Re: [PATCH v9 11/17] target/riscv: mmu changes for zicfiss shadow stack

qemu-devel

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [PATCH v9 11/17] target/riscv: mmu changes for zicfiss shadow stack

From:	Deepak Gupta
Subject:	Re: [PATCH v9 11/17] target/riscv: mmu changes for zicfiss shadow stack protection
Date:	Tue, 27 Aug 2024 16:06:18 -0700

On Tue, Aug 27, 2024 at 03:59:08PM +1000, Alistair Francis wrote:

On Tue, Aug 27, 2024 at 1:31 AM Deepak Gupta <debug@rivosinc.com> wrote:


zicfiss protects shadow stack using new page table encodings PTE.W=0,
PTE.R=0 and PTE.X=0. This encoding is reserved if zicfiss is not


Shouldn't this be R=0, W=1, and X=0 ?


Yes. A typo. Will fix.


Alistair

implemented or if shadow stack are not enabled.
Loads on shadow stack memory are allowed while stores to shadow stack

[Prev in Thread]

Current Thread

[Next in Thread]

[PATCH v9 10/17] target/riscv: tb flag for shadow stack instructions, (continued)
- [PATCH v9 10/17] target/riscv: tb flag for shadow stack instructions, Deepak Gupta, 2024/08/26
  - Re: [PATCH v9 10/17] target/riscv: tb flag for shadow stack instructions, Alistair Francis, 2024/08/27
- [PATCH v9 16/17] disas/riscv: enable disassembly for zicfiss instructions, Deepak Gupta, 2024/08/26
- [PATCH v9 13/17] target/riscv: update `decode_save_opc` to store extra word2, Deepak Gupta, 2024/08/26
  - Re: [PATCH v9 13/17] target/riscv: update `decode_save_opc` to store extra word2, Richard Henderson, 2024/08/26
- [PATCH v9 14/17] target/riscv: implement zicfiss instructions, Deepak Gupta, 2024/08/26
- [PATCH v9 08/17] target/riscv: Add zicfiss extension, Deepak Gupta, 2024/08/26
  - Re: [PATCH v9 08/17] target/riscv: Add zicfiss extension, Alistair Francis, 2024/08/27
- [PATCH v9 11/17] target/riscv: mmu changes for zicfiss shadow stack protection, Deepak Gupta, 2024/08/26
  - Re: [PATCH v9 11/17] target/riscv: mmu changes for zicfiss shadow stack protection, Alistair Francis, 2024/08/27
    - Re: [PATCH v9 11/17] target/riscv: mmu changes for zicfiss shadow stack protection, Deepak Gupta <=
- [PATCH v9 15/17] target/riscv: compressed encodings for sspush and sspopchk, Deepak Gupta, 2024/08/26
  - Re: [PATCH v9 15/17] target/riscv: compressed encodings for sspush and sspopchk, Richard Henderson, 2024/08/26
- [PATCH v9 17/17] disas/riscv: enable disassembly for compressed sspush/sspopchk, Deepak Gupta, 2024/08/26
- Re: [PATCH v9 00/17] riscv support for control flow integrity extensions, Alistair Francis, 2024/08/26

Prev by Date: [PATCH v3 2/2] plugins: add option to dump write argument to syscall plugin
Next by Date: [PATCH v10 00/21] riscv support for control flow integrity extensions
Previous by thread: Re: [PATCH v9 11/17] target/riscv: mmu changes for zicfiss shadow stack protection
Next by thread: [PATCH v9 15/17] target/riscv: compressed encodings for sspush and sspopchk
Index(es):
- Date
- Thread