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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v6 11/29] xen/x86: add bitmap of enabled emulated devices
Introduce a bitmap in x86 xen_arch_domainconfig that allows enabling or
disabling specific devices emulated inside of Xen for HVM guests.
Signed-off-by: Roger Pau Monnà <roger.pau@xxxxxxxxxx>
Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Cc: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
Cc: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
Cc: Ian Campbell <ian.campbell@xxxxxxxxxx>
Cc: Wei Liu <wei.liu2@xxxxxxxxxx>
Cc: Jan Beulich <jbeulich@xxxxxxxx>
Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
Changes since v4:
- Add a check to make sure the emulation bitmap is sane (undefined bits are
all 0s).
- Add Andrew Cooper Reviewed-by.
Changes since v3:
- Return EOPNOTSUPP instead of ENOPERM if an invalid emulation mask is
used.
- Fix error messages (prefix them with d%d and use %#x instead of 0x%x).
- Clearly state in the public header that emulation_flags should only be
used with HVM guests.
- Add a XEN_X86 prefix to the emulation flags defines.
- Properly parenthese the has_* marcos.
---
tools/libxl/libxl_x86.c | 8 ++++++--
xen/arch/x86/domain.c | 23 +++++++++++++++++++++++
xen/include/asm-x86/domain.h | 13 +++++++++++++
xen/include/public/arch-x86/xen.h | 21 ++++++++++++++++++++-
4 files changed, 62 insertions(+), 3 deletions(-)
diff --git a/tools/libxl/libxl_x86.c b/tools/libxl/libxl_x86.c
index 9276126..9ecd85d 100644
--- a/tools/libxl/libxl_x86.c
+++ b/tools/libxl/libxl_x86.c
@@ -7,8 +7,12 @@ int libxl__arch_domain_prepare_config(libxl__gc *gc,
libxl_domain_config *d_config,
xc_domain_configuration_t *xc_config)
{
- /* No specific configuration right now */
-
+ if (d_config->c_info.type == LIBXL_DOMAIN_TYPE_HVM)
+ xc_config->emulation_flags = (XEN_X86_EMU_LAPIC | XEN_X86_EMU_HPET |
+ XEN_X86_EMU_PMTIMER | XEN_X86_EMU_RTC |
+ XEN_X86_EMU_IOAPIC | XEN_X86_EMU_PIC |
+ XEN_X86_EMU_PMU | XEN_X86_EMU_VGA |
+ XEN_X86_EMU_IOMMU);
return 0;
}
diff --git a/xen/arch/x86/domain.c b/xen/arch/x86/domain.c
index 045f6ff..fe9504f 100644
--- a/xen/arch/x86/domain.c
+++ b/xen/arch/x86/domain.c
@@ -555,6 +555,29 @@ int arch_domain_create(struct domain *d, unsigned int
domcr_flags,
d->domain_id);
}
+ if ( is_hvm_domain(d) )
+ {
+ uint32_t emulation_mask = (XEN_X86_EMU_LAPIC | XEN_X86_EMU_HPET |
+ XEN_X86_EMU_PMTIMER | XEN_X86_EMU_RTC |
+ XEN_X86_EMU_IOAPIC | XEN_X86_EMU_PIC |
+ XEN_X86_EMU_PMU | XEN_X86_EMU_VGA |
+ XEN_X86_EMU_IOMMU);
+ if ( (config->emulation_flags & ~emulation_mask) != 0 )
+ {
+ printk(XENLOG_G_ERR "d%d: Invalid emulation bitmap: %#x.\n",
+ d->domain_id, config->emulation_flags);
+ return -EINVAL;
