234 lines
6.3 KiB
C
234 lines
6.3 KiB
C
/*
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* Copyright (C) 2018 Intel Corporation. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <hypervisor.h>
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#include <zeropage.h>
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#include <boot_context.h>
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#ifdef CONFIG_PARTITION_MODE
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static uint32_t create_e820_table(struct e820_entry *param_e820)
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{
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uint32_t i;
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for (i = 0U; i < NUM_E820_ENTRIES; i++) {
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param_e820[i].baseaddr = e820_default_entries[i].baseaddr;
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param_e820[i].length = e820_default_entries[i].length;
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param_e820[i].type = e820_default_entries[i].type;
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}
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return NUM_E820_ENTRIES;
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}
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#else
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static uint32_t create_e820_table(struct e820_entry *param_e820)
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{
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uint32_t i;
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ASSERT(e820_entries > 0U,
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"e820 should be inited");
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for (i = 0U; i < e820_entries; i++) {
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param_e820[i].baseaddr = e820[i].baseaddr;
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param_e820[i].length = e820[i].length;
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param_e820[i].type = e820[i].type;
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}
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return e820_entries;
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}
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#endif
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static void prepare_bsp_gdt(struct acrn_vm *vm)
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{
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size_t gdt_len;
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uint64_t gdt_base_hpa;
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void *gdt_base_hva;
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gdt_base_hpa = gpa2hpa(vm, boot_context.gdt.base);
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if (boot_context.gdt.base == gdt_base_hpa) {
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return;
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} else {
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gdt_base_hva = hpa2hva(gdt_base_hpa);
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gdt_len = ((size_t)boot_context.gdt.limit + 1U) / sizeof(uint8_t);
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(void )memcpy_s(gdt_base_hva, gdt_len, hpa2hva(boot_context.gdt.base), gdt_len);
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}
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return;
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}
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static uint64_t create_zero_page(struct acrn_vm *vm)
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{
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struct zero_page *zeropage;
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struct sw_linux *sw_linux = &(vm->sw.linux_info);
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struct sw_kernel_info *sw_kernel = &(vm->sw.kernel_info);
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struct zero_page *hva;
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uint64_t gpa, addr;
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/* Set zeropage in Linux Guest RAM region just past boot args */
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gpa = (uint64_t)sw_linux->bootargs_load_addr + MEM_4K;
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hva = (struct zero_page *)gpa2hva(vm, gpa);
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zeropage = hva;
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/* clear the zeropage */
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(void)memset(zeropage, 0U, MEM_2K);
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/* copy part of the header into the zero page */
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hva = (struct zero_page *)gpa2hva(vm, (uint64_t)sw_kernel->kernel_load_addr);
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(void)memcpy_s(&(zeropage->hdr), sizeof(zeropage->hdr),
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&(hva->hdr), sizeof(hva->hdr));
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/* See if kernel has a RAM disk */
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if (sw_linux->ramdisk_src_addr != NULL) {
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/* Copy ramdisk load_addr and size in zeropage header structure
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*/
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addr = (uint64_t)sw_linux->ramdisk_load_addr;
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zeropage->hdr.ramdisk_addr = (uint32_t)addr;
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zeropage->hdr.ramdisk_size = (uint32_t)sw_linux->ramdisk_size;
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}
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/* Copy bootargs load_addr in zeropage header structure */
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addr = (uint64_t)sw_linux->bootargs_load_addr;
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zeropage->hdr.bootargs_addr = (uint32_t)addr;
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/* set constant arguments in zero page */
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zeropage->hdr.loader_type = 0xffU;
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zeropage->hdr.load_flags |= (1U << 5U); /* quiet */
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/* Create/add e820 table entries in zeropage */
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zeropage->e820_nentries = (uint8_t)create_e820_table(zeropage->e820);
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/* Return Physical Base Address of zeropage */
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return gpa;
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}
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int general_sw_loader(struct acrn_vm *vm)
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{
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int32_t ret = 0;
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void *hva;
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char dyn_bootargs[100] = {0};
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uint32_t kernel_entry_offset;
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struct zero_page *zeropage;
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struct sw_linux *sw_linux = &(vm->sw.linux_info);
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struct sw_kernel_info *sw_kernel = &(vm->sw.kernel_info);
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struct acrn_vcpu *vcpu = get_primary_vcpu(vm);
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pr_dbg("Loading guest to run-time location");
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prepare_bsp_gdt(vm);
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set_vcpu_regs(vcpu, &boot_context);
