mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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22945688ac
Add support for reset of secure guest via a new ioctl KVM_PPC_SVM_OFF. This ioctl will be issued by QEMU during reset and includes the the following steps: - Release all device pages of the secure guest. - Ask UV to terminate the guest via UV_SVM_TERMINATE ucall - Unpin the VPA pages so that they can be migrated back to secure side when guest becomes secure again. This is required because pinned pages can't be migrated. - Reinit the partition scoped page tables After these steps, guest is ready to issue UV_ESM call once again to switch to secure mode. Signed-off-by: Bharata B Rao <bharata@linux.ibm.com> Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> [Implementation of uv_svm_terminate() and its call from guest shutdown path] Signed-off-by: Ram Pai <linuxram@us.ibm.com> [Unpinning of VPA pages] Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
85 lines
2.1 KiB
C
85 lines
2.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Ultravisor definitions
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*
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* Copyright 2019, IBM Corporation.
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*
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*/
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#ifndef _ASM_POWERPC_ULTRAVISOR_H
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#define _ASM_POWERPC_ULTRAVISOR_H
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#include <asm/asm-prototypes.h>
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#include <asm/ultravisor-api.h>
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#include <asm/firmware.h>
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int early_init_dt_scan_ultravisor(unsigned long node, const char *uname,
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int depth, void *data);
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/*
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* In ultravisor enabled systems, PTCR becomes ultravisor privileged only for
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* writing and an attempt to write to it will cause a Hypervisor Emulation
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* Assistance interrupt.
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*/
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static inline void set_ptcr_when_no_uv(u64 val)
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{
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if (!firmware_has_feature(FW_FEATURE_ULTRAVISOR))
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mtspr(SPRN_PTCR, val);
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}
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static inline int uv_register_pate(u64 lpid, u64 dw0, u64 dw1)
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{
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return ucall_norets(UV_WRITE_PATE, lpid, dw0, dw1);
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}
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static inline int uv_share_page(u64 pfn, u64 npages)
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{
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return ucall_norets(UV_SHARE_PAGE, pfn, npages);
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}
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static inline int uv_unshare_page(u64 pfn, u64 npages)
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{
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return ucall_norets(UV_UNSHARE_PAGE, pfn, npages);
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}
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static inline int uv_unshare_all_pages(void)
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{
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return ucall_norets(UV_UNSHARE_ALL_PAGES);
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}
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static inline int uv_page_in(u64 lpid, u64 src_ra, u64 dst_gpa, u64 flags,
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u64 page_shift)
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{
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return ucall_norets(UV_PAGE_IN, lpid, src_ra, dst_gpa, flags,
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page_shift);
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}
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static inline int uv_page_out(u64 lpid, u64 dst_ra, u64 src_gpa, u64 flags,
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u64 page_shift)
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{
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return ucall_norets(UV_PAGE_OUT, lpid, dst_ra, src_gpa, flags,
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page_shift);
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}
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static inline int uv_register_mem_slot(u64 lpid, u64 start_gpa, u64 size,
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u64 flags, u64 slotid)
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{
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return ucall_norets(UV_REGISTER_MEM_SLOT, lpid, start_gpa,
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size, flags, slotid);
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}
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static inline int uv_unregister_mem_slot(u64 lpid, u64 slotid)
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{
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return ucall_norets(UV_UNREGISTER_MEM_SLOT, lpid, slotid);
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}
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static inline int uv_page_inval(u64 lpid, u64 gpa, u64 page_shift)
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{
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return ucall_norets(UV_PAGE_INVAL, lpid, gpa, page_shift);
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}
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static inline int uv_svm_terminate(u64 lpid)
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{
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return ucall_norets(UV_SVM_TERMINATE, lpid);
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}
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#endif /* _ASM_POWERPC_ULTRAVISOR_H */
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