ia64/xen: xencomm conversion functions for hypercalls (f021c8b3) · Commits · e / devices / android_kernel_oneplus_sm7250

arch/ia64/include/asm/xen/xcom_hcall.h

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		/*
		* Copyright (C) 2006 Tristan Gingold <tristan.gingold@bull.net>, Bull SAS
		*
		* This program is free software; you can redistribute it and/or modify
		* it under the terms of the GNU General Public License as published by
		* the Free Software Foundation; either version 2 of the License, or
		* (at your option) any later version.
		*
		* 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, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
		*/

		#ifndef _ASM_IA64_XEN_XCOM_HCALL_H
		#define _ASM_IA64_XEN_XCOM_HCALL_H

		/* These function creates inline or mini descriptor for the parameters and
		calls the corresponding xencomm_arch_hypercall_X.
		Architectures should defines HYPERVISOR_xxx as xencomm_hypercall_xxx unless
		they want to use their own wrapper. */
		extern int xencomm_hypercall_console_io(int cmd, int count, char *str);

		extern int xencomm_hypercall_event_channel_op(int cmd, void *op);

		extern int xencomm_hypercall_xen_version(int cmd, void *arg);

		extern int xencomm_hypercall_physdev_op(int cmd, void *op);

		extern int xencomm_hypercall_grant_table_op(unsigned int cmd, void *op,
		unsigned int count);

		extern int xencomm_hypercall_sched_op(int cmd, void *arg);

		extern int xencomm_hypercall_multicall(void *call_list, int nr_calls);

		extern int xencomm_hypercall_callback_op(int cmd, void *arg);

		extern int xencomm_hypercall_memory_op(unsigned int cmd, void *arg);

		extern int xencomm_hypercall_suspend(unsigned long srec);

		extern long xencomm_hypercall_vcpu_op(int cmd, int cpu, void *arg);

		extern long xencomm_hypercall_opt_feature(void *arg);

		#endif /* _ASM_IA64_XEN_XCOM_HCALL_H */

arch/ia64/include/asm/xen/xencomm.h

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		@@ -24,6 +24,7 @@

		/* Must be called before any hypercall. */
		extern void xencomm_initialize(void);
		extern int xencomm_is_initialized(void);

		/* Check if virtual contiguity means physical contiguity
		* where the passed address is a pointer value in virtual address.

arch/ia64/xen/Makefile

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		@@ -2,4 +2,4 @@
		# Makefile for Xen components
		#

		obj-y := hypercall.o xencomm.o
		obj-y := hypercall.o xencomm.o xcom_hcall.o

arch/ia64/xen/xcom_hcall.c

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		/*
		* This program is free software; you can redistribute it and/or modify
		* it under the terms of the GNU General Public License as published by
		* the Free Software Foundation; either version 2 of the License, or
		* (at your option) any later version.
		*
		* 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.
		*
		* Tristan Gingold <tristan.gingold@bull.net>
		*
		* Copyright (c) 2007
		* Isaku Yamahata <yamahata at valinux co jp>
		* VA Linux Systems Japan K.K.
		* consolidate mini and inline version.
		*/

		#include <linux/module.h>
		#include <xen/interface/xen.h>
		#include <xen/interface/memory.h>
		#include <xen/interface/grant_table.h>
		#include <xen/interface/callback.h>
		#include <xen/interface/vcpu.h>
		#include <asm/xen/hypervisor.h>
		#include <asm/xen/xencomm.h>

		/* Xencomm notes:
		* This file defines hypercalls to be used by xencomm. The hypercalls simply
		* create inlines or mini descriptors for pointers and then call the raw arch
		* hypercall xencomm_arch_hypercall_XXX
		*
		* If the arch wants to directly use these hypercalls, simply define macros
		* in asm/xen/hypercall.h, eg:
		* #define HYPERVISOR_sched_op xencomm_hypercall_sched_op
		*
		* The arch may also define HYPERVISOR_xxx as a function and do more operations
		* before/after doing the hypercall.
		*
		* Note: because only inline or mini descriptors are created these functions
		* must only be called with in kernel memory parameters.
		*/

		int
		xencomm_hypercall_console_io(int cmd, int count, char *str)
		{
		/* xen early printk uses console io hypercall before
		* xencomm initialization. In that case, we just ignore it.
		*/
		if (!xencomm_is_initialized())
		return 0;

