From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mtagate3.de.ibm.com (mtagate3.de.ibm.com [195.212.29.152]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "mtagate3.de.ibm.com", Issuer "Equifax" (verified OK)) by ozlabs.org (Postfix) with ESMTPS id 03F02DDED0 for ; Wed, 23 Jul 2008 18:37:16 +1000 (EST) Received: from d12nrmr1607.megacenter.de.ibm.com (d12nrmr1607.megacenter.de.ibm.com [9.149.167.49]) by mtagate3.de.ibm.com (8.13.8/8.13.8) with ESMTP id m6N8amvU284306 for ; Wed, 23 Jul 2008 08:36:48 GMT Received: from d12av03.megacenter.de.ibm.com (d12av03.megacenter.de.ibm.com [9.149.165.213]) by d12nrmr1607.megacenter.de.ibm.com (8.13.8/8.13.8/NCO v9.0) with ESMTP id m6N8alu01937630 for ; Wed, 23 Jul 2008 10:36:48 +0200 Received: from d12av03.megacenter.de.ibm.com (loopback [127.0.0.1]) by d12av03.megacenter.de.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id m6N8alYw021882 for ; Wed, 23 Jul 2008 10:36:47 +0200 From: ehrhardt@linux.vnet.ibm.com To: kvm-ppc@vger.kernel.org, embedded-hypervisor@power.org, linuxppc-dev@ozlabs.org Subject: [PATCH 6/6] kvmppc: kvm-userspace: device tree modification for magicpage Date: Wed, 23 Jul 2008 10:36:47 +0200 Message-Id: <1216802207-32675-7-git-send-email-ehrhardt@linux.vnet.ibm.com> In-Reply-To: <1216802207-32675-1-git-send-email-ehrhardt@linux.vnet.ibm.com> References: <1216802207-32675-1-git-send-email-ehrhardt@linux.vnet.ibm.com> Cc: hollisb@us.ibm.com List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Christian Ehrhardt This patch to kvm-userspace connects the other host & guest patches in this series. On guest initialization it checks the hosts capabilities for the magicpage mechanism. If available the device tree passed to the guest gets the "hypervisor" node added and in that node the feature flag and the requested magic page size (read from the host kernel via an ioctl) is stored. Signed-off-by: Christian Ehrhardt --- [diffstat] libkvm/libkvm-powerpc.c | 6 ++++++ libkvm/libkvm.h | 6 ++++++ qemu/hw/device_tree.c | 10 ++++++++++ qemu/hw/device_tree.h | 1 + qemu/hw/ppc440_bamboo.c | 15 +++++++++++++++ qemu/qemu-kvm-powerpc.c | 5 +++++ qemu/qemu-kvm.h | 1 + 7 files changed, 44 insertions(+) [diff] diff --git a/libkvm/libkvm-powerpc.c b/libkvm/libkvm-powerpc.c --- a/libkvm/libkvm-powerpc.c +++ b/libkvm/libkvm-powerpc.c @@ -19,6 +19,7 @@ #include "libkvm.h" #include "kvm-powerpc.h" +#include #include #include #include @@ -105,6 +106,11 @@ return 0; } +int kvm_get_magicpage_size(kvm_context_t kvm) +{ + return ioctl(kvm->fd, KVM_GET_PPCPV_MAGICPAGE_SIZE, 0); +} + int kvm_arch_run(struct kvm_run *run, kvm_context_t kvm, int vcpu) { int ret = 0; diff --git a/libkvm/libkvm.h b/libkvm/libkvm.h --- a/libkvm/libkvm.h +++ b/libkvm/libkvm.h @@ -639,6 +639,12 @@ #endif +#ifdef KVM_CAP_PPCPV_MAGICPAGE + +int kvm_get_magicpage_size(kvm_context_t kvm); + +#endif + int kvm_translate(kvm_context_t kvm, int vcpu, struct kvm_translation *tr); #endif diff --git a/qemu/hw/device_tree.c b/qemu/hw/device_tree.c --- a/qemu/hw/device_tree.c +++ b/qemu/hw/device_tree.c @@ -190,4 +190,14 @@ exit(1); } } + +void dt_add_subnode(void *fdt, const char *name, char *node_path) +{ + int offset; + offset = get_offset_of_node(fdt, node_path); + if (fdt_add_subnode(fdt, offset, name) < 0) { + printf("Unable to create device tree node '%s'\n", name); + exit(1); + } +} #endif diff --git a/qemu/hw/device_tree.h b/qemu/hw/device_tree.h --- a/qemu/hw/device_tree.h +++ b/qemu/hw/device_tree.h @@ -23,4 +23,5 @@ uint32_t *val_array, int size); void dt_string(void *fdt, char *node_path, char *property, char *string); +void dt_add_subnode(void *fdt, const char *name, char *node_path); #endif diff --git a/qemu/hw/ppc440_bamboo.c b/qemu/hw/ppc440_bamboo.c --- a/qemu/hw/ppc440_bamboo.c +++ b/qemu/hw/ppc440_bamboo.c @@ -51,6 +51,7 @@ uint32_t cpu_freq; uint32_t timebase_freq; uint32_t mem_reg_property[]={0, 0, ram_size}; + int pv_magicpage_size; printf("%s: START\n", __func__); @@ -167,6 +168,20 @@ dt_cell(fdt, "/chosen", "linux,initrd-end", (initrd_base + initrd_size)); dt_string(fdt, "/chosen", "bootargs", (char *)kernel_cmdline); + + if (kvm_enabled() + && kvm_qemu_check_extension(KVM_CAP_PPCPV_MAGICPAGE)) { + pv_magicpage_size = kvmppc_pv_get_magicpage_size(); + if (pv_magicpage_size < 0) { + fprintf(stderr, "%s: error reading magic page size\n", + __func__); + exit(1); + } + dt_add_subnode(fdt, "hypervisor", "/"); + dt_cell(fdt, "/hypervisor", "feature,pv-magicpage", 1); + dt_cell(fdt, "/hypervisor", "data,pv-magicpage-size", + pv_magicpage_size); + } #endif if (kvm_enabled()) { diff --git a/qemu/qemu-kvm-powerpc.c b/qemu/qemu-kvm-powerpc.c --- a/qemu/qemu-kvm-powerpc.c +++ b/qemu/qemu-kvm-powerpc.c @@ -214,6 +214,11 @@ return 0; /* XXX ignore failed DCR ops */ } +int kvmppc_pv_get_magicpage_size(void) +{ + return kvm_get_magicpage_size(kvm_context); +} + int mmukvm_get_physical_address(CPUState *env, mmu_ctx_t *ctx, target_ulong eaddr, int rw, int access_type) { diff --git a/qemu/qemu-kvm.h b/qemu/qemu-kvm.h --- a/qemu/qemu-kvm.h +++ b/qemu/qemu-kvm.h @@ -86,6 +86,7 @@ #ifdef TARGET_PPC int handle_powerpc_dcr_read(int vcpu, uint32_t dcrn, uint32_t *data); int handle_powerpc_dcr_write(int vcpu,uint32_t dcrn, uint32_t data); +int kvmppc_pv_get_magicpage_size(); #endif #if !defined(SYS_signalfd)