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Re: [Qemu-devel] [QEMU][RFC PATCH 3/6] memory: Add xen memory hook
From: |
Jan Kiszka |
Subject: |
Re: [Qemu-devel] [QEMU][RFC PATCH 3/6] memory: Add xen memory hook |
Date: |
Thu, 22 Mar 2012 18:44:40 +0100 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686 (x86_64); de; rv:1.8.1.12) Gecko/20080226 SUSE/2.0.0.12-1.1 Thunderbird/2.0.0.12 Mnenhy/0.7.5.666 |
On 2012-03-22 17:01, Julien Grall wrote:
> QEMU will now register all memory range (PIO and MMIO) in Xen.
> We distinct two phases in memory registered :
> - initialization
> - running
>
> For all range registered during the initialization, QEMU will
> check with XenStore if it is authorized to use them.
> After the initialization, QEMU can register all range. Indeed,
> the new ranges will be for PCI Bar.
>
> Signed-off-by: Julien Grall <address@hidden>
> ---
> exec.c | 9 ++++++
> ioport.c | 17 ++++++++++++
> xen-all.c | 83
> +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 109 insertions(+), 0 deletions(-)
>
> diff --git a/exec.c b/exec.c
> index 780f63f..42d8c56 100644
> --- a/exec.c
> +++ b/exec.c
> @@ -3557,12 +3557,21 @@ static void core_commit(MemoryListener *listener)
> static void core_region_add(MemoryListener *listener,
> MemoryRegionSection *section)
> {
> + if (xen_enabled()) {
> + xen_map_iorange(section->offset_within_address_space,
> + section->size, 1);
> + }
> +
> cpu_register_physical_memory_log(section, section->readonly);
> }
>
> static void core_region_del(MemoryListener *listener,
> MemoryRegionSection *section)
> {
> + if (xen_enabled()) {
> + xen_unmap_iorange(section->offset_within_address_space,
> + section->size, 1);
> + }
> }
memory_listener_register(xen_io_hooks, system_memory)?
>
> static void core_region_nop(MemoryListener *listener,
> diff --git a/ioport.c b/ioport.c
> index 78a3b89..073ed75 100644
> --- a/ioport.c
> +++ b/ioport.c
> @@ -28,6 +28,7 @@
> #include "ioport.h"
> #include "trace.h"
> #include "memory.h"
> +#include "hw/xen.h"
>
> /***********************************************************/
> /* IO Port */
> @@ -155,6 +156,11 @@ int register_ioport_read(pio_addr_t start, int length,
> int size,
> i);
> ioport_opaque[i] = opaque;
> }
> +
> + if (xen_enabled()) {
> + xen_map_iorange(start, length, 0);
> + }
> +
> return 0;
> }
>
> @@ -175,7 +181,13 @@ int register_ioport_write(pio_addr_t start, int length,
> int size,
> i);
> ioport_opaque[i] = opaque;
> }
> +
> + if (xen_enabled()) {
> + xen_map_iorange(start, length, 0);
> + }
> +
> return 0;
> +
> }
>
> static uint32_t ioport_readb_thunk(void *opaque, uint32_t addr)
> @@ -260,6 +272,11 @@ void isa_unassign_ioport(pio_addr_t start, int length)
> ioport_destructor_table[start](ioport_opaque[start]);
> ioport_destructor_table[start] = NULL;
> }
> +
> + if (xen_enabled()) {
> + xen_unmap_iorange(start, length, 0);
> + }
> +
> for(i = start; i < start + length; i++) {
> ioport_read_table[0][i] = NULL;
> ioport_read_table[1][i] = NULL;
memory_listener_register(xen_hooks, system_io)?
Even if that is not yet powerful enough, tuning the hooks is usually
better than open-coding.
Jan
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- [Qemu-devel] [QEMU][RFC PATCH 0/6] QEMU disaggregation, Julien Grall, 2012/03/22
- [Qemu-devel] [QEMU][RFC PATCH 6/6] xen: handle qemu disaggregation, Julien Grall, 2012/03/22
- [Qemu-devel] [QEMU][RFC PATCH 3/6] memory: Add xen memory hook, Julien Grall, 2012/03/22
- Re: [Qemu-devel] [QEMU][RFC PATCH 3/6] memory: Add xen memory hook,
Jan Kiszka <=
- Re: [Qemu-devel] [QEMU][RFC PATCH 3/6] memory: Add xen memory hook, Julien Grall, 2012/03/23
- Re: [Qemu-devel] [QEMU][RFC PATCH 3/6] memory: Add xen memory hook, Jan Kiszka, 2012/03/23
- Re: [Qemu-devel] [QEMU][RFC PATCH 3/6] memory: Add xen memory hook, Avi Kivity, 2012/03/25
- Re: [Qemu-devel] [QEMU][RFC PATCH 3/6] memory: Add xen memory hook, Stefano Stabellini, 2012/03/26
- Re: [Qemu-devel] [QEMU][RFC PATCH 3/6] memory: Add xen memory hook, Avi Kivity, 2012/03/26
- Re: [Qemu-devel] [QEMU][RFC PATCH 3/6] memory: Add xen memory hook, Julien Grall, 2012/03/26
- Re: [Qemu-devel] [QEMU][RFC PATCH 3/6] memory: Add xen memory hook, Avi Kivity, 2012/03/26
Re: [Qemu-devel] [QEMU][RFC PATCH 3/6] memory: Add xen memory hook, Anthony Liguori, 2012/03/23
[Qemu-devel] [QEMU][RFC PATCH 1/6] option: Add -xen-dmid, Julien Grall, 2012/03/22