Merge tag 'powerpc-5.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc updates from Michael Ellerman:

 - Support for userspace to send requests directly to the on-chip GZIP
   accelerator on Power9.

 - Rework of our lockless page table walking (__find_linux_pte()) to
   make it safe against parallel page table manipulations without
   relying on an IPI for serialisation.

 - A series of fixes & enhancements to make our machine check handling
   more robust.

 - Lots of plumbing to add support for "prefixed" (64-bit) instructions
   on Power10.

 - Support for using huge pages for the linear mapping on 8xx (32-bit).

 - Remove obsolete Xilinx PPC405/PPC440 support, and an associated sound
   driver.

 - Removal of some obsolete 40x platforms and associated cruft.

 - Initial support for booting on Power10.

 - Lots of other small features, cleanups & fixes.

Thanks to: Alexey Kardashevskiy, Alistair Popple, Andrew Donnellan,
Andrey Abramov, Aneesh Kumar K.V, Balamuruhan S, Bharata B Rao, Bulent
Abali, Cédric Le Goater, Chen Zhou, Christian Zigotzky, Christophe
JAILLET, Christophe Leroy, Dmitry Torokhov, Emmanuel Nicolet, Erhard F.,
Gautham R. Shenoy, Geoff Levand, George Spelvin, Greg Kurz, Gustavo A.
R. Silva, Gustavo Walbon, Haren Myneni, Hari Bathini, Joel Stanley,
Jordan Niethe, Kajol Jain, Kees Cook, Leonardo Bras, Madhavan
Srinivasan., Mahesh Salgaonkar, Markus Elfring, Michael Neuling, Michal
Simek, Nathan Chancellor, Nathan Lynch, Naveen N. Rao, Nicholas Piggin,
Oliver O'Halloran, Paul Mackerras, Pingfan Liu, Qian Cai, Ram Pai,
Raphael Moreira Zinsly, Ravi Bangoria, Sam Bobroff, Sandipan Das, Segher
Boessenkool, Stephen Rothwell, Sukadev Bhattiprolu, Tyrel Datwyler,
Wolfram Sang, Xiongfeng Wang.

* tag 'powerpc-5.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (299 commits)
  powerpc/pseries: Make vio and ibmebus initcalls pseries specific
  cxl: Remove dead Kconfig options
  powerpc: Add POWER10 architected mode
  powerpc/dt_cpu_ftrs: Add MMA feature
  powerpc/dt_cpu_ftrs: Enable Prefixed Instructions
  powerpc/dt_cpu_ftrs: Advertise support for ISA v3.1 if selected
  powerpc: Add support for ISA v3.1
  powerpc: Add new HWCAP bits
  powerpc/64s: Don't set FSCR bits in INIT_THREAD
  powerpc/64s: Save FSCR to init_task.thread.fscr after feature init
  powerpc/64s: Don't let DT CPU features set FSCR_DSCR
  powerpc/64s: Don't init FSCR_DSCR in __init_FSCR()
  powerpc/32s: Fix another build failure with CONFIG_PPC_KUAP_DEBUG
  powerpc/module_64: Use special stub for _mcount() with -mprofile-kernel
  powerpc/module_64: Simplify check for -mprofile-kernel ftrace relocations
  powerpc/module_64: Consolidate ftrace code
  powerpc/32: Disable KASAN with pages bigger than 16k
  powerpc/uaccess: Don't set KUEP by default on book3s/32
  powerpc/uaccess: Don't set KUAP by default on book3s/32
  powerpc/8xx: Reduce time spent in allow_user_access() and friends
  ...

1 files changed, 20 insertions, 40 deletions

diff --git a/arch/powerpc/kvm/book3s_hv_rm_mmu.c b/arch/powerpc/kvm/book3s_hv_rm_mmu.c
index 220305454c23..88da2764c1bb 100644
--- a/arch/powerpc/kvm/book3s_hv_rm_mmu.c
+++ b/arch/powerpc/kvm/book3s_hv_rm_mmu.c
@@ -210,7 +210,7 @@ long kvmppc_do_h_enter(struct kvm *kvm, unsigned long flags,
 	pte_t *ptep;
 	unsigned int writing;
 	unsigned long mmu_seq;
-	unsigned long rcbits, irq_flags = 0;
+	unsigned long rcbits;
 
 	if (kvm_is_radix(kvm))
 		return H_FUNCTION;
@@ -248,17 +248,9 @@ long kvmppc_do_h_enter(struct kvm *kvm, unsigned long flags,
 
 	/* Translate to host virtual address */
 	hva = __gfn_to_hva_memslot(memslot, gfn);
-	/*
-	 * If we had a page table table change after lookup, we would
-	 * retry via mmu_notifier_retry.
-	 */
-	if (!realmode)
-		local_irq_save(irq_flags);
-	/*
-	 * If called in real mode we have MSR_EE = 0. Otherwise
-	 * we disable irq above.
-	 */
-	ptep = __find_linux_pte(pgdir, hva, NULL, &hpage_shift);
+
+	arch_spin_lock(&kvm->mmu_lock.rlock.raw_lock);
+	ptep = find_kvm_host_pte(kvm, mmu_seq, hva, &hpage_shift);
 	if (ptep) {
 		pte_t pte;
 		unsigned int host_pte_size;
@@ -272,8 +264,7 @@ long kvmppc_do_h_enter(struct kvm *kvm, unsigned long flags,
 		 * to <= host page size, if host is using hugepage
 		 */
 		if (host_pte_size < psize) {
-			if (!realmode)
-				local_irq_restore(flags);
+			arch_spin_unlock(&kvm->mmu_lock.rlock.raw_lock);
 			return H_PARAMETER;
 		}
 		pte = kvmppc_read_update_linux_pte(ptep, writing);
@@ -287,8 +278,7 @@ long kvmppc_do_h_enter(struct kvm *kvm, unsigned long flags,
 			pa |= gpa & ~PAGE_MASK;
 		}
 	}
-	if (!realmode)
-		local_irq_restore(irq_flags);
+	arch_spin_unlock(&kvm->mmu_lock.rlock.raw_lock);
 
 	ptel &= HPTE_R_KEY | HPTE_R_PP0 | (psize-1);
 	ptel |= pa;
@@ -888,8 +878,8 @@ long kvmppc_h_clear_mod(struct kvm_vcpu *vcpu, unsigned long flags,
 	return ret;
 }
 
