diff options
| author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2022-06-14 15:01:33 +0300 |
|---|---|---|
| committer | Dave Hansen <dave.hansen@linux.intel.com> | 2022-06-15 10:52:59 -0700 |
| commit | 60428d8bc27f52e8f1540f98e1b6ef0156d43f0d (patch) | |
| tree | 03dc3962dc51821807a8a911366c884804ebb5af /arch | |
| parent | e32683c6f7d22ba624e0bfc58b02cf3348bdca63 (diff) | |
| download | linux-60428d8bc27f52e8f1540f98e1b6ef0156d43f0d.tar.bz2 | |
x86/tdx: Fix early #VE handling
tdx_early_handle_ve() does not increment RIP after successfully
handling the exception. That leads to infinite loop of exceptions.
Move RIP when exceptions are successfully handled.
[ dhansen: make problem statement more clear ]
Fixes: 32e72854fa5f ("x86/tdx: Port I/O: Add early boot support")
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Link: https://lkml.kernel.org/r/20220614120135.14812-2-kirill.shutemov@linux.intel.com
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/coco/tdx/tdx.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/x86/coco/tdx/tdx.c b/arch/x86/coco/tdx/tdx.c index 03deb4d6920d..faae53f8d559 100644 --- a/arch/x86/coco/tdx/tdx.c +++ b/arch/x86/coco/tdx/tdx.c @@ -447,13 +447,17 @@ static bool handle_io(struct pt_regs *regs, u32 exit_qual) __init bool tdx_early_handle_ve(struct pt_regs *regs) { struct ve_info ve; + bool ret; tdx_get_ve_info(&ve); if (ve.exit_reason != EXIT_REASON_IO_INSTRUCTION) return false; - return handle_io(regs, ve.exit_qual); + ret = handle_io(regs, ve.exit_qual); + if (ret) + regs->ip += ve.instr_len; + return ret; } void tdx_get_ve_info(struct ve_info *ve) |