		return xencomm_arch_hypercall_console_io
		(cmd, count, xencomm_map_no_alloc(str, count));
		}
		EXPORT_SYMBOL_GPL(xencomm_hypercall_console_io);

		int
		xencomm_hypercall_event_channel_op(int cmd, void *op)
		{
		struct xencomm_handle *desc;
		desc = xencomm_map_no_alloc(op, sizeof(struct evtchn_op));
		if (desc == NULL)
		return -EINVAL;

		return xencomm_arch_hypercall_event_channel_op(cmd, desc);
		}
		EXPORT_SYMBOL_GPL(xencomm_hypercall_event_channel_op);

		int
		xencomm_hypercall_xen_version(int cmd, void *arg)
		{
		struct xencomm_handle *desc;
		unsigned int argsize;

		switch (cmd) {
		case XENVER_version:
		/* do not actually pass an argument */
		return xencomm_arch_hypercall_xen_version(cmd, 0);
		case XENVER_extraversion:
		argsize = sizeof(struct xen_extraversion);
		break;
		case XENVER_compile_info:
		argsize = sizeof(struct xen_compile_info);
		break;
		case XENVER_capabilities:
		argsize = sizeof(struct xen_capabilities_info);
		break;
		case XENVER_changeset:
		argsize = sizeof(struct xen_changeset_info);
		break;
		case XENVER_platform_parameters:
		argsize = sizeof(struct xen_platform_parameters);
		break;
		case XENVER_get_features:
		argsize = (arg == NULL) ? 0 : sizeof(struct xen_feature_info);
		break;

		default:
		printk(KERN_DEBUG
		"%s: unknown version op %d\n", __func__, cmd);
		return -ENOSYS;
		}

		desc = xencomm_map_no_alloc(arg, argsize);
		if (desc == NULL)
		return -EINVAL;

		return xencomm_arch_hypercall_xen_version(cmd, desc);
		}
		EXPORT_SYMBOL_GPL(xencomm_hypercall_xen_version);

		int
		xencomm_hypercall_physdev_op(int cmd, void *op)
		{
		unsigned int argsize;

		switch (cmd) {
		case PHYSDEVOP_apic_read:
		case PHYSDEVOP_apic_write:
		argsize = sizeof(struct physdev_apic);
		break;
		case PHYSDEVOP_alloc_irq_vector:
		case PHYSDEVOP_free_irq_vector:
		argsize = sizeof(struct physdev_irq);
		break;
		case PHYSDEVOP_irq_status_query:
		argsize = sizeof(struct physdev_irq_status_query);
		break;

		default:
		printk(KERN_DEBUG
		"%s: unknown physdev op %d\n", __func__, cmd);
		return -ENOSYS;
		}

		return xencomm_arch_hypercall_physdev_op
		(cmd, xencomm_map_no_alloc(op, argsize));
		}

		static int
		xencommize_grant_table_op(struct xencomm_mini **xc_area,
		unsigned int cmd, void *op, unsigned int count,
		struct xencomm_handle **desc)
		{
		struct xencomm_handle *desc1;
		unsigned int argsize;

		switch (cmd) {
		case GNTTABOP_map_grant_ref:
		argsize = sizeof(struct gnttab_map_grant_ref);
		break;
		case GNTTABOP_unmap_grant_ref:
		argsize = sizeof(struct gnttab_unmap_grant_ref);
		break;
		case GNTTABOP_setup_table:
		{
		struct gnttab_setup_table *setup = op;

		argsize = sizeof(*setup);

		if (count != 1)
		return -EINVAL;
		desc1 = __xencomm_map_no_alloc
		(xen_guest_handle(setup->frame_list),
		setup->nr_frames *
		sizeof(*xen_guest_handle(setup->frame_list)),
		*xc_area);
		if (desc1 == NULL)
		return -EINVAL;
		(*xc_area)++;
		set_xen_guest_handle(setup->frame_list, (void *)desc1);
		break;
		}
		case GNTTABOP_dump_table:
		argsize = sizeof(struct gnttab_dump_table);
		break;
		case GNTTABOP_transfer:
		argsize = sizeof(struct gnttab_transfer);
		break;
		case GNTTABOP_copy:
		argsize = sizeof(struct gnttab_copy);
		break;
		case GNTTABOP_query_size:
		argsize = sizeof(struct gnttab_query_size);
		break;
		default:
		printk(KERN_DEBUG "%s: unknown hypercall grant table op %d\n",
		__func__, cmd);
		BUG();
		}

