On 12/9/20 12:39 PM, Catalin Marinas wrote:
>> I would have thought that the best way is to use TCO, so that we don't have
>> to
>> have dual mappings (and however many MB of extra page tables that might
>> imply).
>
> The problem appears when the VMM wants to use MTE itself (e.g. linked
> again
On 12/9/20 9:27 AM, Catalin Marinas wrote:
> On Wed, Dec 09, 2020 at 01:25:18PM +, Marc Zyngier wrote:
>> Would this syscall operate on the guest address space? Or on the VMM's
>> own mapping?
...
> Whatever is easier for the VMM, I don't think it matters as long as the
> host kernel can get th
On 9/10/20 3:24 AM, Steven Price wrote:
> It is a shame, however I suspect this is because to use those instructions you
> need to know the block size held in GMID_EL1. And at least in theory that
> could
> vary between CPUs.
Which is no different from having to read DCZID_EL0 in order to impleme
On 9/4/20 9:00 AM, Steven Price wrote:
> 3. Doesn't provide any new methods for the VMM to access the tags on
> memory.
...
> (3) may be problematic and I'd welcome input from those familiar with
> VMMs. User space cannot access tags unless the memory is mapped with the
> PROT_MTE flag. Howeve
On 9/9/20 8:25 AM, Andrew Jones wrote:
>> * Provide a KVM-specific method to extract the tags from guest memory.
>>This might also have benefits in terms of providing an easy way to
>>read bulk tag data from guest memory (since the LDGM instruction
>>isn't available at EL0).
>
> Maybe
On 10/10/19 2:44 PM, Dave Martin wrote:
> #define PSR_IL_BIT (1 << 20)
> -#define PSR_BTYPE_CALL (2 << PSR_BTYPE_SHIFT)
> +
> +/* Convenience names for the values of PSTATE.BTYPE */
> +#define PSR_BTYPE_NONE (0b00 << PSR_BTYPE_SHIFT)
> +#define PSR_BTYPE_JC
On 10/11/19 11:10 AM, Mark Rutland wrote:
> On Thu, Oct 10, 2019 at 07:44:33PM +0100, Dave Martin wrote:
>> @@ -730,6 +730,11 @@ static void setup_return
>> regs->regs[29] = (unsigned long)&user->next_frame->fp;
>> regs->pc = (unsigned long)ka->sa.sa_handler;
>>
>> +if (system_suppo
On 12/10/18 2:12 PM, Kristina Martsenko wrote:
> The plan was to disable trapping, yes. However, after that thread there
> was a retrospective change applied to the architecture, such that the
> XPACLRI (and XPACD/XPACI) instructions are no longer trapped by
> HCR_EL2.API. (The public documentation
On 12/10/18 6:03 AM, Catalin Marinas wrote:
>> However, it won't be too long before someone implements support for
>> ARMv8.2-LVA, at which point, without changes to mandatory pointer tagging, we
>> will only have 3 authentication bits: [54:52]. This seems useless and easily
>> brute-force-able.
>
On 12/7/18 12:39 PM, Kristina Martsenko wrote:
> When pointer authentication is in use, data/instruction pointers have a
> number of PAC bits inserted into them. The number and position of these
> bits depends on the configured TCR_ELx.TxSZ and whether tagging is
> enabled. ARMv8.3 allows tagging t
+
> include/uapi/linux/elf.h | 1 +
> 4 files changed, 54 insertions(+)
Reviewed-by: Richard Henderson
r~
4/kernel/cpuinfo.c | 2 +
> arch/arm64/kernel/process.c | 4 ++
> 6 files changed, 100 insertions(+)
> create mode 100644 arch/arm64/include/asm/pointer_auth.h
Reviewed-by: Richard Henderson
r~
ture.c | 90
> +++++
> 3 files changed, 109 insertions(+), 1 deletion(-)
Reviewed-by: Richard Henderson
r~
rtsenko
> Acked-by: Christoffer Dall
> Cc: Catalin Marinas
> Cc: Marc Zyngier
> Cc: Will Deacon
> Cc: kvm...@lists.cs.columbia.edu
> ---
> arch/arm64/include/asm/kvm_arm.h | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
Reviewed-by: Richard Henderson
r~
On 12/7/18 12:39 PM, Kristina Martsenko wrote:
> From: Mark Rutland
>
> In subsequent patches we're going to expose ptrauth to the host kernel
> and userspace, but things are a bit trickier for guest kernels. For the
> time being, let's hide ptrauth from KVM guests.
