Messages in this thread Patch in this message | | | From | "Kirill A. Shutemov" <> | Subject | [PATCHv3 1/3] x86/tdx: Fix early #VE handling | Date | Wed, 25 May 2022 01:10:10 +0300 |
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Move RIP in tdx_early_handle_ve() after handling the exception. Failure to do that leads to infinite loop of exceptions.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Fixes: 32e72854fa5f ("x86/tdx: Port I/O: Add early boot support") Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com> --- arch/x86/coco/tdx/tdx.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
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) -- 2.35.1
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