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

Pull KVM updates from Paolo Bonzini:
 "PPC changes will come next week.

   - s390: Support for runtime instrumentation within guests, support of
     248 VCPUs.

   - ARM: rewrite of the arm64 world switch in C, support for 16-bit VM
     identifiers.  Performance counter virtualization missed the boat.

   - x86: Support for more Hyper-V features (synthetic interrupt
     controller), MMU cleanups"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (115 commits)
  kvm: x86: Fix vmwrite to SECONDARY_VM_EXEC_CONTROL
  kvm/x86: Hyper-V SynIC timers tracepoints
  kvm/x86: Hyper-V SynIC tracepoints
  kvm/x86: Update SynIC timers on guest entry only
  kvm/x86: Skip SynIC vector check for QEMU side
  kvm/x86: Hyper-V fix SynIC timer disabling condition
  kvm/x86: Reorg stimer_expiration() to better control timer restart
  kvm/x86: Hyper-V unify stimer_start() and stimer_restart()
  kvm/x86: Drop stimer_stop() function
  kvm/x86: Hyper-V timers fix incorrect logical operation
  KVM: move architecture-dependent requests to arch/
  KVM: renumber vcpu->request bits
  KVM: document which architecture uses each request bit
  KVM: Remove unused KVM_REQ_KICK to save a bit in vcpu->requests
  kvm: x86: Check kvm_write_guest return value in kvm_write_wall_clock
  KVM: s390: implement the RI support of guest
  kvm/s390: drop unpaired smp_mb
  kvm: x86: fix comment about {mmu,nested_mmu}.gva_to_gpa
  KVM: x86: MMU: Use clear_page() instead of init_shadow_page_table()
  arm/arm64: KVM: Detect vGIC presence at runtime
  ...

