Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 5.10 23/23] arm64: kvm: Fix copy-and-paste error in bhb templates for v5.10 stable | Date | Thu, 17 Mar 2022 13:46:04 +0100 |
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From: James Morse <james.morse@arm.com>
KVM's infrastructure for spectre mitigations in the vectors in v5.10 and earlier is different, it uses templates which are used to build a set of vectors at runtime.
There are two copy-and-paste errors in the templates: __spectre_bhb_loop_k24 should loop 24 times and __spectre_bhb_loop_k32 32.
Fix these.
Reported-by: Pavel Machek <pavel@denx.de> Link: https://lore.kernel.org/all/20220310234858.GB16308@amd/ Signed-off-by: James Morse <james.morse@arm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- arch/arm64/kvm/hyp/smccc_wa.S | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/arch/arm64/kvm/hyp/smccc_wa.S +++ b/arch/arm64/kvm/hyp/smccc_wa.S @@ -68,7 +68,7 @@ SYM_DATA_START(__spectre_bhb_loop_k24) esb sub sp, sp, #(8 * 2) stp x0, x1, [sp, #(8 * 0)] - mov x0, #8 + mov x0, #24 2: b . + 4 subs x0, x0, #1 b.ne 2b @@ -85,7 +85,7 @@ SYM_DATA_START(__spectre_bhb_loop_k32) esb sub sp, sp, #(8 * 2) stp x0, x1, [sp, #(8 * 0)] - mov x0, #8 + mov x0, #32 2: b . + 4 subs x0, x0, #1 b.ne 2b
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