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10 Commits

Author SHA1 Message Date
Christophe Leroy
b6254ced4d powerpc/signal: Don't manage floating point regs when no FPU 
There is no point in copying floating point regs when there
is no FPU and MATH_EMULATION is not selected.

Create a new CONFIG_PPC_FPU_REGS bool that is selected by
CONFIG_MATH_EMULATION and CONFIG_PPC_FPU, and use it to
opt out everything related to fp_state in thread_struct.

The asm const used only by fpu.S are opted out with CONFIG_PPC_FPU
as fpu.S build is conditionnal to CONFIG_PPC_FPU.

The following app spends approx 8.1 seconds system time on an 8xx
without the patch, and 7.0 seconds with the patch (13.5% reduction).

On an 832x, it spends approx 2.6 seconds system time without
the patch and 2.1 seconds with the patch (19% reduction).

	void sigusr1(int sig) { }

	int main(int argc, char **argv)
	{
		int i = 100000;

		signal(SIGUSR1, sigusr1);
		for (;i--;)
			raise(SIGUSR1);
		exit(0);
	}

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/7569070083e6cd5b279bb5023da601aba3c06f3c.1597770847.git.christophe.leroy@csgroup.eu
 2020-12-04 01:01:11 +11:00
Christophe Leroy
4d90eb97e2 powerpc/ptrace: Create ptrace_get_fpr() and ptrace_put_fpr() 
On the same model as ptrace_get_reg() and ptrace_put_reg(),
create ptrace_get_fpr() and ptrace_put_fpr() to get/set
the floating points registers.

We move the boundary checkings in them.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/24a1baedea7f7ae7b6bf27be98bab6d01b5ca2c1.1597770847.git.christophe.leroy@csgroup.eu
 2020-12-04 01:01:11 +11:00
Michal Suchanek
0a7601b6ff powerpc/64: make buildable without CONFIG_COMPAT 
There are numerous references to 32bit functions in generic and 64bit
code so ifdef them out.

Signed-off-by: Michal Suchanek <msuchanek@suse.de>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/e5619617020ef3a1f54f0c076e7d74cb9ec9f3bf.1584699455.git.msuchanek@suse.de
 2020-04-03 00:10:00 +11:00
Christophe Leroy
323a780ca1 powerpc/ptrace: split out ADV_DEBUG_REGS related functions. 
Move ADV_DEBUG_REGS functions out of ptrace.c, into
ptrace-adv.c and ptrace-noadv.c

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
[mpe: Squash in fixup patch from Christophe]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/e2bd7d275bd5933d848aad4fee3ca652a14d039b.1582848567.git.christophe.leroy@c-s.fr
 2020-04-01 14:30:49 +11:00
Christophe Leroy
6e0b79750c powerpc/ptrace: move register viewing functions out of ptrace.c 
Create a dedicated ptrace-view.c file.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/bfd8c3ed57c9057e4a5d3816737b5ee98c6f7e43.1582848567.git.christophe.leroy@c-s.fr
 2020-04-01 14:30:48 +11:00
Christophe Leroy
7c1f8db019 powerpc/ptrace: split out TRANSACTIONAL_MEM related functions. 
Move TRANSACTIONAL_MEM functions out of ptrace.c, into
ptrace-tm.c

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/2d0ef3bb2610c0344bd42252c7134f429818c000.1582848567.git.christophe.leroy@c-s.fr
 2020-04-01 14:30:48 +11:00
Christophe Leroy
60ef9dbd9d powerpc/ptrace: split out SPE related functions. 
Move CONFIG_SPE functions out of ptrace.c, into
ptrace-spe.c

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/0f17a331760310b5562fae3791cdd3cf9c64237b.1582848567.git.christophe.leroy@c-s.fr
 2020-04-01 14:30:48 +11:00
Christophe Leroy
1b20773b00 powerpc/ptrace: split out ALTIVEC related functions. 
Move CONFIG_ALTIVEC functions out of ptrace.c, into
ptrace-altivec.c

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/35dae891d01c817fca0fd6ab406a3a2c7bf07f60.1582848567.git.christophe.leroy@c-s.fr
 2020-04-01 14:30:48 +11:00
Christophe Leroy
7b99ed4e8e powerpc/ptrace: split out VSX related functions. 
Move CONFIG_VSX functions out of ptrace.c, into
ptrace-vsx.c and ptrace-novsx.c

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/dc8e20c8c95b7e83add0c6dd48f9470628896c5c.1582848567.git.christophe.leroy@c-s.fr
 2020-04-01 14:30:48 +11:00
Christophe Leroy
da9a1c10e2 powerpc: Move ptrace into a subdirectory. 
In order to allow splitting of ptrace depending on the different
CONFIG_ options, create a subdirectory dedicated to ptrace and move
ptrace.c and ptrace32.c into it.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/9ebcbe37834e9d447dd97f4381084795a673260c.1582848567.git.christophe.leroy@c-s.fr
 2020-04-01 14:30:41 +11:00