1 files changed, 138 insertions, 0 deletions

diff --git a/arch/arm64/kvm/hyp/sysreg-sr.c b/arch/arm64/kvm/hyp/sysreg-sr.c
new file mode 100644
index 000000000000..425630980229
--- /dev/null
+++ b/arch/arm64/kvm/hyp/sysreg-sr.c
@@ -0,0 +1,138 @@
+/*
+ * Copyright (C) 2012-2015 - ARM Ltd
+ * Author: Marc Zyngier <marc.zyngier@arm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/compiler.h>
+#include <linux/kvm_host.h>
+
+#include <asm/kvm_asm.h>
+#include <asm/kvm_mmu.h>
+
+#include "hyp.h"
+
+/* ctxt is already in the HYP VA space */
+void __hyp_text __sysreg_save_state(struct kvm_cpu_context *ctxt)
+{
+	ctxt->sys_regs[MPIDR_EL1]	= read_sysreg(vmpidr_el2);
+	ctxt->sys_regs[CSSELR_EL1]	= read_sysreg(csselr_el1);
+	ctxt->sys_regs[SCTLR_EL1]	= read_sysreg(sctlr_el1);
+	ctxt->sys_regs[ACTLR_EL1]	= read_sysreg(actlr_el1);
+	ctxt->sys_regs[CPACR_EL1]	= read_sysreg(cpacr_el1);
+	ctxt->sys_regs[TTBR0_EL1]	= read_sysreg(ttbr0_el1);
+	ctxt->sys_regs[TTBR1_EL1]	= read_sysreg(ttbr1_el1);
+	ctxt->sys_regs[TCR_EL1]		= read_sysreg(tcr_el1);
+	ctxt->sys_regs[ESR_EL1]		= read_sysreg(esr_el1);
+	ctxt->sys_regs[AFSR0_EL1]	= read_sysreg(afsr0_el1);
+	ctxt->sys_regs[AFSR1_EL1]	= read_sysreg(afsr1_el1);
+	ctxt->sys_regs[FAR_EL1]		= read_sysreg(far_el1);
+	ctxt->sys_regs[MAIR_EL1]	= read_sysreg(mair_el1);
+	ctxt->sys_regs[VBAR_EL1]	= read_sysreg(vbar_el1);
+	ctxt->sys_regs[CONTEXTIDR_EL1]	= read_sysreg(contextidr_el1);
+	ctxt->sys_regs[TPIDR_EL0]	= read_sysreg(tpidr_el0);
+	ctxt->sys_regs[TPIDRRO_EL0]	= read_sysreg(tpidrro_el0);
+	ctxt->sys_regs[TPIDR_EL1]	= read_sysreg(tpidr_el1);
+	ctxt->sys_regs[AMAIR_EL1]	= read_sysreg(amair_el1);
+	ctxt->sys_regs[CNTKCTL_EL1]	= read_sysreg(cntkctl_el1);
+	ctxt->sys_regs[PAR_EL1]		= read_sysreg(par_el1);
+	ctxt->sys_regs[MDSCR_EL1]	= read_sysreg(mdscr_el1);
+
+	ctxt->gp_regs.regs.sp		= read_sysreg(sp_el0);
+	ctxt->gp_regs.regs.pc		= read_sysreg(elr_el2);
+	ctxt->gp_regs.regs.pstate	= read_sysreg(spsr_el2);
+	ctxt->gp_regs.sp_el1		= read_sysreg(sp_el1);
+	ctxt->gp_regs.elr_el1		= read_sysreg(elr_el1);
+	ctxt->gp_regs.spsr[KVM_SPSR_EL1]= read_sysreg(spsr_el1);
+}
+
+void __hyp_text __sysreg_restore_state(struct kvm_cpu_context *ctxt)
+{
+	write_sysreg(ctxt->sys_regs[MPIDR_EL1],	  vmpidr_el2);
+	write_sysreg(ctxt->sys_regs[CSSELR_EL1],  csselr_el1);
+	write_sysreg(ctxt->sys_regs[SCTLR_EL1],	  sctlr_el1);
+	write_sysreg(ctxt->sys_regs[ACTLR_EL1],	  actlr_el1);
+	write_sysreg(ctxt->sys_regs[CPACR_EL1],	  cpacr_el1);
+	write_sysreg(ctxt->sys_regs[TTBR0_EL1],	  ttbr0_el1);
+	write_sysreg(ctxt->sys_regs[TTBR1_EL1],	  ttbr1_el1);
+	write_sysreg(ctxt->sys_regs[TCR_EL1],	  tcr_el1);
+	write_sysreg(ctxt->sys_regs[ESR_EL1],	  esr_el1);
+	write_sysreg(ctxt->sys_regs[AFSR0_EL1],	  afsr0_el1);
+	write_sysreg(ctxt->sys_regs[AFSR1_EL1],	  afsr1_el1);
+	write_sysreg(ctxt->sys_regs[FAR_EL1],	  far_el1);
+	write_sysreg(ctxt->sys_regs[MAIR_EL1],	  mair_el1);
+	write_sysreg(ctxt->sys_regs[VBAR_EL1],	  vbar_el1);
+	write_sysreg(ctxt->sys_regs[CONTEXTIDR_EL1], contextidr_el1);
+	write_sysreg(ctxt->sys_regs[TPIDR_EL0],	  tpidr_el0);
+	write_sysreg(ctxt->sys_regs[TPIDRRO_EL0], tpidrro_el0);
+	write_sysreg(ctxt->sys_regs[TPIDR_EL1],	  tpidr_el1);
+	write_sysreg(ctxt->sys_regs[AMAIR_EL1],	  amair_el1);
+	write_sysreg(ctxt->sys_regs[CNTKCTL_EL1], cntkctl_el1);
+	write_sysreg(ctxt->sys_regs[PAR_EL1],	  par_el1);
+	write_sysreg(ctxt->sys_regs[MDSCR_EL1],	  mdscr_el1);
+
+	write_sysreg(ctxt->gp_regs.regs.sp,	sp_el0);
+	write_sysreg(ctxt->gp_regs.regs.pc,	elr_el2);
+	write_sysreg(ctxt->gp_regs.regs.pstate,	spsr_el2);
+	write_sysreg(ctxt->gp_regs.sp_el1,	sp_el1);
+	write_sysreg(ctxt->gp_regs.elr_el1,	elr_el1);
+	write_sysreg(ctxt->gp_regs.spsr[KVM_SPSR_EL1], spsr_el1);
+}
+
+void __hyp_text __sysreg32_save_state(struct kvm_vcpu *vcpu)
+{
+	u64 *spsr, *sysreg;
+
+	if (read_sysreg(hcr_el2) & HCR_RW)
+		return;
+
+	spsr = vcpu->arch.ctxt.gp_regs.spsr;
+	sysreg = vcpu->arch.ctxt.sys_regs;
+
+	spsr[KVM_SPSR_ABT] = read_sysreg(spsr_abt);
+	spsr[KVM_SPSR_UND] = read_sysreg(spsr_und);
+	spsr[KVM_SPSR_IRQ] = read_sysreg(spsr_irq);
+	spsr[KVM_SPSR_FIQ] = read_sysreg(spsr_fiq);
+
+	sysreg[DACR32_EL2] = read_sysreg(dacr32_el2);
+	sysreg[IFSR32_EL2] = read_sysreg(ifsr32_el2);
+
+	if (__fpsimd_enabled())
+		sysreg[FPEXC32_EL2] = read_sysreg(fpexc32_el2);
+
+	if (vcpu->arch.debug_flags & KVM_ARM64_DEBUG_DIRTY)
+		sysreg[DBGVCR32_EL2] = read_sysreg(dbgvcr32_el2);
+}
+
+void __hyp_text __sysreg32_restore_state(struct kvm_vcpu *vcpu)
+{
+	u64 *spsr, *sysreg;
+
+	if (read_sysreg(hcr_el2) & HCR_RW)
+		return;
+
+	spsr = vcpu->arch.ctxt.gp_regs.spsr;
+	sysreg = vcpu->arch.ctxt.sys_regs;
+
+	write_sysreg(spsr[KVM_SPSR_ABT], spsr_abt);
+	write_sysreg(spsr[KVM_SPSR_UND], spsr_und);
+	write_sysreg(spsr[KVM_SPSR_IRQ], spsr_irq);
+	write_sysreg(spsr[KVM_SPSR_FIQ], spsr_fiq);
+
+	write_sysreg(sysreg[DACR32_EL2], dacr32_el2);
+	write_sysreg(sysreg[IFSR32_EL2], ifsr32_el2);
+
+	if (vcpu->arch.debug_flags & KVM_ARM64_DEBUG_DIRTY)
+		write_sysreg(sysreg[DBGVCR32_EL2], dbgvcr32_el2);
+}