>
> Regardless of how well-be
on
> Cc: kvm...@lists.cs.columbia.edu
> ---
> arch/arm64/include/asm/kvm_arm.h | 1 +
> arch/arm64/kernel/head.S | 5 ++---
> arch/arm64/kvm/hyp/switch.c | 2 +-
> 3 files changed, 4 insertions(+), 4 deletions(-)
Reviewed-by: Richard Henderson
r~
--
> 1 file changed, 7 insertions(+), 7 deletions(-)
Reviewed-by: Richard Henderson
r~
On 12/7/18 12:39 PM, Kristina Martsenko wrote:
> #define SCTLR_ELx_DSSBS (1UL << 44)
> +#define SCTLR_ELx_ENIA (1 << 31)
1U or 1UL lest you produce signed -0x8000.
Otherwise,
Reviewed-by: Richard Henderson
r~
related, I came across them, and asked Richard's permission
> to resurrect and resend the patch, with the changes Ingo asked for at
> the time.
>
> The important information about why we want these patch is in 1/2.
>
> Richard Henderson (2):
> x86: Use named addr
On 02/23/2018 10:19 AM, Al Viro wrote:
> For m68k,
> IIRC, qemu is mostly for coldfire and friends with aranym
> working for m68k/MMU testing.
Laurent Vivier is in the process of fixing that upstream, it won't all make
qemu 2.12. He has a branch with full support for a Mac Quadra 800:
https://
ople to be able to depend upon it.
v2: Added FPE_FIXME for alpha as Helge Deller pointed out
with his alternate patch one of the cases is SIGFPE not SIGTRAP.
Cc: Helge Deller
Cc: Richard Henderson
Cc: Ivan Kokshaysky
Cc: Matt Turner
Cc:linux-al...@vger.kernel.org
History Tree:https://git.
On 06/24/2017 08:32 AM, Logan Gunthorpe wrote:
So, IMO, the Jensen inq and outq funtions in your patch, which I did
read, should probably just not be provided.
So you would prefer a function containing BUG?
Because I have to have *something* to put into the machvec function pointer.
r~
On 06/24/2017 08:19 AM, Logan Gunthorpe wrote:
Hey,
On 24/06/17 09:13 AM, Richard Henderson wrote:
All Alpha hosts except for Jensen provide 64-bit I/O operations.
Jensen is EISA only, so there ought not be any devices that even
attempt such operations. But just in case, use 2 32-bit
All Alpha hosts except for Jensen provide 64-bit I/O operations.
Jensen is EISA only, so there ought not be any devices that even
attempt such operations. But just in case, use 2 32-bit operations.
Cc: Logan Gunthorpe
Cc: Ivan Kokshaysky
Cc: Matt Turner
Signed-off-by: Richard Henderson
| 3 +++
1 file changed, 3 insertions(+)
Reviewed-by: Richard Henderson
r~
o see that
an aarch64 defconfig still build setup-irq.o with the patch applied.
The intention is that this patch doesn't change the behavior of any
build.
