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| author | Tom Lendacky <thomas.lendacky@amd.com> | 2020-09-07 15:15:26 +0200 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2020-09-07 19:45:26 +0200 |
| commit | 25189d08e5168c098c307a0eaae5b30c13a331ef (patch) | |
| tree | accef8d38c13c7af8ea514bd00014f1b47b4db26 /arch/x86/boot | |
| parent | 69add17a7c1992593a7cf775a66e0256ad4b3ef8 (diff) | |
| download | linux-25189d08e5168c098c307a0eaae5b30c13a331ef.tar.gz linux-25189d08e5168c098c307a0eaae5b30c13a331ef.tar.bz2 linux-25189d08e5168c098c307a0eaae5b30c13a331ef.zip | |
x86/sev-es: Add support for handling IOIO exceptions
Add support for decoding and handling #VC exceptions for IOIO events.
[ jroedel@suse.de: Adapted code to #VC handling framework ]
Co-developed-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20200907131613.12703-26-joro@8bytes.org
Diffstat (limited to 'arch/x86/boot')
| -rw-r--r-- | arch/x86/boot/compressed/sev-es.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/arch/x86/boot/compressed/sev-es.c b/arch/x86/boot/compressed/sev-es.c index 1e1fab583302..61504eb1ab46 100644 --- a/arch/x86/boot/compressed/sev-es.c +++ b/arch/x86/boot/compressed/sev-es.c @@ -24,6 +24,35 @@ struct ghcb boot_ghcb_page __aligned(PAGE_SIZE); struct ghcb *boot_ghcb; +/* + * Copy a version of this function here - insn-eval.c can't be used in + * pre-decompression code. + */ +static bool insn_has_rep_prefix(struct insn *insn) +{ + int i; + + insn_get_prefixes(insn); + + for (i = 0; i < insn->prefixes.nbytes; i++) { + insn_byte_t p = insn->prefixes.bytes[i]; + + if (p == 0xf2 || p == 0xf3) + return true; + } + + return false; +} + +/* + * Only a dummy for insn_get_seg_base() - Early boot-code is 64bit only and + * doesn't use segments. + */ +static unsigned long insn_get_seg_base(struct pt_regs *regs, int seg_reg_idx) +{ + return 0UL; +} + static inline u64 sev_es_rd_ghcb_msr(void) { unsigned long low, high; @@ -151,6 +180,9 @@ void do_boot_stage2_vc(struct pt_regs *regs, unsigned long exit_code) goto finish; switch (exit_code) { + case SVM_EXIT_IOIO: + result = vc_handle_ioio(boot_ghcb, &ctxt); + break; default: result = ES_UNSUPPORTED; break; |