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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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5abb9351df
The Ultravisor Call Facility (stfle bit 158) defines an API to the Ultravisor (UV calls), a mini hypervisor located at machine level. With help of the Ultravisor, KVM will be able to run "protected" VMs, special VMs whose memory and management data are unavailable to KVM. The protected VMs can also request services from the Ultravisor. The guest api consists of UV calls to share and unshare memory with the kvm hypervisor. To enable this feature support PROTECTED_VIRTUALIZATION_GUEST kconfig option has been introduced. Co-developed-by: Janosch Frank <frankja@de.ibm.com> Signed-off-by: Janosch Frank <frankja@de.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
72 lines
1.8 KiB
C
72 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/string.h>
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#include <asm/setup.h>
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#include <asm/sclp.h>
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#include <asm/uv.h>
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#include "compressed/decompressor.h"
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#include "boot.h"
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extern char __boot_data_start[], __boot_data_end[];
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extern char __boot_data_preserved_start[], __boot_data_preserved_end[];
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void error(char *x)
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{
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sclp_early_printk("\n\n");
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sclp_early_printk(x);
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sclp_early_printk("\n\n -- System halted");
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disabled_wait(0xdeadbeef);
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}
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#ifdef CONFIG_KERNEL_UNCOMPRESSED
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unsigned long mem_safe_offset(void)
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{
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return vmlinux.default_lma + vmlinux.image_size + vmlinux.bss_size;
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}
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#endif
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static void rescue_initrd(void)
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{
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unsigned long min_initrd_addr;
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if (!IS_ENABLED(CONFIG_BLK_DEV_INITRD))
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return;
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if (!INITRD_START || !INITRD_SIZE)
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return;
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min_initrd_addr = mem_safe_offset();
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if (min_initrd_addr <= INITRD_START)
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return;
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memmove((void *)min_initrd_addr, (void *)INITRD_START, INITRD_SIZE);
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INITRD_START = min_initrd_addr;
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}
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static void copy_bootdata(void)
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{
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if (__boot_data_end - __boot_data_start != vmlinux.bootdata_size)
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error(".boot.data section size mismatch");
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memcpy((void *)vmlinux.bootdata_off, __boot_data_start, vmlinux.bootdata_size);
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if (__boot_data_preserved_end - __boot_data_preserved_start != vmlinux.bootdata_preserved_size)
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error(".boot.preserved.data section size mismatch");
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memcpy((void *)vmlinux.bootdata_preserved_off, __boot_data_preserved_start, vmlinux.bootdata_preserved_size);
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}
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void startup_kernel(void)
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{
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void *img;
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uv_query_info();
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rescue_initrd();
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sclp_early_read_info();
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store_ipl_parmblock();
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setup_boot_command_line();
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parse_boot_command_line();
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setup_memory_end();
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detect_memory();
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if (!IS_ENABLED(CONFIG_KERNEL_UNCOMPRESSED)) {
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img = decompress_kernel();
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memmove((void *)vmlinux.default_lma, img, vmlinux.image_size);
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}
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copy_bootdata();
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vmlinux.entry();
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}
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