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xen/pass-through: correctly deal with RW1C bits 

Introduce yet another mask for them, so that the generic routine can
handle them, at once rendering xen_pt_pmcsr_reg_write() superfluous.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
This commit is contained in:
Jan Beulich 2015-12-09 15:47:28 +00:00 committed by Stefano Stabellini
parent bdfe5159cb
commit 55c8672c2e
2 changed files with 14 additions and 26 deletions
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2
hw/xen/xen_pt.h
View File

@ -113,6 +113,8 @@ struct XenPTRegInfo {
uint32_t res_mask;
/* reg read only field mask (ON:RO/ROS, OFF:other) */
uint32_t ro_mask;
/* reg read/write-1-clear field mask (ON:RW1C/RW1CS, OFF:other) */
uint32_t rw1c_mask;
/* reg emulate field mask (ON:emu, OFF:passthrough) */
uint32_t emu_mask;
xen_pt_conf_reg_init init;

38
hw/xen/xen_pt_config_init.c
View File

@ -179,7 +179,8 @@ static int xen_pt_byte_reg_write(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
*data = XEN_PT_MERGE_VALUE(*val, *data, writable_mask);
/* create value for writing to I/O device register */
*val = XEN_PT_MERGE_VALUE(*val, dev_value, throughable_mask);
*val = XEN_PT_MERGE_VALUE(*val, dev_value & ~reg->rw1c_mask,
throughable_mask);
return 0;
}
@ -197,7 +198,8 @@ static int xen_pt_word_reg_write(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
*data = XEN_PT_MERGE_VALUE(*val, *data, writable_mask);
/* create value for writing to I/O device register */
*val = XEN_PT_MERGE_VALUE(*val, dev_value, throughable_mask);
*val = XEN_PT_MERGE_VALUE(*val, dev_value & ~reg->rw1c_mask,
throughable_mask);
return 0;
}
@ -215,7 +217,8 @@ static int xen_pt_long_reg_write(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
*data = XEN_PT_MERGE_VALUE(*val, *data, writable_mask);
/* create value for writing to I/O device register */
*val = XEN_PT_MERGE_VALUE(*val, dev_value, throughable_mask);
*val = XEN_PT_MERGE_VALUE(*val, dev_value & ~reg->rw1c_mask,
throughable_mask);
return 0;
}
@ -633,6 +636,7 @@ static XenPTRegInfo xen_pt_emu_reg_header0[] = {
.init_val = 0x0000,
.res_mask = 0x0007,
.ro_mask = 0x06F8,
.rw1c_mask = 0xF900,
.emu_mask = 0x0010,
.init = xen_pt_status_reg_init,
.u.w.read = xen_pt_word_reg_read,
@ -944,6 +948,7 @@ static XenPTRegInfo xen_pt_emu_reg_pcie[] = {
.size = 2,
.res_mask = 0xFFC0,
.ro_mask = 0x0030,
.rw1c_mask = 0x000F,
.init = xen_pt_common_reg_init,
.u.w.read = xen_pt_word_reg_read,
.u.w.write = xen_pt_word_reg_write,
@ -964,6 +969,7 @@ static XenPTRegInfo xen_pt_emu_reg_pcie[] = {
.offset = PCI_EXP_LNKSTA,
.size = 2,
.ro_mask = 0x3FFF,
.rw1c_mask = 0xC000,
.init = xen_pt_common_reg_init,
.u.w.read = xen_pt_word_reg_read,
.u.w.write = xen_pt_word_reg_write,
@ -1000,27 +1006,6 @@ static XenPTRegInfo xen_pt_emu_reg_pcie[] = {
* Power Management Capability
*/
/* write Power Management Control/Status register */
static int xen_pt_pmcsr_reg_write(XenPCIPassthroughState *s,
XenPTReg *cfg_entry, uint16_t *val,
uint16_t dev_value, uint16_t valid_mask)
{
XenPTRegInfo *reg = cfg_entry->reg;
uint16_t writable_mask = 0;
uint16_t throughable_mask = get_throughable_mask(s, reg, valid_mask);
uint16_t *data = cfg_entry->ptr.half_word;
/* modify emulate register */
writable_mask = reg->emu_mask & ~reg->ro_mask & valid_mask;
*data = XEN_PT_MERGE_VALUE(*val, *data, writable_mask);
/* create value for writing to I/O device register */
*val = XEN_PT_MERGE_VALUE(*val, dev_value & ~PCI_PM_CTRL_PME_STATUS,
throughable_mask);
return 0;
}
/* Power Management Capability reg static information table */
static XenPTRegInfo xen_pt_emu_reg_pm[] = {
/* Next Pointer reg */
@ -1051,11 +1036,12 @@ static XenPTRegInfo xen_pt_emu_reg_pm[] = {
.size = 2,
.init_val = 0x0008,
.res_mask = 0x00F0,
.ro_mask = 0xE10C,
.ro_mask = 0x610C,
.rw1c_mask = 0x8000,
.emu_mask = 0x810B,
.init = xen_pt_common_reg_init,
.u.w.read = xen_pt_word_reg_read,
.u.w.write = xen_pt_pmcsr_reg_write,
.u.w.write = xen_pt_word_reg_write,
},
{
.size = 0,