Signed-off-by: Palmer Dabbelt
Reviewed-by: James Hogan
---
arch/alpha/Kconfig | 1 +
Acked-by: Richard Henderson
r~
Signed-off-by: Richard Henderson
---
arch/alpha/include/asm/unistd.h | 2 +-
arch/alpha/include/uapi/asm/unistd.h | 14 ++
arch/alpha/kernel/systbls.S | 9 +
3 files changed, 24 insertions(+), 1 deletion(-)
diff --git a/arch/alpha/include/asm/unistd.h b/arch
There are direct branches between {str*cpy,str*cat} and stx*cpy.
Ensure the branches are within range by merging these objects.
Signed-off-by: Richard Henderson
---
arch/alpha/lib/Makefile | 22 --
1 file changed, 16 insertions(+), 6 deletions(-)
diff --git a/arch/alpha/lib
(1) Wire up the new syscalls.
(2) Fix a build error causing ld to report out-of-range branches.
(3) Fix a build error for the EV6 assembler.
Suggestions on a better way to implement the second patch within
the Kbuild infrastructure are welcomed.
r~
Richard Henderson (3):
alpha: Update for
Patch 8525023121de4848b5f0a7d867ffeadbc44d introduced a typo.
That said, the identity AND insns added by that patch are more
clearly written as MOV. At the same time, re-schedule the ev6
version so that the first dispatch can execute in parallel.
Signed-off-by: Richard Henderson
---
arch
On 06/22/2017 09:48 AM, Logan Gunthorpe wrote:
Alpha implements its own io operation and doesn't use the
common library. Thus to make ioread64 and iowrite64 globally
available we need to add implementations for alpha.
For this, we simply use calls that chain two 32-bit operations.
(mostly becaus
On 06/01/2017 01:00 PM, Aleksa Sarai wrote:
--- a/arch/alpha/include/uapi/asm/ioctls.h
+++ b/arch/alpha/include/uapi/asm/ioctls.h
@@ -94,6 +94,7 @@
#define TIOCSRS485 _IOWR('T', 0x2F, struct serial_rs485)
#define TIOCGPTN _IOR('T',0x30, unsigned int) /* Get Pty Number (of
pty-mux d
On 02/23/2017 01:22 AM, Stafford Horne wrote:
static inline int __atomic_add_unless(atomic_t *v, int a, int u)
{
int old, tmp;
__asm__ __volatile__(
"1: l.lwa %0, 0(%2) \n"
" l.sfeq %0, %4 \n"
" l.b
On 02/23/2017 01:20 AM, Stafford Horne wrote:
On Wed, Feb 22, 2017 at 12:19:40PM +0100, Peter Zijlstra wrote:
On Wed, Feb 22, 2017 at 04:11:37AM +0900, Stafford Horne wrote:
+ __asm__ __volatile__(
+ "1:l.lwa %0, 0(%1) \n"
+ " l.sfeq %0, %2
I'm pleased to be able to announce an initial implementation of an (e)bpf
backend for systemtap. For the subset of systemtap probes that can use
kprobes, we can use a bpf filter instead of loading a kernel module.
As this implementation is young, there are a number of limitations. Neither
st
On 04/22/2016 02:04 AM, Peter Zijlstra wrote:
> + "1: ldl_l %0,%1\n" \
> + " mov %0,%2\n"\
> + " " #asm_op " %0,%3,%0\n" \
> + " stl_c %0,%1\n"
On 03/26/2016 10:43 PM, zhaoxiu.zeng wrote:
From: Zeng Zhaoxiu
Signed-off-by: Zeng Zhaoxiu
---
arch/alpha/include/asm/bitops.h | 27 +++
1 file changed, 27 insertions(+)
Acked-by: Richard Henderson
r~
__uv_hub_info
...
+ movzbl 0x15(%rax,%r9,1),%ecx
...
+ or (%rax,%r9,1),%rdx
The final vmlinux text size is reduced by about 5k for a standard
Fedora configure.
