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Commit d79095ee authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge git://git.kernel.org/pub/scm/virt/kvm/kvm 

Pull KVM bug fixes from Marcelo Tosatti:
 - Fix DS/ES segment register corruption on x86_32.
 - Fix kvmclock wallclock migration offset.
 - Fix PIT interrupt ACK vs system reset logic bug.

* git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: VMX: Fix ds/es corruption on i386 with preemption
  KVM: x86: apply kvmclock offset to guest wall clock time
  KVM: PIC: call ack notifiers for irqs that are dropped form irr
parents d667319a aa67f609

arch/x86/kvm/i8259.c

+17 −0
Original line number Diff line number Diff line
@@ -316,6 +316,11 @@ static void pic_ioport_write(void *opaque, u32 addr, u32 val) 
	addr &= 1;

	if (addr == 0) {

		if (val & 0x10) {

			u8 edge_irr = s->irr & ~s->elcr;

			int i;

			bool found;

			struct kvm_vcpu *vcpu;



			s->init4 = val & 1;

			s->last_irr = 0;

			s->irr &= s->elcr;
@@ -333,6 +338,18 @@ static void pic_ioport_write(void *opaque, u32 addr, u32 val) 
			if (val & 0x08)

				pr_pic_unimpl(

					"level sensitive irq not supported");



			kvm_for_each_vcpu(i, vcpu, s->pics_state->kvm)

				if (kvm_apic_accept_pic_intr(vcpu)) {

					found = true;

					break;

				}





			if (found)

				for (irq = 0; irq < PIC_NUM_PINS/2; irq++)

					if (edge_irr & (1 << irq))

						pic_clear_isr(s, irq);

		} else if (val & 0x08) {

			if (val & 0x04)

				s->poll = 1;

arch/x86/kvm/vmx.c

+13 −7
Original line number Diff line number Diff line
@@ -1488,13 +1488,6 @@ static void __vmx_load_host_state(struct vcpu_vmx *vmx) 
		loadsegment(ds, vmx->host_state.ds_sel);

		loadsegment(es, vmx->host_state.es_sel);

	}

#else

	/*

	 * The sysexit path does not restore ds/es, so we must set them to

	 * a reasonable value ourselves.

	 */

	loadsegment(ds, __USER_DS);

	loadsegment(es, __USER_DS);

#endif

	reload_tss();

#ifdef CONFIG_X86_64
@@ -6370,6 +6363,19 @@ static void __noclone vmx_vcpu_run(struct kvm_vcpu *vcpu) 
#endif

	      );



#ifndef CONFIG_X86_64

	/*

	 * The sysexit path does not restore ds/es, so we must set them to

	 * a reasonable value ourselves.

	 *

	 * We can't defer this to vmx_load_host_state() since that function

	 * may be executed in interrupt context, which saves and restore segments

	 * around it, nullifying its effect.

	 */

	loadsegment(ds, __USER_DS);

	loadsegment(es, __USER_DS);

#endif



	vcpu->arch.regs_avail = ~((1 << VCPU_REGS_RIP) | (1 << VCPU_REGS_RSP)

				  | (1 << VCPU_EXREG_RFLAGS)

				  | (1 << VCPU_EXREG_CPL)

arch/x86/kvm/x86.c

+4 −0
Original line number Diff line number Diff line
@@ -925,6 +925,10 @@ static void kvm_write_wall_clock(struct kvm *kvm, gpa_t wall_clock) 
	 */

	getboottime(&boot);



	if (kvm->arch.kvmclock_offset) {

		struct timespec ts = ns_to_timespec(kvm->arch.kvmclock_offset);

		boot = timespec_sub(boot, ts);

	}

	wc.sec = boot.tv_sec;

	wc.nsec = boot.tv_nsec;

	wc.version = version;