search for: irqs_pend

The assumption that we have an overall irqs_pending flags, and a one-to-one lguest <-> task mapping fails to hold on x86_64, where we can have multiple puppies, aka vcpus. Although ifdefs could be used, it makes the code much more unreadable, and other ports are on the way, anyway. So some sort of acessor is preferred anyway. Signed-off-b...

The assumption that we have an overall irqs_pending flags, and a one-to-one lguest <-> task mapping fails to hold on x86_64, where we can have multiple puppies, aka vcpus. Although ifdefs could be used, it makes the code much more unreadable, and other ports are on the way, anyway. So some sort of acessor is preferred anyway. Signed-off-b...

The following patches are the latest update of the TSC and hrtimer patches I posted on 29/03. Rusty's original TSC patch has been resynced to the latest lguest repo, as has the hrtimer patch, which also incorporates feedback from Jeremy & Rusty: - Change clock event hrtimer to absolute time. 'now' is captured in the host during the hypercall. - Propagate -ETIME back to the

The following patches are the latest update of the TSC and hrtimer patches I posted on 29/03. Rusty's original TSC patch has been resynced to the latest lguest repo, as has the hrtimer patch, which also incorporates feedback from Jeremy & Rusty: - Change clock event hrtimer to absolute time. 'now' is captured in the host during the hypercall. - Propagate -ETIME back to the

Hi all, Lguest is a simple hypervisor which runs Linux under Linux, without needing VT hardware. Two people asked if I had a version of lguest which worked on other-than-bleeding-edge-mm kernels, so I did a backport of the latest version to 2.6.21. http://lguest.ozlabs.org/lguest-2.6.21-254.patch.gz See Documentation/lguest/lguest.txt for how to run, drivers/lguest/README for the draft code

Hi all, Lguest is a simple hypervisor which runs Linux under Linux, without needing VT hardware. Two people asked if I had a version of lguest which worked on other-than-bleeding-edge-mm kernels, so I did a backport of the latest version to 2.6.21. http://lguest.ozlabs.org/lguest-2.6.21-254.patch.gz See Documentation/lguest/lguest.txt for how to run, drivers/lguest/README for the draft code

1) Example code: old libc headers don't have SIOCBRADDIF, and old zlibs don't have gzdirect() -- it's a sanity check anyway. 2) Some people don't build in their source directories, so .config isn't there (thanks to Tony Breeds <tony@bakeyournoodle.com>). 3) Point out that guest and host kernel are usually the same. 4) Set the "no checksum" option on the

1) Example code: old libc headers don't have SIOCBRADDIF, and old zlibs don't have gzdirect() -- it's a sanity check anyway. 2) Some people don't build in their source directories, so .config isn't there (thanks to Tony Breeds <tony@bakeyournoodle.com>). 3) Point out that guest and host kernel are usually the same. 4) Set the "no checksum" option on the

this patch makes room for the vcpu structure in lguest, already used in this very same way at lguest64. It's the first part of our plan to have lguest and lguest64 unified too. When two dogs hang out, you don't have new puppies right in the other day. Some time has to be elapsed. They have to grow first. In this same spirit, having these patches _do not_ mean smp guests can be launched

this patch makes room for the vcpu structure in lguest, already used in this very same way at lguest64. It's the first part of our plan to have lguest and lguest64 unified too. When two dogs hang out, you don't have new puppies right in the other day. Some time has to be elapsed. They have to grow first. In this same spirit, having these patches _do not_ mean smp guests can be launched

...; +} diff -r 144835834edd drivers/lguest/interrupts_and_traps.c --- a/drivers/lguest/interrupts_and_traps.c Sat Jul 21 11:12:01 2007 +1000 +++ b/drivers/lguest/interrupts_and_traps.c Sun Jul 22 20:47:51 2007 +1000 @@ -107,6 +107,7 @@ void maybe_do_interrupt(struct lguest *l clear_bit(irq, lg->irqs_pending); set_guest_interrupt(lg, idt->a, idt->b, 0); } + write_timestamp(lg); } static int has_err(unsigned int trap) diff -r 144835834edd drivers/lguest/lg.h --- a/drivers/lguest/lg.h Sat Jul 21 11:12:01 2007 +1000 +++ b/drivers/lguest/lg.h Sun Jul 22 20:49:03 2007 +1000 @@ -243,6 +243,...

...; +} diff -r 144835834edd drivers/lguest/interrupts_and_traps.c --- a/drivers/lguest/interrupts_and_traps.c Sat Jul 21 11:12:01 2007 +1000 +++ b/drivers/lguest/interrupts_and_traps.c Sun Jul 22 20:47:51 2007 +1000 @@ -107,6 +107,7 @@ void maybe_do_interrupt(struct lguest *l clear_bit(irq, lg->irqs_pending); set_guest_interrupt(lg, idt->a, idt->b, 0); } + write_timestamp(lg); } static int has_err(unsigned int trap) diff -r 144835834edd drivers/lguest/lg.h --- a/drivers/lguest/lg.h Sat Jul 21 11:12:01 2007 +1000 +++ b/drivers/lguest/lg.h Sun Jul 22 20:49:03 2007 +1000 @@ -243,6 +243,...

