| Message ID | 20190926183808.11630-6-julien.grall@arm.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | xen/arm: XSA-201 and XSA-263 fixes | expand |
Julien Grall writes: > The macro alternative_if_not_cap is taking two parameters. The second > parameter is never used and it is hard to see how this can be used > correctly as it is only protecting the alternative section magic. > > Signed-off-by: Julien Grall <julien.grall@arm.com> Reviewed-by: Volodymyr Babchuk <volodymyr.babchuk@epam.com> > --- > xen/include/asm-arm/alternative.h | 4 +--- > 1 file changed, 1 insertion(+), 3 deletions(-) > > diff --git a/xen/include/asm-arm/alternative.h b/xen/include/asm-arm/alternative.h > index dedb6dd001..2830a6da2d 100644 > --- a/xen/include/asm-arm/alternative.h > +++ b/xen/include/asm-arm/alternative.h > @@ -116,13 +116,11 @@ int apply_alternatives(const struct alt_instr *start, const struct alt_instr *en > * The code that follows this macro will be assembled and linked as > * normal. There are no restrictions on this code. > */ > -.macro alternative_if_not cap, enable = 1 > - .if \enable > +.macro alternative_if_not cap > .pushsection .altinstructions, "a" > altinstruction_entry 661f, 663f, \cap, 662f-661f, 664f-663f > .popsection > 661: > - .endif > .endm > > /*
On Fri, 27 Sep 2019, Volodymyr Babchuk wrote: > > Julien Grall writes: > > > The macro alternative_if_not_cap is taking two parameters. The second > > parameter is never used and it is hard to see how this can be used > > correctly as it is only protecting the alternative section magic. > > > > Signed-off-by: Julien Grall <julien.grall@arm.com> > Reviewed-by: Volodymyr Babchuk <volodymyr.babchuk@epam.com> Acked-by: Stefano Stabellini <sstabellini@kernel.org> > > --- > > xen/include/asm-arm/alternative.h | 4 +--- > > 1 file changed, 1 insertion(+), 3 deletions(-) > > > > diff --git a/xen/include/asm-arm/alternative.h b/xen/include/asm-arm/alternative.h > > index dedb6dd001..2830a6da2d 100644 > > --- a/xen/include/asm-arm/alternative.h > > +++ b/xen/include/asm-arm/alternative.h > > @@ -116,13 +116,11 @@ int apply_alternatives(const struct alt_instr *start, const struct alt_instr *en > > * The code that follows this macro will be assembled and linked as > > * normal. There are no restrictions on this code. > > */ > > -.macro alternative_if_not cap, enable = 1 > > - .if \enable > > +.macro alternative_if_not cap > > .pushsection .altinstructions, "a" > > altinstruction_entry 661f, 663f, \cap, 662f-661f, 664f-663f > > .popsection > > 661: > > - .endif > > .endm > > > > /* > > > -- > Volodymyr Babchuk at EPAM
diff --git a/xen/include/asm-arm/alternative.h b/xen/include/asm-arm/alternative.h index dedb6dd001..2830a6da2d 100644 --- a/xen/include/asm-arm/alternative.h +++ b/xen/include/asm-arm/alternative.h @@ -116,13 +116,11 @@ int apply_alternatives(const struct alt_instr *start, const struct alt_instr *en * The code that follows this macro will be assembled and linked as * normal. There are no restrictions on this code. */ -.macro alternative_if_not cap, enable = 1 - .if \enable +.macro alternative_if_not cap .pushsection .altinstructions, "a" altinstruction_entry 661f, 663f, \cap, 662f-661f, 664f-663f .popsection 661: - .endif .endm /*
The macro alternative_if_not_cap is taking two parameters. The second parameter is never used and it is hard to see how this can be used correctly as it is only protecting the alternative section magic. Signed-off-by: Julien Grall <julien.grall@arm.com> --- xen/include/asm-arm/alternative.h | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-)