-static int kvmppc_get_hpa(struct kvm_vcpu *vcpu, unsigned long gpa,
-			  int writing, unsigned long *hpa,
+static int kvmppc_get_hpa(struct kvm_vcpu *vcpu, unsigned long mmu_seq,
+			  unsigned long gpa, int writing, unsigned long *hpa,
 			  struct kvm_memory_slot **memslot_p)
 {
 	struct kvm *kvm = vcpu->kvm;
@@ -908,7 +898,7 @@ static int kvmppc_get_hpa(struct kvm_vcpu *vcpu, unsigned long gpa,
 	hva = __gfn_to_hva_memslot(memslot, gfn);
 
 	/* Try to find the host pte for that virtual address */
-	ptep = __find_linux_pte(vcpu->arch.pgdir, hva, NULL, &shift);
+	ptep = find_kvm_host_pte(kvm, mmu_seq, hva, &shift);
 	if (!ptep)
 		return H_TOO_HARD;
 	pte = kvmppc_read_update_linux_pte(ptep, writing);
@@ -943,16 +933,11 @@ static long kvmppc_do_h_page_init_zero(struct kvm_vcpu *vcpu,
 	mmu_seq = kvm->mmu_notifier_seq;
 	smp_rmb();
 
-	ret = kvmppc_get_hpa(vcpu, dest, 1, &pa, &memslot);
-	if (ret != H_SUCCESS)
-		return ret;
+	arch_spin_lock(&kvm->mmu_lock.rlock.raw_lock);
 
-	/* Check if we've been invalidated */
-	raw_spin_lock(&kvm->mmu_lock.rlock);
-	if (mmu_notifier_retry(kvm, mmu_seq)) {
-		ret = H_TOO_HARD;
+	ret = kvmppc_get_hpa(vcpu, mmu_seq, dest, 1, &pa, &memslot);
+	if (ret != H_SUCCESS)
 		goto out_unlock;
-	}
 
 	/* Zero the page */
 	for (i = 0; i < SZ_4K; i += L1_CACHE_BYTES, pa += L1_CACHE_BYTES)
@@ -960,7 +945,7 @@ static long kvmppc_do_h_page_init_zero(struct kvm_vcpu *vcpu,
 	kvmppc_update_dirty_map(memslot, dest >> PAGE_SHIFT, PAGE_SIZE);
 
 out_unlock:
-	raw_spin_unlock(&kvm->mmu_lock.rlock);
+	arch_spin_unlock(&kvm->mmu_lock.rlock.raw_lock);
 	return ret;
 }
 
@@ -976,19 +961,14 @@ static long kvmppc_do_h_page_init_copy(struct kvm_vcpu *vcpu,
 	mmu_seq = kvm->mmu_notifier_seq;
 	smp_rmb();
 
-	ret = kvmppc_get_hpa(vcpu, dest, 1, &dest_pa, &dest_memslot);
-	if (ret != H_SUCCESS)
-		return ret;
-	ret = kvmppc_get_hpa(vcpu, src, 0, &src_pa, NULL);
+	arch_spin_lock(&kvm->mmu_lock.rlock.raw_lock);
+	ret = kvmppc_get_hpa(vcpu, mmu_seq, dest, 1, &dest_pa, &dest_memslot);
 	if (ret != H_SUCCESS)
-		return ret;
+		goto out_unlock;
 
-	/* Check if we've been invalidated */
-	raw_spin_lock(&kvm->mmu_lock.rlock);
-	if (mmu_notifier_retry(kvm, mmu_seq)) {
-		ret = H_TOO_HARD;
+	ret = kvmppc_get_hpa(vcpu, mmu_seq, src, 0, &src_pa, NULL);
+	if (ret != H_SUCCESS)
 		goto out_unlock;
-	}
 
 	/* Copy the page */
 	memcpy((void *)dest_pa, (void *)src_pa, SZ_4K);
@@ -996,7 +976,7 @@ static long kvmppc_do_h_page_init_copy(struct kvm_vcpu *vcpu,
 	kvmppc_update_dirty_map(dest_memslot, dest >> PAGE_SHIFT, PAGE_SIZE);
 
 out_unlock:
-	raw_spin_unlock(&kvm->mmu_lock.rlock);
+	arch_spin_unlock(&kvm->mmu_lock.rlock.raw_lock);
 	return ret;
 }
 
@@ -1260,7 +1240,7 @@ long kvmppc_hpte_hv_fault(struct kvm_vcpu *vcpu, unsigned long addr,
 	status &= ~DSISR_NOHPTE;	/* DSISR_NOHPTE == SRR1_ISI_NOPT */
 	if (!data) {
 		if (gr & (HPTE_R_N | HPTE_R_G))
-			return status | SRR1_ISI_N_OR_G;
+			return status | SRR1_ISI_N_G_OR_CIP;
 		if (!hpte_read_permission(pp, slb_v & key))
 			return status | SRR1_ISI_PROT;
 	} else if (status & DSISR_ISSTORE) {