...rrupts"); +} + +void maybe_do_interrupt(struct lguest *lg) +{ + unsigned int irq; + DECLARE_BITMAP(blk, LGUEST_IRQS); + struct desc_struct *idt; + + if (!lg->lguest_data) + return; + + /* If timer has changed, set timer interrupt. */ + if (jiffies != lg->last_timer) + set_bit(0, lg->irqs_pending); + + /* Mask out any interrupts they have blocked. */ + if (copy_from_user(&blk, lg->lguest_data->blocked_interrupts, + sizeof(blk))) + return; + + bitmap_andnot(blk, lg->irqs_pending, blk, LGUEST_IRQS); + + irq = find_first_bit(blk, LGUEST_IRQS); + if (irq >= LGUEST_IRQS)...

...rrupts"); +} + +void maybe_do_interrupt(struct lguest *lg) +{ + unsigned int irq; + DECLARE_BITMAP(blk, LGUEST_IRQS); + struct desc_struct *idt; + + if (!lg->lguest_data) + return; + + /* If timer has changed, set timer interrupt. */ + if (jiffies != lg->last_timer) + set_bit(0, lg->irqs_pending); + + /* Mask out any interrupts they have blocked. */ + if (copy_from_user(&blk, lg->lguest_data->blocked_interrupts, + sizeof(blk))) + return; + + bitmap_andnot(blk, lg->irqs_pending, blk, LGUEST_IRQS); + + irq = find_first_bit(blk, LGUEST_IRQS); + if (irq >= LGUEST_IRQS)...

...of(struct lguest_dma) + + offsetof(struct lguest_dma, used_len); + lhwrite_other(dstlg, used_lenp, &ret, sizeof(ret)); + dst->next_dma++; + } + up_read(&dstlg->mm->mmap_sem); + + /* Do this last so dst doesn't simply sleep on lock. */ + set_bit(dst->interrupt, dstlg->irqs_pending); + set_wakeup_process(srclg, dstlg->tsk); + return i == dst->num_dmas; + +fail: + up_read(&dstlg->mm->mmap_sem); +#endif + return 0; +} + +int send_dma(struct lguest_guest_info *linfo, unsigned long addr, + unsigned long udma) +{ + union futex_key key; + int pending = 0, e...

...of(struct lguest_dma) + + offsetof(struct lguest_dma, used_len); + lhwrite_other(dstlg, used_lenp, &ret, sizeof(ret)); + dst->next_dma++; + } + up_read(&dstlg->mm->mmap_sem); + + /* Do this last so dst doesn't simply sleep on lock. */ + set_bit(dst->interrupt, dstlg->irqs_pending); + set_wakeup_process(srclg, dstlg->tsk); + return i == dst->num_dmas; + +fail: + up_read(&dstlg->mm->mmap_sem); +#endif + return 0; +} + +int send_dma(struct lguest_guest_info *linfo, unsigned long addr, + unsigned long udma) +{ + union futex_key key; + int pending = 0, e...

...truct lguest_vcpu *vcpu) +{ + unsigned int irq; + DECLARE_BITMAP(irqs, LGUEST_IRQS); + + if (!vcpu->guest->lguest_data) + return; + + /* If timer has changed, set timer interrupt. */ + if (vcpu->guest->timer_on && jiffies != vcpu->guest->last_timer) + set_bit(0, vcpu->irqs_pending); + + /* Mask out any interrupts they have blocked. */ + if (copy_from_user(&irqs, vcpu->guest->lguest_data->interrupts, + sizeof(irqs))) + return; + + bitmap_andnot(irqs, vcpu->irqs_pending, irqs, LGUEST_IRQS); + + irq = find_first_bit(irqs, LGUEST_IRQS); + if (irq >=...

...truct lguest_vcpu *vcpu) +{ + unsigned int irq; + DECLARE_BITMAP(irqs, LGUEST_IRQS); + + if (!vcpu->guest->lguest_data) + return; + + /* If timer has changed, set timer interrupt. */ + if (vcpu->guest->timer_on && jiffies != vcpu->guest->last_timer) + set_bit(0, vcpu->irqs_pending); + + /* Mask out any interrupts they have blocked. */ + if (copy_from_user(&irqs, vcpu->guest->lguest_data->interrupts, + sizeof(irqs))) + return; + + bitmap_andnot(irqs, vcpu->irqs_pending, irqs, LGUEST_IRQS); + + irq = find_first_bit(irqs, LGUEST_IRQS); + if (irq >=...

Hi all, I've been working on lguest64 and in order to do this, I had to move a lot of the i386 specific out of the way. Well, the lguest64 port is still not ready to display, but before Rusty makes too many changes I would like this in upstream so I don't have to keep repeating my changes :-) So this patch series moves lguest32 out of the way for other archs. -- Steve

Hi all, I've been working on lguest64 and in order to do this, I had to move a lot of the i386 specific out of the way. Well, the lguest64 port is still not ready to display, but before Rusty makes too many changes I would like this in upstream so I don't have to keep repeating my changes :-) So this patch series moves lguest32 out of the way for other archs. -- Steve