ -2043,7 +2044,8 @@ void kvm_vcpu_block(struct kvm_vcpu *vcpu)
else if (vcpu->halt_poll_ns < halt_poll_ns && else if (vcpu->halt_poll_ns < halt_poll_ns &&
block_ns < halt_poll_ns) block_ns < halt_poll_ns)
grow_halt_poll_ns(vcpu); grow_halt_poll_ns(vcpu);
} } else
vcpu->halt_poll_ns = 0;
trace_kvm_vcpu_wakeup(block_ns, waited); trace_kvm_vcpu_wakeup(block_ns, waited);
} }
...@@ -3156,10 +3158,25 @@ static void kvm_io_bus_destroy(struct kvm_io_bus *bus) ...@@ -3156,10 +3158,25 @@ static void kvm_io_bus_destroy(struct kvm_io_bus *bus)
static inline int kvm_io_bus_cmp(const struct kvm_io_range *r1, static inline int kvm_io_bus_cmp(const struct kvm_io_range *r1,
const struct kvm_io_range *r2) const struct kvm_io_range *r2)
{ {
if (r1->addr < r2->addr) gpa_t addr1 = r1->addr;
gpa_t addr2 = r2->addr;
if (addr1 < addr2)
return -1; return -1;
if (r1->addr + r1->len > r2->addr + r2->len)
/* If r2->len == 0, match the exact address. If r2->len != 0,
* accept any overlapping write. Any order is acceptable for
* overlapping ranges, because kvm_io_bus_get_first_dev ensures
* we process all of them.
*/
if (r2->len) {
addr1 += r1->len;
addr2 += r2->len;
}
if (addr1 > addr2)
return 1; return 1;
return 0; return 0;
} }
......
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