		desc = __xencomm_map_no_alloc(op, count argsize, *xc_area);
		if (*desc == NULL)
		return -EINVAL;
		(*xc_area)++;

		return 0;
		}

		int
		xencomm_hypercall_grant_table_op(unsigned int cmd, void *op,
		unsigned int count)
		{
		int rc;
		struct xencomm_handle *desc;
		XENCOMM_MINI_ALIGNED(xc_area, 2);

		rc = xencommize_grant_table_op(&xc_area, cmd, op, count, &desc);
		if (rc)
		return rc;

		return xencomm_arch_hypercall_grant_table_op(cmd, desc, count);
		}
		EXPORT_SYMBOL_GPL(xencomm_hypercall_grant_table_op);

		int
		xencomm_hypercall_sched_op(int cmd, void *arg)
		{
		struct xencomm_handle *desc;
		unsigned int argsize;

		switch (cmd) {
		case SCHEDOP_yield:
		case SCHEDOP_block:
		argsize = 0;
		break;
		case SCHEDOP_shutdown:
		argsize = sizeof(struct sched_shutdown);
		break;
		case SCHEDOP_poll:
		{
		struct sched_poll *poll = arg;
		struct xencomm_handle *ports;

		argsize = sizeof(struct sched_poll);
		ports = xencomm_map_no_alloc(xen_guest_handle(poll->ports),
		sizeof(*xen_guest_handle(poll->ports)));

		set_xen_guest_handle(poll->ports, (void *)ports);
		break;
		}
		default:
		printk(KERN_DEBUG "%s: unknown sched op %d\n", __func__, cmd);
		return -ENOSYS;
		}

		desc = xencomm_map_no_alloc(arg, argsize);
		if (desc == NULL)
		return -EINVAL;

		return xencomm_arch_hypercall_sched_op(cmd, desc);
		}
		EXPORT_SYMBOL_GPL(xencomm_hypercall_sched_op);

		int
		xencomm_hypercall_multicall(void *call_list, int nr_calls)
		{
		int rc;
		int i;
		struct multicall_entry *mce;
		struct xencomm_handle *desc;
		XENCOMM_MINI_ALIGNED(xc_area, nr_calls * 2);

		for (i = 0; i < nr_calls; i++) {
		mce = (struct multicall_entry *)call_list + i;

		switch (mce->op) {
		case __HYPERVISOR_update_va_mapping:
		case __HYPERVISOR_mmu_update:
		/* No-op on ia64. */
		break;
		case __HYPERVISOR_grant_table_op:
		rc = xencommize_grant_table_op
		(&xc_area,
		mce->args[0], (void *)mce->args[1],
		mce->args[2], &desc);
		if (rc)
		return rc;
		mce->args[1] = (unsigned long)desc;
		break;
		case __HYPERVISOR_memory_op:
		default:
		printk(KERN_DEBUG
		"%s: unhandled multicall op entry op %lu\n",
		__func__, mce->op);
		return -ENOSYS;
		}
		}

		desc = xencomm_map_no_alloc(call_list,
		nr_calls * sizeof(struct multicall_entry));
		if (desc == NULL)
		return -EINVAL;

		return xencomm_arch_hypercall_multicall(desc, nr_calls);
		}
		EXPORT_SYMBOL_GPL(xencomm_hypercall_multicall);

		int
		xencomm_hypercall_callback_op(int cmd, void *arg)
		{
		unsigned int argsize;
		switch (cmd) {
		case CALLBACKOP_register:
		argsize = sizeof(struct callback_register);
		break;
		case CALLBACKOP_unregister:
		argsize = sizeof(struct callback_unregister);
		break;
		default:
		printk(KERN_DEBUG
		"%s: unknown callback op %d\n", __func__, cmd);
		return -ENOSYS;
		}

		return xencomm_arch_hypercall_callback_op
		(cmd, xencomm_map_no_alloc(arg, argsize));
		}

