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Commit 2d62e076 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'kvm-4.11-2' of git://git.kernel.org/pub/scm/virt/kvm/kvm 

Pull more KVM updates from Radim Krčmář:
 "Second batch of KVM changes for the 4.11 merge window:

  PPC:
   - correct assumption about ASDR on POWER9
   - fix MMIO emulation on POWER9

  x86:
   - add a simple test for ioperm
   - cleanup TSS (going through KVM tree as the whole undertaking was
     caused by VMX's use of TSS)
   - fix nVMX interrupt delivery
   - fix some performance counters in the guest

  ... and two cleanup patches"

* tag 'kvm-4.11-2' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: nVMX: Fix pending events injection
  x86/kvm/vmx: remove unused variable in segment_base()
  selftests/x86: Add a basic selftest for ioperm
  x86/asm: Tidy up TSS limit code
  kvm: convert kvm.users_count from atomic_t to refcount_t
  KVM: x86: never specify a sample period for virtualized in_tx_cp counters
  KVM: PPC: Book3S HV: Don't use ASDR for real-mode HPT faults on POWER9
  KVM: PPC: Book3S HV: Fix software walk of guest process page tables
parents be834aaf 16ce771b

arch/powerpc/include/asm/book3s/64/mmu.h

+2 −1
Original line number Diff line number Diff line
@@ -46,7 +46,7 @@ extern struct patb_entry *partition_tb; 


/* Bits in patb0 field */

#define PATB_HR		(1UL << 63)

#define RPDB_MASK	0x0ffffffffffff00fUL

#define RPDB_MASK	0x0fffffffffffff00UL

#define RPDB_SHIFT	(1UL << 8)

#define RTS1_SHIFT	61		/* top 2 bits of radix tree size */

#define RTS1_MASK	(3UL << RTS1_SHIFT)
@@ -57,6 +57,7 @@ extern struct patb_entry *partition_tb; 
/* Bits in patb1 field */

#define PATB_GR		(1UL << 63)	/* guest uses radix; must match HR */

#define PRTS_MASK	0x1f		/* process table size field */

#define PRTB_MASK	0x0ffffffffffff000UL



/*

 * Limit process table to PAGE_SIZE table. This

arch/powerpc/kvm/book3s_64_mmu_radix.c

+3 −2
Original line number Diff line number Diff line
@@ -32,6 +32,7 @@ int kvmppc_mmu_radix_xlate(struct kvm_vcpu *vcpu, gva_t eaddr, 
	u32 pid;

	int ret, level, ps;

	__be64 prte, rpte;

	unsigned long ptbl;

	unsigned long root, pte, index;

	unsigned long rts, bits, offset;

	unsigned long gpa;
@@ -53,8 +54,8 @@ int kvmppc_mmu_radix_xlate(struct kvm_vcpu *vcpu, gva_t eaddr, 
		return -EINVAL;



	/* Read partition table to find root of tree for effective PID */

	ret = kvm_read_guest(kvm, kvm->arch.process_table + pid * 16,

			     &prte, sizeof(prte));

	ptbl = (kvm->arch.process_table & PRTB_MASK) + (pid * 16);

	ret = kvm_read_guest(kvm, ptbl, &prte, sizeof(prte));

	if (ret)

		return ret;

arch/powerpc/kvm/book3s_hv_rmhandlers.S

+4 −4
Original line number Diff line number Diff line
@@ -1787,12 +1787,12 @@ kvmppc_hdsi: 
	/* HPTE not found fault or protection fault? */

	andis.	r0, r6, (DSISR_NOHPTE | DSISR_PROTFAULT)@h

	beq	1f			/* if not, send it to the guest */

	andi.	r0, r11, MSR_DR		/* data relocation enabled? */

	beq	3f

BEGIN_FTR_SECTION

	mfspr	r5, SPRN_ASDR		/* on POWER9, use ASDR to get VSID */

	b	4f

END_FTR_SECTION_IFSET(CPU_FTR_ARCH_300)

	andi.	r0, r11, MSR_DR		/* data relocation enabled? */

	beq	3f

	clrrdi	r0, r4, 28

	PPC_SLBFEE_DOT(R5, R0)		/* if so, look up SLB */

	li	r0, BOOK3S_INTERRUPT_DATA_SEGMENT
@@ -1879,12 +1879,12 @@ kvmppc_hisi: 
	bne	.Lradix_hisi		/* for radix, just save ASDR */

	andis.	r0, r11, SRR1_ISI_NOPT@h

	beq	1f

	andi.	r0, r11, MSR_IR		/* instruction relocation enabled? */

	beq	3f

BEGIN_FTR_SECTION

	mfspr	r5, SPRN_ASDR		/* on POWER9, use ASDR to get VSID */

	b	4f

END_FTR_SECTION_IFSET(CPU_FTR_ARCH_300)

	andi.	r0, r11, MSR_IR		/* instruction relocation enabled? */

	beq	3f

	clrrdi	r0, r10, 28

	PPC_SLBFEE_DOT(R5, R0)		/* if so, look up SLB */

	li	r0, BOOK3S_INTERRUPT_INST_SEGMENT

arch/x86/include/asm/desc.h

+11 −7
Original line number Diff line number Diff line
@@ -205,6 +205,8 @@ static inline void native_load_tr_desc(void) 
	asm volatile("ltr %w0"::"q" (GDT_ENTRY_TSS*8));

}



DECLARE_PER_CPU(bool, __tss_limit_invalid);



static inline void force_reload_TR(void)

{

	struct desc_struct *d = get_cpu_gdt_table(smp_processor_id());
@@ -220,18 +222,20 @@ static inline void force_reload_TR(void) 
	write_gdt_entry(d, GDT_ENTRY_TSS, &tss, DESC_TSS);



	load_TR_desc();

	this_cpu_write(__tss_limit_invalid, false);

}



DECLARE_PER_CPU(bool, need_tr_refresh);



static inline void refresh_TR(void)

/*

 * Call this if you need the TSS limit to be correct, which should be the case

 * if and only if you have TIF_IO_BITMAP set or you're switching to a task

 * with TIF_IO_BITMAP set.

 */

static inline void refresh_tss_limit(void)

{

	DEBUG_LOCKS_WARN_ON(preemptible());



	if (unlikely(this_cpu_read(need_tr_refresh))) {

	if (unlikely(this_cpu_read(__tss_limit_invalid)))

		force_reload_TR();

		this_cpu_write(need_tr_refresh, false);

	}

}



/*
@@ -250,7 +254,7 @@ static inline void invalidate_tss_limit(void) 
	if (unlikely(test_thread_flag(TIF_IO_BITMAP)))

		force_reload_TR();

	else

		this_cpu_write(need_tr_refresh, true);

		this_cpu_write(__tss_limit_invalid, true);

}



static inline void native_load_gdt(const struct desc_ptr *dtr)

arch/x86/kernel/ioport.c

+7 −1
Original line number Diff line number Diff line
@@ -48,8 +48,14 @@ asmlinkage long sys_ioperm(unsigned long from, unsigned long num, int turn_on) 
		t->io_bitmap_ptr = bitmap;

		set_thread_flag(TIF_IO_BITMAP);



		/*

		 * Now that we have an IO bitmap, we need our TSS limit to be

		 * correct.  It's fine if we are preempted after doing this:

		 * with TIF_IO_BITMAP set, context switches will keep our TSS

		 * limit correct.

		 */

		preempt_disable();

		refresh_TR();

		refresh_tss_limit();

		preempt_enable();

	}