Commit graph

12 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
Christophe Leroy
67e364b329 powerpc/ptrace: Move declaration of ptrace_get_reg() and ptrace_set_reg()
ptrace_get_reg() and ptrace_set_reg() are only used internally by
ptrace.

Move them in arch/powerpc/kernel/ptrace/ptrace-decl.h

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/376c258267aeae54a4423bc4a2e107a9611f0039.1597770847.git.christophe.leroy@csgroup.eu
2020-12-04 01:01:11 +11:00
Al Viro
47e12855a9 powerpc: switch to ->regset_get()
Note: compat variant of REGSET_TM_CGPR is almost certainly wrong;
it claims to be 48*64bit, but just as compat REGSET_GPR it stores
44*32bit of (truncated) registers + 4 32bit zeros... followed by
48 more 32bit zeroes.  Might be too late to change - it's a userland
ABI, after all ;-/

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2020-07-27 14:31:07 -04:00
Christophe Leroy
da529d4739 powerpc/ptrace: create ppc_gethwdinfo()
Create ippc_gethwdinfo() to handle PPC_PTRACE_GETHWDBGINFO and
reduce ifdef mess

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/82fefcc1ec75b96cece792878217a5d85ecda0c2.1582848567.git.christophe.leroy@c-s.fr
2020-04-01 14:30:49 +11:00
Christophe Leroy
e08227d25a powerpc/ptrace: create ptrace_get_debugreg()
Create ptrace_get_debugreg() to handle PTRACE_GET_DEBUGREG and
reduce ifdef mess

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/c1482c41a39cc216f4073a51070d8680f52d5054.1582848567.git.christophe.leroy@c-s.fr
2020-04-01 14:30:49 +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