Cc: Ingo Molnar
Cc: "H. Peter Anvin"
Signed-off-by: Richard Henderson
---
arch/x86/include/asm/perc
On 11/30/2015 01:29 PM, Rasmus Villemoes wrote:
./arch/alpha/boot/main.c:187:1-4: no-op delay loop
Not sure why this is there. The runkernel function that preceeds it cannot
return, having performed an indirect branch (not a call) to the kernel start.
I see no reason to actually change anyt
thing* from the other maintainers.
Ping again for the other-architecture maintainers (alpha, s390, sh,
sparc)
I thought I already gave an
Acked-by: Richard Henderson
for the alpha patches.
r~
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On 05/04/2015 01:45 PM, Linus Torvalds wrote:
> On Mon, May 4, 2015 at 1:33 PM, Richard Henderson wrote:
>>
>> A fair point. Though honestly, I was hoping that this feature would mostly
>> be
>> used for conditions that are "weird" -- that is, not normall
On 05/04/2015 01:14 PM, H. Peter Anvin wrote:
> On 05/04/2015 12:33 PM, Richard Henderson wrote:
>>
>> (0) The C level output variable should be an integral type, from bool on up.
>>
>> The flags are a scarse resource, easily clobbered. We cannot allow user code
&
On 05/02/2015 05:39 AM, Peter Zijlstra wrote:
> static inline bool __test_and_clear_bit(long nr, volatile unsigned long *addr)
> {
> bool oldbit;
>
> asm volatile ("btr %2, %1"
> : "CF" (oldbit), "+m" (*addr)
> : "Ir" (nr));
>
> return old
On 05/02/2015 05:39 AM, Peter Zijlstra wrote:
> On Fri, May 01, 2015 at 01:49:52PM -0700, Linus Torvalds wrote:
>> On Fri, May 1, 2015 at 12:02 PM, Vladimir Makarov
>> wrote:
>>>
>>> GCC RA is a major reason to prohibit output operands for asm goto.
>>
>> Hmm.. Thinking some more about it, I th
On 02/17/2015 06:24 AM, Michael Mueller wrote:
> +static inline uint64_t big_endian_bit(unsigned long nr)
> +{
> +return 1ul << (BITS_PER_LONG - (nr % BITS_PER_LONG));
> +};
This is buggy. NR=0 should map to 63, not 64.
> +return !!(*ptr & big_endian_bit(nr));
Personally I dislike !! as
On 02/17/2015 06:24 AM, Michael Mueller wrote:
> +/**
> + * s390_test_facility - test if given facility bit is set facility list
> + * of given cpu class
> + * @class: address of cpu class to test
> + * @nr: bit number to test
> + *
> + * Returns: true in case it is set
> + *
On 02/06/2015 06:50 AM, Kirill A. Shutemov wrote:
> We would want to use number of page table level to define mm_struct.
> Let's expose it as CONFIG_PGTABLE_LEVELS.
>
> Signed-off-by: Kirill A. Shutemov
> Cc: Richard Henderson
> Cc: Ivan Kokshaysky
> Cc: Matt Turner
On 07/30/2014 12:04 PM, Måns Rullgård wrote:
> Richard Henderson writes:
>
>> The assignment to regs->r20 kills the original tls_val input
>> to the clone syscall, which means that clone can no longer be
>> restarted with the original inputs.
>>
>> We coul
On 07/30/2014 12:21 PM, Michael Cree wrote:
> On Wed, Jul 30, 2014 at 11:42:32AM -1000, Richard Henderson wrote:
>> Signed-off-by: Richard Henderson
>> ---
>> arch/alpha/include/asm/unistd.h | 2 +-
>> arch/alpha/include/uapi/asm/unistd.h | 3 +++
>> arch/al
Signed-off-by: Richard Henderson
---
arch/alpha/include/asm/unistd.h | 2 +-
arch/alpha/include/uapi/asm/unistd.h | 3 +++
arch/alpha/kernel/systbls.S | 3 +++
3 files changed, 7 insertions(+), 1 deletion(-)
diff --git a/arch/alpha/include/asm/unistd.h b/arch/alpha/include/asm
the r20 result value, instead always testing r0 vs 0 to
determine the child/parent status.
