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Commit 541d8f4d authored by Linus Torvalds's avatar Linus Torvalds
Browse files

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

Pull KVM fixes from Paolo Bonzini:
 "Miscellaneous bugfixes.

  The ARM and s390 fixes are for new regressions from the merge window,
  others are usual stable material"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  compiler-gcc: disable -ftracer for __noclone functions
  kvm: x86: make lapic hrtimer pinned
  s390/mm/kvm: fix mis-merge in gmap handling
  kvm: set page dirty only if page has been writable
  KVM: x86: reduce default value of halt_poll_ns parameter
  KVM: Hyper-V: do not do hypercall userspace exits if SynIC is disabled
  KVM: x86: Inject pending interrupt even if pending nmi exist
  arm64: KVM: Register CPU notifiers when the kernel runs at HYP
  arm64: kvm: 4.6-rc1: Fix VTCR_EL2 VS setting
parents 5003bc6c 95272c29

arch/arm/kvm/arm.c

+33 −19
Original line number Diff line number Diff line
@@ -1061,15 +1061,27 @@ static void cpu_init_hyp_mode(void *dummy) 
	kvm_arm_init_debug();

}



static void cpu_hyp_reinit(void)

{

	if (is_kernel_in_hyp_mode()) {

		/*

		 * cpu_init_stage2() is safe to call even if the PM

		 * event was cancelled before the CPU was reset.

		 */

		cpu_init_stage2(NULL);

	} else {

		if (__hyp_get_vectors() == hyp_default_vectors)

			cpu_init_hyp_mode(NULL);

	}

}



static int hyp_init_cpu_notify(struct notifier_block *self,

			       unsigned long action, void *cpu)

{

	switch (action) {

	case CPU_STARTING:

	case CPU_STARTING_FROZEN:

		if (__hyp_get_vectors() == hyp_default_vectors)

			cpu_init_hyp_mode(NULL);

		break;

		cpu_hyp_reinit();

	}



	return NOTIFY_OK;
@@ -1084,9 +1096,8 @@ static int hyp_init_cpu_pm_notifier(struct notifier_block *self, 
				    unsigned long cmd,

				    void *v)

{

	if (cmd == CPU_PM_EXIT &&

	    __hyp_get_vectors() == hyp_default_vectors) {

		cpu_init_hyp_mode(NULL);

	if (cmd == CPU_PM_EXIT) {

		cpu_hyp_reinit();

		return NOTIFY_OK;

	}
@@ -1127,6 +1138,22 @@ static int init_subsystems(void) 
{

	int err;



	/*

	 * Register CPU Hotplug notifier

	 */

	cpu_notifier_register_begin();

	err = __register_cpu_notifier(&hyp_init_cpu_nb);

	cpu_notifier_register_done();

	if (err) {

		kvm_err("Cannot register KVM init CPU notifier (%d)\n", err);

		return err;

	}



	/*

	 * Register CPU lower-power notifier

	 */

	hyp_cpu_pm_init();



	/*

	 * Init HYP view of VGIC

	 */
@@ -1270,19 +1297,6 @@ static int init_hyp_mode(void) 
	free_boot_hyp_pgd();

#endif



	cpu_notifier_register_begin();



	err = __register_cpu_notifier(&hyp_init_cpu_nb);



	cpu_notifier_register_done();



	if (err) {

		kvm_err("Cannot register HYP init CPU notifier (%d)\n", err);

		goto out_err;

	}



	hyp_cpu_pm_init();



	/* set size of VMID supported by CPU */

	kvm_vmid_bits = kvm_get_vmid_bits();

	kvm_info("%d-bit VMID\n", kvm_vmid_bits);

arch/arm64/include/asm/kvm_arm.h

+3 −1
Original line number Diff line number Diff line
@@ -124,7 +124,9 @@ 
#define VTCR_EL2_SL0_LVL1	(1 << 6)

#define VTCR_EL2_T0SZ_MASK	0x3f

#define VTCR_EL2_T0SZ_40B	24

#define VTCR_EL2_VS		19

#define VTCR_EL2_VS_SHIFT	19

#define VTCR_EL2_VS_8BIT	(0 << VTCR_EL2_VS_SHIFT)

#define VTCR_EL2_VS_16BIT	(1 << VTCR_EL2_VS_SHIFT)



/*

 * We configure the Stage-2 page tables to always restrict the IPA space to be

arch/arm64/include/asm/sysreg.h

+3 −0
Original line number Diff line number Diff line
@@ -141,6 +141,9 @@ 
#define ID_AA64MMFR1_VMIDBITS_SHIFT	4

#define ID_AA64MMFR1_HADBS_SHIFT	0



#define ID_AA64MMFR1_VMIDBITS_8		0

#define ID_AA64MMFR1_VMIDBITS_16	2



/* id_aa64mmfr2 */

#define ID_AA64MMFR2_UAO_SHIFT		4

arch/arm64/kvm/hyp/s2-setup.c

+4 −2
Original line number Diff line number Diff line
@@ -36,8 +36,10 @@ void __hyp_text __init_stage2_translation(void) 
	 * Read the VMIDBits bits from ID_AA64MMFR1_EL1 and set the VS

	 * bit in VTCR_EL2.

	 */

	tmp = (read_sysreg(id_aa64mmfr1_el1) >> 4) & 0xf;

	val |= (tmp == 2) ? VTCR_EL2_VS : 0;

	tmp = (read_sysreg(id_aa64mmfr1_el1) >> ID_AA64MMFR1_VMIDBITS_SHIFT) & 0xf;

	val |= (tmp == ID_AA64MMFR1_VMIDBITS_16) ?

			VTCR_EL2_VS_16BIT :

			VTCR_EL2_VS_8BIT;



	write_sysreg(val, vtcr_el2);

}

arch/s390/mm/gmap.c

+2 −2
Original line number Diff line number Diff line
@@ -23,7 +23,7 @@ 
/**

 * gmap_alloc - allocate a guest address space

 * @mm: pointer to the parent mm_struct

 * @limit: maximum size of the gmap address space

 * @limit: maximum address of the gmap address space

 *

 * Returns a guest address space structure.

 */
@@ -292,7 +292,7 @@ int gmap_map_segment(struct gmap *gmap, unsigned long from, 
	if ((from | to | len) & (PMD_SIZE - 1))

		return -EINVAL;

	if (len == 0 || from + len < from || to + len < to ||

	    from + len > TASK_MAX_SIZE || to + len > gmap->asce_end)

	    from + len - 1 > TASK_MAX_SIZE || to + len - 1 > gmap->asce_end)

		return -EINVAL;



	flush = 0;