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/* calculate the kernel entry point */
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zeropage = (struct zero_page *)sw_kernel->kernel_src_addr;
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kernel_entry_offset = (uint32_t)(zeropage->hdr.setup_sects + 1U) * 512U;
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if (vcpu->arch.cpu_mode == CPU_MODE_64BIT) {
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/* 64bit entry is the 512bytes after the start */
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kernel_entry_offset += 512U;
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}
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sw_kernel->kernel_entry_addr =
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(void *)((uint64_t)sw_kernel->kernel_load_addr
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+ kernel_entry_offset);
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if (is_vcpu_bsp(vcpu)) {
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/* Set VCPU entry point to kernel entry */
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vcpu_set_rip(vcpu, (uint64_t)sw_kernel->kernel_entry_addr);
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pr_info("%s, VM %hu VCPU %hu Entry: 0x%016llx ",
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__func__, vm->vm_id, vcpu->vcpu_id,
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sw_kernel->kernel_entry_addr);
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}
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/* Calculate the host-physical address where the guest will be loaded */
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hva = gpa2hva(vm, (uint64_t)sw_kernel->kernel_load_addr);
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/* Copy the guest kernel image to its run-time location */
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(void)memcpy_s((void *)hva, sw_kernel->kernel_size,
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sw_kernel->kernel_src_addr,
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sw_kernel->kernel_size);
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/* See if guest is a Linux guest */
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if (vm->sw.kernel_type == VM_LINUX_GUEST) {
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uint32_t i;
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/* Documentation states: ebx=0, edi=0, ebp=0, esi=ptr to
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* zeropage
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*/
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for (i = 0U; i < NUM_GPRS; i++) {
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vcpu_set_gpreg(vcpu, i, 0UL);
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}
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/* Get host-physical address for guest bootargs */
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hva = gpa2hva(vm,
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(uint64_t)sw_linux->bootargs_load_addr);
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/* Copy Guest OS bootargs to its load location */
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(void)strcpy_s((char *)hva, MEM_2K,
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sw_linux->bootargs_src_addr);
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#ifdef CONFIG_CMA
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/* add "cma=XXXXM@0xXXXXXXXX" to cmdline*/
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if (is_vm0(vm) && (e820_mem.max_ram_blk_size > 0)) {
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snprintf(dyn_bootargs, 100U, " cma=%dM@0x%llx",
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(e820_mem.max_ram_blk_size >> 20U),
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e820_mem.max_ram_blk_base);
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(void)strcpy_s((char *)hva
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+ sw_linux->bootargs_size,
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100U, dyn_bootargs);
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}
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#else
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/* add "hugepagesz=1G hugepages=x" to cmdline for 1G hugepage
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* reserving. Current strategy is "total_mem_size in Giga -
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* remained 1G pages" for reserving.
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*/
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if (is_vm0(vm)) {
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int32_t reserving_1g_pages;
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#ifdef CONFIG_REMAIN_1G_PAGES
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reserving_1g_pages = (e820_mem.total_mem_size >> 30U) -
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CONFIG_REMAIN_1G_PAGES;
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#else
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reserving_1g_pages = (e820_mem.total_mem_size >> 30U) -
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3;
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#endif
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if (reserving_1g_pages > 0) {
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snprintf(dyn_bootargs, 100U,
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" hugepagesz=1G hugepages=%d",
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reserving_1g_pages);
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(void)strcpy_s((char *)hva
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+ sw_linux->bootargs_size,
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100U, dyn_bootargs);
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}
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}
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#endif
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/* Check if a RAM disk is present with Linux guest */
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if (sw_linux->ramdisk_src_addr != NULL) {
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/* Get host-physical address for guest RAM disk */
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hva = gpa2hva(vm,
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(uint64_t)sw_linux->ramdisk_load_addr);
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/* Copy RAM disk to its load location */
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(void)memcpy_s((void *)hva,
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sw_linux->ramdisk_size,
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sw_linux->ramdisk_src_addr,
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sw_linux->ramdisk_size);
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}
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/* Create Zeropage and copy Physical Base Address of Zeropage
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* in RSI
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*/
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vcpu_set_gpreg(vcpu, CPU_REG_RSI, create_zero_page(vm));
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pr_info("%s, RSI pointing to zero page for VM %d at GPA %X",
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__func__, vm->vm_id,
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vcpu_get_gpreg(vcpu, CPU_REG_RSI));
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} else {
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pr_err("%s, Loading VM SW failed", __func__);
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ret = -EINVAL;
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}
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return ret;
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}
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