This failure can be seen in the glibc nptl/tst-eintr* tests.
Reported-by: Michael Cree
Signed-off-by: Richard Henderson
---
arch/alpha/kernel/process.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/a
The first patch should fix the clone bug that Michael Cree reported.
The second patch adds the three new syscalls since the last update.
The tree can be found at
git://github.com/rth7680/linux.git axp-next
r~
Richard Henderson (2):
alpha: Remove "strange" OSF/1 fork semanti
Ok, I think I've actually found it this time. It's here:
> 281 childregs->r20 = 1; /* OSF/1 has some strange fork()
> semantics. */
> 282 regs->r20 = 0;
We need to delay this r20 silliness until after restarts or something. Or just
kill it -- it's not like glibc uses t
On 07/22/2014 10:52 PM, Michael Cree wrote:
> Running strace on nptl/tst-eintr3 reveals that the clone() syscall
> is retried by the kernel if an ERESTARTNOINTR error occurs. At
> $syscall_error in arch/alpha/kernel/entry.S the kernel handles the
> error and in doing that it writes to 72(sp) which
On 07/15/2014 06:54 AM, Peter Hurley wrote:
>
> Jonathan Corbet wrote a LWN article about this back in 2012:
> http://lwn.net/Articles/478657/
>
> I guess it's fixed in gcc 4.8, but too bad there's not a workaround for
> earlier compilers (akin to -fstrict_volatile_bitfields without requiring
> t
On 07/03/2014 10:21 AM, Nick Krause wrote:
> There seems to be a Fix Me message on line 892 due to info.si_addr = NULL.
> I am wondering what value I should declare this variable to instead of Null.
> Cheers Nick
>
The closest thing to compatibility with SIGFPE raised through normal arithmetic
wo
e vein as
> the relaxed read macros, which are already implemented.
>
> Cc: Richard Henderson
> Cc: Ivan Kokshaysky
> Cc: Matt Turner
> Signed-off-by: Will Deacon
> ---
> arch/alpha/include/asm/io.h | 12
> 1 file changed, 8 insertions(+), 4 deletions(-
Thomas Gleixner
> Cc: Andy Lutomirski
> Cc: Richard Henderson
> Signed-off-by: Peter Zijlstra
> ---
> arch/alpha/include/asm/thread_info.h | 4 ++--
> 1 file changed, 2 inser
Acked-by: Richard Henderson
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e next.
Acked-by: Richard Henderson
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Please read the FAQ at http://www.tux.org/lkml/
nce does not change the init order, making the
> impact of this change zero. Should someone with real hardware
> for boot testing want to change it later to arch_initcall or
> console_initcall, they can do that at a later date.
>
> Cc: Richard Henderson
> Cc: Ivan Kokshaysky
>
On 01/14/2014 09:08 AM, Matt Turner wrote:
> On Tue, Jan 14, 2014 at 3:03 AM, Peter Zijlstra wrote:
>> On Tue, Jan 14, 2014 at 10:28:23AM +0800, Daniel J Blueman wrote:
Peter,
I found out that the build failure was caused by the fact that the
__native_word() macro (used interna
x = __get_cpu_var(y);
>
>Converts to
>
> memcpy(&x, this_cpu_ptr(&y), sizeof(x));
>
>
> 5. Assignment to a per cpu variable
>
> DEFINE_PER_CPU(int, y)
> __get_cpu_var(y) = x;
>
>Converts to
>
> this_cpu_write(y, x
On 11/20/2013 03:33 AM, Peter Zijlstra wrote:
> On Tue, Nov 19, 2013 at 05:02:20PM +, Mathieu Desnoyers wrote:
>> Unfortunately I don't have a ARM cross-compiler setup ready. Nathan could
>> test
>> it for us though.
