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Subject[PATCH v5 00/75] x86: SEV-ES Guest Support
Date
From: Joerg Roedel <jroedel@suse.de>

Hi,

here is a rebased version of the latest SEV-ES patches. They are now
based on latest tip/master instead of upstream Linux and include the
necessary changes.

Changes to v4 are in particular:

- Moved early IDT setup code to idt.c, because the idt_descr
and the idt_table are now static

- This required to make stack protector work early (or disable
it for idt.c, but I didn't go that road), so MSR_GS_BASE is
now set up very early too, before calling into any C code that
has stack protector checks.

- As a result I decided to move the setup code which is needed
before the kernel switches to virtual addresses into a C
function as well. This should be much easier to maintain.

- paranoid_entry/exit now uses FSGSBASE instructions, so some
refactoring was needed to make that work early for secondary
CPUs too.

- As a result, some state of the APs is now set up on the
boot-cpu already, like the TSS and the CPU_NODE GDT entry,
so that the AP only needs to load the descriptors to handle
exceptions early.

The previous versions can be found as a linked-list starting here:

https://lore.kernel.org/lkml/20200714120917.11253-1-joro@8bytes.org/

There you also find more detailed information about SEV-ES in general
and its implications.

Please review.

Thanks,

Joerg

Borislav Petkov (1):
KVM: SVM: Use __packed shorthand

Doug Covelli (1):
x86/vmware: Add VMware specific handling for VMMCALL under SEV-ES

Joerg Roedel (53):
KVM: SVM: Add GHCB Accessor functions
x86/traps: Move pf error codes to <asm/trap_pf.h>
x86/insn: Make inat-tables.c suitable for pre-decompression code
x86/umip: Factor out instruction fetch
x86/umip: Factor out instruction decoding
x86/insn: Add insn_get_modrm_reg_off()
x86/insn: Add insn_has_rep_prefix() helper
x86/boot/compressed/64: Disable red-zone usage
x86/boot/compressed/64: Add IDT Infrastructure
x86/boot/compressed/64: Rename kaslr_64.c to ident_map_64.c
x86/boot/compressed/64: Add page-fault handler
x86/boot/compressed/64: Always switch to own page-table
x86/boot/compressed/64: Don't pre-map memory in KASLR code
x86/boot/compressed/64: Change add_identity_map() to take start and
end
x86/boot/compressed/64: Add stage1 #VC handler
x86/boot/compressed/64: Call set_sev_encryption_mask earlier
x86/boot/compressed/64: Check return value of
kernel_ident_mapping_init()
x86/boot/compressed/64: Add set_page_en/decrypted() helpers
x86/boot/compressed/64: Setup GHCB Based VC Exception handler
x86/boot/compressed/64: Unmap GHCB page before booting the kernel
x86/fpu: Move xgetbv()/xsetbv() into separate header
x86/idt: Move IDT to data segment
x86/idt: Split idt_data setup out of set_intr_gate()
x86/head/64: Install startup GDT
x86/head/64: Setup MSR_GS_BASE before calling into C code
x86/head/64: Load GDT after switch to virtual addresses
x86/head/64: Load segment registers earlier
x86/head/64: Switch to initial stack earlier
x86/head/64: Make fixup_pointer() static inline
x86/head/64: Load IDT earlier
x86/head/64: Move early exception dispatch to C code
x86/head/64: Set CR4.FSGSBASE early
x86/sev-es: Add SEV-ES Feature Detection
x86/sev-es: Print SEV-ES info into kernel log
x86/sev-es: Compile early handler code into kernel image
x86/sev-es: Setup early #VC handler
x86/sev-es: Setup GHCB based boot #VC handler
x86/sev-es: Allocate and Map IST stack for #VC handler
x86/sev-es: Adjust #VC IST Stack on entering NMI handler
x86/dumpstack/64: Add noinstr version of get_stack_info()
x86/entry/64: Add entry code for #VC handler
x86/sev-es: Wire up existing #VC exit-code handlers
x86/sev-es: Handle instruction fetches from user-space
x86/sev-es: Handle MMIO String Instructions
x86/sev-es: Handle #AC Events
x86/sev-es: Handle #DB Events
x86/paravirt: Allow hypervisor specific VMMCALL handling under SEV-ES
x86/realmode: Add SEV-ES specific trampoline entry point
x86/smpboot: Setup TSS for starting AP
x86/head/64: Don't call verify_cpu() on starting APs
x86/head/64: Rename start_cpu0
x86/sev-es: Support CPU offline/online
x86/sev-es: Handle NMI State

