diff options
| author | Peter Gonda <pgonda@google.com> | 2021-01-05 19:33:11 +0300 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2021-01-05 20:55:00 +0300 |
| commit | a8f7e08a81708920a928664a865208fdf451c49f (patch) | |
| tree | 27736d459831e12c6fb5f39a59884b87c29cb247 /arch | |
| parent | d1c5246e08eb64991001d97a3bd119c93edbc79a (diff) | |
| download | linux-a8f7e08a81708920a928664a865208fdf451c49f.tar.xz | |
x86/sev-es: Fix SEV-ES OUT/IN immediate opcode vc handling
The IN and OUT instructions with port address as an immediate operand
only use an 8-bit immediate (imm8). The current VC handler uses the
entire 32-bit immediate value but these instructions only set the first
bytes.
Cast the operand to an u8 for that.
[ bp: Massage commit message. ]
Fixes: 25189d08e5168 ("x86/sev-es: Add support for handling IOIO exceptions")
Signed-off-by: Peter Gonda <pgonda@google.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: David Rientjes <rientjes@google.com>
Link: https://lkml.kernel.org/r/20210105163311.221490-1-pgonda@google.com
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kernel/sev-es-shared.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/kernel/sev-es-shared.c b/arch/x86/kernel/sev-es-shared.c index 7d04b356d44d..cdc04d091242 100644 --- a/arch/x86/kernel/sev-es-shared.c +++ b/arch/x86/kernel/sev-es-shared.c @@ -305,14 +305,14 @@ static enum es_result vc_ioio_exitinfo(struct es_em_ctxt *ctxt, u64 *exitinfo) case 0xe4: case 0xe5: *exitinfo |= IOIO_TYPE_IN; - *exitinfo |= (u64)insn->immediate.value << 16; + *exitinfo |= (u8)insn->immediate.value << 16; break; /* OUT immediate opcodes */ case 0xe6: case 0xe7: *exitinfo |= IOIO_TYPE_OUT; - *exitinfo |= (u64)insn->immediate.value << 16; + *exitinfo |= (u8)insn->immediate.value << 16; break; /* IN register opcodes */ |