>>
>> It might shuffle things around enough to work around the issue, but wit
On 11/13/2013 05:42 AM, Geert Uytterhoeven wrote:
> Signed-off-by: Geert Uytterhoeven
> Cc: Richard Henderson
> Cc: linux-al...@vger.kernel.org
> ---
> arch/alpha/include/asm/Kbuild |2 +-
> arch/alpha/include/asm/sections.h |7 ---
> 2 files changed, 1 inse
On 10/10/2013 08:12 AM, Ingo Molnar wrote:
> Indeed. Something like the updated version below?
>
> [ I kept the asm_volatile_goto() naming to make sure the implicit volatile
> is visible. ]
>
> Thanks,
>
> Ingo
Looks good.
Reviewed-by: Richard Henderson
r
On 10/10/2013 01:31 AM, Jakub Jelinek wrote:
> Also, for the bitops patch, you probably want an asm_volatile_goto variant.
Why? Asm without output (which asm goto must be) are automatically volatile.
r!
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_bool y
>
> +config ARCH_MAY_HAVE_PC_PARPORT
> + def_bool y
> +
Acked-by: Richard Henderson
r~
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On 08/05/2013 09:57 AM, Jason Baron wrote:
> On 08/05/2013 03:40 PM, Marek Polacek wrote:
>> On Mon, Aug 05, 2013 at 11:34:55AM -0700, Linus Torvalds wrote:
>>> On Mon, Aug 5, 2013 at 11:24 AM, Linus Torvalds
>>> wrote:
Ugh. I can see the attraction of your section thing for that case, I
On 07/24/2013 12:25 AM, Michael Cree wrote:
> Searching for NR_umount finds the following packages that compile on
> Alpha:
>
> eglibc
Fork of glibc, which I did examine; I'll assume it's the same code.
> dietlibc
> uclibc
Rob reports that uclibc is fixed by the rename. From what I see in
the
On 07/22/2013 07:25 PM, Michael Cree wrote:
> I wondered if your proposal will break glibc as glibc checks for
> __NR_oldumount and does different things based on that. But maybe your
> fix will not adversely affect glibc (I did not look particularly closely
> to see if so), but even so, there is
On 07/18/2013 02:28 PM, Michael Cree wrote:
> The kernel without the patch set has the "Using epoch 2000" line and
> the kernel with the patch set is missing the "Using epoch 2000" line.
Ah hah. You appear to be missing CONFIG_RTC_DRV_ALPHA in the new kernel, so
you have no support for the RTC at
On 07/17/2013 06:14 PM, Michael Cree wrote:
> Tested the patch series applied against 3.10.1 on a 3-CPU ES45. System came
> up fine but I noticed date was wrong and had been reset back to the start
> of the epoch (Jan 1 1970). Appears it is not reading hardware clock
> correctly on boot.
Please
On 07/16/2013 10:17 PM, Matt Turner wrote:
> On Tue, Jul 16, 2013 at 10:34 AM, Richard Henderson wrote:
>> Use WTINT to wait for the next interrupt. Squash the WTINT call
>> if the PALcode doesn't support it (e.g. MILO). No attempt is yet
>> made to skip clock ticks d
On 07/16/2013 09:29 PM, Matt Turner wrote:
> I've got five patches in a for-linus branch on kernel.org that I was
> planning to send a pull request for soon. Would you like me to add
> these to that branch?
Yes, please.
r~
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On 07/16/2013 10:19 AM, Joe Perches wrote:
> On Tue, 2013-07-16 at 10:04 -0700, Richard Henderson wrote:
>> Remove the compile warning for __udiv_qrnnd not having a prototype.
>> Use the __builtin_alpha_umulh introduced in gcc 4.0.
>
> Isn't gcc 3.x still a su
In the normal case, one wants the guest to follow the host time.
QEMU has a cserve call that retrieves the wall clock.