Martin Radev (1):
x86/sev-es: Check required CPU features for SEV-ES

Tom Lendacky (19):
KVM: SVM: Add GHCB definitions
x86/cpufeatures: Add SEV-ES CPU feature
x86/sev-es: Add support for handling IOIO exceptions
x86/sev-es: Add CPUID handling to #VC handler
x86/sev-es: Setup per-cpu GHCBs for the runtime handler
x86/sev-es: Add Runtime #VC Exception Handler
x86/sev-es: Handle MMIO events
x86/sev-es: Handle MSR events
x86/sev-es: Handle DR7 read/write events
x86/sev-es: Handle WBINVD Events
x86/sev-es: Handle RDTSC(P) Events
x86/sev-es: Handle RDPMC Events
x86/sev-es: Handle INVD Events
x86/sev-es: Handle MONITOR/MONITORX Events
x86/sev-es: Handle MWAIT/MWAITX Events
x86/sev-es: Handle VMMCALL Events
x86/kvm: Add KVM specific VMMCALL handling under SEV-ES
x86/realmode: Setup AP jump table
x86/efi: Add GHCB mappings when SEV-ES is active

arch/x86/Kconfig | 1 +
arch/x86/boot/Makefile | 2 +-
arch/x86/boot/compressed/Makefile | 9 +-
arch/x86/boot/compressed/cpuflags.c | 4 -
arch/x86/boot/compressed/head_64.S | 32 +-
arch/x86/boot/compressed/ident_map_64.c | 349 +++++
arch/x86/boot/compressed/idt_64.c | 54 +
arch/x86/boot/compressed/idt_handlers_64.S | 77 ++
arch/x86/boot/compressed/kaslr.c | 36 +-
arch/x86/boot/compressed/kaslr_64.c | 153 ---
arch/x86/boot/compressed/misc.c | 7 +
arch/x86/boot/compressed/misc.h | 50 +-
arch/x86/boot/compressed/sev-es.c | 214 +++
arch/x86/entry/entry_64.S | 78 ++
arch/x86/include/asm/cpu.h | 2 +-
arch/x86/include/asm/cpu_entry_area.h | 33 +-
arch/x86/include/asm/cpufeatures.h | 1 +
arch/x86/include/asm/desc_defs.h | 3 +
arch/x86/include/asm/fpu/internal.h | 33 +-
arch/x86/include/asm/fpu/xcr.h | 37 +
arch/x86/include/asm/idtentry.h | 49 +
arch/x86/include/asm/insn-eval.h | 6 +
arch/x86/include/asm/mem_encrypt.h | 5 +
arch/x86/include/asm/msr-index.h | 3 +
arch/x86/include/asm/page_64_types.h | 1 +
arch/x86/include/asm/pgtable.h | 2 +-
arch/x86/include/asm/processor.h | 7 +
arch/x86/include/asm/proto.h | 1 +
arch/x86/include/asm/realmode.h | 4 +
arch/x86/include/asm/segment.h | 2 +-
arch/x86/include/asm/setup.h | 16 +-
arch/x86/include/asm/sev-es.h | 113 ++
arch/x86/include/asm/stacktrace.h | 2 +
arch/x86/include/asm/svm.h | 118 +-
arch/x86/include/asm/trap_pf.h | 24 +
arch/x86/include/asm/trapnr.h | 1 +
arch/x86/include/asm/traps.h | 20 +-
arch/x86/include/asm/x86_init.h | 16 +-
arch/x86/include/uapi/asm/svm.h | 11 +
arch/x86/kernel/Makefile | 1 +
arch/x86/kernel/cpu/amd.c | 3 +-
arch/x86/kernel/cpu/common.c | 37 +-
arch/x86/kernel/cpu/scattered.c | 1 +
arch/x86/kernel/cpu/vmware.c | 50 +-
arch/x86/kernel/dumpstack.c | 7 +-
arch/x86/kernel/dumpstack_64.c | 47 +-
arch/x86/kernel/head64.c | 85 +-
arch/x86/kernel/head_32.S | 4 +-
arch/x86/kernel/head_64.S | 159 ++-
arch/x86/kernel/idt.c | 94 +-
arch/x86/kernel/kvm.c | 35 +-
arch/x86/kernel/nmi.c | 12 +
arch/x86/kernel/sev-es-shared.c | 507 +++++++
arch/x86/kernel/sev-es.c | 1404 ++++++++++++++++++++
arch/x86/kernel/smpboot.c | 10 +-
arch/x86/kernel/traps.c | 56 +
arch/x86/kernel/umip.c | 49 +-
arch/x86/kvm/svm/svm.c | 2 +
arch/x86/lib/insn-eval.c | 130 ++
arch/x86/mm/cpu_entry_area.c | 3 +-
arch/x86/mm/extable.c | 1 +
arch/x86/mm/mem_encrypt.c | 38 +-
arch/x86/mm/mem_encrypt_identity.c | 3 +
arch/x86/platform/efi/efi_64.c | 10 +
arch/x86/realmode/init.c | 24 +-
arch/x86/realmode/rm/header.S | 3 +
arch/x86/realmode/rm/trampoline_64.S | 20 +
arch/x86/tools/gen-insn-attr-x86.awk | 50 +-
tools/arch/x86/tools/gen-insn-attr-x86.awk | 50 +-
69 files changed, 4025 insertions(+), 446 deletions(-)
create mode 100644 arch/x86/boot/compressed/ident_map_64.c
create mode 100644 arch/x86/boot/compressed/idt_64.c
create mode 100644 arch/x86/boot/compressed/idt_handlers_64.S
delete mode 100644 arch/x86/boot/compressed/kaslr_64.c
create mode 100644 arch/x86/boot/compressed/sev-es.c
create mode 100644 arch/x86/include/asm/fpu/xcr.h
create mode 100644 arch/x86/include/asm/sev-es.h
create mode 100644 arch/x86/include/asm/trap_pf.h
create mode 100644 arch/x86/kernel/sev-es-shared.c
create mode 100644 arch/x86/kernel/sev-es.c

--
2.27.0

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