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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /arch/powerpc/kvm/book3s_64_vio_hv.c
Initial import
Diffstat (limited to 'arch/powerpc/kvm/book3s_64_vio_hv.c')
-rw-r--r--arch/powerpc/kvm/book3s_64_vio_hv.c105
1 files changed, 105 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/book3s_64_vio_hv.c b/arch/powerpc/kvm/book3s_64_vio_hv.c
new file mode 100644
index 000000000..89e96b3e0
--- /dev/null
+++ b/arch/powerpc/kvm/book3s_64_vio_hv.c
@@ -0,0 +1,105 @@
+/*
+ * 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, write to the Free Software
+ * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * Copyright 2010 Paul Mackerras, IBM Corp. <paulus@au1.ibm.com>
+ * Copyright 2011 David Gibson, IBM Corporation <dwg@au1.ibm.com>
+ */
+
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/kvm.h>
+#include <linux/kvm_host.h>
+#include <linux/highmem.h>
+#include <linux/gfp.h>
+#include <linux/slab.h>
+#include <linux/hugetlb.h>
+#include <linux/list.h>
+
+#include <asm/tlbflush.h>
+#include <asm/kvm_ppc.h>
+#include <asm/kvm_book3s.h>
+#include <asm/mmu-hash64.h>
+#include <asm/hvcall.h>
+#include <asm/synch.h>
+#include <asm/ppc-opcode.h>
+#include <asm/kvm_host.h>
+#include <asm/udbg.h>
+
+#define TCES_PER_PAGE (PAGE_SIZE / sizeof(u64))
+
+/* WARNING: This will be called in real-mode on HV KVM and virtual
+ * mode on PR KVM
+ */
+long kvmppc_h_put_tce(struct kvm_vcpu *vcpu, unsigned long liobn,
+ unsigned long ioba, unsigned long tce)
+{
+ struct kvm *kvm = vcpu->kvm;
+ struct kvmppc_spapr_tce_table *stt;
+
+ /* udbg_printf("H_PUT_TCE(): liobn=0x%lx ioba=0x%lx, tce=0x%lx\n", */
+ /* liobn, ioba, tce); */
+
+ list_for_each_entry(stt, &kvm->arch.spapr_tce_tables, list) {
+ if (stt->liobn == liobn) {
+ unsigned long idx = ioba >> SPAPR_TCE_SHIFT;
+ struct page *page;
+ u64 *tbl;
+
+ /* udbg_printf("H_PUT_TCE: liobn 0x%lx => stt=%p window_size=0x%x\n", */
+ /* liobn, stt, stt->window_size); */
+ if (ioba >= stt->window_size)
+ return H_PARAMETER;
+
+ page = stt->pages[idx / TCES_PER_PAGE];
+ tbl = (u64 *)page_address(page);
+
+ /* FIXME: Need to validate the TCE itself */
+ /* udbg_printf("tce @ %p\n", &tbl[idx % TCES_PER_PAGE]); */
+ tbl[idx % TCES_PER_PAGE] = tce;
+ return H_SUCCESS;
+ }
+ }
+
+ /* Didn't find the liobn, punt it to userspace */
+ return H_TOO_HARD;
+}
+EXPORT_SYMBOL_GPL(kvmppc_h_put_tce);
+
+long kvmppc_h_get_tce(struct kvm_vcpu *vcpu, unsigned long liobn,
+ unsigned long ioba)
+{
+ struct kvm *kvm = vcpu->kvm;
+ struct kvmppc_spapr_tce_table *stt;
+
+ list_for_each_entry(stt, &kvm->arch.spapr_tce_tables, list) {
+ if (stt->liobn == liobn) {
+ unsigned long idx = ioba >> SPAPR_TCE_SHIFT;
+ struct page *page;
+ u64 *tbl;
+
+ if (ioba >= stt->window_size)
+ return H_PARAMETER;
+
+ page = stt->pages[idx / TCES_PER_PAGE];
+ tbl = (u64 *)page_address(page);
+
+ vcpu->arch.gpr[4] = tbl[idx % TCES_PER_PAGE];
+ return H_SUCCESS;
+ }
+ }
+
+ /* Didn't find the liobn, punt it to userspace */
+ return H_TOO_HARD;
+}
+EXPORT_SYMBOL_GPL(kvmppc_h_get_tce);