Signed-off-by: Richard Henderson
---
arch/alpha/include/asm/pal.h | 56 ++
arch/alpha/kernel/Makefile | 3 +-
arch/alpha/kernel/rtc.c
The code as written is correct, and will be used by QEMU emulation.
Signed-off-by: Richard Henderson
---
arch/alpha/kernel/sys_dp264.c | 8
1 file changed, 8 deletions(-)
diff --git a/arch/alpha/kernel/sys_dp264.c b/arch/alpha/kernel/sys_dp264.c
index 5bf401f..6c35159 100644
--- a
This kernel/user split was done long ago for other architectures.
Signed-off-by: Richard Henderson
---
arch/alpha/include/asm/param.h | 8 +---
arch/alpha/include/uapi/asm/param.h | 7 ---
2 files changed, 5 insertions(+), 10 deletions(-)
diff --git a/arch/alpha/include/asm
Use WTINT to wait for the next interrupt. Squash the WTINT call
if the PALcode doesn't support it (e.g. MILO). No attempt is yet
made to skip clock ticks during normal scheduling in order to stay
in power down mode longer.
Signed-off-by: Richard Henderson
---
arch/alpha/include/asm/
When building a generic kernel, do a run-time check on the serial
number, like we do for MILO. When building a custom kernel, make
this a configure-time check.
Signed-off-by: Richard Henderson
---
arch/alpha/Kconfig | 14 ++
arch/alpha/include/asm/machvec.h | 18
ourse.
So I'm hoping that someone will notice this and help me out with testing.
In addition, if folks more familiar with the various kernel/time or
driver/rtc interfaces spot anything I'm doing wrong in the rewrite,
please let me know.
r~
Richard Henderson (10):
alpha: Don&#
This allows us to get rid of some hacky code for SMP. Get rid of
some cycle counter hackery that's now handled by generic code via
clocksource + clock_event_device objects.
Cc: Thomas Gleixner
Signed-off-by: Richard Henderson
---
arch/alpha/Kconfig| 1 +
arch/alpha/k
tc-li...@googlegroups.com
Signed-off-by: Richard Henderson
---
arch/alpha/Kconfig | 1 -
arch/alpha/include/asm/machvec.h | 4 +-
arch/alpha/include/asm/rtc.h | 11 --
arch/alpha/kernel/Makefile | 1 +
arch/alpha/kernel/machvec_impl.h | 5 +-
arch/alpha/kernel/proto.h
Don't depend on SMP, just check the number of processors online.
This allows a single distribution kernel to use the clocksource
when run on a single processor machine.
Signed-off-by: Richard Henderson
---
arch/alpha/kernel/time.c | 58 +++-
1
With the 1024Hz default, we spend 50% of QEMU emulation
processing timer interrupts.
Signed-off-by: Richard Henderson
---
arch/alpha/Kconfig| 36 ++--
arch/alpha/kernel/setup.c | 10 --
arch/alpha/kernel/time.c | 24 +---
3
QEMU provides a high-resolution timer and alarm; use this for
a clock source and clock event source when available.
Cc: Thomas Gleixner
Signed-off-by: Richard Henderson
---
arch/alpha/include/asm/pal.h | 14 ++
arch/alpha/kernel/irq_alpha.c | 2 +-
arch/alpha/kernel/proto.h | 2
Having unwind info past the PALcode generated stack frame makes
debugging the kernel significantly easier.
