diff options
| author | Russell King (Oracle) <rmk+kernel@armlinux.org.uk> | 2022-02-11 19:45:54 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-03-11 12:13:30 +0300 |
| commit | 2d44960d3edf9994998ff798ef618e666c4f0143 (patch) | |
| tree | f5df48738acd8d445db483b7d6a5776bfdddb84d /arch/arm/include | |
| parent | c169216a63ad1547b79e4688e6983ac54a5631fc (diff) | |
| download | linux-2d44960d3edf9994998ff798ef618e666c4f0143.tar.xz | |
ARM: report Spectre v2 status through sysfs
commit 9dd78194a3722fa6712192cdd4f7032d45112a9a upstream.
As per other architectures, add support for reporting the Spectre
vulnerability status via sysfs CPU.
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
[ preserve res variable and add SMCCC_ARCH_WORKAROUND_RET_UNAFFECTED - gregkh ]
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/arm/include')
| -rw-r--r-- | arch/arm/include/asm/spectre.h | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/arch/arm/include/asm/spectre.h b/arch/arm/include/asm/spectre.h new file mode 100644 index 000000000000..8a9019e08dba --- /dev/null +++ b/arch/arm/include/asm/spectre.h @@ -0,0 +1,28 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#ifndef __ASM_SPECTRE_H +#define __ASM_SPECTRE_H + +enum { + SPECTRE_UNAFFECTED, + SPECTRE_MITIGATED, + SPECTRE_VULNERABLE, +}; + +enum { + __SPECTRE_V2_METHOD_BPIALL, + __SPECTRE_V2_METHOD_ICIALLU, + __SPECTRE_V2_METHOD_SMC, + __SPECTRE_V2_METHOD_HVC, +}; + +enum { + SPECTRE_V2_METHOD_BPIALL = BIT(__SPECTRE_V2_METHOD_BPIALL), + SPECTRE_V2_METHOD_ICIALLU = BIT(__SPECTRE_V2_METHOD_ICIALLU), + SPECTRE_V2_METHOD_SMC = BIT(__SPECTRE_V2_METHOD_SMC), + SPECTRE_V2_METHOD_HVC = BIT(__SPECTRE_V2_METHOD_HVC), +}; + +void spectre_v2_update_state(unsigned int state, unsigned int methods); + +#endif |