| Message ID | 20211206004736.1520989-1-reijiw@google.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | arm64: DC {ZVA,GVA,GZVA} shouldn't be used when DCZID_EL0.DZP == 1 | expand |
On Sun, 5 Dec 2021 16:47:34 -0800, Reiji Watanabe wrote: > DCZID_EL0.DZP indicates whether or not use of DC {ZVA,GVA,GZVA} is > prohibited. However, clear_page(), mte_set_mem_tag_range(), and > mte_zero_clear_page_tags() use those instructions without checking it. > > Fix those functions not to use DC {ZVA,GVA,GZVA} when DCZID_EL0.DZP == 1. > > v4: > - Fix mte_zero_clear_page_tags to use stz2g instead of stzg. [Catalin] > - Fix mte_zero_clear_page_tags to use MTE_GRANULE_SIZE instead > of 16. [Catalin] > > [...] Applied to arm64 (for-next/cache-ops-dzp), thanks! [1/2] arm64: clear_page() shouldn't use DC ZVA when DCZID_EL0.DZP == 1 https://git.kernel.org/arm64/c/f0616abd4e67 [2/2] arm64: mte: DC {GVA,GZVA} shouldn't be used when DCZID_EL0.DZP == 1 https://git.kernel.org/arm64/c/685e2564daa1
DCZID_EL0.DZP indicates whether or not use of DC {ZVA,GVA,GZVA} is prohibited. However, clear_page(), mte_set_mem_tag_range(), and mte_zero_clear_page_tags() use those instructions without checking it. Fix those functions not to use DC {ZVA,GVA,GZVA} when DCZID_EL0.DZP == 1. v4: - Fix mte_zero_clear_page_tags to use stz2g instead of stzg. [Catalin] - Fix mte_zero_clear_page_tags to use MTE_GRANULE_SIZE instead of 16. [Catalin] v3: https://lore.kernel.org/all/20211119060927.3185381-1-reijiw@google.com/ - Use stnp instead of stp in clear_page(). v2: https://lore.kernel.org/all/20211108071149.823570-1-reijiw@google.com/ - Fix mte_set_mem_tag_range() and mte_zero_clear_page_tags() not to use DC {GVA,GZVA} when DCZID_EL0.DZP == 1. [Mark] - Fix a typo of the comment in clear_page(). [Mark] - Fix a loop of for stp in clear_page() for more consistency with the existing loop. [Mark] v1: https://lore.kernel.org/all/20211026034844.1393437-1-reijiw@google.com/ Reiji Watanabe (2): arm64: clear_page() shouldn't use DC ZVA when DCZID_EL0.DZP == 1 arm64: mte: DC {GVA,GZVA} shouldn't be used when DCZID_EL0.DZP == 1 arch/arm64/include/asm/mte-kasan.h | 8 +++++--- arch/arm64/lib/clear_page.S | 10 ++++++++++ arch/arm64/lib/mte.S | 8 +++++++- 3 files changed, 22 insertions(+), 4 deletions(-) base-commit: 0fcfb00b28c0b7884635dacf38e46d60bf3d4eb1