		static int
		xencommize_memory_reservation(struct xencomm_mini *xc_area,
		struct xen_memory_reservation *mop)
		{
		struct xencomm_handle *desc;

		desc = __xencomm_map_no_alloc(xen_guest_handle(mop->extent_start),
		mop->nr_extents *
		sizeof(*xen_guest_handle(mop->extent_start)),
		xc_area);
		if (desc == NULL)
		return -EINVAL;

		set_xen_guest_handle(mop->extent_start, (void *)desc);
		return 0;
		}

		int
		xencomm_hypercall_memory_op(unsigned int cmd, void *arg)
		{
		GUEST_HANDLE(xen_pfn_t) extent_start_va[2] = { {NULL}, {NULL} };
		struct xen_memory_reservation *xmr = NULL;
		int rc;
		struct xencomm_handle *desc;
		unsigned int argsize;
		XENCOMM_MINI_ALIGNED(xc_area, 2);

		switch (cmd) {
		case XENMEM_increase_reservation:
		case XENMEM_decrease_reservation:
		case XENMEM_populate_physmap:
		xmr = (struct xen_memory_reservation *)arg;
		set_xen_guest_handle(extent_start_va[0],
		xen_guest_handle(xmr->extent_start));

		argsize = sizeof(*xmr);
		rc = xencommize_memory_reservation(xc_area, xmr);
		if (rc)
		return rc;
		xc_area++;
		break;

		case XENMEM_maximum_ram_page:
		argsize = 0;
		break;

		case XENMEM_add_to_physmap:
		argsize = sizeof(struct xen_add_to_physmap);
		break;

		default:
		printk(KERN_DEBUG "%s: unknown memory op %d\n", __func__, cmd);
		return -ENOSYS;
		}

		desc = xencomm_map_no_alloc(arg, argsize);
		if (desc == NULL)
		return -EINVAL;

		rc = xencomm_arch_hypercall_memory_op(cmd, desc);

		switch (cmd) {
		case XENMEM_increase_reservation:
		case XENMEM_decrease_reservation:
		case XENMEM_populate_physmap:
		set_xen_guest_handle(xmr->extent_start,
		xen_guest_handle(extent_start_va[0]));
		break;
		}

		return rc;
		}
		EXPORT_SYMBOL_GPL(xencomm_hypercall_memory_op);

		int
		xencomm_hypercall_suspend(unsigned long srec)
		{
		struct sched_shutdown arg;

		arg.reason = SHUTDOWN_suspend;

		return xencomm_arch_hypercall_sched_op(
		SCHEDOP_shutdown, xencomm_map_no_alloc(&arg, sizeof(arg)));
		}

		long
		xencomm_hypercall_vcpu_op(int cmd, int cpu, void *arg)
		{
		unsigned int argsize;
		switch (cmd) {
		case VCPUOP_register_runstate_memory_area: {
		struct vcpu_register_runstate_memory_area *area =
		(struct vcpu_register_runstate_memory_area *)arg;
		argsize = sizeof(*arg);
		set_xen_guest_handle(area->addr.h,
		(void *)xencomm_map_no_alloc(area->addr.v,
		sizeof(area->addr.v)));
		break;
		}

		default:
		printk(KERN_DEBUG "%s: unknown vcpu op %d\n", __func__, cmd);
		return -ENOSYS;
		}

		return xencomm_arch_hypercall_vcpu_op(cmd, cpu,
		xencomm_map_no_alloc(arg, argsize));
		}

		long
		xencomm_hypercall_opt_feature(void *arg)
		{
		return xencomm_arch_hypercall_opt_feature(
		xencomm_map_no_alloc(arg,
		sizeof(struct xen_ia64_opt_feature)));
		}

arch/ia64/xen/xencomm.c

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		@@ -19,11 +19,22 @@
		#include <linux/mm.h>

		static unsigned long kernel_virtual_offset;
		static int is_xencomm_initialized;

		/* for xen early printk. It uses console io hypercall which uses xencomm.
		* However early printk may use it before xencomm initialization.
		*/
		int
		xencomm_is_initialized(void)
		{
		return is_xencomm_initialized;
		}

		void
		xencomm_initialize(void)
		{
		kernel_virtual_offset = KERNEL_START - ia64_tpa(KERNEL_START);
		is_xencomm_initialized = 1;
		}

		/* Translate virtual address to physical address. */