+ }
+ if ( config->emulation_flags != emulation_mask )
+ {
+ printk(XENLOG_G_ERR "d%d: Xen does not allow HVM creation with the
"
+ "current selection of emulators: %#x.\n", d->domain_id,
+ config->emulation_flags);
+ return -EOPNOTSUPP;
+ }
+ d->arch.emulation_flags = config->emulation_flags;
+ }
+
if ( has_hvm_container_domain(d) )
{
d->arch.hvm_domain.hap_enabled =
diff --git a/xen/include/asm-x86/domain.h b/xen/include/asm-x86/domain.h
index 0fce09e..2527637 100644
--- a/xen/include/asm-x86/domain.h
+++ b/xen/include/asm-x86/domain.h
@@ -387,8 +387,21 @@ struct arch_domain
bool_t mem_access_emulate_enabled;
struct monitor_write_data *event_write_data;
+
+ /* Emulated devices enabled bitmap. */
+ uint32_t emulation_flags;
} __cacheline_aligned;
+#define has_vlapic(d) ((d)->arch.emulation_flags & XEN_X86_EMU_LAPIC)
+#define has_vhpet(d) ((d)->arch.emulation_flags & XEN_X86_EMU_HPET)
+#define has_vpmtimer(d) ((d)->arch.emulation_flags & XEN_X86_EMU_PMTIMER)
+#define has_vrtc(d) ((d)->arch.emulation_flags & XEN_X86_EMU_RTC)
+#define has_vioapic(d) ((d)->arch.emulation_flags & XEN_X86_EMU_IOAPIC)
+#define has_vpic(d) ((d)->arch.emulation_flags & XEN_X86_EMU_PIC)
+#define has_vpmu(d) ((d)->arch.emulation_flags & XEN_X86_EMU_PMU)
+#define has_vvga(d) ((d)->arch.emulation_flags & XEN_X86_EMU_VGA)
+#define has_viommu(d) ((d)->arch.emulation_flags & XEN_X86_EMU_IOMMU)
+
#define has_arch_pdevs(d) (!list_empty(&(d)->arch.pdev_list))
#define gdt_ldt_pt_idx(v) \
diff --git a/xen/include/public/arch-x86/xen.h
b/xen/include/public/arch-x86/xen.h
index 2ecc9c9..98cae41 100644
--- a/xen/include/public/arch-x86/xen.h
+++ b/xen/include/public/arch-x86/xen.h
@@ -268,7 +268,26 @@ typedef struct arch_shared_info arch_shared_info_t;
* XEN_DOMCTL_INTERFACE_VERSION.
*/
struct xen_arch_domainconfig {
- char dummy;
+#define _XEN_X86_EMU_LAPIC 0
+#define XEN_X86_EMU_LAPIC (1U<<_XEN_X86_EMU_LAPIC)
+#define _XEN_X86_EMU_HPET 1
+#define XEN_X86_EMU_HPET (1U<<_XEN_X86_EMU_HPET)
+#define _XEN_X86_EMU_PMTIMER 2
+#define XEN_X86_EMU_PMTIMER (1U<<_XEN_X86_EMU_PMTIMER)
+#define _XEN_X86_EMU_RTC 3
+#define XEN_X86_EMU_RTC (1U<<_XEN_X86_EMU_RTC)
+#define _XEN_X86_EMU_IOAPIC 4
+#define XEN_X86_EMU_IOAPIC (1U<<_XEN_X86_EMU_IOAPIC)
+#define _XEN_X86_EMU_PIC 5
+#define XEN_X86_EMU_PIC (1U<<_XEN_X86_EMU_PIC)
+#define _XEN_X86_EMU_PMU 6
+#define XEN_X86_EMU_PMU (1U<<_XEN_X86_EMU_PMU)
+#define _XEN_X86_EMU_VGA 7
+#define XEN_X86_EMU_VGA (1U<<_XEN_X86_EMU_VGA)
+#define _XEN_X86_EMU_IOMMU 8
+#define XEN_X86_EMU_IOMMU (1U<<_XEN_X86_EMU_IOMMU)
+ /* For HVM guests only, this field is ignored for PV guests. */
+ uint32_t emulation_flags;
};
#endif
--
1.9.5 (Apple Git-50.3)
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