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| author | Marc Zyngier <marc.zyngier@arm.com> | 2017-06-06 19:08:33 +0100 |
|---|---|---|
| committer | Christoffer Dall <cdall@linaro.org> | 2017-06-06 22:20:02 +0200 |
| commit | d68c1f7fd1b7148dab5fe658321d511998969f2d (patch) | |
| tree | dad8985ff69023999b33a51382598d5627daa292 /arch/arm64/include | |
| parent | d6dbdd3c8558cad3b6d74cc357b408622d122331 (diff) | |
| download | linux-d68c1f7fd1b7148dab5fe658321d511998969f2d.tar.gz linux-d68c1f7fd1b7148dab5fe658321d511998969f2d.tar.xz | |
arm64: KVM: Preserve RES1 bits in SCTLR_EL2
__do_hyp_init has the rather bad habit of ignoring RES1 bits and
writing them back as zero. On a v8.0-8.2 CPU, this doesn't do anything
bad, but may end-up being pretty nasty on future revisions of the
architecture.
Let's preserve those bits so that we don't have to fix this later on.
Cc: stable@vger.kernel.org
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <cdall@linaro.org>
Diffstat (limited to 'arch/arm64/include')
| -rw-r--r-- | arch/arm64/include/asm/sysreg.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h index 15c142ce991c..b4d13d9267ff 100644 --- a/arch/arm64/include/asm/sysreg.h +++ b/arch/arm64/include/asm/sysreg.h @@ -286,6 +286,10 @@ #define SCTLR_ELx_A (1 << 1) #define SCTLR_ELx_M 1 +#define SCTLR_EL2_RES1 ((1 << 4) | (1 << 5) | (1 << 11) | (1 << 16) | \ + (1 << 16) | (1 << 18) | (1 << 22) | (1 << 23) | \ + (1 << 28) | (1 << 29)) + #define SCTLR_ELx_FLAGS (SCTLR_ELx_M | SCTLR_ELx_A | SCTLR_ELx_C | \ SCTLR_ELx_SA | SCTLR_ELx_I) |