Signed-off-by: Richard Henderson
---
arch/alpha/kernel/entry.S | 399 +-
1 file changed, 288 insertions(+), 111 deletions(-)
diff --git a/arch
Signed-off-by: Richard Henderson
---
arch/alpha/include/asm/unistd.h | 3 +--
arch/alpha/include/uapi/asm/unistd.h | 2 ++
arch/alpha/kernel/systbls.S | 2 ++
3 files changed, 5 insertions(+), 2 deletions(-)
diff --git a/arch/alpha/include/asm/unistd.h b/arch/alpha/include/asm
09:55:06
-0700)
--------
Richard Henderson (7):
alpha: Add kcmp and finit_module syscalls
alpha: Eliminate compiler warning from memset macro
alpha: Modernize lib/mpi/longlong.h
alpha: Improve atomic_add_unless
alpha: Implement atomic64_dec_if_positive
alpha: Generat
Remove the compile warning for __udiv_qrnnd not having a prototype.
Use the __builtin_alpha_umulh introduced in gcc 4.0.
Signed-off-by: Richard Henderson
---
lib/mpi/longlong.h | 17 +++--
1 file changed, 7 insertions(+), 10 deletions(-)
diff --git a/lib/mpi/longlong.h b/lib/mpi
Signed-off-by: Richard Henderson
---
arch/alpha/Kconfig | 1 +
arch/alpha/include/asm/atomic.h | 28
2 files changed, 29 insertions(+)
diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig
index 837a1f2..082d9b4 100644
--- a/arch/alpha/Kconfig
+++ b
Use ll/sc loops instead of C loops around cmpxchg.
Update the atomic64_add_unless block comment to match the code.
Signed-off-by: Richard Henderson
---
arch/alpha/include/asm/atomic.h | 60 +
1 file changed, 37 insertions(+), 23 deletions(-)
diff --git a
mset’
? __builtin_memset((s),0,(n)) \
^
Converting the macro to an inline function eliminates this problem.
Signed-off-by: Richard Henderson
---
arch/alpha/include/asm/string.h | 18 --
1 file changed, 12 insertions(+), 6 deletions(-)
diff --git a/
Signed-off-by: Richard Henderson
---
arch/alpha/kernel/sys_marvel.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/alpha/kernel/sys_marvel.c b/arch/alpha/kernel/sys_marvel.c
index 407accc..53d6e4a 100644
--- a/arch/alpha/kernel/sys_marvel.c
+++ b/arch/alpha/kernel
On Thu, Dec 20, 2007 at 02:24:48PM -0800, Linus Torvalds wrote:
> I'm not exactly 100% happy with it, but it does mean that if we need a big
> area, we'll relax the suggested starting point by that amount. It's not
> wonderful, but it essentially admits that the minimum for the allocations
> is
On Tue, Dec 18, 2007 at 05:38:58PM -0800, Linus Torvalds wrote:
> That
>
> PCI: Cannot allocate resource region 9 of bridge :00:01.0
> PCI: Cannot allocate resource region 1 of device :01:00.0
>
> thing is really starting to bug me.
>
> I bet that is the real problem here, bu
On Tue, Dec 18, 2007 at 07:55:37PM -0500, Chuck Ebbert wrote:
> You can boot with "pci=mmconf" to enable it.
Heh.
PCI: BIOS Bug: MCFG area at e000 is not E820-reserved
PCI: Not using MMCONFIG.
r~
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On Tue, Dec 18, 2007 at 04:46:09PM -0500, Chuck Ebbert wrote:
> pnpacpi=off should work.
This does result in the graphics bar being placed at e000,
and does result in a system lockup when X starts. So it appears
as if there's really something there.
r~
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On Tue, Dec 18, 2007 at 01:09:15PM -0800, Linus Torvalds wrote:
> However, I wonder about that
>
> e000-efff : pnp 00:0b
>
> thing. I actually suspect that that whole allocation is literally *meant*
> for that 256MB graphics aperture, but the kernel explicitly avoids it
> because
On Tue, Dec 18, 2007 at 10:21:50AM -0800, Linus Torvalds wrote:
> > https://bugzilla.redhat.com/show_bug.cgi?id=425794#c0
>
> That bugzilla entry doesn't even have a dmesg output or anything like
> that. I'd really like to see what the
I've added dmesg, /proc/iomem, and lspci -v output to that
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